2'-脱氧核苷在裸体小鼠中治疗鼠胚胎胸腺的肾下囊移植
Summary
我们提供一种简单而有效的方法,将治疗E18.5胸腺素的2’脱氧腺苷移植到裸鼠的肾胶囊中。该方法应辅助研究胸腺上皮细胞功能和T细胞成熟。
Abstract
胸腺是重要的中央免疫器官,在T细胞的发育和分化中起着至关重要的作用。胸腺移植是研究胸腺上皮细胞功能和T细胞在体内成熟的重要方法。在这里,我们将描述在我们的实验室中使用的实验方法,将2′-脱氧腺苷(以耗尽供体的淋巴细胞)治疗胚胎胸腺移植到贫血裸鼠的肾脏胶囊中。此方法既简单又高效,不需要特殊技能或设备。通过这一简单方法获得的结果表明,移植胸腺能有效支持受体的T细胞生产。此外,还将进一步阐明与议定书有关的若干要点。
Introduction
胸腺是中央免疫器官,胸腺胸腺细胞内经过正阴性选择,成为成熟的T细胞1,2。异常阳性或阴性选择分别导致免疫缺陷或自身免疫性疾病3,4。因此,胸腺器官移植是研究供体胸腺中T细胞选择过程的重要途径。这种方法在分析由基因突变介导的胸腺上皮功能时尤为重要,基因突变在突变5时引起胚胎致命表型。
为了研究受体的T细胞在移植胸腺中的成熟,有必要消耗胸腺内的供体淋巴细胞。为此,胚胎14天、15天或16天(E14,E15,E16)胸腺通常选择6,7。从更成熟的阶段胸腺也可以成功地耗尽捐赠者的淋巴细胞,通过治疗2′-脱氧腺苷。然而,关于消耗淋巴细胞和使用较老胸腺培养的详细方案之前没有描述8,9。虽然移植协议已被几个研究10,11引入,但进一步修改和改进这些协议是必要的。
我们的协议分为两部分:(i) 在含有2’脱氧腺苷的培养物中,通过培养物从晚期E18.5胸腺中消耗T淋巴细胞。(二) 将培养的胸腺移植到接受者体内。在此过程中,我们开发了一种简单的方法,将大组织(E18.5胸腺)输送到肾胶囊中,降低了肾损伤的几率。在关注后期胸腺的同时,我们的方案也可以直接用于或修改胸腺移植,用于不同发育阶段或其他类似大小的组织。
Protocol
所提出的方案符合暨南大学伦理委员会关于动物护理的指导方针。 注:所用材料列在”材料表”中。 1.胚胎胸腺的分离 在实验前对所有手术器械进行高压灭菌,用70%乙醇对工作台/机进行灭菌。 使用二氧化碳,麻醉和安乐死怀孕的雌性小鼠(成功交配后18.5天)。然后用70%乙醇擦拭腹部区域。注: 在这里,我们交配Insm1<sup…
Representative Results
这里我们展示的分离的E18.5胸腺包含两个完整的叶 (图1)。此外,我们显示头皮静脉针被剪切,形成输液管的斜面 (图 2)。接下来,我们还展示了在受体小鼠生长8周后移植在肾胶囊(图3A)和胸腺中所状的胸腺位置的代表性图像(图3B)。为了确定T细胞是否在移植胸腺的裸小鼠中产生,在移植的胸腺和外周血液中,我们使?…
Discussion
胚胎胸腺肾下囊移植是研究胸腺上皮细胞功能和T细胞在体内成熟过程的重要方法。虽然对胚胎胸腺器官培养和移植有若干实验性研究6,7,我们的方案提供了一个简单的替代程序,对小鼠胚胎胸腺培养和肾下囊移植较老的胸腺组织。
我们的协议通过合并几个不同的修改6,7,10,11来改进以前的协议。 …
Declarações
The authors have nothing to disclose.
Acknowledgements
这项工作得到了暨南大学对S.J.的启动包和中国广州科技项目(授权号201704020209至S.J.)的支持。我们感谢Amy Botta(多伦多约克大学生物学系,加拿大M3J 1P3)对手稿进行校对和编辑。
Materials
| 0.5% Povidone iodine | Shanghai Likang Distinfectant Hi-Tech Co.Ltd | 20171113 | |
| 0.9% Sodium Chloride Injection | Shandong Qilu Pharmaceuyical Co.Ltd | 2C17112101 | |
| 1 mL Sterile syringe | Solarbio | YA1090 | |
| 2’-Deoxyguanosine | MEC | HY-17563 | 1M in DMSO, 1:800 using (final 1.25mM) |
| 24 Well Plate | Corning Incorporated | Costar 3524 | |
| 4-0 Surgical suture needles with thread | NingBo Cheng-He Microsurgical Instruments Factory China | YY0166-2002 | |
| 60mm Cell Culture Dish | Corning Incorporated | 430166 | |
| 70% ETOH | LIRCON | 20181221 | |
| APC anti-mouse CD8a antibodies | Biolegend | 100711 | 1:100 |
| Bent-tip fine forceps, JZ 10 cm | Shanghai Medical Devices Group Co.,Ltd. | JD1060 | To sterilize before use |
| Cefmetazole Sodium for Injection | Sichuan Hexin Pharmaceutical co,Ltd | 17062111 079 | 6mg in 0.5ml 0.9% NaCl solution, 7.5ul/g body weight |
| Dissecting scissors, JZ 10 cm | Shanghai Medical Devices Group Co.,Ltd. | JC2303 | To sterilize before use |
| Fetal bovine serum (FBS） | GIBCO | 10270-106 | |
| Fine forceps, JZ 10 cm | Shanghai Medical Devices Group Co.,Ltd. | JD1050 | To sterilize before use |
| Flow cytometry | BD | FACSCanto II | |
| Flunixin meglumine | MACLIN | F810147 | 1mg in 1ml 0.9% NaCl solution,2ul/g body weight |
| Forceps, Dumont#5 | World Precision Instruments | 14098 | To sterilize before use |
| Infrared lamp | OTLAN | MT-810 | |
| Needle holder, JZ 14 cm | Shanghai Medical Devices Group Co.,Ltd. | J32010 | To sterilize before use |
| PE anti-mouse CD4 | Biolegend | 100511 | 1:100 |
| Penicillin-Streptomycin mixture | GIBCO | 15140122 | 1:100 |
| Pentobarbital sodium salt | Sigma | P3761 | 1.5% solution in PBS, 75ug/g body weight |
| RPMI1640 Medium | GIBCO | C14-11875-093 | |
| Scalp vein needle | Shanghai Kindly Medical Instruments Co., Ltd | XC001 | |
| Spring scissors | VANNAS | S11014-12 | To sterilize before use |
| stereomicroscope | OLYMPUS | SZ61 | |
| Sterile 15cm cotton swab | Guangzhou Haozheng | 20150014 | |
| Sterile gauze 5 cm x 7 cm-8P | Guangzhou Haozheng | 20172640868 | |
| Sterile PBS (1x) | GENOM | GNM20012 | |
| Tissue forceps, JZ 12.5 cm | Shanghai Medical Devices Group Co.,Ltd. | J41010 | To sterilize before use |
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Wang, J., Chen, G., Cui, Q., Song, E., Tao, W., Chen, W., Wang, C., Jia, S. Renal Subcapsular Transplantation of 2′-Deoxyguanosine-Treated Murine Embryonic Thymus in Nude Mice. J. Vis. Exp. (149), e59657, doi:10.3791/59657 (2019).