The authors would like to acknowledge support through the American Heart Association (10SDG2630139), the Welch Foundation and through the NIH Director&#8217;s New Innovator Grant (1DP2 OD008716-01). The authors would like to thank the services provided by the ICMB (Institute of Cellular and Molecular Biology) core facility and TherapeUTex at University of Texas at Austin.

참고 :이 프로토콜에 표시된 모든 방법은 기관 동물 케어 및 사용위원회에 의해 승인되었습니다. 외과 표 1. 준비 <ol><li> 해부 현미경, 수술 테이블에 따뜻한 물을 재순환과 가열 패드를 설정합니다. 가열 패드 상 스테인리스 기판을 놓는다. 베이스 플레이트와 가열 패드에 멸균 흡수 패드를 놓습니다. </li><li> 인접한 멸균 흡수 패드에 멸균 된 수술 도구를 정렬합니다. 각진 끝이 뾰족한 집게 두 쌍의 각도 포셉 두 쌍의 세 지혈 겸자, 두 견인기 와이어, 작은 수술 가위, 마이크로 가위, 한 혈관 성형술 와이어 (0.15 인치 직경) 6.0 실크 봉합사의 세 6 인치 세그먼트를 수집 . </li><li> 대퇴 동맥의 곡률과 일치하도록 혈관 성형술 와이어의 원형 단부를 구부린다. 이렇게하면, 수술 중에 와이어를 전진하게된다. </li></ol> 2. 준비외과 마우스 <ol><li> 2.5 % 이소 플루 란 흡입에 의해 연속적으로 마우스를 마취. 절차를 통해 동물의 상태를 모니터링해야합니다. 완전히 마취하는지 확인하려면 마우스의 발 핀치 테스트를 수행합니다. 핀치 테스트 투여 할 때 움직이지 않는 동물을 확인합니다. </li><li> 탈수를 방지하기 위해 동물의 눈 연고 윤활 적용. 수술 테이프를 사용하여 흡수 패드에 앙와위에서 동물을 고정합니다. 코 콘을 통해 2.5 %의 이소 플루 란을 투여 계속합니다. </li><li> 제모 크림을 사용하여, 중간 선에 다리와 복부에서 모피를​​ 제거합니다. 물로 피부를 씻어. 탈모는 수술에 앞서 일일 수행 될 수있다. 피부 자극이 발생할 수 있습니다 크림과 함께 과도한 치료를합니다. </li><li> 즉시 수술 전에 피부를 소독하기 위해 면봉으로 면도 한 지역에 포비돈 - 요오드를 적용합니다. 70 % 에탄올 건조와 면도 한 피부를 씻어멸균 면봉으로. 3 번 반복합니다. </li><li> 피하 주사를 통해 카프로 펜의 5 ㎎ / ㎏의 수술 전 투여 량을 관리합니다. </li></ol> 대퇴 동맥의 3. 분리 <ol><li> 작은 수술 가위를 사용하여, 대퇴 동맥 위에 피부 절개를 만곡. 퉁명스럽게 대퇴 동맥을 찾기 위해 견인기 자기 트랙터 fixators을 사용하여 주변 조직을 해부 고정합니다. 멸균 면봉을 사용하여 식염수를 적용 관개를 위해 주기적으로 생리 식염수를 사용하여 조직을 적 십니다. </li><li> 집게를 사용하여 대퇴 동맥을 분리합니다. 부드럽게 끝이 뾰족한 집게를 사용하여 혈관 번들에서 신경을 분리합니다. 정맥을 천공하지 말고, 신경에 손상을주지 않습니다. 그것을 자극 피하려면 번들에서 신경을 밀어 넣습니다. </li><li> 조심스럽게 대퇴 분기의 위치, 대퇴 동맥에서 대퇴 정맥을 분리합니다. 분기의 지역은 해부 특히 어렵다. </li><li> 피osterior 분기에, 루프 지혈과 대퇴 동맥과 보안에서 6.0 실크 봉합사. 이 근위 봉합사 동맥 혈류를 제한하는 데 사용된다. 주 : 소작 방법 대 결찰 방법을 수행 할 때 관계에 다소 차이가있다 (도 1 및도 2 참조). </li><li> 분기에 원위부, 루프 6.0 실크 대퇴 동맥에서 봉합 및 지혈 고정합니다. 동맥의 위치에있는이 말단 봉합 보조. </li><li> 대퇴 동맥의 근육 분기 아래 루프 두 봉합, 그것들을 미리 묶어 지혈 고정합니다. 식염수로 조직을 습하게해야합니다. 와이어 부상 소작 방법을 수행하면, 하나의 루프 형 봉합사 근육 지점에 필요하다. </li></ol> 대퇴 동맥 와이어 부상 4. 성능 <ol><li> 근위 봉합사 당기는 대퇴 동맥에 혈류를 제한한다. 약간 먼 hemost 당겨지혈이 지점을 확보에서와 arteriotomy의 사이트를 노출합니다. 주위 봉합을 매서 근육 분기를 결찰. 주 : 상향 동맥 리프팅보다 효과적으로 가로 당김 형보다 혈류를 제한 할 것이다. </li><li> 두 봉합 사이의 소작으로 작은 지점을 끊다. 마이크로 가위를 사용하여 분기의 측면 지점에서 arteriotomy을 수행합니다. 마이크로 가위를 안정화 외과 테이프의 롤에 균형 집게를 사용합니다. </li><li> 끝이 뾰족한 집게를 사용 arteriotomy의 존재를 확인합니다. 부드럽게 집게로 arteriotomy의 오프닝을 들어 올립니다. 집게를 사용 arteriotomy에 와이어의 둥근 끝을 소개합니다. 와이어의 발전을 용이하게하기 위해, 주사기를 사용하여 영역 리도카인 한두 방울을 가하여. </li><li> 와이어 근위 봉합사 도달하면 봉합사를 해제하고 와이어의 전진을 방해 할 수 없도록하여 조정한다. 이 더 진행되지 때까지 와이어를 삽입합니다. 번째의 선단전자 와이어 사타구니 인대의 영역에서 중지해야합니다. </li><li> 와이어가 1 분 동안 대퇴 동맥에 남아 허용합니다. 손상과 대퇴 동맥의 내피 세포를 발가 벗기다 데 10 시간을 1 분 후에, 철회 및 절단 운동에 와이어를 진행합니다. 