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Halloran KM, Saadat N, Pallas B, Vyas AK, Sargis R, Padmanabhan V. Developmental programming: Testosterone excess masculinizes female pancreatic transcriptome and function in sheep. Mol Cell Endocrinol 2024; 588:112234. [PMID: 38588858 PMCID: PMC11231987 DOI: 10.1016/j.mce.2024.112234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 03/25/2024] [Accepted: 04/03/2024] [Indexed: 04/10/2024]
Abstract
Hyperandrogenic disorders, such as polycystic ovary syndrome, are often associated with metabolic disruptions such as insulin resistance and hyperinsulinemia. Studies in sheep, a precocial model of translational relevance, provide evidence that in utero exposure to excess testosterone during days 30-90 of gestation (the sexually dimorphic window where males naturally experience elevated androgens) programs insulin resistance and hyperinsulinemia in female offspring. Extending earlier findings that adverse effects of testosterone excess are evident in fetal day 90 pancreas, the end of testosterone treatment, the present study provides evidence that transcriptomic and phenotypic effects of in utero testosterone excess on female pancreas persist after cessation of treatment, suggesting lasting organizational changes, and induce a male-like phenotype in female pancreas. These findings demonstrate that the female pancreas is susceptible to programmed masculinization during the sexually dimorphic window of fetal development and shed light on underlying connections between hyperandrogenism and metabolic homeostasis.
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Affiliation(s)
| | - Nadia Saadat
- Department of Pediatrics, University of Michigan, Ann Arbor, MI, USA
| | - Brooke Pallas
- Unit Lab Animal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Arpita K Vyas
- Department of Pediatrics, Washington University, St. Louis, MO, USA
| | - Robert Sargis
- Department of Medicine, University of Illinois, Chicago, IL, USA
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2
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Pan C, Yu T, Zhao H, He J, Lu X, Tang H, Hong Y, Shang C, Wu Q, Yang A, Li C, Zhou M, Shi Y. Evaluation of pancreatic iodine uptake and related influential factors in multiphase dual-energy CT. Eur Radiol 2024:10.1007/s00330-024-10850-0. [PMID: 38913243 DOI: 10.1007/s00330-024-10850-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 04/25/2024] [Accepted: 06/03/2024] [Indexed: 06/25/2024]
Abstract
OBJECTIVES To establish normative values and identify potential factors influencing pancreatic iodine uptake using dual-energy CT (DECT). MATERIALS AND METHODS This retrospective study included participants without pancreatic diseases undergoing DECT at two institutions with different platforms. Their protocols both included arterial phase (AP), portal venous phase (PP), and equilibrium phase (EP), defined as 35 s-40 s, 60 s-70 s, and 150 s-180 s after injection of contrast agent, respectively. Both iodine concentration (IC) and normalised IC (NIC) were measured. Demographic features, local measurements of the pancreas and visceral fat area (VFA) were considered as potential factors influencing iodine uptake using multivariate linear regression analyses. RESULTS A total of 562 participants (median age 58 years [interquartile range: 47-67], with 282 men) were evaluated. The mean IC differed significantly between two institutions (all p < 0.001) across three contrast-enhanced phases, while the mean NIC showed no significant differences (all p > 0.05). The mean values of NIC were 0.22 at AP, 0.43 at PP and 0.45 at EP. NICAP was independently affected by VFA (β = 0.362, p < 0.001), smoking (β = -0.240, p = 0.001), and type-II diabetes (β = -0.449, p < 0.001); NICPP by VFA (β = -0.301, p = 0.017) and smoking (β = -0.291, p < 0.001); and NICEP by smoking (β = -0.154, p = 0.10) and alcohol consumption (β = -0.350, p < 0.001) with statistical power values over 0.81. CONCLUSION NIC values were consistent across institutions. Abdominal obesity, smoking, alcohol consumption, and diabetes are independent factors influencing pancreatic iodine uptake. CLINICAL RELEVANCE STATEMENT This study has provided reference normative values, influential factors and effective normalisation methods of pancreatic iodine uptake in multiphase dual-energy CT for future studies in this area as a new biological marker. KEY POINTS Evaluation of pancreatic iodine uptake measured by dual-energy CT is a promising method for future studies. Abdominal obesity, smoking, alcohol consumption, diabetes, and sex are independent factors influencing pancreatic iodine uptake. Utility of normalised iodine concentration is necessary to ensure the consistency across different institutions.
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Affiliation(s)
- Chen Pan
- Department of Radiology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Tao Yu
- Department of Radiology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Heng Zhao
- Department of Radiology, The First Affiliated Hospital of University of South China, Hengyang, China
| | - Jiani He
- Department of Radiology, The First Affiliated Hospital of University of South China, Hengyang, China
| | - Xiaomei Lu
- CT Clinical Science CT, Philips Healthcare, Shenyang, China
| | - Haiyan Tang
- Department of Radiology, The First Affiliated Hospital of University of South China, Hengyang, China
| | - Yang Hong
- Department of Neurosurgery, Shengjing Hospital, China Medical University, Shenyang, China
| | - Chao Shang
- Department of Neurobiology, School of Life Sciences, China Medical University, Shenyang, China
| | - Qijun Wu
- Department of Clinical Epidemiology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Aoran Yang
- Department of Radiology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Chunli Li
- Department of Radiology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Minghui Zhou
- Department of Radiology, Shengjing Hospital of China Medical University, Shenyang, China.
| | - Yu Shi
- Department of Radiology, Shengjing Hospital of China Medical University, Shenyang, China.
