Question Detail
For animal experiments, is a DMSO concentration of 10% or 5% more appropriate for rat liver tissue cryopreservation solution?
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All Answers4
宋
宋磊强6787
2026-09-22
如果下游要做石蜡切片或HE/免疫组化，DMSO残留可能影响固定和染色质量。冻存组织复苏后建议用含10%～20%血清的培养基或预冷PBS充分洗涤，再进行固定或下游实验。配冻存液时血清和DMSO混合会放热，需要在冰上缓慢加DMSO，避免局部高温损伤蛋白。10% DMSO本身不是影响病理的唯一因素，冻存前取材、切片厚度和程序降温也会影响结果。
L
Lily
2026-09-16
组织冻存用量一般不大，建议买50～100mL细胞培养级DMSO，性价比比500mL大瓶更合适。大瓶虽然单价低，但冻存液用量少，开封后吸潮和污染风险会抵消价差。小包装到货后可直接分装成2～5mL无菌冻存管，每管对应一次实验。比价时按实际可用mL数算，把分装耗材、手套箱或干燥保存成本也考虑进去。
B
Bioer
2026-09-13
肝组织冻存用10% DMSO加含血清培养基更常见，尤其大鼠肝组织块较大，5% DMSO可能渗透和抗冰晶能力不足。如果担心10%对病理切片影响，建议把肝切成1～2mm厚的小条，保证冻存液渗透，复苏后立即用预冷PBS或培养基洗2～3次再固定。也可同一批样本分5%和10%两组对比，看细胞核形态和冰晶空泡，用数据决定，不要凭经验一刀切。
E
Emma
2026-07-07
DMSO吸潮确实是常见问题，开封后接触空气会吸水和氧化，长期开口瓶可能颜色变深、水分升高。建议到货后在干燥环境中分装，动作快一些；分装后拧紧密闭，放干燥器或阴凉处。DMSO在18℃左右会凝固，放冰箱后取用需室温融化，反复冻融会让管壁产生冷凝水，所以更应分装小管，不要整瓶反复冻融。
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