덜 심각한 상해, 와이어 및 동맥 뽑아 횟수를 줄이거 나 단 1 분간 동맥 선을 떠난다. </li><li> 천천히 와이어를 집어 넣으십시오. 와이어의 단부는 둥근 근위 봉합사를 경과하면, 근위 봉합사 당기는 동맥 내로 유동을 제한한다. 완전히 선을 후퇴. </li></ol> 5. 근육 지점을 결찰 <ol><li> 근육 분기에 남아있는 봉합사를 조입니다. 이 arteriotomy에서 출혈을 방지 할 수 있습니다. 근육 분기에 흐름을 반환하고, 그 혈액이 누출되지 확인합니다. 근육 분기에 봉합에서 끝을 낸다. </li></ol> 6. 다른 방법 : 현지화 된 카우Arteriotomy의 terization 주 : 대안은 근육 분기의 결찰을 피하고 큰 메인 대퇴 동맥 혈관을 통해 액세스 할 수 있도록 수행 될 수있다. <ol><li> 4.1에서 시작, 근위 봉합 당겨 대퇴 동맥에 흐름을 제한 할 수 있습니다. 말단 봉합하고 arteriotomy의 사이트 (그림 1과 그림 2) 노출 약간 근육 분기를 고정 봉합을 당깁니다. </li><li> 마이크로 가위를 사용하여, 대퇴 동맥과 근육 지점의 분기점에서 arteriotomy를 수행합니다. 절개 동맥 측 이루어진 경우, 소작하기 쉬울 수있다. 마이크로 가위를 안정화 외과 테이프의 롤에 균형 집게를 사용합니다. </li><li> 소작의 성공을 테스트하려면, 근위 봉합을 풀어 대퇴 동맥에 흐름을 복원합니다. 출혈 arteriotomy에서 발생하면, 소작을 반복한다. 소작이 성공하면, 혈류를 다시한다arteriotomy 원위부 저장됩니다. </li><li> 와이어를 소개하고 4 절에 설명 된대로 와이어 부상을 수행합니다. </li><li> 대퇴 동맥으로 혈액의 흐름을 제한 계속합니다. 적어도 6인치 마우스에서 멀리 뾰족한 소작을 가열. 소작 팁이 냉각으로, 절개를 닫습니다 arteriotomy의 다른 쪽면을 가볍게 적용됩니다. </li><li> 소작의 성공을 테스트하려면, 근위 봉합을 풀어 대퇴 동맥에 흐름을 복원합니다. 출혈 arteriotomy에서 발생하면, 소작을 반복한다. 소작이 성공하면, 혈류 arteriotomy 원위부 복원한다. 임시 근위 및 원위 관계를 제거합니다. </li></ol> 혈관 주위 약물 전달 패치 7. 주입 <ol><li> 이전의 연구 (11)에서 또는 이와 유사한 방법을 사용하여 기술 된 바와 같이 혈관 주위 약물 패치를 생성하는 생성 될 수있다. 멸균 가위를 사용하여 약물 전달 패치의 배리어 영역의 모서리를 무디게 </li><li> 약물 전달 팻 배치동맥 대향 약물 방출면이 부상 대퇴 동맥 상 CH. 필요에 따라, 패치의 위치를​​ 개선하는 집게를 사용한다. </li></ol> 8. 상처 폐쇄 및 복구 <ol><li> 광장 노트로 구성된 간단한 중단 봉합 상처를 닫습니다. 불연속 봉합사 동물 봉합사를 제거하려고 할 경우에 상처 봉합을 연장. </li><li> 마취를 끄고 설정부터 동물을 제거합니다. 동물이 온난화 패드에 복구 할 수 있습니다. </li><li> 마우스의 회복을 모니터링하기 위해 계속합니다. 이 닫혀 있는지 확인하기 위해 매일 절개 사이트를 확인하십시오. 수술 후 통증의 치료를 위해 2 일 후 매 12 시간을 수술 후 5 ㎎ / 카프로 펜마다 12 시간의 kg의 피하 주사를 관리합니다. 통증이 초기 이일 이상 계속되면, 더 진통제에 대한 방향에 대한 수의사에게 문의하십시오. </li></ol> 조직학 9. 수확 대퇴 동맥 <ol><li> 수술 후 이십팔일에서 마우스 이산화탄소 안락사를 수행합니다. 주 : 이산화탄소의 적절한 유량이 분당 챔버 10-30 %로 치환해야하며, 사용 된 챔버의 크기에 따라 달라진다. 다이어프램과 심장 천자의 절단은 안락사의 보조 방법으로 수행해야합니다. </li><li> 수술 테이프를 사용 누운 위치에 마우스를 고정합니다. 초기 수술 절개가되었다 대퇴 동맥을 통해 절개를합니다. </li><li> 손상된 동맥과 반대쪽 다리에서 손상되지 않은 동맥, 모두 퉁명스럽게 해부 대퇴 동맥을 찾기 위해 견인기 및 자기 견인기 fixators을 사용하여 주변 조직에 고정합니다. 주기적으로 관개 식염수를 사용하여 조직을 적 십니다. 멸균 면봉을 사용하여 식염수를 적용합니다. 동맥을 손상하지 않도록주의하십시오. </li><li> 대퇴 동맥 복부 대동맥에 arteriotomy 원래의 위치로부터 분리 된 후, SEG 넥타이arteriotomy의 원래 사이트 근처 실크 봉합사, 표준. 이 봉합사 대퇴 동맥의 가장 말단부를 확인하고 샘플의 처리를 완화 시키는데 도움이된다. </li><li> 마이크로 해부 가위를 사용하면 대퇴 동맥을 절제합니다. 봉합 한 절개는 원위부합니다. 복부 대동맥 옆에, 대퇴 동맥의 반대쪽에 다른 절개를합니다. </li><li> 식염수가 들어있는 유리 페트리 접시에 절제 동맥을 전송합니다. 초과 결합 조직이나 지방을 제거하기 위해 추가로 동맥을 해부하다. 부드럽게 식염수로 세척하여 루멘에서 혈액을 제거합니다. </li><li> 10 % 포르말린의 유리 병에 동맥을 전송합니다. 부드러운 48 시간 동안 락을 함께 4 ° C에서 유리 병을 저장합니다. </li><li> 가 조직학을 위해 처리 될 때까지 저장하기 위해 70 % 에탄올에 고정 동맥 전송. </li><li> 파라핀 블록과 부분 염색에 대한 블록 동맥을 포함합니다. </li><li> 부상과 내막 우울의 정도를 평가하기 위해 조직 화학 및 면역 화학 염색을 수행erplasia. 참고 : 대표 결과를 위해, 우리는 탄성 얇은 판과 다른 동맥의 구성 요소를 시각화하기 위해 핵 및 전반적인 형태 또는 Movat의 Pentachrome 얼룩을 시각화하기 위해 헤 마톡 실린 및 에오신을 사용했다. </li></ol>