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MacCalman A, De Franco E, Franklin A, Flaxman CS, Richardson SJ, Murrall K, Burrage J, Walker EM, Morgan NG, Hattersley AT, Dempster EL, Hannon E, Jeffries AR, Owens NDL, Mill J. Developmentally dynamic changes in DNA methylation in the human pancreas. BMC Genomics 2024; 25:553. [PMID: 38831310 PMCID: PMC11145889 DOI: 10.1186/s12864-024-10450-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 05/24/2024] [Indexed: 06/05/2024] Open
Abstract
Development of the human pancreas requires the precise temporal control of gene expression via epigenetic mechanisms and the binding of key transcription factors. We quantified genome-wide patterns of DNA methylation in human fetal pancreatic samples from donors aged 6 to 21 post-conception weeks. We found dramatic changes in DNA methylation across pancreas development, with > 21% of sites characterized as developmental differentially methylated positions (dDMPs) including many annotated to genes associated with monogenic diabetes. An analysis of DNA methylation in postnatal pancreas tissue showed that the dramatic temporal changes in DNA methylation occurring in the developing pancreas are largely limited to the prenatal period. Significant differences in DNA methylation were observed between males and females at a number of autosomal sites, with a small proportion of sites showing sex-specific DNA methylation trajectories across pancreas development. Pancreas dDMPs were not distributed equally across the genome and were depleted in regulatory domains characterized by open chromatin and the binding of known pancreatic development transcription factors. Finally, we compared our pancreas dDMPs to previous findings from the human brain, identifying evidence for tissue-specific developmental changes in DNA methylation. This study represents the first systematic exploration of DNA methylation patterns during human fetal pancreas development and confirms the prenatal period as a time of major epigenomic plasticity.
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Affiliation(s)
- Ailsa MacCalman
- Department of Clinical and Biomedical Sciences, Faculty of Health and Life Sciences, University of Exeter, RILD Building, Royal Devon & Exeter Hospital, Barrack Rd, Exeter, EX2 5DW, UK
| | - Elisa De Franco
- Department of Clinical and Biomedical Sciences, Faculty of Health and Life Sciences, University of Exeter, RILD Building, Royal Devon & Exeter Hospital, Barrack Rd, Exeter, EX2 5DW, UK
| | - Alice Franklin
- Department of Clinical and Biomedical Sciences, Faculty of Health and Life Sciences, University of Exeter, RILD Building, Royal Devon & Exeter Hospital, Barrack Rd, Exeter, EX2 5DW, UK
| | - Christine S Flaxman
- Department of Clinical and Biomedical Sciences, Faculty of Health and Life Sciences, University of Exeter, RILD Building, Royal Devon & Exeter Hospital, Barrack Rd, Exeter, EX2 5DW, UK
| | - Sarah J Richardson
- Department of Clinical and Biomedical Sciences, Faculty of Health and Life Sciences, University of Exeter, RILD Building, Royal Devon & Exeter Hospital, Barrack Rd, Exeter, EX2 5DW, UK
| | - Kathryn Murrall
- Department of Clinical and Biomedical Sciences, Faculty of Health and Life Sciences, University of Exeter, RILD Building, Royal Devon & Exeter Hospital, Barrack Rd, Exeter, EX2 5DW, UK
| | - Joe Burrage
- Department of Clinical and Biomedical Sciences, Faculty of Health and Life Sciences, University of Exeter, RILD Building, Royal Devon & Exeter Hospital, Barrack Rd, Exeter, EX2 5DW, UK
| | - Emma M Walker
- Department of Clinical and Biomedical Sciences, Faculty of Health and Life Sciences, University of Exeter, RILD Building, Royal Devon & Exeter Hospital, Barrack Rd, Exeter, EX2 5DW, UK
| | - Noel G Morgan
- Department of Clinical and Biomedical Sciences, Faculty of Health and Life Sciences, University of Exeter, RILD Building, Royal Devon & Exeter Hospital, Barrack Rd, Exeter, EX2 5DW, UK
| | - Andrew T Hattersley
- Department of Clinical and Biomedical Sciences, Faculty of Health and Life Sciences, University of Exeter, RILD Building, Royal Devon & Exeter Hospital, Barrack Rd, Exeter, EX2 5DW, UK
| | - Emma L Dempster
- Department of Clinical and Biomedical Sciences, Faculty of Health and Life Sciences, University of Exeter, RILD Building, Royal Devon & Exeter Hospital, Barrack Rd, Exeter, EX2 5DW, UK
| | - Eilis Hannon
- Department of Clinical and Biomedical Sciences, Faculty of Health and Life Sciences, University of Exeter, RILD Building, Royal Devon & Exeter Hospital, Barrack Rd, Exeter, EX2 5DW, UK
| | - Aaron R Jeffries
- Department of Biosciences, Faculty of Health and Life Sciences, University of Exeter, Exeter, UK
| | - Nick D L Owens
- Department of Clinical and Biomedical Sciences, Faculty of Health and Life Sciences, University of Exeter, RILD Building, Royal Devon & Exeter Hospital, Barrack Rd, Exeter, EX2 5DW, UK
| | - Jonathan Mill
- Department of Clinical and Biomedical Sciences, Faculty of Health and Life Sciences, University of Exeter, RILD Building, Royal Devon & Exeter Hospital, Barrack Rd, Exeter, EX2 5DW, UK.
