وأيد البحوث التي أعلن عنها في هذا المنشور من قبل المعهد الوطني لالتهاب المفاصل والعضلات والعظام والأمراض الجلدية، وهو جزء من المعاهد الوطنية للصحة، في إطار جائزة R01-عدد AR063084. المحتوى هو فقط من مسؤولية الكتاب ولا تمثل بالضرورة وجهة النظر الرسمية للمعاهد الوطنية للصحة.

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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=Critical+appraisal+of+the+mouse+model+of+myocardial+infarction.">Critical appraisal of the mouse model of myocardial infarction.</a> Exp Physiol. 89, 497-505 (2004).</li><li>Shao, Y., Redfors, B., Omerovic, E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Modified+technique+for+coronary+artery+ligation+in+mice.">Modified technique for coronary artery ligation in mice.</a> J Vis Exp. , (2013).</li><li>Klocke, R., Tian, W., Kuhlmann, M. T., Nikol, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Surgical+animal+models+of+heart+failure+related+to+coronary+heart+disease.">Surgical animal models of heart failure related to coronary heart disease.</a> Cardiovasc Res. 74, 29-38 (2007).</li><li>Nossuli, T. O., 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+chronic+mouse+model+of+myocardial+ischemia-reperfusion:+essential+in+cytokine+studies.">A chronic mouse model of myocardial ischemia-reperfusion: essential in cytokine studies.</a> Am J Physiol Heart Circ Physiol. 278, 1049-1055 (2000).</li><li>Cozzi, E., 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=Ultrafine+particulate+matter+exposure+augments+ischemia-reperfusion+injury+in+mice.">Ultrafine particulate matter exposure augments ischemia-reperfusion injury in mice.</a> Am J Physiol Heart Circ Physiol. 291, 894-903 (2006).</li><li>Kim, S. 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=A+murine+closed-chest+model+of+myocardial+ischemia+and+reperfusion.">A murine closed-chest model of myocardial ischemia and reperfusion.</a> J Vis Exp. , 3896 (2012).</li><li>Nagarajan, V., Hernandez, A. V., Tang, W. 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الدكتور نوح يسليدر هو المؤسس والمسؤول العلمي في تريم edicine، وشركة

الماوس عضلة القلب نماذج نقص التروية، ضخه هي وسيلة فعالة لبحوث القلب والأوعية الدموية لمحاكاة السريرية أمراض القلب الحادة أو المزمنة 13،14. وقد تم تطبيق جهد كبير لتطوير وصقل النهج الجراحية التي تنتج الأحداث الدماغية وتلف ضخه في قلوب العديد من أنواع حيوانية مختلف...

