三种小体积肝移植大鼠模型的比较

目的 通过对三种供肝选取方法的比较来探索更简便、稳定的小体积肝移植大鼠模型的建立方法.方法 以Kamada"二袖套"法非动脉化原位大鼠肝移植模型为基础,采取供肝冷灌洗后原位剪除肝叶的方法获取供肝,建立小体积肝移植模型,Ⅰ组以肝中叶作为供肝,Ⅱ组以肝右中叶+右叶作为供肝,Ⅲ组以肝中叶+右叶作为供肝,其中Ⅰ组及Ⅱ组供、受者体重相似,Ⅲ组供者体重比受者轻100～120 g.比较3个组的手术成功率、手术各阶段耗时、术后肝功能以及移植肝组织损伤、排斥反应发生、手术并发症和受者存活情况.结果 Ⅲ组肝叶剪除时间为(8.8±0.7)min,明显短于Ⅱ组的(11.5±1.1)min和Ⅰ组的(10.1±1.0)min(P＜0.01).3个组供肝冷缺血时间、无肝期及受者手术耗时等方面的差异无统计学意义.Ⅲ组肝断面出血和胆漏并发症显著少于Ⅰ组和Ⅱ组;Ⅰ组肝后下腔静脉狭窄及血栓形成明显多于Ⅱ组和Ⅲ组(P＜0.05).3组间术后第1、7天血清丙氨酸转氨酶、胆红素总量和血氨水平的差异无统计学意义.术后第7天,3组间肝损伤及排斥反应分级(Banff分级均为轻度)的差异均无统计学意义.Ⅰ组、Ⅱ组和Ⅲ组的手术成功率分别为80%、85%和85%,3组间的差异无统计学意义.Ⅲ组的7 d存活率为62.5%,高于Ⅰ组的42.9%和Ⅱ组的47.5%,但3组间的差异无统计学意义.Ⅲ组的存活时间为(12.0±2.3)d,长于Ⅰ组的(6.0±0.9)d和Ⅱ组的(7.0±1.3)d,但差异均无统计学意义.结论 采用肝中叶+右叶供肝和供者体重低于受者100～120 g的方案能够简便、快捷的建立稳定的30%小体积肝移植大鼠模型,而且能显著减少肝切除相关并发症.

Abstract：

Objective To explore a simple and effective way of establishing a 30 % small-forsize liver transplantation in rats. Methods SD rats were selected as the donors and recipients. Smallfor-size orthotopic live transplantation was performed using Kamada's two-cuff method. Donor's liver was flushed via abdominal aorta and hepatectomy in situ was done. Animals were divided into 3 groups (40 pairs of rats in each): group Ⅰ , median lobe was used as graft; group Ⅱ, right of median lobe and right lobe were used as graft; group Ⅲ, median and right lobes were used as graft. The body weight of the donor was the same as the recipient in groups Ⅰ and Ⅱ , but 100～ 120 g less than in group Ⅲ. The operating time, 7-day survival and technical complications were compared among these 3 groups. Results The operating time of hepatectomy was shorter in group Ⅲ than in groups Ⅰ and Ⅱ (8. 8±0.7 vs 11.5± 1.1 vs 10.1 ±1.0 min, P＜0.01). The cold ischemia time of graft, the anhepatic time, the operating time of recipient and the transplanting successful rate showed no significant difference among the 3 groups. Compared with groups Ⅰ and Ⅱ , the incidence of bleeding,bile leakage and IVC stricture was significantly decreased in group Ⅲ (P＜0. 05). Other complications after operation showed no significant difference among the 3 groups (P＞0. 05). Group Ⅲ had more 7-days survivors and longer median survival time, but there was no significant difference among the 3groups. Conclusion Small for donor body weight with median and right lobes as graft was a more effective and simple way of establishing a 30 % small-for-size liver transplantation in rats with shorter hepatectomy time and less complications after operation.

Liver transplantation in rats using 3 methods of small-for-size grafts

Objective To explore a simple and effective way of establishing a 30 % small-forsize liver transplantation in rats. Methods SD rats were selected as the donors and recipients. Smallfor-size orthotopic live transplantation was performed using Kamada's two-cuff method. Donor's liver was flushed via abdominal aorta and hepatectomy in situ was done. Animals were divided into 3 groups (40 pairs of rats in each): group Ⅰ , median lobe was used as graft; group Ⅱ, right of median lobe and right lobe were used as graft; group Ⅲ, median and right lobes were used as graft. The body weight of the donor was the same as the recipient in groups Ⅰ and Ⅱ , but 100～ 120 g less than in group Ⅲ. The operating time, 7-day survival and technical complications were compared among these 3 groups. Results The operating time of hepatectomy was shorter in group Ⅲ than in groups Ⅰ and Ⅱ (8. 8±0.7 vs 11.5± 1.1 vs 10.1 ±1.0 min, P＜0.01). The cold ischemia time of graft, the anhepatic time, the operating time of recipient and the transplanting successful rate showed no significant difference among the 3 groups. Compared with groups Ⅰ and Ⅱ , the incidence of bleeding,bile leakage and IVC stricture was significantly decreased in group Ⅲ (P＜0. 05). Other complications after operation showed no significant difference among the 3 groups (P＞0. 05). Group Ⅲ had more 7-days survivors and longer median survival time, but there was no significant difference among the 3groups. Conclusion Small for donor body weight with median and right lobes as graft was a more effective and simple way of establishing a 30 % small-for-size liver transplantation in rats with shorter hepatectomy time and less complications after operation.