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Zheng HT, Lou MWC, Dugué PA, Lynch BM. Circulating inflammatory markers and risk of endometrial cancer: A systematic review and meta-analysis. Cancer Epidemiol 2024; 93:102662. [PMID: 39243578 DOI: 10.1016/j.canep.2024.102662] [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: 06/07/2024] [Revised: 08/28/2024] [Accepted: 09/02/2024] [Indexed: 09/09/2024]
Abstract
Evidence suggests that inflammation may be associated with a higher risk of endometrial cancer, but previous reviews have typically examined a limited number of biomarkers. This study aimed to critically appraise the evidence on the effect of 13 circulating inflammatory biomarkers on endometrial cancer risk. MEDLINE and EMBASE databases were searched for prospective cohort, (nested) case-control and case-cohort studies, and Mendelian randomization (MR) studies published up to 31 March 2023. We performed a random-effects meta-analysis to estimate the pooled risk ratio and 95 % confidence interval (CI) for the association between each biomarker and endometrial cancer risk. Heterogeneity between studies was assessed using the I2 statistic. Eight studies were included in the meta-analysis. Comparing groups with the highest versus lowest concentration of biomarker, adiponectin levels were inversely associated with risk of endometrial cancer (risk ratio (RR) =0.75, 95 % CI: 0.57-0.99, I2: 9 %). Higher levels of CRP (RR=1.18, 95 % CI: 1.05-1.33, I2: 2 %) and TNF-α (RR=1.58, 95 % CI: 1.13-2.21, I2: 0 %) were positively associated with risk of endometrial cancer. There was suggestive evidence for a positive association was also found for IL-6 (RR=1.29, 95 % CI: 0.88-1.88, I2: 0 %) and leptin (RR=1.50, 95 % CI: 0.83-2.71, I2: 0 %). Our findings suggest that circulating inflammatory biomarkers are likely involved in the carcinogenesis of endometrial cancer. Future studies should consider prospective or MR design and measure a wider range of inflammatory markers.
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Affiliation(s)
- Haoxin Tina Zheng
- Cancer Epidemiology Division, Cancer Council Victoria, Australia; Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Australia; Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, Victoria, Australia
| | - Makayla W C Lou
- Cancer Epidemiology Division, Cancer Council Victoria, Australia; Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Australia; Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, Victoria, Australia
| | - Pierre-Antoine Dugué
- Cancer Epidemiology Division, Cancer Council Victoria, Australia; Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Australia; Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, Victoria, Australia
| | - Brigid M Lynch
- Cancer Epidemiology Division, Cancer Council Victoria, Australia; Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Australia; Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, Victoria, Australia.
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2
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Watts EL, Moore SC, Gunter MJ, Chatterjee N. Adiposity and cancer: meta-analysis, mechanisms, and future perspectives. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.02.16.24302944. [PMID: 38405761 PMCID: PMC10889047 DOI: 10.1101/2024.02.16.24302944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
Obesity is a recognised risk factor for many cancers and with rising global prevalence, has become a leading cause of cancer. Here we summarise the current evidence from both population-based epidemiologic investigations and experimental studies on the role of obesity in cancer development. This review presents a new meta-analysis using data from 40 million individuals and reports positive associations with 19 cancer types. Utilising major new data from East Asia, the meta-analysis also shows that the strength of obesity and cancer associations varies regionally, with stronger relative risks for several cancers in East Asia. This review also presents current evidence on the mechanisms linking obesity and cancer and identifies promising future research directions. These include the use of new imaging data to circumvent the methodological issues involved with body mass index and the use of omics technologies to resolve biologic mechanisms with greater precision and clarity.
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Affiliation(s)
- Eleanor L Watts
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Shady Grove, MD, USA
| | - Steven C Moore
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Shady Grove, MD, USA
| | - Marc J Gunter
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK
| | - Nilanjan Chatterjee
- Department of Biostatistics, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, USA
- Department of Oncology, School of Medicine, Johns Hopkins University, Baltimore, USA
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3
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Yan Y, Shi H, Zhao Z, Wang S, Zhou S, Mu Y, Ding N, Lai Y, Zhao AZ, Cheng L, Li F. Adiponectin Deficiency Promotes Endometrial Carcinoma Pathogenesis and Development via Activation of
Mitogen‐Activated
Protein Kinase. J Pathol 2022; 257:146-157. [PMID: 35072951 DOI: 10.1002/path.5874] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 12/06/2021] [Accepted: 01/21/2022] [Indexed: 12/24/2022]
Affiliation(s)
- Yunjing Yan
- The School of Biomedical and Pharmaceutical Sciences Guangdong University of Technology Guangzhou Guangdong Province China
| | - Hui Shi
- Department of Pathology Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine Nanjing Jiangsu Province China
| | - Zhenggang Zhao
- The School of Biomedical and Pharmaceutical Sciences Guangdong University of Technology Guangzhou Guangdong Province China
| | - Shuai Wang
- The School of Biomedical and Pharmaceutical Sciences Guangdong University of Technology Guangzhou Guangdong Province China
| | - Sujin Zhou
- The School of Biomedical and Pharmaceutical Sciences Guangdong University of Technology Guangzhou Guangdong Province China
| | - Yunping Mu
- The School of Biomedical and Pharmaceutical Sciences Guangdong University of Technology Guangzhou Guangdong Province China
| | - Ning Ding
- The School of Biomedical and Pharmaceutical Sciences Guangdong University of Technology Guangzhou Guangdong Province China
| | - Yimei Lai
- Department of Pathology First Affiliated Hospital of Gannan Medical University Ganzhou Jiangxi Province China
| | - Allan Z. Zhao
- The School of Biomedical and Pharmaceutical Sciences Guangdong University of Technology Guangzhou Guangdong Province China
| | - Lixian Cheng
- Key laboratory of Functional and Clinical Translational Medicine Xiamen Key Laboratory of Respiratory Diseases, Xiamen Medical College Xiamen Fujian Province China
| | - Fanghong Li
- The School of Biomedical and Pharmaceutical Sciences Guangdong University of Technology Guangzhou Guangdong Province China
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4
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Yasin HK, Taylor AH, Ayakannu T. A Narrative Review of the Role of Diet and Lifestyle Factors in the Development and Prevention of Endometrial Cancer. Cancers (Basel) 2021; 13:cancers13092149. [PMID: 33946913 PMCID: PMC8125712 DOI: 10.3390/cancers13092149] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 04/12/2021] [Accepted: 04/16/2021] [Indexed: 12/19/2022] Open
Abstract
Simple Summary The incidence and prevalence of endometrial cancer is increasing globally. The main factors involved in this increase have been the way women live today and what they eat and drink. In fact, the obesity pandemic that is sweeping across the planet is considered to be the main contributory feature. This review aims to introduce to a new audience, those that are not experts in the field, what is known about the different types of endometrial cancer and the mechanisms for their induction and protection. We also seek to summarise the existing knowledge on dietary and lifestyle factors that prevent endometrial development in susceptible populations and identify the main problem in this arena; the paucity of research studies and clinical trials that investigate the interaction(s) between diet, lifestyle and endometrial cancer risk whilst highlighting those areas of promise that should be further investigated. Abstract Endometrial cancer is the most common cancer affecting the reproductive organs of women living in higher-income countries. Apart from hormonal influences and genetic predisposition, obesity and metabolic syndrome are increasingly recognised as major factors in endometrial cancer risk, due to changes in lifestyle and diet, whereby high glycaemic index and lipid deposition are prevalent. This is especially true in countries where micronutrients, such as vitamins and minerals are exchanged for high calorific diets and a sedentary lifestyle. In this review, we will survey the currently known lifestyle factors, dietary requirements and hormonal changes that increase an individual’s risk for endometrial cancer and discuss their relevance for clinical management. We also examine the evidence that everyday factors and clinical interventions have on reducing that risk, such that informed healthy choices can be made. In this narrative review, we thus summarise the dietary and lifestyle factors that promote and prevent the incidence of endometrial cancer.
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Affiliation(s)
- Hajar Ku Yasin
- Department of Obstetrics & Gynaecology, Cumberland Infirmary, Carlisle CA2 7HY, UK;
| | - Anthony H. Taylor
- Department of Molecular and Cell Biology, University of Leicester, Leicester LE1 7RH, UK;
| | - Thangesweran Ayakannu
- Gynaecology Oncology Cancer Centre, Liverpool Women’s NHS Foundation Trust, Liverpool Women’s Hospital, Liverpool L8 7SS, UK
- Correspondence: ; Tel.: +44-(0)-151-708-9988 (ext. 4531)
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5
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Dimou NL, Papadimitriou N, Mariosa D, Johansson M, Brennan P, Peters U, Chanock SJ, Purdue M, Bishop DT, Gago‐Dominquez M, Giles GG, Moreno V, Platz EA, Tangen CM, Wolk A, Zheng W, Wu X, Campbell PT, Giovannucci E, Lin Y, Gunter MJ, Murphy N. Circulating adipokine concentrations and risk of five obesity-related cancers: A Mendelian randomization study. Int J Cancer 2021; 148:1625-1636. [PMID: 33038280 PMCID: PMC7894468 DOI: 10.1002/ijc.33338] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 08/27/2020] [Accepted: 09/17/2020] [Indexed: 12/20/2022]
Abstract
Obesity is considered a chronic inflammatory state characterized by continued secretion of adipokines and cytokines. Experimental and epidemiological evidence indicates that circulating adipokines may be associated with the development of obesity-related cancers, but it is unclear if these associations are causal or confounded. We examined potential causal associations of specific adipokines (adiponectin, leptin, soluble leptin receptor [sOB-R] and plasminogen activator inhibitor-1 [PAI-1]) with five obesity-related cancers (colorectal, pancreatic, renal cell carcinoma [RCC], ovarian and endometrial) using Mendelian randomization (MR) methods. We used summary-level data from large genetic consortia for 114 530 cancer cases and 245 284 controls. We constructed genetic instruments using 18 genetic variants for adiponectin, 2 for leptin and 4 for both sOB-R and PAI-1 (P value for inclusion<5 × 10-8 ). Causal estimates were obtained using two-sample MR methods. In the inverse-variance weighted models, we found an inverse association between adiponectin and risk of colorectal cancer (odds ratio per 1 μg/mL increment in adiponectin concentration: 0.90 [95% confidence interval = 0.84-0.97]; P = .01); but, evidence of horizontal pleiotropy was detected and the association was not present when this was taken into consideration. No association was found for adiponectin and risks of pancreatic cancer, RCC, ovarian cancer and endometrial cancer. Leptin, sOB-R and PAI-1 were also similarly unrelated to risk of obesity-related cancers. Despite the large sample size, our MR analyses do not support causal effects of circulating adiponectin, leptin, sOB-R and PAI-1 concentrations on the development of five obesity-related cancers.
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Affiliation(s)
- Niki L. Dimou
- Section of Nutrition and Metabolism, International Agency for Research on CancerLyonFrance
| | - Nikos Papadimitriou
- Section of Nutrition and Metabolism, International Agency for Research on CancerLyonFrance
| | - Daniela Mariosa
- Section of Genetics, International Agency for Research on CancerLyonFrance
| | - Mattias Johansson
- Section of Genetics, International Agency for Research on CancerLyonFrance
| | - Paul Brennan
- Section of Genetics, International Agency for Research on CancerLyonFrance
| | - Ulrike Peters
- Fred Hutchinson Cancer Research CenterSeattleWashingtonUSA
| | - Stephen J. Chanock
- Division of Cancer Epidemiology and Genetics, National Cancer InstituteNational Institutes of HealthBethesdaMarylandUSA
| | - Mark Purdue
- Division of Cancer Epidemiology and Genetics, National Cancer InstituteNational Institutes of HealthBethesdaMarylandUSA
| | | | - Manuela Gago‐Dominquez
- Fundación Gallega de Medicina Genómica, Grupo de Genéticadel CáncerInstituto de Investigación Sanitaria de Santiago IDISComplejo Hospitalario Univ. Santiago‐CHUS, SERGAS, Santiago de CompostelaSpain
- Moores Cancer CenterUniversity of California San DiegoLa JollaCaliforniaUSA
| | - Graham G. Giles
- Cancer Epidemiology DivisionCancer Council VictoriaMelbourneVictoriaAustralia
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global HealthThe University of MelbourneMelbourneVictoriaAustralia
- Precision MedicineSchool of Clinical Sciences at Monash Health, Monash UniversityClaytonVictoriaAustralia
| | - Victor Moreno
- Oncology Data Analytics ProgramCatalan Institute of Oncology‐IDIBELL, L'Hospitalet de LlobregatBarcelonaSpain
- CIBER Epidemiología y SaludPública (CIBERESP)MadridSpain
- Department of Clinical Sciences, Faculty of MedicineUniversity of BarcelonaBarcelonaSpain
- ONCOBEL Program, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de LlobregatBarcelonaSpain
| | - Elizabeth A. Platz
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public HealthBaltimoreMarylandUSA
| | - Catherine M. Tangen
- SWOG Statistical Center, Fred Hutchinson Cancer Research CenterSeattleWashingtonUSA
| | - Alicja Wolk
- Institute of Environmental Medicine, Karolinska InstitutetStockholmSweden
- Department of Surgical SciencesUppsala UniversityUppsalaSweden
| | - Wei Zheng
- Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt‐Ingram Cancer CenterVanderbilt UniversityNashvilleTennesseeUSA
| | - Xifeng Wu
- Department of EpidemiologyThe University of Texas MD Anderson Cancer CenterHoustonTexasUSA
- Department of Precision Health and Data Science, School of Public Health and the Second Affiliated HospitalZhejiang University School of MedicineHangzhouChina
| | - Peter T. Campbell
- Behavioral and Epidemiology Research Group, American Cancer SocietyAtlantaGeorgiaUSA
| | - Edward Giovannucci
- Department of Epidemiology, Harvard T.H. Chan School of Public HealthHarvard UniversityBostonMassachusettsUSA
- Department of NutritionT.H. Chan School of Public HealthBostonMassachusettsUSA
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical SchoolBostonMassachusettsUSA
| | - Yi Lin
- Public Health Sciences Division, Fred Hutchinson Cancer Research CenterSeattleWashingtonUSA
| | | | - Marc J. Gunter
- Section of Nutrition and Metabolism, International Agency for Research on CancerLyonFrance
| | - Neil Murphy
- Section of Nutrition and Metabolism, International Agency for Research on CancerLyonFrance
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6
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Ellis PE, Barron GA, Bermano G. Adipocytokines and their relationship to endometrial cancer risk: A systematic review and meta-analysis. Gynecol Oncol 2020; 158:507-516. [PMID: 32507648 DOI: 10.1016/j.ygyno.2020.05.033] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 05/21/2020] [Indexed: 01/10/2023]
Abstract
OBJECTIVE To investigate the association between circulating levels of adipocytokines (adiponectin, leptin, tumour necrosis factor alpha (TNFα), interleukin 6 (IL-6)) and growth factors (insulin-like growth factor I (IGF-I) and II (IGF-II)), and the risk of endometrial cancer. METHODS Cochrane, CINAHL, Embase, Medline and Web of Science were searched for English-language manuscripts published between January 2000 and August 2018 using the following string of words: cancer and endometrial and (obesity or BMI) and (adiponectin or TNF* or IGF-I or IGF-II or IL-6 or leptin). RESULTS Twenty articles were included in this meta-analysis, which corresponded to 18 studies involving 2921 endometrial carcinoma cases and 5302 controls. Fourteen articles reported circulating levels for adiponectin, seven for leptin, three for TNFα, three for IL-6 and one for IGF-I. No article reported values for IGF-II. Patients with circulating adiponectin levels in the highest tertile had decreased endometrial cancer risk compared to women with levels in the lowest tertile, (summary of odds ratio (SOR) 0.51, 95% confidence interval (CI): 0.38-0.69, p < 0.00001). Women with circulating leptin concentrations in the highest tertile had increased endometrial cancer risk compared to women with concentrations in the lowest tertile (SOR 2.19, 95% CI: 1.45-3.30, p = 0.0002). There was no difference in cancer risk between participants with the highest TNFα and IL-6 levels compared to the lowest levels (SOR 1.27, 95% CI: 0.88-1.83, p = 0.20 and SOR 1.20, 95% CI: 0.89-1.63, p = 0.23, respectively). CONCLUSIONS Endometrial cancer risk is inversely affected by adiponectin and leptin levels. There appears to be no relationship between TNFα and IL-6 and the overall risk of endometrial cancer.
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Affiliation(s)
- Patricia E Ellis
- Centre for Obesity Research and Education (CORE), School of Pharmacy and Life Sciences, Robert Gordon University, Garthdee Road, Aberdeen AB107GJ, United Kingdom of Great Britain and Northern Ireland; Royal Surrey County Hospital, Egerton Road, Guildford, Surrey GU2 7XX, United Kingdom of Great Britain and Northern Ireland
| | - Gemma A Barron
- Centre for Obesity Research and Education (CORE), School of Pharmacy and Life Sciences, Robert Gordon University, Garthdee Road, Aberdeen AB107GJ, United Kingdom of Great Britain and Northern Ireland
| | - Giovanna Bermano
- Centre for Obesity Research and Education (CORE), School of Pharmacy and Life Sciences, Robert Gordon University, Garthdee Road, Aberdeen AB107GJ, United Kingdom of Great Britain and Northern Ireland.
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7
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Atakul T, Altinkaya SO, Abas BI, Yenisey C. Serum Copper and Zinc Levels in Patients with Endometrial Cancer. Biol Trace Elem Res 2020; 195:46-54. [PMID: 31399869 DOI: 10.1007/s12011-019-01844-x] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Accepted: 07/19/2019] [Indexed: 12/29/2022]
Abstract
The aim of the present study was to evaluate serum concentrations of copper (Cu) and zinc (Zn), in relation with metabolic profile and clinicopathologic features of patients with endometrial cancer. A total of 47 women with endometrial cancer and 45 controls were eligible for the study. Clinicopathologic features and metabolic profile as well as serum copper and zinc levels were evaluated in each subject. Patients with endometrial cancer (Cu mean 3.72 ± 2.15 mg/L, median 3.54 [0.41-9.16] mg/L and Zn mean 1.83 ± 0.71 mg/L, median 1.77 [0.71-4.02] mg/L) exhibited lower Cu and Zn levels than those of controls (Cu mean 6.06 ± 1.79 mg/L, median 6.32 [2.95-9.05] mg/L and Zn mean 2.48 ± 0.89 mg/L, median 2.23 [1.23-4.54] mg/L) (p < 0.001). Cu/Zn ratio was also higher (0.85 ± 1.96 vs. 2.57 ± 0.73) in controls as compared with patients with endometrial cancer. While Cu levels showed no significant correlation with age, body mass index, gravidity, and parity, a positive correlation was found between Zn levels and parity. When cancer patients were evaluated on their own, both Cu and Zn levels showed positive correlation with age. Additionally, the cancer patients with myometrial invasion > 1/2 exhibited lower Cu levels compared with the cancer patients with myometrial invasion < 1/2. The data of the present study suggested that women with endometrial cancer are characterized by altered serum Cu and Zn levels as compared with controls. Imbalance of these trace element levels might be associated with endometrial cancer among Turkish patients.
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Affiliation(s)
- Tolga Atakul
- Department of Gynecology & Obstetrics, Faculty of Medicine, Adnan Menderes University, Aydin, Turkey
| | - S Ozlem Altinkaya
- Department of Gynecology & Obstetrics, Faculty of Medicine, Adnan Menderes University, Aydin, Turkey.
| | - Burcin Irem Abas
- Department of Biochemistry, Faculty of Medicine, Adnan Menderes University, Aydin, Turkey
| | - Cigdem Yenisey
- Department of Biochemistry, Faculty of Medicine, Adnan Menderes University, Aydin, Turkey
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8
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Gad MM, Saad AM, Al-Husseini MJ, Abdel-Gawad YM, Alsalhani OM, Alhaddad R, Mohamad B, Saleh MA, Simons-Linares CR. Temporal trends of pancreatic ductal adenocarcinoma in young adults in the United States: A Population-Based Study. Clin Res Hepatol Gastroenterol 2020; 44:204-210. [PMID: 31420297 DOI: 10.1016/j.clinre.2019.07.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 06/22/2019] [Accepted: 07/13/2019] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Pancreatic Ductal Adenocarcinoma (PDAC) is an uncommon yet fatal malignancy with numerous recent reports detailing a significant increase in the overall incidence lately. However, there is limited literature on recent incidence rates of the disease in young individuals. In this study we evaluate PDAC incidence in the US among young patients. METHODS Data from 2000 to 2017 was obtained from the Surveillance Epidemiology and End Results 'SEER' database and analyzed using the SEER*stat software. The overall incidence, incidence trends, and survival were calculated. RESULTS We selected 667 PDAC patients who met our inclusion criteria. We found the incidence of PDAC among young individuals to be 1.016 (95% CI, 0.940-1.096) per 1,000,000 person-years. Incidence rates were stable over the study period. Higher incidence was found among males [1.240 (95% CI, 1.122-1.366)] and blacks [1.226 (95% CI, 0.999-1.490)]. The 5-year relative survival of young patients with PDAC was 6.8%. CONCLUSIONS Among young adults, pancreatic cancer incidence has been stable over the study duration. However, disparities between subpopulations exist and further studies are warranted to better understand those observed differences.
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Affiliation(s)
- Mohamed M Gad
- Cleveland Clinic Foundation, Ohio 9500 Euclid Ave J2-606, 44195 Cleveland, Ohio, United States; Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States.
| | - Anas M Saad
- Cleveland Clinic Foundation, Ohio 9500 Euclid Ave J2-606, 44195 Cleveland, Ohio, United States; Faculty of Medicine, Ain Shams University, Lofty Elsayed Street, 11566 Cairo, Egypt.
| | - Muneer J Al-Husseini
- Faculty of Medicine, Ain Shams University, Lofty Elsayed Street, 11566 Cairo, Egypt
| | | | - Obai M Alsalhani
- Faculty of Medicine, Ain Shams University, Lofty Elsayed Street, 11566 Cairo, Egypt
| | | | | | - Mohannad Abou Saleh
- Cleveland Clinic Foundation, Ohio 9500 Euclid Ave J2-606, 44195 Cleveland, Ohio, United States
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9
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Kwan HY, Chao X, Su T, Fu X, Tse AKW, Fong WF, Yu ZL. The anticancer and antiobesity effects of Mediterranean diet. Crit Rev Food Sci Nutr 2017; 57:82-94. [PMID: 25831235 DOI: 10.1080/10408398.2013.852510] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Cancers have been the leading cause of death worldwide and the prevalence of obesity is also increasing in these few decades. Interestingly, there is a direct association between cancer and obesity. Each year, more than 90,000 cancer deaths are caused by obesity or overweight. The dietary pattern in Crete, referred as the traditional Mediterranean diet, is believed to confer Crete people the low mortality rates from cancers. Nevertheless, the antiobesity effect of the Mediterranean diet is less studied. Given the causal relationship between obesity and cancer, the antiobesity effect of traditional Mediterranean diet might contribute to its anticancer effects. In this regard, we will critically review the anticancer and antiobesity effects of this diet and its dietary factors. The possible mechanisms underlying these effects will also be discussed.
