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Zhang C, Yu J. FTO gene polymorphism and susceptibility to polycystic ovary syndrome: A meta-analysis. J Obstet Gynaecol Res 2024. [PMID: 39143730 DOI: 10.1111/jog.16047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Accepted: 07/25/2024] [Indexed: 08/16/2024]
Abstract
AIM To explore the correlation between Fat mass and objectivity associated gene (FTO) rs9939609 polymorphism and susceptibility to polycystic ovary syndrome. METHODS Case-control studies on the relationship between FTO rs9939609 A/T polymorphism and PCOS were searched in PubMed, EMBASE, and Web of Science according to inclusion and exclusion criteria. STATA 12.0 software was conducted for Meta-analysis. RESULTS Nine case-control studies were included, including 1410 cases in PCOS group and 1223 cases in healthy control group. The results of meta-analysis showed that FTO rs9939609 gene polymorphism was associated with PCOS susceptibility, and the risk of developing PCOS was 1.19 times higher for T alleles carriers than for A alleles carriers, and some similar associations were observed in Asian populations. CONCLUSIONS In summary, FTO rs9939609 gene polymorphism is significantly associated with PCOS susceptibility, especially in Asian populations.
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Affiliation(s)
- Chuanhua Zhang
- Department of Gynecology, Huzhou Third Municipal Hospital, The Affiliated Hospital of Huzhou University, Huzhou, China
| | - Jiali Yu
- Department of Gynecology and Obstetrics, Yiwu Central Hospital, Yiwu, China
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Yin D, Li Y, Liao X, Tian D, Xu Y, Zhou C, Liu J, Li S, Zhou J, Nie Y, Liao H, Peng C. FTO: a critical role in obesity and obesity-related diseases. Br J Nutr 2023; 130:1657-1664. [PMID: 36944362 DOI: 10.1017/s0007114523000764] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
In recent years, obesity is a growing pandemic in the world and has likely contributed to increasing the incidence of obesity-related diseases. Fat mass and obesity-associated gene (FTO) is the first gene discovered which has a close connection with fat. Recent studies suggested that FTO gene has played an important role in the molecular mechanisms of many diseases. Obesity is considered to be a hereditary disease and can evoke many kinds of diseases, including polycystic ovary syndrome (PCOS), type 2 diabetes mellitus (T2DM), cancer, etc., whose exact possible molecular mechanisms responsible for the effect of FTO on obesity and obesity-related diseases remain largely unknown. In this review, we comprehensively discuss the correlation between FTO gene and obesity, cancer, PCOS, T2DM, as well as the molecular mechanism involved in these diseases.
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Affiliation(s)
- Dan Yin
- Department of Cell Biology and Genetics, Institute of Cytology and Genetics, School of Basic Medical Sciences, Hengyang Medical School, Key Laboratory of Ecological Environment and Critical Human Diseases Prevention of Hunan Province Department of Education, Key Laboratory of Hengyang City on Biological Toxicology and Ecological Restoration, Key Laboratory of Typical Environmental Pollution and Health Hazards, University of South China, Hengyang, Hunan421001, People's Republic of China
| | - Yiyang Li
- Department of Cell Biology and Genetics, Institute of Cytology and Genetics, School of Basic Medical Sciences, Hengyang Medical School, Key Laboratory of Ecological Environment and Critical Human Diseases Prevention of Hunan Province Department of Education, Key Laboratory of Hengyang City on Biological Toxicology and Ecological Restoration, Key Laboratory of Typical Environmental Pollution and Health Hazards, University of South China, Hengyang, Hunan421001, People's Republic of China
| | - Xingyue Liao
- Department of Cell Biology and Genetics, Institute of Cytology and Genetics, School of Basic Medical Sciences, Hengyang Medical School, Key Laboratory of Ecological Environment and Critical Human Diseases Prevention of Hunan Province Department of Education, Key Laboratory of Hengyang City on Biological Toxicology and Ecological Restoration, Key Laboratory of Typical Environmental Pollution and Health Hazards, University of South China, Hengyang, Hunan421001, People's Republic of China
| | - Dewei Tian
- Department of Cell Biology and Genetics, Institute of Cytology and Genetics, School of Basic Medical Sciences, Hengyang Medical School, Key Laboratory of Ecological Environment and Critical Human Diseases Prevention of Hunan Province Department of Education, Key Laboratory of Hengyang City on Biological Toxicology and Ecological Restoration, Key Laboratory of Typical Environmental Pollution and Health Hazards, University of South China, Hengyang, Hunan421001, People's Republic of China
| | - Yunsi Xu
- Department of Cell Biology and Genetics, Institute of Cytology and Genetics, School of Basic Medical Sciences, Hengyang Medical School, Key Laboratory of Ecological Environment and Critical Human Diseases Prevention of Hunan Province Department of Education, Key Laboratory of Hengyang City on Biological Toxicology and Ecological Restoration, Key Laboratory of Typical Environmental Pollution and Health Hazards, University of South China, Hengyang, Hunan421001, People's Republic of China
| | - Cuilan Zhou
- Department of Cell Biology and Genetics, Institute of Cytology and Genetics, School of Basic Medical Sciences, Hengyang Medical School, Key Laboratory of Ecological Environment and Critical Human Diseases Prevention of Hunan Province Department of Education, Key Laboratory of Hengyang City on Biological Toxicology and Ecological Restoration, Key Laboratory of Typical Environmental Pollution and Health Hazards, University of South China, Hengyang, Hunan421001, People's Republic of China
| | - Jun Liu
- Department of Cell Biology and Genetics, Institute of Cytology and Genetics, School of Basic Medical Sciences, Hengyang Medical School, Key Laboratory of Ecological Environment and Critical Human Diseases Prevention of Hunan Province Department of Education, Key Laboratory of Hengyang City on Biological Toxicology and Ecological Restoration, Key Laboratory of Typical Environmental Pollution and Health Hazards, University of South China, Hengyang, Hunan421001, People's Republic of China
| | - Suyun Li
- Department of Cell Biology and Genetics, Institute of Cytology and Genetics, School of Basic Medical Sciences, Hengyang Medical School, Key Laboratory of Ecological Environment and Critical Human Diseases Prevention of Hunan Province Department of Education, Key Laboratory of Hengyang City on Biological Toxicology and Ecological Restoration, Key Laboratory of Typical Environmental Pollution and Health Hazards, University of South China, Hengyang, Hunan421001, People's Republic of China
| | - Jing Zhou
- Department of Obstetrics and Gynecology, the Second Affiliated Hospital, University of South China, 30# Jiefang Road, Hengyang, Hunan421001, People's Republic of China
| | - Yulin Nie
- Department of Obstetrics and Gynecology, the Second Affiliated Hospital, University of South China, 30# Jiefang Road, Hengyang, Hunan421001, People's Republic of China
| | - Hongqing Liao
- Department of Obstetrics and Gynecology, the Second Affiliated Hospital, University of South China, 30# Jiefang Road, Hengyang, Hunan421001, People's Republic of China
| | - Cuiying Peng
- Department of Cell Biology and Genetics, Institute of Cytology and Genetics, School of Basic Medical Sciences, Hengyang Medical School, Key Laboratory of Ecological Environment and Critical Human Diseases Prevention of Hunan Province Department of Education, Key Laboratory of Hengyang City on Biological Toxicology and Ecological Restoration, Key Laboratory of Typical Environmental Pollution and Health Hazards, University of South China, Hengyang, Hunan421001, People's Republic of China
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Chaudhary H, Patel J, Jain NK, Panchal S, Laddha N, Joshi R. Association of FTO gene variant rs9939609 with polycystic ovary syndrome from Gujarat, India. BMC Med Genomics 2023; 16:216. [PMID: 37710301 PMCID: PMC10500741 DOI: 10.1186/s12920-023-01654-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 09/01/2023] [Indexed: 09/16/2023] Open
Abstract
BACKGROUND Polycystic ovary syndrome is a multifactorial endocrine disorder impacting women of reproductive age. Variations within the FTO gene have been linked to both obesity and type 2 diabetes mellitus. Given that PCOS is frequently associated with obesity and compromised glucose tolerance, we investigated the prevalence of the rs9939609 variant within the FTO gene among women diagnosed with PCOS and a control group. Our aim is to uncover potential correlations between this genetic variant, metabolic attributes, and endocrine markers within the Gujarat province of India. METHOD We enrolled a total of 114 participants, (62 individuals diagnosed with PCOS and 52 healthy controls). DNA extraction from venous blood was conducted for all participants. The rs9939609 polymorphism was investigated through tetra-primer amplification refractory mutation system-polymerase chain reaction. Furthermore, we performed biochemical assessments to quantify levels of estradiol, luteinizing hormone (LH), follicle-stimulating hormone (FSH), thyroid-stimulating hormone (TSH), total testosterone, prolactin (PRL), and Dehydroepiandrosterone sulfate (DHEAS). Statistical analyses were carried out utilizing SPSS version 21 (IBM, USA). RESULTS The present study did not reveal any noteworthy association between cases and controls. The frequencies of genotypes and alleles within the cohorts displayed no statistically significant differences (p = 0.25, p = 0.68, and p = 0.78, respectively). The dominant model indicated a modest risk (OR:1.13, 95%CI: 0.55 to 2.38) toward PCOS development. There was a noticeable statistical difference observed in the levels of total testosterone, DHEAS, and BMI between the case and control groups (p < 0.002, p < 0.0002, p < 0.0008). However, no variations in clinical variables were observed among genotypes within the PCOS group. CONCLUSION This is the first study to investigate the association of FTO gene polymorphism and PCOS in Gujarati population. Our study findings indicate that the FTO gene variant is not directly linked to the onset of PCOS. However, it appears to exert an influence on metabolic factors such as obesity and insulin resistance. Notably, our results suggest that insulin resistance is more frequently observed among PCOS patients who are obese, as compared to those with non-obese PCOS patients.
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Affiliation(s)
- Hiral Chaudhary
- Department of Biochemistry and Forensic Science, University School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
| | - Jalpa Patel
- Department of Biochemistry and Forensic Science, University School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
| | - Nayan K Jain
- Department of Life Science, University School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
| | - Sonal Panchal
- Dr. Nagori's Institute for Infertility and IVF, Ahmedabad, Gujarat, India
| | - Naresh Laddha
- In Vitro Specialty Lab Pvt Ltd, Navrangpura, Ahmedabad, 380009, Gujarat, India
| | - Rushikesh Joshi
- Department of Biochemistry and Forensic Science, University School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India.