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Ma Y, Zhang L, Wei R, Dai W, Zeng R, Luo D, Jiang R, Zhuo Z, Yang Q, Li J, Leung FW, Duan C, Sha W, Chen H. Risks of digestive diseases in long COVID: evidence from a population-based cohort study. BMC Med 2024; 22:14. [PMID: 38195495 PMCID: PMC10777515 DOI: 10.1186/s12916-023-03236-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 12/19/2023] [Indexed: 01/11/2024] Open
Abstract
BACKGROUND In the post-pandemic era, a wide range of COVID-19 sequelae is of growing health concern. However, the risks of digestive diseases in long COVID have not been comprehensively understood. To investigate the long-term risk of digestive diseases among COVID patients. METHODS In this large-scale retrospective cohort study with up to 2.6 years follow-up (median follow-up: 0.7 years), the COVID-19 group (n = 112,311), the contemporary comparison group (n = 359,671) and the historical comparison group (n = 370,979) predated the COVID-19 outbreak were built using UK Biobank database. Each digestive outcome was defined as the diagnosis 30 days or more after the onset of COVID-19 infection or the index date. Hazard ratios (HRs) and corresponding 95% confidence intervals (CI) were computed utilizing the Cox regression models after inverse probability weighting. RESULTS Compared with the contemporary comparison group, patients with previous COVID-19 infection had higher risks of digestive diseases, including gastrointestinal (GI) dysfunction (HR 1.38 (95% CI 1.26 to 1.51)); peptic ulcer disease (HR 1.23 (1.00 to 1.52)); gastroesophageal reflux disease (GERD) (HR 1.41 (1.30 to 1.53)); gallbladder disease (HR 1.21 (1.06 to 1.38)); severe liver disease (HR 1.35 (1.03 to 1.76)); non-alcoholic liver disease (HR 1.27 (1.09 to 1.47)); and pancreatic disease (HR 1.36 (1.11 to 1.66)). The risks of GERD were increased stepwise with the severity of the acute phase of COVID-19 infection. Even after 1-year follow-up, GERD (HR 1.64 (1.30 to 2.07)) and GI dysfunction (HR 1.35 (1.04 to 1.75)) continued to pose risks to COVID-19 patients. Compared to those with one SARS-CoV-2 infection, reinfected patients were at a higher risk of pancreatic diseases (HR 2.57 (1.23 to 5.38)). The results were consistent when the historical cohort was used as the comparison group. CONCLUSIONS Our study provides insights into the association between COVID-19 and the long-term risk of digestive system disorders. COVID-19 patients are at a higher risk of developing digestive diseases. The risks exhibited a stepwise escalation with the severity of COVID-19, were noted in cases of reinfection, and persisted even after 1-year follow-up. This highlights the need to understand the varying risks of digestive outcomes in COVID-19 patients over time, particularly those who experienced reinfection, and develop appropriate follow-up strategies.
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Affiliation(s)
- Yuying Ma
- Department of Gastroenterology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Lijun Zhang
- Department of Gastroenterology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China
- School of Medicine, South China University of Technology, Guangzhou, 510006, China
| | - Rui Wei
- Department of Gastroenterology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China
| | - Weiyu Dai
- Department of Gastroenterology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China
| | - Ruijie Zeng
- Department of Gastroenterology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China
- Shantou University Medical College, Shantou, 515000, Guangdong, China
| | - Dongling Luo
- Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Guangdong Cardiovascular Institute, Southern Medical University, Guangzhou, 510080, China
| | - Rui Jiang
- Department of Gastroenterology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China
- School of Medicine, South China University of Technology, Guangzhou, 510006, China
| | - Zewei Zhuo
- Department of Gastroenterology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China
| | - Qi Yang
- Department of Gastroenterology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China
| | - Jingwei Li
- Department of Gastroenterology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Felix W Leung
- David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, 90024, USA.
- Sepulveda Ambulatory Care Center, Veterans Affairs Greater Los Angeles Healthcare System, North Hills, CA, 91343, USA.
| | - Chongyang Duan
- Department of Biostatistics, School of Public Health, Southern Medical University, Guangzhou, 510515, China.
| | - Weihong Sha
- Department of Gastroenterology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China.
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, 510515, China.
- School of Medicine, South China University of Technology, Guangzhou, 510006, China.
- Shantou University Medical College, Shantou, 515000, Guangdong, China.
| | - Hao Chen
- Department of Gastroenterology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China.
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, 510515, China.
- School of Medicine, South China University of Technology, Guangzhou, 510006, China.
