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Yeom E, Mun H, Lim J, Chun YL, Min KW, Lambert J, Cowart LA, Pierce JS, Ogretmen B, Cho JH, Chang JH, Buchan JR, Pitt J, Kaeberlein M, Kang SU, Kwon ES, Ko S, Choi KM, Lee YS, Ha YS, Kim SJ, Lee KP, Kim HS, Yang SY, Shin CH, Yoon JH, Lee KS. Phosphorylation of an RNA-Binding Protein Rck/Me31b by Hippo Is Essential for Adipose Tissue Aging. Aging Cell 2025:e70022. [PMID: 40070010 DOI: 10.1111/acel.70022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2024] [Revised: 01/20/2025] [Accepted: 02/10/2025] [Indexed: 05/15/2025] Open
Abstract
The metazoan lifespan is determined in part by a complex signaling network that regulates energy metabolism and stress responses. Key signaling hubs in this network include insulin/IGF-1, AMPK, mTOR, and sirtuins. The Hippo/Mammalian Ste20-like Kinase1 (MST1) pathway has been reported to maintain lifespan in Caenorhabditis elegans, but its role has not been studied in higher metazoans. In this study, we report that overexpression of Hpo, the MST1 homolog in Drosophila melanogaster, decreased lifespan with concomitant changes in lipid metabolism and aging-associated gene expression, while RNAi Hpo depletion increased lifespan. These effects were mediated primarily by Hpo-induced transcriptional activation of the RNA-binding protein maternal expression at 31B (Me31b)/RCK, resulting in stabilization of mRNA-encoding a lipolytic hormone, Akh. In mouse adipocytes, Hpo/Mst1 mediated adipocyte differentiation, phosphorylation of RNA-binding proteins such as Rck, decapping MRNA 2 (Dcp2), enhancer Of MRNA decapping 3 (Edc3), nucleolin (NCL), and glucagon mRNA stability by interacting with Rck. Decreased lifespan in Hpo-overexpressing Drosophila lines required expression of Me31b, but not DCP2, which was potentially mediated by recovering expression of lipid metabolic genes and formation of lipid droplets. Taken together, our findings suggest that Hpo/Mst1 plays a conserved role in longevity by regulating adipogenesis and fatty acid metabolism.
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Affiliation(s)
- Eunbyul Yeom
- School of Life Sciences, BK21 FOUR KNU Creative BioResearch Group, Kyungpook National University, Daegu, Korea
- KNU G-LAMP Project Group, KNU Institute of Basic Sciences, School of Life Sciences, College of Natural Sciences, Kyungpook National University, Daegu, Korea
- Neurophysiology and Metabolism Research Group, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, Korea
| | - Hyejin Mun
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina, USA
- Department of Oncology Science, University of Oklahoma, Oklahoma City, Oklahoma, USA
| | - Jinhwan Lim
- Department of Environmental and Occupational Heatlh, University of California, Irvine, California, USA
- Translational Gerontology Branch, National Institute of Aging Intramural Research Program, Baltimore, Maryland, USA
| | - Yoo Lim Chun
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Kyung-Won Min
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina, USA
- Department of Biology, College of Natural Sciences, Gangneung-Wonju National University, Gangneung, South Korea
| | - Johana Lambert
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina, USA
- Department of Biochemistry and Molecular Biology and the Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia, USA
- Hunter Holmes McGuire Veteran's Affairs Medical Center, Richmond, Virginia, USA
| | - L Ashley Cowart
- Department of Biochemistry and Molecular Biology and the Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia, USA
- Hunter Holmes McGuire Veteran's Affairs Medical Center, Richmond, Virginia, USA
| | - Jason S Pierce
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Besim Ogretmen
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina, USA
- Hollings Cancer Center, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Jung-Hyun Cho
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Jeong Ho Chang
- Department of Biology Education, Kyungpook National University, Daegu, Republic of Korea
| | - J Ross Buchan
- Department of Molecular and Cellular Biology, University of Arizona, Tucson, Arizona, USA
| | - Jason Pitt
- Department of Laboratory Medicine and Pathology, University of Washington, Washington, DC, USA
| | - Matt Kaeberlein
- Department of Laboratory Medicine and Pathology, University of Washington, Washington, DC, USA
| | - Sung-Ung Kang
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Baltimore, Maryland, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Eun-Soo Kwon
- Aging Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, Korea
| | - Seungbeom Ko
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Kyoung-Min Choi
- Department of Oncology Science, University of Oklahoma, Oklahoma City, Oklahoma, USA
| | - Yong Sun Lee
- Department of Cancer Biomedical Science, Graduate School of Cancer Science and Policy, National Cancer Center, Goyang, Republic of Korea
| | - Yoon-Su Ha
- Department of Biochemistry, College of Natural Sciences, Kangwon National University, Chuncheon, Republic of Korea
| | - Seung-Jin Kim
- Department of Biochemistry, College of Natural Sciences, Kangwon National University, Chuncheon, Republic of Korea
| | - Kwang-Pyo Lee
- Aging Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, Korea
| | - Hyo-Sung Kim
- School of Life Sciences, BK21 FOUR KNU Creative BioResearch Group, Kyungpook National University, Daegu, Korea
- KNU G-LAMP Project Group, KNU Institute of Basic Sciences, School of Life Sciences, College of Natural Sciences, Kyungpook National University, Daegu, Korea
| | - Seo Young Yang
- Department of Biology Education, Kyungpook National University, Daegu, Republic of Korea
| | - Chang Hoon Shin
- Department of Oncology Science, University of Oklahoma, Oklahoma City, Oklahoma, USA
| | - Je-Hyun Yoon
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina, USA
- Department of Oncology Science, University of Oklahoma, Oklahoma City, Oklahoma, USA
- Department of Pathology, University of Oklahoma, Oklahoma City, Oklahoma, USA
| | - Kyu-Sun Lee
- Neurophysiology and Metabolism Research Group, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, Korea
- School of Pharmacy, Sungkyunkwan University, Suwon, Korea
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