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Martins TBFDS, Gomes OV, Soltani P, Oliveira THR, de Brito-Gomes JL. Sex-Related Glycemic and Cardiovascular Responses After Continuous and Interval Aerobic Sessions in Patients With Type 1 Diabetes: A Randomized Crossover Study. Am J Cardiol 2024; 228:48-55. [PMID: 39094945 DOI: 10.1016/j.amjcard.2024.07.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2024] [Revised: 07/01/2024] [Accepted: 07/20/2024] [Indexed: 08/04/2024]
Abstract
We aimed to investigate sex-related glycemic and cardiovascular responses after intensity- (moderate) and duration- (30 minutes) matched interval aerobic exercise (IAE) and continuous (CAE) aerobic exercise sessions in patients with type 1 diabetes mellitus (T1DM). A total of 19 volunteers (10 women) participated in 2 randomized and crossover sessions (1:1). Heart rate, systolic and diastolic blood pressure, double product, and blood glucose (BG) levels were measured before (PRE), immediately after (POST-0), and 20 minutes after (POST-20) each session. The rates of perceived exertion (RPE) and enjoyment levels (ELs) were assessed after each session. Generalized estimating equations were used to analyze the data (condition × time × sex). Regarding sex-related changes, men showed BG reductions at POST-0 and POST-20 after CAE (∆: -3.7 and -3.7 mmol/L, respectively) and only at POST-0 after IAE (∆: -1.6 mmol/L), with 1 episode of hypoglycemia occurring in the latter group. In contrast, women showed reduced BG values only after CAE at both time points (∆: -1.4 and -1.7 mmol/L) compared with PRE values. The decrease in BG levels at both time points was higher for men after CAE than IAE. Cardiovascular responses, RPEs, and ELs were similar between exercise sessions, except for blood pressure, which showed higher values in men. In conclusion, lower BG levels were observed after CAE, with greater reductions in men. Similar cardiovascular, RPE, and EL responses were found across sexes and sessions. Consideration of sex-specific recommendations may be warranted when prescribing aerobic exercise, particularly, for men with irregular physical activity levels.
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Affiliation(s)
- Tamy Beatriz Freire de Sá Martins
- Department of Medicine, Universidade Federal do Vale do São Francisco, Petrolina, Brazil; Department of Physical Education, Universidade Federal do Vale do São Francisco, Petrolina, Brazil
| | - Orlando Vieira Gomes
- Department of Medicine, Universidade Federal do Vale do São Francisco, Petrolina, Brazil
| | - Pooya Soltani
- School of Digital, Technology, Innovation and Business, Staffordshire University, Stoke-on-Trent, United Kingdom
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2
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Abo SMC, Layton AT. Modeling sex-specific whole-body metabolic responses to feeding and fasting. Comput Biol Med 2024; 181:109024. [PMID: 39178806 DOI: 10.1016/j.compbiomed.2024.109024] [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: 05/21/2024] [Revised: 07/27/2024] [Accepted: 08/11/2024] [Indexed: 08/26/2024]
Abstract
Men generally favor carbohydrate metabolism, while women lean towards lipid metabolism, resulting in significant sex-based differences in energy oxidation across various metabolic states such as fasting and feeding. These differences are influenced by body composition and inherent metabolic fluxes, including increased lipolysis rates in women. However, understanding how sex influences organ-specific metabolism and systemic manifestations remains incomplete. To address these gaps, we developed a sex-specific, whole-body metabolic model for feeding and fasting scenarios in healthy young adults. Our model integrates organ metabolism with whole-body responses to mixed meals, particularly high-carbohydrate and high-fat meals. Our predictions suggest that differences in liver and adipose tissue nutrient storage and oxidation patterns drive systemic metabolic disparities. We propose that sex differences in fasting hepatic glucose output may result from the different handling of free fatty acids, glycerol, and glycogen. We identified a metabolic pathway, possibly more prevalent in female livers, redirecting lipids towards carbohydrate metabolism to support hepatic glucose production. This mechanism is facilitated by the TG-FFA cycle between adipose tissue and the liver. Incorporating sex-specific data into multi-scale frameworks offers insights into how sex modulates human metabolism.
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Affiliation(s)
- Stéphanie M C Abo
- Department of Applied Mathematics, University of Waterloo, 200 University Ave W, Waterloo, N2L 3G1, Ontario, Canada.
| | - Anita T Layton
- Department of Applied Mathematics, University of Waterloo, 200 University Ave W, Waterloo, N2L 3G1, Ontario, Canada; Cheriton School of Computer Science, Department of Biology, and School of Pharmacy, 200 University Ave W, Waterloo, N2L 3G1, Ontario, Canada.
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3
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Sanchez BN, Volek JS, Kraemer WJ, Saenz C, Maresh CM. Sex Differences in Energy Metabolism: A Female-Oriented Discussion. Sports Med 2024; 54:2033-2057. [PMID: 38888855 DOI: 10.1007/s40279-024-02063-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/31/2024] [Indexed: 06/20/2024]
Abstract
The purpose of this review is to delineate aspects of energy metabolism at rest and during exercise that may be subject to sex differences and the potential underlying mechanisms involved. It focuses on distinct aspects of female physiology with an oriented discussion following the reproductive life stages of healthy, eumenorrheic females, including premenopausal time frames, pregnancy, perimenopause, and menopause. Finally, this review aims to address methodological challenges surrounding sexual dimorphism in energy metabolism investigations and confounding factors in this field. During resting conditions, females tend to have higher rates of non-oxidative free fatty acid clearance, which could contribute to lower respiratory exchange ratio measures. At the same time, carbohydrate energy metabolism findings are mixed. In general, females favor lipid energy metabolism during moderate-intensity exercise, while men favor carbohydrate energy metabolism. Factors such as age, dietary intake, genetics, and methodological decisions confound study findings, including properly identifying and reporting the menstrual cycle phase when female subjects are eumenorrheic. Pregnancy presents a unique shift in physiological systems, including energy metabolism, which can be observed at rest and during exercise. Changes in body composition and hormonal levels during the post-menopausal period directly impact energy metabolism, specifically lipid metabolism. This change in physiological state factors into the evidence showing a reduction in our understanding of sex differences in lipid metabolism during exercise in older adults. This review reveals a need for a focused understanding of female energy metabolism that could help exercise and nutrition professionals optimize female health and performance across the lifespan.
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Affiliation(s)
- Barbara N Sanchez
- Exercise Science, Department of Health Sciences, College of Education, Nursing and Health Professions, University of Hartford, 200 Bloomfield Avenue, West Hartford, CT, USA.
| | - Jeff S Volek
- Exercise Science, Department of Human Sciences, College of Education and Human Ecology, The Ohio State University, Columbus, OH, USA
| | - William J Kraemer
- Exercise Science, Department of Human Sciences, College of Education and Human Ecology, The Ohio State University, Columbus, OH, USA
| | - Catherine Saenz
- Exercise Science, Department of Human Sciences, College of Education and Human Ecology, The Ohio State University, Columbus, OH, USA
| | - Carl M Maresh
- Exercise Science, Department of Human Sciences, College of Education and Human Ecology, The Ohio State University, Columbus, OH, USA
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4
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Kang CW, Oh JH, Wang EK, Bao Y, Kim YB, Lee MH, Lee YJ, Jo YS, Ku CR, Lee EJ. Excess endocrine growth hormone in acromegaly promotes the aggressiveness and metastasis of triple-negative breast cancer. iScience 2024; 27:110137. [PMID: 39006481 PMCID: PMC11246000 DOI: 10.1016/j.isci.2024.110137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 01/24/2024] [Accepted: 05/27/2024] [Indexed: 07/16/2024] Open
Abstract
Pituitary adenoma-induced excess endocrine growth hormone (GH) secretion can lead to breast cancer development and metastasis. Herein, we used an acromegaly mouse model to investigate the role of excess endocrine GH on triple-negative breast cancer (TNBC) growth and metastasis. Additionally, we aimed to elucidate the molecular mechanism of transcription factor 20 (TCF20)/nuclear factor erythroid 2-related factor 2 (NRF2) signaling-mediated aggressiveness and metastasis of TNBC. Excess endocrine GH induced TCF20 activates the transcription of NRF2 and NRF2-target genes to facilitate TNBC metastasis. Inhibition of GH receptor (GHR) and TCF20 activity using the GHR antagonist or small-interfering RNA-induced gene knockdown resulted in reduced tumor volume and metastasis, suggesting that excess endocrine GH stimulates TCF20/NRF2 pathways in TNBC and promotes metastasis to the lung. GHR inhibitors present an effective therapeutic strategy to prevent TNBC cell growth and metastasis. Our findings revealed functional and mechanistic roles of the GH-TCF20-NRF2 signaling axis in TBNC progression.
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Affiliation(s)
- Chan Woo Kang
- Department of Internal Medicine Endocrinology, Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea
| | - Ju Hun Oh
- Department of Internal Medicine Endocrinology, Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea
| | - Eun Kyung Wang
- Department of Internal Medicine Endocrinology, Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea
| | - Yaru Bao
- Department of Internal Medicine Endocrinology, Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University, College of Medicine, Seoul, South Korea
| | - Ye Bin Kim
- Department of Internal Medicine Endocrinology, Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University, College of Medicine, Seoul, South Korea
| | - Min-Ho Lee
- University of Medicine and Health Sciences, New York, NY, USA
| | - Yang Jong Lee
- Department of Internal Medicine Endocrinology, Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea
| | - Young Seok Jo
- Open NBI Convergence Technology Research Laboratory, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - Cheol Ryong Ku
- Department of Internal Medicine Endocrinology, Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea
| | - Eun Jig Lee
- Department of Internal Medicine Endocrinology, Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea
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5
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Ballard DH, Nguyen GK, Atagu N, Camps G, Salter A, Jaswal S, Naeem M, Ludwig DR, Mellnick VM, Peterson LR, Hawkins WG, Fields RC, Luo J, Ippolito JE. Female-specific pancreatic cancer survival from CT imaging of visceral fat implicates glutathione metabolism in solid tumors. Acad Radiol 2024; 31:2312-2323. [PMID: 38129228 DOI: 10.1016/j.acra.2023.11.012] [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: 05/30/2023] [Revised: 11/05/2023] [Accepted: 11/06/2023] [Indexed: 12/23/2023]
Abstract
RATIONALE AND OBJECTIVES To identify if body composition, assessed with preoperative CT-based visceral fat ratio quantification as well as tumor metabolic gene expression, predicts sex-dependent overall survival (OS) in patients with pancreatic ductal adenocarcinoma (PDAC). MATERIALS AND METHODS This was a retrospective analysis of preoperative CT in 98 male and 107 female patients with PDAC. Relative visceral fat (rVFA; visceral fat normalized to total fat) was measured automatically using software and corrected manually. Median and optimized rVFA thresholds were determined according to published methods. Kaplan Meier and log-rank tests were used to estimate OS. Multivariate models were developed to identify interactions between sex, rVFA, and OS. Unsupervised gene expression analysis of PDAC tumors from The Cancer Genome Atlas (TCGA) was performed to identify metabolic pathways with similar survival patterns to rVFA. RESULTS Optimized preoperative rVFA threshold of 38.9% predicted significantly different OS in females with a median OS of 15 months (above threshold) vs 24 months (below threshold; p = 0.004). No significant threshold was identified in males. This female-specific significance was independent of age, stage, and presence of chronic pancreatitis (p = 0.02). Tumor gene expression analysis identified female-specific stratification from a five-gene signature of glutathione S-transferases. This was observed for PDAC as well as clear cell renal carcinoma and glioblastoma. CONCLUSION CT-based assessments of visceral fat can predict pancreatic cancer OS in females. Glutathione S-transferase expression in tumors predicts female-specific OS in a similar fashion.
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Affiliation(s)
- David H Ballard
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO (D.H.B., G.K.N., S.J., D.R.L., V.M.M., J.E.I.)
| | - Gerard K Nguyen
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO (D.H.B., G.K.N., S.J., D.R.L., V.M.M., J.E.I.)
| | - Norman Atagu
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland (N.A.)
| | - Garrett Camps
- Washington University School of Medicine, Washington University School of Medicine, St. Louis, MO (G.C.)
| | - Amber Salter
- Department of Neurology, Section on Statistical Planning and Analysis, UT Southwestern Medical Center, Dallas, TX (A.S.)
| | - Shama Jaswal
- Department of Radiology, Weill Cornell Medical Center/New York Presbyterian Hopsital, New York, NY (S.J.)
| | - Muhammad Naeem
- Department of Radiology, Emory University School of Medicine, Atlanta, GA (M.N.)
| | - Daniel R Ludwig
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO (D.H.B., G.K.N., S.J., D.R.L., V.M.M., J.E.I.)
| | - Vincent M Mellnick
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO (D.H.B., G.K.N., S.J., D.R.L., V.M.M., J.E.I.)
| | - Linda R Peterson
- Department of Medicine, Washington University School of Medicine, St. Louis, MO (L.R.P.)
| | - William G Hawkins
- Department of Surgery, Washington University School of Medicine, St. Louis, MO (W.G.H., R.C.F.)
| | - Ryan C Fields
- Department of Surgery, Washington University School of Medicine, St. Louis, MO (W.G.H., R.C.F.)
| | - Jingqin Luo
- Division of Public Health Sciences, Department of Surgery, Washington University School of Medicine, St Louis, MO (J.L.)
| | - Joseph E Ippolito
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO (D.H.B., G.K.N., S.J., D.R.L., V.M.M., J.E.I.).