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Almawi WY, Nemr R, Atazhanova T, Malalla ZH, Sarray S, Mustafa FE, Mahmood NA. Differential Association of FTO Gene variants and Haplotypes with the Susceptibility to Polycystic Ovary Syndrome According To Obesity in Women with PCOS. Reprod Sci 2023; 30:2166-2176. [PMID: 36602653 DOI: 10.1007/s43032-022-01149-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 12/11/2022] [Indexed: 01/06/2023]
Abstract
We explored the relation between FTO single gene variants (rs1861868, rs9939973, rs1421085, rs1121980, rs17817449, rs8050136, rs9939609, rs9930506, and rs8044769) and polycystic ovary syndrome (PCOS), in particular, according to the obesity status. This retrospective population-based case-control study involved women with PCOS (583) and 713 eumenorrheic control women; genotyping was done by real-time PCR. Significantly higher minor allele frequency (MAF) of rs9939973, rs17817449, rs9939609, and rs9930506 and lower MAF of rs1121980 were seen in PCOS cases. Lower risk of PCOS was associated with rs1121980 and rs8050136 heterozygous and minor allele-homozygous genotypes, while an elevated risk of PCOS was seen with minor allele-homozygous rs9939973, rs17817449, and r9939609 heterozygous and genotypes and minor allele-homozygous rs9930506 and rs8044769 genotype. While none of the tested FTO SNPs variants was associated with PCOS in normal body weight/lean subjects, rs9939973, rs9939609, and rs9930506 were negatively associated with PCOS in overweight subjects. In comparison, rs1861868 was negatively, while rs8044769 was positively associated with PCOS in obese subjects. Haplotype analysis identified haplotypes GACCTCTAT, AACCTCTAT, AACCTATAT and AGTTGCAGC, and GACCTCTAC to be positively associated with PCOS, while haplotypes GGTTGAAGC, GACCTATAT, GGTTGCAGC, and GATCTATAT were negatively associated with PCOS. Apart from GGTTGAAGC, these haplotypes remained associated with altered risk of PCOS after adjusting for covariates. In addition to rs17817449, rs9939609, rs9930506, and rs1121980, this study is the first to demonstrate association of rs9939973 and rs8044769 with altered risk of PCOS and the first to confirm the BMI dependency on the association of FTO variants with PCOS. This underscores the role of FTO gene variants as predisposing factors of PCOS.
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Affiliation(s)
- Wassim Y Almawi
- School of Medicine, Nazarbayev University, Astana, Kazakhstan.
- Department of Biological Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada.
| | - Rita Nemr
- School of Medicine, Lebanese American University, Beirut, Lebanon
| | | | - Zainab H Malalla
- Department of Medical Biochemistry, Arabian Gulf University, Manama, Bahrain
| | - Sameh Sarray
- Department of Medical Biochemistry, Arabian Gulf University, Manama, Bahrain
| | - Fekria E Mustafa
- Department of Obstetrics and Gynecology, Salmaniya Medical Complex, Manama, Bahrain
| | - Naeema A Mahmood
- Department of Obstetrics and Gynecology, Salmaniya Medical Complex, Manama, Bahrain
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Yang J, Wang E, Jiang M, Tan Y, Yao F, Sun C, Pan L, Gao L, Yao J. Integrated fecal microbiota and metabolomics analysis of the orlistat intervention effect on polycystic ovary syndrome rats induced by letrozole combined with a high-fat diet. J Ovarian Res 2023; 16:109. [PMID: 37277785 DOI: 10.1186/s13048-023-01193-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 05/24/2023] [Indexed: 06/07/2023] Open
Abstract
BACKGROUND This study aimed to compare the characteristics of the gut microbiota and their metabolite profiles between polycystic ovary syndrome (PCOS) and orlistat-treated PCOS rats (ORL-PCOS), which could help to better understand the underlying mechanism of the effect of orlistat on PCOS. METHODS PCOS rat models were established using letrozole combined with a high-fat diet. Ten rats were randomly selected as a PCOS control group (PCOS). The other three groups (n = 10/group) were additionally supplemented with different doses of orlistat (low, medium, high). Then, fecal samples of the PCOS and ORL-PCOS groups were analysed by 16S rRNA gene sequencing and untargeted metabolomics. Blood samples were collected to detect serum sex hormones and lipids. RESULTS The results showed that orlistat attenuated the body weight gain, decreased the levels of T, LH, the LH/FSH ratio, TC, TG and LDL-C; increased the level of E2; and improved estrous cycle disorder in PCOS rats. The bacterial richness and diversity of the gut microbiota in the ORL-PCOS group were higher than those in the PCOS group. The ratio of Firmicutes to Bacteroidetes was decreased with orlistat treatment. Moreover, orlistat treatment led to a significant decrease in the relative abundance of Ruminococcaceae and Lactobacillaceae, and increases in the abundances of Muribaculaceae and Bacteroidaceae. Metabolic analysis identified 216 differential fecal metabolites in total and 6 enriched KEGG pathways between the two groups, including steroid hormone biosynthesis, neuroactive ligand-receptor interaction and vitamin digestion and absorption. Steroid hormone biosynthesis was the pathway with the most significant enrichment. The correlations between the gut microbiota and differential metabolites were calculated, which may provide a basis for understanding the composition and function of microbial communities. CONCLUSIONS Our data suggested that orlistat exerts a PCOS treatment effect, which may be mediated by modifying the structure and composition of the gut microbiota, as well as the metabolite profiles of PCOS rats.
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Affiliation(s)
- Jianmei Yang
- Department of Pediatric Endocrinology, Shandong Provincial Hospital, Shandong University, Jinan, 250021, Shandong, China
- State Key Laboratory of Integration and Innovation of Classic Formula and Modern Chinese Medicine, Lunan Pharmaceutical Group Co. Ltd., Linyi, 276006, Shandong, China
- Department of Pediatric Endocrinology, Shandong Provincial Hospital affiliated to Shandong First Medical University, Jinan, 250021, Shandong, China
| | - Enli Wang
- State Key Laboratory of Integration and Innovation of Classic Formula and Modern Chinese Medicine, Lunan Pharmaceutical Group Co. Ltd., Linyi, 276006, Shandong, China
| | - Mingmin Jiang
- State Key Laboratory of Integration and Innovation of Classic Formula and Modern Chinese Medicine, Lunan Pharmaceutical Group Co. Ltd., Linyi, 276006, Shandong, China
| | - Yujun Tan
- State Key Laboratory of Integration and Innovation of Classic Formula and Modern Chinese Medicine, Lunan Pharmaceutical Group Co. Ltd., Linyi, 276006, Shandong, China
| | - Fangfang Yao
- State Key Laboratory of Integration and Innovation of Classic Formula and Modern Chinese Medicine, Lunan Pharmaceutical Group Co. Ltd., Linyi, 276006, Shandong, China
| | - Chenghong Sun
- State Key Laboratory of Integration and Innovation of Classic Formula and Modern Chinese Medicine, Lunan Pharmaceutical Group Co. Ltd., Linyi, 276006, Shandong, China
| | - Lihong Pan
- State Key Laboratory of Integration and Innovation of Classic Formula and Modern Chinese Medicine, Lunan Pharmaceutical Group Co. Ltd., Linyi, 276006, Shandong, China
| | - Ling Gao
- Scientific Center, Shandong Provincial Hospital, Shandong University, Jinan, 250021, Shandong, China
| | - Jingchun Yao
- State Key Laboratory of Integration and Innovation of Classic Formula and Modern Chinese Medicine, Lunan Pharmaceutical Group Co. Ltd., Linyi, 276006, Shandong, China.
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Rani S, Chandna P. Multiomics Analysis-Based Biomarkers in Diagnosis of Polycystic Ovary Syndrome. Reprod Sci 2023; 30:1-27. [PMID: 35084716 PMCID: PMC10010205 DOI: 10.1007/s43032-022-00863-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 01/20/2022] [Indexed: 01/06/2023]
Abstract
Polycystic ovarian syndrome is an utmost communal endocrine, psychological, reproductive, and metabolic disorder that occurs in women of reproductive age with extensive range of clinical manifestations. This may even lead to long-term multiple morbidities including obesity, diabetes mellitus, insulin resistance, cardiovascular disease, infertility, cerebrovascular diseases, and ovarian and endometrial cancer. Women affliction from PCOS in midst assemblage of manifestations allied with menstrual dysfunction and androgen exorbitance, which considerably affects eminence of life. PCOS is recognized as a multifactorial disorder and systemic syndrome in first-degree family members; therefore, the etiology of PCOS syndrome has not been copiously interpreted. The disorder of PCOS comprehends numerous allied health conditions and has influenced various metabolic processes. Due to multifaceted pathophysiology engaging several pathways and proteins, single genetic diagnostic tests cannot be supportive to determine in straight way. Clarification of cellular and biochemical pathways and various genetic players underlying PCOS could upsurge our consideration of pathophysiology of this syndrome. It is requisite to know pathophysiological relationship between biomarker and their reflection towards PCOS disease. Biomarkers deliver vibrantly and potent ways to apprehend the spectrum of PCOS with applications in screening, diagnosis, characterization, and monitoring. This paper relies on the endeavor to point out many candidates as potential biomarkers based on omics technologies, thus highlighting correlation between PCOS disease with innovative technologies. Therefore, the objective of existing review is to encapsulate more findings towards cutting-edge advances in prospective use of biomarkers for PCOS disease. Discussed biomarkers may be fruitful in guiding therapies, addressing disease risk, and predicting clinical outcomes in future.
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Affiliation(s)
- Shikha Rani
- Department of Biophysics, University of Delhi, South Campus, Benito Juarez Road, New Delhi , 110021, India.
| | - Piyush Chandna
- Natdynamics Biosciences Confederation, Gurgaon, Haryana, 122001, India
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Kumar A, Sakhare K, Bhattacharya D, Chattopadhyay R, Parikh P, Narayan KP, Mukherjee A. Communication in non-communicable diseases (NCDs) and role of immunomodulatory nutraceuticals in their management. Front Nutr 2022; 9:966152. [PMID: 36211513 PMCID: PMC9532975 DOI: 10.3389/fnut.2022.966152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 08/11/2022] [Indexed: 12/24/2022] Open
Abstract
Conveyance of pathogens between organisms causes communicable diseases. On the other hand, a non-communicable disease (NCD) was always thought to have no causative transmissible infective agents. Today, this clear distinction is increasingly getting blurred and NCDs are found to be associated with some transmissible components. The human microbiota carries a congregation of microbes, the majority and the most widely studied being bacteria in the gut. The adult human gut harbors ginormous inhabitant microbes, and the microbiome accommodates 150-fold more genes than the host genome. Microbial communities share a mutually beneficial relationship with the host, especially with respect to host physiology including digestion, immune responses, and metabolism. This review delineates the connection between environmental factors such as infections leading to gut dysbiosis and NCDs and explores the evidence regarding possible causal link between them. We also discuss the evidence regarding the value of appropriate therapeutic immunomodulatory nutritional interventions to reduce the development of such diseases. We behold such immunomodulatory effects have the potential to influence in various NCDs and restore homeostasis. We believe that the beginning of the era of microbiota-oriented personalized treatment modalities is not far away.
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Affiliation(s)
- Abhiram Kumar
- Esperer Onco Nutrition Pvt. Ltd., Mumbai, India
- Department of Biological Sciences, Birla Institute of Technology and Science – Pilani, Hyderabad, India
| | - Kalyani Sakhare
- Department of Biological Sciences, Birla Institute of Technology and Science – Pilani, Hyderabad, India
| | - Dwaipayan Bhattacharya
- Department of Biological Sciences, Birla Institute of Technology and Science – Pilani, Hyderabad, India
| | | | - Purvish Parikh
- Department of Clinical Haematology, Mahatma Gandhi Medical College and Hospital, Jaipur, India
| | - Kumar P. Narayan
- Department of Biological Sciences, Birla Institute of Technology and Science – Pilani, Hyderabad, India
- *Correspondence: Kumar P. Narayan,
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Naghshband Z, Malini SS. Association of FTO gene variant rs9939609 with hyperandrogenemia and fasting glucose levels in South Indian women with polycystic ovarian syndrome. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2022. [DOI: 10.1186/s43042-022-00236-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Polycystic ovary syndrome (PCOS) is a common endocrine–metabolic disorder due to genetic and environmental factors. Genetic variants located in intron 1 of Fat mass and obesity-associated (FTO) gene are associated with increased risk of obesity and metabolic disorders. This study aims to investigate the association of common FTO polymorphism rs9939609 in South Indian women with PCOS to assess its association with metabolic and endocrine parameters. FTO genotyping was done on 100 PCOS patients and 70 controls by Sanger sequencing.
