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Llanos AA, Aremu JB, Cheng TYD, Chen W, Chekmareva MA, Cespedes Feliciano EM, Qin B, Lin Y, Omene C, Khoury T, Hong CC, Yao S, Ambrosone CB, Bandera EV, Demissie K. Greater Body Fatness Is Associated With Higher Protein Expression of LEPR in Breast Tumor Tissues: A Cross-Sectional Analysis in the Women's Circle of Health Study. Front Endocrinol (Lausanne) 2022; 13:879164. [PMID: 35846306 PMCID: PMC9277012 DOI: 10.3389/fendo.2022.879164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 05/27/2022] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND The mechanisms underlying the association of overall and central body fatness with poorer breast cancer outcomes remain unclear; altered gene and/or protein expression of the adipokines and their receptors in breast tumors might play a role. METHODS In a sample of Black and White women with primary invasive breast cancer, we investigated associations of body mass index (BMI), waist circumference, hip circumference, waist-to-hip ratio (WHR), fat mass index (FMI), and percent body fat with protein expression (log-transformed, n = 722) and gene expression (log2-transformed, n = 148) of leptin (LEP), leptin receptor (LEPR), adiponectin (ADIPOQ), and adiponectin receptors 1 and 2 (ADIPOR1, ADIPOR2). Multivariable linear models, adjusting for race, menopausal status, and estrogen receptor status, were used to assess these associations, with Bonferroni correction for multiple comparisons. RESULTS In multivariable models, we found that increasing BMI (β = 0.0529, 95% CI: 0.0151, 0.0906) and FMI (β = 0.0832, 95% CI: 0.0268, 0.1397) were associated with higher LEP gene expression, corresponding to 34.5% and 38.3% increases in LEP gene expression for a standard deviation (SD) increase in BMI and FMI, respectively. Increasing BMI (β = 0.0028, 95% CI: 0.0011, 0.0045), waist circumference (β = 0.0013, 95% CI: 0.0005, 0.0022), hip circumference (β = 0.0015, 95% CI: 0.0007, 0.0024), and FMI (β = 0.0041, 95% CI: 0.0015, 0.0067) were associated with higher LEPR protein expression. These associations equate to 16.8%, 17.6%, 17.7%, 17.2% increases in LEPR protein expression for a 1-SD increase in BMI, waist circumference, hip circumference, and FMI, respectively. Further, these associations were stronger among White and postmenopausal women and ER+ cases; formal tests of interaction yielded evidence of effect modification by race. No associations of body fatness with LEP protein expression, LEPR gene expression, or protein or gene expression of ADIPOQ, ADIPOR1, and ADIPOR2 were found. CONCLUSIONS These findings support an association of increased body fatness - beyond overall body size measured using BMI - with higher LEP gene expression and higher LEPR protein expression in breast tumor tissues. Clarifying the impact of adiposity-related adipokine and adipokine receptor expression in breast tumors on long-term breast cancer outcomes is a critical next step.
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Affiliation(s)
- Adana A.M. Llanos
- Department of Epidemiology, Mailman School of Public Health, Columbia University Irving Medical Center, New York, NY, United States
- Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY, United States
- *Correspondence: Adana A.M. Llanos,
| | - John B. Aremu
- Department of Biostatistics and Epidemiology, Rutgers School of Public Health, Piscataway, NJ, United States
| | - Ting-Yuan David Cheng
- Department of Epidemiology, University of Florida, Gainesville, FL, United States
- Department of Cancer Prevention and Control, Roswell Park Comprehensive Cancer Center, Buffalo, NY, United States
| | - Wenjin Chen
- Department of Pathology and Laboratory Medicine, Rutgers Robert Wood Johnson Medical School and Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, United States
| | - Marina A. Chekmareva
- Department of Pathology and Laboratory Medicine, Rutgers Robert Wood Johnson Medical School and Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, United States
| | | | - Bo Qin
- Cancer Epidemiology and Health Outcomes, Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, United States
| | - Yong Lin
- Department of Biostatistics and Epidemiology, Rutgers School of Public Health, Piscataway, NJ, United States
| | - Coral Omene
- Department of Medicine, Rutgers Robert Wood Johnson Medical School and Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, United States
| | - Thaer Khoury
- Department of Cancer Prevention and Control, Roswell Park Comprehensive Cancer Center, Buffalo, NY, United States
| | - Chi-Chen Hong
- Department of Cancer Prevention and Control, Roswell Park Comprehensive Cancer Center, Buffalo, NY, United States
| | - Song Yao
- Department of Cancer Prevention and Control, Roswell Park Comprehensive Cancer Center, Buffalo, NY, United States
| | - Christine B. Ambrosone
- Department of Cancer Prevention and Control, Roswell Park Comprehensive Cancer Center, Buffalo, NY, United States
| | - Elisa V. Bandera
- Cancer Epidemiology and Health Outcomes, Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, United States
| | - Kitaw Demissie
- Department of Epidemiology and Biostatistics, SUNY Downstate Health Sciences University School of Public Health, Brooklyn, NY, United States
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Diéguez-Campa CE, Angel-Chávez LI, Reyes-Ruvalcaba D, Talavera-Zermeño MJ, Armendáriz-Cabral DA, Torres-Muro D, Pérez-Neri I. Leptin Levels and Q223R Leptin Receptor Gene Polymorphism in Obese Mexican Young Adults. EJIFCC 2020; 31:197-207. [PMID: 33061875 PMCID: PMC7545130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION The Q223R polymorphism of the leptin receptor (LEPR) gene is one of the most common polymorphisms and it is believed to be associated with a damaged capacity of LEPR signaling and with high circulating leptin levels. METHODS An observational, cross-sectional, analytical study was carried out in the Autonomous University of Ciudad Juarez, Mexico, where a sample of young adult participants (ranging from 18 to 30 years of age) was obtained. They were classified based on the results of body mass index: non-obese, and overweight/obese. The polymorphic variant was determined by Polymerase Chain Reaction (PCR) from the DNA sample and serum leptin levels were measured by Enzyme-Linked Immuno Sorbent Assay. RESULTS A total of 159 participants were included (non-obese, n=103; overweight/obese, n=56). Leptin levels were 15.14±12.3 ng/mL in the non-obese group and 26.13±19.0 ng/mL in the overweight/obese group (p≤0.001). The allelic frequencies of the Q and R alleles of the LEPR gene in the studied subjects were as follows: non-obese, Q=0.56, R=0.44; overweight/obese, Q=0.62, R=0.38. The relative risk for the Q/Q genotype was 1.18 (Cl 0.53-2.34), for Q/R was 1.14 (Cl 0.59-2.18) and for R/R was 0.59 (Cl 0.23-1.50). CONCLUSIONS This study shows that leptin levels are associated with overweight/obesity in Mexican young adults, but this is not related to the presence of the Q223R polymorphism in the LEPR gene, so the underlying mechanisms for a possible disturbance in leptin signaling in obese Mexican young adults await further studies.
