[摘要] 目的 大鼠胸腺以豚鼠骨髓間充質干細胞進行修飾,然后行豚鼠到大鼠的異種心臟移植。研究以間充質干細胞修飾胸腺對異種移植心臟存活時間的影響。 方法 供體豚鼠和受體SD大鼠各20只隨機分成四組,A組(對照組);B組(胸腺修飾IT組);C組(CVF組);D組(IT加CVF組)。觀測指標:移植心臟存活時間,病理變化,供受體異種淋巴細胞毒性試驗。 結果 供心平均存活時間:A組(23.20±6.14)min,B組(24.20±9.28)min,C組(335.40±49.23)min,D組(451.00±50.10)min。A與B組兩組比較,差異無統計學意義(P>0.05)。C、D組平均存活時間較A、B明顯延長,差異有統計學意義(P<0.05)。D組與C組組間比較差異有統計學意義(P<0.05)。供受體淋巴細胞反應,測得光密度值分別為:D組為(381.20±12.01),A組為(590.20±15.38),胸腺修飾組明顯低于對照組,差異有統計學意義(P<0.05)。 結論 豚鼠到大鼠心臟異種移植中,豚鼠MSCs修飾大鼠胸腺,當克服HAR后可以延長供心存活時間,但并不能完全克服AVR的發生。
[關鍵詞] 胸腺修飾;異種心臟移植;免疫耐受;骨髓間充質干細胞
[中圖分類號] R392.4;R654.2 [文獻標識碼] A [文章編號] 2095-0616(2012)21-35-04
Effect of intrathymic inoculation to cardiac xenograft rejection with mesenchymal stem cells
ZHU Zhen1 SHEN Zhenya1 CHEN Haijun2
1.Department of Cardiothoracic Surgery, the First Affiliated Hospital of Soochow University, Suzhou 215006,China;2. Department of Thoracic Surgery, the Affiliated Kunshan Hospital of Nanjing University of Traditional Chinese Medicine, Kunshan 215300, China
[Abstract] Objective To investigate the effect of intrathymic inoculation with guinea pig's MSCs on the discordant rodent cardiac xenograft in the model of guinea pig to rat xenotransplantation. Methods Donor (twenty guniea pigs) and recipient (twenty SD rats) were randomly divided into four groups, including group A (control group), group B (IT group), group C (CVF group), group D (CVF plus IT inoculation with MSCs group).The guinea pig's grafted heart mean survival time, the optical density of mixed cell reaction and the pathology were observed. Results MST of group A was (23.20±6.14)min, group B was (24.20±9.28)min, group C was (335.40±49.23)min, and group D was (451.00±50.10)min. The difference between group A and group B was not statistically significant (P>0.05).Group C and group D were significantly longer than that of group A and group B(P<0.05). The difference of MST was statistically significant in group D and group C (P<0.05).The results of MCR of group IT was (381.20±12.01). Control group was (590.20±15.38). The optical density of group IT was much lower than control group (P<0.05). Conclusion Intrathymic inoculation with MSCs of guinea pig can prolong the survival time of xenoheart by using Chinese cobra venom factor.
[Key words] Intrathymic inoculation; Cardiac xenotransplantaion; Immunotolerance; Bone mesenchymal stem cells
選用豚鼠到大鼠心臟異位移植模型作為實驗模型。目前超急性排異反應(HAR)已能被中華眼鏡蛇毒因子(CVF)所克服,急性血管性排斥反應(AVR)是目前異種移植所面臨的主要問題。本研究通過間充質干細胞修飾胸腺來研究該方法對AVR的影響,以了解此方法對異種移植的影響。
1 材料與方法
1.1 主要試劑
Ficoll淋巴細胞分離液(SIGMA公司);DMEM培養液,胎牛血清(FBS,美國Gibco公司);中華眼鏡蛇毒因子(CVF)(昆明倍捷公司);CCK-8細胞計數試劑盒(日本同仁化學研究所)。
1.2 手術材料
二氧化碳培養箱(Heraeus.BB 5060);8-0無創傷縫線(上海浦東金環醫療用品有限公司);……