Results
The distribution of rs9939609 was observed between groups (28% TT, 57% TA, and 15% AA for PCOS and 37.1% TT, 51.4% TA, and 11.4% AA for the controls). In the PCOS group, across the carriers of different genotypes, a significant association was found between body mass index (BMI), fasting glucose levels, and testosterone with the presence of at least one risk allele of FTO rs9939609. Logistic regression analysis showed the association of fasting glucose levels and testosterone (OR 1.30 [1.03–1.63] and OR 5.83 [1.61–21.11], respectively) with FTO rs9939609.
Conclusions
Our findings indicated that FTO SNP rs9939609 was not associated with PCOS, but suggested a significant association of rs9939609 with hyperandrogenemia, fasting glucose levels, and BMI in South Indian women with PCOS.
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Alnafjan AA, Alkhuriji AF, Alobaid HM, Babay ZA, Khalil MI. Association of FTO gene variants rs9939609 and rs1421085 with polycystic ovary syndrome. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2022. [DOI: 10.1186/s43042-022-00263-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Polycystic ovary syndrome (PCOS) is among the most common complex genetic endocrinopathy, and its etiology and pathophysiology remain controversial. FTO is a large highly polymorphic gene and was coined as the first locus associated with adiposity. The association of the intronic variant FTO rs9939609 or FTO rs1421085 with PCOS has been controversial and unclear, mainly due to ethnic differences among populations. The present study aims to investigate the association of FTO rs9939609 or FTO rs1421085 polymorphisms with PCOS in Saudi Arabian women.
Results
A total of 98 PCOS patients and 99 healthy females were included in this study. PCR and genotyping (TaqMan®SNP Genotyping Assay) were employed. For FTO rs9939609, the genotype TA and the recessive model (TA + AA) in PCOS patients were significantly different compared with control subjects (p = 0.008 and p = 0.007, respectively). The allele frequency of the FTO rs9939609 gene variant was associated significantly (p = 0.027) with PCOS, suggesting that the A allele is a risk factor for PCOS susceptibility. However, for the FTO rs1421085 variant, the genotype and allele distributions did not differ significantly between PCOS patients and controls (p > 0.05).
Conclusions
This is the first report to study the association of FTO rs9939609 and FTO rs1421085 with PCOS in Saudi women. Results suggest that the FTO rs9939609 gene variant could be a genetic predisposing factor for PCOS Saudi women.
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Barber TM, Franks S. Obesity and polycystic ovary syndrome. Clin Endocrinol (Oxf) 2021; 95:531-541. [PMID: 33460482 DOI: 10.1111/cen.14421] [Citation(s) in RCA: 84] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 12/02/2020] [Accepted: 01/14/2021] [Indexed: 02/06/2023]
Abstract
The increased global prevalence of obesity over the last 40-years has driven a rise in prevalence of obesity-related co-morbidities, including polycystic ovary syndrome (PCOS). On a background of genetic susceptibility, PCOS often becomes clinically manifest following weight gain, commonly during adolescence. A common endocrinopathy affecting between 6%-10% of reproductive-age women, PCOS presents with the cardinal features of hyperandrogenism, reproductive and metabolic dysfunction. PCOS associates with insulin resistance, independently of (but amplified by) obesity. Insulin resistance in PCOS is characterized by abnormal post-receptor signalling within the phosphatidylinositol-kinase (PI3-K) pathway. Multiple factors (including most notably, weight gain) contribute towards the severity of insulin resistance in PCOS. Compensatory hyperinsulinaemia ensues, resulting in over-stimulation of the (intact) post-receptor mitogen-activated protein kinase (MAP-K) insulin pathway, with consequent implications for steroidogenesis and ovarian function. In this concise review, we explore the effects of weight gain and obesity on the pathogenesis of PCOS from the perspective of its three cardinal features of hyperandrogenism, reproductive and metabolic dysfunction, with a focus on the central mediating role of the insulin pathway. We also consider key lifestyle strategies for the effective management of obese and overweight women with PCOS.
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Affiliation(s)
- Thomas M Barber
- Warwickshire Institute for the Study of Diabetes, Endocrinology and Metabolism, University Hospitals Coventry and Warwickshire, Coventry, UK
- Warwick Medical School, University of Warwick, Coventry, UK
| | - Stephen Franks
- Institute of Reproductive & Developmental Biology, Department of Metabolism, Digestion & Reproduction, Imperial College London, London, UK
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Chaudhary H, Patel J, Jain NK, Joshi R. The role of polymorphism in various potential genes on polycystic ovary syndrome susceptibility and pathogenesis. J Ovarian Res 2021; 14:125. [PMID: 34563259 PMCID: PMC8466925 DOI: 10.1186/s13048-021-00879-w] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 09/09/2021] [Indexed: 12/27/2022] Open
Abstract
Polycystic ovary syndrome (PCOS) is the most common endocrinopathies affecting the early reproductive age in women, whose pathophysiology perplexes many researchers till today. This syndrome is classically categorized by hyperandrogenism and/or hyperandrogenemia, menstrual and ovulatory dysfunction, bulky multi follicular ovaries on Ultrasonography (USG), and metabolic abnormalities such as hyperinsulinemia, dyslipidemia, obesity. The etiopathogenesis of PCOS is not fully elucidated, but it seems that the hypothalamus-pituitary-ovarian axis, ovarian, and/or adrenal androgen secretion may contribute to developing the syndrome. Infertility and poor reproductive health in women's lives are highly associated with elevated levels of androgens. Studies with ovarian theca cells taken from PCOS women have demonstrated increased androgen production due to augmented ovarian steroidogenesis attributed to mainly altered expression of critical enzymes (Cytochrome P450 enzymes: CYP17, CYP21, CYP19, CYP11A) in the steroid hormone biosynthesis pathway. Despite the heterogeneity of PCOS, candidate gene studies are the widely used technique to delineate the genetic variants and analyze for the correlation of androgen biosynthesis pathway and those affecting the secretion or action of insulin with PCOS etiology. Linkage and association studies have predicted the relationship between genetic variants and PCOS risk among families or populations. Several genes have been proposed as playing a role in the etiopathogenesis of PCOS, and the presence of mutations and/or polymorphisms has been discovered, which suggests that PCOS has a vital heritable component. The following review summarizes the influence of polymorphisms in crucial genes of the steroidogenesis pathway leading to intraovarian hyperandrogenism which can result in PCOS.
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Affiliation(s)
- Hiral Chaudhary
- Department of Biochemistry and Forensic Science, University School of Sciences, Gujarat University, Ahmedabad, Gujarat 380009 India
| | - Jalpa Patel
- Department of Biochemistry and Forensic Science, University School of Sciences, Gujarat University, Ahmedabad, Gujarat 380009 India
| | - Nayan K. Jain
- Department of Life Science, University School of Sciences, Gujarat University, Ahmedabad, Gujarat 380009 India
| | - Rushikesh Joshi
- Department of Biochemistry and Forensic Science, University School of Sciences, Gujarat University, Ahmedabad, Gujarat 380009 India
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12
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Zhao Y, Xu Y, Wang X, Xu L, Chen J, Gao C, Wu C, Pan D, Zhang Q, Zhou J, Chen R, Wang Z, Zhao H, You L, Cao Y, Li Z, Shi Y. Body Mass Index and Polycystic Ovary Syndrome: A 2-Sample Bidirectional Mendelian Randomization Study. J Clin Endocrinol Metab 2020; 105:5804107. [PMID: 32163573 DOI: 10.1210/clinem/dgaa125] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 03/06/2020] [Indexed: 12/22/2022]
Abstract
BACKGROUND Observational studies have shown a link between elevated body mass index (BMI) and the risk of polycystic ovary syndrome (PCOS). While Mendelian randomization (MR) studies in Europeans have suggested a causal role of increased BMI in PCOS, whether the same role is suggested in Asians has yet to be investigated. We used MR studies to infer causal effects using genetic data from East Asian populations. METHODS AND FINDINGS We performed a 2-sample bidirectional MR analysis using summary statistics from genome-wide association studies (GWAS) of BMI (with up to 173 430 individuals) and PCOS (4386 cases and 8017 controls) in East Asian populations. Seventy-eight single nucleotide polymorphisms (SNPs) correlated with BMI were selected as genetic instrumental variables to estimate the causal effect of BMI on PCOS using the inverse-variance weighted (IVW) method. To test the reliability of the results, further sensitivity analyses included MR-Egger regression, weighted median estimates, and leave-one-out analysis. The IVW analysis indicated a significant association between high BMI and the risk of PCOS (odds ratio per standard deviation higher BMI, 2.208; 95% confidence interval 1.537 to 3.168, P = 1.77 × 10-5). In contrast, the genetic risk of PCOS had no significant effect on BMI. CONCLUSIONS The results of our bidirectional MR study showed that an increase in BMI causes PCOS, while PCOS does not cause an increased BMI. This study provides further genetic support for a link between BMI and PCOS. Further research is needed to interpret the potential mechanisms of this association.
