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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Kozuki S, Sakurai S, Suzuki A, Yamamoto T, Toyoshima F. Delineation of biliary epithelial cell dynamics in maternal liver during pregnancy. Genes Cells 2021; 27:192-201. [PMID: 34967957 DOI: 10.1111/gtc.12918] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 12/28/2021] [Accepted: 12/28/2021] [Indexed: 11/29/2022]
Abstract
In pregnant mice, the maternal liver expands drastically during gestation, which is believed to be essential to accommodate various metabolic demands caused by physiological changes and fetal growth. Although hepatocyte proliferation and hypertrophy have been reported, little is known about the dynamics of biliary epithelial cells (BECs), which comprise the bile duct epithelium in the liver. Here, we show that BECs transiently proliferate during the early stage of gestation. Lineage tracing revealed that BEC progeny were retained in the bile duct epithelium and did not differentiate into hepatocytes, indicating BEC self-replication during pregnancy. RNA-sequencing analysis of BECs identified their early pregnancy-signature transcriptomes, which highlighted Yes-associated protein (YAP) signaling-related genes. Nuclear accumulation of YAP was enhanced in BECs during pregnancy but was barely detectable in hepatocytes. In addition, the pharmacological inhibition of YAP attenuated BEC proliferation and liver weight gain during pregnancy. Our results delineate the proliferation and transcriptomic dynamics of BECs during pregnancy and suggest the relevance of YAP-mediated signals.
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Affiliation(s)
- Satoshi Kozuki
- Department of Biosystems Science, Institute for Frontier 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
| | - Satoko Sakurai
- Department of Life Science Frontiers, Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, 606-8507, Japan
| | - Atsushi Suzuki
- Division of Organogenesis and Regeneration, Medical Institute of Bioregulation, Kyushu University, Fukuoka, 812-8582, 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 Frontier 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
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Ishibashi R, Kozuki S, Kamakura S, Sumimoto H, Toyoshima F. c-Rel Regulates Inscuteable Gene Expression during Mouse Embryonic Stem Cell Differentiation. J Biol Chem 2015; 291:3333-45. [PMID: 26694615 DOI: 10.1074/jbc.m115.679563] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Indexed: 11/06/2022] Open
Abstract
Inscuteable (Insc) regulates cell fate decisions in several types of stem cells. Although it is recognized that the expression levels of mouse INSC govern the balance between symmetric and asymmetric stem cell division, regulation of mouse Insc gene expression remains poorly understood. Here, we showed that mouse Insc expression transiently increases at an early stage of differentiation, when mouse embryonic stem (mES) cells differentiate into bipotent mesendoderm capable of producing both endoderm and mesoderm in defined culture conditions. We identified the minimum transcriptional regulatory element (354 bases) that drives mouse Insc transcription in mES cells within a region >5 kb upstream of the mouse Insc transcription start site. We found that the transcription factor reticuloendotheliosis oncogene (c-Rel) bound to the minimum element and promoted mouse Insc expression in mES cells. In addition, short interfering RNA-mediated knockdown of either mouse INSC or c-Rel protein decreased mesodermal cell populations without affecting differentiation into the mesendoderm or endoderm. Furthermore, overexpression of mouse INSC rescued the mesoderm-reduced phenotype induced by knockdown of c-Rel. We propose that regulation of mouse Insc expression by c-Rel modulates cell fate decisions during mES cell differentiation.
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Affiliation(s)
- Riki Ishibashi
- From the Department of Cell Biology, Institute for Virus Research, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan, the Department of Mammalian Regulatory Networks, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and
| | - Satoshi Kozuki
- From the Department of Cell Biology, Institute for Virus Research, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan, the Department of Mammalian Regulatory Networks, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and
| | - Sachiko Kamakura
- the Department of Biochemistry, Kyushu University Graduate School of Medical Sciences, Fukuoka 812-8582, Japan
| | - Hideki Sumimoto
- the Department of Biochemistry, Kyushu University Graduate School of Medical Sciences, Fukuoka 812-8582, Japan
| | - Fumiko Toyoshima
- From the Department of Cell Biology, Institute for Virus Research, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan, the Department of Mammalian Regulatory Networks, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and
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Shoji J, Sakazaki R, Matsumoto K, Tanimoto T, Terui Y, Kozuki S, Kondo E. Isolation of 7 beta-(5-hydroxy-5-carboxyvarelamido)-3-hydroxymethyl-3-cephem-4-carboxylic acid from streptomyces sp. J Antibiot (Tokyo) 1983; 36:167-9. [PMID: 6833132 DOI: 10.7164/antibiotics.36.167] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Shoji J, Hinoo H, Sakazaki R, Tsuji N, Nagashima K, Matsumoto K, Takahashi Y, Kozuki S, Hattori T, Kondo E, Tanaka K. Asparenomycins A, B and C, new carbapenem antibiotics. II. Isolation and chemical characterization. J Antibiot (Tokyo) 1982; 35:15-23. [PMID: 7040325 DOI: 10.7164/antibiotics.35.15] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
New carbapenem antibiotics named asparenomycins A, B and C were isolated from the fermentation broths of Streptomyces tokumonensis sp. nov. and of Streptomyces argenteolus. The fermentative production, isolation and physico-chemical properties of these antibiotics are described.
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Shoji JI, Kozuki S, Okamoto S, Sakazaki R, Otsuka H. Studies on tsushimycin. I. Isolation and characterization of an acidic acylpeptide containing a new fatty acid. J Antibiot (Tokyo) 1968; 21:439-43. [PMID: 5708315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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