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Affiliation(s)
- Hiu Yee Kwan
- a Centre for Cancer and Inflammation Research, School of Chinese Medicine, Hong Kong Baptist University , Kowloon Tong , Hong Kong , China
| | - Xiaojuan Chao
- a Centre for Cancer and Inflammation Research, School of Chinese Medicine, Hong Kong Baptist University , Kowloon Tong , Hong Kong , China
| | - Tao Su
- a Centre for Cancer and Inflammation Research, School of Chinese Medicine, Hong Kong Baptist University , Kowloon Tong , Hong Kong , China
| | - Xiuqiong Fu
- a Centre for Cancer and Inflammation Research, School of Chinese Medicine, Hong Kong Baptist University , Kowloon Tong , Hong Kong , China
| | - Anfernee Kai Wing Tse
- a Centre for Cancer and Inflammation Research, School of Chinese Medicine, Hong Kong Baptist University , Kowloon Tong , Hong Kong , China
| | - Wang Fun Fong
- a Centre for Cancer and Inflammation Research, School of Chinese Medicine, Hong Kong Baptist University , Kowloon Tong , Hong Kong , China
| | - Zhi-Ling Yu
- a Centre for Cancer and Inflammation Research, School of Chinese Medicine, Hong Kong Baptist University , Kowloon Tong , Hong Kong , China
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10
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Epidemiology of Endometrial Carcinoma: Etiologic Importance of Hormonal and Metabolic Influences. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 943:3-46. [PMID: 27910063 DOI: 10.1007/978-3-319-43139-0_1] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Endometrial carcinoma is the most common gynecologic cancer in developed nations, and the annual incidence is projected to increase, secondary to the high prevalence of obesity, a strong endometrial carcinoma risk factor. Although endometrial carcinomas are etiologically, biologically, and clinically diverse, hormonal and metabolic mechanisms are particularly strongly implicated in the pathogenesis of endometrioid carcinoma, the numerically predominant subtype. The centrality of hormonal and metabolic disturbances in the pathogenesis of endometrial carcinoma, combined with its slow development from well-characterized precursors in most cases, offers a substantial opportunity to reduce endometrial carcinoma mortality through early detection, lifestyle modification, and chemoprevention. In this chapter, we review the epidemiology of endometrial carcinoma, emphasizing theories that link risk factors for these tumors to hormonal and metabolic mechanisms. Future translational research opportunities related to prevention are discussed.
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11
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Trabert B, Eldridge RC, Pfeiffer RM, Shiels MS, Kemp TJ, Guillemette C, Hartge P, Sherman ME, Brinton LA, Black A, Chaturvedi AK, Hildesheim A, Berndt SI, Safaeian M, Pinto L, Wentzensen N. Prediagnostic circulating inflammation markers and endometrial cancer risk in the prostate, lung, colorectal and ovarian cancer (PLCO) screening trial. Int J Cancer 2016; 140:600-610. [PMID: 27770434 DOI: 10.1002/ijc.30478] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 10/07/2016] [Indexed: 12/12/2022]
Abstract
Inflammation is proposed to increase risk of developing endometrial cancer, but few prospective epidemiologic studies have investigated the relationship between circulating inflammation markers and endometrial cancer risk. In a nested case-control study within the PLCO Screening Trial we measured serum levels of 64 inflammation-related biomarkers in 284 incident endometrial cancer cases and 284 matched controls. Using multivariable logistic regression inflammation markers were evaluated individually and combined into a cross-validated inflammation score. Of 64 markers, 22 were associated with endometrial cancer risk at p < 0.05 and 17 of 22 markers remained associated after multiple testing corrections. After adjusting for BMI and estradiol, SERPINE1 [quartile(Q)4 vs. Q1 odds ratio (OR) (95% confidence interval (CI)), p trend = 2.43 (0.94-6.29), 0.03] and VEGFA [2.56 (1.52-4.30), 0.0002] were positively associated with endometrial cancer risk, while CCL3 [0.46 (0.27-0.77), 0.01], IL13 [0.55 (0.33-0.93), 0.01], IL21 [0.52 (0.31-0.87), 0.01], IL1B [0.51 (0.30-0.86), 0.01] and IL23 [0.60 (0.35-1.03), 0.02] were inversely associated with risk. We observed large differences in ORs across BMI-inflammation score categories. Endometrial cancer risk was most pronounced among obese women with the highest inflammation score tertile (T) [10.25 (3.56-29.55) vs. normal BMI/T1]. Several inflammation markers were prospectively associated with endometrial cancer, including adipokines, pro- and anti-inflammatory cytokines, angiogenic factors and acute phase proteins. Inverse associations with anti-inflammatory markers (IL13, IL21), other inflammation markers/mediators (CCL3, IL1B, IL23), and a robust positive association between VEGFA and endometrial cancer risk were independent of BMI and estradiol, suggesting that these factors may influence risk through other mechanisms.
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Affiliation(s)
- Britton Trabert
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD
| | - Ronald C Eldridge
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD
| | - Ruth M Pfeiffer
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD
| | - Meredith S Shiels
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD
| | - Troy J Kemp
- HPV Immunology Laboratory, Frederick National Laboratory for Cancer Research, Leidos Biomedical Research, Inc, Frederick, MD
| | - Chantal Guillemette
- Pharmacogenomics Laboratory, Centre Hospitalier Universitaire de Québec (CHUQ) Research Center, Laval University, Faculty of Pharmacy, Québec, Canada
| | - Patricia Hartge
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD
| | - Mark E Sherman
- Division of Cancer Prevention, National Cancer Institute, Bethesda, MD
| | - Louise A Brinton
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD
| | - Amanda Black
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD
| | - Anil K Chaturvedi
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD
| | - Allan Hildesheim
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD
| | - Sonja I Berndt
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD
| | - Mahboobeh Safaeian
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD
| | - Ligia Pinto
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD
- HPV Immunology Laboratory, Frederick National Laboratory for Cancer Research, Leidos Biomedical Research, Inc, Frederick, MD
| | - Nicolas Wentzensen
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD
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12
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Huang X, Zhao J, Yang M, Li M, Zheng J. Association between FTO gene polymorphism (rs9939609 T/A) and cancer risk: a meta-analysis. Eur J Cancer Care (Engl) 2016; 26. [PMID: 26931363 DOI: 10.1111/ecc.12464] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/14/2016] [Indexed: 12/23/2022]
Abstract
Obesity is a risk factor of cancer. Several genes have been found to play an important role in aetiology of obesity and tumourigenesis. Recently, some studies suggested that rs9939609 polymorphism might be significantly associated with cancer risk, while the results of some other studies were controversial. Databases with time limitation from January 1984 to April 2015 were searched. The pooled odds ratio (OR) with 95% confidence interval was calculated to assess the associations, and subgroup meta-analyses were performed according to the type of cancer and ethnicity of the study populations. Overall, the significant association between rs9939609 polymorphism and cancer risk was found in homozygote model and recessive model. As to subgroup classified by cancer type, there was significant association in endometrial cancer and pancreatic cancer, while no statistical significance was detected in other kind of cancers. Besides, in the subgroup analysis of ethnicity, our results indicated that rs9939609 polymorphism was significantly associated with cancer risk in Asians. The rs9939609 polymorphism may be involved the susceptibility of endometrial cancer and pancreatic cancer, especially in Asian populations. Thus, rs9939609 may be a potential biomarker in early diagnosis or gene therapy target of endometrial cancer and pancreatic cancer.
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Affiliation(s)
- Xiaoyi Huang
- Department of Pathology, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Jian Zhao
- Department of Orthopaedics, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Mingyuan Yang
- Department of Orthopaedics, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Ming Li
- Department of Orthopaedics, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Jianming Zheng
- Department of Pathology, Changhai Hospital, Second Military Medical University, Shanghai, China
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13
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Nimptsch K, Pischon T. Obesity Biomarkers, Metabolism and Risk of Cancer: An Epidemiological Perspective. Recent Results Cancer Res 2016; 208:199-217. [PMID: 27909909 DOI: 10.1007/978-3-319-42542-9_11] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Obesity is associated with metabolic alterations that may pose a biological link between body fatness and risk of cancer. Elucidating the role of obesity-related biomarkers in cancer development is essential for developing targeted strategies aiming at obesity-associated cancer prevention. Molecular epidemiological studies of the past decades have provided evidence that major hormonal pathways linking obesity and cancer risk include the insulin and insulin-like growth factor-1 (IGF-1) axis, sex-steroid hormones, adipokines and chronic low-grade inflammation. These pathways are interrelated with each other, and their importance varies by obesity-related cancer type. The insulin/IGF-1 axis has been implicated to play an important mediating role in the association between obesity and risk of pancreatic, colorectal and prostate cancer. Endogenous sex-steroid hormone concentrations, in particular obesity-associated pre-diagnostic elevations of estrogens and androgens, play an important role in postmenopausal breast cancer and endometrial cancer development. The adipokines adiponectin and leptin and adipocyte-mediated chronic low-grade inflammation represented by the acute-phase C-reactive protein may explain a substantial part of the association between obesity and risk of colorectal cancer. There is less evidence on whether these hormonal pathways play a mediating role in other obesity-associated types of cancer. In this chapter, the molecular epidemiologic evidence from prospective studies relating circulating obesity-related biomarkers to cancer risk is summarized, taking into account available evidence from Mendelian Randomization investigations aiming at improving causal inference.