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Affiliation(s)
- Carlos E. Diéguez-Campa
- Institute of Biomedical Sciences, Autonomous University of Ciudad Juarez, Fovisste Chamizal, Ciudad Juárez, Chihuahua, Mexico, Department of Neurochemistry. National Institute of Neurology and Neurosurgery, La Fama, Tlalpan, Mexico City, Mexico
| | - Luis I. Angel-Chávez
- Institute of Biomedical Sciences, Autonomous University of Ciudad Juarez, Fovisste Chamizal, Ciudad Juárez, Chihuahua, Mexico,Corresponding author: Luis I. Angel-Chávez Institute of Biomedical Sciences Autonomous University of Ciudad Juarez Av. Benjamin Franklin 4650 Zona PRONAF Ciudad Juárez 32310, Chihuahua Mexico E-mail:
| | - David Reyes-Ruvalcaba
- Institute of Biomedical Sciences, Autonomous University of Ciudad Juarez, Fovisste Chamizal, Ciudad Juárez, Chihuahua, Mexico
| | - María J. Talavera-Zermeño
- Institute of Biomedical Sciences, Autonomous University of Ciudad Juarez, Fovisste Chamizal, Ciudad Juárez, Chihuahua, Mexico
| | - Diego A. Armendáriz-Cabral
- Institute of Biomedical Sciences, Autonomous University of Ciudad Juarez, Fovisste Chamizal, Ciudad Juárez, Chihuahua, Mexico
| | - Dayanara Torres-Muro
- Institute of Biomedical Sciences, Autonomous University of Ciudad Juarez, Fovisste Chamizal, Ciudad Juárez, Chihuahua, Mexico
| | - Iván Pérez-Neri
- Department of Neurochemistry. National Institute of Neurology and Neurosurgery, La Fama, Tlalpan, Mexico City, Mexico
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Llanos AAM, Lin Y, Chen W, Yao S, Norin J, Chekmareva MA, Omene C, Cong L, Omilian AR, Khoury T, Hong CC, Ganesan S, Foran DJ, Higgins M, Ambrosone CB, Bandera EV, Demissie K. Immunohistochemical analysis of adipokine and adipokine receptor expression in the breast tumor microenvironment: associations of lower leptin receptor expression with estrogen receptor-negative status and triple-negative subtype. Breast Cancer Res 2020; 22:18. [PMID: 32046756 PMCID: PMC7014630 DOI: 10.1186/s13058-020-1256-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 01/29/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND The molecular mechanisms underlying the association between increased adiposity and aggressive breast cancer phenotypes remain unclear, but likely involve the adipokines, leptin (LEP) and adiponectin (ADIPOQ), and their receptors (LEPR, ADIPOR1, ADIPOR2). METHODS We used immunohistochemistry (IHC) to assess LEP, LEPR, ADIPOQ, ADIPOR1, and ADIPOR2 expression in breast tumor tissue microarrays among a sample of 720 women recently diagnosed with breast cancer (540 of whom self-identified as Black). We scored IHC expression quantitatively, using digital pathology analysis. We abstracted data on tumor grade, tumor size, tumor stage, lymph node status, Ki67, estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER2) from pathology records, and used ER, PR, and HER2 expression data to classify breast cancer subtype. We used multivariable mixed effects models to estimate associations of IHC expression with tumor clinicopathology, in the overall sample and separately among Blacks. RESULTS Larger proportions of Black than White women were overweight or obese and had more aggressive tumor features. Older age, Black race, postmenopausal status, and higher body mass index were associated with higher LEPR IHC expression. In multivariable models, lower LEPR IHC expression was associated with ER-negative status and triple-negative subtype (P < 0.0001) in the overall sample and among Black women only. LEP, ADIPOQ, ADIPOR1, and ADIPOR2 IHC expression were not significantly associated with breast tumor clinicopathology. CONCLUSIONS Lower LEPR IHC expression within the breast tumor microenvironment might contribute mechanistically to inter-individual variation in aggressive breast cancer clinicopathology, particularly ER-negative status and triple-negative subtype.
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Affiliation(s)
- Adana A M Llanos
- Department of Biostatistics and Epidemiology, Rutgers School of Public Health, Piscataway, NJ, USA. .,Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA.
| | - Yong Lin
- Department of Biostatistics and Epidemiology, Rutgers School of Public Health, Piscataway, NJ, USA.,Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA
| | - Wenjin Chen
- Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA.,Department of Pathology and Laboratory Medicine, Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - Song Yao
- Department of Cancer Prevention and Control, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - Jorden Norin
- Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA.,Department of Cell Biology and Neuroscience, Rutgers School of Arts and Sciences, New Brunswick, NJ, USA
| | - Marina A Chekmareva
- Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA.,Department of Pathology and Laboratory Medicine, Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - Coral Omene
- Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA.,Department of Medicine, Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - Lei Cong
- Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA
| | - Angela R Omilian
- Department of Cancer Prevention and Control, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - Thaer Khoury
- Department of Cancer Prevention and Control, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - Chi-Chen Hong
- Department of Cancer Prevention and Control, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - Shridar Ganesan
- Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA.,Department of Medicine, Robert Wood Johnson Medical School, New Brunswick, NJ, USA.,Department of Pharmacology, Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - David J Foran
- Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA.,Department of Pathology and Laboratory Medicine, Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - Michael Higgins
- Department of Molecular and Cellular Biology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - Christine B Ambrosone
- Department of Cancer Prevention and Control, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - Elisa V Bandera
- Department of Biostatistics and Epidemiology, Rutgers School of Public Health, Piscataway, NJ, USA.,Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA
| | - Kitaw Demissie
- Department of Epidemiology and Biostatistics, SUNY Downstate Health Sciences University School of Public Health, Brooklyn, NY, USA
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Foucan L, Bassien-Capsa V, Rambhojan C, Lacorte JM, Larifla L. Influence of K656N Polymorphism of the Leptin Receptor Gene on Obesity-Related Traits in Nondiabetic Afro-Caribbean Individuals. Metab Syndr Relat Disord 2019; 17:197-203. [PMID: 30807250 DOI: 10.1089/met.2018.0133] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Background: Ethnic variations have been reported in allelic frequencies of the leptin receptor gene (LEPR) with population-specific effects. We aimed to explore the association of LEPR polymorphisms with obesity, metabolic syndrome (MetS), and leptin levels in Afro-Caribbean nondiabetic subjects. Methods: Genotypic analysis of three LEPR polymorphisms (K109R, Q223R, and K656N) was performed using TaqMan allelic discrimination assays. Associations were measured with phenotypic variables, including body mass index (BMI), waist circumference (WC), and leptin levels. Linear and logistic regressions were performed to evaluate the effects of single-nucleotide polymorphisms (SNPs). Results: Mean age was 46 ± 12 years. Among the 375 participants, 29.3% were obese, 36.3% had abdominal obesity, and 18.1% had MetS. Significant association between BMI (P < 0.002) and WC (P < 0.005) was observed for K656N, whereas the associations were not statistically significant for the other two SNPs. No association was found with leptin levels for the three SNPs. The variant allele frequencies for LEPR 109R, 223R, and 656N were 0.16, 0.46, and 0.20, respectively. In dominant models, the variant allele 656N (GC/CC vs. GG) was associated with prevalence of obesity [odds ratio (OR) 1.82; P = 0.012] and abdominal obesity (OR 2.00; P = 0.007), but not significantly with prevalence of MetS (OR 1.72; P = 0.029). Individuals carrying four variant alleles of the three SNPs had a significantly higher risk of obesity (OR 2.86; P = 0.032) than those carrying none variant allele. Conclusion: Our results suggest an influence of K656N polymorphism in the LEPR gene on obesity and abdominal obesity in this Afro-Caribbean population.
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Affiliation(s)
- Lydia Foucan
- 1 Research Team on Cardiometabolic Risk ECM/LAMIA EA4540, University of Antilles, Pointe-à-Pitre, Guadeloupe, FWI, France.,2 Cardiology Unit, University Hospital, Pointe-à-Pitre, Guadeloupe, FWI, France
| | - Valérie Bassien-Capsa
- 1 Research Team on Cardiometabolic Risk ECM/LAMIA EA4540, University of Antilles, Pointe-à-Pitre, Guadeloupe, FWI, France
| | - Christine Rambhojan
- 1 Research Team on Cardiometabolic Risk ECM/LAMIA EA4540, University of Antilles, Pointe-à-Pitre, Guadeloupe, FWI, France
| | - Jean-Marc Lacorte
- 3 Department of Endocrine and Oncological Biochemistry, AP-HP, University Hospitals of Pitié-Salpétrière-Charles Foix, Paris, France.,4 Inserm UMR_S 1166, Research Institute of Cardiovascular Disease, Metabolism and Nutrition, Paris, France
| | - Laurent Larifla
- 1 Research Team on Cardiometabolic Risk ECM/LAMIA EA4540, University of Antilles, Pointe-à-Pitre, Guadeloupe, FWI, France.,2 Cardiology Unit, University Hospital, Pointe-à-Pitre, Guadeloupe, FWI, France
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Nowzari Z, Masoumi M, Nazari-Robati M, Akbari H, Shahrokhi N, Asadikaram G. Association of polymorphisms of leptin, leptin receptor and apelin receptor genes with susceptibility to coronary artery disease and hypertension. Life Sci 2018; 207:166-171. [PMID: 29883719 DOI: 10.1016/j.lfs.2018.06.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 05/29/2018] [Accepted: 06/05/2018] [Indexed: 12/23/2022]
Abstract
AIMS Apelin and leptin are factors which have a potential physiological and pathological role in cardiovascular homoeostasis. Apelin receptor (APLNR), leptin receptor (LEPR) and leptin variants may affect the vascular tone in heart or peripheral circulation, thereby predisposing patients to hypertension and coronary artery disease (CAD). The aim of the present study was to evaluate four single nucleotide polymorphisms (SNPs) of APLNR genes (rs11544374 and rs948847), LEPR (rs1137101) and leptin (rs7799039) gene in patients with CAD and hypertension. MATERIALS AND METHODS This case-control study was carried out on 286 CAD-suspected patients. The participants were divided into four subgroups including: CAD patients with no hypertension (H-CAD+), hypertensive patients with no CAD (H+CAD-), CAD patients with hypertension (H+CAD+) and non-hypertensive non-CAD subjects as control group (H-CAD-). Genomic DNA from whole blood was extracted and four SNPs were assessed using PCR-RFLP. KEY FINDINGS A significant difference was found in the genotype frequency of APLNR rs11544374 gene in H+CAD+ and H-CAD+ groups compared to control subjects (P < 0.001 for both comparisons). Regarding the rs1137101, the prevalence of A allele compared to G allele was significantly different among the four groups (P = 0.02). Results of multinomial regression analysis indicated that G allele carriers in the recessive genetic model (AA vs. AG + GG) of rs11544374 had a significantly protective effect compared to H-CAD+ and H+CAD+after adjustment (OR = 0.12; 95% CI = 0.02-0.61; P = 0.01 and OR = 0.40; 95% CI = 0.17-0.98; P = 0.04, respectively). SIGNIFICANCE The findings of present study revealed that the APLNR rs11544374 gene polymorphism might serve as predisposing factor in CAD.
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Affiliation(s)
- Zohreh Nowzari
- Endocrinology and Metabolism Research Center, Institute of Basic and Clinical Physiology Sciences, Kerman University of Medical Sciences, Kerman, Iran; Department of Biochemistry, Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Mohammad Masoumi
- Cardiovascular Research Center, Department of Cardiology, Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Mahdieh Nazari-Robati
- Department of Biochemistry, Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Hamed Akbari
- Department of Biochemistry, Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Nader Shahrokhi
- Physiology Research Center, Institute of Basic and Clinical Physiology Sciences, Kerman University of Medical Sciences, Kerman, Iran
| | - Gholamreza Asadikaram
- Department of Biochemistry, Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran; Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran.
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Angel-Chávez LI, Ruelas-Cinco E, Hernández-Bello J, Castro E, Vázquez-Villamar M, Parra-Rojas I, Brennan-Bourdon LM, Muñoz-Barrios S, Guerrero-Velázquez C, Muñoz-Valle JF. Influence of serum leptin levels and Q223R leptin receptor polymorphism on clinical characteristic of patients with rheumatoid arthritis from Western Mexico. EJIFCC 2018; 29:26-35. [PMID: 29765284 PMCID: PMC5949616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/30/2022]
Abstract
OBJECTIVE The aim of the present study was to evaluate the possible association between the Q223R Leptin receptor (LEPR) polymorphism (A>G; rs1137101) and leptin levels in patients with rheumatoid arthritis (RA) from Western Mexico. METHODS A cross-sectional study was performed with 70 RA patients and 74 controls subject (CS). Disease activity was evaluated using DAS28 score, the Q223R LEPR polymorphism was determined by the Polymerase Chain Reaction-Restriction Fragment Length Polymorphism (PCR-RFLP) and serum leptin levels, erythrocyte sedimentation rate (ESR), C-reactive protein (CRP) and rheumatoid factor (RF) were quantified. RESULTS RA patients had significant high serum leptin levels compared with CS; leptin levels correlated strongly with body composition measures, but not with inflammatory markers, disease evolution, and activity. The genotype and allele frequencies of the Q223R LEPR polymorphism were not associated with RA. Similarly, leptin levels did not differ between Q223R LEPR genotypes. CONCLUSION The LEPR Q223R polymorphism was not associated with RA risk in patients from Mexican population, even though high levels of serum leptin were present and these could explain the low weight observed in RA patients when they were compared to control subjects. However, the serum leptin levels did not correlate with inflammatory markers, severity and disease evolution.
