Dataset Information

Variation analysis of PUM1 gene in Chinese women with primary ovarian insufficiency.

ABSTRACT: Accumulating evidence has indicated that the genes involved in meiosis are highly correlated with ovarian function. Pumilio 1 (PUM1) is a RNA-binding protein which is involved in the meiotic process. It has been reported that the Pum1 knockout female mice displayed subfertility due to the decrease in primordial follicle pool. The aim of our study is to investigate whether variants of the PUM1 gene are responsible for primary ovarian insufficiency (POI) in Chinese women. We analyzed coding sequence and untranslated regions of the PUM1 gene in 196 Han Chinese women with non-syndromic POI and 192 controls. Seven novel variants were identified, but one of them was synonymous and six were intronic. Besides, seven known single-nucleotide polymorphisms (SNPs) were found, and there were no significant differences in genotype and allele frequencies of the SNPs between patients and controls. The results suggest that the variants in PUM1 may not contribute to POI in Han Chinese women.

SUBMITTER: Luo W

PROVIDER: S-EPMC5949103 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature

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Variation analysis of PUM1 gene in Chinese women with primary ovarian insufficiency.

Luo Wei W Ke Hanni H Liu Ran R Qin Yingying Y Mak Winifred W Ma Jinlong J Zhao Shidou S Chen Zi-Jiang ZJ

Journal of assisted reproduction and genetics 20180103 4

Accumulating evidence has indicated that the genes involved in meiosis are highly correlated with ovarian function. Pumilio 1 (PUM1) is a RNA-binding protein which is involved in the meiotic process. It has been reported that the Pum1 knockout female mice displayed subfertility due to the decrease in primordial follicle pool. The aim of our study is to investigate whether variants of the PUM1 gene are responsible for primary ovarian insufficiency (POI) in Chinese women. We analyzed coding sequen ...[more]

PMID: 29297114

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Project description:Study questionWhat is the prevalence of somatic chromosomal instability among women with idiopathic primary ovarian insufficiency (POI)?Summary answerA subset of women with idiopathic POI may have functional impairment in DNA repair leading to chromosomal instability in their soma.What is known alreadyThe formation and repair of DNA double-strand breaks during meiotic recombination are fundamental processes of gametogenesis. Oocytes with compromised DNA integrity are susceptible to apoptosis which could trigger premature ovarian aging and accelerated wastage of the human follicle reserve. Genomewide association studies, as well as whole exome sequencing, have implicated multiple genes involved in DNA damage repair. However, the prevalence of defective DNA damage repair in the soma of women with POI is unknown.Study design, size, durationIn total, 46 women with POI and 15 family members were evaluated for excessive mitomycin-C (MMC)-induced chromosome breakage. Healthy fertile females (n = 20) and two lymphoblastoid cell lines served as negative and as positive controls, respectively.Participants/materials, setting, methodsWe performed a pilot functional study utilizing MMC to assess chromosomal instability in the peripheral blood of participants. A high-resolution array comparative genomic hybridization (aCGH) was performed on 16 POI patients to identify copy number variations (CNVs) for a set of 341 targeted genes implicated in DNA repair.Main results and the role of chanceArray CGH revealed three POI patients (3/16, 18.8%) with pathogenic CNVs. Excessive chromosomal breakage suggestive of a constitutional deficiency in DNA repair was detected in one POI patient with the 16p12.3 duplication. In two patients with negative chromosome breakage analysis, aCGH detected a Xq28 deletion comprising the Centrin EF-hand Protein 2 (CETN2) and HAUS Augmin Like Complex Subunit 7 (HAUS7) genes essential for meiotic DNA repair, and a duplication in the 3p22.2 region comprising a part of the ATPase domain of the MutL Homolog 1 (MLH1) gene.Limitations reasons for cautionPeripheral lymphocytes, used as a surrogate tissue to quantify induced chromosome damage, may not be representative of all the affected tissues. Another limitation pertains to the MMC assay which detects homologous repair pathway defects and does not test deficiencies in other DNA repair pathways.Wider implications of the findingsOur results provide evidence for functional impairment of DNA repair in idiopathic POI, which may predispose the patients to other DNA repair-related conditions such as accelerated aging and/or cancer susceptibility.Study funding/competing interest(s)Funding was provided by the National Institute of Child Health and Human Development. There were no competing interests to declare.

Dataset Information

Variation analysis of PUM1 gene in Chinese women with primary ovarian insufficiency.

Publications

Variation analysis of PUM1 gene in Chinese women with primary ovarian insufficiency.

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