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Affiliation(s)
- Katharina Nimptsch
- Molecular Epidemiology Research Group, Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Robert-Rössle-Straße 10, 13125, Berlin, Germany.
| | - Tobias Pischon
- Molecular Epidemiology Research Group, Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Robert-Rössle-Straße 10, 13125, Berlin, Germany
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Lin T, Zhao X, Kong WM. Association between adiponectin levels and endometrial carcinoma risk: evidence from a dose-response meta-analysis. BMJ Open 2015; 5:e008541. [PMID: 26338840 PMCID: PMC4563269 DOI: 10.1136/bmjopen-2015-008541] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
OBJECTIVES Epidemiological studies evaluating the association between adiponectin levels and endometrial carcinoma risk have produced inconsistent results. Thus, a meta-analysis was conducted to assess the association between them. METHODS Pertinent studies were identified by a search of PubMed and Web of Knowledge through January of 2015. A random-effects model was used to combine the data for analysis. Dose-response relationship was assessed by restricted cubic spline and variance-weighted least squares regression analysis. RESULTS Twelve articles (5 prospective studies and 7 case-control studies) involving 1916 endometrial carcinoma cases were included in this meta-analysis. Pooled results suggested that highest adiponectin levels versus lowest levels were significantly associated with the risk of endometrial carcinoma (summary relative risk (RR)=0.525, 95% CI 0.388 to 0.712, I(2)=64.2%). The association was also found in postmenopausal women (summary RR=0.646, 95% CI 0.433 to 0.964), but not in premenopausal women. A linear dose-response relationship was found, with the risk of endometrial carcinoma decreasing by 3% for every 1 μg/mL increase in adiponectin levels (summary RR=0.97, 95% CI 0.96 to 0.98). No publication bias was found. CONCLUSIONS Our analysis suggested that the higher adiponectin levels might have a protective effect against endometrial carcinoma, especially in postmenopausal women.
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Affiliation(s)
- Tong Lin
- Department of Obstetrics and Gynecology, East Hospital of Beijing University of Traditional Chinese Medicine, Beijing, China
| | - Xin Zhao
- Department of Obstetrics and Gynecology, East Hospital of Beijing University of Traditional Chinese Medicine, Beijing, China
| | - Wei-min Kong
- Department of Gynecological Oncology, Beijing Maternity Hospital, Beijing, China
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15
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Yang X, Li J, Cai W, Yang Q, Lu Z, Yu J, Yu H, Zhang N, Sun D, Qu Y, Guo H, Wen F, Ji Y. Adiponectin Gene Polymorphisms are Associated with Increased Risk of Colorectal Cancer. Med Sci Monit 2015; 21:2595-606. [PMID: 26329379 PMCID: PMC4562615 DOI: 10.12659/msm.893472] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Background This meta-analysis investigates the associations of adiponectin (ADIPOQ) genetic polymorphisms with the susceptibility to colorectal cancer (CRC). Material/Methods 2 reviewers independently searched 6 databases – PubMed, Cochrane Library, Ovid, Embase, China National Knowledge Infrastructure (CNKI) and Wanfang databases – to identify published studies relevant to adiponectin gene polymorphisms and CRC. Studies retrieved from database searches were screened using our stringent inclusion and exclusion criteria. Full texts of the selected studies were accessed and related data was extracted using a standardized data extraction form. Comprehensive Meta-analysis 2.0 software was used for statistical analyses. Results A total of 188 studies were initially retrieved from database search, and 6 studies were eventually selected, through a rigorous screening process, for inclusion in this meta-analysis. The 6 studies contained a total of 1897 patients (Asians: 1190; white: 707) with CRC in case group and 2475 healthy controls (Asians: 1325; white: 1150) in the control group. Results of the current meta-analysis revealed that the rs2241766 T>G single-nucleotide polymorphisms (SNP) increase the risk of CRC; rs1501299 G>T under dominant model was associated with increased risk of CRC; and rs266729 C>G SNP under allele model conferred an increased risk of CRC. Conclusions Our meta-analysis strongly suggests that the ADIPOQ rs2241766 T>G, rs1501299 G>T, and rs266729 C>G SNPs correlate with an increased risk of CRC.
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Affiliation(s)
- Xiaoyu Yang
- Department of Pathology, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Xinxiang, China (mainland)
| | - Jinsong Li
- Department of Pathology, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Xinxiang, China (mainland)
| | - Weimei Cai
- Department of Oncology, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Xinxiang, China (mainland)
| | - Qinghui Yang
- Department of Oncology, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Xinxiang, China (mainland)
| | - Zhihong Lu
- Department of Oncology, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Xinxiang, China (mainland)
| | - Jian Yu
- Department of Pathology, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Xinxiang, China (mainland)
| | - Hong Yu
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China (mainland)
| | - Na Zhang
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China (mainland)
| | - Deyu Sun
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China (mainland)
| | - Yanli Qu
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China (mainland)
| | - Hong Guo
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China (mainland)
| | - Fengyun Wen
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China (mainland)
| | - Yinghua Ji
- Department of Oncology, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Xinxiang, China (mainland)
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Lin QJ, Yang F, Jin C, Fu DL. Current status and progress of pancreatic cancer in China. World J Gastroenterol 2015; 21:7988-8003. [PMID: 26185370 PMCID: PMC4499341 DOI: 10.3748/wjg.v21.i26.7988] [Citation(s) in RCA: 201] [Impact Index Per Article: 22.3] [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] [Revised: 03/31/2015] [Accepted: 04/17/2015] [Indexed: 02/06/2023] Open
Abstract
Cancer is currently one of the most important public health problems in the world. Pancreatic cancer is a fatal disease with poor prognosis. As in most other countries, the health burden of pancreatic cancer in China is increasing, with annual mortality rates almost equal to incidence rates. The increasing trend of pancreatic cancer incidence is more significant in the rural areas than in the urban areas. Annual diagnoses and deaths of pancreatic cancer in China are now beyond the number of cases in the United States. GLOBOCAN 2012 estimates that cases in China account for 19.45% (65727/337872) of all newly diagnosed pancreatic cancer and 19.27% (63662/330391) of all deaths from pancreatic cancer worldwide. The population’s growing socioeconomic status contributes to the rapid increase of China’s proportional contribution to global rates. Here, we present an overview of control programs for pancreatic cancer in China focusing on prevention, early diagnosis and treatment. In addition, we describe key epidemiological, demographic, and socioeconomic differences between China and developed countries. Facts including no nationwide screening program for pancreatic cancer, delay in early detection resulting in a late stage at presentation, lack of awareness of pancreatic cancer in the Chinese population, and low investment compared with other cancer types by government have led to backwardness in China’s pancreatic cancer diagnosis and treatment. Finally, we suggest measures to improve health outcomes of pancreatic cancer patients in China.
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17
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Zheng Q, Wu H, Cao J. Circulating adiponectin and risk of endometrial cancer. PLoS One 2015; 10:e0129824. [PMID: 26030130 PMCID: PMC4452093 DOI: 10.1371/journal.pone.0129824] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Accepted: 05/13/2015] [Indexed: 12/15/2022] Open
Abstract
Background Adiponectin is an insulin-sensitizing hormone produced by adipocytes. It has been suggested to be involved in endometrial tumorigenesis. Published data have shown inconsistent results for the association between circulating adiponectin levels and endometrial cancer. In this study, we conducted a meta-analysis to evaluate the predictive value of circulating adiponectin levels on the development of endometrial cancer. Methods PubMed, Embase, ISI web of knowledge, and Cochrane databases were searched for all eligible studies, and the summary relative risk (SRR) was calculated. Additionally, we performed dose-response analysis with eight eligible studies. Results A total of 1,955 cases and 3,458 controls from 12 studies were included. The SRR for the ‘highest’ vs ‘lowest’ adiponectin levels indicated high adiponectin level reduced the risk of endometrial cancer [SRR = 0.40, 95% confidence interval (CI), 0.33–0.66]. Results from the subgroup analyses were consistent with the overall analysis. The SRR for each 1 µg/ml increase of adiponectin indicated a 3% reduction in endometrial cancer risk (95% CI: 2%–4%), and a 14% reduction for each increase of 5 µg/ml (95% CI: 9%–19%). No evidence of publication bias was found. Conclusions This meta-analysis demonstrates that low level of circulating adiponectin is a risk factor for endometrial cancer.
