Thy-1 Expressing Mesenchymal Cells in Rat Nephrogenesis in Correlation with Cells Immunoreactive for .ALPHA.-Smooth Muscle Actin and Vimentin
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- Yuasa Takahiro
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University
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- Izawa Takeshi
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University
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- Kuwamura Mitsuru
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University
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- Yamate Jyoji
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University
Bibliographic Information
- Other Title
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- Thy-1 expressing mesenchymal cells in rat nephrogenesis in correlation with cells immunoreactive for α-smooth muscle actin and vimentin
- Thy 1 expressing mesenchymal cells in rat nephrogenesis in correlation with cells immunoreactive for a smooth muscle actin and vimentin
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Abstract
Thy-1 expression may influence myofibroblast development. Through the epithelial-mesenchymal transition (EMT), injured renal epithelial cells undergo regression to the metanephric mesenchymal phenotype and then acquire a myofibroblastic nature (expressing α-smooth muscle actin; α-SMA). Because the metanephric blastema differentiates into mesenchymal and renal epithelial cells, we investigated Thy-1 immunoexpression during nephrogenesis in F344 rats in correlation with vimentin and α-SMA expressions. Kidney samples were obtained from fetuses on gestation days 18 and 21, neonates on days 1-18 and adults at 6 weeks of age. Mesangial cells in S-shaped bodies and immature and mature glomeruli continuously expressed both Thy-1 and α-SMA during early nephrogenesis (fetuses and neonates on days 1-9). During early nephrogenesis, loosely-arranged blastemal cell-derived mesenchymal cells in the cortex and medulla also exhibited Thy-1 and α-SMA, although the α-SMA expression was weaker than that of Thy-1. Vimentin expression coincided with that of Thy-1. These findings indicate that the derivation of α-SMA-expressing myofibroblastic cells may be related to mesangial or blastemal cells expressing both Thy-1 and α-SMA. Interestingly, there was a difference in Thy-1 expression between cortical and medullary tubulointerstitial cells from late nephrogenesis (neonates on days 12-18) and those from adults in that the cortical cells reacted faintly or negatively to Thy-1, whereas the medullary cells reacted strongly to Thy-1; additionally, bundle-arranged mesenchymal cells that were only observed in the neonates on days 1-12 reacted strongly to α-SMA, but faintly to Thy-1. Blastemal cell-derived mesenchymal cells seem to alter the immunoexpressions of Thy-1 and α-SMA, depending on the conditions which they develop. Thy-1 immunoexpression would be useful for investigation of reverse embryogenesis, which might occur in fibrotic kidneys.
Journal
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- Journal of Toxicologic Pathology
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Journal of Toxicologic Pathology 23 (1), 1-10, 2010
JAPANESE SOCIETY OF TOXICOLOGIC PATHOLOGY
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Details 詳細情報について
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- CRID
- 1390282679393190272
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- NII Article ID
- 130000262636
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- NII Book ID
- AN10232280
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- DOI
- 10.1293/tox.23.1
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- COI
- 1:STN:280:DC%2BC387ntF2huw%3D%3D
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- ISSN
- 1881915X
- 09149198
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- NDL BIB ID
- 10647666
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- PubMed
- 22272005
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed