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What is the appropriate safe concentration of DMSO as a solvent for intraperitoneal injection in animal experiments using mice?

Lab Techniques
Asked by:郑杰7662 2026-07-31 Views 248 4 answers
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Tony 2026-09-10
小鼠腹腔注射DMSO的最高耐受浓度没有统一标准,一般溶剂终浓度建议控制在5%以下。很多实验室单次给药用到2%~5%问题不大,连续给药时最好降到2%左右。5%不是绝对不能,但要控制给药体积并设置同浓度溶剂对照。建议先配浓溶液,再用生理盐水或缓冲液稀释到DMSO≤5%。若小鼠出现弓背、腹膜炎、活动减少等表现,应降低浓度或换用PEG400、环糊精等助溶剂。
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Nina1485 2026-09-10
动物房用药用DMSO建议保持无菌。细胞培养级DMSO出厂一般经过除菌过滤,但开瓶后分装和使用过程可能污染。可在生物安全柜中用无菌注射器和0.22μm滤器过滤分装到无菌聚丙烯冻存管;滤器要确认膜材质耐受DMSO。分装后每管一次用量,避免反复穿刺同一瓶。若直接使用原瓶,建议只用于短期实验,并严格无菌操作。
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Andy 2026-09-11
细胞培养级DMSO 100mL如果是常用品牌且有本地库存,货期通常1~3个工作日;需要从厂家调货或小批量分装可能1~2周。采购时不要只看品牌,建议向供应商索要批次COA,确认低内毒素、水分和细胞培养级标示。动物房大批量使用可一次买2~3瓶,但到货后及时分装,避免整瓶反复开盖。货期最好让销售书面确认,别等到给药前一天才下单。
飞
飞飞小白 2026-09-12
如果5% DMSO在药效模型里引起刺激,可先考虑降低到2%~3%,因为DMSO助溶后可用水性缓冲液进一步稀释。也可以采用共溶剂体系,如DMSO+PEG400+生理盐水,或加入少量Tween80,但需验证化合物析出和活性。腹腔注射体积不宜过大,一般小鼠按10mL/kg以内控制,20g小鼠约0.2mL。必要时做溶解度预实验和溶剂对照预实验,再确定配方。
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