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6
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Ruppert PMM, Kersten S. Mechanisms of hepatic fatty acid oxidation and ketogenesis during fasting. Trends Endocrinol Metab 2024; 35:107-124. [PMID: 37940485 DOI: 10.1016/j.tem.2023.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/02/2023] [Accepted: 10/04/2023] [Indexed: 11/10/2023]
Abstract
Fasting is part of many weight management and health-boosting regimens. Fasting causes substantial metabolic adaptations in the liver that include the stimulation of fatty acid oxidation and ketogenesis. The induction of fatty acid oxidation and ketogenesis during fasting is mainly driven by interrelated changes in plasma levels of various hormones and an increase in plasma nonesterified fatty acid (NEFA) levels and is mediated transcriptionally by the peroxisome proliferator-activated receptor (PPAR)α, supported by CREB3L3 (cyclic AMP-responsive element-binding protein 3 like 3). Compared with men, women exhibit higher ketone levels during fasting, likely due to higher NEFA availability, suggesting that the metabolic response to fasting shows sexual dimorphism. Here, we synthesize the current molecular knowledge on the impact of fasting on hepatic fatty acid oxidation and ketogenesis.
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Affiliation(s)
- Philip M M Ruppert
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, 5000 C Odense, Denmark
| | - Sander Kersten
- Nutrition, Metabolism, and Genomics Group, Division of Human Nutrition and Health, Wageningen University, 6708 WE Wageningen, The Netherlands; Division of Nutritional Sciences, Cornell University, Ithaca, NY 14853, USA.
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7
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de Assis RC, Celedonio RF, Valentim AB, Monteiro GR, da Silva AMH, Dantas ACP, Maia CSC. Influence of Anaerobic Exercise in Type 1 Diabetes Mellitus Biomarkers: ASystematic Review. Curr Diabetes Rev 2024; 20:e230124226018. [PMID: 38275039 DOI: 10.2174/0115733998274125231126111321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 10/23/2023] [Accepted: 10/24/2023] [Indexed: 01/27/2024]
Abstract
AIM Physical exercise is part of the type 1 diabetes mellitus (T1DM) treatment. However, this practice is still neglected due to the wide variety of glycemic responses under the influence of anaerobic exercise. Therefore, this study aimed to investigate the influence of anaerobic exercise on biomarkers of T1DM. METHODS The systematic review was conducted on PubMed, Lilacs, and Embase, according to PRISMA. For this purpose, three groups of descriptors were used: Adults with T1DM, anaerobic physical exercise, and glycemic control. The search filter was set to human beings older than 18 years of age, longitudinal and cross-sectional studies, with studies published from 2000 to 2023 in English, Spanish, or Portuguese. Titles and abstracts were read independently by two reviewers, and then the articles were selected for this review. The Kappa coefficient was measured to evaluate the selection. RESULTS A total of 738 articles were identified, and five were selected to be part of the review after applying the steps of the procedure. Some benefits were observed in fatigue reduction, absence of diabetic ketoacidosis requiring hospitalization, and enhancement of glucose monitoring during exercise. In the anaerobic workouts of the groups with T1DM, glycemic mean values ranged from 124.5-185.0 mg/dl, and glycated hemoglobin records ranged from 6.7-8.1%. CONCLUSION Anaerobic exercise improved the biomarkers of T1DM, especially glycemic control, and the reduction of symptomatic hypoglycemic episodes. Anaerobic exercise can be performed by individuals with T1DM, suggesting an individualized training prescription and encouraging its practice associated with aerobic exercise.
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Olenick AA, Pearson RC, Jenkins NT. Impact of aerobic fitness status, menstrual cycle phase, and oral contraceptive use on exercise substrate oxidation and metabolic flexibility in females. Appl Physiol Nutr Metab 2024; 49:93-104. [PMID: 37657080 DOI: 10.1139/apnm-2023-0101] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/03/2023]
Abstract
The influence of menstrual cycle phase and fitness status on metabolism during high-intensity interval exercise (HIIE) was assessed. Twenty-five females (24.4 (3.6) years) were categorized by normal menstrual cycle (n = 14) vs. oral contraceptive (OC) use (n = 11) and by aerobic fitness, high-fitness females (HFF; n = 13) vs. low-fitness females (LFF; n = 12). HIIE was four sets of four repetitions with a 3 min rest between intervals on a cycle ergometer at a power output halfway between the ventilatory threshold and V̇O2peak and performed during follicular (FOL: days 2-7 or inactive pills) and luteal phases (LUT: day ∼21 or 3rd week of active pills). Substrate oxidation was assessed via indirect calorimetry, blood lactate via finger stick, and recovery of skeletal muscle oxidative metabolism (mV̇O2) via continuous-wave near-infrared spectroscopy. HFF oxidized more fat (g·kg-1) during the full session (FOL: p = 0.050, LUT: p = 0.001), high intervals (FOL: p = 0.048, LUT: p = 0.001), low intervals (FOL: p = 0.032, LUT: p = 0.024), and LUT recovery (p = 0.033). Carbohydrate oxidation area under the curve was greater in HFF during FOL (FOL: p = 0.049, LUT: p = 0.124). Blood lactate was lower in LFF in FOL (p ≤ 0.05) but not in LUT. Metabolic flexibility (Δ fat oxidation g·kg-1·min-1) was greater in HFF than LFF during intervals 2-3 in FOL and 1-4 in LUT (p ≤ 0.05). Fitness status more positively influences exercise metabolic flexibility during HIIE than cycle phase or OC use.
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Affiliation(s)
- Alyssa A Olenick
- Department of Endocrinology and Metabolism, University of Colorado Anschutz Medical School, Aurora, CO, USA
| | - Regis C Pearson
- Department of Kinesiology, College of Education, University of Georgia, Athens, GA 30602, USA
| | - Nathan T Jenkins
- Department of Kinesiology, College of Education, University of Georgia, Athens, GA 30602, USA
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9
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Mosquera-Lopez C, Roquemen-Echeverri V, Tyler NS, Patton SR, Clements MA, Martin CK, Riddell MC, Gal RL, Gillingham M, Wilson LM, Castle JR, Jacobs PG. Combining uncertainty-aware predictive modeling and a bedtime Smart Snack intervention to prevent nocturnal hypoglycemia in people with type 1 diabetes on multiple daily injections. J Am Med Inform Assoc 2023; 31:109-118. [PMID: 37812784 PMCID: PMC10746320 DOI: 10.1093/jamia/ocad196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Accepted: 09/25/2023] [Indexed: 10/11/2023] Open
Abstract
OBJECTIVE Nocturnal hypoglycemia is a known challenge for people with type 1 diabetes, especially for physically active individuals or those on multiple daily injections. We developed an evidential neural network (ENN) to predict at bedtime the probability and timing of nocturnal hypoglycemia (0-4 vs 4-8 h after bedtime) based on several glucose metrics and physical activity patterns. We utilized these predictions in silico to prescribe bedtime carbohydrates with a Smart Snack intervention specific to the predicted minimum nocturnal glucose and timing of nocturnal hypoglycemia. MATERIALS AND METHODS We leveraged free-living datasets collected from 366 individuals from the T1DEXI Study and Glooko. Inputs to the ENN used to model nocturnal hypoglycemia were derived from demographic information, continuous glucose monitoring, and physical activity data. We assessed the accuracy of the ENN using area under the receiver operating curve, and the clinical impact of the Smart Snack intervention through simulations. RESULTS The ENN achieved an area under the receiver operating curve of 0.80 and 0.71 to predict nocturnal hypoglycemic events during 0-4 and 4-8 h after bedtime, respectively, outperforming all evaluated baseline methods. Use of the Smart Snack intervention reduced probability of nocturnal hypoglycemia from 23.9 ± 14.1% to 14.0 ± 13.3% and duration from 7.4 ± 7.0% to 2.4 ± 3.3% in silico. DISCUSSION Our findings indicate that the ENN-based Smart Snack intervention has the potential to significantly reduce the frequency and duration of nocturnal hypoglycemic events. CONCLUSION A decision support system that combines prediction of minimum nocturnal glucose and proactive recommendations for bedtime carbohydrate intake might effectively prevent nocturnal hypoglycemia and reduce the burden of glycemic self-management.
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Affiliation(s)
- Clara Mosquera-Lopez
- Artificial Intelligence for Medical Systems (AIMS) Lab, Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR 97239, United States
| | - Valentina Roquemen-Echeverri
- Artificial Intelligence for Medical Systems (AIMS) Lab, Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR 97239, United States
| | - Nichole S Tyler
- Artificial Intelligence for Medical Systems (AIMS) Lab, Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR 97239, United States
| | - Susana R Patton
- Center for Healthcare Delivery Science, Nemours Children’s Health, Jacksonville, FL 32207, United States
| | - Mark A Clements
- Children’s Mercy Hospital, Kansas City, MO 64111, United States
- Glooko Inc., Palo Alto, CA 94301, United States
| | - Corby K Martin
- Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA 70808, United States
| | - Michael C Riddell
- Muscle Health Research Centre, York University, Toronto, ON M3J1P3, Canada
| | - Robin L Gal
- Jaeb Center for Health Research, Tampa, FL 33647, United States
| | - Melanie Gillingham
- Molecular and Medical Genetics, School of Medicine, Oregon Health & Science University, Portland, OR 97239, United States
| | - Leah M Wilson
- Harold Schnitzer Diabetes Health Center, Oregon Health & Science University, Portland, OR 97239, United States
| | - Jessica R Castle
- Harold Schnitzer Diabetes Health Center, Oregon Health & Science University, Portland, OR 97239, United States
| | - Peter G Jacobs
- Artificial Intelligence for Medical Systems (AIMS) Lab, Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR 97239, United States
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10
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Park MS, Lee S, Baek Y, Lee J, Park SS, Cho JH, Jin HJ, Yoo HR. Characteristics of insulin resistance in Korean adults from the perspective of circadian and metabolic sensing genes. Genes Genomics 2023; 45:1475-1487. [PMID: 37768516 PMCID: PMC10682234 DOI: 10.1007/s13258-023-01443-0] [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: 01/21/2022] [Accepted: 08/20/2022] [Indexed: 09/29/2023]
Abstract
BACKGROUND The biological clock allows an organism to anticipate periodic environmental changes and adjust its physiology and behavior accordingly. OBJECTIVE This retrospective cross-sectional study examined circadian gene polymorphisms and clinical characteristics associated with insulin resistance (IR). METHODS We analyzed data from 1,404 Korean adults aged 30 to 55 with no history of cancer and cardio-cerebrovascular disease. The population was classified according to sex and homeostasis model assessment of insulin resistance (HOMA-IR) values. Demographics, anthropometric and clinical characteristics, and single nucleotide polymorphisms (SNPs) were analyzed with respect to sex, age, and HOMA-IR values. We used association rule mining to identify sets of SNPs from circadian and metabolic sensing genes that may be associated with IR. RESULTS Among the subjects, 15.0% of 960 women and 24.3% of 444 men had HOMA-IR values above 2. Most of the parameters differed significantly between men and women, as well as between the groups with high and low insulin sensitivity. Body fat mass of the trunk, which was significantly higher in insulin-resistant groups, had a higher correlation with high sensitivity C-reactive protein and hemoglobin levels in women, and alanine aminotransferase and aspartate aminotransferase levels in men. Homozygous minor allele genotype sets of SNPs rs17031578 and rs228669 in the PER3 gene could be more frequently found among women with HOMA-IR values above 2 (p = .014). CONCLUSION Oxidative stress enhanced by adiposity and iron overload, which may also be linked to NRF2 and PER3-related pathways, is related to IR in adulthood. However, due to the small population size in this study, more research is needed.
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Affiliation(s)
- Miso S Park
- Clinical Trial Center, Daejeon Korean Medicine Hospital of Daejeon University, 75 Daedeok-daero 176beon-gil, Seo- gu, Daejeon, 35235, Korea.