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Affiliation(s)
- Luis I. Angel-Chávez
- Instituto de Ciencias Biomédicas, Departamento de Ciencias de la Salud, Universidad Autónoma de Ciudad Juárez, Mexico
| | - Elizabeth Ruelas-Cinco
- Instituto de Investigación en Ciencias Biomédicas, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Mexico
| | - Jorge Hernández-Bello
- Instituto de Investigación en Ciencias Biomédicas, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Mexico
| | - Elena Castro
- Centro Universitario de Investigaciones Biomédicas, Universidad de Colima, Mexico
| | - Mirna Vázquez-Villamar
- Unidad Académica de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, Mexico
| | - Isela Parra-Rojas
- Unidad Académica de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, Mexico
| | - L. Michele Brennan-Bourdon
- Instituto de Investigación en Ciencias Biomédicas, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Mexico
| | - Salvador Muñoz-Barrios
- Instituto de Investigación en Ciencias Biomédicas, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Mexico
| | - Celia Guerrero-Velázquez
- Instituto de Investigación en Ciencias Biomédicas, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Mexico
| | - José Francisco Muñoz-Valle
- Instituto de Investigación en Ciencias Biomédicas, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Mexico,Corresponding author: José Francisco Muñoz-Valle; Insurgentes 244-1; Colonia Lomas de Atemajac; C.P. 45178; Zapopan, Jalisco; Mexico; Phone: +52 3338540154; E-mail:
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Wu L, Sun D. Leptin Receptor Gene Polymorphism and the Risk of Cardiovascular Disease: A Systemic Review and Meta-Analysis. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 14:ijerph14040375. [PMID: 28368354 PMCID: PMC5409576 DOI: 10.3390/ijerph14040375] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 03/23/2017] [Accepted: 03/29/2017] [Indexed: 01/25/2023]
Abstract
OBJECTIVE Few studies have assessed the association between leptin receptor (LEPR) gene polymorphism and the risk of cardiovascular disease (CVD). Of the few epidemiological studies on this topic, the results are still controversial. METHODS PubMed and Embase were screened for studies from their inception to 9 October 2016. The pooled odds ratio (OR) with the corresponding confidence intervals (CI) were used to measure the effect size for studies that reported the association under allelic, homozygous, and dominant models. Pre-specified characteristics were conducted in the subgroup analysis. Heterogeneity between subgroups was evaluated by meta-regression analysis. RESULTS Seven eligible studies involving 44,133 participants were included in our meta-analysis. Borderline significant association was observed between the LEPR gene polymorphism (rs1137101, rs1137100, rs6700896, and rs8179183) and the increased risk of CVD with considerable heterogeneity under the allelic model, and the overall pooled OR (95% CI) was 1.10 (0.99, 1.22). The LEPR gene variant rs6700896, 109G allele, and 109GG genotype were significantly associated with the increased risk of CVD. Furthermore, stratified group analysis revealed that the association was more pronounced for stroke. Race-differences might also cause the considerable heterogeneity and non-significant association. CONCLUSIONS This is the first systematic review and meta-analysis to investigate the association between LEPR gene variants and CVD risk. Some LEPR gene variants were significantly associated with the increased risk of CVD. However, the present study is limited in its small number of included studies, considerable heterogeneity, and observational study design. Further research is still warranted to confirm the magnitude of the association.
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Affiliation(s)
- Lei Wu
- Department of Epidemiology, Institute of Geriatrics, Chinese People's Liberation Army General Hospital, Beijing 100853, China.
| | - Dali Sun
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77072, USA.
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Tang H, Zhang Z, Li Z, Lin J, Fang DZ. High-Carbohydrate/Low-Fat Diet-Induced Gender-Specific Serum Lipid Profile Changes Are Associated with LEPR Polymorphisms in Chinese Youth. ANNALS OF NUTRITION AND METABOLISM 2017; 70:1-8. [PMID: 28064282 DOI: 10.1159/000455165] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Accepted: 12/12/2016] [Indexed: 11/19/2022]
Abstract
BACKGROUND/AIMS The study aimed to investigate the interactions of genetic variants in the leptin receptor (LEPR) gene with lipid profile changes following a high-carbohydrate/low-fat (HC/LF) diet in a Chinese Han population. METHODS Fifty-six healthy young subjects were given washout diets, followed by HC/LF diets consisting of 15% fat and 70% carbohydrate for 6 days. Serum lipid profiles and insulin levels before and after HC/LF diets were analyzed. RESULTS Statistically elevated high-density lipoprotein cholesterol (HDL-C), apolipoprotein A-1 (apoA-I), and insulin levels were only observed in the GG genotype of LEPR Lys109Arg but not in the A carriers after HC/LF diet. When gender was taken into account, significantly increased HDL-C, apoA-I, and insulin levels were found in women with the GG genotype. Moreover, lower low-density lipoprotein cholesterol (LDL-C) and higher insulin levels were only observed in subjects with the GG genotype of LEPR Gln223Arg, while higher HDL-C and apoA-I were only found in the A allele carriers. Additionally, the lower LDL-C and body mass index (BMI), and higher HDL-C and insulin levels were only observed in subjects with the GG genotype of LEPR Lys656Asn. CONCLUSIONS LEPR polymorphisms contribute to the heterogeneities in BMI, LDL-C, and HDL-C responsiveness that are induced by a HC/LF diet in healthy young Chinese adults.