النماذج الحيوانية من احتشاء عضلة القلب (MI) مهمة في مجال البحوث من الفيزيولوجيا المرضية المعقدة من مرض القلب الإقفاري 1. نقص التروية، ضخه (I / R) إصابة هو المساهم الرئيسي الضرر عضلة القلب ولدت خلال MI. إصابة نقص التروية الأولية التي تنتجها انسداد الشريان التاجي الدورة الدموية يمكن التقليل في مرضى MI عن طريق استخدام قسطرة لاستعادة التروية في الوقت المناسب. في حين أن هذا التدخل قد تقلص إلى حد كبير من عدد الوفيات بسبب MI الحادة، واستعادة تدفق الدم إلى المنطقة الدماغية النتائج في I / R الإصابة التي تؤدي إلى موت العضلية. هذا فقدان كتلة عضلة القلب يساهم في انخفاض النتاج القلبي والتقدم نحو قصور في القلب. وبالتالي، ودراسة الآليات التي تؤدي إلى الوفاة cardiomyocyte من I / R إصابة خط مهم جدا للتحقيق في البحوث القلب والأوعية الدموية. الجراحية ربط الشريان التاجي هو تقنية تجريبية مفيدة للحث على نماذج من MI في أنواع الحيوانات المختلفة، includiنانوغرام الفئران، والكلب والخنزير. أدخلت المنشورات في مختبرات مختلفة أساليب مختلفة بشأن إنشاء نموذج الفئران من القلب I / R 2،3 الإصابة. من أجل الحصول على نظرة ثاقبة هذه الآليات يجب علينا الحصول على النماذج الحيوانية الموثوق بها التي يمكن أن تتكاثر عدة جوانب MI علم الأمراض. تطوير مثل هذه النماذج أمر ضروري لاختبار النهج العلاجي لعلاج MI وما يرتبط بها من إصابة I / R أيضا. معظم التقنيات الجراحية المتاحة حاليا لمحاكاة MI في حيوانات التجارب تشمل تشريح الجراحية في تجويف الصدر لفضح الأمامي الأيسر النازل الشريان (LAD) الذي ثم المغطي من قبل ضمد لفترة محددة في الوقت المناسب لإنتاج هذا الحدث الدماغية. ثم أن ربطة يمكن إزالتها للسماح لضخه في المنطقة الدماغية وتوليد I / R الاصابة. أحد أوجه القصور الرئيسية لهذه النهج في أن الموقف من الأدب على LAD ليست دائما مستنسخة بدقة، والتييمكن أن يؤدي إلى الاختلاف في شدة MI الناجمة عن هذا النهج. معظم التقنيات المتاحة وصفها فقط عموما الموقع التقريبي للLAD في الجدار الأمامي للقلب. كما المتفرعة واتجاه LAD يمكن أن تختلف في الحيوانات الفردية الموقع ليست ثابتة دائما، ويمكن بسهولة الخلط بين 4،5، مما يؤدي إلى المضاعفات المحتملة أثناء الجراحة 6. يمكن للعواقب موضع غير لائق من ربطة تشغيلها من التباين في حجم احتشاء يتسبب في البطين الأيسر إلى المساس بخصوصية تماما للنموذج. ونحن هنا نقدم وسيلة لتعديل عضلة القلب I / R وربط دائم في الفئران التي تسمح لتحسين دقة وضع ربطة على LAD. من خلال تطبيق نهج محدد لشق الأولي وتشريح الداخلية، فضلا عن استخدام التلاعب لرفع الأذينين للسماح تقدير أفضل للLAD وموقع حيث يخرج من الشريان الأورطي. إنشاءموقف على LAD وأصله يتيح الفرصة لligate الفتى بطريقة استنساخه. هذا النموذج من عضلة القلب I / R وربط دائم يقلل ليس فقط الاختلاف في حجم احتشاء بعد الجراحة، ويمكن أيضا تقليل نسبة حدوث النزيف أثناء العملية.

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a murine model of myocardial ischemia-reperfusion injury through ligation of the left anterior descending artery

احتشاء عضلة القلب الحاد أو المزمن (MI) هي أحداث القلب والأوعية الدموية مما يؤدي إلى ارتفاع معدلات المراضة والوفيات. إنشاء آليات المرضية في العمل خلال MI وتطوير مناهج علاجية فعالة يتطلب منهجية لمحاكاة بتكاثر حالات السريرية وتعكس التغيرات المرضية في جسم المريض المرتبطة MI. هنا، نحن تصف طريقة جراحية للحث MI في نماذج الماوس التي يمكن استخدامها للمدى القصير نقص التروية، ضخه (I / R) إصابة وكذلك ربط دائمة. والميزة الرئيسية لهذه الطريقة هو تسهيل موقع اليسرى الأمامية تنازلي الشريان (LAD) للسماح لربط دقيق لهذا الشريان للحث على نقص التروية في البطين الأيسر من القلب الماوس. تحديد المواقع بدقة من ربطة على LAD يزيد استنساخ حجم احتشاء، وبالتالي يؤدي إلى نتائج أكثر موثوقية. سوف مزيد من الدقة في وضع ربطة تحسين النهج الجراحية القياسية لمحاكاة MI في الفئران، رHUS خفض عدد من حيوانات التجارب اللازمة للدراسات ذات الصلة إحصائيا وتحسين فهمنا للآليات إنتاج ضعف القلب التالية MI. هذا نموذج الفأر من MI مفيد أيضا لاختبار ما قبل السريرية من العلاجات التي تستهدف الضرر عضلة القلب MI التالية.