- Department of Cardiology and Neurology of Korean Medicine, College of Korean Medicine, Daejeon University, Daejeon, Korea.
| | - Siwoo Lee
- KM Data Division, Korea Institute of Oriental Medicine, 1672 Yuseong-daero, Yuseong-gu, Daejeon, 34054, Korea
| | - Younghwa Baek
- KM Data Division, Korea Institute of Oriental Medicine, 1672 Yuseong-daero, Yuseong-gu, Daejeon, 34054, Korea
| | - Juho Lee
- Data Convergence Drug Research Center, Korea Research Institute of Chemical Technology, University of Science & Technology, Daejeon, Korea
| | - Sang-Soo Park
- Clinical Trial Center, Daejeon Korean Medicine Hospital of Daejeon University, 75 Daedeok-daero 176beon-gil, Seo- gu, Daejeon, 35235, Korea
| | - Jung-Hyo Cho
- Liver and Immunology Research Center, Daejeon Korean Medicine Hospital of Daejeon University, Daejeon, Korea
| | - Hee-Jeong Jin
- KM Data Division, Korea Institute of Oriental Medicine, 1672 Yuseong-daero, Yuseong-gu, Daejeon, 34054, Korea
| | - Ho-Ryong Yoo
- Clinical Trial Center, Daejeon Korean Medicine Hospital of Daejeon University, 75 Daedeok-daero 176beon-gil, Seo- gu, Daejeon, 35235, Korea
- Department of Cardiology and Neurology of Korean Medicine, College of Korean Medicine, Daejeon University, Daejeon, Korea
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11
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D’Souza NC, Kesibi D, Yeung C, Shakeri D, D’Souza AI, Macpherson AK, Riddell MC. The Impact of Sex, Body Mass Index, Age, Exercise Type and Exercise Duration on Interstitial Glucose Levels during Exercise. SENSORS (BASEL, SWITZERLAND) 2023; 23:9059. [PMID: 38005447 PMCID: PMC10674905 DOI: 10.3390/s23229059] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 11/03/2023] [Accepted: 11/06/2023] [Indexed: 11/26/2023]
Abstract
The impact of age, sex and body mass index on interstitial glucose levels as measured via continuous glucose monitoring (CGM) during exercise in the healthy population is largely unexplored. We conducted a multivariable generalized estimating equation (GEE) analysis on CGM data (Dexcom G6, 10 days) collected from 119 healthy exercising individuals using CGM with the following specified covariates: age; sex; BMI; exercise type and duration. Females had lower postexercise glycemia as compared with males (92 ± 18 vs. 100 ± 20 mg/dL, p = 0.04) and a greater change in glycemia during exercise from pre- to postexercise (p = 0.001) or from pre-exercise to glucose nadir during exercise (p = 0.009). Younger individuals (i.e., <20 yrs) had higher glucose during exercise as compared with all other age groups (all p < 0.05) and less CGM data in the hypoglycemic range (<70 mg/dL) as compared with those aged 20-39 yrs (p < 0.05). Those who were underweight, based on body mass index (BMI: <18.5 kg/m2), had higher pre-exercise glycemia than the healthy BMI group (104 ± 20 vs. 97 ± 17 mg/dL, p = 0.02) but similar glucose levels after exercise. Resistance exercise was associated with less of a drop in glycemia as compared with aerobic or mixed forms of exercise (p = 0.008) and resulted in a lower percent of time in the hypoglycemic (p = 0.04) or hyperglycemic (glucose > 140 mg/dL) (p = 0.03) ranges. In summary, various factors such as age, sex and exercise type appear to have subtle but potentially important influence on CGM measurements during exercise in healthy individuals.
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Affiliation(s)
- Ninoschka C. D’Souza
- School of Kinesiology and Health Science, Faculty of Health, York University, Toronto, ON M3J 1P3, Canada; (N.C.D.); (D.K.); (C.Y.); (D.S.); (A.K.M.)
| | - Durmalouk Kesibi
- School of Kinesiology and Health Science, Faculty of Health, York University, Toronto, ON M3J 1P3, Canada; (N.C.D.); (D.K.); (C.Y.); (D.S.); (A.K.M.)
| | - Christopher Yeung
- School of Kinesiology and Health Science, Faculty of Health, York University, Toronto, ON M3J 1P3, Canada; (N.C.D.); (D.K.); (C.Y.); (D.S.); (A.K.M.)
| | - Dorsa Shakeri
- School of Kinesiology and Health Science, Faculty of Health, York University, Toronto, ON M3J 1P3, Canada; (N.C.D.); (D.K.); (C.Y.); (D.S.); (A.K.M.)
| | | | - Alison K. Macpherson
- School of Kinesiology and Health Science, Faculty of Health, York University, Toronto, ON M3J 1P3, Canada; (N.C.D.); (D.K.); (C.Y.); (D.S.); (A.K.M.)
| | - Michael C. Riddell
- School of Kinesiology and Health Science, Faculty of Health, York University, Toronto, ON M3J 1P3, Canada; (N.C.D.); (D.K.); (C.Y.); (D.S.); (A.K.M.)
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12
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Liu X, Khalil AEMM, Muthukumarasamy U, Onogi Y, Yan X, Singh I, Lopez-Gonzales E, Israel A, Serrano AC, Strowig T, Ussar S. Reduced intestinal lipid absorption improves glucose metabolism in aged G2-Terc knockout mice. BMC Biol 2023; 21:150. [PMID: 37403071 DOI: 10.1186/s12915-023-01629-8] [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: 11/05/2022] [Accepted: 05/22/2023] [Indexed: 07/06/2023] Open
Abstract
BACKGROUND Biological aging is an important factor leading to the development of pathologies associated with metabolic dysregulation, including type 2 diabetes, cancer, cardiovascular and neurodegenerative diseases. Telomere length, a central feature of aging, has additionally been identified as inversely associated with glucose tolerance and the development of type 2 diabetes. However, the effects of shortened telomeres on body weight and metabolism remain incompletely understood. Here, we studied the metabolic consequences of moderate telomere shortening using second generation loss of telomerase activity in mice. RESULTS Aged male and female G2 Terc-/- mice and controls were characterized with respect to body weight and composition, glucose homeostasis, insulin sensitivity and metabolic activity. This was complemented with molecular and histological analysis of adipose tissue, liver and the intestine as well as microbiota analysis. We show that moderate telomere shortening leads to improved insulin sensitivity and glucose tolerance in aged male and female G2 Terc-/- mice. This is accompanied by reduced fat and lean mass in both sexes. Mechanistically, the metabolic improvement results from reduced dietary lipid uptake in the intestine, characterized by reduced gene expression of fatty acid transporters in enterocytes of the small intestine. Furthermore, G2-Terc-/- mice showed significant alterations in the composition of gut microbiota, potentially contributing to the improved glucose metabolism. CONCLUSIONS Our study shows that moderate telomere shortening reduces intestinal lipid absorption, resulting in reduced adiposity and improved glucose metabolism in aged mice. These findings will guide future murine and human aging studies and provide important insights into the age associated development of type 2 diabetes and metabolic syndrome.
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Affiliation(s)
- Xue Liu
- RG Adipocytes & Metabolism, Institute for Diabetes & Obesity, Helmholtz Diabetes Center, Helmholtz Center Munich, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany
- German Center for Diabetes Research (DZD), 85764, Neuherberg, Germany
| | - Ahmed Elagamy Mohamed Mahmoud Khalil
- RG Adipocytes & Metabolism, Institute for Diabetes & Obesity, Helmholtz Diabetes Center, Helmholtz Center Munich, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany
- German Center for Diabetes Research (DZD), 85764, Neuherberg, Germany
| | | | - Yasuhiro Onogi
- RG Adipocytes & Metabolism, Institute for Diabetes & Obesity, Helmholtz Diabetes Center, Helmholtz Center Munich, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany
- German Center for Diabetes Research (DZD), 85764, Neuherberg, Germany
| | - Xiaocheng Yan
- RG Adipocytes & Metabolism, Institute for Diabetes & Obesity, Helmholtz Diabetes Center, Helmholtz Center Munich, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany
- German Center for Diabetes Research (DZD), 85764, Neuherberg, Germany
| | - Inderjeet Singh
- RG Adipocytes & Metabolism, Institute for Diabetes & Obesity, Helmholtz Diabetes Center, Helmholtz Center Munich, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany
- German Center for Diabetes Research (DZD), 85764, Neuherberg, Germany
| | - Elena Lopez-Gonzales
- RG Adipocytes & Metabolism, Institute for Diabetes & Obesity, Helmholtz Diabetes Center, Helmholtz Center Munich, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany
- German Center for Diabetes Research (DZD), 85764, Neuherberg, Germany
| | - Andreas Israel
- RG Adipocytes & Metabolism, Institute for Diabetes & Obesity, Helmholtz Diabetes Center, Helmholtz Center Munich, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany
- German Center for Diabetes Research (DZD), 85764, Neuherberg, Germany
| | - Alberto Cebrian Serrano
- German Center for Diabetes Research (DZD), 85764, Neuherberg, Germany
- Institute for Diabetes & Obesity, Helmholtz Diabetes Center, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, 85764, Neuherberg, Germany
| | - Till Strowig
- Microbial Immune Regulation Research Group, Helmholtz Centre for Infection Research, Brunswick, Germany
- Hannover Medical School, Hannover, Germany
| | - Siegfried Ussar
- RG Adipocytes & Metabolism, Institute for Diabetes & Obesity, Helmholtz Diabetes Center, Helmholtz Center Munich, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Ingolstaedter Landstrasse 1, 85764, Neuherberg, Germany.
- German Center for Diabetes Research (DZD), 85764, Neuherberg, Germany.
- Department of Medicine, Technische Universität München, Munich, Germany.
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13
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Armstrong M, Colberg SR, Sigal RJ. Where to Start? Physical Assessment, Readiness, and Exercise Recommendations for People With Type 1 or Type 2 Diabetes. Diabetes Spectr 2023; 36:105-113. [PMID: 37193205 PMCID: PMC10182968 DOI: 10.2337/dsi22-0016] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Exercise plays an important role in the management of diabetes and is associated with many benefits such as decreased morbidity and mortality. For people exhibiting signs and symptoms of cardiovascular disease, pre-exercise medical clearance is warranted; however, requiring broad screening requirements can lead to unnecessary barriers to initiating an exercise program. Robust evidence supports the promotion of both aerobic and resistance training, with evidence emerging on the importance of reducing sedentary time. For people with type 1 diabetes, there are special considerations, including hypoglycemia risk and prevention, exercise timing (including prandial status), and differences in glycemic responses based on biological sex.
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Affiliation(s)
- Marni Armstrong
- Medicine Strategic Clinical Network, Alberta Health Services, Alberta, Canada
- Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Sheri R. Colberg
- Human Movement Sciences Department, Old Dominion University, Norfolk, VA
| | - Ronald J. Sigal
- Departments of Medicine, Cardiac Sciences, and Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
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14
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Dakic TB, Markelic MB, Ruzicic AA, Jevdjovic TV, Lakic IV, Djordjevic JD, Vujovic PZ. Hypothalamic insulin expression remains unaltered after short-term fasting in female rats. Endocrine 2022; 78:476-483. [PMID: 36301508 DOI: 10.1007/s12020-022-03235-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 10/15/2022] [Indexed: 11/03/2022]
Abstract
PURPOSE Our previous study showed that 6-h fasting increased insulin expression in the hypothalamus of male rats. We, therefore, wanted to examine if this phenomenon occurs in female rats and whether it depended on the estrus cycle phase. METHODS Female rats in proestrus or diestrus were either exposed to 6-h fasting or had ad libitum access to food. The serum, cerebrospinal fluid, and hypothalamic insulin levels were determined using radioimmunoassay. The hypothalamic insulin mRNA expression was measured by RT-qPCR, while the hypothalamic insulin distribution was assessed immunohistochemically. RESULTS Albeit the short-term fasting lowered circulating insulin, both hypothalamic insulin mRNA expression and hypothalamic insulin content remained unaltered. As for the hypothalamic insulin distribution, strong insulin immunopositivity was noted primarily in ependymal cells lining the upper part of the third ventricle and some neurons mainly located within the periventricular nucleus. The pattern of insulin distribution was similar between the controls and the females exposed to fasting regardless of the estrous cycle phase. CONCLUSION The findings of this study indicate that the control of insulin expression in the hypothalamus differs from that in the pancreatic beta cells during short-term fasting. Furthermore, they also imply that the regulation of insulin expression in the female hypothalamus is different from males but independent of the estrus cycle phase.
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Affiliation(s)
- Tamara B Dakic
- Department for Comparative Physiology and Ecophysiology, Institute for Physiology and Biochemistry Ivan Djaja, University of Belgrade-Faculty of Biology, Studentski trg 16, 11000, Belgrade, Serbia.
| | - Milica B Markelic
- Department of Cell and Tissue Biology, Institute for Zoology, University of Belgrade-Faculty of Biology, Studentski trg 16, 11000, Belgrade, Serbia
| | - Aleksandra A Ruzicic
- Department for Comparative Physiology and Ecophysiology, Institute for Physiology and Biochemistry Ivan Djaja, University of Belgrade-Faculty of Biology, Studentski trg 16, 11000, Belgrade, Serbia
| | - Tanja V Jevdjovic
- Department for Comparative Physiology and Ecophysiology, Institute for Physiology and Biochemistry Ivan Djaja, University of Belgrade-Faculty of Biology, Studentski trg 16, 11000, Belgrade, Serbia
| | - Iva V Lakic
- Department for Comparative Physiology and Ecophysiology, Institute for Physiology and Biochemistry Ivan Djaja, University of Belgrade-Faculty of Biology, Studentski trg 16, 11000, Belgrade, Serbia
| | - Jelena D Djordjevic
- Department for Comparative Physiology and Ecophysiology, Institute for Physiology and Biochemistry Ivan Djaja, University of Belgrade-Faculty of Biology, Studentski trg 16, 11000, Belgrade, Serbia
| | - Predrag Z Vujovic
- Department for Comparative Physiology and Ecophysiology, Institute for Physiology and Biochemistry Ivan Djaja, University of Belgrade-Faculty of Biology, Studentski trg 16, 11000, Belgrade, Serbia
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15
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Navarrete E, Díaz G, Salazar AM, Montúfar-Chaveznava R, Caldelas I. Long-term changes in the diurnal temporal regulation and set points of metabolic parameters associated with chronic maternal overnutrition in rabbits. Am J Physiol Endocrinol Metab 2022; 323:E503-E516. [PMID: 36288336 DOI: 10.1152/ajpendo.00144.2022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Metabolic syndrome (MS) and obesity have become a worldwide epidemic with an alarming prevalence in women of reproductive age. Maternal metabolic condition is considered a risk factor for adverse birth outcomes and long-term MS. In this study, we developed a rabbit model of maternal overnutrition via the chronic intake of a high-fat and carbohydrate diet (HFCD), and we determined the effects of this diet on maternal metabolism and offspring metabolic set points and temporal metabolic regulation in adult life. Before and during pregnancy, the female rabbits that consumed the HFCD exhibited significant changes in body weight, serum levels of analytes associated with carbohydrate and lipid metabolism, levels of liver and kidney damage markers, and liver histology. Our data suggest that rabbits are a valuable model for studying the development of MS associated with the chronic intake of unbalanced diets and fetal metabolic programming. Furthermore, the offspring of overnourished dams exhibited considerable changes in 24-h serum metabolite profiles in adulthood, with notable sexual dimorphism. These data suggest that maternal nutritional conditions due to the chronic intake of an HFCD adversely impact key elements related to the development of circadian rhythmicity in offspring.NEW & NOTEWORTHY Maternal overnutrition previous and during pregnancy leads to long-term changes in the 24-h regulation and setpoint of metabolic profiles of the offspring.