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Affiliation(s)
- Hui Tang
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
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Polymorphism in leptin receptor gene was associated with obesity in Yogyakarta, Indonesia. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2016. [DOI: 10.1016/j.ejmhg.2015.12.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Prevalence, Risk Factors, and Genetic Traits in Metabolically Healthy and Unhealthy Obese Individuals. BIOMED RESEARCH INTERNATIONAL 2015; 2015:548734. [PMID: 26504811 PMCID: PMC4609360 DOI: 10.1155/2015/548734] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 07/19/2015] [Accepted: 08/31/2015] [Indexed: 01/01/2023]
Abstract
Objective. To assess prevalence of metabolically healthy individuals among patients with abdominal obesity (AO) and to determine phenotype and potential genetic traits associated with a benign metabolic status. Methods. 503 AO patients without cardiovascular diseases were examined. Waist circumference (WC), BMI, blood pressure, plasma glucose and serum insulin levels, HOMA-IR, lipid profile, and adiponectin (AN) and leptin (LEP) concentrations in serum were measured. Polymorphisms A19G and Q223R of the LEP and LEP receptor gene, and G276T and T45G of the AN gene were investigated. Results. 91.3% of patients were metabolically unhealthy obese (MUO), and 8.7% metabolically healthy obese (MHO). MHO patients were younger, and had lesser BMI and WC, while duration of obesity, frequency, and duration of physical training were greater than MUO patients (p < 0.05). In MHO and MUO patients distribution of the G19G, G19A, and A19A genotypes of the LEP gene and G276G, G276T, and T276T genotypes of AN gene did not differ. The Т45Т genotype was associated with increase of metabolic disorders' risk for patients with АО (OR = 2.331; 95% CI = 1.121 ÷ 5.132). Conclusions. Prevalence of MHO individuals among patients with AO is low. Benign metabolic status was associated with younger age, lower waist circumference, and higher physical activity, shorter duration of obesity, and G45G adiponectin genotype carriage.
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Tang H, Zhang Z, Li ZK, Lin J, Fang DZ. Association of Leptin Receptor Gene Polymorphisms with Genetic Susceptibility to Ischemic Stroke. J Stroke Cerebrovasc Dis 2015; 24:2128-33. [PMID: 26150085 DOI: 10.1016/j.jstrokecerebrovasdis.2015.05.036] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Revised: 05/20/2015] [Accepted: 05/26/2015] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Ischemic stroke is a multifactorial disease that is influenced by both genetic and environmental factors. Identification of the genetic factors that are underlining this disease is important. Leptin receptor (LEPR) mediates the leptin-regulated human energy homeostasis, and mutations of LEPR can increase cardiovascular risks and may predispose an individual to ischemic stroke. METHODS We analyzed distribution of 3 single nucleotide polymorphisms (SNPs) of LEPR gene (Lys109Arg, Gln223Arg, and Lys656Asn) in 101 patients with ischemic stroke and 105 controls by polymerase chain reaction-restriction fragment length polymorphism strategy. RESULTS Our results showed that there were significant differences in the genotype and allele distribution of Lys109Arg and Gln223Arg polymorphisms of the LEPR gene between case and control. The 109GG and 223GG genotype were associated with a significantly increased risk of ischemic stroke (odds ratio [OR], 3.23; P = .001 and OR, 2.87; P = .008, respectively). The 109G and 223G alleles carriers were correlated with an increased incidence of ischemic stroke (OR, 2.72; P = .001; OR, 2.94; P = .004). By haplotype analyses, we found that 109A/223G/656G haplotype was associated with an increased risk of ischemic stroke although this was not observed in the control group (OR, 3.86; P = .029). CONCLUSIONS LEPR 109GG and 223GG genotypes and the 109G and 223G alleles are associated with the risk of ischemic stroke. Our data suggest that LEPR Lys109Arg and Gln223Arg polymorphisms could be used as genetic predictive factor for ischemic stroke.
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Affiliation(s)
- Hui Tang
- Department of Biochemistry and Molecular Biology, West China School of Preclinical and Forensic Medicine, SiChuan University, ChengDu, China
| | - Zhen Zhang
- Department of Biochemistry and Molecular Biology, West China School of Preclinical and Forensic Medicine, SiChuan University, ChengDu, China
| | - Zheng-Ke Li
- Department of Biochemistry and Molecular Biology, West China School of Preclinical and Forensic Medicine, SiChuan University, ChengDu, China
| | - Jia Lin
- Department of Biochemistry and Molecular Biology, West China School of Preclinical and Forensic Medicine, SiChuan University, ChengDu, China
| | - Ding-Zhi Fang
- Department of Biochemistry and Molecular Biology, West China School of Preclinical and Forensic Medicine, SiChuan University, ChengDu, China.
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Ng ZY, Veerapen MK, Hon WM, Lim RLH. Association of leptin/receptor and TNF-α gene variants with adolescent obesity in Malaysia. Pediatr Int 2014; 56:689-97. [PMID: 24628746 DOI: 10.1111/ped.12336] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 01/07/2014] [Accepted: 03/03/2014] [Indexed: 11/27/2022]
Abstract
BACKGROUND Leptin (LEP) G-2548A (rs7799039), leptin receptor (LEPR) Q223R (rs1137101) and tumor necrosis factor (TNF)-α G-308A (rs1800629) gene variants have been reported to be associated with obesity, although results for subjects from different countries have been controversial. The aim of this study was to determine the prevalence of overweight and obesity in Malaysian adolescents and the association of these polymorphisms with overweight and obese or over-fat adolescents. METHODS A total of 613 adolescents (241 Malay, 219 Chinese, 153 Indian) were enrolled. Anthropometric measurements of body mass index (BMI) and body fat percentage were used to classify subjects as controls (non-overweight/obese or normal fat) or as cases (overweight/obese or over-fat). Genomic DNA was extracted from oral buccal mucosa cells for genotyping using polymerase chain reaction-restriction fragment length polymorphism and data obtained were statistically analyzed. RESULTS A total of 23.3% of subjects were overweight/obese whereas 11.4% were over-fat; there were significantly more overweight/obese and over-fat Indian and Malay adolescents compared to Chinese (P < 0.001). A allele was the minor one for LEPR Q223R and TNF-α G-308A in all ethnic groups, whereas G allele was minor for LEP G-2548A in Chinese and Malay adolescents, except for Indian adolescents. Indian male adolescents with AA genotype for LEP G-2548A were associated with overweight/obesity (P = 0.025; odds ratio, 3.64; 95% confidence interval: 1.15-11.54). Despite the lack of association observed for LEPR Q223R and TNF-α G-308A, Indian and Chinese subjects with AA risk genotype for LEPR Q223R/LEP G-2548A and TNF-α G-308A/LEP G-2548A, respectively, had increased mean BMI (P = 0.049, P = 0.016). CONCLUSIONS Genotype distribution and association of these polymorphisms with overweight/obesity vary between ethnic groups and genders. Nevertheless, the LEP G-2548A risk allele may be associated with overweight/obese Indian male adolescents in Malaysia.
