Andres Sandra, Bartling Babett, Stiensmeier Vera, Starke Alexander, Schmicke Marion
Institute of Agricultural and Nutritional Sciences, Animal Health Management, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany.
Department for Ruminants and Swine, Faculty of Veterinary Medicine, Leipzig University, Leipzig, Germany.
Front Vet Sci. 2023 Aug 8;10:1211135. doi: 10.3389/fvets.2023.1211135. eCollection 2023.
The isolation of primary hepatocytes from liver tissue of farm animals yields a very high number of cells, and a part of them can be stored by cryopreservation for future experiments. As no experience exists with the cryopreservation of hepatocytes from cattle, our study aimed at the cryopreservation of bovine hepatocytes by use of different protocols compared with the cryopreservation of hepatocytes from pig. We tested different freezing media (William's Medium E vs. University of Wisconsin solution), cryoprotectants (dimethyl sulfoxide with vs. without trehalose as additional additive), freezing systems (standard freezing container vs. controlled-rate freezer) and freezing times (4 vs. 28 d). These tests identified a general influence of species and freezing systems, whereas the influence of freezing media, trehalose additive and freezing time was less or not obvious. In this regard, we determined a mean recovery of 30% of bovine hepatocytes and 55% of porcine hepatocytes cryopreserved in a controlled-rate freezer, whereas the rates were about 10% less when hepatocytes were frozen in a standard freezing container. In accordance with this observation, the cultivation of cryopreserved hepatocytes from cattle was less effective than that of porcine hepatocytes. Hepatocytes from cattle can be successfully cryopreserved and partially cultured after cryopreservation but with lower percentage than porcine hepatocytes.
从农场动物的肝脏组织中分离原代肝细胞可获得大量细胞,其中一部分细胞可通过冷冻保存以备将来实验使用。由于目前尚无牛肝细胞冷冻保存的经验,我们的研究旨在通过使用不同方案冷冻保存牛肝细胞,并与猪肝细胞的冷冻保存进行比较。我们测试了不同的冷冻培养基(威廉姆斯E培养基与威斯康星大学溶液)、冷冻保护剂(添加与不添加海藻糖作为附加添加剂的二甲基亚砜)、冷冻系统(标准冷冻容器与程序降温冷冻仪)和冷冻时间(4天与28天)。这些测试确定了物种和冷冻系统的总体影响,而冷冻培养基、海藻糖添加剂和冷冻时间的影响较小或不明显。在这方面,我们确定在程序降温冷冻仪中冷冻保存的牛肝细胞平均复苏率为30%,猪肝细胞为55%,而在标准冷冻容器中冷冻肝细胞时,复苏率约低10%。根据这一观察结果,冷冻保存的牛肝细胞的培养效果不如猪肝细胞。牛肝细胞可以成功冷冻保存,并在冷冻保存后进行部分培养,但比例低于猪肝细胞。