- Shantou University Medical College, Shantou, 515000, Guangdong, China.
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5
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Janssen QP, Quispel R, Besselink MG, Bonsing BA, Bruno MJ, Doukas M, Sarasqueta AF, Homs MYV, van Hooft JE, van Tienhoven G, van Velthuysen MLF, Verheij J, Voermans RP, Wilmink JW, Groot Koerkamp B, van Eijck CHJ, van Driel LMJW. Diagnostic performance of endoscopic tissue acquisition for pancreatic ductal adenocarcinoma in the PREOPANC and PREOPANC-2 trials. HPB (Oxford) 2023; 25:1161-1168. [PMID: 37211461 DOI: 10.1016/j.hpb.2023.04.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 02/07/2023] [Accepted: 04/30/2023] [Indexed: 05/23/2023]
Abstract
BACKGROUND Neoadjuvant treatment for pancreatic ductal adenocarcinoma (PDAC) has increased, necessitating histopathologic confirmation of cancer. This study evaluates the performance of endoscopic tissue acquisition (TA) procedures for borderline resectable and resectable PDAC. METHODS Pathology reports of patients included in two nationwide randomized controlled trials (PREOPANC and PREOPANC-2) were reviewed. The primary outcome was sensitivity for malignancy (SFM), considering both "suspicious for" and "malignant" as positive. Secondary outcomes were rate of adequate sampling (RAS) and diagnoses other than PDAC. RESULTS Overall, 892 endoscopic procedures were performed in 617 patients, including endoscopic ultrasonography (EUS)-guided TA in 550 (89.1%), endoscopic retrograde cholangiopancreatography (ERCP)-guided brush cytology in 188 (30.5%), and periampullary biopsies in 61 patients (9.9%). The SFM was 85.2% for EUS, 88.2% for repeat EUS, 52.7% for ERCP, and 37.7% for periampullary biopsies. The RAS ranged 94-100%. Diagnoses other than PDAC were other periampullary cancers in 24 (5.4%), premalignant disease in five (1.1%), and pancreatitis in three patients (0.7%). CONCLUSIONS EUS-guided TA of patients with borderline resectable and resectable PDAC included in RCTs had an SFM above 85% for both first and repeat procedures, meeting international standards. Two percent had false positive result for malignancy and 5% had other (non-PDAC) periampullary cancers.
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Affiliation(s)
- Quisette P Janssen
- Department of Surgery, Erasmus MC Cancer Institute, Rotterdam, the Netherlands.
| | - Rutger Quispel
- Department of Gastroenterology, Reinier de Graaf Group, Delft, the Netherlands
| | - Marc G Besselink
- Department of Surgery, Amsterdam UMC, University of Amsterdam, Cancer Center Amsterdam, Amsterdam, the Netherlands
| | - Bert A Bonsing
- Department of Surgery, Leiden University Medical Center, Leiden, the Netherlands
| | - Marco J Bruno
- Department of Gastroenterology and Hepatology, Erasmus MC Cancer Institute, Rotterdam, the Netherlands
| | - Michael Doukas
- Department of Pathology, Erasmus MC Cancer Institute, Rotterdam, the Netherlands
| | - Arantza F Sarasqueta
- Department of Pathology, Amsterdam UMC, University of Amsterdam, Cancer Center Amsterdam, Amsterdam, the Netherlands
| | - Marjolein Y V Homs
- Department of Medical Oncology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Jeanin E van Hooft
- Department of Gastroenterology and Hepatology Leiden University Medical Center, Leiden, the Netherlands
| | - Geertjan van Tienhoven
- Department of Radiation Oncology, Amsterdam UMC, University of Amsterdam, Cancer Center Amsterdam, Amsterdam, the Netherlands
| | | | - Joanne Verheij
- Department of Pathology, Amsterdam UMC, University of Amsterdam, Cancer Center Amsterdam, Amsterdam, the Netherlands
| | - Rogier P Voermans
- Department of Gastroenterology and Hepatology, Amsterdam UMC, University of Amsterdam, Amsterdam Gastroenterology and Metabolism, Amsterdam, the Netherlands
| | - Johanna W Wilmink
- Department of Medical Oncology, Amsterdam UMC, University of Amsterdam, Cancer Center Amsterdam, Amsterdam, the Netherlands
| | - Bas Groot Koerkamp
- Department of Surgery, Erasmus MC Cancer Institute, Rotterdam, the Netherlands
| | | | - Lydi M J W van Driel
- Department of Gastroenterology and Hepatology, Erasmus MC Cancer Institute, Rotterdam, the Netherlands.
