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  • Author: Fang Jiang x
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Ning Zhang, Yu-Hua Shi, Cui-Fang Hao, Harvest F Gu, Yuan Li, Yue-Ran Zhao, Lai-Cheng Wang and Zi-Jiang Chen

Objective

Polycystic ovary syndrome (PCOS) is frequently associated with insulin resistance (IR) and consequently with increased risk of metabolic disorders. Adiponectin is the most abundant adipocytokine and may play a role in the regulation of insulin sensitivity and IR in PCOS. The aim of the present study was to evaluate the genetic influence of the adiponectin (ADIPOQ) gene polymorphisms in the development of PCOS among Han Chinese women.

Methods

Two single nucleotide polymorphisms (SNPs),+45G15G(T/G) and +276(G/T), in the ADIPOQ gene were genotyped in 120 patients with PCOS and 120 healthy control subjects. All of them were Han Chinese women.

Results

Both SNPs were found to be significantly associated with PCOS (P=0.021, odds ratios=1.629, 95% confidence intervals: 1.074–2.469 and P=0.015, 1.576, 1.091–2.279 respectively). In SNP +276(G/T), the allele G was found to be significantly associated with increased fasting insulin levels, homeostasis model assessment to assess IR index, and area under the curve glucose levels, but decreased glucose and insulin ratio in the PCOS patients. Furthermore, the patients carrying genotypes G/G and G/T had significantly decreased levels of serum adiponectin (6.16±3.18 plus 5.93±3.23 vs 8.96±3.21 μg/ml, P=0.030) compared with the patients with genotype T/T.

Conclusions

The present study provides evidence that SNPs +45G15G(T/G) and +276(G/T) in the ADIPOQ gene are associated with PCOS in Han Chinese women. SNP +276(G/T) may contribute to an impact of insulin levels and IR, which are implicated in the susceptibility for PCOS.

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Qiao Hou, Jiayu Wu, Yaguang Zhao, Xinying Wang, Fang Jiang, Dan-Na Chen, Ruizhi Zheng, Meichao Men and Jia-Da Li

Objective:

To identify CCDC141 variants in a large Chinese cohort with congenital hypogonadotropic hypogonadism (CHH) and to assess the contribution of CCDC141 to CHH.

Design:

Detailed phenotyping was conducted in CHH patients with CCDC141 variants and co-segregation analysis was performed, when possible.

Methods:

Whole-exome sequencing was performed in 177 CHH patients and 450 unrelated, ethnically matched controls from China.

Results:

Seven novel CCDC141 rare sequencing variants (RSVs) were identified in 12 CHH pedigrees. Four of the variants were private mutations; however, p.Q409X, p.Q871X and p.G1488S were identified in more than one patient. Up to 75% (9/12) of patients had mutations in other CHH-associated genes, which is significantly higher than CHH patients without CCDC141 RSVs. The co-segregation analysis for eight CHH families showed that 75% (6/8) CCDC141 RSVs were inherited from their fertile parents. Over half (58.3%, 8/18) of the patients exhibited other clinical deformities in addition to hypogonadism. One patient harbouring a CCDC141 RSV showed a reversal of CHH after sex-steroid replacement.

Conclusions:

Our results broaden the genotypic spectrum of CCDC141 in CHH, as CCDC141 RSVs alone do not appear sufficient to cause CHH. The phenotypic spectrum in patients with CCDC141 RSVs is much wider than originally believed.