TY - JOUR
T1 - Role of NPR2 mutation in idiopathic short stature
T2 - Identification of two novel mutations
AU - Hwang, Il Tae
AU - Mizuno, Yusuke
AU - Amano, Naoko
AU - Lee, Hye Jin
AU - Shim, Young Suk
AU - Nam, Hyo Kyoung
AU - Rhie, Young Jun
AU - Yang, Seung
AU - Lee, Kee Hyoung
AU - Hasegawa, Tomonobu
AU - Kang, Min Jae
N1 - Funding Information:
This study was supported and funded by the National Research Foundation of Korea (NRF‐2015‐054988) and the Foundation for Growth Science.
Publisher Copyright:
© 2020 The Authors. Molecular Genetics & Genomic Medicine published by Wiley Periodicals, Inc.
PY - 2020/3/1
Y1 - 2020/3/1
N2 - Background: C-type natriuretic peptide (CNP, NPPC) and its receptor, natriuretic peptide receptor-B (NPR-B, NPR2), are critical for endochondral ossification. A monoallelic NPR2 mutation has been suggested to mildly impair long bone growth. This study was performed to identify the NPR2 mutations in Korean patients with idiopathic short stature (ISS). Methods: One hundred and sixteen subjects with nonsyndromic ISS were enrolled in this study, and the NPPC and NPR2 were sequenced. In silico prediction and in vitro functional analysis, using a cell-based assay, were performed to confirm their protein derangement. Results: Mean age at diagnosis of ISS was 8.0 years, and the height z-score was −2.65. Three pathogenic variants (R921Q, R495C, and Y598N) and one benign variant (R787W) of the NPR2 were identified, while no novel sequence variant of the NPPC was found in all subjects. Two novel pathogenic mutants (R495C and Y598N) were predicted as highly pathogenic by several computational methods. In vitro study involving stimulation with CNP, R495C-, and Y598N-transfected cells showed decreased cGMP production compared to wild type-transfected cells. Conclusion: Heterozygous NPR2 mutations were found in 2.6% of ISS Korean subjects. This prevalence and the dominant-negative effect of mutant NPR-B on growth signals imply that it is one of genetic causes of ISS.
AB - Background: C-type natriuretic peptide (CNP, NPPC) and its receptor, natriuretic peptide receptor-B (NPR-B, NPR2), are critical for endochondral ossification. A monoallelic NPR2 mutation has been suggested to mildly impair long bone growth. This study was performed to identify the NPR2 mutations in Korean patients with idiopathic short stature (ISS). Methods: One hundred and sixteen subjects with nonsyndromic ISS were enrolled in this study, and the NPPC and NPR2 were sequenced. In silico prediction and in vitro functional analysis, using a cell-based assay, were performed to confirm their protein derangement. Results: Mean age at diagnosis of ISS was 8.0 years, and the height z-score was −2.65. Three pathogenic variants (R921Q, R495C, and Y598N) and one benign variant (R787W) of the NPR2 were identified, while no novel sequence variant of the NPPC was found in all subjects. Two novel pathogenic mutants (R495C and Y598N) were predicted as highly pathogenic by several computational methods. In vitro study involving stimulation with CNP, R495C-, and Y598N-transfected cells showed decreased cGMP production compared to wild type-transfected cells. Conclusion: Heterozygous NPR2 mutations were found in 2.6% of ISS Korean subjects. This prevalence and the dominant-negative effect of mutant NPR-B on growth signals imply that it is one of genetic causes of ISS.
KW - NPR2
KW - idiopathic short stature
KW - natriuretic peptide receptor-B
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U2 - 10.1002/mgg3.1146
DO - 10.1002/mgg3.1146
M3 - Article
C2 - 31960617
AN - SCOPUS:85078664256
SN - 2324-9269
VL - 8
JO - Molecular Genetics and Genomic Medicine
JF - Molecular Genetics and Genomic Medicine
IS - 3
M1 - e1146
ER -