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Boonhat H, Pratama AP, Lin JT, Lin RT. Duration-response association between occupational exposure and pancreatic cancer risk: meta-analysis. Occup Med (Lond) 2023; 73:211-218. [PMID: 37101416 PMCID: PMC10195200 DOI: 10.1093/occmed/kqad050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2023] Open
Abstract
BACKGROUND Evidence is lacking on the occupational exposure time window to chemical agents related to pancreatic cancer risk. AIMS This study performed meta-regression and meta-analysis to examine the dose-response association between occupational exposure duration to chemical agents and pancreatic cancer risk. METHODS We searched and reviewed studies on exposure duration and pancreatic cancer in five databases (Cochrane Library, EMBASE, PubMed, ScienceDirect and Web of Science) from inception to 16 May 2022. Exposure refers to the years a worker was exposed to any chemical agent, and outcome variables were pancreatic cancer incidence and mortality. RESULTS We identified 31 studies, including 288 389 participants. In the meta-regression, the positive dose-response association indicated pancreatic cancer risk increased slightly with every additional year of exposure duration (slope = 1.01; 95% confidence interval [CI] 1.00-1.02). Pancreatic cancer risk increased with an exposure duration of 1-10 (relative risk [RR] = 1.04; 95% CI 1.02-1.06), 11-20 (RR = 1.11; 95% CI 1.05-1.16), and 21-30 years (RR = 1.39; 95% CI 1.12-1.73). CONCLUSIONS Pancreatic cancer risk increased as occupational exposure duration increased, with an exposure time window ranging from 1 to 30 years.
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Affiliation(s)
- H Boonhat
- Graduate Institute of Public Health, College of Public Health, China Medical University, Taichung 406040, Taiwan
| | - A P Pratama
- Graduate Institute of Public Health, College of Public Health, China Medical University, Taichung 406040, Taiwan
| | - J-T Lin
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, E-Da Hospital, Kaohsiung 824, Taiwan
| | - R-T Lin
- Department of Occupational Safety and Health, College of Public Health, China Medical University, Taichung 406040, Taiwan
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7
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Srinivasan MP, Bhopale KK, Caracheo AA, Kaphalia L, Popov VL, Boor PJ, Kaphalia BS. Dysregulated pancreatic lipid phenotype, inflammation and cellular injury in a chronic ethanol feeding model of hepatic alcohol dehydrogenase-deficient deer mice. Life Sci 2023; 322:121670. [PMID: 37030615 DOI: 10.1016/j.lfs.2023.121670] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 03/24/2023] [Accepted: 04/03/2023] [Indexed: 04/08/2023]
Abstract
AIMS Dysregulation of pancreatic fat and lipotoxic inflammation are common clinical findings in alcoholic chronic pancreatitis (ACP). In this study, we investigated a relationship between dysregulated pancreatic lipid metabolism and the development of injury in a chronic ethanol (EtOH) feeding model of hepatic alcohol dehydrogenase 1- deficient (ADH-) deer mice. METHODS ADH- and hepatic ADH normal (ADH+) deer mice were fed a liquid diet containing 3 % EtOH for three months and received a single gavage of binge EtOH with/without fatty acid ethyl esters (FAEEs) one week before the euthanasia. Plasma and pancreatic tissue were analyzed for lipids including FAEEs, inflammatory markers and adipokines using GC-MS, bioassays/kits, and immunostaining, respectively. Pancreatic morphology and proteins involved in lipogenesis were determined by the H & E staining, electron microscopy and Western blot analysis. KEY FINDINGS Chronic EtOH feeding in ADH- vs. ADH+ deer mice resulted in a significant increase in the levels of pancreatic lipids including FAEEs, adipokines (leptin and resistin), fat infiltration with inflammatory cells and lipid droplet deposition along with the proteins involved in lipogenesis. These changes were exacerbated by an administration of binge EtOH with/without FAEEs in the pancreas of ADH- vs. ADH+ deer mice fed chronic EtOH suggest a metabolic basis for ACP. SIGNIFICANCE These findings suggest that the liver-pancreatic axis plays a crucial role in etiopathogenesis of ACP, as the increased body burden of EtOH due to hepatic ADH deficiency exacerbates pancreatic injury.
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8
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Möller K, Jenssen C, Braden B, Hocke M, Hollerbach S, Ignee A, Faiss S, Iglesias-Garcia J, Sun S, Dong Y, Carrara S, Dietrich CF. Pancreatic changes with lifestyle and age: What is normal and what is concerning? Endosc Ultrasound 2023; 12:213-227. [PMID: 37148135 PMCID: PMC10237602 DOI: 10.4103/eus-d-22-00162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 01/03/2023] [Indexed: 05/07/2023] Open
Abstract
During the aging process, typical morphological changes occur in the pancreas, which leads to a specific "patchy lobular fibrosis in the elderly." The aging process in the pancreas is associated with changes in volume, dimensions, contour, and increasing intrapancreatic fat deposition. Typical changes are seen in ultrasonography, computed tomography, endosonography, and magnetic resonance imaging. Typical age-related changes must be distinguished from lifestyle-related changes. Obesity, high body mass index, and metabolic syndrome also lead to fatty infiltration of the pancreas. In the present article, age-related changes in morphology and imaging are discussed. Particular attention is given to the sonographic verification of fatty infiltration of the pancreas. Ultrasonography is a widely used screening examination method. It is important to acknowledge the features of the normal aging processes and not to interpret them as pathological findings. Reference is made to the uneven fatty infiltration of the pancreas. The differential diagnostic and the differentiation from other processes and diseases leading to fatty infiltration of the pancreas are discussed.