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Affiliation(s)
- Zoe Yi Ng
- Faculty of Applied Sciences, UCSI University, Kuala Lumpur, Malaysia
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13
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Llanos AAM, Brasky TM, Mathew J, Makambi KH, Marian C, Dumitrescu RG, Freudenheim JL, Shields PG. Genetic variation in adipokine genes and associations with adiponectin and leptin concentrations in plasma and breast tissue. Cancer Epidemiol Biomarkers Prev 2014; 23:1559-68. [PMID: 24825736 DOI: 10.1158/1055-9965.epi-14-0173] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Circulating adipokines may be associated with breast cancer risk. Genetic variants governing adipokines and adipokine receptors may also predict risk, but their effect on breast adipokine concentrations is unknown. METHODS We conducted a cross-sectional analysis of functional SNPs in 5 adipokine genes [adiponectin, leptin (LEP), and their receptors] among 85 cancer-free women who were undergoing reduction mammoplasty. RESULTS In multivariable-adjusted regression models, compared with the common GG genotype, the AA genotype of the LEP A19G SNP was associated with 27% lower plasma adiponectin [ratio, 0.73; 95% confidence interval (CI), 0.54-0.98] and leptin (ratio, 0.73; 95% CI, 0.55-0.96). Women with the AG genotype of LEP A19G had 39% lower breast leptin (ratio, 0.61; 95% CI, 0.39-0.97) compared with those with the GG genotype. No associations were observed for SNPs in the remaining genes. CONCLUSIONS Genetic variation in LEP may alter endogenous adipokine concentrations in circulation and in breast tissues. IMPACT These preliminary findings may support the hypothesis that genetic variation in adipokine genes modifies circulating adipokine concentrations and possibly leptin concentrations in local breast tissues, which may be associated with breast cancer risk.
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Affiliation(s)
- Adana A M Llanos
- The Ohio State University Comprehensive Cancer Center; RBHS-School of Public Health and the Rutgers Cancer Institute of New Jersey, Rutgers, The State University of New Jersey, New Brunswick, New Jersey;
| | - Theodore M Brasky
- The Ohio State University Comprehensive Cancer Center; Division of Cancer Prevention and Control, College of Medicine, The Ohio State University, Columbus, Ohio
| | - Jeena Mathew
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC
| | - Kepher H Makambi
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC
| | - Catalin Marian
- The Ohio State University Comprehensive Cancer Center; Division of Cancer Prevention and Control, College of Medicine, The Ohio State University, Columbus, Ohio; University of Medicine and Pharmacy Timisoara, Timisoara, Romania; and
| | | | - Jo L Freudenheim
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, University at Buffalo, Buffalo, New York
| | - Peter G Shields
- The Ohio State University Comprehensive Cancer Center; Division of Cancer Prevention and Control, College of Medicine, The Ohio State University, Columbus, Ohio
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Pena GDG, Guimarães ALS, Veloso RR, Reis TC, Gomes CS, Neto JFR, Velasquez-Melendez G. Leptin Receptor Gene Gln223Arg Polymorphism Is Not Associated with Hypertension: A Preliminary Population-Based Cross-Sectional Study. Cardiol Res Pract 2014; 2014:879037. [PMID: 24772364 PMCID: PMC3950908 DOI: 10.1155/2014/879037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Accepted: 11/11/2013] [Indexed: 12/24/2022] Open
Abstract
Hypertension is responsible for high morbidity and mortality as one of the most important cardiometabolic risk factors. The aim of the study was to investigate whether the Gln223Arg in the leptin receptor (LEPR) influences the prevalence of hypertension. A cross-sectional study was carried out in individuals aged ≥ 18 years. Polymorphism identification was performed using PCR-RFLP analysis. Participants with blood pressure ≥ 140/90 mmHg or medication use were considered hypertensive. Frequencies, means, cross-tabulations, and multivariate models were produced to study differences in hypertension prevalence by genotypes. The study includes 470 participants. The frequency of GG polymorphism variant was 10.43%, 46.81% AG, and 42.77% AA. The distribution of hypertension frequency by LEPR genotypes was the following: AA 43.8%, AG 40.4%, and GG 40.8%; there were no significant differences between groups. Comparative analysis which used multivariate Poisson regression adjusted by many potential confounders (age, sex, schooling, smoking, alcohol intake, obesity, and family history of parental obesity) did not modify this result. In this large sample of population-based study, the association of the LEPR Gln223Arg gene polymorphism with hypertension was not observed.
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Affiliation(s)
- Geórgia das Graças Pena
- Maternal-Child Nursing and Public Health Department of the Nursing School, Nursing School, Federal University of Minas Gerais, (UFMG), 30130-100 Belo Horizonte, MG, Brazil
| | - Andre L. S. Guimarães
- Department of Dentistry, Program in Health Sciences, State University of Montes Claros (UNIMONTES), 39401-001Montes Claros, MG, Brazil
| | - Rosângela R. Veloso
- Department of Dentistry, Program in Health Sciences, State University of Montes Claros (UNIMONTES), 39401-001Montes Claros, MG, Brazil
| | - Tatiana C. Reis
- Department of Dentistry, Program in Health Sciences, State University of Montes Claros (UNIMONTES), 39401-001Montes Claros, MG, Brazil
| | - Crizian S. Gomes
- Maternal-Child Nursing and Public Health Department of the Nursing School, Nursing School, Federal University of Minas Gerais, (UFMG), 30130-100 Belo Horizonte, MG, Brazil
| | - João F. R. Neto
- Department of Dentistry, Program in Health Sciences, State University of Montes Claros (UNIMONTES), 39401-001Montes Claros, MG, Brazil
| | - Gustavo Velasquez-Melendez
- Maternal-Child Nursing and Public Health Department of the Nursing School, Nursing School, Federal University of Minas Gerais, (UFMG), 30130-100 Belo Horizonte, MG, Brazil
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Wells JCK, Cortina-Borja M. Different associations of subscapular and triceps skinfold thicknesses with pathogen load: an ecogeographical analysis. Am J Hum Biol 2013; 25:594-605. [PMID: 23913438 DOI: 10.1002/ajhb.22418] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2012] [Revised: 04/29/2013] [Accepted: 05/24/2013] [Indexed: 11/11/2022] Open
Abstract
OBJECTIVES The dominant evolutionary perspective on adipose tissue has considered it a relatively inert energy store. However, variability in adipose tissue distribution has recently been associated with age, parity, thermal environment and immune function. Genes regulating the innate immune system are more strongly expressed in deep-lying than peripheral adipose tissue. We hypothesized that central adiposity would correlate more strongly than peripheral adiposity with pathogen load across populations. METHODS Primary outcomes were subscapular and triceps skinfolds from 133 male and 106 female populations. National values for disability-adjusted life years lost, attributable to infectious diseases, were used to index pathogen load. Linear mixed-effects models were fitted, including a random effect term by country to investigate the association of each skinfold with pathogen load, adjusting for the other skinfold, mean annual temperature and clustering of the populations across countries. RESULTS Adjusting for subscapular skinfold, triceps skinfold was not associated with pathogen load in either sex. Adjusting for triceps skinfold, subscapular skinfold was negatively associated with pathogen load in both sexes (P < 0.02). These associations were independent of variability in annual temperature. Adjusting for pathogen load and temperature, Oceanic populations had a different fat distribution compared to other populations. CONCLUSIONS Across populations, higher pathogen load was associated with reduced central but not peripheral skinfolds, supporting the hypothesis that central adiposity is more closely associated with immune function. This scenario might explain why some populations increase disproportionately in central adiposity when the environment shifts from low-energy high-pathogen status to high-energy low-pathogen status.