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Affiliation(s)
- Qiaoli Zheng
- Clinical Research Center, The Second Affiliated Hospital, School of Medicine, Zhejiang University, 88 Jiefang Road, Hangzhou, Zhejiang Province, China
- Department of Dermatology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, 3 Qingchun Road East, Hangzhou, Zhejiang Province, China
| | - Haijian Wu
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, 88 Jiefang Road, Hangzhou, Zhejiang Province, China
| | - Jiang Cao
- Clinical Research Center, The Second Affiliated Hospital, School of Medicine, Zhejiang University, 88 Jiefang Road, Hangzhou, Zhejiang Province, China
- * E-mail:
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18
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Gong TT, Wu QJ, Wang YL, Ma XX. Circulating adiponectin, leptin and adiponectin-leptin ratio and endometrial cancer risk: Evidence from a meta-analysis of epidemiologic studies. Int J Cancer 2015; 137:1967-78. [PMID: 25899043 DOI: 10.1002/ijc.29561] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2015] [Accepted: 04/02/2015] [Indexed: 12/15/2022]
Affiliation(s)
- Ting-Ting Gong
- Department of Obstetrics and Gynecology; Shengjing Hospital of China Medical University; Shenyang Liaoning People's Republic of China
| | - Qi-Jun Wu
- Division of Clinical Epidemiology; Shengjing Hospital of China Medical University; Shenyang Liaoning People's Republic of China
| | - Yong-Lai Wang
- Department of Obstetrics and Gynecology; Shengjing Hospital of China Medical University; Shenyang Liaoning People's Republic of China
| | - Xiao-Xin Ma
- Department of Obstetrics and Gynecology; Shengjing Hospital of China Medical University; Shenyang Liaoning People's Republic of China
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Adiponectin mediates antiproliferative and apoptotic responses in endometrial carcinoma by the AdipoRs/AMPK pathway. Gynecol Oncol 2015; 137:311-20. [PMID: 25703675 DOI: 10.1016/j.ygyno.2015.02.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Accepted: 02/09/2015] [Indexed: 01/21/2023]
Abstract
OBJECTIVE Determine the serum adiponectin levels in endometrial carcinoma (EC) cases and controls and explore the correlation between them. We assessed the functions of AdipoR1 and AdipoR2 in endometrial cancer cells to determine whether the AMPK/ERK and Akt pathways mediate the effects of adiponectin-induced apoptosis and anti-proliferation. MATERIAL AND METHODS The serum adiponectin levels were measured via enzyme-linked immunosorbent assay (ELISA). The proliferation and apoptosis rates were determined with MTT and annexin V/PI assays. To evaluate the activation of AMPK, ERK, and Akt and the expression of Bcl-2 and Cyclin D1, western blot analysis was performed in Ishikawa 3-H-12 cells. We down-regulated AdipoRs by si-RNA to assess their functions. RESULTS The serum adiponectin levels were significantly decreased in patients with EC compared to controls. The adiponectin-induced apoptosis and anti-proliferation effects in EC cells were blocked by Compound C. Ishikawa 3-H-12 cells exhibited time- and dose-dependent increases in the p-AMPK levels after treatment with adiponectin. Adiponectin treatment reduced the levels of ERK and Akt phosphorylations and cyclin D1 and Bcl-2 mRNA and protein expression. Compound C blocked the effects on ERK, Akt, cyclin D1, and Bcl-2. AdipoR1 and AdipoR2 were involved in adiponectin-induced growth inhibition and ERK activation inhibition. We speculated that AdipoR1 has a greater role than adipoR2 in apoptosis and Akt activation inhibition after adiponectin treatment. CONCLUSION Adiponectin was an apoptotic and anti-proliferation agent for EC cells, and these effects were dependent on the AMPK/ERK and Akt pathways. AdipoR1 and AdipoR2 may play different roles in this process.
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21
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Altinkaya SO, Nergiz S, Küçük M, Yüksel H. Apelin levels are higher in obese patients with endometrial cancer. J Obstet Gynaecol Res 2014; 41:294-300. [DOI: 10.1111/jog.12503] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Accepted: 05/26/2014] [Indexed: 11/26/2022]
Affiliation(s)
- S. Ozlem Altinkaya
- Department of Gynecology and Obstetrics; Faculty of Medicine; Adnan Menderes University; Aydin Turkey
| | - Sümeyra Nergiz
- Department of Gynecology and Obstetrics; Faculty of Medicine; Adnan Menderes University; Aydin Turkey
| | - Mert Küçük
- Department of Gynecology and Obstetrics; Faculty of Medicine; Sitki Koçman University; Muğla Turkey
| | - Hasan Yüksel
- Department of Gynecology and Obstetrics; Faculty of Medicine; Adnan Menderes University; Aydin Turkey
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22
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Ma Y, Liu Z, Zhang Y, Lu B. Serum leptin, adiponectin and endometrial cancer risk in Chinese women. J Gynecol Oncol 2013; 24:336-41. [PMID: 24167669 PMCID: PMC3805914 DOI: 10.3802/jgo.2013.24.4.336] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 06/09/2013] [Accepted: 06/25/2013] [Indexed: 01/29/2023] Open
Abstract
Objective To investigate the relationship between serum concentrations of leptin or adiponectin, and endometrial carcinoma in Chinese women. Methods We conducted a case-control study of a total of 516 Chinese women to detect the relationships between serum concentrations of leptin or adiponectin, and endometrial carcinoma in Chinese women. The study subject constituted 206 cases of endometrial cancer and 310 normal controls. Results Patients with endometrial carcinoma had higher serum leptin concentrations than controls (28.8±2.2 ug/L vs. 19.8±1.4 ug/L; p<0.001). The adiponectin levels in patients were lower than in controls with borderline statistical significance (2,330.7±180.5 ug/L vs. 2,583.9±147.2 ug/L; p=0.078). Logistic regression analysis confirmed the associations between leptin or adiponectin, and endometrial carcinoma after adjustment for age, body mass index, fasting insulin, serum glucose, cholesterol, triglycerides, and high-density lipoprotein cholesterol (odds ratio for the top tertile vs. the bottom tertile: leptin 2.05; 95% confidence interval [CI], 1.28 to 3.29; p<0.001; adiponectin 0.52; 95% CI, 0.32 to 0.83; p<0.001). Conclusion Increased leptin or decreased adiponectin levels are associated with endometrial carcinoma.