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Affiliation(s)
- Erika Navarrete
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Georgina Díaz
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Ana María Salazar
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, México
| | | | - Ivette Caldelas
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, México
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16
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Altashina MV, Ivannikova EV, Troshina EA. Intermittent fasting: endocrine aspects: A review. TERAPEVT ARKH 2022; 94:1182-1187. [DOI: 10.26442/00403660.2022.10.201906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Indexed: 11/23/2022]
Abstract
The increasing number of overweight and obese people makes the search for new effective ways to reduce body weight extremely urgent. Recently, intermittent fasting has received a lot of attention, as a dietary protocol, presumably effective in reducing body weight. Despite the large number of studies, the effects of intermittent fasting on the human body are controversial, since studies differ in dietary options, design, and often have a small sample size. In this review of the literature, the authors cite the results of studies of the effectiveness of intermittent fasting in patients with obesity, diabetes mellitus, and high risks of developing cardiovascular diseases.
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17
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Sponagel J, Devarakonda S, Rubin JB, Luo J, Ippolito JE. De novo serine biosynthesis from glucose predicts sex-specific response to antifolates in non-small cell lung cancer cell lines. iScience 2022; 25:105339. [PMID: 36325067 PMCID: PMC9619300 DOI: 10.1016/j.isci.2022.105339] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 09/16/2022] [Accepted: 10/10/2022] [Indexed: 11/29/2022] Open
Abstract
Lung cancer is the leading cause of cancer-related death. Intriguingly, males with non-small cell lung cancer (NSCLC) have a higher mortality rate than females. Here, we investigated the role of serine metabolism as a predictive marker for sensitivity to the antifolate pemetrexed in male and female NSCLC cell lines. Using [13C6] glucose tracing in NSCLC cell lines, we found that a subset of male cells generated significantly more serine from glucose than female cells. Higher serine biosynthesis was further correlated with increased sensitivity to pemetrexed in male cells only. Concordant sex differences in metabolic gene expression were evident in NSCLC and pan-cancer transcriptome datasets, suggesting a potential mechanism with wide-reaching applicability. These data were further validated by integrating antifolate drug cytotoxicity and metabolic pathway transcriptome data from pan-cancer cell lines. Together, these findings highlight the importance of considering sex differences in cancer metabolism to improve treatment for all patients.
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Affiliation(s)
- Jasmin Sponagel
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Siddhartha Devarakonda
- Division of Medical Oncology, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Joshua B. Rubin
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA
- Department of Neuroscience Washington University School of Medicine, St Louis, MO 63110, USA
| | - Jingqin Luo
- Division of Public Health Sciences, Department of Surgery, Washington University School of Medicine, St Louis, MO 63110, USA
- Siteman Cancer Center Biostatistics Shared Resource, Washington University School of Medicine, St Louis, MO 63110, USA
| | - Joseph E. Ippolito
- Department of Radiology Washington University School of Medicine, St Louis, MO 63110, USA
- Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St Louis, MO 63110, USA
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18
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Sponagel J, Jones JK, Frankfater C, Zhang S, Tung O, Cho K, Tinkum KL, Gass H, Nunez E, Spitz DR, Chinnaiyan P, Schaefer J, Patti GJ, Graham MS, Mauguen A, Grkovski M, Dunphy MP, Krebs S, Luo J, Rubin JB, Ippolito JE. Sex differences in brain tumor glutamine metabolism reveal sex-specific vulnerabilities to treatment. MED 2022; 3:792-811.e12. [PMID: 36108629 PMCID: PMC9669217 DOI: 10.1016/j.medj.2022.08.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 07/08/2022] [Accepted: 08/22/2022] [Indexed: 01/12/2023]
Abstract
BACKGROUND Brain cancer incidence and mortality rates are greater in males. Understanding the molecular mechanisms that underlie those sex differences could improve treatment strategies. Although sex differences in normal metabolism are well described, it is currently unknown whether they persist in cancerous tissue. METHODS Using positron emission tomography (PET) imaging and mass spectrometry, we assessed sex differences in glioma metabolism in samples from affected individuals. We assessed the role of glutamine metabolism in male and female murine transformed astrocytes using isotope labeling, metabolic rescue experiments, and pharmacological and genetic perturbations to modulate pathway activity. FINDINGS We found that male glioblastoma surgical specimens are enriched for amino acid metabolites, including glutamine. Fluoroglutamine PET imaging analyses showed that gliomas in affected male individuals exhibit significantly higher glutamine uptake. These sex differences were well modeled in murine transformed astrocytes, in which male cells imported and metabolized more glutamine and were more sensitive to glutaminase 1 (GLS1) inhibition. The sensitivity to GLS1 inhibition in males was driven by their dependence on glutamine-derived glutamate for α-ketoglutarate synthesis and tricarboxylic acid (TCA) cycle replenishment. Females were resistant to GLS1 inhibition through greater pyruvate carboxylase (PC)-mediated TCA cycle replenishment, and knockdown of PC sensitized females to GLS1 inhibition. CONCLUSION Our results show that clinically important sex differences exist in targetable elements of metabolism. Recognition of sex-biased metabolism may improve treatments through further laboratory and clinical research. FUNDING This work was supported by NIH grants, Joshua's Great Things, the Siteman Investment Program, and the Barnard Research Fund.
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Affiliation(s)
- Jasmin Sponagel
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Jill K Jones
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Cheryl Frankfater
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA; Biomedical Mass Spectrometry Resource, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Shanshan Zhang
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Olivia Tung
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Kevin Cho
- Department of Chemistry, Washington University, St. Louis, MO 63130, USA; Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Kelsey L Tinkum
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Hannah Gass
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Elena Nunez
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Douglas R Spitz
- Free Radical and Radiation Biology Program, Department of Radiation Oncology, University of Iowa, Iowa City, IA 52246, USA; Holden Comprehensive Cancer Center, Department of Pathology, University of Iowa, Iowa City, IA 52246, USA
| | - Prakash Chinnaiyan
- Department of Radiation Oncology, Beaumont Health, Royal Oak, MI 48073, USA; Oakland University William Beaumont School of Medicine, Rochester, MI 48073, USA
| | - Jacob Schaefer
- Department of Chemistry, Washington University, St. Louis, MO 63130, USA
| | - Gary J Patti
- Department of Chemistry, Washington University, St. Louis, MO 63130, USA; Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA; Siteman Cancer Center, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Maya S Graham
- Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Audrey Mauguen
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Milan Grkovski
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Mark P Dunphy
- Department of Radiology, Molecular Imaging and Therapy Service, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Department of Radiology, Weill Cornell Medical College, New York, NY 10065, USA
| | - Simone Krebs
- Department of Radiology, Molecular Imaging and Therapy Service, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Department of Radiology, Weill Cornell Medical College, New York, NY 10065, USA
| | - Jingqin Luo
- Division of Public Health Sciences, Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Joshua B Rubin
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA; Siteman Cancer Center, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Neuroscience, Washington University School of Medicine, St. Louis, MO 63110, USA.
| | - Joseph E Ippolito
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA; Siteman Cancer Center, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St. Louis, MO 63110, USA.
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19
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Jaswal S, Sanders V, Pullarkat P, Teja S, Salter A, Watkins MP, Atagu N, Ludwig DR, Mhlanga J, Mellnick VM, Peterson LR, Bartlett NL, Kahl BS, Fehniger TA, Ghobadi A, Cashen AF, Mehta-Shah N, Ippolito JE. Metabolic Biomarkers Assessed with PET/CT Predict Sex-Specific Longitudinal Outcomes in Patients with Diffuse Large B-Cell Lymphoma. Cancers (Basel) 2022; 14:2932. [PMID: 35740596 PMCID: PMC9221486 DOI: 10.3390/cancers14122932] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 05/31/2022] [Accepted: 06/06/2022] [Indexed: 02/04/2023] Open
Abstract
In many cancers, including lymphoma, males have higher incidence and mortality than females. Emerging evidence demonstrates that one mechanism underlying this phenomenon is sex differences in metabolism, both with respect to tumor nutrient consumption and systemic alterations in metabolism, i.e., obesity. We wanted to determine if visceral fat and tumor glucose uptake with fluorodeoxyglucose-positron emission tomography/computed tomography (FDG-PET/CT) could predict sex-dependent outcomes in patients with diffuse large B-cell lymphoma (DLBCL). We conducted a retrospective analysis of 160 patients (84 males; 76 females) with DLBCL who had imaging at initial staging and after completion of therapy. CT-based relative visceral fat area (rVFA), PET-based SUVmax normalized to lean body mass (SULmax), and end-of-treatment FDG-PET 5PS score were calculated. Increased rVFA at initial staging was an independent predictor of poor OS only in females. At the end of therapy, increase in visceral fat was a significant predictor of poor survival only in females. Combining the change in rVFA and 5PS scores identified a subgroup of females with visceral fat gain and high 5PS with exceptionally poor outcomes. These data suggest that visceral fat and tumor FDG uptake can predict outcomes in DLBCL patients in a sex-specific fashion.
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Affiliation(s)
- Shama Jaswal
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA; (S.J.); or (V.S.); (D.R.L.); (J.M.); (V.M.M.)
| | - Vanessa Sanders
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA; (S.J.); or (V.S.); (D.R.L.); (J.M.); (V.M.M.)
| | - Priyanka Pullarkat
- Washington University School of Medicine, St. Louis, MO 63110, USA; (P.P.); (N.A.)
| | - Stephanie Teja
- Department of Medicine, Division of Medical Oncology, Washington University School of Medicine, St. Louis, MO 63110, USA; (S.T.); (M.P.W.); (N.L.B.); (B.S.K.); (T.A.F.); (A.G.); (A.F.C.)
| | - Amber Salter
- Division of Biostatistics, Washington University School of Medicine, St. Louis, MO 63110, USA;
| | - Marcus P. Watkins
- Department of Medicine, Division of Medical Oncology, Washington University School of Medicine, St. Louis, MO 63110, USA; (S.T.); (M.P.W.); (N.L.B.); (B.S.K.); (T.A.F.); (A.G.); (A.F.C.)
| | - Norman Atagu
- Washington University School of Medicine, St. Louis, MO 63110, USA; (P.P.); (N.A.)
| | - Daniel R. Ludwig
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA; (S.J.); or (V.S.); (D.R.L.); (J.M.); (V.M.M.)
| | - Joyce Mhlanga
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA; (S.J.); or (V.S.); (D.R.L.); (J.M.); (V.M.M.)
| | - Vincent M. Mellnick
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA; (S.J.); or (V.S.); (D.R.L.); (J.M.); (V.M.M.)
| | - Linda R. Peterson
- Department of Medicine, Division of Cardiology, Washington University School of Medicine, St. Louis, MO 63110, USA;
| | - Nancy L. Bartlett
- Department of Medicine, Division of Medical Oncology, Washington University School of Medicine, St. Louis, MO 63110, USA; (S.T.); (M.P.W.); (N.L.B.); (B.S.K.); (T.A.F.); (A.G.); (A.F.C.)
| | - Brad S. Kahl
- Department of Medicine, Division of Medical Oncology, Washington University School of Medicine, St. Louis, MO 63110, USA; (S.T.); (M.P.W.); (N.L.B.); (B.S.K.); (T.A.F.); (A.G.); (A.F.C.)
| | - Todd A. Fehniger
- Department of Medicine, Division of Medical Oncology, Washington University School of Medicine, St. Louis, MO 63110, USA; (S.T.); (M.P.W.); (N.L.B.); (B.S.K.); (T.A.F.); (A.G.); (A.F.C.)
| | - Armin Ghobadi
- Department of Medicine, Division of Medical Oncology, Washington University School of Medicine, St. Louis, MO 63110, USA; (S.T.); (M.P.W.); (N.L.B.); (B.S.K.); (T.A.F.); (A.G.); (A.F.C.)
| | - Amanda F. Cashen
- Department of Medicine, Division of Medical Oncology, Washington University School of Medicine, St. Louis, MO 63110, USA; (S.T.); (M.P.W.); (N.L.B.); (B.S.K.); (T.A.F.); (A.G.); (A.F.C.)
| | - Neha Mehta-Shah
- Department of Medicine, Division of Medical Oncology, Washington University School of Medicine, St. Louis, MO 63110, USA; (S.T.); (M.P.W.); (N.L.B.); (B.S.K.); (T.A.F.); (A.G.); (A.F.C.)
| | - Joseph E. Ippolito
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA; (S.J.); or (V.S.); (D.R.L.); (J.M.); (V.M.M.)
- Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St. Louis, MO 63110, USA
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Li XY, Mei J, Ge CT, Liu XL, Gui JF. Sex determination mechanisms and sex control approaches in aquaculture animals. SCIENCE CHINA. LIFE SCIENCES 2022; 65:1091-1122. [PMID: 35583710 DOI: 10.1007/s11427-021-2075-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 01/14/2022] [Indexed: 01/21/2023]
Abstract
Aquaculture is one of the most efficient modes of animal protein production and plays an important role in global food security. Aquaculture animals exhibit extraordinarily diverse sexual phenotypes and underlying mechanisms, providing an ideal system to perform sex determination research, one of the important areas in life science. Moreover, sex is also one of the most valuable traits because sexual dimorphism in growth, size, and other economic characteristics commonly exist in aquaculture animals. Here, we synthesize current knowledge of sex determination mechanisms, sex chromosome evolution, reproduction strategies, and sexual dimorphism, and also review several approaches for sex control in aquaculture animals, including artificial gynogenesis, application of sex-specific or sex chromosome-linked markers, artificial sex reversal, as well as gene editing. We anticipate that better understanding of sex determination mechanisms and innovation of sex control approaches will facilitate sustainable development of aquaculture.
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Affiliation(s)
- Xi-Yin Li
- State Key Laboratory of Freshwater Ecology and Biotechnology, Hubei Hongshan Laboratory, The Innovative Academy of Seed Design, Institute of Hydrobiology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Wuhan, 430072, China
| | - Jie Mei
- College of Fisheries, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, 430070, China
| | - Chu-Tian Ge
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, 315100, China
| | - Xiao-Li Liu
- Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation of Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
| | - Jian-Fang Gui
- State Key Laboratory of Freshwater Ecology and Biotechnology, Hubei Hongshan Laboratory, The Innovative Academy of Seed Design, Institute of Hydrobiology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Wuhan, 430072, China.
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Insulin-like Growth Factor I Couples Metabolism with Circadian Activity through Hypo-Thalamic Orexin Neurons. Int J Mol Sci 2022; 23:ijms23094679. [PMID: 35563069 PMCID: PMC9101627 DOI: 10.3390/ijms23094679] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/20/2022] [Accepted: 04/21/2022] [Indexed: 02/06/2023] Open
Abstract
Uncoupling of metabolism and circadian activity is associated with an increased risk of a wide spectrum of pathologies. Recently, insulin and the closely related insulin-like growth factor I (IGF-I) were shown to entrain feeding patterns with circadian rhythms. Both hormones act centrally to modulate peripheral glucose metabolism; however, whereas central targets of insulin actions are intensely scrutinized, those mediating the actions of IGF-I remain less defined. We recently showed that IGF-I targets orexin neurons in the lateral hypothalamus, and now we evaluated whether IGF-I modulates orexin neurons to align circadian rhythms with metabolism. Mice with disrupted IGF-IR activity in orexin neurons (Firoc mice) showed sexually dimorphic alterations in daily glucose rhythms and feeding activity patterns which preceded the appearance of metabolic disturbances. Thus, Firoc males developed hyperglycemia and glucose intolerance, while females developed obesity. Since IGF-I directly modulates orexin levels and hepatic expression of KLF genes involved in circadian and metabolic entrainment in an orexin-dependent manner, it seems that IGF-I entrains metabolism and circadian rhythms by modulating the activity of orexin neurons.
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Liu H, Wang X, Shen P, Ni Y, Han X. The basic functions of phosphoglycerate kinase 1 and its roles in cancer and other diseases. Eur J Pharmacol 2022; 920:174835. [DOI: 10.1016/j.ejphar.2022.174835] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 02/15/2022] [Indexed: 01/17/2023]
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Maggi A. Sex and Liver Disease: The Necessity of an Overarching Theory to Explain the Effect of Sex on Nonreproductive Functions. Endocrinology 2022; 163:6425114. [PMID: 34758075 PMCID: PMC8826248 DOI: 10.1210/endocr/bqab229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Indexed: 11/19/2022]
Abstract
The number of studies illuminating major sex differences in liver metabolic activities is growing, but we still lack a theory to explain the origin of the functional differences we are identifying. In the animal kingdom, energy metabolism is tightly associated with reproduction; conceivably, the major evolutionary step that occurred about 200 million years ago with placentation determined a significant change in female physiology, as females had to create new energy strategies to allow the growth of the embryo in the womb and the lactation of the newborn. In vertebrates the liver is the metabolic organ most tuned to gonadal functions because the liver synthesizes and transports of all the components necessary for the maturation of the egg upon estrogenic stimulation. Thus, in mammals, evolution must have worked on the already strict gonad-liver relationship fostering these novel reproductive needs. As a consequence, the functions of mammalian liver in females diverged from that in males to acquire the flexibility necessary to tailor metabolism according to reproductive status and to ensure the parsimonious exploitation and storage of energy for the continuation of gestation in case of food scarcity. Indeed, several studies show that male and female livers adopt very different strategies when confronted with nutritional stress of varied origins. Considering the role of liver and energy metabolism in most pathologies, a better focus on liver functions in the 2 sexes might be of considerable help in personalizing medicine and pharmacology for male and female needs.
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Affiliation(s)
- Adriana Maggi
- Correspondence: Adriana Maggi, PhD, Department of Pharmaceutical Sciences, University of Milan, Via Balzaretti 9, 20219 Milan, Italy.
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Reconstructing Neanderthal diet: The case for carbohydrates. J Hum Evol 2021; 162:103105. [PMID: 34923240 DOI: 10.1016/j.jhevol.2021.103105] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 10/19/2021] [Accepted: 10/20/2021] [Indexed: 12/22/2022]
Abstract
Evidence for plants rarely survives on Paleolithic sites, while animal bones and biomolecular analyses suggest animal produce was important to hominin populations, leading to the perspective that Neanderthals had a very-high-protein diet. But although individual and short-term survival is possible on a relatively low-carbohydrate diet, populations are unlikely to have thrived and reproduced without plants and the carbohydrates they provide. Today, nutritional guidelines recommend that around half the diet should be carbohydrate, while low intake is considered to compromise physical performance and successful reproduction. This is likely to have been the same for Paleolithic populations, highlighting an anomaly in that the basic physiological recommendations do not match the extensive archaeological evidence. Neanderthals had large, energy-expensive brains and led physically active lifestyles, suggesting that for optimal health they would have required high amounts of carbohydrates. To address this anomaly, we begin by outlining the essential role of carbohydrates in the human reproduction cycle and the brain and the effects on physical performance. We then evaluate the evidence for resource availability and the archaeological evidence for Neanderthal diet and investigate three ways that the anomaly between the archaeological evidence and the hypothetical dietary requirements might be explained. First, Neanderthals may have had an as yet unidentified genetic adaptation to an alternative physiological method to spare blood glucose and glycogen reserves for essential purposes. Second, they may have existed on a less-than-optimum diet and survived rather than thrived. Third, the methods used in dietary reconstruction could mask a complex combination of dietary plant and animal proportions. We end by proposing that analyses of Paleolithic diet and subsistence strategies need to be grounded in the minimum recommendations throughout the life course and that this provides a context for interpretation of the archaeological evidence from the behavioral and environmental perspectives.
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Paim da Cruz Carvalho L, Dos Santos Oliveira L, Boufleur Farinha J, Socorro Nunes de Souza S, Luiz de Brito Gomes J. Sex-related glycemic changes after intensity- and duration- matched aerobic and strength exercise sessions in type 1 diabetes: A randomized cross-sectional study. J Bodyw Mov Ther 2021; 28:418-424. [PMID: 34776172 DOI: 10.1016/j.jbmt.2021.07.028] [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: 11/13/2020] [Revised: 06/11/2021] [Accepted: 07/13/2021] [Indexed: 11/17/2022]
Abstract
PURPOSE This cross-sectional study aimed to investigate sex-related glycemic, cardiovascular, and enjoyment responses after intensity-(moderate) and duration-(30 min) matched aerobic (AE) and strength exercises sessions (SE) in type 1 diabetic (T1DM) patients. METHODS Twelve volunteers performed randomly three exercise sessions: AE, strength exercises A (SEA) and B (SEB). Heart rate, systolic and diastolic blood pressure, double product (DP) and capillary blood glucose (BG) levels were measured pre (PRE), immediately (POST-0) and 20 min (POST-20) after each exercise session. Rating of perceived exertion and enjoyment level were also measured. A generalized mixed model was used to verify responses over time (p < 0.05). Effect size (ES) was also calculated. RESULTS Men shown reduced BG levels (POST-0 and POST-20), besides presenting lower values than women in both time points after AE. BG was found reduced POST-0 (SEA and SEB) and POST-20 (SEA) in men, and POST-0 and POST-20 min (SEA) in women compared to PRE (ES was moderate, large or very large), without causing hypoglycemic episodes. However, no differences between sexes were seen concerning strength sessions. Cardiovascular parameters and enjoyment levels were similar between exercise sessions. CONCLUSIONS When aerobic and strength exercise sessions are intensity- and duration-matched, lower glucose levels are seen in men after AE, but similar values are found regarding SE. These findings suggest that sex-specific recommendations may be considered when prescribing exercise for T1DM patients.
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Palmer BF, Clegg DJ. Euglycemic Ketoacidosis as a Complication of SGLT2 Inhibitor Therapy. Clin J Am Soc Nephrol 2021; 16:1284-1291. [PMID: 33563658 PMCID: PMC8455044 DOI: 10.2215/cjn.17621120] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Sodium-glucose cotransporter-2 (SGLT2) inhibitors are drugs designed to lower plasma glucose concentration by inhibiting Na+-glucose-coupled transport in the proximal tubule. Clinical trials demonstrate these drugs have favorable effects on cardiovascular outcomes to include slowing the progression of CKD. Although most patients tolerate these drugs, a potential complication is development of ketoacidosis, often with a normal or only a minimally elevated plasma glucose concentration. Inhibition of sodium-glucose cotransporter-2 in the proximal tubule alters kidney ATP turnover so that filtered ketoacids are preferentially excreted as Na+ or K+ salts, leading to indirect loss of bicarbonate from the body and systemic acidosis under conditions of increased ketogenesis. Risk factors include reductions in insulin dose, increased insulin demand, metabolic stress, low carbohydrate intake, women, and latent autoimmune diabetes of adulthood. The lack of hyperglycemia and nonspecific symptoms of ketoacidosis can lead to delays in diagnosis. Treatment strategies and various precautions are discussed that can decrease the likelihood of this complication.
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Affiliation(s)
- Biff F. Palmer
- Division of Nephrology, Department of Medicine, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Deborah J. Clegg
- Associate Dean for Research, College of Nursing and Health Professionals, Drexel University, Philadelphia, Pennsylvania
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Xiong L, Pei J, Chu M, Wu X, Kalwar Q, Yan P, Guo X. Fat Deposition in the Muscle of Female and Male Yak and the Correlation of Yak Meat Quality with Fat. Animals (Basel) 2021; 11:ani11072142. [PMID: 34359275 PMCID: PMC8300776 DOI: 10.3390/ani11072142] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/13/2021] [Accepted: 07/18/2021] [Indexed: 02/06/2023] Open
Abstract
This study aimed to explore the differences in fat deposition between female (FYs) and male yaks (MYs). Compared with MYs, the tenderness, L*, marbling, absolute content of fat, and most fatty acids (FAs) of longissimus dorsi (LD) in FYs were higher or better (p < 0.05), whereas the relative content of polyunsaturated fatty acids (PUFAs) and n-3 PUFAs were lower (p < 0.01). The absolute content of fat, C18:0, cis-C18:2, cis-C18:1, and C24:0 were positively correlated with L*45 min, b*24 h, tenderness, and marbling score of LD in FYs and MYs (p < 0.05), respectively. LPL, FATP2, ELOVL6, HADH, HACD, and PLINS genes play a crucial role in improving the marbling score and tenderness of yak meat. The results of gene expression and protein synthesis showed the effect of gender to FA biosynthesis, FA transport, lipolysis, and FA oxidation in the adipose tissue of yak was realized by the expressions of ME1, SCD, ACSL5, LPL, FABP1, PLIN4, and PLIN2 in peroxisome proliferators-activated receptor (PPAR) signaling. This study established a theoretical basis for the improvement of the meat quality of yak and molecular breeding.
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Affiliation(s)
- Lin Xiong
- Animal Science Department, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; (L.X.); (J.P.); (M.C.); (X.W.)
- Key Laboratory for Yak Genetics, Breeding, and Reproduction Engineering of Gansu Province, Lanzhou 730050, China
| | - Jie Pei
- Animal Science Department, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; (L.X.); (J.P.); (M.C.); (X.W.)
- Key Laboratory for Yak Genetics, Breeding, and Reproduction Engineering of Gansu Province, Lanzhou 730050, China
| | - Min Chu
- Animal Science Department, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; (L.X.); (J.P.); (M.C.); (X.W.)
- Key Laboratory for Yak Genetics, Breeding, and Reproduction Engineering of Gansu Province, Lanzhou 730050, China
| | - Xiaoyun Wu
- Animal Science Department, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; (L.X.); (J.P.); (M.C.); (X.W.)
- Key Laboratory for Yak Genetics, Breeding, and Reproduction Engineering of Gansu Province, Lanzhou 730050, China
| | - Qudratullah Kalwar
- Department of Animal Reproduction, Shaheed Benazir Bhutto University of Veterinary and Animal Sciences, Sakrand 67210, Pakistan;
| | - Ping Yan
- Animal Science Department, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; (L.X.); (J.P.); (M.C.); (X.W.)
