{"id":1099,"slug":"细胞冻存时间越长-活性是不是越差-存十年还有意义吗","question":"细胞冻存时间越长，活性是不是越差？存十年还有意义吗？","intent":"informational","language":"zh","url":"https://worldwiki.io/q/细胞冻存时间越长-活性是不是越差-存十年还有意义吗","entity":{"slug":"cell-banking","name":"Cell Banking","url":"https://worldwiki.io/entity/cell-banking"},"answer":{"short_answer":"一项覆盖2008至2025年研究的系统综述发现，解冻后SVF的活性总体上与新鲜组织相当，但冻存时间越长、酶消化时间越长，活性越低；储存温度本身影响不大。短期存储（少于1个月）并使用DMSO、海藻糖等冷冻保护剂时保存效果最好。该综述同时指出，行业仍缺少标准化流程和功能效力检测方法。","detailed_answer":"<p>综述提炼出的几个要点：</p><ul><li><strong>整体结论</strong>：解冻后SVF活性与新鲜组织大体相当。</li><li><strong>负面因素</strong>：冻存期越长、酶消化时间越长，活性下降越明显。</li><li><strong>影响较小的因素</strong>：储存温度本身影响不大（常规做法为液氮约零下196摄氏度）。</li><li><strong>保存最佳条件</strong>：短期（少于1个月）存储配合DMSO或海藻糖等冷冻保护剂。</li><li><strong>尚未解决</strong>：缺少标准化操作流程和功能效力检测方法，因此\"活性百分比\"在不同机构之间不一定可比。</li></ul><p>需要注意的是，上述文献讨论的是细胞活性，不等于临床疗效。</p>","format":"paragraph","confidence":75,"verified_at":null,"updated_at":"2026-09-20 17:11:10"},"sources":[{"id":263,"title":"Effects of Cryopreservation on Stromal Vascular Fraction Viability in Human Adipose Tissue: Insights from a Systematic Review (Farhana S et al., Tissue Eng Regen Med, DOI 10.1007/s13770-026-00833-1)","url":"https://www.ebi.ac.uk/europepmc/webservices/rest/search?query=EXT_ID:42631789%20AND%20SRC:MED&resultType=core&format=json","publisher":"Europe PMC / Tissue Engineering and Regenerative Medicine (Springer Nature)","type":"journal","accessed_at":"2026-09-19 18:00:31"}],"published_at":"2026-09-20 08:11:10"}