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Affiliation(s)
- Yalin Zhao
- School of Basic Medicine, Qingdao University, China
- The Affiliated Hospital of Qingdao University and Biomedical Sciences Institute of Qingdao University (Qingdao Branch of SJTU Bio-X Institutes), Qingdao University, Qingdao, China
| | - Yuping Xu
- School of Public Health, Anhui Medical University, Hefei, Anhui, China
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, Hefei, Anhui, China
- NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, Hefei, Anhui, China
| | - Xiaomeng Wang
- Department of Obstetrics, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Lin Xu
- Department of Obstetrics, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Jianhua Chen
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Collaborative Innovation Center for Brain Science, Shanghai Jiao Tong University, Shanghai, China
| | - Chengwen Gao
- The Affiliated Hospital of Qingdao University and Biomedical Sciences Institute of Qingdao University (Qingdao Branch of SJTU Bio-X Institutes), Qingdao University, Qingdao, China
| | - Chuanhong Wu
- The Affiliated Hospital of Qingdao University and Biomedical Sciences Institute of Qingdao University (Qingdao Branch of SJTU Bio-X Institutes), Qingdao University, Qingdao, China
| | - Dun Pan
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Collaborative Innovation Center for Brain Science, Shanghai Jiao Tong University, Shanghai, China
| | - Qian Zhang
- The Affiliated Hospital of Qingdao University and Biomedical Sciences Institute of Qingdao University (Qingdao Branch of SJTU Bio-X Institutes), Qingdao University, Qingdao, China
| | - Juan Zhou
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Collaborative Innovation Center for Brain Science, Shanghai Jiao Tong University, Shanghai, China
| | - Ruirui Chen
- School of Basic Medicine, Qingdao University, China
- The Affiliated Hospital of Qingdao University and Biomedical Sciences Institute of Qingdao University (Qingdao Branch of SJTU Bio-X Institutes), Qingdao University, Qingdao, China
| | - Zhuo Wang
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Collaborative Innovation Center for Brain Science, Shanghai Jiao Tong University, Shanghai, China
| | - Han Zhao
- Center for Reproductive Medicine, Shandong University, Jinan, China
| | - Li You
- Center for Reproductive Medicine, Shandong University, Jinan, China
| | - Yunxia Cao
- School of Public Health, Anhui Medical University, Hefei, Anhui, China
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, Hefei, Anhui, China
- NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, Hefei, Anhui, China
| | - Zhiqiang Li
- School of Basic Medicine, Qingdao University, China
- The Affiliated Hospital of Qingdao University and Biomedical Sciences Institute of Qingdao University (Qingdao Branch of SJTU Bio-X Institutes), Qingdao University, Qingdao, China
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Collaborative Innovation Center for Brain Science, Shanghai Jiao Tong University, Shanghai, China
- Institute of Social Cognitive and Behavioral Sciences, Shanghai Jiao Tong University, Shanghai, China
- Institute of Neuropsychiatric Science and Systems Biological Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yongyong Shi
- School of Basic Medicine, Qingdao University, China
- The Affiliated Hospital of Qingdao University and Biomedical Sciences Institute of Qingdao University (Qingdao Branch of SJTU Bio-X Institutes), Qingdao University, Qingdao, China
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Collaborative Innovation Center for Brain Science, Shanghai Jiao Tong University, Shanghai, China
- Institute of Social Cognitive and Behavioral Sciences, Shanghai Jiao Tong University, Shanghai, China
- Institute of Neuropsychiatric Science and Systems Biological Medicine, Shanghai Jiao Tong University, Shanghai, China
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13
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Branavan U, Wijesundera S, Chandrasekaran V, Arambepola C, Wijeyaratne C. In depth analysis of the association of FTO SNP (rs9939609) with the expression of classical phenotype of PCOS: a Sri Lankan study. BMC MEDICAL GENETICS 2020; 21:30. [PMID: 32050935 PMCID: PMC7017608 DOI: 10.1186/s12881-020-0961-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 01/23/2020] [Indexed: 12/28/2022]
Abstract
Background PCOS is a common disorder of women due to genetic, endocrine and environmental effects that manifests from puberty. The rs9939609 variant of fat mass and obesity associated (FTO) gene is linked to metabolic derangement in PCOS. We previously identified FTO (rs9939609) as a susceptibility locus for PCOS among Sri Lankan women and also explored the role of kisspeptin. Associated factors of the FTO candidate gene among South Asians with PCOS are unknown. Methods This study aimed to determine the association between FTO (rs9939609) polymorphism with clinical (BMI, acanthosis nigricans, hirsutism) and biochemical (serum kisspeptin and testosterone levels) characteristics of PCOS in a cohort of Sri Lankan women. Genetic and clinical data including serum kisspeptin and testosterone concentrations of our previously reported cases (n = 55) and controls (n = 110) were re-analyzed, specifically for an association with rs9939609 variant of FTO gene. Results Logistic regression analysis (AA – OR = 5.7, 95% CI = 2.41–13.63, p < 0.05) and genetic inheritance analysis (AA – OR = 5.49, 95%CI = 2.34–12.88, p < 0.05) showed that FTO (rs9939609) polymorphism is significantly associated with PCOS and its metabolic manifestations. Serum testosterone was significantly higher in affected women with mutant genotypes (AA+AT) than with the normal allele (TT) (p < 0.05). Although serum kisspeptin was higher in subjects with PCOS and mutant alleles than controls, this difference was not significant (p > 0.05). Conclusion FTO gene variant rs9939609 is associated with hyperandrogenemia and metabolic manifestations of PCOS among women of Sri Lankan descent with the well-characterized phenotype. Serum kisspeptin and the FTO genotypes lack a significant association when adjusted for confounders.
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Affiliation(s)
- Umayal Branavan
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Colombo, PO Box 271, Kynsey Road, Colombo, 08, Sri Lanka.
| | - Sulochana Wijesundera
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Colombo, PO Box 271, Kynsey Road, Colombo, 08, Sri Lanka
| | | | - Carukshi Arambepola
- Department of Community Medicine, Faculty of Medicine, University of Colombo, PO Box 271, Kynsey Road, Colombo, 08, Sri Lanka
| | - Chandrika Wijeyaratne
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Colombo, PO Box 271, Kynsey Road, Colombo, 08, Sri Lanka
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14
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Zhao X, Jiang Y, Xi H, Chen L, Feng X. Exploration of the Relationship Between Gut Microbiota and Polycystic Ovary Syndrome (PCOS): a Review. Geburtshilfe Frauenheilkd 2020; 80:161-171. [PMID: 32109968 PMCID: PMC7035130 DOI: 10.1055/a-1081-2036] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 12/10/2019] [Accepted: 12/11/2019] [Indexed: 02/07/2023] Open
Abstract
Polycystic ovary syndrome (PCOS) is an endocrine and metabolic syndrome (MS) with a complex etiology, and its pathogenesis is not yet clear. In recent years, the correlation between gut microbiota (GM) and metabolic disease has become a hot topic in research, leading to a number of new ideas about the etiology and pathological mechanisms of PCOS. The literature shows that GM can cause insulin resistance, hyperandrogenism, chronic inflammation and metabolic syndrome (obesity, diabetes) and may contribute to the development of PCOS by influencing energy absorption, the pathways of short chain fatty acids (SCFA), lipopolysaccharides, choline and bile acids, intestinal permeability and the brain-gut axis. As part of the treatment of PCOS, fecal microbiota transplantation, supplementation with prebiotics and traditional Chinese medicine can be used to regulate GM and treat disorders. This article reviews possible mechanisms and treatment options for PCOS, based on methods which target the GM, and offers new ideas for the treatment of PCOS.
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Affiliation(s)
- Xiaoxuan Zhao
- Department of Heilongjiang University of Chinese Medicine, Harbin 150040, China
| | - Yuepeng Jiang
- Department of Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Hongyan Xi
- Department of Heilongjiang University of Chinese Medicine, Harbin 150040, China
| | - Lu Chen
- Department of First Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin 150040, China
| | - Xiaoling Feng
- Department of First Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin 150040, China
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15
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Barber TM, Hanson P, Weickert MO, Franks S. Obesity and Polycystic Ovary Syndrome: Implications for Pathogenesis and Novel Management Strategies. CLINICAL MEDICINE INSIGHTS. REPRODUCTIVE HEALTH 2019; 13:1179558119874042. [PMID: 31523137 PMCID: PMC6734597 DOI: 10.1177/1179558119874042] [Citation(s) in RCA: 134] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 08/05/2019] [Indexed: 01/06/2023]
Abstract
Polycystic ovary syndrome (PCOS) is a common female condition typified by reproductive, hyperandrogenic, and metabolic features. Polycystic ovary syndrome is a genetic condition, exacerbated by obesity. There is a close link between obesity and PCOS based on epidemiological data, and more recently corroborated through genetic studies. There are many mechanisms mediating the effects of weight-gain and obesity on the development of PCOS. The metabolic effects of insulin resistance and steroidogenic and reproductive effects of hyperinsulinaemia are important mechanisms. Adipokine production by subcutaneous and visceral fat appears to play a part in metabolic function. However, given the complexity of PCOS pathogenesis, it is important also to consider possible effects of PCOS on further weight-gain, or at least on hampering attempts at weight-loss and maintenance through lifestyle changes. Possible mediators of these effects include changes in energy expenditure, mental ill health, or physical inactivity. In this brief review, we discuss the main mechanisms that underlie the association between obesity and PCOS, from divergent perspectives of weight-gain contributing to development of PCOS and vice versa. We also consider novel management options for women with obesity and PCOS.
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Affiliation(s)
- Thomas M Barber
- Warwickshire Institute for the Study of Diabetes, Endocrinology and Metabolism, University Hospitals Coventry and Warwickshire, Coventry, UK.,Warwick Medical School, University of Warwick, Coventry, UK
| | - Petra Hanson
- Warwickshire Institute for the Study of Diabetes, Endocrinology and Metabolism, University Hospitals Coventry and Warwickshire, Coventry, UK.,Warwick Medical School, University of Warwick, Coventry, UK
| | - Martin O Weickert
- Warwickshire Institute for the Study of Diabetes, Endocrinology and Metabolism, University Hospitals Coventry and Warwickshire, Coventry, UK.,Warwick Medical School, University of Warwick, Coventry, UK.,Centre of Applied Biological and Exercise Sciences, Coventry University, Coventry, UK
| | - Stephen Franks
- Institute of Reproductive Medicine, Imperial College London, London, UK
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16
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Brower MA, Hai Y, Jones MR, Guo X, Chen YDI, Rotter JI, Krauss RM, Legro RS, Azziz R, Goodarzi MO. Bidirectional Mendelian randomization to explore the causal relationships between body mass index and polycystic ovary syndrome. Hum Reprod 2019; 34:127-136. [PMID: 30496407 PMCID: PMC6295958 DOI: 10.1093/humrep/dey343] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 10/17/2018] [Accepted: 11/01/2018] [Indexed: 11/14/2022] Open
Abstract
STUDY QUESTION What are the causal relationships between polycystic ovary syndrome (PCOS) and body mass index (BMI)? SUMMARY ANSWER Bidirectional Mendelian randomization analyses suggest that increased BMI is causal for PCOS while the reverse is not the case. WHAT IS KNOWN ALREADY The contribution of obesity to the pathogenesis of PCOS is controversial. To date, published genetic studies addressing this question have generated conflicting results and have not utilized the full extent of known single nucleotide polymorphisms associated with body mass index (BMI). STUDY DESIGN, SIZE, DURATION This cross-sectional Mendelian randomization (MR) and genetic association study was conducted in 750 individuals of European origin and with PCOS and 1567 BMI-matched controls. PARTICIPANTS/MATERIALS, SETTING, METHODS Cases and controls were matched for BMI as well as for distribution of weight categories (normal weight, overweight, obese). Two-sample MR using inverse variance weighting (IVW) was conducted using a 92-SNP instrument variable for BMI with PCOS as the outcome, followed by two-sample MR with a 16-SNP instrument variable for PCOS with BMI as the outcome. Sensitivity analyses included MR-Egger and maximum likelihood methods. Secondary analyses assessed associations of genetic risk scores and individual SNPs with PCOS, BMI and quantitative androgen-related and glucose homeostasis-related traits. MAIN RESULTS AND THE ROLE OF CHANCE Each standard deviation genetically higher BMI was associated with a 4.89 (95% CI 1.46-16.32) higher odds of PCOS. Conversely, genetic risk of PCOS did not influence BMI. Sensitivity analyses yielded directionally consistent results. The genetic risk score of 92 BMI SNPs was associated with the diagnosis of PCOS (OR 1.043, 95% CI 1.009-1.078, P = 0.012). Of the 92 BMI risk variants evaluated, none were associated individually with PCOS after considering multiple testing. The association of FTO SNP rs1421085 with BMI was stronger in women with PCOS (β = 0.071, P = 0.0006) than in controls (β = 0.046, P = 0.065). LIMITATIONS, REASONS FOR CAUTION The current sample size, while providing good power for MR and genetic risk score analyses, had limited power to demonstrate association of individual SNPs with PCOS. Cases and controls were not matched for age; however, this was mitigated by adjusting analyses for age. Dietary and lifestyle data, which could have been used to explore the greater association of the FTO SNP with BMI in women with PCOS, was not available. WIDER IMPLICATIONS OF THE FINDINGS Increasing BMI appears to be causal for PCOS but having PCOS does not appear to affect BMI. This study used the most comprehensive set of SNPs for BMI currently available. Prior studies using fewer SNPs had yielded conflicting results and may have been confounded because cases and controls were not matched for weight categories. The current results highlight the potential utility of weight management in the prevention and treatment of PCOS. STUDY FUNDING/COMPETING INTEREST(S) National Institutes of Health Grants R01-HD29364 and K24-HD01346 (to R.A.), Grant R01-DK79888 (to M.O.G.), Grant U54-HD034449 (to R.S.L.), Grant U19-HL069757 (to R.M.K.). The funders had no influence on the data collection, analyses or conclusions of the study. No conflict of interests to declare. TRIAL REGISTRATION NUMBER N/A.