- Key Laboratory for Yak Genetics, Breeding, and Reproduction Engineering of Gansu Province, Lanzhou 730050, China
- Correspondence: (P.Y.); (X.G.); Tel.: +86-0931-2115288 (P.Y.); +86-0931-2115271 (X.G.)
| | - Xian Guo
- Animal Science Department, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; (L.X.); (J.P.); (M.C.); (X.W.)
- Key Laboratory for Yak Genetics, Breeding, and Reproduction Engineering of Gansu Province, Lanzhou 730050, China
- Correspondence: (P.Y.); (X.G.); Tel.: +86-0931-2115288 (P.Y.); +86-0931-2115271 (X.G.)
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Palmer BF, Clegg DJ. Starvation Ketosis and the Kidney. Am J Nephrol 2021; 52:467-478. [PMID: 34350876 DOI: 10.1159/000517305] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 05/14/2021] [Indexed: 02/03/2023]
Abstract
BACKGROUND The remarkable ability of the body to adapt to long-term starvation has been critical for survival of primitive man. An appreciation of these processes can provide the clinician better insight into many clinical conditions characterized by ketoacidosis. SUMMARY The body adapts to long-term fasting by conserving nitrogen, as the brain increasingly utilizes keto acids, sparing the need for glucose. This shift in fuel utilization decreases the need for mobilization of amino acids from the muscle for purposes of gluconeogenesis. Loss of urinary nitrogen is initially in the form of urea when hepatic gluconeogenesis is dominant and later as ammonia reflecting increased glutamine uptake by the kidney. The carbon skeleton of glutamine is utilized for glucose production and regeneration of consumed HCO3-. The replacement of urea with NH4+ provides the osmoles needed for urine flow and waste product excretion. Over time, the urinary loss of nitrogen is minimized as kidney uptake of filtered ketone bodies becomes more complete. Adjustments in urine Na+ serve to minimize kidney K+ wasting and, along with changes in urine pH, minimize the likelihood of uric acid precipitation. There is a sexual dimorphism in response to starvation. Key Message: Ketoacidosis is a major feature of common clinical conditions to include diabetic ketoacidosis, alcoholic ketoacidosis, salicylate intoxication, SGLT2 inhibitor therapy, and calorie sufficient but carbohydrate-restricted diets. Familiarity with the pathophysiology and metabolic consequences of ketogenesis is critical, given the potential for the clinician to encounter one of these conditions.
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Affiliation(s)
- Biff F Palmer
- Division of Nephrology, Department of Medicine, University of Texas Southwestern Medical Center, El Paso, Texas, USA
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Inglis A, Ubungen R, Farooq S, Mata P, Thiam J, Saleh S, Shibin S, Al-Mohanna FA, Collison KS. Strain-based and sex-biased differences in adrenal and pancreatic gene expression between KK/HlJ and C57BL/6 J mice. BMC Genomics 2021; 22:180. [PMID: 33711921 PMCID: PMC7953684 DOI: 10.1186/s12864-021-07495-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 02/26/2021] [Indexed: 11/15/2022] Open
Abstract
Background The ever-increasing prevalence of diabetes and associated comorbidities serves to highlight the necessity of biologically relevant small-animal models to investigate its etiology, pathology and treatment. Although the C57BL/6 J model is amongst the most widely used mouse model due to its susceptibility to diet-induced obesity (DIO), there are a number of limitations namely [1] that unambiguous fasting hyperglycemia can only be achieved via dietary manipulation and/or chemical ablation of the pancreatic beta cells. [2] Heterogeneity in the obesogenic effects of hypercaloric feeding has been noted, together with sex-dependent differences, with males being more responsive. The KK mouse strain has been used to study aspects of the metabolic syndrome and prediabetes. We recently conducted a study which characterized the differences in male and female glucocentric parameters between the KK/HlJ and C57BL/6 J strains as well as diabetes-related behavioral differences (Inglis et al. 2019). In the present study, we further characterize these models by examining strain- and sex-dependent differences in pancreatic and adrenal gene expression using Affymetrix microarray together with endocrine-associated serum analysis. Results In addition to strain-associated differences in insulin tolerance, we found significant elevations in KK/HlJ mouse serum leptin, insulin and aldosterone. Additionally, glucagon and corticosterone were elevated in female mice of both strains. Using 2-factor ANOVA and a significance level set at 0.05, we identified 10,269 pancreatic and 10,338 adrenal genes with an intensity cut-off of ≥2.0 for all 4 experimental groups. In the pancreas, gene expression upregulated in the KK/HlJ strain related to increased insulin secretory granule biofunction and pancreatic hyperplasia, whereas ontology of upregulated adrenal differentially expressed genes (DEGs) related to cell signaling and neurotransmission. We established a network of functionally related DEGs commonly upregulated in both endocrine tissues of KK/HlJ mice which included the genes coding for endocrine secretory vesicle biogenesis and regulation: PCSK2, PCSK1N, SCG5, PTPRN, CHGB and APLP1. We also identified genes with sex-biased expression common to both strains and tissues including the paternally expressed imprint gene neuronatin. Conclusion Our novel results have further characterized the commonalities and diversities of pancreatic and adrenal gene expression between the KK/HlJ and C57BL/6 J strains as well as differences in serum markers of endocrine physiology. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-021-07495-4.
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Affiliation(s)
- Angela Inglis
- Department of Cell Biology, King Faisal Specialist Hospital & Research Centre, PO BOX 3354, Riyadh, 11211, Saudi Arabia
| | - Rosario Ubungen
- Department of Cell Biology, King Faisal Specialist Hospital & Research Centre, PO BOX 3354, Riyadh, 11211, Saudi Arabia
| | - Sarah Farooq
- Department of Cell Biology, King Faisal Specialist Hospital & Research Centre, PO BOX 3354, Riyadh, 11211, Saudi Arabia
| | - Princess Mata
- Department of Cell Biology, King Faisal Specialist Hospital & Research Centre, PO BOX 3354, Riyadh, 11211, Saudi Arabia
| | - Jennifer Thiam
- Department of Cell Biology, King Faisal Specialist Hospital & Research Centre, PO BOX 3354, Riyadh, 11211, Saudi Arabia
| | - Soad Saleh
- Department of Cell Biology, King Faisal Specialist Hospital & Research Centre, PO BOX 3354, Riyadh, 11211, Saudi Arabia
| | - Sherin Shibin
- Department of Cell Biology, King Faisal Specialist Hospital & Research Centre, PO BOX 3354, Riyadh, 11211, Saudi Arabia
| | - Futwan A Al-Mohanna
- Department of Cell Biology, King Faisal Specialist Hospital & Research Centre, PO BOX 3354, Riyadh, 11211, Saudi Arabia
| | - Kate S Collison
- Department of Cell Biology, King Faisal Specialist Hospital & Research Centre, PO BOX 3354, Riyadh, 11211, Saudi Arabia.
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Calamita G, Delporte C. Involvement of aquaglyceroporins in energy metabolism in health and disease. Biochimie 2021; 188:20-34. [PMID: 33689852 DOI: 10.1016/j.biochi.2021.03.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/23/2021] [Accepted: 03/01/2021] [Indexed: 11/27/2022]
Abstract
Aquaglyceroporins are a group of the aquaporin (AQP) family of transmembrane water channels. While AQPs facilitate the passage of water, small solutes, and gases across biological membranes, aquaglyceroporins allow passage of water, glycerol, urea and some other solutes. Thanks to their glycerol permeability, aquaglyceroporins are involved in energy homeostasis. This review provides an overview of what is currently known concerning the functional implication and control of aquaglyceroporins in tissues involved in energy metabolism, i.e. liver, adipose tissue and endocrine pancreas. The expression, role and (dys)regulation of aquaglyceroporins in disorders affecting energy metabolism, and the potential relevance of aquaglyceroporins as drug targets to treat the alterations of the energy balance is also addressed.
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Affiliation(s)
- Giuseppe Calamita
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari "Aldo Moro", Bari, Italy
| | - Christine Delporte
- Laboratory of Pathophysiological and Nutritional Biochemistry, Université Libre de Bruxelles, Brussels, Belgium.
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Ortiz-Huidobro RI, Velasco M, Larqué C, Escalona R, Hiriart M. Molecular Insulin Actions Are Sexually Dimorphic in Lipid Metabolism. Front Endocrinol (Lausanne) 2021; 12:690484. [PMID: 34220716 PMCID: PMC8251559 DOI: 10.3389/fendo.2021.690484] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Accepted: 05/31/2021] [Indexed: 12/14/2022] Open
Abstract
The increment in energy-dense food and low physical activity has contributed to the current obesity pandemic, which is more prevalent in women than in men. Insulin is an anabolic hormone that regulates the metabolism of lipids, carbohydrates, and proteins in adipose tissue, liver, and skeletal muscle. During obesity, nutrient storage capacity is dysregulated due to a reduced insulin action on its target organs, producing insulin resistance, an early marker of metabolic dysfunction. Insulin resistance in adipose tissue is central in metabolic diseases due to the critical role that this tissue plays in energy homeostasis. We focused on sexual dimorphism on the molecular mechanisms of insulin actions and their relationship with the physiology and pathophysiology of adipose tissue. Until recently, most of the physiological and pharmacological studies were done in males without considering sexual dimorphism, which is relevant. There is ample clinical and epidemiological evidence of its contribution to the establishment and progression of metabolic diseases. Sexual dimorphism is a critical and often overlooked factor that should be considered in design of sex-targeted therapeutic strategies and public health policies to address obesity and diabetes.
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Affiliation(s)
- Rosa Isela Ortiz-Huidobro
- Neurosciences Division, Department of Cognitive Neuroscience, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Myrian Velasco
- Neurosciences Division, Department of Cognitive Neuroscience, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Carlos Larqué
- Department of Embryology and Genetics, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Rene Escalona
- Department of Embryology and Genetics, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Marcia Hiriart
- Neurosciences Division, Department of Cognitive Neuroscience, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
- *Correspondence: Marcia Hiriart,
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Boschetti D, Muller CR, Américo ALV, Vecchiatto B, Martucci LF, Pereira RO, Oliveira CP, Fiorino P, Evangelista FS, Azevedo-Martins AK. Aerobic Physical Exercise Improves Exercise Tolerance and Fasting Glycemia Independent of Body Weight Change in Obese Females. Front Endocrinol (Lausanne) 2021; 12:772914. [PMID: 34970223 PMCID: PMC8713970 DOI: 10.3389/fendo.2021.772914] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 11/18/2021] [Indexed: 12/15/2022] Open
Abstract
Obesity is associated with increased risk of several chronic diseases and the loss of disease-free years, which has increased the focus of much research for the discovery of therapy to combat it. Under healthy conditions, women tend to store more fat in subcutaneous deposits. However, this sexual dimorphism tends to be lost in the presence of comorbidities, such as type 2 diabetes mellitus (T2DM). Aerobic physical exercise (APE) has been applied in the management of obesity, however, is still necessary to better understand the effects of APE in obese female. Thus, we investigated the effect of APE on body weight, adiposity, exercise tolerance and glucose metabolism in female ob/ob mice. Eight-weeks-old female wild-type C57BL/6J and leptin-deficient ob/ob mice (Lepob) were distributed into three groups: wild-type sedentary group (Wt; n = 6), leptin-deficient sedentary group (LepobS; n = 5) and leptin-deficient trained group (LepobT; n = 8). The LepobT mice were subjected to 8 weeks of aerobic physical exercise (APE) at 60% of the maximum velocity achieved in the running capacity test. The APE had no effect in attenuating body weight gain, and did not reduce subcutaneous and retroperitoneal white adipose tissue (SC-WAT and RP-WAT, respectively) and interscapular brown adipose tissue (iBAT) weights. The APE neither improved glucose intolerance nor insulin resistance in the LepobT group. Also, the APE did not reduce the diameter or the area of RP-WAT adipocytes, but the APE reduced the diameter and the area of SC-WAT adipocytes, which was associated with lower fasting glycemia and islet/pancreas area ratio in the LepobT group. In addition, the APE increased exercise tolerance and this response was also associated with lower fasting glycemia in the LepobT group. In conclusion, starting APE at a later age with a more severe degree of obesity did not attenuate the excessive body weight gain, however the APE promoted benefits that can improve the female health, and for this reason it should be recommended as a non-pharmacological therapy for obesity.
