| First Author | Shimizu Y | Year | 2018 |
| Journal | J Mol Cell Cardiol | Volume | 116 |
| Pages | 29-40 | PubMed ID | 29408195 |
| Mgi Jnum | J:257530 | Mgi Id | MGI:6115096 |
| Doi | 10.1016/j.yjmcc.2018.01.011 | Citation | Shimizu Y, et al. (2018) Hydrogen sulfide regulates cardiac mitochondrial biogenesis via the activation of AMPK. J Mol Cell Cardiol 116:29-40 |
| abstractText | BACKGROUND: Hydrogen sulfide (H2S) is an important regulator of mitochondrial bioenergetics, but its role in regulating mitochondrial biogenesis is not well understood. Using both genetic and pharmacological approaches, we sought to determine if H2S levels directly influenced cardiac mitochondrial content. RESULTS: Mice deficient in the H2S-producing enzyme, cystathionine gamma-lyase (CSE KO) displayed diminished cardiac mitochondrial content when compared to wild-type hearts. In contrast, mice overexpressing CSE (CSE Tg) and mice supplemented with the orally active H2S-releasing prodrug, SG-1002, displayed enhanced cardiac mitochondrial content. Additional analysis revealed that cardiac H2S levels influenced the nuclear localization and transcriptional activity of peroxisome proliferator-activated receptor gamma coactivator 1alpha (PGC1alpha) with higher levels having a positive influence and lower levels having a negative influence. Studies aimed at evaluating the underlying mechanisms found that H2S required AMP-activated protein kinase (AMPK) to induce PGC1alpha signaling and mitochondrial biogenesis. Finally, we found that restoring H2S levels with SG-1002 in the setting of heart failure increased cardiac mitochondrial content, improved mitochondrial respiration, improved ATP production efficiency, and improved cardiac function. CONCLUSIONS: Together, these results suggest that hydrogen sulfide is an important regulator of cardiac mitochondrial content and establishes that exogenous hydrogen sulfide can induce mitochondrial biogenesis via an AMPK-PGC1alpha signaling cascade. |