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W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Coronary+stents:+current+status.">Coronary stents: current status.</a> J Am Coll Cardiol. 56 (10 Suppl), S1-S42 (2010).</li><li>Park, S. J., Kim, Y. H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Current+status+of+percutaneous+coronary+intervention+with+drug-eluting+stents+in+Asia.">Current status of percutaneous coronary intervention with drug-eluting stents in Asia.</a> Circulation. 118 (25), 2730-2737 (2008).</li><li>Alfonso, F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Treatment+of+drug-eluting+stent+restenosis+the+new+pilgrimage:+quo+vadis.">Treatment of drug-eluting stent restenosis the new pilgrimage: quo vadis.</a> J Am Coll Cardiol. 55 (24), 2717-2720 (2010).</li><li>Dake, M. D., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Paclitaxel-eluting+stents+show+superiority+to+balloon+angioplasty+and+bare+metal+stents+in+femoropopliteal+disease:+twelve-month+Zilver+PTX+randomized+study+results.">Paclitaxel-eluting stents show superiority to balloon angioplasty and bare metal stents in femoropopliteal disease: twelve-month Zilver PTX randomized study results.</a> Circ Cardiovasc Interv. 4 (5), 495-504 (2011).</li><li>Bosiers, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Results+of+the+Protege+EverFlex+200-mm-long+nitinol+stent+(ev3)+in+TASC+C+and+D+femoropopliteal+lesions.">Results of the Protege EverFlex 200-mm-long nitinol stent (ev3) in TASC C and D femoropopliteal lesions.</a> J Vasc Surg. 54 (4), 1042-1050 (2011).</li><li>Duda, S. H., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Drug-eluting+and+bare+nitinol+stents+for+the+treatment+of+atherosclerotic+lesions+in+the+superficial+femoral+artery:+long-term+results+from+the+SIROCCO+trial.">Drug-eluting and bare nitinol stents for the treatment of atherosclerotic lesions in the superficial femoral artery: long-term results from the SIROCCO trial.</a> J Endovasc Ther. 13 (6), 701-710 (2006).</li><li>Kumar, A., Lindner, V. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Remodeling+with+neointima+formation+in+the+mouse+carotid+artery+after+cessation+of+blood+flow.">Remodeling with neointima formation in the mouse carotid artery after cessation of blood flow.</a> Arterioscler Thromb Vasc Biol. 17 (10), 2238-2244 (1997).</li><li>Sata, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+mouse+model+of+vascular+injury+that+induces+rapid+onset+of+medial+cell+apoptosis+followed+by+reproducible+neointimal+hyperplasia.">A mouse model of vascular injury that induces rapid onset of medial cell apoptosis followed by reproducible neointimal hyperplasia.</a> J Mol Cell Cardiol. 32 (11), 2097-2104 (2000).</li><li>Roque, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Mouse+model+of+femoral+artery+denudation+injury+associated+with+the+rapid+accumulation+of+adhesion+molecules+on+the+luminal+surface+and+recruitment+of+neutrophils.">Mouse model of femoral artery denudation injury associated with the rapid accumulation of adhesion molecules on the luminal surface and recruitment of neutrophils.</a> Arterioscler Thromb Vasc Biol. 20 (2), 335-342 (2000).</li><li>Lindner, V., Fingerle, J., Reidy, M. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Mouse+model+of+arterial+injury.">Mouse model of arterial injury.</a> Circ Res. 73 (5), 792-796 (1993).</li><li>Edelman, E. R., Adams, D. H., Karnovsky, M. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Effect+of+controlled+adventitial+heparin+delivery+on+smooth+muscle+cell+proliferation+following+endothelial+injury.">Effect of controlled adventitial heparin delivery on smooth muscle cell proliferation following endothelial injury.</a> Proc Natl Acad Sci U S A. 87 (10), 3773-3777 (1990).</li><li>Stemerman, M. B., Ross, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Experimental+arteriosclerosis.+I.+Fibrous+plaque+formation+in+primates,+an+electron+microscope+study.">Experimental arteriosclerosis. I. Fibrous plaque formation in primates, an electron microscope study.</a> J Exp Med. 136 (4), 769-789 (1972).</li><li>Brouchet, L., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Estradiol+accelerates+reendothelialization+in+mouse+carotid+artery+through+estrogen+receptor-alpha+but+not+estrogen+receptor-beta.">Estradiol accelerates reendothelialization in mouse carotid artery through estrogen receptor-alpha but not estrogen receptor-beta.</a> Circulation. 103 (3), 423-428 (2001).</li><li>Filipe, C., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Estradiol+accelerates+endothelial+healing+through+the+retrograde+commitment+of+uninjured+endothelium.">Estradiol accelerates endothelial healing through the retrograde commitment of uninjured endothelium.</a> Am J Physiol Heart Circ Physiol. 294 (6), H2822-H2830 (2008).</li><li>Feuls, R., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Microvascular+denudation+of+the+femoral+artery+of+the+mouse+as+a+model+for+restenosis.">Microvascular denudation of the femoral artery of the mouse as a model for restenosis.</a> Rofo. 175 (7), 952-957 (2003).</li><li>Holt, A. W., Tulis, D. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Experimental+Rat+and+Mouse+Carotid+Artery+Surgery:+Injury+&amp;+Remodeling+Studies.">Experimental Rat and Mouse Carotid Artery Surgery: Injury &amp; Remodeling Studies.</a> ISRN Minim Invasive Surg. 2013, (2013).</li><li>Iafrati, M. D., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Estrogen+inhibits+the+vascular+injury+response+in+estrogen+receptor+alpha-deficient+mice.">Estrogen inhibits the vascular injury response in estrogen receptor alpha-deficient mice.</a> Nat Med. 3 (5), 545-548 (1997).</li><li>Sullivan, T. R., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Estrogen+inhibits+the+response-to-injury+in+a+mouse+carotid+artery+model.">Estrogen inhibits the response-to-injury in a mouse carotid artery model.</a> J Clin Invest. 96 (5), 2482-2488 (1995).</li><li>Yin, Y., Zhao, X., Fang, Y., Huang, L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Carotid+artery+wire+injury+mouse+model+with+a+nonmicrosurgical+procedure.">Carotid artery wire injury mouse model with a nonmicrosurgical procedure.</a> Vascular. 18 (4), 221-226 (2010).</li><li>Nam, D., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Partial+carotid+ligation+is+a+model+of+acutely+induced+disturbed+flow,+leading+to+rapid+endothelial+dysfunction+and+atherosclerosis.">Partial carotid ligation is a model of acutely induced disturbed flow, leading to rapid endothelial dysfunction and atherosclerosis.</a> Am J Physiol Heart Circ Physiol. 297 (4), H1535-H1543 (2009).</li><li>Nam, D., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+model+of+disturbed+flow-induced+atherosclerosis+in+mouse+carotid+artery+by+partial+ligation+and+a+simple+method+of+RNA+isolation+from+carotid+endothelium.">A model of disturbed flow-induced atherosclerosis in mouse carotid artery by partial ligation and a simple method of RNA isolation from carotid endothelium.</a> J Vis Exp. (40), (2010).</li><li>Kuhlmann, M. T., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Implantation+of+a+carotid+cuff+for+triggering+shear-stress+induced+atherosclerosis+in+mice.">Implantation of a carotid cuff for triggering shear-stress induced atherosclerosis in mice.</a> J Vis Exp. (59), (2012).</li><li>Carmeliet, P., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Vascular+wound+healing+and+neointima+formation+induced+by+perivascular+electric+injury+in+mice.">Vascular wound healing and neointima formation induced by perivascular electric injury in mice.</a> Am J Pathol. 150 (2), 761-776 (1997).</li></ol>