بعد 24 ساعة من ضخه، وتحليل حجم احتشاء والمنطقة المعرضة للخطر (AAR)، من خلال phthalo صبغة زرقاء وثلاثي فينيل كلوريد نتروبلو (TTC)، ربط من LAD يمكن التأكد من خلال مراقبة ابيضاض القاصي الأنسجة عضلة القلب إلى خياطة وكذلك اختلال وظيفي من الجدار الأمامي. يمكن التحقق من ضخه من عودة ال?...

Watch this Scientific Journal Video about A Murine Model of Myocardial Ischemia-reperfusion Injury through Ligation of the Left Anterior Descending Artery at JoVE.com

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

ونحن نقدم طريقة جراحية للحث التجريبية نقص التروية / ضخه (I / R) إصابة لمحاكاة احتشاء عضلة القلب (MI) في نماذج الماوس التي تسمح لمزيد من الوضوح في تحديد المواقع للربط على الشريان الأمامي الأيسر تنازلي (LAD) لزيادة التكاثر من التجارب MI في الفئران.

A الفئران نموذج من عضلة القلب إصابة نقص التروية، ضخه من خلال ربط الشريان الأمامي اليسار تنازليا

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

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Medicine

38.9K Views.  The Ohio State University.  ونحن نقدم طريقة جراحية للحث التجريبية نقص التروية / ضخه (I / R) إصابة لمحاكاة احتشاء عضلة القلب (MI) في نماذج الماوس التي تسمح لمزيد من الوضوح في تحديد المواقع للربط على الشريان الأمامي الأيسر تنازلي (LAD) لزيادة التكاثر من التجارب MI في الفئران. 

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

Permanent Ligation of the Left Anterior Descending Coronary Artery in Mice: A Model of Post-myocardial Infarction Remodelling and Heart Failure

Heart failure is a syndrome in which the heart fails to pump blood at a rate commensurate with cellular oxygen requirements at rest or during stress. It is characterized by fluid retention, shortness of breath, and fatigue, in particular on exertion. Heart failure is a growing public health problem, the leading cause of hospitalization, and a major cause of mortality. Ischemic heart disease is the main cause of heart failure.
Ventricular remodelling refers to changes in structure, size, and shape of the left ventricle. This architectural remodelling of the left ventricle is induced by injury (e.g., myocardial infarction), by pressure overload (e.g., systemic arterial hypertension or aortic stenosis), or by volume overload. Since ventricular remodelling affects wall stress, it has a profound impact on cardiac function and on the development of heart failure. A model of permanent ligation of the left anterior descending coronary artery in mice is used to investigate ventricular remodelling and cardiac function post-myocardial infarction. This model is fundamentally different in terms of objectives and pathophysiological relevance compared to the model of transient ligation of the left anterior descending coronary artery. In this latter model of ischemia/reperfusion injury, the initial extent of the infarct may be modulated by factors that affect myocardial salvage following reperfusion. In contrast, the infarct area at 24 hr after permanent ligation of the left anterior descending coronary artery is fixed. Cardiac function in this model will be affected by 1) the process of infarct expansion, infarct healing, and scar formation; and 2) the concomitant development of left ventricular dilatation, cardiac hypertrophy, and ventricular remodelling.
Besides the model of permanent ligation of the left anterior descending coronary artery, the technique of invasive hemodynamic measurements in mice is presented in detail.

Heart failure is the leading cause of hospitalization and a major cause of mortality. A model of permanent ligation of the left anterior descending coronary artery in mice is applied to investigate ventricular remodelling and cardiac dysfunction post-myocardial infarction. The technique of invasive hemodynamic measurements in mice is presented.

