本产品包含各种酶法组织消化中常用的胶原酶等蛋白酶,能特异性地降解胞外胶原蛋白,使胶原蛋白和纤维粘连蛋白的网状结构解离,而不损坏细胞表面结构的完整性。使用本产品进行组织消化可以使组织中细胞间的桥连结构松动,使组织由块状变成絮状,经过机械吹打后制成少量细胞群团和大量单个细胞的细胞悬液。制备的细胞悬液可用于原代培养、流式细胞仪进行细胞生物学 (如凋亡、增殖、细胞周期等)研究。
适用范围:各种正常肠和肠肿瘤组织,从中分离得到原代细胞,包括上皮细胞,间质细胞,成纤维细胞等。
使用说明
1. 提前将消化酶从-20 ℃冰箱取出置于2-8 ℃融化;
2. 将冰盒表面消毒之后移入到超净台内。在无菌条件下,冰上在培养皿中将组织样本置于组织清洗液内清洗3~5 s;
3. 在无菌条件下,将清洗后的组织样本浸没在盛有10 mL组织清洗液的培养皿中。冰上采用无菌手术刀将样本机械切割成1~2 mm³大小后,将样品碎块转移至50 mL无菌离心管中;
4. 加入10~20 mL组织清洗液于离心管中,1200 rpm 4 ℃离心5 min;
5. 弃上清,按照步骤4再清洗一次。加入10~30mL本消化酶 (消化酶体积至少为组织体积的5倍),标记样本名称及编号并用封口膜封口,放入恒温振荡培养箱中振荡消化,设置参数37 ℃、150~250 rpm (根据样本质地设置转速),待组织消化至出现团絮状 (一般消化30 min左右),即可终止消化;
6. 取出消化好的样本,加入5~10 mL含血清DMEM培养基,100 μm细胞筛网过滤;
7. 将过筛后的细胞悬液于350 g常温离心5 min;
8. 弃上清后,细胞沉淀加入原代细胞培养基待用。
注意事项
1. 本产品常规在-20 ℃保存。使用前需在2-8 ℃融化,融化后需在一周内使用完毕,若需长期使用,可按需分装在-20 ℃长期保存。
2, 使用本产品时应注意无菌操作,避免污染。
3. 为保持本产品的最佳使用效果,一般在37 ℃条件下使用,根据具体实验情况也可在2-8 ℃条件下使用。
4. 本产品的消化时间需要根据样品大小进行摸索。
5. 请于保质期内使用本产品,超出保质期后,将无法达到理想的使用效果。
6. 本产品仅用于科研用途,不能用于体外诊断。
This product contains proteases such as collagenase commonly used in enzymatic tissue digestion. It can specifically degrade extracellular collagen, dissociate the reticular structure of collagen and fibronectin, without damaging the integrity of cell surface structures. Tissue digestion with this product loosens intercellular bridging structures, transforming massive tissues into flocculent substances. A cell suspension containing small cell clusters and a large number of single cells can be obtained after mechanical pipetting. The prepared cell suspension is applicable to primary cell culture and flow cytometry cell biology studies, including apoptosis, proliferation, cell cycle analysis and other assays.
Application Scope
Suitable for various normal and tumor tissues to isolate primary cells, including epithelial cells, stromal cells, fibroblasts and other cell types.
Instructions for Use
1. Take the digestive enzyme out of the -20℃ refrigerator in advance and thaw it at 2–8℃.
2. Disinfect the surface of the ice box and transfer it into the biosafety cabinet. Under aseptic conditions, rinse tissue samples with tissue washing solution in petri dishes on ice for 3–5 times.
3. Under aseptic conditions, immerse the cleaned tissue samples in a petri dish containing 10 mL tissue washing solution. Use a sterile scalpel to cut samples into 1–2 mm³ fragments on ice, then transfer the tissue pieces into sterile 50 mL centrifuge tubes.
4. Add 10–20 mL tissue washing solution into centrifuge tubes, and centrifuge at 1200 rpm for 5 min at 4℃.
5. Discard the supernatant and wash once again following Step 4. Add 10–30 mL digestive enzyme (the volume of digestive enzyme shall be at least 5 times the tissue volume). Label sample names and numbers, seal tubes with parafilm, and place in a constant-temperature shaking incubator for shaking digestion. Set parameters at 37 ℃, 150–250 rpm (adjust rotational speed according to tissue texture). Terminate digestion when tissues become flocculent (usually about 30 minutes).
6. Take out digested samples, add 5 mL serum-containing DMEM medium, and filter through a 100 μm cell strainer.
7. Centrifuge the filtered cell suspension at 350 g for 5 min at room temperature.
8. Discard the supernatant, resuspend cell pellet with primary cell medium for subsequent use.
Precautions
1. This product is routinely stored at -20 ℃. Thaw at 2–8 ℃ before use and finish use within one week after thawing. For long-term storage, it can be aliquoted and preserved at -20 ℃ as required.
2. Strict aseptic operation is required during use to avoid contamination.
3. To maintain optimal performance, the product is generally used at 37 ℃, and can also be applied at 2–8 ℃ according to specific experimental conditions.
4. The digestion time shall be optimized according to sample size.
5. Use the product within the shelf life. Desired experimental effects cannot be guaranteed after expiration.
6. For research use only, not for in vitro diagnosis.