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Affiliation(s)
- M A Brower
- Department of Obstetrics and Gynecology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Y Hai
- Department of Statistics, University of Auckland, Auckland, New Zealand
- Institute for Translational Genomics and Population Sciences and Department of Pediatrics, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA, USA
| | - M R Jones
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - X Guo
- Institute for Translational Genomics and Population Sciences and Department of Pediatrics, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA, USA
| | - Y -D I Chen
- Institute for Translational Genomics and Population Sciences and Department of Pediatrics, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA, USA
| | - J I Rotter
- Institute for Translational Genomics and Population Sciences and Department of Pediatrics, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA, USA
| | - R M Krauss
- Children’s Hospital of Oakland Research Institute, Oakland, CA, USA
| | - R S Legro
- Department of Obstetrics and Gynecology, Pennsylvania State College of Medicine, Hershey, PA, USA
| | - R Azziz
- Departments of Obstetrics and Gynecology and Medicine, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - M O Goodarzi
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
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Branavan U, Muneeswaran K, Wijesundera S, Jayakody S, Chandrasekharan V, Wijeyaratne C. Identification of selected genetic polymorphisms in polycystic ovary syndrome in Sri Lankan women using low cost genotyping techniques. PLoS One 2018; 13:e0209830. [PMID: 30596735 PMCID: PMC6312267 DOI: 10.1371/journal.pone.0209830] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 12/12/2018] [Indexed: 12/14/2022] Open
Abstract
Background Polycystic ovary syndrome (PCOS), the commonest endocrine disorder affecting young women, appears to be a multigenic trait with contributing genes being unclear. Hence, analysis of polymorphisms in multiple candidate genes is required. Currently available genotyping methods are expensive, time-consuming with limited analytical sensitivity. Aim (i) Develop and validate high resolution melting (HRM) assay and allele-specific real-time quantitative PCR (AS-qPCR) for genotyping selected SNPs associated with PCOS. (ii) Identify selected SNPs and their association with a Sri Lankan cohort of well-characterized PCOS. Methods DNA was extracted from women with well-characterized PCOS from adolescence (n = 55) and ethnically matched controls (n = 110). FTO (Fat mass and obesity associated gene; rs9939609), FSHB (Follicle stimulating hormone beta subunit; rs6169), FSHR (Follicle stimulating hormone receptor; rs6165/rs6166), and INSR (Insulin receptor; rs1799817) genes were genotyped using HRM assay. GnRH1 (Gonadotropin releasing hormone; rs6185), LHB (Luteinizing hormone beta subunit; rs1800447/rs34349826) and LHCGR (Luteinizing hormone/choriogonadotropin receptor; rs2293275) genes were genotyped using AS-qPCR method. Genotyping results were validated using Sanger sequencing. Results A significant association was observed within FTO gene polymorphism (rs9939609) and PCOS. Genotype frequency of FTO gene (rs9939609)—cases versus controls were TT-36.4% vs.65.4% (p<0.05), AT-23.6% vs.20.9%, AA-40% vs.13.6% (p<0.05). Genotype frequencies of the SNPs GnRH1 (rs6185), FSHB (rs6169), FSHR (rs6165 & rs6166), LHB (rs1800447 & rs34349826), LHCGR (rs2293275) and INSR (rs1799817) were not significantly different between cases and controls (p>0.05). Only the mutant alleles were observed for LHB rs1800447 and rs34349826 SNPs in both groups. The HRM and AS-qPCR assay results had 100% concordance with sequencing results. Conclusions FTO gene rs9939609 polymorphism is significantly more prevalent among Sri Lankan PCOS subjects while the other selected SNPs of HPG axis genes and INSR gene showed no association. HRM and AS-qPCR assays provide a reliable, fast and user-friendly genotyping method facilitating wider implication in clinical practice.
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Affiliation(s)
- Umayal Branavan
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka
| | - Kajan Muneeswaran
- Department of Chemistry, Faculty of Science, University of Colombo, Colombo, Sri Lanka
- Department of Psychiatry, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka
| | - Sulochana Wijesundera
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka
| | - Surangi Jayakody
- Department of Community Medicine, Faculty of Medical Sciences, University of Sri Jayawardanapura, Nugegoda, Sri Lanka
| | | | - Chandrika Wijeyaratne
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka
- * E-mail: ,
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18
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Chen Y, Fang SY. Potential genetic polymorphisms predicting polycystic ovary syndrome. Endocr Connect 2018; 7:R187-R195. [PMID: 29622662 PMCID: PMC5937197 DOI: 10.1530/ec-18-0121] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 04/05/2018] [Indexed: 01/28/2023]
Abstract
Polycystic ovary syndrome (PCOS) is a heterogenous endocrine disorder with typical symptoms of oligomenorrhoea, hyperandrogenism, hirsutism, obesity, insulin resistance and increased risk of type 2 diabetes mellitus. Extensive evidence indicates that PCOS is a genetic disease and numerous biochemical pathways have been linked with its pathogenesis. A number of genes from these pathways have been investigated, which include those involved with steroid hormone biosynthesis and metabolism, action of gonadotropin and gonadal hormones, folliculogenesis, obesity and energy regulation, insulin secretion and action and many others. In this review, we summarize the historical and recent findings in genetic polymorphisms of PCOS from the relevant publications and outline some genetic polymorphisms that are potentially associated with the risk of PCOS. This information could uncover candidate genes associating with PCOS, which will be valuable for the development of novel diagnostic and treatment platforms for PCOS patients.
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Affiliation(s)
- Yao Chen
- Hangzhou Fuyang Women and Children HospitalHangzhou, China
| | - Shu-Ying Fang
- Hangzhou Fuyang Women and Children HospitalHangzhou, China
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19
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Lu C, Liu X, Wang L, Jiang N, Yu J, Zhao X, Hu H, Zheng S, Li X, Wang G. Integrated analyses for genetic markers of polycystic ovary syndrome with 9 case-control studies of gene expression profiles. Oncotarget 2018; 8:3170-3180. [PMID: 27965459 PMCID: PMC5356873 DOI: 10.18632/oncotarget.13881] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 12/01/2016] [Indexed: 12/25/2022] Open
Abstract
Due to genetic heterogeneity and variable diagnostic criteria, genetic studies of polycystic ovary syndrome are particularly challenging. Furthermore, lack of sufficiently large cohorts limits the identification of susceptibility genes contributing to polycystic ovary syndrome. Here, we carried out a systematic search of studies deposited in the Gene Expression Omnibus database through August 31, 2016. The present analyses included studies with: 1) patients with polycystic ovary syndrome and normal controls, 2) gene expression profiling of messenger RNA, and 3) sufficient data for our analysis. Ultimately, a total of 9 studies with 13 datasets met the inclusion criteria and were performed for the subsequent integrated analyses. Through comprehensive analyses, there were 13 genetic factors overlapped in all datasets and identified as significant specific genes for polycystic ovary syndrome. After quality control assessment, there were six datasets remained. Further gene ontology enrichment and pathway analyses suggested that differentially expressed genes mainly enriched in oocyte pathways. These findings provide potential molecular markers for diagnosis and prognosis of polycystic ovary syndrome, and need in-depth studies on the exact function and mechanism in polycystic ovary syndrome.
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Affiliation(s)
- Chenqi Lu
- Department of Biostatistics and Computational Biology, State Key Laboratory of Genetic Engineering, Department of Gynecology, Obstetrics and Gynecology Hospital, School of Life Sciences, Fudan University, Shanghai, China
| | - Xiaoqin Liu
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Health Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Science and Technology, Tongji University, Shanghai, China
| | - Lin Wang
- Department of Endocrinology, East Hospital, Tongji University School of Medicine, Tongji University, Shanghai, China
| | - Ning Jiang
- Department of Biostatistics and Computational Biology, State Key Laboratory of Genetic Engineering, Department of Gynecology, Obstetrics and Gynecology Hospital, School of Life Sciences, Fudan University, Shanghai, China
| | - Jun Yu
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Health Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Science and Technology, Tongji University, Shanghai, China
| | - Xiaobo Zhao
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Health Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Science and Technology, Tongji University, Shanghai, China
| | - Hairong Hu
- Department of Biostatistics and Computational Biology, State Key Laboratory of Genetic Engineering, Department of Gynecology, Obstetrics and Gynecology Hospital, School of Life Sciences, Fudan University, Shanghai, China
| | - Saihua Zheng
- Department of Biostatistics and Computational Biology, State Key Laboratory of Genetic Engineering, Department of Gynecology, Obstetrics and Gynecology Hospital, School of Life Sciences, Fudan University, Shanghai, China
| | - Xuelian Li
- Department of Biostatistics and Computational Biology, State Key Laboratory of Genetic Engineering, Department of Gynecology, Obstetrics and Gynecology Hospital, School of Life Sciences, Fudan University, Shanghai, China
| | - Guiying Wang
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Health Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Science and Technology, Tongji University, Shanghai, China
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Liu T, Zhao H, Wang J, Shu X, Gao Y, Mu X, Gao F, Liu H. The role of fructose‑1,6‑bisphosphatase 1 in abnormal development of ovarian follicles caused by high testosterone concentration. Mol Med Rep 2017; 16:6489-6498. [PMID: 28901488 PMCID: PMC5865816 DOI: 10.3892/mmr.2017.7463] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 01/24/2017] [Indexed: 01/20/2023] Open
Abstract
The present study aimed to identify the molecular mechanisms underlying the effects of the fructose-1,6-bisphosphatase 1 (FBP1) signaling pathway within normal follicle development and in hyperandrogenism-induced abnormal follicle growth. To achieve this, murine primary follicles, granulosa cells (GCs) and theca-interstitial cells (TICs) were isolated, cultured in vitro and treated with a high concentration of androgens. A concentration of 1×10−5 mol/l testosterone was considerable to induce hyperandrogenism by MTT assay. All cells were divided into four groups, as follows: Control group, testosterone group, androgen receptor antagonist-flutamide group and flutamide + testosterone group. Flutamide was used in the present study as it blocks the effects of the androgen receptor. The mRNA expression levels of FBP1 were detected using reverse transcription-quantitative polymerase chain reaction. The expression levels and localization of FBP1 were analyzed by western blot analysis and immunofluorescence staining. The experimental results demonstrated that androgen presence stimulated follicle development, whereas excessive testosterone inhibited development. FBP1 was identified as being mainly expressed in follicles; FBP1 protein was significantly expressed in GCs of the 14-day-cultured follicle, as well as in the cytoplasm and nuclei of GCs and TICs in vitro. Testosterone increased FBP1 expression during a specific range of testosterone concentrations. Testosterone increased the expression of FBP1 within GCs. Furthermore, FBP1 and phosphoenolpyruvate carboxykinase 1 (PCK1) mRNA expression was increased in GCs treated with testosterone, whereas forkhead box protein O1 (FOXO1) and peroxisome proliferator-activated receptor γ coactivator-1α mRNA expression was significantly decreased in the testosterone group. In TICs, testosterone and flutamide inhibited the mRNA expression levels of FOXO1 and glucose-6-phosphatase enzyme, and promoted the expression of PCK1. These results suggested that the FBP1 signaling pathway may serve an important role in normal follicle growth and hyperandrogenism-induced abnormal development, which may be associated with abnormal glucose metabolism induced by high concentrations of testosterone.