ربط دائم في الشريان التاجي الأيسر الأمامي تنازلي في الفئران: نموذج ما بعد إعادة تشكيل عضلة القلب احتشاء وقصور القلب

Heart failure is a syndrome in which the heart fails to pump blood at a rate commensurate with cellular oxygen requirements at rest or during stress. It ...

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.

نموذج الفئران من المعوية الإسكيمية-ضخه إصابة

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

A Mouse Model of Retinal Ischemia-Reperfusion Injury Through Elevation of Intraocular Pressure

Retinal ischemia-reperfusion (I/R) is a pathophysiological process contributing to cellular damage in multiple ocular conditions, including glaucoma, diabetic retinopathy, and retinal vascular occlusions. Rodent models of I/R injury are providing significant insights into mechanisms and treatment strategies for human I/R injury, especially with regard to neurodegenerative damage in the retinal neurovascular unit. Presented here is a protocol for inducing retinal I/R injury in mice through elevation of intraocular pressure (IOP). In this protocol, the ocular anterior chamber is cannulated with a needle, through which flows the drip of an elevated saline reservoir. Using this drip to raise IOP above systolic arterial blood pressure, a practitioner temporarily halts inner retinal blood flow (ischemia). When circulation is reinstated (reperfusion) by removal of the cannula, severe cellular damage ensues, resulting ultimately in retinal neurodegeneration. Recent studies demonstrate inflammation, vascular permeability, and capillary degeneration as additional elements of this model. Compared to alternative retinal I/R methodologies, such as retinal arterial ligation, retinal I/R injury by elevated IOP offers advantages in its&#160;anatomical specificity, experimental tractability, and technical accessibility, presenting itself as a valuable tool for examining neuronal pathogenesis and therapy in the retinal neurovascular unit.

This article describes a procedure for inducing retinal ischemia-reperfusion injury by elevated intraocular pressure in mice. Retinal ischemia-reperfusion injury by elevated intraocular pressure serves to model human pathologies characterized by compromised oxygen and nutrient delivery in the retina, enabling researchers to examine potential cellular mechanisms and treatments for human diseases of the retinal neurovascular unit.

نموذج الفأر من الشبكية الإسكيمية-ضخه إصابة خلال ارتفاع ضغط العين

Retinal ischemia-reperfusion (I/R) is a pathophysiological process contributing to cellular damage in multiple ocular conditions, including glaucoma, ...

Murine Left Anterior Descending (LAD) Coronary Artery Ligation: An Improved and Simplified Model for Myocardial Infarction

Ischemic heart disease (IHD), or acute coronary syndrome (ACS), is one of the leading causes of death in the United States. IHD is characterized by reduced blood supply to the heart, resulting in the loss of oxygen to and the ensuing necrosis of the heart muscle. The MI model has gained popularity for its use as a short-term ischemia-reperfusion model and a long-term permanent ligation model. Below, we describe a reliable method for the permanent ligation of the LAD. With mouse genetic engineering technology becoming more advanced, and with an increasing availability of quality murine surgical instruments, the mouse has become a popular model for MI surgeries. Our surgical model incorporates the use of an easily reversible anesthetic for the rapid recovery of the mouse; a minimally invasive endotracheal intubation without involving a tracheotomy; and a thoracentesis through the original thoracotomy site without creating an additional incision in the chest, as is done in some other methods, to effectively remove excess blood and air from the chest cavity. This method is comparatively less invasive than other methods, which dramatically reduces surgical and post-surgical complications and mortality and improves reproducibility.

Murine Left Anterior Descending LAD Coronary Artery Ligation: An Improved and Simplified Model for Myocardial Infarction

We provide a reliable method for left anterior descending artery (LAD) ligation in a mouse model. This method is comparatively less invasive than other methods, involving endotracheal intubation, a left-sided thoracotomy approach, and thoracentesis. This method can be used as a model for both acute and chronic myocardial infarction (MI).

