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Epigallocatechin gallate (EGCG), a major component of tea, has known effects on obesity, fatty liver, and obesity‐related cancer. We explored the effects of EGCG on the differentiation of bovine mesenchymal stem cells (BMSCs, which are multipotent) in a dose‐ and time‐dependent manner. Differentiating BMSCs were exposed to various concentrations of EGCG (0, 10, 50, 100, and 200 µM) for 2, 4, and 6 days. BMSCs were cultured in Dulbecco's modified Eagle's medium (DMEM)/high‐glucose medium with adipogenic inducers for 6 days, and the expression levels of various genes involved in adipogenesis were measured using real‐time polymerase chain reaction (PCR) and Western blotting. We assessed apoptosis by flow cytometry and terminal deoxynucleotidyl transferase dUTP nick‐end labeling (TUNEL) staining of control and EGCG‐exposed cells. We found that EGCG significantly suppressed fat deposition and cell viability ( P  < 0.05). The mRNA and protein levels of various adipogenic factors were measured. Expression of the genes encoding peroxisome proliferator‐activated receptor gamma (PPARG), CCAAT/enhancer‐binding protein alpha (CEBPA), fatty acid‐binding protein 4 (FABP4), and stearoyl‐CoA desaturase (SCD) were diminished by EGCG during adipogenic differentiation ( P  < 0.05). We also found that EGCG lowered the expression levels of the adipogenic proteins encoded by these genes ( P  < 0.05). EGCG induced apoptosis during adipogenic differentiation ( P  < 0.05). Thus, exposure to EGCG potentially inhibits adipogenesis by triggering apoptosis; the data suggest that EGCG inhibits adipogenic differentiation in BMSCs.

Epigallocatechin‐3‐gallate suppresses the lipid deposition through the apoptosis during differentiation in bovine bone marrow mesenchymal stem cells