The mouse endothelial cell line bEnd.3 was obtained from ATCC, Catalog number CRL-2299. MLO-Y4 was a gift from Dr Lynda F Bonewald. bEnd.3 cells were maintained in high-glucose Dulbecco’s modified Eagle’s medium (DMEM) containing 10% fetal bovine serum (FBS) (Gibco Cat. 10099141) and 1% penicillin/streptomycin (P/S). MLO-Y4 cells were maintained in alpha–minimal essential medium (alpha­MEM) containing 10% FBS and 1% P/S. For 2D coculture, bEnd.3 cells were seeded on coverslips in 24-well plates. After 24 hours, MLO-Y4 cells were seeded in the wells that cultured bEnd.3 cells. The cells were maintained at 37 °C in a 5% CO2 humidified incubator.
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