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Affiliation(s)
- Kathleen Möller
- Medical Department I/Gastroenterology, Sana Hospital Lichtenberg, Berlin, Germany
| | - Christian Jenssen
- Department of Internal Medicine, Krankenhaus Maerkisch-Oderland, D-15344 Strausberg, Germany
- Brandenburg Institute of Clinical Medicine at Medical University Brandenburg, Neuruppin, Germany
| | - Barbara Braden
- Translational Gastroenterology Unit, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Michael Hocke
- Medical Department II, Helios Klinikum Meiningen, Meiningen, Germany
| | - Stephan Hollerbach
- Department of Medicine and Gastroenterology, Allgemeines Krankenhaus, Celle, Germany
| | - André Ignee
- Department of Medical Gastroenterology, Julius-Spital Würzburg, Germany
| | - Siegbert Faiss
- Medical Department I/Gastroenterology, Sana Hospital Lichtenberg, Berlin, Germany
| | - Julio Iglesias-Garcia
- Department of Gastroenterology and Hepatology, Health Research Institute of Santiago de Compostela (IDIS), University Hospital of Santiago de Compostela, Santiago de Compostela, Spain
| | - Siyu Sun
- Department of Endoscopy Center, Shengjing Hospital of China Medical University, Liaoning Province, China
| | - Yi Dong
- Department of Ultrasound, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Siliva Carrara
- Digestive Endoscopy Unit, Division of Gastroenterology, Humanitas Clinical and Research Center IRCCS, Rozzano, Italy
| | - Christoph F. Dietrich
- Department of Allgemeine Innere Medizin, Kliniken Hirslanden, Beau Site, Salem und Permanence, Bern, Switzerland
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9
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Bhargava A. Unraveling corticotropin-releasing factor family-orchestrated signaling and function in both sexes. VITAMINS AND HORMONES 2023; 123:27-65. [PMID: 37717988 DOI: 10.1016/bs.vh.2023.01.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Stress responses to physical, psychological, environmental, or cellular stressors, has two arms: initiation and recovery. Corticotropin-releasing factor (CRF) is primarily responsible for regulating and/or initiating stress responses via, whereas urocortins (UCNs) are involved in the recovery response to stress via feedback inhibition. Stress is a loaded, polysemous word and is experienced in a myriad of ways. Some stressors are good for an individual, in fact essential, whereas other stressors are associated with bad outcomes. Perceived stress, like beauty, lies in the eye of the beholder, and hence the same stressor can result in individual-specific outcomes. In mammals, there are two main biological sexes with reproduction as primary function. Reproduction and nutrition can also be viewed as stressors; based on a body of work from my laboratory, we propose that the functions of all other organs have co-evolved to optimize and facilitate an individual's nutritional and reproductive functions. Hence, sex differences in physiologically relevant outcomes are innate and occur at all levels- molecular, endocrine, immune, and (patho)physiological. CRF and three UCNs are peptide hormones that mediate their physiological effects by binding to two known G protein-coupled receptors (GPCRs), CRF1 and CRF2. Expression and function of CRF family of hormones and their receptors is likely to be sexually dimorphic in all organs. In this chapter, based on the large body of work from others and my laboratory, an overview of the CRF family with special emphasis on sex-specific actions of peripherally expressed CRF2 receptor in health and disease is provided.
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Affiliation(s)
- Aditi Bhargava
- Center for Reproductive Sciences, Department of Obstetrics and Gynecology, University of California San Francisco, San Francisco, CA, United States.
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10
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Gheorghe G, Ionescu VA, Moldovan H, Diaconu CC. Clinical and Biological Data in Patients with Pancreatic Cancer vs. Chronic Pancreatitis-A Single Center Comparative Analysis. Diagnostics (Basel) 2023; 13:369. [PMID: 36766475 PMCID: PMC9914010 DOI: 10.3390/diagnostics13030369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/15/2023] [Accepted: 01/17/2023] [Indexed: 01/21/2023] Open
Abstract
INTRODUCTION In some patients with chronic pancreatitis, the diagnosis of pancreatic cancer can be missed. The objective of the study was to identify clinical and paraclinical data with statistical significance in the differential diagnosis between chronic pancreatitis and pancreatic cancer. MATERIALS AND METHODS We conducted a retrospective, observational study on a cohort of 120 patients hospitalized over 3 years. The patients were equally distributed in two groups: group A, with 60 patients with pancreatic cancer, and group B, with 60 patients with chronic pancreatitis. The statistical analysis was carried out by using the R program. RESULTS The comparative analysis of pancreatic cancer vs. chronic pancreatitis revealed a stronger link between pancreatic cancer, female gender (p = 0.001) and age over 60 years (p < 0.001). Patients with pancreatic cancer had higher serum values of aspartate aminotransferase (p 0.005), alanine aminotransferase (p 0.006), total bilirubin (p < 0.001), direct bilirubin (p < 0.001), alkaline phosphatase (p 0.030), C-reactive protein (p = 0.049) and uric acid (p 0.001), while patients with chronic pancreatitis presented slightly higher values of amylase (p 0.020) and lipase (p 0.029). CONCLUSIONS Female gender, advanced age, elevated aminotransferases, cholestasis markers and uric acid were associated with a higher probability of pancreatic cancer.
