Characteristic Distribution of Hematopoietic Cells in Bone Marrow of <i>Xenopus Laevis</i>
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- Morita Sumiharu
- Department of Anatomy, Tokyo Dental College
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- Moriishi Takeshi
- Department of Cell Biology, Nagasaki University Graduate School of Biomedical Sciences
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- Matsunaga Satoru
- Department of Anatomy, Tokyo Dental College Tokyo Dental College Research Branding Project, Tokyo Dental College
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- Kitamura Kei
- Tokyo Dental College Research Branding Project, Tokyo Dental College Department of Histology and Developmental Biology, Tokyo Dental College
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- Abe Shin-ichi
- Department of Anatomy, Tokyo Dental College Tokyo Dental College Research Branding Project, Tokyo Dental College
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- Yamaguchi Akira
- Tokyo Dental College Research Branding Project, Tokyo Dental College Oral Health Science Center, Tokyo Dental College
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抄録
<p>Bone marrow is the principal site of hematopoiesis in mammals. Amphibians were the first phylogenetic group in vertebrates to acquire bone marrow, but the distribution of hematopoietic cells in the bone marrow of the primitive frog, Xenopus laevis (X. laevis) has not been well documented. The purpose of this study was to perform a histological investigation of the distribution of hematopoietic cells in femoral bone marrow at various stages of development in X. laevis. Hematopoietic cells showed preferential distribution on the endosteal surface of cortical bone throughout all stages of development, from tadpole to aged frog. In mature frogs, hematopoietic cells appeared at the boundary between the epiphysis and the bone marrow. The distribution of hematopoietic cells around the blood vessels was limited to a small number of vessels in the bone marrow. Abundant adipose tissue was observed in the bone marrow cavity from the tadpole stage to the mature frog stage. Hematopoietic cells showed preferential distribution in a belt-like fashion on the surface of newly-formed bones in a bone regeneration model in the diaphysis of X. laevis. These results indicate that the distribution of hematopoietic cells in bone marrow in X. laevis differs from that in mammals, and that the bone marrow of X. laevis constitutes a useful model for exploring the mechanism underlying the phylogenetic differentiation of bone marrow hematopoiesis.</p>
収録刊行物
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- The Bulletin of Tokyo Dental College
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The Bulletin of Tokyo Dental College 62 (3), 171-180, 2021
東京歯科大学