الفئران اليسار الأمامي تنازلي (LAD) التاجي ربط الشريان: نموذج تحسين والمبسطة لاحتشاء عضلة القلب

Ischemic heart disease (IHD), or acute coronary syndrome (ACS), is one of the leading causes of death in the United States. IHD is characterized by ...

Evaluation of Coronary Flow Reserve After Myocardial Ischemia Reperfusion in Rats

Coronary artery disease is the leading cause of death worldwide. After an acute myocardial infarction, early and successful myocardial intervention via recanalization of the coronary artery is the most effective strategy for reducing the size of ischemic myocardium. The coronary microvasculature cannot be visualized and imaged&#160;in vivo, but there are several invasive and noninvasive techniques that can be used to assess parameters which depend directly on coronary microvascular function. The endothelial function after ischemia reperfusion can be assessed also at the level of the coronary circulation via the coronary flow reserve (CFR).&#160;In this study, peak velocity of left anterior descending (LAD) coronary arteries was measured in rats in vivo via Transthoracic Doppler Echocardiography during resting and stress challenge (induced by Dobutamine). A normal heart can increase its coronary blood flow up to four times above the resting values during stress induction. Following ischemia reperfusion, we found a significantly diminished CFR, which can be used as a marker of coronary microvascular dysfunction. CFR has opened a window on the importance of microvascular dysfunction and has been shown to predict cardiovascular risk independent of whether the severe obstructive disease is present.

Coronary flow reserve (CFR), is defined as the ratio of maximal coronary blood flow to the resting coronary blood flow. We present a protocol for evaluating CFR in rats via ultrasound, which offers the opportunity to predict cardiovascular risk factors in the absence of obstructive coronary disease.

تقييم احتياطي التدفق التاجي بعد إعادة ضخ الإقفارية عضلة القلب في الفئران

Coronary artery disease is the leading cause of death worldwide. After an acute myocardial infarction, early and successful myocardial intervention via ...

Murine Myocardial Infarction Model using Permanent Ligation of Left Anterior Descending Coronary Artery

Myocardial infarction (MI) and acute coronary diseases are among the most prominent causes of death in population with western lifestyle. The murine models of MI with permanent ligation of left-anterior descending (LAD) coronary artery closely mimics MI in humans. Murine models benefit from the extensive genetic engineering available nowadays. Here we propose a reproducible murine surgical model of myocardial infarction by permanent LAD coronary ligation. Our technique comprises anesthesia with ketamine/xylazine that can be rapidly reversed by administration of an antagonist, intubation without tracheotomy for mechanical-assisted ventilation, ventilation with application of extrinsic positive end-expiratory pressure (PEEP) to avoid alveolar collapse, a thoracotomy method limiting to the minimum surgical lesions made to skeletal muscles, and lung inflation without thoracentesis. This method is sparsely invasive, reproducible and reduces post-surgery mortality and complications.

Herein we describe a surgical procedure showing how to achieve permanent ligation of the left-anterior descending coronary artery in mice. This model is of high relevance to investigate the pathophysiology of myocardial infarction and the concomitant biological processes.

نموذج احتشاء عضلة القلب Murine باستخدام الربط الدائم للشريان التاجي الأمامي الأيسر

Myocardial infarction (MI) and acute coronary diseases are among the most prominent causes of death in population with western lifestyle. The murine ...

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.