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Affiliation(s)
- Gina Gheorghe
- Faculty of Medicine, University of Medicine and Pharmacy Carol Davila Bucharest, 050474 Bucharest, Romania
- Gastroenterology Department, Clinical Emergency Hospital of Bucharest, 105402 Bucharest, Romania
| | - Vlad Alexandru Ionescu
- Faculty of Medicine, University of Medicine and Pharmacy Carol Davila Bucharest, 050474 Bucharest, Romania
- Gastroenterology Department, Clinical Emergency Hospital of Bucharest, 105402 Bucharest, Romania
| | - Horatiu Moldovan
- Faculty of Medicine, University of Medicine and Pharmacy Carol Davila Bucharest, 050474 Bucharest, Romania
- Department of Cardiovascular Surgery, Clinical Emergency Hospital of Bucharest, 105402 Bucharest, Romania
- Medical Sciences Section, Academy of Romanian Scientists, 050085 Bucharest, Romania
| | - Camelia Cristina Diaconu
- Faculty of Medicine, University of Medicine and Pharmacy Carol Davila Bucharest, 050474 Bucharest, Romania
- Medical Sciences Section, Academy of Romanian Scientists, 050085 Bucharest, Romania
- Internal Medicine Department, Clinical Emergency Hospital of Bucharest, 105402 Bucharest, Romania
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11
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Chen L, Zhang X, Liu Y, Liu L, Liang X, Yang S, Xia Q, Jin T, Ma Y, Chen Y, Yuan X, Tie Y, Gu Y, Fang C, Chen S, Mo F, Yu T, Hu Y, Qian Z, Peng Y, Geng J, Zhou Z, Wu M, Ding J, Yang D, Wei X. JMJD3 Is Required for Acute Pancreatitis and Pancreatitis-Associated Lung Injury. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2023; 210:180-190. [PMID: 36458991 PMCID: PMC9772398 DOI: 10.4049/jimmunol.2200484] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 11/01/2022] [Indexed: 01/04/2023]
Abstract
Acute pancreatitis (AP) can be complicated by inflammatory disorders of remote organs, such as lung injury, in which Jumonji domain-containing protein 3 (JMJD3) plays a vital role in proinflammatory responses. Currently, we found that JMJD3 expression was upregulated in the pancreas and lung in an AP male mouse model, which was also confirmed in AP patients. Further experiments revealed that the upregulation of JMJD3 and proinflammatory effects were possibly exerted by mitochondrial DNA (mtDNA) or oxidized-mtDNA from tissue injury caused by AP. The release of mtDNA and oxidized-mtDNA contributed to the infiltration of inflammatory monocytes in lung injury through the stimulator of IFN genes (STING)/TLR9-NF-κB-JMJD3-TNF-α pathway. The inhibition of JMJD3 or utilization of Jmjd3-cKO mice significantly alleviated pulmonary inflammation induced by AP. Blocking mtDNA oxidation or knocking down the TLR9/STING pathway effectively alleviated inflammation. Therefore, inhibition of JMJD3 or STING/TLR9 pathway blockage might be a potential therapeutic strategy to treat AP and the associated lung injury.
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Affiliation(s)
- Li Chen
- Laboratory of Aging Research and Nanotoxicology, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Xiangxian Zhang
- Laboratory of Aging Research and Nanotoxicology, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Yu Liu
- Laboratory of Aging Research and Nanotoxicology, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Li Liu
- Laboratory of Aging Research and Nanotoxicology, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Xiao Liang
- Laboratory of Aging Research and Nanotoxicology, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Shengqun Yang
- Laboratory of Aging Research and Nanotoxicology, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Qing Xia
- Department of Integrated Traditional Chinese and Western Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Tao Jin
- Department of Integrated Traditional Chinese and Western Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Yun Ma
- Department of Integrated Traditional Chinese and Western Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Yonghua Chen
- Department of Pancreatic Surgery/Pancreatic Disease Center, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Xia Yuan
- Laboratory of Aging Research and Nanotoxicology, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Yan Tie
- Laboratory of Aging Research and Nanotoxicology, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Yangzhuo Gu
- Laboratory of Aging Research and Nanotoxicology, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Chunju Fang
- Laboratory of Aging Research and Nanotoxicology, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Siyuan Chen
- Laboratory of Aging Research and Nanotoxicology, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Fei Mo
- Laboratory of Aging Research and Nanotoxicology, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Ting Yu
- Laboratory of Aging Research and Nanotoxicology, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Yuzhu Hu
- Laboratory of Aging Research and Nanotoxicology, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Zhiyong Qian
- Laboratory of Aging Research and Nanotoxicology, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Yong Peng
- Laboratory of Aging Research and Nanotoxicology, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Jia Geng
- Laboratory of Aging Research and Nanotoxicology, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Zongguang Zhou
- Department of Gastrointestinal Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
| | - Min Wu
- Department of Biochemistry and Molecular Biology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND; and
| | - Jiansheng Ding
- Department of Radiotherapy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Daoke Yang
- Department of Radiotherapy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xiawei Wei
- Laboratory of Aging Research and Nanotoxicology, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, People’s Republic of China
