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Method Article
细胞膜棚微粒(MPS)是活性生物囊泡可以分离和它们的病理生理作用研究了各种模型。在这里,我们描述了从生成T淋巴细胞(的LMP)得出国会议员和展示他们对气道上皮细胞凋亡作用的方法。
在细胞 - 细胞通讯细胞膜衍生囊泡的生物角色的兴趣,近年来已增加。微粒(MPS)是一种这样的类型的小泡,直径范围为0.1微米至1微米,并且通常从真核细胞进行活化或凋亡的质膜棚。在这里,我们描述了从凋亡的CEM T细胞与放线菌素D的LMP是通过一个多步差速离心处理分离和表征使用流式细胞术刺激的T淋巴细胞衍生的微粒(的LMP)的生成。该协议也为展示的LMP对小鼠原发性呼吸支气管组织植源性支气管上皮细胞凋亡的作用原位细胞死亡检测方法。本文描述的方法在体外分离量的LMP丰富的淋巴细胞凋亡提供了可重复的过程。 LMP的派生以这种方式可以用来评价各种疾病模型的特征,并为药理学和毒理学试验。鉴于气道上皮提供外部环境和下面的组织之间的保护物理和功能障碍,使用支气管组织的外植体,而不是永生化上皮细胞系提供了有效的模型用于要求气道组织的调查。
Microparticles (MPs) are biologically active submicron membrane vesicles released following cell activation or apoptosis. MPs are derived from both healthy and damaged cells and are implicated in many physiological and pathological processes.1 MPs have been detected not only in human plasma, but also in inflammatory and apoptotic tissue. The biological utility of cell membrane–derived MPs has been demonstrated in various settings, including cell signalling models and as pharmacological tools.2,3 We previously demonstrated that LMPs derived from T lymphocytes following actinomycin D stimulation (to induce apoptosis) suppress angiogenesis and inhibit endothelial cell survival and proliferation.4,5 The antiangiogenic effects of LMPs may vary significantly depending on the stimuli used to activate T lymphocytes in vitro.6
The airway epithelium functions as a protective physical and functional barrier. Increased numbers of T lymphocytes in the airway can contribute to cell damage and airway inflammation.7 We have shown that LMPs induce apoptosis of human bronchial epithelial cells,8 which indicated LMPs may change barrier function of bronchial epithelium in vivo. Apoptotic cells can be identified using the TUNEL method, which detects in situ DNA fragmentation.
The overall goal of this protocol is to illustrate the in vitro production of LMPs from a T lymphocyte cell line, and to demonstrate their proapoptotic effect on airway epithelial cells. In situ cell death detection demonstrated that LMPs strongly induce airway bronchial epithelial cell death, suggesting that LMPs-mediated injury to the airway epithelium may impact barrier function of the damaged epithelium.
注:雄性C57BL / 6小鼠(5-7周龄)从查尔斯河实验室国际公司(ST-恒,魁北克,加拿大),并根据批准的朱圣 - 海宁动物护理委员会的协议操作。小鼠支气管组织的外植体用于研究的LMP的上皮细胞上的促凋亡效应提供初级支气管上皮细胞的良好来源。这个协议描述了在体外产生的LMP的,以及用于检测对LMP的治疗支气管组织的外植体凋亡的上皮细胞的方法。该协议包括3个部分。
1.生产的LMP与表征
注意:为防止污染,确保在这个实验中使用的所有材料是无菌的或高压灭菌。执行所有的步骤,在RT在生物安全柜无菌条件下,除非另有说明。
1.1)刺激和收集的国会议员9
国会议员1.2),通过流式细胞仪分析4表征
1.3)测定MP P的rotein浓度(Bradford法)
2.支气管组织植和治疗的LMP
注:要特别注意无菌的工作环境,无菌准备在下面的实验中使用的解决方案和媒介。准备完全愈合中,加入1毫升组织愈合中补充与血清(解冻冰)至100毫升组织愈合中拌匀。
2.1)准备支气管组织植
2.2)的LMP治疗
3.组织病理学检查
3.1)准备了以下解决方案之前,进行下一个步骤
3.3),HE染色(H&E)染色
3.4) 原位细胞凋亡检测:TUNEL法
通过荧光激活细胞分选(FACS)分析,并使用1微米的小珠,其中国会议员(≤1微米)的97%的人膜联蛋白-V-Cy5的阳性门控的LMP进行表征与膜联蛋白V染色10( 图1A和1B)。通常情况下,的LMP为约2.5毫克,得到下列该协议。从C57BL支气管组织的外植体/ 6小鼠进行车辆和的LMP治疗。支气管切片的组织病理学分析揭示的LMP对支气管上皮细胞的结构完整性的影响。在对照外植体,细支气管...
国会议员是细胞间串扰活性介质和他们的研究是有希望在科学的许多领域。11本研究中提出的体外大规模发电的LMP从凋亡T细胞系衍生的详细协议。这些国会议员表达细胞分子的大型剧目,并且生物牵连的细胞和组织稳态的调节。然而,LMP的源于不同来源可能是生物学上不同。4,9,12,13
的LMP显示根据用于生成它们在体外刺激和从它们所衍生自的细胞?...