We have presented a method for performing vascular injury in mice and delivery therapeutic compounds to the injured region through a perivascular cuff. The ligation method for femoral and carotid arteries has been described in conventional methods papers and characterized extensively11-14,19-23 and we present an alternative method for achieving the same vascular injury that is less technically demanding procedure that can often be used in younger mice. One of the chief advantages of the using a mouse wire inju...

Arterial injury and inflammation caused by angioplasty and stent implantation can induce neointimal hyperplasia that contributes to the thickening of the arterial wall, a process known as restenosis.1,2 The formation of restenosis is major mode of failure for interventions such as angioplasty and stenting with bare metal stents.3 Due to recent concerns with the inhibition of vascular healing in arteries treated with drug eluting stents, there is also a need to find compounds that can inhibit restenosis while maintaining vascular healing and re-endothelialization.4-7 In addition, while stents have had success in the coronary vasculature, percutaneous interventions of all types in the peripheral arteries continue to fail at a higher rate due to restenosis.8-10 Mouse models of surgical interventions allow the use of powerful genetic manipulations that can provide mechanistic insight into the mechanisms underlying the failure of clinical therapies and can provide an initial test bed for compounds to inhibit intimal hyperplasia. 
Here, we describe a mouse model of vascular injury that allows the testing of therapeutic compounds to inhibit neointimal hyperplasia and assess whether their effects on re-endothelialization following endothelial denudation. A key challenge in executing vascular injury in mice is the technical skill needed to obtain vascular access and to restore flow to the injured artery following the wire injury. For this reason, simple arterial ligation models have been used to study neointimal hyperplasia in mice that do not require endovascular manipulations but are easier to implement.11 However, this type of surgical model differs substantially from the mechanical and biological aspects of a percutaneous intervention, lacking key aspects including arterial wall stretch, endothelial denudation and luminal blood flow following injury. 
We present two methods for obtaining and closing vascular access for wire injury of the femoral artery in mice. The first technique is the conventional method described by several groups previously and uses vascular access through a side branch of the femoral artery.12-14 This method requires older, larger mice and more surgical skill to implement the endoluminal access through the smaller artery. It also requires the ligation of the muscular branch of the femoral artery following the procedure. The second method we describe uses an arteriotomy in the branch point of the main and side branch and thereby allows for a larger access to the artery for performing wire injury. In this method, the arteriotomy is closed using controlled local cauterization that leaves both branches with blood flow following the procedure. The conventional method is applicable to mice of at least 20 weeks of age while the alternative method can be used in mice of at least 15 weeks of age. In both methods, the wire creates arterial stretch and abrasion leading to injury and endothelial denudation. Following either procedure a perivascular drug delivery patch can be implanted that allows the delivery of compounds to alter the response to injury. The use of the drug delivery patch allows mice to be used as a test bed for new compounds to inhibit restenosis through perivascular therapies.15,16

