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Int. J. Mol. Sci. 2017, 18(4), 853; doi:10.3390/ijms18040853

TβRII Regulates the Proliferation of Metanephric Mesenchyme Cells through Six2 In Vitro

The M.O.E. Key Laboratory of Laboratory Medical Diagnostics, the College of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
These authors contributed equally to this work.
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Academic Editor: Gregor Drummen
Received: 12 February 2017 / Revised: 22 March 2017 / Accepted: 11 April 2017 / Published: 18 April 2017
(This article belongs to the Section Biochemistry, Molecular and Cellular Biology)
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Abstract

The transforming growth factor-β (TGFβ) family signaling pathways play an important role in regulatory cellular networks and exert specific effects on developmental programs during embryo development. However, the function of TGFβ signaling pathways on the early kidney development remains unclear. In this work, we aim to detect the underlying role of TGFβ type II receptor (TβRII) in vitro, which has a similar expression pattern as the crucial regulator Six2 during early kidney development. Firstly, the 5-ethynyl-2′-deoxyuridine (EdU) assay showed knock down of TβRII significantly decreased the proliferation ratio of metanephric mesenchyme (MM) cells. Additionally, real-time Polymerase Chain Reaction (PCR) and Western blot together with immunofluorescence determined that the mRNA and protein levels of Six2 declined after TβRII knock down. Also, Six2 was observed to be able to partially rescue the proliferation phenotype caused by the depletion of TβRII. Moreover, bioinformatics analysis and luciferase assay indicated Smad3 could transcriptionally target Six2. Further, the EdU assay showed that Smad3 could also rescue the inhibition of proliferation caused by the knock down of TβRII. Taken together, these findings delineate the important function of the TGFβ signaling pathway in the early development of kidney and TβRII was shown to be able to promote the expression of Six2 through Smad3 mediating transcriptional regulation and in turn activate the proliferation of MM cells. View Full-Text
Keywords: TβRII; Six2; Smad3; kidney development; proliferation TβRII; Six2; Smad3; kidney development; proliferation
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MDPI and ACS Style

Mao, Z.; Lyu, Z.; Huang, L.; Zhou, Q.; Weng, Y. TβRII Regulates the Proliferation of Metanephric Mesenchyme Cells through Six2 In Vitro. Int. J. Mol. Sci. 2017, 18, 853.

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