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Uchida-Fukuhara Y, Hattori T, Fu S, Kondo S, Kuwahara M, Fukuhara D, Islam MM, Kataoka K, Ekuni D, Kubota S, Morita M, Iikegame M, Okamura H. Maternal Gut Microbiome Decelerates Fetal Endochondral Bone Formation by Inducing Inflammatory Reaction. Microorganisms 2022; 10:microorganisms10051000. [PMID: 35630443 PMCID: PMC9147398 DOI: 10.3390/microorganisms10051000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/29/2022] [Accepted: 05/05/2022] [Indexed: 02/01/2023] Open
Abstract
To investigate the effect of the maternal gut microbiome on fetal endochondral bone formation, fetuses at embryonic day 18 were obtained from germ-free (GF) and specific-pathogen-free (SPF) pregnant mothers. Skeletal preparation of the fetuses’ whole bodies did not show significant morphological alterations; however, micro-CT analysis of the tibiae showed a lower bone volume fraction in the SPF tibia. Primary cultured chondrocytes from fetal SPF rib cages showed a lower cell proliferation and lower accumulation of the extracellular matrix. RNA-sequencing analysis showed the induction of inflammation-associated genes such as the interleukin (IL) 17 receptor, IL 6, and immune-response genes in SPF chondrocytes. These data indicate that the maternal gut microbiome in SPF mice affects fetal embryonic endochondral ossification, possibly by changing the expression of genes related to inflammation and the immune response in fetal cartilage. The gut microbiome may modify endochondral ossification in the fetal chondrocytes passing through the placenta.
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Affiliation(s)
- Yoko Uchida-Fukuhara
- Department of Oral Morphology, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8525, Japan; (M.I.); (H.O.)
- Correspondence: ; Tel.: +81-86-235-6632; Fax: +81-86-235-6634
| | - Takako Hattori
- Department of Biochemistry and Molecular Dentistry, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8525, Japan; (T.H.); (S.F.); (S.K.); (M.K.); (S.K.)
| | - Shanqi Fu
- Department of Biochemistry and Molecular Dentistry, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8525, Japan; (T.H.); (S.F.); (S.K.); (M.K.); (S.K.)
| | - Sei Kondo
- Department of Biochemistry and Molecular Dentistry, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8525, Japan; (T.H.); (S.F.); (S.K.); (M.K.); (S.K.)
| | - Miho Kuwahara
- Department of Biochemistry and Molecular Dentistry, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8525, Japan; (T.H.); (S.F.); (S.K.); (M.K.); (S.K.)
| | - Daiki Fukuhara
- Department of Preventive Dentistry, Okayama University Hospital, Okayama 700-0914, Japan;
| | - Md Monirul Islam
- Department of Preventive Dentistry, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan; (M.M.I.); (K.K.); (D.E.); (M.M.)
| | - Kota Kataoka
- Department of Preventive Dentistry, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan; (M.M.I.); (K.K.); (D.E.); (M.M.)
| | - Daisuke Ekuni
- Department of Preventive Dentistry, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan; (M.M.I.); (K.K.); (D.E.); (M.M.)
| | - Satoshi Kubota
- Department of Biochemistry and Molecular Dentistry, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8525, Japan; (T.H.); (S.F.); (S.K.); (M.K.); (S.K.)
| | - Manabu Morita
- Department of Preventive Dentistry, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan; (M.M.I.); (K.K.); (D.E.); (M.M.)
| | - Mika Iikegame
- Department of Oral Morphology, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8525, Japan; (M.I.); (H.O.)
| | - Hirohiko Okamura
- Department of Oral Morphology, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8525, Japan; (M.I.); (H.O.)
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