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Kozuki S, Kabata M, Sakurai S, Iwaisako K, Nishimura T, Toi M, Yamamoto T, Toyoshima F. Periportal hepatocyte proliferation at midgestation governs maternal glucose homeostasis in mice. Commun Biol 2023; 6:1226. [PMID: 38049528 PMCID: PMC10695921 DOI: 10.1038/s42003-023-05614-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 11/20/2023] [Indexed: 12/06/2023] Open
Abstract
The maternal liver is challenged by metabolic demands throughout pregnancy. However, hepatocyte dynamics and their physiological significance in pregnancy remain unclear. Here, we show in mice that hepatocyte proliferation is spatiotemporally regulated in each liver lobular zone during pregnancy, with transient proliferation of periportal and pericentral hepatocytes during mid and late gestation, respectively. Using adeno-associated virus (AAV)-8-mediated expression of the cell cycle inhibitor p21 in hepatocytes, we show that inhibition of hepatocyte proliferation during mid, but not late, gestation impairs liver growth. Transcriptionally, genes involved in glucose/glycogen metabolism are downregulated in late pregnancy when midgestational hepatocyte proliferation is attenuated. In addition, hepatic glycogen storage is abolished, with concomitant elevated blood glucose concentrations, glucose intolerance, placental glycogen deposition, and fetal overgrowth. Laser capture microdissection and RNA-seq analysis of each liver lobular zone show zone-specific changes in the transcriptome during pregnancy and identify genes that are periportally expressed at midgestation, including the hyaluronan-mediated motility receptor (Hmmr). Knockdown of Hmmr in hepatocytes by AAV8-shHmmr suppresses periportal hepatocyte proliferation at midgestation and induces impaired hepatic glycogen storage, glucose intolerance, placental glycogen deposition and fetal overgrowth. Our results suggest that periportal hepatocyte proliferation during midgestation is critical for maternal glycogen metabolism and fetal size.
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Affiliation(s)
- Satoshi Kozuki
- Department of Biosystems Science, Institute for Life and Medical Sciences, Kyoto University, Kyoto, 606-8507, Japan
- Department of Mammalian and Regulatory Networks, Graduate School of Biostudies, Kyoto University, Kyoto, 606-8502, Japan
| | - Mio Kabata
- Department of Life Science Frontiers, Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, 606-8507, Japan
| | - Satoko Sakurai
- Department of Life Science Frontiers, Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, 606-8507, Japan
| | - Keiko Iwaisako
- Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyoto, 610-0394, Japan
- Department of Target Therapy Oncology, Graduate School of Medicine, Kyoto University, Kyoto, 606-8507, Japan
| | - Tomomi Nishimura
- Department of Breast Surgery, Graduate School of Medicine, Kyoto University, Kyoto, 606-8507, Japan
| | - Masakazu Toi
- Department of Breast Surgery, Graduate School of Medicine, Kyoto University, Kyoto, 606-8507, Japan
| | - Takuya Yamamoto
- Department of Life Science Frontiers, Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, 606-8507, Japan
- Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan
- Medical Risk Avoidance based on iPS Cells Team, RIKEN Center for Advanced Intelligence Project (AIP), Kyoto, 606-8507, Japan
| | - Fumiko Toyoshima
- Department of Biosystems Science, Institute for Life and Medical Sciences, Kyoto University, Kyoto, 606-8507, Japan.
- Department of Mammalian and Regulatory Networks, Graduate School of Biostudies, Kyoto University, Kyoto, 606-8502, Japan.
- Department of Homeostatic Medicine, Medical Research Institute, Tokyo Medical and Dental University (TMDU), Yushima Bunkyo-ku, Tokyo, 113-8510, Japan.
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