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Affiliation(s)
- Jonathan C K Wells
- Childhood Nutrition Research Centre, UCL Institute of Child Health, 30 Guilford Street, London, WC1N 1EH, United Kingdom
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Plasma leptin levels, LEPR Q223R polymorphism and mammographic breast density: a cross-sectional study. Int J Biol Markers 2013; 28:161-7. [PMID: 23564622 DOI: 10.5301/jbm.5000016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/12/2013] [Indexed: 12/27/2022]
Abstract
Obesity is associated with breast cancer in post-menopausal women, and breast density is a marker of breast cancer risk. Leptin is produced by the adipose tissue, acts through receptors that are polymorphic in nature, and is considered a cancer growth factor. The relationship between body mass index, leptin, leptin receptors and breast density is not well studied. A cross-sectional analysis in 392 post-menopausal healthy women was conducted; participants provided permission to obtain copies of their most recent screening mammogram. Non-fasting plasma leptin levels were determined using a commercially available leptin ELISA kit. Analysis of the Q223R genotypes of the LEPR gene were performed by PCR followed by restriction fragment length polymorphism analysis using DNA extracted from buffy coat samples. A statistically significant positive relationship was observed between leptin levels and body mass index (p<0.0001); leptin was significantly positively associated with mammography total breast area and non-dense breast area (p<0.0001), while it was inversely associated with percent breast density (p<0.0001). Leptin levels varied across the LEPR Q223R polymorphism, and were higher in women homozygous for the AA variant. Percent breast density decreased across the LEPR Q223R genotype, with lower percent density in women with the AA genotype. When dense area was considered according to quartiles of leptin and stratified by LEPR Q223R, a significant inverse trend between leptin levels and dense breast area was observed only among women with the G/G genotype (p-trend<0.001). After adjustment for possible confounders, leptin levels were significantly inversely associated with percent breast density (p=0.01). A significant interaction between body mass index and leptin levels on percent breast density was observed (p=0.03). These findings suggest that the association between leptin and breast density may vary by LEPR Q223R genotype, and that body mass index and leptin may act in an interactive way in determining breast density.
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Sawicka-Żukowska M, Krawczuk-Rybak M, Muszynska-Roslan K, Panasiuk A, Latoch E, Konstantynowicz J. Does Q223R Polymorphism of Leptin Receptor Influence on Anthropometric Parameters and Bone Density in Childhood Cancer Survivors? Int J Endocrinol 2013; 2013:805312. [PMID: 24319457 PMCID: PMC3834979 DOI: 10.1155/2013/805312] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 07/07/2013] [Accepted: 07/08/2013] [Indexed: 12/29/2022] Open
Abstract
Childhood cancer survivors are in augmented risk for developing obesity. For many factors leptin and leptin receptor gene polymorphism play an important role in the development and metabolism not only of fat, but also, bone tissue. The aim of the analysis was to find the relationships between Q223R, leptin levels, and anthropometric parameters. Patients and Methods. In the study 74 cancer survivors participated (ALL n = 64, lymphomas n = 10), and the control group consisted of 51 healthy peers. Leptin blood concentration was determined by ELISA method. To estimate leptin receptor gene polymorphism, RFLP method was used. Bone mineral density (BMD) and content (BMC), fat, and lean tissue measurements were obtained by DXA. Results. We found no correlations between serum leptin concentrations and anthropometric parameters nor BMD. Serum leptin concentrations were significantly lower in the group of cancer survivors compared to controls; however, in those overweight from examined group we found leptin levels higher than those in nonoverweight. Genotype Q223R was not associated with higher leptin levels, BMI, BMD, body fat or lean tissue. Conclusion. To our knowledge, this is the first report describing the relationship between BMD and Q223R polymorphism in childhood cancer survivors. Further analysis, based on a larger group of patients, is needed to confirm these findings.
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Affiliation(s)
- Malgorzata Sawicka-Żukowska
- Department of Pediatric Oncology and Hematology, Medical University of Bialystok, 15-274 Bialystok, Poland
- *Malgorzata Sawicka-Żukowska:
| | - Maryna Krawczuk-Rybak
- Department of Pediatric Oncology and Hematology, Medical University of Bialystok, 15-274 Bialystok, Poland
| | - Katarzyna Muszynska-Roslan
- Department of Pediatric Oncology and Hematology, Medical University of Bialystok, 15-274 Bialystok, Poland
| | - Anna Panasiuk
- Department of Pediatric Oncology and Hematology, Medical University of Bialystok, 15-274 Bialystok, Poland
| | - Eryk Latoch
- Department of Pediatric Oncology and Hematology, Medical University of Bialystok, 15-274 Bialystok, Poland
| | - Jerzy Konstantynowicz
- Department of Pediatric Oncology and Hematology, Medical University of Bialystok, 15-274 Bialystok, Poland
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Llanos AA, Dumitrescu RG, Marian C, Makambi KH, Spear SL, Kallakury BVS, Perry DJ, Convit RJ, Platek ME, Millen AE, Adams-Campbell LL, Freudenheim JL, Shields PG. Adipokines in plasma and breast tissues: associations with breast cancer risk factors. Cancer Epidemiol Biomarkers Prev 2012; 21:1745-55. [PMID: 22892282 DOI: 10.1158/1055-9965.epi-12-0016] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Blood adipokines are associated with breast cancer risk; however, blood-breast adipokine correlations and factors that explain variation in adipokines are unknown. METHODS Plasma (n = 155) and breast (n = 85) leptin and adiponectin were assessed by immunoassays in women with no history of cancer. Multivariable-adjusted regression models were used to determine breast adipokine associations. RESULTS Through body mass index (BMI)-adjusted analyses, we initially observed positive plasma-breast correlations for leptin (r = 0.41, P = 0.0002) and adiponectin (r = 0.23, P = 0.05). The positive plasma-breast correlation for leptin was strongest among normal weight women (r = 0.62), whereas the correlation for adiponectin was strongest among obese women (r = 0.31). In multivariable models, adjusting for BMI, demographic, reproductive, and lifestyle factors, plasma leptin was not associated with breast leptin, and only the highest quartile of plasma adiponectin was associated with tissue levels. Of the risk factors investigated, those that contributed most to the variation in breast tissue adipokines were BMI and race for leptin, oral contraceptive use and smoking status for adiponectin. CONCLUSIONS Although we report positive plasma-breast adipokine correlations overall, plasma adipokine concentrations may not be good surrogates for breast concentrations among all women. Predictors of breast adipokines vary, depending on subject characteristics, possibly explaining inconsistent epidemiologic results and they implicate differing pathways toward carcinogenesis. IMPACT A clearer understanding of the relationships between plasma adipokines and their levels within the target organ is necessary to better understand the impact of these hormones on breast cancer risk. Future studies are needed to identify additional factors associated with breast adipokines in target tissues.
