Loss of mtch2 function impairs early development of liver, intestine and visceral adipocytes in zebrafish larvae.

The mitochondrial carrier homologue 2 (MTCH2) has been shown to be essential for embryogenesis in mice, and variants in the MTCH2 locus have been linked to obesity in humans. Here, we investigated the importance of mtch2 for embryogenesis and adipocyte formation in zebrafish in vivo. We show that mtch2 is conserved in zebrafish and broadly expressed during embryogenesis. Knock-down of mtch2 results in impaired development of liver and intestine, and is associated with a reduced number of adipocytes and impaired postembryonic growth. The findings indicate an essential role for mtch2 during organ development and adipogenesis in vivo.