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Ramezankhani R, Ghavidel AA, Rashidi S, Rojhannezhad M, Abolkheir HR, Mirhosseini M, Taleahmad S, Vosough M. Gender-related differentially expressed genes in pancreatic cancer: possible culprits or accomplices? Front Genet 2022; 13:966941. [DOI: 10.3389/fgene.2022.966941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Accepted: 10/10/2022] [Indexed: 11/13/2022] Open
Abstract
Pancreatic cancer (PC) is one of the leading causes of cancer mortality worldwide, and its incidence and mortality rate in several regions is higher in male patients. Although numerous efforts have been made to enhance the clinical outcomes of existing therapeutic regimens, their efficiency is still low, and drug resistance usually occurs in many patients. In addition, the exact underlying molecular basis that makes PC slightly more prevalent among males remains unknown. Providing information regarding the possible association between gender and PC tumorigenesis may offer important clues for how certain molecular cross-talks can affect PC initiation and/or progression. In this study, we used several microarray expression data to identify the common up- and downregulated genes within one specific gender, which were also specified to have binding sites for androgen and/or estrogen receptors. Using functional enrichment analysis among the others, for all the gene sets found in this study, we have shed light on the plausible importance of the androgenic effectors in tumorigenesis, such as the androgen-regulated expression of the GLI transcription factor and the potential role of testosterone in the extracellular matrix (ECM)–cell interaction, which are known for their importance in tumorigenesis. Moreover, we demonstrated that the biological process axon guidance was highlighted regarding the upregulated genes in male patients. Overall, identification of gene candidates as the possible link between gender and PC progression or survival rates may help in developing strategies to reduce the incidence of this cancer.
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13
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Singh V, Park YJ, Lee G, Unno T, Shin JH. Dietary regulations for microbiota dysbiosis among post-menopausal women with type 2 diabetes. Crit Rev Food Sci Nutr 2022; 63:9961-9976. [PMID: 35635755 DOI: 10.1080/10408398.2022.2076651] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Type 2 diabetes (T2D) and T2D-associated comorbidities, such as obesity, are serious universally prevalent health issues among post-menopausal women. Menopause is an unavoidable condition characterized by the depletion of estrogen, a gonadotropic hormone responsible for secondary sexual characteristics in women. In addition to sexual dimorphism, estrogen also participates in glucose-lipid homeostasis, and estrogen depletion is associated with insulin resistance in the female body. Estrogen level in the gut also regulates the microbiota composition, and even conjugated estrogen is actively metabolized by the estrobolome to maintain insulin levels. Moreover, post-menopausal gut microbiota is different from the pre-menopausal gut microbiota, as it is less diverse and lacks the mucolytic Akkermansia and short-chain fatty acid (SCFA) producers such as Faecalibacterium and Roseburia. Through various metabolites (SCFAs, secondary bile acid, and serotonin), the gut microbiota plays a significant role in regulating glucose homeostasis, oxidative stress, and T2D-associated pro-inflammatory cytokines (IL-1, IL-6). While gut dysbiosis is common among post-menopausal women, dietary interventions such as probiotics, prebiotics, and synbiotics can ease post-menopausal gut dysbiosis. The objective of this review is to understand the relationship between post-menopausal gut dysbiosis and T2D-associated factors. Additionally, the study also provided dietary recommendations to avoid T2D progression among post-menopausal women.
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Affiliation(s)
- Vineet Singh
- Department of Applied Biosciences, Kyungpook National University, Daegu, South Korea
| | - Yeong-Jun Park
- Department of Applied Biosciences, Kyungpook National University, Daegu, South Korea
| | - GyuDae Lee
- Department of Applied Biosciences, Kyungpook National University, Daegu, South Korea
| | - Tatsuya Unno
- Department of Biotechnology, Jeju National University, Jeju, South Korea
| | - Jae-Ho Shin
- Department of Applied Biosciences, Kyungpook National University, Daegu, South Korea
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14
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Mank JE, Rideout EJ. Developmental mechanisms of sex differences: from cells to organisms. Development 2021; 148:272484. [PMID: 34647574 DOI: 10.1242/dev.199750] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Male-female differences in many developmental mechanisms lead to the formation of two morphologically and physiologically distinct sexes. Although this is expected for traits with prominent differences between the sexes, such as the gonads, sex-specific processes also contribute to traits without obvious male-female differences, such as the intestine. Here, we review sex differences in developmental mechanisms that operate at several levels of biological complexity - molecular, cellular, organ and organismal - and discuss how these differences influence organ formation, function and whole-body physiology. Together, the examples we highlight show that one simple way to gain a more accurate and comprehensive understanding of animal development is to include both sexes.
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Affiliation(s)
- Judith E Mank
- Department of Zoology, Biodiversity Research Centre, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada.,Biosciences, University of Exeter, Penryn Campus, Penryn TR10 9FE, UK
| | - Elizabeth J Rideout
- Department of Cellular and Physiological Sciences, Life Sciences Institute, The University of British Columbia, Vancouver, BC V6T 1Z3, Canada
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