人肺癌类器官培养基 (Human Lung Carcinoma Organoid Medium)是一种为促进肺癌类器官体外形成和扩增而设计的 培养基。它是一种无菌的液体混合系统,含有必需和非必需的氨基酸、维生素、有机和无机化合物、激素、生长因子、微量矿物质等。该培养基的独特配方可以提供一个最适的类器官扩增所需营养环境,选择性地促进体外人肺癌类器官的生长。
使用说明
1. 实验前准备:
(1) 消化好的肺癌原代细胞悬液。
(2) 15 mL无菌离心管、1.5 mL离心管、24孔细胞培养板、移液器、移液管、无菌枪头等表面消毒后放入超净工作台中紫外照射30 min。
(3) 提前30 min从4 ℃冰箱取出肺癌类器官完全培养基平衡至室温,提前从-20 ℃冰箱取出所需体积的基质胶冰上融化。
2. 肺癌类器官培养
(1) 将消化好的肺癌细胞悬液计数,按照1-2万细胞每孔计算所需的细胞数,根据计算好的体积吸取细胞悬液加 入预冷的1.5 mL离心管中。
(2) 补齐预冷的DMEM/F12培养基至所需体积,将预冷后的细胞悬液加入等体积的基质胶中轻轻混匀 (全程冰上操作),然后将细胞与基质胶的混合液按照40 μL/孔接种于24孔板。
(3) 将接种好的培养板放入培养箱至少30 min,待基质胶完全凝固,然后沿24孔壁每孔缓慢加入500 μL预先恢复至室温的类器官完全培养基。
(4) 3天后镜下观察类器官形成情况,粒径大于50 μm即认为类器官已经形成,每5天更换一次培养基进行培养,持续观察类器官大小,镜下观察大部分类器官大小均大于50 μm且大小不再增大即可收集类器官进行后续实验。
3. 肺癌类器官收集
弃培养基,每孔加入500 μL预冷DF12,反复吹打至基质胶完全脱离底板,收集至15 mL离心管中,1500 rpm离心5 min,轻轻吸去上清和基质胶层,待用。
4. 肺癌类器官传代
(1) 收集的类器官,加入3-5 mL类器官解离试剂 (O1521153),37℃,200 rpm水平摇晃振荡消化 (具体时间根据类器官大小和数量决定,以肉眼可见颗粒明显减小一半为准,可中间取消化的类器官显微镜观察,类器官消化至包含3~10个细胞团块最佳)。
(2) 消化完全后1500 rpm离心3 min,弃上清,使用清洗液重悬后1500 rpm离心3 min,加入预冷的类器官培 养基进行重悬,计数,按照培养步骤操作继续培养。
注意事项
1. 本产品在使用前需平衡至室温。
2. 使用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,不宜将其过夜放置于室温或较高的温度环境中。
4. 样本需为肺癌术中样本,且肿瘤细胞比例越高 (至少>50%),培养成功率越高,不推荐用于少量样本 (如穿刺或者循环肿瘤细胞)的培养 。
5. 请于保质期内使用本产品,超出保质期,必须放弃使用。
6. 本产品仅用于科研用途,不能用于体外诊断。
Human Lung Carcinoma Organoid Medium is a medium designed to promote the in vitro formation and expansion of human lung carcinoma organoids. It is a sterile liquid mixture system containing essential and non-essential amino acids, vitamins, organic and inorganic compounds, hormones, growth factors, trace minerals, etc. The unique formulation of this medium provides an optimal nutritional environment for organoid amplification and selectively promotes the in vitro growth of human lung carcinoma organoids.
Instructions for Use
1. Pre‑experiment Preparation
(1) Digested primary lung carcinoma cell suspension.
(2) Disinfect the surfaces of 15 mL sterile centrifuge tubes, 1.5 mL centrifuge tubes, 24‑well cell culture plates, pipettes, pipettors, sterile pipette tips, etc., then place them in a biosafety cabinet and expose to UV irradiation for 30 min.
(2) Remove the cholangiocarcinoma organoid medium from the 4 °C refrigerator 30 min in advance and equilibrate to room temperature. Take the required volume of matrix gel from the −20 °C refrigerator and thaw on ice in advance.
2. Culture of Lung Carcinoma Organoids
(1) Count the digested cholangiocarcinoma cell suspension. Calculate the required cell number at a seeding density of 10,000-20,000 cells per well. Transfer the calculated volume of cell suspension into a pre‑cooled 1.5 mL centrifuge tube.
(2) Top up with pre‑cooled DMEM/F12 to the required volume. Add the pre‑cooled cell suspension to an equal volume of matrix gel and mix gently (all operations on ice). Then seed 40 μL of the cell‑matrix gel mixture per well into a 24‑well plate.
(3) Place the seeded culture plate in an incubator for at least 30 min until the matrix gel is fully solidified. Then slowly add 500 μL of complete organoid medium equilibrated to room temperature along the inner wall of each well.
(4) Observe organoid formation under a microscope after 3 days. Organoids are considered formed when their diameter exceeds 50 μm. Replace the medium every 5 days and continue monitoring organoid size. When most organoids are larger than 50 μm and no longer increase in size under microscopy, collect organoids for subsequent experiments.
3. Harvesting of Lung Carcinoma Organoids
Discard the medium. Add 500 μL of pre‑cooled DF12 to each well, and pipette repeatedly until the matrix gel is completely detached from the plate bottom. Collect the suspension into a 15 mL centrifuge tube, centrifuge at 1500 rpm for 5 min, gently aspirate the supernatant and matrix gel layer, and set aside for later use.
4. Subculture of Lung Carcinoma Organoids
(1) Add 3-5 mL of Organoid Dissociation Reagent (O1521153) to the collected organoids. Digest with horizontal shaking at 37 °C, 200 rpm (actual digestion time depends on organoid size and quantity, until visible particles are obviously reduced by half. Midway microscopic observation is recommended; optimal digestion is achieved when organoids are dissociated into clusters of 3-10 cells).
(2) After complete digestion, centrifuge at 1500 rpm for 3 min and discard the supernatant. Resuspend with washing solution, centrifuge again at 1500 rpm for 3 min, then resuspend the pellet in pre‑cooled organoid medium. Count and continue culture following the seeding procedure.
Precautions
1. This product should be equilibrated to room temperature before use.
2. Practice aseptic technique during use to avoid contamination.
3. To maintain optimal performance, do not leave this product at room temperature or elevated temperatures overnight.
5. Samples are recommended to be intraoperative tumor specimens. A higher tumor cell proportion (at least >50%) results in a higher culture success rate. Culture of small samples (e.g., biopsy or circulating tumor cells) is not recommended.
4. Use this product within its expiration date. Discard any expired product.
6. This product is for research use only and is not intended for in vitro diagnostic procedures.