<table border="0" cellpadding="0" cellspacing="0" width="956">
	<tbody>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Name</td>
			<td style="width:239px;">Company</td>
			<td style="width:239px;">Catalog Number</td>
			<td style="width:239px;">Comments</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Straight spring wire, 0.15&#8221; diameter</td>
			<td style="width:239px;">Cook</td>
			<td style="width:239px;">G02426</td>
			<td style="width:239px;"></td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">High Temperature cautery</td>
			<td style="width:239px;">Bovie Medical Corp.</td>
			<td style="width:239px;">HIT1</td>
			<td style="width:239px;"></td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">High-temperature fine tip for cautery</td>
			<td style="width:239px;">Bovie Medical Corp.</td>
			<td style="width:239px;">H101</td>
			<td style="width:239px;"></td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Micro-scissors</td>
			<td style="width:239px;">Fine Science Tools</td>
			<td style="width:239px;">15000-13</td>
			<td style="width:239px;">For performance of arteriotomy</td>
		</tr>
		<tr height="43">
			<td height="43" style="height:43px;width:239px;">Angled fine-tipped forceps</td>
			<td style="width:239px;">Fine Science Tools</td>
			<td style="width:239px;">11251-35</td>
			<td style="width:239px;">For blunt dissection of vascular bundle</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Angled forceps</td>
			<td style="width:239px;">Roboz</td>
			<td style="width:239px;">RS-5069</td>
			<td style="width:239px;">For clearing tissues</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Surgical scissors</td>
			<td style="width:239px;">Roboz</td>
			<td style="width:239px;">RS-5840</td>
			<td style="width:239px;">For cutting skin</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Retractor</td>
			<td style="width:239px;">Fine Science Tools</td>
			<td style="width:239px;">18200-10</td>
			<td style="width:239px;"></td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Retractor wire</td>
			<td style="width:239px;">Fine Science Tools</td>
			<td style="width:239px;">18200-05</td>
			<td style="width:239px;">Attached to retractor</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Base plate</td>
			<td style="width:239px;">Fine Science Tools</td>
			<td style="width:239px;">18200-03</td>
			<td style="width:239px;">For use with retractor</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Magnetic retractor fixator</td>
			<td style="width:239px;">Fine Science Tools</td>
			<td style="width:239px;">18200-01</td>
			<td style="width:239px;"></td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Needle Holder</td>
			<td style="width:239px;">Roboz</td>
			<td style="width:239px;">RS-7822</td>
			<td style="width:239px;"></td>
		</tr>
		<tr height="43">
			<td height="43" style="height:43px;width:239px;">Hemostatic forceps</td>
			<td style="width:239px;">Biomedical Research Instruments, Inc.</td>
			<td style="width:239px;">34-1000</td>
			<td style="width:239px;"></td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Dissecting microscope</td>
			<td style="width:239px;">Meiji Techno</td>
			<td style="width:239px;">EMZ-5TR</td>
			<td style="width:239px;"></td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Microscope light source</td>
			<td style="width:239px;">Meiji Techno</td>
			<td style="width:239px;">FT191</td>
			<td style="width:239px;"></td>
		</tr>
		<tr height="43">
			<td height="43" style="height:43px;width:239px;">Warm water recirculator</td>
			<td style="width:239px;">Gaymar</td>
			<td style="width:239px;">TP-500</td>
			<td style="width:239px;">For maintaining mouse body temperature</td>
		</tr>
		<tr height="43">
			<td height="43" style="height:43px;width:239px;">Reusable heating pad</td>
			<td style="width:239px;">Gaymar</td>
			<td style="width:239px;">TP-R 22G</td>
			<td style="width:239px;">For maintaining mouse body temperature</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Lidocaine</td>
			<td style="width:239px;">Various</td>
			<td style="width:239px;"></td>
			<td style="width:239px;"></td>
		</tr>
		<tr height="43">
			<td height="43" style="height:43px;width:239px;">4.0 Vicryl suture with half circle needle</td>
			<td style="width:239px;">Ethicon</td>
			<td style="width:239px;">J494G</td>
			<td style="width:239px;">For post-surgical wound closure</td>
		</tr>
		<tr height="43">
			<td height="43" style="height:43px;width:239px;">Sterile cotton-tipped applicators</td>
			<td style="width:239px;">Puritan</td>
			<td style="width:239px;">25-806-2WC</td>
			<td style="width:239px;">For application of depilatory cream and absorbing fluids</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Depilatory cream</td>
			<td style="width:239px;">Nair</td>
			<td style="width:239px;"></td>
			<td style="width:239px;"></td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Isoflurane</td>
			<td style="width:239px;">Various</td>
			<td style="width:239px;"></td>
			<td style="width:239px;"></td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Betadine</td>
			<td style="width:239px;">Various</td>
			<td style="width:239px;"></td>
			<td style="width:239px;"></td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">70% ethanol</td>
			<td style="width:239px;">Various</td>
			<td style="width:239px;"></td>
			<td style="width:239px;"></td>
		</tr>
		<tr height="43">
			<td height="43" style="height:43px;width:239px;">6.0 braided silk suture</td>
			<td style="width:239px;">Teleflex Medical</td>
			<td style="width:239px;">4-S</td>
			<td style="width:239px;">For isolation of femoral artery during surgery</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">0.9% sodium chloride</td>
			<td style="width:239px;">Various</td>
			<td style="width:239px;"></td>
			<td style="width:239px;">For irrigating tissues</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Gel eye lubricant</td>
			<td style="width:239px;">Various</td>
			<td style="width:239px;"></td>
			<td style="width:239px;"></td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Glass petri dish</td>
			<td style="width:239px;">Pyrex</td>
			<td>3160-60</td>
			<td>For femoral artery harvest</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">10% buffered formalin</td>
			<td style="width:239px;">Various</td>
			<td></td>
			<td style="width:239px;">For fixation of femoral artery</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">70% ethanol</td>
			<td style="width:239px;">Various</td>
			<td></td>
			<td style="width:239px;">For fixation of femoral artery</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Bouin&#39;s fluid</td>
			<td style="width:239px;">Electron Microscopy Sciences</td>
			<td></td>
			<td style="width:239px;">For Movat&#39;s Pentachrome staining</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Alcian blue, 1%</td>
			<td style="width:239px;">Electron Microscopy Sciences</td>
			<td>26385-01</td>
			<td style="width:239px;">For Movat&#39;s Pentachrome staining</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Alkaline alcohol</td>
			<td style="width:239px;">Electron Microscopy Sciences</td>
			<td>26385-02</td>
			<td style="width:239px;">For Movat&#39;s Pentachrome staining</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Orcein, 0.2%</td>
			<td style="width:239px;">Electron Microscopy Sciences</td>
			<td>26385-03</td>
			<td style="width:239px;">For Movat&#39;s Pentachrome staining</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Hematoxylin alcoholic, 5%</td>
			<td style="width:239px;">Electron Microscopy Sciences</td>
			<td>26385-04</td>
			<td style="width:239px;">For Movat&#39;s Pentachrome staining</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Ferric chloride, 10%</td>
			<td style="width:239px;">Electron Microscopy Sciences</td>
			<td>26385-05</td>
			<td style="width:239px;">For Movat&#39;s Pentachrome staining</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:239px;">Lugol&#39;s Iodine</td>
			<td style="width:239px;">Electron Microscopy Sciences</td>
			<td>26385-06</td>
			<td style="width:239px;">For Movat&#39;s Pentachrome staining</td>
		</tr>
		<tr height="43">
			<td height="43" style="height:43px;width:239px;">Woodstain scarlet-acid fuchsin working solution</td>
			<td style="width:239px;">Electron Microscopy Sciences</td>
			<td>26385-07</td>
			<td style="width:239px;">For Movat&#39;s Pentachrome staining</td>
		</tr>
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			<td style="width:239px;">Electron Microscopy Sciences</td>
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murine model of femoral artery wire injury with implantation of a perivascular drug delivery patch

Percutaneous interventions including balloon angioplasty and stenting have been used to restore blood flow in vessels with occlusive vascular disease. While these therapies lead to the rapid restoration of blood flow, these technologies remain limited by restenosis in the case of bare metal stents and angioplasty, or reduced healing and possibly enhanced risk of thrombosis in the case of drug eluting stents. A key pathophysiological mechanism in the formation of restenosis is intimal hyperplasia caused by the activation of vascular smooth muscle cells and inflammation due to arterial stretch and injury. Surgeries that induce arterial injury in genetically modified mice are useful for the mechanistic study of the vascular response to injury but are often technically challenging to perform in mouse models due to the their small size and lack of appropriate sized devices. We describe two approaches for a surgical technique that induces endothelial denudation and arterial stretch in the femoral artery of mice to produce robust neointimal hyperplasia. The first approach creates an arteriotomy in the muscular branch of the femoral artery to obtain vascular access. Following wire injury this arterial branch is ligated to close the arteriotomy. A second approach creates an arteriotomy in the main femoral artery that is later closed through localized cautery. This method allows for vascular access through a larger vessel and, consequently, provides a less technically demanding procedure that can be used in smaller mice. Following either method of arterial injury, a degradable drug delivery patch can be placed over or around the injured artery to deliver therapeutic agents.