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Affiliation(s)
- Tao Liu
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Shandong 250001, P.R. China
| | - Han Zhao
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Shandong 250001, P.R. China
| | - Jianfeng Wang
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Shandong 250001, P.R. China
| | - Xin Shu
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Shandong 250001, P.R. China
| | - Yuan Gao
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Shandong 250001, P.R. China
| | - Xiaoli Mu
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Shandong 250001, P.R. China
| | - Fei Gao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, P.R. China
| | - Hongbin Liu
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Shandong 250001, P.R. China
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Liu AL, Xie HJ, Xie HY, Liu J, Yin J, Hu JS, Peng CY. Association between fat mass and obesity associated (FTO) gene rs9939609 A/T polymorphism and polycystic ovary syndrome: a systematic review and meta-analysis. BMC MEDICAL GENETICS 2017; 18:89. [PMID: 28826396 PMCID: PMC5563909 DOI: 10.1186/s12881-017-0452-1] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 08/14/2017] [Indexed: 12/16/2022]
Abstract
Background Up to now, numerous case-control studies have reported the associations between fat mass and obesity associated (FTO) gene rs9939609 A/T polymorphism and polycystic ovary syndrome (PCOS), however, without a consistent result. Hence we performed current systematic review and meta-analysis to clarify the controversial results. Methods Case-control studies reporting the relationship of rs9939609 A/T polymorphism and PCOS published before April 2015 were searched in Pubmed database without language restriction. Data was analyzed by Review Manager 5.2. Results A total of five studies involving 5010 PCOS patients and 5300 controls were included for further meta-analysis. The results of meta-analysis showed that the FTO gene rs9939609 A/T polymorphism was significantly different between PCOS group and control group in different gene models (For AA + AT vs. TT: OR = 1.41, 95% CI = 1.28–1.55, P < 0.00001. For AA vs. AT + TT: OR = 1.54, 95% CI = 1.25–1.89, P < 0.0001. For AA vs. TT: OR = 1.74, 95% CI = 1.38–2.18, P < 0.00001. For A vs. T: OR = 1.36, 95% CI = 1.25–1.47, P < 0.00001, respectively) suggesting that A allele was a risk factor for PCOS susceptibility. Furthermore, subgroup analysis in Asian and Caucasian ethnicities also found significant association between rs9939609 A/T polymorphism and PCOS (In Asian subgroup: OR = 1.43, 95% CI = 1.29–1.59, P < 0.0001. In Caucasian subgroup: OR = 1.33, 95% CI = 1.08–1.64, P = 0.008) Conclusion This meta-analysis suggests that rs9939609 A/T polymorphism of FTO gene is associated with PCOS risk, and that A allele is a risk factor for PCOS susceptibility simultaneously.
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Affiliation(s)
- Ai Ling Liu
- Institute of Biological Science, School of Pharmaceutical and Biological Science, University of South China, Hengyang, Hunan Province, 421001, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang, 421001, China.,The Key Laboratory of Biological Toxicology and Ecological Restoration of Hengyang City, Hengyang, Hunan Province, 421001, China
| | - Hui Jun Xie
- Institute of Biological Science, School of Pharmaceutical and Biological Science, University of South China, Hengyang, Hunan Province, 421001, China
| | - Hong Yan Xie
- Institute of Biological Science, School of Pharmaceutical and Biological Science, University of South China, Hengyang, Hunan Province, 421001, China
| | - Jun Liu
- Institute of Biological Science, School of Pharmaceutical and Biological Science, University of South China, Hengyang, Hunan Province, 421001, China
| | - Jie Yin
- Institute of Biological Science, School of Pharmaceutical and Biological Science, University of South China, Hengyang, Hunan Province, 421001, China
| | - Jin Song Hu
- Institute of Biological Science, School of Pharmaceutical and Biological Science, University of South China, Hengyang, Hunan Province, 421001, China
| | - Cui Ying Peng
- Institute of Biological Science, School of Pharmaceutical and Biological Science, University of South China, Hengyang, Hunan Province, 421001, China. .,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang, 421001, China. .,The Key Laboratory of Biological Toxicology and Ecological Restoration of Hengyang City, Hengyang, Hunan Province, 421001, China.
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Jafari Nedooshan J, Kargar S, Neamatzadeh H, Haghighi F, Dehghani Mohammad Abadi R, Seddighi N. Lack of Association of the Fat Mass and Obesity Associated (FTO) Gene rs9939609 Polymorphism with Breast Cancer Risk: a Systematic Review and Meta-Analysis Based on Case - Control Studies. Asian Pac J Cancer Prev 2017; 18:1031-1037. [PMID: 28547937 PMCID: PMC5494212 DOI: 10.22034/apjcp.2017.18.4.1031] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Background: Previously published data on any association of the fat mass and obesity-associated (FTO) gene with
breast cancer risk remain inconclusive. Therefore, we conducted the present meta-analysis of links between breast cancer
and the FTO rs9939609 polymorphism. Methods: We have conducted a systematic review of the English literature by
searching PubMed, Google Scholar and ISI Web of Knowledge databases for studies on associations between the FTO
rs9939609 polymorphism and breast cancer risk. Crude odds ratios (ORs) with 95% confidence intervals (CIs) were
calculated to estimate the strength of the association using fixed- or random-effects model. Results: We included five
studies with 1134 cases and 1453 controls. Overall, no significant association between the FTO rs9939609 polymorphism
and risk of breast cancer was found. On subgroup analysis by ethnicity, there was still no significant association detected.
Conclusions: To our knowledge, this is the first meta-analysis of the FTO rs9939609 polymorphism and risk of breast
cancer. However, the present meta-analysis suggested that only there might be a significant association of the CXCL12
rs1801157 polymorphisms with breast cancer risk.
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Affiliation(s)
- Jamal Jafari Nedooshan
- Department of General Surgery, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
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LIU Y, CHEN Y. Fat Mass and Obesity Associated Gene Polymorphism and the Risk of Polycystic Ovary Syndrome: A Meta-analysis. IRANIAN JOURNAL OF PUBLIC HEALTH 2017; 46:4-11. [PMID: 28451524 PMCID: PMC5401934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
BACKGROUND We aimed to elucidate the association between fat mass and obesity associated gene (FTO) polymorphism and the risk of polycystic ovary syndrome (PCOS) by meta-analysis. METHODS We searched PubMed and Embase databases to find the relevant studies. Odds ratios (ORs) and their corresponding 95% confidence intervals (CIs) were used for pooled analysis. Statistical analyses were carried out by using R 3.12 software. Heterogeneity was assessed using I 2 and Q statistics. I 2 >50% or P<0.05 was considered as heterogeneity statistically, and random effects model was used for pooled analysis. Otherwise, fixed-effect model was used. RESULTS Twelve eligible studies that published from 2008 to 2015 were included in this meta-analysis. The pooled analyses showed that rs9939609 polymorphism of FTO gene was significantly associated with risk of PCOS under A vs. T, AT vs. TT, AA vs. TT, AA vs. AT+TT and AA+AT vs. TT genetic models. However, for rs8050136 and rs1421085, significant association was only found under recessive genetic model. CONCLUSION rs9939609 variation of FTO gene is significantly associated with risk of PCOS. However, the association between rs8050136, rs1421085, and PCOS is still unclear and needs further confirmation.
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Zhao H, Lv Y, Li L, Chen ZJ. Genetic Studies on Polycystic Ovary Syndrome. Best Pract Res Clin Obstet Gynaecol 2016; 37:56-65. [DOI: 10.1016/j.bpobgyn.2016.04.002] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Revised: 03/21/2016] [Accepted: 04/19/2016] [Indexed: 01/19/2023]
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Tian Y, Zhang W, Zhao S, Sun Y, Bian Y, Chen T, Du Y, Zhang J, Wang Z, Huang T, Peng Y, Yang P, Zhao H, Chen ZJ. FADS1-FADS2 gene cluster confers risk to polycystic ovary syndrome. Sci Rep 2016; 6:21195. [PMID: 26879377 PMCID: PMC4754766 DOI: 10.1038/srep21195] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 01/19/2016] [Indexed: 01/22/2023] Open
Abstract
Dyslipidemia is common in polycystic ovary syndrome (PCOS). This study was aimed to investigate whether fatty acid desaturase genes (FADS), a dyslipidemia-related gene cluster, are associated with PCOS. We scanned variations of FADS genes using our previous data of genome-wide association study (GWAS) for PCOS and selected rs174570 for further study. The case-control study was conducted in an independent cohort of 1918 PCOS cases and 1889 age-matched controls and family-based study was conducted in a set of 243 core family trios with PCOS probands. Minor allele frequency (allele T) of rs174570 was significantly lower in PCOS cases than that in age-matched controls (P = 2.17E-03, OR = 0.85), even after adjustment of BMI and age. PCOS subjects carrying CC genotype had higher testosterone level and similar lipid/glucose level compared with those carrying TT or TC genotype. In trios, transmission disequilibrium test (TDT) analysis revealed risk allele C of rs174570 was significantly over-transmitted (P = 2.00E-04). Decreased expression of FADS2 was detected in PCOS cases and expression quantitative trait loci (eQTL) analysis revealed the risk allele C dosage was correlated with the decline of FADS2 expression (P = 0.002). Our results demonstrate that FADS1-FADS2 are susceptibility genes for PCOS.
