Human adipocytes were acquired from fresh omentum of ovarian cancer patients undergoing surgery. Fresh omentum was minced with scissors, digested by gentleMACS (Miltenyi) [45 (link)] to obtain single cells. After centrifuge with condition of 100rpm, the suspension separated into 4 layers, which are cell pallets, conditional medium, adipocytes and free fat oil. And then we carefully isolated adipocytes, counted and cultured in six-well plates with DF12 (Gibco) supplemented with 2% FBS (Gibco) for 1×106 adipocytes. 48 hours later, the supernatant was harvested as conditioned medium of human primary cultured adipocytes (hCM). hCM were filtered through 200-mesh sieves to remove cell debris before use.
3T3-L1 cells were chemically induced by DMEM with 10% FBS (Gibco), 0.5mM IBMX (TOPSCIENCE, T1713), 1μM Dexamethasone (TOPSCIENCE, T1076), 5μg/ml insulin (Bovine, Sigma I-5500) for 2 days and DMEM with 10% FBS (Gibco), 10μg/ml insulin (Bovine, Sigma I-5500) for 2 days to differentiate into adipocyte-like cells. Then the supernatant of induced adipocyte-like 3T3-L1 cells was collected at 24 hours as mouse conditioned medium (mCM). After pretreatment with metformin (1 mM, Beyotime, catalog number s1741–1g) for 12 hours, the induced adipocyte-like 3T3-L1 cells were cultured with complete medium for 24 hours, and the supernatant collected as CM (MET).
3T3-L1 cells were chemically induced by DMEM with 10% FBS (Gibco), 0.5mM IBMX (TOPSCIENCE, T1713), 1μM Dexamethasone (TOPSCIENCE, T1076), 5μg/ml insulin (Bovine, Sigma I-5500) for 2 days and DMEM with 10% FBS (Gibco), 10μg/ml insulin (Bovine, Sigma I-5500) for 2 days to differentiate into adipocyte-like cells. Then the supernatant of induced adipocyte-like 3T3-L1 cells was collected at 24 hours as mouse conditioned medium (mCM). After pretreatment with metformin (1 mM, Beyotime, catalog number s1741–1g) for 12 hours, the induced adipocyte-like 3T3-L1 cells were cultured with complete medium for 24 hours, and the supernatant collected as CM (MET).