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Affiliation(s)
- Yu Ma
- Department of Clinical Laboratory, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China
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23
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Luhn P, Dallal CM, Weiss JM, Black A, Huang WY, Lacey JV, Hayes RB, Stanczyk FZ, Wentzensen N, Brinton LA. Circulating adipokine levels and endometrial cancer risk in the prostate, lung, colorectal, and ovarian cancer screening trial. Cancer Epidemiol Biomarkers Prev 2013; 22:1304-12. [PMID: 23696194 PMCID: PMC3819202 DOI: 10.1158/1055-9965.epi-13-0258] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Circulating adipokine levels may be associated with endometrial cancer risk, yet few studies have evaluated these markers prospectively. METHODS We conducted a nested case-control study of postmenopausal women in the Prostate, Lung, Colorectal and Ovarian Cancer Screening Trial (n = 78,216), including 167 incident endometrial cancer cases and 327 controls that were matched on age, study center, race, study year of diagnosis, year of blood draw, time of day of blood draw, and menopausal hormone therapy (MHT) use. Adipokine and estradiol levels were categorized into tertiles (T). ORs and 95% confidence intervals (CIs) for the associations of adiponectin, leptin, and visfatin with endometrial cancer risk were estimated by conditional logistic regression, adjusting for known endometrial cancer risk factors, including body mass index (BMI) and circulating estradiol levels. RESULTS Adiponectin levels were inversely associated with risk of endometrial cancer [ORT3vsT1 = 0.48; 95% CI, 0.29-0.80); Ptrend < 0.01], whereas elevated leptin levels showed a positive association [2.77 (1.60-4.79); Ptrend < 0.01]. These results remained significant after adjustment for estradiol, but not after further adjustment for BMI. When analyses were restricted to non-MHT users, associations of adiponectin and leptin were stronger and remained significant after adjustment for estradiol and BMI [0.25 (0.08-0.75); Ptrend = 0.01 and 4.72 (1.15-19.38); Ptrend = 0.02, respectively]. Nonsignificant positive associations were observed for visfatin. CONCLUSION Adipokines may influence endometrial cancer risk through pathways other than estrogen-mediated cell growth in postmenopausal women not currently on MHT. IMPACT Understanding how adipokines influence endometrial cancer risk may help to elucidate biological mechanisms important for the observed obesity-endometrial cancer association.
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Affiliation(s)
- Patricia Luhn
- Division of Cancer Epidemiology and Genetics, Division of Cancer Prevention, National Cancer Institute, Rockville, MD 20892, USA.
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Dallal CM, Brinton LA, Bauer DC, Buist DSM, Cauley JA, Hue TF, Lacroix A, Tice JA, Chia VM, Falk R, Pfeiffer R, Pollak M, Veenstra TD, Xu X, Lacey JV. Obesity-related hormones and endometrial cancer among postmenopausal women: a nested case-control study within the B~FIT cohort. Endocr Relat Cancer 2013; 20:151-60. [PMID: 23222000 PMCID: PMC4038326 DOI: 10.1530/erc-12-0229] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Endometrial cancer risk is strongly influenced by obesity, but the mechanisms of action remain unclear. Leptin and adiponectin, secreted from adipose tissue, reportedly play a role in such carcinogenic processes as cell proliferation, angiogenesis, and insulin regulation. In this case-control study, nested within the Breast and Bone Follow-up of the Fracture Intervention Trial (n=15,595), we assessed pre-diagnostic serum leptin, total adiponectin, and high-molecular-weight (HMW) adiponectin in relation to endometrial cancer among postmenopausal women. During the 10-year follow-up, 62 incident endometrial cases were identified and matched to 124 controls on age, geographical site, time of fasting blood draw at baseline (1992-1993), and trial participation status. Adipokines and C-peptide were measured by ELISA. Odds ratios (ORs) and 95% confidence intervals (95% CIs) were estimated via conditional logistic regression, with exposures categorized in tertiles (T). Multivariable models considered C-peptide, BMI (kg/m(2)), and estradiol (E2) as potential confounders. Endometrial cancer risk was significantly associated with higher leptin levels, adjusted for E2 and C-peptide (OR(T3 vs T1)=2.96; 95% CI, 1.21-7.25; P trend <0.01). After further adjustment for BMI, the estimates were attenuated and the positive trend was no longer statistically significant (OR(T3 vs T1)=2.11; 95% CI, 0.69-6.44; P trend=0.18). No significant associations were observed with adiponectin or HMW adiponectin and endometrial cancer. Our findings with leptin suggest that the leptin-BMI axis might increase endometrial cancer risk through mechanisms other than estrogen-driven proliferation. Continued exploration of these pathways in larger prospective studies may help elucidate mechanisms underlying observed obesity-endometrial cancer associations.
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Affiliation(s)
- Cher M Dallal
- Hormonal and Reproductive Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, 6120 Executive Boulevard, Bethesda, Maryland 20852, USA.
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25
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Davoodi SH, Malek-Shahabi T, Malekshahi-Moghadam A, Shahbazi R, Esmaeili S. Obesity as an important risk factor for certain types of cancer. IRANIAN JOURNAL OF CANCER PREVENTION 2013; 6:186-94. [PMID: 25250133 PMCID: PMC4142931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Accepted: 09/28/2013] [Indexed: 11/10/2022]
Abstract
Cancer could be described as the uncontrolled and unrestricted growth of malignant cells in any place of the body. It is a multifactorial disease which either heredity or environmental factors (such as nutrition, physical inactivity, alcohol, obesity, exposure to sun, environmental pollutants, infections) chip in incidence of cancer. In recent years, several researchers have focused on obesity as a potent cancer risk factor. Scientificevidences have suggested that obesity has associated with increased risk for a plenty of different types of cancer. The evidences are the most consistent for endometrial cancer, breast cancer between the postmenopausal women, and renal cell cancer. More contradictoryresults have reported about the colorectal, prostate, and pancreatic cancer. Although numerous studies have done according to the obesity and cancer relation or joint, but the molecular mechanisms in which obesity could increase the risks of cancer, have been poorly understood.
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Affiliation(s)
- Sayed Hossain Davoodi
- Dept. of Clinical Nutrition and Dietetics, National Nutrition and Food Technology Research Institute, Faculty of Nutrition Sciences, Food Science and Technology, Shahid Beheshti University of Medical Sciences,Tehran, Iran
| | | | | | - Roghieh Shahbazi
- Dept. of Clinical Nutrition and Dietetics, National Nutrition and Food Technology Research Institute, Faculty of Nutrition Sciences, Food Science and Technology, Shahid Beheshti University of Medical Sciences,Tehran, Iran
| | - Saeideh Esmaeili
- Dept. of Food Technology Research, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran,Corresponding Author: Saeideh Esmaeili, MSc
Tel: (+98) 21 22 96 91 77
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26
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Angelidis G, Dafopoulos K, Messini CI, Valotassiou V, Tsikouras P, Vrachnis N, Psimadas D, Georgoulias P, Messinis IE. The Emerging Roles of Adiponectin in Female Reproductive System-Associated Disorders and Pregnancy. Reprod Sci 2012; 20:872-81. [DOI: 10.1177/1933719112468954] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- George Angelidis
- Department of Nuclear Medicine, Medical School, University of Thessalia, Larissa, Greece
| | - Konstantinos Dafopoulos
- Department of Obstetrics and Gynecology, Medical School, University of Thessalia, Larissa, Greece
| | - Christina I. Messini
- Department of Obstetrics and Gynecology, Medical School, University of Thessalia, Larissa, Greece
| | - Varvara Valotassiou
- Department of Nuclear Medicine, Medical School, University of Thessalia, Larissa, Greece
| | - Panagiotis Tsikouras
- Department of Obstetrics and Gynecology, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
| | - Nikolaos Vrachnis
- Department of Obstetrics and Gynecology, Medical School, National and Kapodestrian University of Athens, Athens, Greece
| | - Dimitrios Psimadas
- Department of Nuclear Medicine, Medical School, University of Thessalia, Larissa, Greece
| | - Panagiotis Georgoulias
- Department of Nuclear Medicine, Medical School, University of Thessalia, Larissa, Greece
| | - Ioannis E. Messinis
- Department of Obstetrics and Gynecology, Medical School, University of Thessalia, Larissa, Greece
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27
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Friedenreich CM, Langley AR, Speidel TP, Lau DCW, Courneya KS, Csizmadi I, Magliocco AM, Yasui Y, Cook LS. Case-control study of markers of insulin resistance and endometrial cancer risk. Endocr Relat Cancer 2012; 19:785-92. [PMID: 23033315 PMCID: PMC3493985 DOI: 10.1530/erc-12-0211] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Markers of insulin resistance such as the adiponectin:leptin ratio (A:L) and the homeostasis model assessment ratio (HOMA-IR) are associated with obesity and hyperinsulinemia, both established risk factors for endometrial cancer, and may therefore be informative regarding endometrial cancer risk. This study investigated the association between endometrial cancer risk and markers of insulin resistance, namely adiponectin, leptin, the A:L ratio, insulin, fasting glucose, and the HOMA-IR. We analyzed data from 541 incident endometrial cancer cases and 961 frequency age-matched controls in a population-based case-control study in Alberta, Canada from 2002 to 2006. Participants completed interview-administered questionnaires were assessed for anthropometric measures, and provided 8-h fasting blood samples either pre- or postoperatively. Blood was analyzed for concentrations of leptin, adiponectin, and insulin by immunoassay, and fasting plasma glucose levels were determined by fluorimetric quantitative determination. Compared with the lowest quartile, the highest quartile of insulin and HOMA-IR was associated with 64% (95% confidence intervals (CI): 1.12-2.40) and 72% (95% CI: 1.17-2.53) increased risks of endometrial cancer, respectively, and the highest quartile of adiponectin was associated with a 45% (95% CI: 0.37-0.80) decreased risk after multivariable adjustments. Null associations were observed between fasting glucose, leptin and A:L, and endometrial cancer risk. This population-based study provides evidence for a role of insulin resistance in endometrial cancer etiology and may provide one possible pathway whereby obesity increases the risk of this common cancer. Interventions aimed at decreasing both obesity and insulin resistance may decrease endometrial cancer risk.