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Affiliation(s)
- Daniela Boschetti
- School of Arts, Science and Humanities, University of Sao Paulo, São Paulo, Brazil
| | - Cynthia R. Muller
- Department of Bioengineering, University of California San Diego, La Jolla, San Diego, CA, United States
- Department of Experimental Pathophysiology, Faculty of Medicine, University of São Paulo, São Paulo, Brazil
| | - Anna Laura V. Américo
- Department of Experimental Pathophysiology, Faculty of Medicine, University of São Paulo, São Paulo, Brazil
| | - Bruno Vecchiatto
- School of Arts, Science and Humanities, University of Sao Paulo, São Paulo, Brazil
- Department of Experimental Pathophysiology, Faculty of Medicine, University of São Paulo, São Paulo, Brazil
| | - Luiz Felipe Martucci
- Department of Experimental Pathophysiology, Faculty of Medicine, University of São Paulo, São Paulo, Brazil
| | - Renata O. Pereira
- Translational Medicine Division, Department of Medicine, Federal University of São Paulo, Sao Paulo, Brazil
| | - Cláudia P. Oliveira
- Division of Gastroenterology and Hepatology, Department of Gastroenterology (LIM 07), Faculty of Medicine, University of São Paulo, São Paulo, Brazil
| | - Patricia Fiorino
- Renal, Cardiovascular and Metabolic Physiopharmacology Laboratory, Health and Biological Science Center, Mackenzie Presbyterian University, São Paulo, Brazil
| | | | - Anna Karenina Azevedo-Martins
- School of Arts, Science and Humanities, University of Sao Paulo, São Paulo, Brazil
- *Correspondence: Anna Karenina Azevedo-Martins,
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33
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Teng YC, Wang JY, Chi YH, Tsai TF. Exercise and the Cisd2 Prolongevity Gene: Two Promising Strategies to Delay the Aging of Skeletal Muscle. Int J Mol Sci 2020; 21:ijms21239059. [PMID: 33260577 PMCID: PMC7731423 DOI: 10.3390/ijms21239059] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 11/26/2020] [Accepted: 11/27/2020] [Indexed: 12/17/2022] Open
Abstract
Aging is an evolutionally conserved process that limits life activity. Cellular aging is the result of accumulated genetic damage, epigenetic damage and molecular exhaustion, as well as altered inter-cellular communication; these lead to impaired organ function and increased vulnerability to death. Skeletal muscle constitutes ~40% of the human body’s mass. In addition to maintaining skeletal structure and allowing locomotion, which enables essential daily activities to be completed, skeletal muscle also plays major roles in thermogenesis, metabolism and the functioning of the endocrine system. Unlike many other organs that have a defined size once adulthood is reached, skeletal muscle is able to alter its structural and functional properties in response to changes in environmental conditions. Muscle mass usually remains stable during early life; however, it begins to decline at a rate of ~1% year in men and ~0.5% in women after the age of 50 years. On the other hand, different exercise training regimens are able to restore muscle homeostasis at the molecular, cellular and organismal levels, thereby improving systemic health. Here we give an overview of the molecular factors that contribute to lifespan and healthspan, and discuss the effects of the longevity gene Cisd2 and middle-to-old age exercise on muscle metabolism and changes in the muscle transcriptome in mice during very old age.
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Affiliation(s)
- Yuan-Chi Teng
- Department of Life Sciences and Institute of Genome Sciences, National Yang-Ming University, Taipei 11221, Taiwan;
| | - Jing-Ya Wang
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan 35053, Taiwan;
| | - Ya-Hui Chi
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan 35053, Taiwan;
- Correspondence: (Y.-H.C.); (T.-F.T.); Tel.: +886-37-206166 (ext. 35718) (Y.-H.C.); +886-2-28267293 (T.-F.T.); Fax: +886-2-28280872 (T.-F.T.)
| | - Ting-Fen Tsai
- Department of Life Sciences and Institute of Genome Sciences, National Yang-Ming University, Taipei 11221, Taiwan;
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan 35053, Taiwan;
- Institute of Molecular and Genomic Medicine, National Health Research Institutes, Zhunan 35053, Taiwan
- Aging and Health Research Center, National Yang-Ming University, Taipei 11221, Taiwan
- Correspondence: (Y.-H.C.); (T.-F.T.); Tel.: +886-37-206166 (ext. 35718) (Y.-H.C.); +886-2-28267293 (T.-F.T.); Fax: +886-2-28280872 (T.-F.T.)
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34
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Sex differences in health and disease: A review of biological sex differences relevant to cancer with a spotlight on glioma. Cancer Lett 2020; 498:178-187. [PMID: 33130315 DOI: 10.1016/j.canlet.2020.07.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 07/16/2020] [Accepted: 07/24/2020] [Indexed: 12/12/2022]
Abstract
The influence of biological sex differences on human health and disease, while being increasingly recognized, has long been underappreciated and underexplored. While humans of all sexes are more alike than different, there is evidence for sex differences in the most basic aspects of human biology and these differences have consequences for the etiology and pathophysiology of many diseases. In a disease like cancer, these consequences manifest in the sex biases in incidence and outcome of many cancer types. The ability to deliver precise, targeted therapies to complex cancer cases is limited by our current understanding of the underlying sex differences. Gaining a better understanding of the implications and interplay of sex differences in diseases like cancer will thus be informative for clinical practice and biological research. Here we review the evidence for a broad array of biological sex differences in humans and discuss how these differences may relate to observed sex differences in various diseases, including many cancers and specifically glioblastoma. We focus on areas of human biology that play vital roles in healthy and disease states, including metabolism, development, hormones, and the immune system, and emphasize that the intersection of sex differences in these areas should not go overlooked. We further propose that mathematical approaches can be useful for exploring the extent to which sex differences affect disease outcomes and accounting for those in the development of therapeutic strategies.
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35
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Ducret V, Videlier M, Moureaux C, Bonneaud C, Herrel A. Do female frogs have higher resting metabolic rates than males? A case study with
Xenopus allofraseri. J Zool (1987) 2020. [DOI: 10.1111/jzo.12820] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- V. Ducret
- Département Adaptations du Vivant UMR 7179 C.N.R.S/M.N.H.N. Paris France
| | - M. Videlier
- Functional Ecology Laboratory Department of Biology University of Ottawa Ottawa ON Canada
| | - C. Moureaux
- Département Adaptations du Vivant UMR 7179 C.N.R.S/M.N.H.N. Paris France
| | - C. Bonneaud
- Centre for Ecology & Conservation College of Life and Environmental Sciences University of Exeter Penryn UK
| | - A. Herrel
- Département Adaptations du Vivant UMR 7179 C.N.R.S/M.N.H.N. Paris France
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36
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Tricarico R, Nicolas E, Hall MJ, Golemis EA. X- and Y-Linked Chromatin-Modifying Genes as Regulators of Sex-Specific Cancer Incidence and Prognosis. Clin Cancer Res 2020; 26:5567-5578. [PMID: 32732223 DOI: 10.1158/1078-0432.ccr-20-1741] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 06/24/2020] [Accepted: 07/27/2020] [Indexed: 12/15/2022]
Abstract
Biological sex profoundly conditions organismal development and physiology, imposing wide-ranging effects on cell signaling, metabolism, and immune response. These effects arise from sex-specified differences in hormonal exposure, and from intrinsic genetic and epigenetic differences associated with the presence of an XX versus XY chromosomal complement. In addition, biological sex is now recognized to be a determinant of the incidence, presentation, and therapeutic response of multiple forms of cancer, including cancers not specifically associated with male or female anatomy. Although multiple factors contribute to sex-based differences in cancer, a growing body of research emphasizes a role for differential activity of X- and Y-linked tumor-suppressor genes in males and females. Among these, the X-linked KDM6A/UTX and KDM5C/JARID1C/SMCX, and their Y-linked paralogs UTY/KDM6C and KDM5D/JARID1D/SMCY encode lysine demethylases. These epigenetic modulators profoundly influence gene expression, based on enzymatic activity in demethylating H3K27me3 and H3K4me3, and nonenzymatic scaffolding roles for large complexes that open and close chromatin for transcription. In a growing number of cases, mutations affecting these proteins have been recognized to strongly influence cancer risk, prognosis, and response to specific therapies. However, sex-specific patterns of mutation, expression, and activity of these genes, coupled with tissue-specific requirement for their function as tumor suppressors, together exemplify the complex relationship between sex and cancer vulnerabilities. In this review, we summarize and discuss the current state of the literature on the roles of these proteins in contributing to sex bias in cancer, and the status of clinical agents relevant to their function.
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Affiliation(s)
- Rossella Tricarico
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania. .,Department of Biology and Biotechnology, University of Pavia, Pavia, Italy
| | - Emmanuelle Nicolas
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Michael J Hall
- Cancer Prevention and Control Program, Department of Clinical Genetics, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Erica A Golemis
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania.
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37
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Extending the Overnight Fast: Sex Differences in Acute Metabolic Responses to Breakfast. Nutrients 2020; 12:nu12082173. [PMID: 32707917 PMCID: PMC7469038 DOI: 10.3390/nu12082173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/14/2020] [Accepted: 07/18/2020] [Indexed: 11/17/2022] Open
Abstract
Fasting for over 24 h is associated with worsening glucose tolerance, but the effect of extending the overnight fast period (a form of time-restricted feeding) on acute metabolic responses and insulin sensitivity is unclear. The aim of this pilot study was to determine the acute impact of an increased fasting period on postprandial glycaemia, insulinemia, and acute insulin sensitivity responses to a standard meal. Twenty-four lean, young, healthy adults (12 males, 12 females) consumed a standard breakfast after an overnight fast of 12, 14, and 16 h. Each fast duration was repeated on three separate occasions (3 × 3) in random order. Postprandial glucose and insulin responses were measured at regular intervals over 2 h and quantified as incremental area under the curve (iAUC). Insulin sensitivity was determined by homeostatic modelling assessment (HOMA). After 2 h, ad libitum food intake at a buffet meal was recorded. In females, but not males, insulin sensitivity improved (HOMA%S +35%, p = 0.016, marginally significant) with longer fast duration (16 h vs. 12 h), but paradoxically, postprandial glycaemia was higher (glucose iAUC +37%, p = 0.002). Overall, males showed no differences in glucose or insulin homeostasis. Both sexes consumed more energy (+28%) at the subsequent meal (16 h vs. 12 h). Delaying the first meal of the day by 4 h by extending the fasting period may have adverse metabolic effects in young, healthy, adult females, but not males.
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38
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Sujkowski A, Gretzinger A, Soave N, Todi SV, Wessells R. Alpha- and beta-adrenergic octopamine receptors in muscle and heart are required for Drosophila exercise adaptations. PLoS Genet 2020; 16:e1008778. [PMID: 32579604 PMCID: PMC7351206 DOI: 10.1371/journal.pgen.1008778] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 07/10/2020] [Accepted: 04/15/2020] [Indexed: 01/04/2023] Open
Abstract
Endurance exercise has broadly protective effects across organisms, increasing metabolic fitness and reducing incidence of several age-related diseases. Drosophila has emerged as a useful model for studying changes induced by chronic endurance exercise, as exercising flies experience improvements to various aspects of fitness at the cellular, organ and organismal level. The activity of octopaminergic neurons is sufficient to induce the conserved cellular and physiological changes seen following endurance training. All 4 octopamine receptors are required in at least one target tissue, but only one, Octβ1R, is required for all of them. Here, we perform tissue- and adult-specific knockdown of alpha- and beta-adrenergic octopamine receptors in several target tissues. We find that reduced expression of Octβ1R in adult muscles abolishes exercise-induced improvements in endurance, climbing speed, flight, cardiac performance and fat-body catabolism in male Drosophila. Importantly, Octβ1R and OAMB expression in the heart is also required cell-nonautonomously for adaptations in other tissues, such as skeletal muscles in legs and adult fat body. These findings indicate that activation of distinct octopamine receptors in skeletal and cardiac muscle are required for Drosophila exercise adaptations, and suggest that cell non-autonomous factors downstream of octopaminergic activation play a key role.
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Affiliation(s)
- Alyson Sujkowski
- Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Anna Gretzinger
- Department of Pharmacology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Nicolette Soave
- Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Sokol V. Todi
- Department of Pharmacology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Robert Wessells
- Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
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39
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Lonardo A, Suzuki A. Sexual Dimorphism of NAFLD in Adults. Focus on Clinical Aspects and Implications for Practice and Translational Research. J Clin Med 2020; 9:jcm9051278. [PMID: 32354182 PMCID: PMC7288212 DOI: 10.3390/jcm9051278] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 04/23/2020] [Accepted: 04/24/2020] [Indexed: 02/07/2023] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) embraces the clinico-pathological consequences of hepatic lipotoxicity and is a major public health problem globally. Sexual dimorphism is a definite feature of most human diseases but, under this aspect, NAFLD lags behind other medical fields. Here, we aim at summarizing and critically discussing the most prominent sex differences and gaps in NAFLD in humans, with emphasis on those aspects which are relevant for clinical practice and translational research. Sexual dimorphism of NAFLD is covered with references to the following areas: disease prevalence and risk factors, pathophysiology, comorbidities, natural course and complications. Finally, we also discuss selected gender differences and whether sex-specific lifestyle changes should be adopted to contrast NAFLD in men and women.
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Affiliation(s)
- Amedeo Lonardo
- Operating Unit Metabolic Syndrome, Azienda Ospedaliero-Universitaria di Modena, Ospedale Civile di Baggiovara, 41126 Baggiovara MO, Italy
- Correspondence:
| | - Ayako Suzuki
- Division of Gastroenterology, Durham VA Medical Center and Duke University Medical Center, Durham, NC 27705, USA;
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40
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Rubin JB, Lagas JS, Broestl L, Sponagel J, Rockwell N, Rhee G, Rosen SF, Chen S, Klein RS, Imoukhuede P, Luo J. Sex differences in cancer mechanisms. Biol Sex Differ 2020; 11:17. [PMID: 32295632 PMCID: PMC7161126 DOI: 10.1186/s13293-020-00291-x] [Citation(s) in RCA: 149] [Impact Index Per Article: 37.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Accepted: 03/18/2020] [Indexed: 02/07/2023] Open
Abstract
We now know that cancer is many different diseases, with great variation even within a single histological subtype. With the current emphasis on developing personalized approaches to cancer treatment, it is astonishing that we have not yet systematically incorporated the biology of sex differences into our paradigms for laboratory and clinical cancer research. While some sex differences in cancer arise through the actions of circulating sex hormones, other sex differences are independent of estrogen, testosterone, or progesterone levels. Instead, these differences are the result of sexual differentiation, a process that involves genetic and epigenetic mechanisms, in addition to acute sex hormone actions. Sexual differentiation begins with fertilization and continues beyond menopause. It affects virtually every body system, resulting in marked sex differences in such areas as growth, lifespan, metabolism, and immunity, all of which can impact on cancer progression, treatment response, and survival. These organismal level differences have correlates at the cellular level, and thus, males and females can fundamentally differ in their protections and vulnerabilities to cancer, from cellular transformation through all stages of progression, spread, and response to treatment. Our goal in this review is to cover some of the robust sex differences that exist in core cancer pathways and to make the case for inclusion of sex as a biological variable in all laboratory and clinical cancer research. We finish with a discussion of lab- and clinic-based experimental design that should be used when testing whether sex matters and the appropriate statistical models to apply in data analysis for rigorous evaluations of potential sex effects. It is our goal to facilitate the evaluation of sex differences in cancer in order to improve outcomes for all patients.