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Affiliation(s)
- Ye Tian
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China.,Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China; National Research Center for Assisted Reproductive Technology and Reproductive Genetics, China; The Key laboratory for Reproductive Endocrinology of Ministry of Education, China; Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan, China
| | - Wei Zhang
- Department of joint and bone oncology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Shigang Zhao
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Yinhua Sun
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China; National Research Center for Assisted Reproductive Technology and Reproductive Genetics, China; The Key laboratory for Reproductive Endocrinology of Ministry of Education, China; Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan, China
| | - Yuehong Bian
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China; National Research Center for Assisted Reproductive Technology and Reproductive Genetics, China; The Key laboratory for Reproductive Endocrinology of Ministry of Education, China; Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan, China
| | - Tailai Chen
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China; National Research Center for Assisted Reproductive Technology and Reproductive Genetics, China; The Key laboratory for Reproductive Endocrinology of Ministry of Education, China; Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan, China
| | - Yanzhi Du
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Jiangtao Zhang
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China; National Research Center for Assisted Reproductive Technology and Reproductive Genetics, China; The Key laboratory for Reproductive Endocrinology of Ministry of Education, China; Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan, China
| | - Zhao Wang
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China; National Research Center for Assisted Reproductive Technology and Reproductive Genetics, China; The Key laboratory for Reproductive Endocrinology of Ministry of Education, China; Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan, China
| | - Tao Huang
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China; National Research Center for Assisted Reproductive Technology and Reproductive Genetics, China; The Key laboratory for Reproductive Endocrinology of Ministry of Education, China; Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan, China
| | - Yingqian Peng
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China; National Research Center for Assisted Reproductive Technology and Reproductive Genetics, China; The Key laboratory for Reproductive Endocrinology of Ministry of Education, China; Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan, China
| | - Ping Yang
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China; National Research Center for Assisted Reproductive Technology and Reproductive Genetics, China; The Key laboratory for Reproductive Endocrinology of Ministry of Education, China; Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan, China
| | - Han Zhao
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China; National Research Center for Assisted Reproductive Technology and Reproductive Genetics, China; The Key laboratory for Reproductive Endocrinology of Ministry of Education, China; Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan, China
| | - Zi-Jiang Chen
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China.,Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China; National Research Center for Assisted Reproductive Technology and Reproductive Genetics, China; The Key laboratory for Reproductive Endocrinology of Ministry of Education, China; Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan, China
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Association of single-nucleotide polymorphisms rs2197076 and rs2241883 of FABP1 gene with polycystic ovary syndrome. J Assist Reprod Genet 2015; 33:75-83. [PMID: 26650609 DOI: 10.1007/s10815-015-0626-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 11/22/2015] [Indexed: 01/31/2023] Open
Abstract
PURPOSE The objective of this study was to evaluate the association between single-nucleotide polymorphisms (SNPs) rs2197076 and rs2241883 in fatty acid-binding protein 1 (FABP1) gene and polycystic ovary syndrome (PCOS). METHODS The two alleles rs2197076 and rs2241883 in FABP1 gene in 221 PCOS women and 198 normal women were amplified and sequenced. Allele frequency comparison was performed between the PCOS and control groups, and genotype-phenotype correlation analysis was performed using dominant and recessive models to assess the association of FABP1 and the main features of PCOS. RESULTS Allele frequency analyses showed a strong association of SNPs rs2197076 and rs2241883 of FABP1 gene with PCOS (P < 0.001). The additive, dominant, and recessive genotype model analyses further supported this association even after adjusting for age and body mass index (BMI). The minor allele frequency (MAF) of rs2241883 in obese PCOS women was less than that in obese control women. Further genotype-phenotype correlation analysis showed that SNP rs2197076 had a stronger association with the main features of PCOS than SNP rs2241883. CONCLUSION In the association of SNPs in FABP1 gene with PCOS, rs2197076 was more closely associated with its main features than rs2241883 and seemed to play a more important role in the pathogenesis of PCOS.
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Xue H, Zhao H, Zhao Y, Liu X, Chen Z, Ma J. Association of common variants of FTO in women with polycystic ovary syndrome. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2015; 8:13505-13509. [PMID: 26722565 PMCID: PMC4680510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Accepted: 09/28/2015] [Indexed: 06/05/2023]
Abstract
BACKGROUND Polycystic ovary syndrome (PCOS) is a common and complex multisystemic genetic disease. Previous genome-wide association study (GWAS) of PCOS has found several potentially causative single nucleotide polymorphisms (SNPs) in Han Chinese population. The goal of present investigation was to assess the potential association between rs1121980, rs1421085, rs1558902, rs8050136 SNPs and PCOS. In order to make a better elucidation of this disease, further investigations of association between SNPs susceptibility and PCOS become necessary. METHODS In the present study, we enrolled 212 patients with PCOS and 198 control subjects. Four polymorphisms of FTO gene (rs1121980, rs1421085, rs1558902, rs8050136) were genotyped by Taqman-MGB method, and their relationship with PCOS was speculated. RESULTS The allele frequency has no significant difference between the PCOS group and the controls. Genotype frequencies of the four SNPs in the additive, dominant and recessive models showed no significant difference between PCOS cases and controls. CONCLUSIONS Our results demonstrate that FTO gene has little association in PCOS development.
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Affiliation(s)
- Hongxi Xue
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Shandong Provincial Key Laboratory of Reproductive MedicineJinan, China
- Department of Reproductive Medicine, Rizhao City Hospital of Traditional Chinese MedicineRizhao, China
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticsJinan, China
- The Key Laboratory for Reproductive Endocrinology of Ministry of EducationJinan, China
| | - Han Zhao
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Shandong Provincial Key Laboratory of Reproductive MedicineJinan, China
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticsJinan, China
- The Key Laboratory for Reproductive Endocrinology of Ministry of EducationJinan, China
| | - Yueran Zhao
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Shandong Provincial Key Laboratory of Reproductive MedicineJinan, China
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticsJinan, China
- The Key Laboratory for Reproductive Endocrinology of Ministry of EducationJinan, China
| | - Xin Liu
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Shandong Provincial Key Laboratory of Reproductive MedicineJinan, China
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticsJinan, China
- The Key Laboratory for Reproductive Endocrinology of Ministry of EducationJinan, China
| | - Zijiang Chen
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Shandong Provincial Key Laboratory of Reproductive MedicineJinan, China
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticsJinan, China
- The Key Laboratory for Reproductive Endocrinology of Ministry of EducationJinan, China
| | - Jinlong Ma
- Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Shandong Provincial Key Laboratory of Reproductive MedicineJinan, China
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticsJinan, China
- The Key Laboratory for Reproductive Endocrinology of Ministry of EducationJinan, China
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Dumesic DA, Oberfield SE, Stener-Victorin E, Marshall JC, Laven JS, Legro RS. Scientific Statement on the Diagnostic Criteria, Epidemiology, Pathophysiology, and Molecular Genetics of Polycystic Ovary Syndrome. Endocr Rev 2015; 36:487-525. [PMID: 26426951 PMCID: PMC4591526 DOI: 10.1210/er.2015-1018] [Citation(s) in RCA: 546] [Impact Index Per Article: 60.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Polycystic ovary syndrome (PCOS) is a heterogeneous and complex disorder that has both adverse reproductive and metabolic implications for affected women. However, there is generally poor understanding of its etiology. Varying expert-based diagnostic criteria utilize some combination of oligo-ovulation, hyperandrogenism, and the presence of polycystic ovaries. Criteria that require hyperandrogenism tend to identify a more severe reproductive and metabolic phenotype. The phenotype can vary by race and ethnicity, is difficult to define in the perimenarchal and perimenopausal period, and is exacerbated by obesity. The pathophysiology involves abnormal gonadotropin secretion from a reduced hypothalamic feedback response to circulating sex steroids, altered ovarian morphology and functional changes, and disordered insulin action in a variety of target tissues. PCOS clusters in families and both female and male relatives can show stigmata of the syndrome, including metabolic abnormalities. Genome-wide association studies have identified a number of candidate regions, although their role in contributing to PCOS is still largely unknown.
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Affiliation(s)
- Daniel A Dumesic
- Department of Obstetrics and Gynecology (D.A.D.), David Geffen School of Medicine at UCLA, Los Angeles, California 90095; Division of Pediatric Endocrinology (S.E.O.), Children's Hospital of New York-Presbyterian, Columbia University College of Physicians and Surgeons, New York, New York 10032; Department of Physiology (E.S.-V.), Karolinska Institutet, 171 77 Stockholm, Sweden; Center for Research in Reproduction and Division of Endocrinology (J.C.M.), Department of Internal Medicine, University of Virginia Health System, Charlottesville, Virginia 22903; Division of Reproductive Medicine (J.S.L.), Department of Obstetrics and Gynecology, Erasmus Medical Center, 3000 CA Rotterdam, The Netherlands; and Department of Obstetrics and Gynecology (R.S.L.), Pennsylvania State University College of Medicine, Hershey, Pennsylvania 17033
| | - Sharon E Oberfield
- Department of Obstetrics and Gynecology (D.A.D.), David Geffen School of Medicine at UCLA, Los Angeles, California 90095; Division of Pediatric Endocrinology (S.E.O.), Children's Hospital of New York-Presbyterian, Columbia University College of Physicians and Surgeons, New York, New York 10032; Department of Physiology (E.S.-V.), Karolinska Institutet, 171 77 Stockholm, Sweden; Center for Research in Reproduction and Division of Endocrinology (J.C.M.), Department of Internal Medicine, University of Virginia Health System, Charlottesville, Virginia 22903; Division of Reproductive Medicine (J.S.L.), Department of Obstetrics and Gynecology, Erasmus Medical Center, 3000 CA Rotterdam, The Netherlands; and Department of Obstetrics and Gynecology (R.S.L.), Pennsylvania State University College of Medicine, Hershey, Pennsylvania 17033
| | - Elisabet Stener-Victorin
- Department of Obstetrics and Gynecology (D.A.D.), David Geffen School of Medicine at UCLA, Los Angeles, California 90095; Division of Pediatric Endocrinology (S.E.O.), Children's Hospital of New York-Presbyterian, Columbia University College of Physicians and Surgeons, New York, New York 10032; Department of Physiology (E.S.-V.), Karolinska Institutet, 171 77 Stockholm, Sweden; Center for Research in Reproduction and Division of Endocrinology (J.C.M.), Department of Internal Medicine, University of Virginia Health System, Charlottesville, Virginia 22903; Division of Reproductive Medicine (J.S.L.), Department of Obstetrics and Gynecology, Erasmus Medical Center, 3000 CA Rotterdam, The Netherlands; and Department of Obstetrics and Gynecology (R.S.L.), Pennsylvania State University College of Medicine, Hershey, Pennsylvania 17033
| | - John C Marshall
- Department of Obstetrics and Gynecology (D.A.D.), David Geffen School of Medicine at UCLA, Los Angeles, California 90095; Division of Pediatric Endocrinology (S.E.O.), Children's Hospital of New York-Presbyterian, Columbia University College of Physicians and Surgeons, New York, New York 10032; Department of Physiology (E.S.-V.), Karolinska Institutet, 171 77 Stockholm, Sweden; Center for Research in Reproduction and Division of Endocrinology (J.C.M.), Department of Internal Medicine, University of Virginia Health System, Charlottesville, Virginia 22903; Division of Reproductive Medicine (J.S.L.), Department of Obstetrics and Gynecology, Erasmus Medical Center, 3000 CA Rotterdam, The Netherlands; and Department of Obstetrics and Gynecology (R.S.L.), Pennsylvania State University College of Medicine, Hershey, Pennsylvania 17033
| | - Joop S Laven
- Department of Obstetrics and Gynecology (D.A.D.), David Geffen School of Medicine at UCLA, Los Angeles, California 90095; Division of Pediatric Endocrinology (S.E.O.), Children's Hospital of New York-Presbyterian, Columbia University College of Physicians and Surgeons, New York, New York 10032; Department of Physiology (E.S.-V.), Karolinska Institutet, 171 77 Stockholm, Sweden; Center for Research in Reproduction and Division of Endocrinology (J.C.M.), Department of Internal Medicine, University of Virginia Health System, Charlottesville, Virginia 22903; Division of Reproductive Medicine (J.S.L.), Department of Obstetrics and Gynecology, Erasmus Medical Center, 3000 CA Rotterdam, The Netherlands; and Department of Obstetrics and Gynecology (R.S.L.), Pennsylvania State University College of Medicine, Hershey, Pennsylvania 17033
| | - Richard S Legro
- Department of Obstetrics and Gynecology (D.A.D.), David Geffen School of Medicine at UCLA, Los Angeles, California 90095; Division of Pediatric Endocrinology (S.E.O.), Children's Hospital of New York-Presbyterian, Columbia University College of Physicians and Surgeons, New York, New York 10032; Department of Physiology (E.S.-V.), Karolinska Institutet, 171 77 Stockholm, Sweden; Center for Research in Reproduction and Division of Endocrinology (J.C.M.), Department of Internal Medicine, University of Virginia Health System, Charlottesville, Virginia 22903; Division of Reproductive Medicine (J.S.L.), Department of Obstetrics and Gynecology, Erasmus Medical Center, 3000 CA Rotterdam, The Netherlands; and Department of Obstetrics and Gynecology (R.S.L.), Pennsylvania State University College of Medicine, Hershey, Pennsylvania 17033
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Micali N, Field AE, Treasure JL, Evans DM. Are obesity risk genes associated with binge eating in adolescence? Obesity (Silver Spring) 2015; 23:1729-36. [PMID: 26193063 PMCID: PMC4660437 DOI: 10.1002/oby.21147] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 04/02/2015] [Accepted: 04/08/2015] [Indexed: 12/20/2022]
Abstract
OBJECTIVE Cognitions and behaviors characteristic of binge eating are associated with a polymorphism in the FTO gene, robustly related to body mass index (BMI) and obesity risk. We investigated the association between binge eating and the individual and combined effect of 32 SNPs robustly associated with BMI in a population-based sample. We hypothesized that higher BMI and binge eating might share a common genetic etiology. METHODS Binge eating was assessed in adolescents from the Avon Longitudinal Study of Parents and Children at age 14 (n = 5,958) and 16 years (n = 4,948). We tested associations between 32 BMI-related SNPs and binge eating in crude and BMI-, age-, and gender-adjusted regression models. RESULTS Crude analyses showed an association between binge eating and rs1558902 (FTO) that persisted after adjustment for BMI (OR = 1.20, P = 8 × 10(-3) ). A weighted allelic score consisting of all 32 BMI-related SNPs was associated with binge eating (P = 8 × 10(-4) ); this association attenuated (P = 0.08) when rs1558902 was removed from the weighted allelic score. CONCLUSIONS BMI-related genes are associated with adolescent binge eating, in particular an FTO polymorphism. Although replication is needed, our findings have biological plausibility and are consistent with a postulated effect of FTO on appetite and food intake. Future studies should aim to understand the mechanisms underlying the relationship between FTO, binge eating, and obesity.