作者什么都没有透露。
视力保健研究网络 - 这项工作是由卫生研究所(178918),全宗德RECHERCHE连接桑特魁北克的加拿大学院资助。
Name | Company | Catalog Number | Comments |
LMPs production and characterization | |||
CEM T cells | ATCC | CCL-119 | |
X-VIVO 15 medium | Cambrex, Walkersville | 04-744Q | |
Flask T75 | Sarstedt | 83.1813.502 | |
Flask T175 | Sarstedt | 83.1812.502 | |
Actinomycin D | Sigma Chemical Co. | A9415-2mg | |
PBS | Lifetechnologies | 14190-144 | |
0.22 µm filter | Sarstedt | 83.1826.001 | |
Annexin-VCy5 | BD Pharmagen | 559933 | |
FACS flow solution | BD Bio-sciences | 342003 | |
Fluorescent microbeads (1 µm) | Molecular Probes | T8880 | |
Polysterene counting beads (7 µm) | Bangs laboratories | PS06N/6994 | |
Polypropylene FACS tubes | Falcon | 352058 | |
1 ml pipet | Fisher | 13-678-11B | |
5 ml pipet | Falcon | 357543 | |
25 ml pipet | Ultident | DL-357551 | |
1.5 ml conical polypropylene micro tube | Sarstedt | 72.690 | |
15 ml conical polypropylene tube | Sarstedt | 62.554.205 | |
50 ml conical polypropylene tube | Sarstedt | 62.547.205 | |
50 ml high speed polypropylene copolymer tube | Nalgene | 3119-0050 | |
250 ml high speed polypropylene bottle | Beckman | 356011 | |
Protein assay (Bradford assay) | Bio-Rad Laboratories | 500-0006 | |
Protein assay standard II | Bio-Rad Laboratories | 500-0007 | |
Test tube 16 x 100 | VWR | 47729-576 | |
Test tube 12 x 75 | Ultident | 170-14100005B | |
Cell incubator | Mandel | Heracell 150 | |
Low speed centrifuge | IEC | Centra8R | |
High speed centrifuge | Beckman | Avanti J8 | |
High speed rotor for 250ml bottle | Beckman | JLA16.250 | |
High speed rotor for 50ml tube | Beckman | JA30.50 | |
Fow cytometry | BD Bio-sciences | FACS Calibur | |
Spectrophotometer | Beckman | Series 600 | |
Bronchial tissue explants and sections | |||
C57BL/6 mice (5-7 weeks old) | Charles River Laboratories, Inc. | ||
Mouse Airway PrimaCell™ System: | CHI Scientific, Inc. | 2-82001 | |
Rib-Back Carbon Steel Scalpel Blades | Becton Dickinson AcuteCare | 371310 | #10 |
Scalpel Handle | Fine Science Tools Inc. | 10003-12 | #7 |
phase-contrast inverted microscope | Olympus Optical CO., LTD. | CK2 | |
high O2 gas mixture | VitalAire Canada Inc. | ||
modular incubator chamber | Billups-Rothenberg Inc. | MIC-101 | |
MaxQ 4000 incubated orbital shaker | Barnstead Lab-Line, | SHKA4000-7 | |
12-well tissue culture plate | Becton Dickinson and Company | 353043 | |
Plastic tissue culture dishes (100 mm) | Sarstedt, Inc. | 83.1802 | |
Surgical scissors | Fine Science Tools Inc. | 14060-09 | Straight, sharp, 9cm longth |
Half-curved Graefe forceps | Fine Science Tools Inc. | 11052-10 | |
humidified CO2 incubator | Mandel Scientific Company Inc. | SVH-51023421 | |
Histopathological examination | |||
formalin formaldehyde | Sigma-Aldrich, Inc. | HT5011 | |
paraffin | Fisher scientific International, Inc. | T555 | |
ethyl alcohol | Merck KGaA, Darmstadt | EX0278-1 | |
glutaraldehyde | Sigma-Aldrich, Inc. | G6403 | |
Cacodylate | Sigma-Aldrich, Inc. | 31533 | |
microscope slides | VWR Scientific Inc. | 48300-025 | 25x75 mm |
Xylene | Fisher scientific International, Inc. | X5-4 | |
Mayer's hematoxylin | Sigma-Aldrich, Inc. | MHS16 | Funnel with filter paper |
HCl | Fisher scientific International, Inc. | A144s-500 | |
eosin | Sigma-Aldrich, Inc. | HT110116 | Funnel with filter paper |
Permount™ Mounting Medium | Thermo Fisher Scientific Inc. | SP15-100 | |
glass coverslip | surgipath medical industries, Inc. | 84503 | 24×24 #1 |
TUNEL detection kit | In Situ Cell Death Detection, POD | 11 684 817 910 | |
oven | Despatch Industries Inc. | LEB-1-20 | |
rotary Microtome | Leica Microsystems Inc. | RM2145 | |
filter paper | Whatman International Ltd. | 1003150 | #3 |
Microscope | Nikon Imaging Japan Inc. | E800 | |
staining dish complete | Wheaton Industries, Inc. | 900200 | including dish, rack, cover |
1.5 ml eppendorf tube | Sarstedt Inc. | 72.69 | 39x10 mm |
Orbital and Reciprocating Water Bath | ExpotechUSA | ORS200 | |
phosphate buffered saline | GIBCO | 14190-144 | |
fume hood | Nicram RD Service | 3707E |
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