와이어 부상에 따라, 신생 내막의 증식은 시간이 지남에 개발하고 일반적으로 14-28일 후 검사한다. 그림의 조직 학적 결과를 그림과 같이 마우스의 내막 증식증의 강력한 세대에이 작품 리드에 설명 된 기술은 3. 손상되지 않은 대퇴 동맥은 그대로 탄성 얇은 판과 일반 두께와 둘레를 시연 할 예정이다. 부상 대퇴 동맥은 내막의 증식을 보여 탄성 얇은 판을 분해하고 나중?...

Watch this Scientific Journal Video about Murine Model of Femoral Artery Wire Injury with Implantation of a Perivascular Drug Delivery Patch at JoVE.com

Murine Model of Femoral Artery Wire Injury with Implantation of a Perivascular Drug Delivery Patch

We describe a surgical technique that produces wire injury in the femoral artery of mice to induce neointimal hyperplasia to serve as a model testing system for the perivascular delivery of therapeutic compounds for the inhibition of restenosis.

혈관 주위 약물 전달 패치의 주입과 대퇴 동맥 와이어 부상의 쥐 모델

Percutaneous interventions including balloon angioplasty and stenting have been used to restore blood flow in vessels with occlusive vascular disease. ...

murine-model-femoral-artery-wire-injury-with-implantation

Research

JoVE Journal

Medicine

17.8K 조회수.  University of Texas at Austin. We describe a surgical technique that produces wire injury in the femoral artery of mice to induce neointimal hyperplasia to serve as a model testing system for the perivascular delivery of therapeutic compounds for the inhibition of restenosis. 

비디오: Murine Model of Femoral Artery Wire Injury with Implantation of a Perivascular Drug Delivery Patch

Mesenteric Artery Contraction and Relaxation Studies Using Automated Wire Myography

Proximal resistance vessels, such as the mesenteric arteries, contribute substantially to the peripheral resistance. These small vessels of between 100-400 &mu;m in diameter function primarily in directing blood flow to various organs according to the overall requirements of the body. The rat mesenteric artery has a diameter greater than 100 &mu;m. The myography technique, first described by Mulvay and Halpern1, was based on the method proposed by Bevan and Osher2. The technique provides information about small vessels under isometric conditions, where substantial shortening of the muscle preparation is prevented. Since force production and sensitivity of vessels to different agonists is dependent on the extent of stretch, according to active tension-length relation, it is essential to conduct contraction studies under isometric conditions to prevent compliance of the mounting wires. Stainless steel wires are preferred to tungsten wires because of oxidation of the latter, which affects recorded responses3.The technique allows for the comparison of agonist-induced contractions of mounted vessels to obtain evidence for normal function of vascular smooth muscle cell receptors.
We have shown in several studies that isolated mesenteric arteries that are contracted with phenylyephrine relax upon addition of cumulative concentrations of extracellular calcium (Ca2+e). The findings led us to conclude that perivascular sensory nerves, which express the G protein-coupled Ca2+-sensing receptor (CaR), mediate this vasorelaxation response. Using an automated wire myography method, we show here that mesenteric arteries from Wistar, Dahl salt-sensitive(DS) and Dahl salt-resistant (DR) rats respond differently to Ca2+e. Tissues from Wistar rats showed higher Ca2+-sensitivity compared to those from DR and DS. Reduced CaR expression in mesenteric arteries from DS rats correlates with reduced Ca2+e-induced relaxation of isolated, pre-contracted arteries. The data suggest that the CaR is required for relaxation of mesenteric arteries under increased adrenergic tone, as occurs in hypertension, and indicate an inherent defect in the CaR signaling pathway in Dahl animals, which is much more severe in DS.
The method is useful in determining vascular reactivity ex vivo in mesenteric resistance arteries and similar small blood vessels and comparisons between different agonists and/or antagonists can be easily and consistently assessed side-by-side6,7,8.

An automated myography method for force measurements in isolated mesenteric arteries is described. It employs a Mulvany-Halpern Auto Dual Wire Myograph 510A to determine responses to phenylephrine and extracellular calcium. The method allows consistent determination of isometric responses to agonists in small vessels of diameters of 60 - 300 &mu;m, independently.

자동 와이어 Myography를 사용 Mesenteric 동맥 수축과 휴식 연구

Proximal resistance vessels, such as the mesenteric arteries, contribute substantially to the peripheral resistance. These small vessels of between ...

연구

의학

A Murine Model of Stent Implantation in the Carotid Artery for the Study of Restenosis

Despite the considerable progress made in the stent development in the last decades, cardiovascular diseases remain the main cause of death in western countries. Beside the benefits offered by the development of different drug-eluting stents, the coronary revascularization bears also the life-threatening risks of in-stent thrombosis and restenosis. Research on new therapeutic strategies is impaired by the lack of appropriate methods to study stent implantation and restenosis processes. Here, we describe a rapid and accessible procedure of stent implantation in mouse carotid artery, which offers the possibility to study in a convenient way the molecular mechanisms of vessel remodeling and the effects of different drug coatings.

A model of stent implantation in mouse carotid artery is described. Compared to other similar methods, this procedure is very rapid, simple and accessible, offering the possibility to study in a convenient way the vascular wall reaction to different drug-eluting stents and the molecular mechanisms of restenosis.

재 협착의 연구에 대한 경동맥 스텐트 시술의 쥐과 모형

Despite  the considerable progress made in the stent development in the last decades,  cardiovascular diseases remain the main cause of death in western ...

A Murine Model of Myocardial Ischemia-reperfusion Injury through Ligation of the Left Anterior Descending Artery

Acute or chronic myocardial infarction (MI) are cardiovascular events resulting in high morbidity and mortality. Establishing the pathological mechanisms at work during MI and developing effective therapeutic approaches requires methodology to reproducibly simulate the clinical incidence and reflect the pathophysiological changes associated with MI. Here, we describe a surgical method to induce MI in mouse models that can be used for short-term ischemia-reperfusion (I/R) injury as well as permanent ligation. The major advantage of this method is to facilitate location of the left anterior descending artery (LAD) to allow for accurate ligation of this artery to induce ischemia in the left ventricle of the mouse heart. Accurate positioning of the ligature on the LAD increases reproducibility of infarct size and thus produces more reliable results. Greater precision in placement of the ligature will improve the standard surgical approaches to simulate MI in mice, thus reducing the number of experimental animals necessary for statistically relevant studies and improving our understanding of the mechanisms producing cardiac dysfunction following MI. This mouse model of MI is also useful for the preclinical testing of treatments targeting myocardial damage following MI.