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Affiliation(s)
- Christine M Friedenreich
- Division of Cancer Care, Alberta Health Services, Department of Population Health Research, Calgary, Canada.
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28
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Gaudet MM, Falk RT, Stevens RD, Gunter MJ, Bain JR, Pfeiffer RM, Potischman N, Lissowska J, Peplonska B, Brinton LA, Garcia-Closas M, Newgard CB, Sherman ME. Analysis of serum metabolic profiles in women with endometrial cancer and controls in a population-based case-control study. J Clin Endocrinol Metab 2012; 97:3216-23. [PMID: 22730518 PMCID: PMC3431573 DOI: 10.1210/jc.2012-1490] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
CONTEXT Endometrial cancer is associated with metabolic disturbances related to its underlying risk factors, including obesity and diabetes. Identifying metabolite biomarkers associated with endometrial cancer may have value for early detection, risk assessment, and understanding etiology. OBJECTIVE The objective of the study was to evaluate the reliable measurement of metabolites in epidemiological studies with nonstandardized blood collection; confirm previously reported correlations of metabolites with body size; and assess differences in metabolite levels between cases and controls. DESIGN This was the Polish Endometrial Cancer Study (2001-2003). SETTING This study was a population-based case-control study. PATIENTS Patients included 250 cases and 250 controls. INTERVENTION The intervention included the measurement of serum metabolite levels of 15 amino acids, 45 acylcarnitines, and nine fatty acids. MAIN OUTCOME MEASURE The main outcome measure was endometrial cancer. RESULTS Body mass index was correlated with levels of valine (r = 0.26, P = 3.4 × 10(-5)), octenoylcarnitine (r = 0.24, P = 1.5 × 10(-4)), palmitic acid (r = 0.26, P = 4.4 × 10(-5)), oleic acid (r = 0.28, P = 9.9 × 10(-6)), and stearic acid (r = 0.26, P = 2.9 × 10(-5)) among controls. Only stearic acid was inversely associated with endometrial cancer case status (quartile 4 vs. quartile 1: odds ratio 0.37, 95% confidence interval 0.20-0.69, P for trend = 1.2 × 10(-4)). Levels of the C5-acylcarnitines, octenoylcarnitine, decatrienoylcarnitine, and linoleic acid were significantly lower in cases than controls (odds ratios ranged from 0.21 to 0.38). CONCLUSIONS These data demonstrate that previously reported variations in metabolomic profiles with body mass index can be replicated in population-based studies with nonfasting blood collection protocols. We also provide preliminary evidence that large differences in metabolite levels exist between cases and controls, independent of body habitus. Our findings warrant assessment of metabolic profiles, including the candidate markers identified herein, in prospectively collected blood samples to define biomarkers and etiological factors related to endometrial cancer.
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Affiliation(s)
- Mia M Gaudet
- Epidemiology Research Program, American Cancer Society, 250 Williams Street, Atlanta, Georgia 30316, USA.
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Dalamaga M, Diakopoulos KN, Mantzoros CS. The role of adiponectin in cancer: a review of current evidence. Endocr Rev 2012; 33:547-94. [PMID: 22547160 PMCID: PMC3410224 DOI: 10.1210/er.2011-1015] [Citation(s) in RCA: 441] [Impact Index Per Article: 36.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Excess body weight is associated not only with an increased risk of type 2 diabetes and cardiovascular disease (CVD) but also with various types of malignancies. Adiponectin, the most abundant protein secreted by adipose tissue, exhibits insulin-sensitizing, antiinflammatory, antiatherogenic, proapoptotic, and antiproliferative properties. Circulating adiponectin levels, which are determined predominantly by genetic factors, diet, physical activity, and abdominal adiposity, are decreased in patients with diabetes, CVD, and several obesity-associated cancers. Also, adiponectin levels are inversely associated with the risk of developing diabetes, CVD, and several malignancies later in life. Many cancer cell lines express adiponectin receptors, and adiponectin in vitro limits cell proliferation and induces apoptosis. Recent in vitro studies demonstrate the antiangiogenic and tumor growth-limiting properties of adiponectin. Studies in both animals and humans have investigated adiponectin and adiponectin receptor regulation and expression in several cancers. Current evidence supports a role of adiponectin as a novel risk factor and potential diagnostic and prognostic biomarker in cancer. In addition, either adiponectin per se or medications that increase adiponectin levels or up-regulate signaling pathways downstream of adiponectin may prove to be useful anticancer agents. This review presents the role of adiponectin in carcinogenesis and cancer progression and examines the pathophysiological mechanisms that underlie the association between adiponectin and malignancy in the context of a dysfunctional adipose tissue in obesity. Understanding of these mechanisms may be important for the development of preventive and therapeutic strategies against obesity-associated malignancies.
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Affiliation(s)
- Maria Dalamaga
- Laboratory of Clinical Biochemistry, Attikon General University Hospital, University of Athens, School of Medicine, 12462 Athens, Greece
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Abstract
The increasing incidence of obesity and its co-morbid conditions poses a great challenge to global health. In addition to cardiovascular disease and diabetes, epidemiological data demonstrate a link between obesity and multiple types of cancer. The molecular mechanisms underlying how obesity causes an increased risk of cancer are poorly understood. Obesity disrupts the dynamic role of the adipocyte in energy homeostasis, resulting in inflammation and alteration of adipokine (for example, leptin and adiponectin) signalling. Additionally, obesity causes secondary changes that are related to insulin signalling and lipid deregulation that may also foster cancer development. Understanding these molecular links may provide an avenue for preventive and therapeutic strategies to reduce cancer risk and mortality in an increasingly obese population.
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Affiliation(s)
- Melin J Khandekar
- Dana-Farber Cancer Institute and Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, USA
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31
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Combined use of a solid-phase hexapeptide ligand library with liquid chromatography and two-dimensional difference gel electrophoresis for intact plasma proteomics. INTERNATIONAL JOURNAL OF PROTEOMICS 2011; 2011:739615. [PMID: 22389768 PMCID: PMC3282153 DOI: 10.1155/2011/739615] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Accepted: 06/09/2011] [Indexed: 02/06/2023]
Abstract
The intact plasma proteome is of great interest in biomarker studies because intact proteins reflect posttranslational protein processing such as phosphorylation that may correspond to disease status. We examined the utility of a solid-phase hexapeptide ligand library in combination with conventional plasma proteomics modalities for comprehensive profiling of intact plasma proteins. Plasma proteins were sequentially fractionated using depletion columns for albumin and immunoglobulin, and separated using an anion-exchange column. Proteins in each fraction were treated with a solid-phase hexapeptide ligand library and compared to those without treatment. Two-dimensional difference gel electrophoresis demonstrated an increased number of protein spots in the treated samples. Mass spectrometric studies of these protein spots with unique intensity in the treated samples resulted in the identification of high- and medium-abundance proteins. Our results demonstrated the possible utility of a solid-phase hexapeptide ligand library to reveal greater number of intact plasma proteins. The characteristics of proteins with unique affinity to the library remain to be clarified by more extensive mass spectrometric protein identification, and optimized protocols should be established for large-scale plasma biomarker studies.
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