A novel ND1 mitochondrial DNA mutation is maternally inherited in growth hormone transgenesis in amago salmon (Oncorhynchus masou ishikawae).

Tomohiko Sato, Naoko Goto-Inoue, Masaya Kimishima, Jike Toyoharu, Ryuhei Minei, Atsushi Ogura, Hiroyuki Nagoya, Tsukasa Mori

Scientific reports 2022 Apr 25

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Growth hormone (GH) transgenesis can be used to manipulate the growth performance of fish and mammals. In this study, homozygous and hemizygous GH-transgenic amago salmon (Oncorhynchus masou ishikawae) derived from a single female exhibited hypoglycemia. Proteomic and signal network analyses using iTRAQ indicated a decreased NAD+/NADH ratio in transgenic fish, indicative of reduced mitochondrial ND1 function and ROS levels. Mitochondrial DNA sequencing revealed that approximately 28% of the deletion mutations in the GH homozygous- and hemizygous-female-derived mitochondrial DNA occurred in ND1. These fish also displayed decreased ROS levels. Our results indicate that GH transgenesis in amago salmon may induce specific deletion mutations that are maternally inherited over generations and alter energy production. © 2022. The Author(s).

Citation

Tomohiko Sato, Naoko Goto-Inoue, Masaya Kimishima, Jike Toyoharu, Ryuhei Minei, Atsushi Ogura, Hiroyuki Nagoya, Tsukasa Mori. A novel ND1 mitochondrial DNA mutation is maternally inherited in growth hormone transgenesis in amago salmon (Oncorhynchus masou ishikawae). Scientific reports. 2022 Apr 25;12(1):6720