We introduce a surgical method to induce experimental ischemia/reperfusion (I/R) injury to simulate myocardial infarction (MI) in mouse models that allows for more clarity in positioning of the ligation on the left anterior descending artery (LAD) to increase the reproducibility of MI experiments in mice.

왼쪽 앞쪽에 내림차순 동맥의 결찰을 통해 심근 허혈 - 재관류 손상의 생쥐 모델

Acute or chronic myocardial infarction (MI) are cardiovascular events resulting in high morbidity and mortality. Establishing the pathological mechanisms ...

A Murine Model of Arterial Restenosis: Technical Aspects of Femoral Wire Injury

Cardiovascular disease caused by atherosclerosis is the leading cause of death in the developed world. Narrowing of the vessel lumen, due to atherosclerotic plaque development or the rupturing of established plaques, interrupts normal blood flow leading to various morbidities such as myocardial infarction and stroke. In the clinic endovascular procedures such as angioplasty are commonly performed to reopen the lumen. However, these treatments inevitably damage the vessel wall as well as the vascular endothelium, triggering an excessive healing response and the development of a neointimal plaque that extends into the lumen causing vessel restenosis (re-narrowing). Restenosis remains a major cause of failure of endovascular treatments for atherosclerosis. Thus, preclinical animal models of restenosis are vitally important for investigating the pathophysiological mechanisms as well as translational approaches to vascular interventions. Among several murine experimental models, femoral artery wire injury is widely accepted as the most suitable for studies of post-angioplasty restenosis because it closely resembles the angioplasty procedure that injures both endothelium and vessel wall. However, many researchers have difficulty utilizing this model due to its high degree of technical difficulty. This is primarily because a metal wire needs to be inserted into the femoral artery, which is approximately three times thinner than the wire, to generate sufficient injury to induce prominent neointima. Here, we describe the essential surgical details to effectively overcome the major technical difficulties of this model. By following the presented procedures, performing the mouse femoral artery wire injury becomes easier. Once familiarized, the whole procedure can be completed within 20 min.

The mouse femoral artery wire injury model of restenosis is technically challenging. In this protocol we show the key technical details essential for successfully performing wire injury to induce consistent&#160;neointima for studies of restenosis.

동맥 재 협착의 쥐 모델 : 대퇴 와이어 부상의 기술적 측면

Cardiovascular disease caused by atherosclerosis is the leading cause of death in the developed world. Narrowing of the vessel lumen, due to ...

Murine Model of Intestinal Ischemia-reperfusion Injury

Intestinal ischemia is a life-threatening condition associated with a broad range of clinical conditions including atherosclerosis, thrombosis, hypotension, necrotizing enterocolitis, bowel transplantation, trauma and chronic inflammation. Intestinal ischemia-reperfusion (IR) injury is a consequence of acute mesenteric ischemia, caused by inadequate blood flow through the mesenteric vessels, resulting in intestinal damage. Reperfusion following ischemia can further exacerbate damage of the intestine. The mechanisms of IR injury are complex and poorly understood. Therefore, experimental small animal models are critical for understanding the pathophysiology of IR injury and the development of novel therapies.
Here we describe a mouse model of acute intestinal IR injury that provides reproducible injury of the small intestine without mortality. This is achieved by inducing ischemia in the region of the distal ileum by temporally occluding the peripheral and terminal collateral branches of the superior mesenteric artery for 60 min using microvascular clips. Reperfusion for 1 hr, or 2 hr after injury results in reproducible injury of the intestine examined by histological analysis. Proper position of the microvascular clips is critical for the procedure. Therefore the video clip provides a detailed visual step-by-step description of this technique. This model of intestinal IR injury can be utilized to study the cellular and molecular mechanisms of injury and regeneration.

Here we describe the detailed procedure of intestinal ischemia-reperfusion in mice which results in reproducible injury without mortality to encourage the standardization of this technique across the field. This model of intestinal ischemia-reperfusion injury can be utilized to study the cellular and molecular mechanisms of injury and regeneration.

창자 허혈 - 재관류 손상의 쥐 모델

Intestinal ischemia is a life-threatening condition associated with a broad range of clinical conditions including atherosclerosis, thrombosis, ...

Induction of Accelerated Atherosclerosis in Mice: The "Wire-Injury" Model

Atherosclerosis is a proliferative fibro-inflammatory disease developing in the arterial wall, inducing a deficient blood flow or a lack of blood flow. Moreover, by rupture of the defective vascular wall, atherosclerosis induces occlusive thrombus formation, which represents the main cause of myocardial infarction or stroke and the most frequent cause of death. Despite the advances in the cardiovascular field, many questions remain unanswered, and additional basic research is essential to improve our understanding of the molecular mechanisms during atherosclerosis and its effects. Due to limited clinical studies, there is a need for representative animal models recreating atherosclerotic conditions such as neointima formation after stent implantation, balloon angioplasty, or endarterectomy. Since the mouse presents many advantages and is the most frequently used model for studying molecular processes, the current study proposes an invasive procedure of endothelial denudation, also known as the wire-injury model, which is representative of the human condition of neointima formation in arteries after revascularization procedures.

Induction of Accelerated Atherosclerosis in Mice: The &quot;Wire-Injury&quot; Model

This study describes an invasive procedure for the induction of accelerated atherosclerosis in mice. In comparison to other methods using electric- or cryo-induced injury, mechanical-induced injury mimics the human condition of restenosis after revascularization therapies and is ideal for the study of the molecular mechanisms involved.

마우스에서 가속 죽상 경화증의 유도: "와이어 부상" 모델

Atherosclerosis is a proliferative fibro-inflammatory disease developing in the arterial wall, inducing a deficient blood flow or a lack of blood flow. ...

Ferric Chloride-induced Canine Carotid Artery Thrombosis: A Large Animal Model of Vascular Injury

Occlusive arterial thrombosis leading to cerebral ischemic stroke and myocardial infarction contributes to ~13 million deaths every year globally. Here, we have translated a vascular injury model from a small animal into a large animal (canine), with slight modifications that can be used for pre-clinical screening of prophylactic and thrombolytic agents. In addition to the surgical methods, the modified protocol describes the step-by-step methods to assess carotid artery canalization by angiography, detailed instructions to process both the brain and carotid artery for histological analysis to verify carotid canalization and cerebral hemorrhage, and specific parameters to complete an assessment of downstream thromboembolic events by utilizing magnetic resonance imaging (MRI). In addition, specific procedural changes from the previously well-established small animal model necessary to translate into a large animal (canine) vascular injury are discussed.