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Affiliation(s)
- Adana A Llanos
- Ohio State University Comprehensive Cancer Center, The Ohio State University, 300 W. 10th Avenue, Columbus, OH 43210, USA
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Tennekoon KH, Indika WL, Sugathadasa R, Karunanayake EH, Kumarasiri J, Wijesundera A. LEPR c.668A>G polymorphism in a cohort of Sri Lankan women with pre-eclampsia / pregnancy induced hypertension: a case control study. BMC Res Notes 2012; 5:308. [PMID: 22713493 PMCID: PMC3414774 DOI: 10.1186/1756-0500-5-308] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Accepted: 06/19/2012] [Indexed: 12/11/2022] Open
Abstract
Background Leptin is known to be elevated in pre-eclampsia/ pregnancy induced hypertension (PE/PIH). However the reports on the association of leptin receptor (LEPR) c.668A>G polymorphism with PE/PIH are inconsistent. Findings LEPR c.668A>G polymorphism was studied in a cohort of women with PE/PIH (N = 61) and normotensive pregnancies (N = 40) by polymerase chain reaction / restriction fragment length polymorphism. Genotype and allele frequencies were in Hardy-Weinberg equilibrium within both groups (Chi square test). Allele and genotype frequencies were not significantly different between PE/PIH and normotensive pregnancies (Chi square test). Leptin levels (Kruskal Wallis analysis of variance) and leptin/body mass index (one way analysis of variance) were not significantly different between genotypes within each group. However, leptin (Mann Whitney U test) and leptin normalised to body mass index (unpaired t test) were significantly higher in PE/PIH women homozygous and heterozygous for the G668 allele than in respective normotensives. Conclusions Whether the leptin receptor c.668A>G polymorphism increases the risk of developing PE/PIH in Sri Lankan women remains inconclusive in view of the smaller sample studied. However leptin levels in PE/PIH appeared to be modulated by this polymorphism.
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Affiliation(s)
- Kamani Hemamala Tennekoon
- Institute of Biochemistry, Molecular Biology and Biotechnology, University of Colombo, Colombo, Sri Lanka.
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Pereira TV, Mingroni-Netto RC, Yamada Y. ADRB2 and LEPR gene polymorphisms: synergistic effects on the risk of obesity in Japanese. Obesity (Silver Spring) 2011; 19:1523-7. [PMID: 21233812 DOI: 10.1038/oby.2010.322] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The objective of the present study was to validate a recently reported synergistic effect between variants located in the leptin receptor (LEPR) gene and in the β-2 adrenergic receptor (ADRB2) gene on the risk of overweight/obesity. We studied a middle-aged/elderly sample of 4,193 nondiabetic Japanese subjects stratified according gender (1,911 women and 2,282 men). The LEPR Gln223Arg (rs1137101) variant as well as both ADRB2 Arg16Gly (rs1042713) and Gln27Glu (rs1042714) polymorphisms were analyzed. The primary outcome was the risk of overweight/obesity defined as BMI ≥25 kg/m(2), whereas secondary outcomes included the risk of a BMI ≥27 kg/m(2) and BMI as a continuous variable. None of the studied polymorphisms showed statistically significant individual effects, regardless of the group or phenotype studied. Haplotype analysis also did not disclose any associations of ADRB2 polymorphisms with BMI. However, dimensionality reduction-based models confirmed significant interactions among the investigated variants for BMI as a continuous variable as well as for the risk of obesity defined as BMI ≥27 kg/m(2). All disclosed interactions were found in men only. Our results provide external validation for a male specific ADRB2-LEPR interaction effect on the risk of overweight/obesity, but indicate that effect sizes associated with these interactions may be smaller in the population studied.
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Affiliation(s)
- Tiago V Pereira
- Departamento de Genética e Biologia Evolutiva, Centro de Estudos do Genoma Humano, Instituto de Biociências, Universidade de São Paulo, São Paulo, Brazil
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Common genetic variation in adiponectin, leptin, and leptin receptor and association with breast cancer subtypes. Breast Cancer Res Treat 2011; 129:593-606. [PMID: 21516303 DOI: 10.1007/s10549-011-1517-z] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Accepted: 04/09/2011] [Indexed: 01/01/2023]
Abstract
Adipocytokines are produced by visceral fat, and levels may be associated with breast cancer risk. We investigated whether single nucleotide polymorphisms (SNPs) in adipocytokine genes adiponectin (ADIPOQ), leptin (LEP), and the leptin receptor (LEPR) were associated with basal-like or luminal A breast cancer subtypes. 104 candidate and tag SNPs were genotyped in 1776 of 2022 controls and 1972 (200 basal-like, 679 luminal A) of 2311 cases from the Carolina Breast Cancer Study (CBCS), a population-based case-control study of whites and African Americans. Breast cancer molecular subtypes were determined by immunohistochemistry. Genotype odds ratios (ORs) and 95% confidence intervals (CIs) were estimated using unconditional logistic regression. Haplotype ORs and 95% CIs were estimated using Hapstat. Interactions with waist-hip ratio were evaluated using a multiplicative interaction term. Ancestry was estimated from 144 ancestry informative markers (AIMs), and included in models to control for population stratification. Candidate SNPs LEPR K109R (rs1137100) and LEPR Q223R (rs1137101) were positively associated with luminal A breast cancer, whereas ADIPOQ +45 T/G (rs2241766), ADIPOQ +276 G/T (rs1501299), and LEPR K656N (rs8129183) were not associated with either subtype. Few patterns were observed among tag SNPs, with the exception of 3 LEPR SNPs (rs17412175, rs9436746, and rs9436748) that were in moderate LD and inversely associated with basal-like breast cancer. However, no SNP associations were statistically significant after adjustment for multiple comparisons. Haplotypes in LEP and LEPR were associated with both basal-like and luminal A subtypes. There was no evidence of interaction with waist-hip ratio. Data suggest associations between LEPR candidate SNPs and luminal A breast cancer in the CBCS and LEPR intron 2 tag SNPs and basal-like breast cancer. Replication in additional studies where breast cancer subtypes have been defined is necessary to confirm these potential associations.
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