تأخر التسليم داخل القلب للخلايا الجذعية بعد إصابة إعادة ضخ الإقفاري في نموذج مورين

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

A Rat Lung Transplantation Model of Warm Ischemia/Reperfusion Injury: Optimizations to Improve Outcomes

From our experience with rat lung transplantation, we have found several areas for improvement. Information in the existing literature regarding methods for choosing appropriate cuff sizes for the pulmonary vein (PV), pulmonary artery (PA), or bronchus (Br) are varied, thus making the determination of proper cuff size during rat lung transplantation an exercise of trial and error. By standardizing the cuffing technique to use the smallest effective cuff appropriate for the size of the vessel or bronchus, one can make the transplantation procedure safer, faster, and more successful. Since diameters of the PV, PA, and Br are related to the body weight of the rat, we present a strategy to choosing an appropriate size using a weight-based guide. Since lung volume is also related to body weight, we recommend that this relationship should also be considered when choosing the proper volume of air for donor lung inflation during warm ischemia as well as for the proper volume of PBS to be instilled during bronchoalveolar lavage (BAL) fluid collection. We also describe methods for 4th intercostal space dissection, wound closure, and sample collection from both the native and transplanted lobes.

Here, we present optimizations to a rat lung transplantation model that serve to improve outcomes. We provide a size guide for cuffs based on body weight, a measurement strategy to ascertain the 4th intercostal space, and methods of wound closure and BAL (bronchoalveolar lavage) fluid and tissue collection.

نموذج زرع رئة الفئران لإصابة نقص التروية / التروية الدافئة: تحسينات لتحسين النتائج

From our experience with rat lung transplantation, we have found several areas for improvement. Information in the existing literature regarding methods ...

Induction of Myocardial Infarction and Myocardial Ischemia-Reperfusion Injury in Mice

Acute myocardial infarction is a common cardiovascular disease with high mortality. Myocardial reperfusion injury can counteract the beneficial effects of heart reflow and induce secondary myocardial injury. A simple and reproducible model of myocardial infarction and myocardial ischemia-reperfusion injury is a good tool for researchers. Here, a customizable method to create a myocardial infarction (MI) model and MIRI by precision ligation of the left anterior descending coronary artery (LAD) through micromanipulation is described. Accurate and reproducible ligature positioning of the LAD helps obtain consistent results for heart injury. ST-segment changes can help to identify model accuracy. The serum level of cardiac troponin T (cTnT) is used to assess the myocardial injury, cardiac ultrasound is employed to evaluate the myocardial systolic function, and Evans-Blue/triphenyl tetrazolium chloride staining is used to measure infarct size. In general, this protocol reduces procedure duration, ensures controllable infarct size, and improves mouse survival.

Here we describe a simple and reproducible method that can induce myocardial infarction or myocardial ischemia-reperfusion injury in mice by precision ligation of the left anterior descending coronary artery through micromanipulation.

تحريض احتشاء عضلة القلب وإصابة نقص تروية عضلة القلب في الفئران

Acute myocardial infarction is a common cardiovascular disease with high mortality. Myocardial reperfusion injury can counteract the beneficial effects of ...

Left Coronary Artery Ligation: A Surgical Murine Model of Myocardial Infarction

Ischemic heart disease and subsequent myocardial infarction (MI) is one of the leading causes of mortality in the United States and around the world. In order to explore the pathophysiological changes after myocardial infarction and design future treatments, research models of MI are required. Permanent ligation of the left coronary artery (LCA) in mice is a popular model to investigate cardiac function and ventricular remodeling post MI. Here we describe a less invasive, reliable, and reproducible surgical murine MI model by permanent ligation of the LCA. Our surgical model comprises of an easily reversible general anesthesia, endotracheal intubation that does not require a tracheotomy, and a thoracotomy. Electrocardiography and troponin measurement should be performed to ensure MI. Echocardiography at day 28 after MI will discern heart function and heart failure parameters. The degree of cardiac fibrosis can be evaluated by Masson's trichrome staining and cardiac MRI. This MI model is useful for studying the pathophysiological and immunological alterations after MI.

Presented here is a surgical procedure for permanent ligation of the left coronary artery in mice. This model can be used to investigate the pathophysiology and associated inflammatory response after myocardial infarction.

ربط الشريان التاجي الأيسر: نموذج الفئران الجراحي لاحتشاء عضلة القلب

Ischemic heart disease and subsequent myocardial infarction (MI) is one of the leading causes of mortality in the United States and around the world. In ...