Here, we present the modifications necessary to a well characterized and commonly used small animal ferric chloride-induced (FeCl3) carotid artery injury model for use in a large animal vascular injury model. The resulting model can be utilized for pre-clinical trial assessment of both prophylactic and thrombolytic pharmacological and mechanical interventions.

제 2 철 염화 유도 개 경 동맥 혈전 증: 혈관 손상의 큰 동물 모델

Occlusive arterial thrombosis leading to cerebral ischemic stroke and myocardial infarction contributes to ~13 million deaths every year globally. Here, ...

Isometric Contractility Measurement of the Mouse Mesenteric Artery Using Wire Myography

The wire myograph technique is used to assess the contractility of vascular smooth muscles in response to depolarization, GPCR agonists/inhibitors and drugs. It is widely used in many studies on the physiological functions of vascular smooth muscle, the pathogenesis of vascular diseases such as hypertension, and the development of smooth muscle relaxant drugs. The mouse is a widely used model animal with a large pool of disease models and genetically modified strains. We introduced this method to measure the isometric contraction of mouse mesenteric artery in detail. A 1.4-mm segment of mouse mesenteric resistance artery was isolated and mounted on a myograph chamber by passing two steel wires through its lumen. After equilibration and normalization steps, the vessel segment was potentiated by a high-K+ solution twice prior to the contraction assay. As an example of the application of this method in drug development, we measured the relaxant effect of a novel natural substance, neoliensinine, isolated from a Chinese herb, embryos of the lotus seed (Nelumbo nucifera Gaertn.) on mouse mesenteric arteries. The vessel segments mounted on the myograph chamber were stimulated with a high-K+ solution. When the force tension reached a stable sustained phase, cumulative doses of neoliensinine were added to the chamber. We found that neoliensinine had a dose-dependent relaxant effect on smooth muscle contraction, thus suggesting that it bears potential activity against hypertension. In addition, as the vessel segment can survive at least 4 hours after mounting and maintain contractility induced by the high-K+ solution for many times, we suggest that the wire myograph system may be used for the time-consuming process of drug screening.

The wire myograph technique is used to investigate vascular smooth muscle functions and screen new drugs. We report a detailed protocol for measuring the isometric contractility of the mouse mesenteric artery and for screening new relaxants of vascular smooth muscle.

Myography 와이어를 사용 하 여 마우스 Mesenteric 동맥의 isometric 수축 측정

The wire myograph technique is used to assess the contractility of vascular smooth muscles in response to depolarization, GPCR agonists/inhibitors and ...

A Rat Carotid Artery Pressure-Controlled Segmental Balloon Injury with Periadventitial Therapeutic Application

Cardiovascular disease remains the leading cause of death and disability worldwide, in part due to atherosclerosis. Atherosclerotic plaque narrows the luminal surface area in arteries thereby reducing adequate blood flow to organs and distal tissues. Clinically, revascularization procedures such as balloon angioplasty with or without stent placement aim to restore blood flow. Although these procedures reestablish blood flow by reducing plaque burden, they damage the vessel wall, which initiates the arterial healing response. The prolonged healing response causes arterial restenosis, or re-narrowing, ultimately limiting the long-term success of these revascularization procedures. Therefore, preclinical animal models are integral for analyzing the pathophysiological mechanisms driving restenosis, and provide the opportunity to test novel therapeutic strategies. Murine models are cheaper and easier to operate on than large animal models. Balloon or wire injury are the two commonly accepted injury modalities used in murine models. Balloon injury models in particular mimic the clinical angioplasty procedure and cause adequate damage to the artery for the development of restenosis. Herein we describe the surgical details for performing and histologically analyzing the modified, pressure-controlled rat carotid artery balloon injury model. Additionally, this protocol highlights how local periadventitial application of therapeutics can be used to inhibit neointimal hyperplasia. Lastly, we present light sheet fluorescence microscopy as a novel approach for imaging and visualizing the arterial injury in three-dimensions.

The rat carotid artery balloon injury mimics the clinical angioplasty procedure performed to restore blood flow in atherosclerotic vessels. This model induces the arterial injury response by distending the arterial wall, and denuding the intimal layer of endothelial cells, ultimately causing remodeling and an intimal hyperplastic response.

쥐 경동맥 압력 제어 세그먼트 풍선 부상 과식 치료 응용 프로그램

Cardiovascular disease remains the leading cause of death and disability worldwide, in part due to atherosclerosis. Atherosclerotic plaque narrows the ...

Delayed Intramyocardial Delivery of Stem Cells after Ischemia Reperfusion Injury in a Murine Model

There is significant interest in the use of stem cells (SCs) for the recovery of cardiac function in individuals with myocardial injuries. Most commonly, cardiac stem cell therapy is studied by delivering SCs concurrently with the induction of myocardial injury. However, this approach presents two significant limitations: the early hostile pro-inflammatory ischemic environment may affect the survival of transplanted SCs, and it does not represent the subacute infarction scenario where SCs will likely be used. Here we describe a two-part series of surgical procedures for the induction of ischemia-reperfusion injury and delivery of mesenchymal stem cells (MSCs). This method of stem cell administration may allow for the longer viability and retention around damaged tissue by circumventing the initial immune response. A model of ischemia reperfusion injury was induced in mice accompanied by the delivery of mesenchymal stem cells (3.0 x 105), stably expressing the reporter gene firefly luciferase under the constitutively expressed CMV promoter, intramyocardially 7 days later. The animals were imaged via ultrasound and bioluminescent imaging for confirmation of injury and injection of cells, respectively. Importantly, there was no added complication rate when performing this two-procedure approach for SC delivery. This method of stem cell administration, collectively with the utilization of state-of-the-art reporter genes, may allow for the in vivo study of viability and retention of transplanted SCs in a situation of chronic ischemia commonly seen clinically, while also circumventing the initial pro-inflammatory response. In summary, we established a protocol for the delayed delivery of stem cells into the myocardium, which can be used as a potential new approach in promoting regeneration of the damaged tissue.

Stems cells are continuously investigated as potential treatments for individuals with myocardial damage, however, their decreased viability and retention within injured tissue can impact their long-term efficacy. In this manuscript we describe an alternative method for stem cell delivery in a murine model of ischemia reperfusion injury.

뮤린 모델에서 허혈혈 재관류 부상 후 줄기 세포의 지연 된 자궁 내 납품

There is significant interest in the use of stem cells (SCs) for the recovery of cardiac function in individuals with myocardial injuries. Most commonly, ...