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Affiliation(s)
- Nadia Micali
- Population, Policy and Practice Research Programme, Child and Adolescent Mental Health Palliative Care and Pediatrics Section, Institute of Child Health, University College LondonLondon, UK
| | - Alison E Field
- Division of Adolescent Medicine, Department of Medicine, Boston Children's Hospital and Harvard Medical SchoolBoston, Massachusetts, USA
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical SchoolBoston, Massachusetts, USA
- Department of Epidemiology, Harvard T.H. Chan School of Public HealthBoston, Massachusetts, USA
| | - Janet L Treasure
- Section of Eating Disorders, Psychological Medicine, King's College London, Institute of PsychiatryLondon, UK
| | - David M Evans
- MRC Integrative Epidemiology Unit, University of BristolUK
- School of Social & Community Medicine, University of BristolBristol, UK
- University of Queensland Diamantina Institute, Translational Research InstituteBrisbane, Queensland, Australia
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Yuan H, Zhu G, Wang F, Wang X, Guo H, Shen M. Interaction between common variants of FTO and MC4R is associated with risk of PCOS. Reprod Biol Endocrinol 2015; 13:55. [PMID: 26032905 PMCID: PMC4455322 DOI: 10.1186/s12958-015-0050-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Accepted: 05/23/2015] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Polycystic ovary syndrome (PCOS) is a common and complex endocrine-metabolic disease. One of the well-documented characteristics of PCOS is obesity or overweightness. It is possible to be genetically predisposed to becoming obese or overweight, and several potentially causative single nucleotide polymorphisms (SNPs), such as rs9939609 (A/T) in the fat mass, and obesity-associated gene (FTO) and rs17782313 (T/C) in the melanocortin-4 receptor gene (MC4R), have been investigated. Further investigation of association between obesity-associated SNPs and PCOS susceptibility will contribute to a better understanding of the disease. METHODS In the present study, we enrolled 733 patients with PCOS and 892 control subjects. The common variants FTO rs9939609 and MC4R rs17782313 were genotyped and their relationship with obesity-related traits was evaluated. RESULTS Rs9939609 and rs17782313 are associated with PCOS and obesity-related traits and profiles. The association found between PCOS and FTO rs9939609 (p=0.0302) was attenuated after adjustment for BMI (p=0.187). MC4R rs17782313 did not confer an increased risk for PCOS (p=0.368) even after adjustments (p=0.715). Interestingly, the interaction of FTO and MC4R polymorphisms was more significantly associated with PCOS (p=0.031, adjusted for age and BMI). The FTO variant rs9939609 is associated with Chinese women with PCOS; however, this association is affected by BMI. CONCLUSIONS The combined pathogenic effect of FTO and MC4R polymorphisms indicates a direct role of the interaction between FTO and MC4R polymorphisms in the development of PCOS.
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Affiliation(s)
- Huiqin Yuan
- Department of Gynaecology and Obstetrics, First Affiliated Hospital, Huzhou Teachers College, the First People's Hospital of Huzhou, Huzhou, 313000, China.
| | - Guoping Zhu
- Department of Gynaecology and Obstetrics, First Affiliated Hospital, Huzhou Teachers College, the First People's Hospital of Huzhou, Huzhou, 313000, China.
| | - Fang Wang
- Department of Gynaecology and Obstetrics, First Affiliated Hospital, Huzhou Teachers College, the First People's Hospital of Huzhou, Huzhou, 313000, China.
| | - Xiang Wang
- Department of Laboratory Medicine, First Affiliated Hospital, Huzhou Teachers College, the First People's Hospital of Huzhou, Huzhou, 313000, China.
| | - Huihui Guo
- Department of Laboratory Medicine, First Affiliated Hospital, Huzhou Teachers College, the First People's Hospital of Huzhou, Huzhou, 313000, China.
| | - Mo Shen
- Department of Laboratory Medicine, First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China.
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31
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Abstract
The etiology of polycystic ovary syndrome (PCOS) has been difficult to determine because its features are heterogeneous, and its origin may also be heterogeneous. Twin studies suggest that its etiology is strongly heritable and genetic approaches are rapidly uncovering new regions of the genome that appear to confer risk for PCOS. Recent genome-wide association studies in Han Chinese women with PCOS demonstrate 11 genetic loci that are associated with PCOS. The variants identified are in regions that contain genes important for gonadotropin action, genes that are associated with risk for type 2 diabetes, and other genes in which the relationship to PCOS is not yet clear. Replication studies have demonstrated that variants at several of these loci also confer risk for PCOS in women of European ethnicity. The strongest loci in Europeans contain genes for DENND1A and THADA, with additional associations in loci containing the LHCGR and FSHR, YAP1 and RAB5/SUOX. The next steps in uncovering the pathophysiology borne out by these loci and variants will include mapping to determine the causal variant and gene, phenotype studies to determine whether these regions are associated with particular features of PCOS and functional studies of the causal variant to determine the direct cause of PCOS based on the underlying genetics. The next years will be very exciting times as groups from around the world come together to further elucidate the genetic origins of PCOS.
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Affiliation(s)
- Corrine K Welt
- Reproductive Endocrine Unit, Massachusetts General Hospital, Boston, Massachusetts
| | - Jessica M Duran
- Reproductive Endocrine Unit, Massachusetts General Hospital, Boston, Massachusetts
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Association between fat mass- and obesity-associated (FTO) gene polymorphism and polycystic ovary syndrome: a meta-analysis. PLoS One 2014; 9:e86972. [PMID: 24466303 PMCID: PMC3899374 DOI: 10.1371/journal.pone.0086972] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2013] [Accepted: 12/19/2013] [Indexed: 12/16/2022] Open
Abstract
Aims Many studies have investigated the relationship between FTO gene polymorphism and polycystic ovary syndrome (PCOS) susceptibility but revealed mixed results. In this study, we aimed to perform a meta-analysis to clarify this association. Methods Published literature from PubMed, Embase and CNKI was retrieved. Meta-analysis was performed to calculate pooled odds ratio (OR) with 95% confidence interval (CI) using the random- or fix- effects model. Results A total of 5 studies (4778 cases and 4272 controls) were included in our meta-analysis. The results suggested that FTO rs9939609 polymorphism (or its proxy) was marginally associated with PCOS risk after adjustment for body mass index (BMI) (OR = 1.26; 95%CI: 1.02–1.55). However, the marginal association was not stable after sensitivity analysis. In the subgroup analysis by ethnicity, the association was significant in East Asians (OR = 1.43, 95%CI = 1.30–1.59) but not in Caucasians (OR = 1.04, 95%CI = 0.85–1.29). Conclusions Our present meta-analysis indicated that FTO rs9939609 polymorphism (or its proxy) might not be associated with risk of PCOS in overall population. However, in East Asians, there might be a direct association between FTO variant and PCOS risk, which is independent of BMI (adiposity).
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Abstract
The Fat mass and obesity associated (FTO) gene is a newly identified genetic factor for obesity. However, the exact molecular mechanisms responsible for the effect of FTO on obesity remain largely unknown. Recent studies from genome-wide associated studies reveal that genetic variants in the FTO gene are associated not only with human adiposity and metabolic disorders, but also with cancer, a highly obesity-associated disease as well. Data from animal and cellular models further demonstrate that the perturbation of FTO enzymatic activity dysregulates genes related to energy metabolism, causing the malfunction of energy and adipose tissue homeostasis in mice. The most significant advance about FTO research is the recent discovery of FTO as the first N6-methyl-adenosine (m(6)A) RNA demethylase that catalyzes the m(6)A demethylation in α-ketoglutarate - and Fe(2+)-dependent manners. This finding provides the strong evidence that the dynamic and reversible chemical m(6)A modification on RNA may act as a novel epitranscriptomic marker. Furthermore, the FTO protein was observed to be partially localized onto nuclear speckles enriching mRNA processing factors, implying a potential role of FTO in regulating RNA processing. This review summarizes the recent progress about biological functions of FTO through disease-association studies as well as the data from in vitro and in vivo models, and highlights the biochemical features of FTO that might be linked to obesity.
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Affiliation(s)
- Xu Zhao
- Laboratory of Genome Variations and Precision Biomedicine, Beijing Institute of Genomics, Chinese Academy of Sciences, No. 1-7 Beichen West Road, Chaoyang District, Beijing, 100101, China
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