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Affiliation(s)
- Joshua B Rubin
- Department of Pediatrics, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, MO, 63110, USA.
- Department of Neuroscience, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, MO, 63110, USA.
| | - Joseph S Lagas
- Department of Pediatrics, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, MO, 63110, USA
| | - Lauren Broestl
- Department of Pediatrics, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, MO, 63110, USA
| | - Jasmin Sponagel
- Department of Pediatrics, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, MO, 63110, USA
| | - Nathan Rockwell
- Department of Pediatrics, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, MO, 63110, USA
| | - Gina Rhee
- Department of Pediatrics, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, MO, 63110, USA
| | - Sarah F Rosen
- Department of Medicine, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, MO, 63110, USA
| | - Si Chen
- Department of Biomedical Engineering, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, MO, 63110, USA
| | - Robyn S Klein
- Department of Neuroscience, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, MO, 63110, USA
- Department of Medicine, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, MO, 63110, USA
| | - Princess Imoukhuede
- Department of Biomedical Engineering, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, MO, 63110, USA
| | - Jingqin Luo
- Department of Surgery, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, MO, 63110, USA
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41
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Freire T, Senior AM, Perks R, Pulpitel T, Clark X, Brandon AE, Wahl D, Hatchwell L, Le Couteur DG, Cooney GJ, Larance M, Simpson SJ, Solon-Biet SM. Sex-specific metabolic responses to 6 hours of fasting during the active phase in young mice. J Physiol 2020; 598:2081-2092. [PMID: 32198893 DOI: 10.1113/jp278806] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 03/04/2020] [Indexed: 02/06/2023] Open
Abstract
KEY POINTS Night time/active phase food restriction for 6 h impaired glucose intolerance in young male and female mice. Females displayed increased capacity for lipogenesis and triglyceride storage in response to a short daily fast. Females had lower fasting insulin levels and an increased potential for utilizing fat for energy through β-oxidation compared to males. The need for the inclusion of both sexes, and the treatment of sex as an independent variable, is emphasized within the context of this fasting regime. ABSTRACT There is growing interest in understanding the mechanistic significance and benefits of fasting physiology in combating obesity. Increasing the fasting phase of a normal day can promote restoration and repair mechanisms that occur during the post-absorptive period. Most studies exploring the effect of restricting food access on mitigating obesity have done so with a large bias towards the use of male mice. Here, we disentangle the roles of sex, food intake and food withdrawal in the response to a short-term daily fasting intervention, in which food was removed for 6 h in the dark/active phase of young, 8-week-old mice. We showed that the removal of food during the dark phase impaired glucose tolerance in males and females, possibly due to the circadian disruption induced by this feeding protocol. Although both sexes demonstrated similar patterns of food intake, body composition and various metabolic markers, there were clear sex differences in the magnitude and extent of these responses. While females displayed enhanced capacity for lipogenesis and triglyceride storage, they also had low fasting insulin levels and an increased potential for utilizing available energy sources such as fat for energy through β-oxidation. Our results highlight the intrinsic biological and metabolic disparities between male and female mice, emphasizing the growing need for the inclusion of both sexes in scientific research. Furthermore, our results illustrate sex-specific metabolic pathways that regulate lipogenesis, obesity and overall metabolic health.
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Affiliation(s)
- Therese Freire
- Charles Perkins Centre, University of Sydney, Sydney, NSW, Australia.,School of Life and Environmental Sciences, Faculty of Science, University of Sydney, Sydney, NSW, Australia
| | - Alistair M Senior
- Charles Perkins Centre, University of Sydney, Sydney, NSW, Australia.,School of Life and Environmental Sciences, Faculty of Science, University of Sydney, Sydney, NSW, Australia
| | - Ruth Perks
- Charles Perkins Centre, University of Sydney, Sydney, NSW, Australia
| | - Tamara Pulpitel
- Charles Perkins Centre, University of Sydney, Sydney, NSW, Australia.,School of Life and Environmental Sciences, Faculty of Science, University of Sydney, Sydney, NSW, Australia
| | - Ximonie Clark
- Charles Perkins Centre, University of Sydney, Sydney, NSW, Australia.,School of Life and Environmental Sciences, Faculty of Science, University of Sydney, Sydney, NSW, Australia
| | - Amanda E Brandon
- Charles Perkins Centre, University of Sydney, Sydney, NSW, Australia.,School of Medical Sciences, Faculty of Health and Medicine, University of Sydney, Sydney, NSW, Australia
| | - Devin Wahl
- Charles Perkins Centre, University of Sydney, Sydney, NSW, Australia.,School of Medical Sciences, Faculty of Health and Medicine, University of Sydney, Sydney, NSW, Australia
| | - Luke Hatchwell
- Charles Perkins Centre, University of Sydney, Sydney, NSW, Australia.,School of Life and Environmental Sciences, Faculty of Science, University of Sydney, Sydney, NSW, Australia
| | - David G Le Couteur
- Charles Perkins Centre, University of Sydney, Sydney, NSW, Australia.,Ageing and Alzheimer's Institute and Centre for Education and Research on Ageing, Concord Hospital, Concord, NSW, Australia
| | - Gregory J Cooney
- Charles Perkins Centre, University of Sydney, Sydney, NSW, Australia.,School of Medical Sciences, Faculty of Health and Medicine, University of Sydney, Sydney, NSW, Australia
| | - Mark Larance
- Charles Perkins Centre, University of Sydney, Sydney, NSW, Australia.,School of Life and Environmental Sciences, Faculty of Science, University of Sydney, Sydney, NSW, Australia
| | - Stephen J Simpson
- Charles Perkins Centre, University of Sydney, Sydney, NSW, Australia.,School of Life and Environmental Sciences, Faculty of Science, University of Sydney, Sydney, NSW, Australia
| | - Samantha M Solon-Biet
- Charles Perkins Centre, University of Sydney, Sydney, NSW, Australia.,School of Life and Environmental Sciences, Faculty of Science, University of Sydney, Sydney, NSW, Australia.,School of Medical Sciences, Faculty of Health and Medicine, University of Sydney, Sydney, NSW, Australia
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42
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Cockcroft EJ, Narendran P, Andrews RC. Exercise‐induced hypoglycaemia in type 1 diabetes. Exp Physiol 2020; 105:590-599. [DOI: 10.1113/ep088219] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 11/26/2019] [Indexed: 12/30/2022]
Affiliation(s)
| | - P. Narendran
- Department of DiabetesUniversity Hospitals Birmingham NHS Foundation Trust Birmingham UK
- Institute of Immunology and ImmunotherapyUniversity of Birmingham Birmingham UK
| | - R. C. Andrews
- University of Exeter Medical School Exeter UK
- Department of DiabetesTaunton and Somerset NHS Foundation Trust Taunton UK
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43
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Kruk J, Kotarska K, Aboul-Enein BH. Physical exercise and catecholamines response: benefits and health risk: possible mechanisms. Free Radic Res 2020; 54:105-125. [PMID: 32020819 DOI: 10.1080/10715762.2020.1726343] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Beneficial effect of regular moderate physical exercise (PE) and negative effect of severe exercise and/or overtraining as an activator of the sympathetic nervous system (SNS) have been shown in numerous aspects of human health, including reduced risk of cardiovascular disease, neurological disease, depression, and some types of cancer. Moderate-to-vigorous PE stimulates the SNS activation, releasing catecholamines (CATs) adrenaline, noradrenaline, dopamine that play an important regulatory and modulatory actions by affecting metabolic processes and the immune system. Summary of the dispersed literature in this area and explanation of the biological mechanisms operating between PE-CATs and the immune system would lead to a better understanding of the beneficial and negative effects of PE on health. This overview aimed to: demonstrate representative literature findings on the exercise released CATs levels, major functions performed by these hormones, their interactions with the immune system and their effects on carbohydrate and lipid metabolism. Also, mechanisms of cytotoxic free radicals and reactive oxygen species (ROS) generation during CATs oxidation, and molecular mechanisms of CATs response to exercise are discussed to demonstrate positive and negative on human health effects. Owing to the large body of the subject literature, we present a representative cross-section of the published studies in this area. The results show a significant role of CATs in carbohydrate and lipid metabolism, immunity and as generators of ROS, depending on PE intensity and duration. Further investigation of the PE-CATs relationship should validate CATs levels to optimize safe intensity and duration of exercise and individualize their prescription, considering CATs to be applied as markers for a dose of exercise. Also, a better understanding of the biological mechanisms is also needed.
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Affiliation(s)
- Joanna Kruk
- Faculty of Physical Culture and Health, University of Szczecin, Szczecin, Poland
| | - Katarzyna Kotarska
- Faculty of Physical Culture and Health, University of Szczecin, Szczecin, Poland
| | - Basil H Aboul-Enein
- Faculty of Public Health & Policy, London School of Hygiene & Tropical Medicine, London, UK
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Brockman NK, Sigal RJ, Kenny GP, Riddell MC, Perkins BA, Yardley JE. Sex-Related Differences in Blood Glucose Responses to Resistance Exercise in Adults With Type 1 Diabetes: A Secondary Data Analysis. Can J Diabetes 2019; 44:267-273.e1. [PMID: 31623995 DOI: 10.1016/j.jcjd.2019.08.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 06/26/2019] [Accepted: 08/07/2019] [Indexed: 01/03/2023]
Abstract
OBJECTIVES In adults with type 1 diabetes, resistance exercise (RE) is associated with more stable blood glucose (BG) levels than aerobic exercise, both during and after exercise. In individuals without diabetes, growth hormone and epinephrine responses to RE differ between the sexes. These hormones are known to affect BG levels in individuals with type 1 diabetes. In this study, we explored whether sex-related differences may exist in BG responses to RE in individuals with type 1 diabetes. METHODS A secondary data analysis was conducted on pooled data from 2 studies with identical RE protocols for individuals with type 1 diabetes (13 males, age range 16 to 63 years; 10 females, age range 19 to 45 years). The RE session consisted of 7 resistance-based exercises performed at 5 pm. Plasma glucose samples were collected before, immediately after and 1 h after exercise. Interstitial glucose levels were recorded through blinded continuous glucose monitoring 24 h before, during and 24 h after exercise. RESULTS There was a significant sex-by-time interaction (p<0.001) in plasma glucose responses to RE. Plasma glucose decreased significantly in males from 8.6±2.5 to 6.3±2.1 mmol/L (p<0.001) during exercise, whereas females experienced no significant change (7.2±1.3 to 7.3±1.3 mmol/L, p=0.999). In the 6 h after RE, males developed significantly more hypoglycemia, as measured by continuous glucose monitoring (p=0.048). CONCLUSIONS Males may have a greater risk of hypoglycemia with an acute bout of RE than females. Further research is needed to examine this phenomenon more closely, as sex-specific recommendations for preventing hypoglycemia around RE may be necessary in type 1 diabetes.
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Affiliation(s)
| | - Ronald J Sigal
- Departments of Medicine, Cardiac Sciences and Community Health Sciences, Cumming School of Medicine, Faculties of Medicine and Kinesiology, University of Calgary, Foothills Medical Centre, Calgary, Alberta, Canada
| | - Glen P Kenny
- School of Human Kinetics, University of Ottawa, Ottawa, Ontario, Canada
| | - Michael C Riddell
- School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada
| | - Bruce A Perkins
- Diabetes Clinical Research Unit, Leadership Sinai Centre for Diabetes, Sinai Health System, Toronto, Ontario, Canada
| | - Jane E Yardley
- Augustana Faculty, University of Alberta, Camrose, Alberta, Canada; Physical Activity and Diabetes Laboratory, Alberta Diabetes Institute, Li Ka Shing Centre for Health Research Innovation, Edmonton, Alberta, Canada; Faculty of Kinesiology, Sport and Recreation, University of Alberta, Edmonton, Alberta, Canada.
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45
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Yang X, Brobst D, Chan WS, Tse MCL, Herlea-Pana O, Ahuja P, Bi X, Zaw AM, Kwong ZSW, Jia WH, Zhang ZG, Zhang N, Chow SKH, Cheung WH, Louie JCY, Griffin TM, Nong W, Hui JHL, Du GH, Noh HL, Saengnipanthkul S, Chow BKC, Kim JK, Lee CW, Chan CB. Muscle-generated BDNF is a sexually dimorphic myokine that controls metabolic flexibility. Sci Signal 2019; 12:12/594/eaau1468. [PMID: 31409756 DOI: 10.1126/scisignal.aau1468] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The ability of skeletal muscle to switch between lipid and glucose oxidation for ATP production during metabolic stress is pivotal for maintaining systemic energy homeostasis, and dysregulation of this metabolic flexibility is a dominant cause of several metabolic disorders. However, the molecular mechanism that governs fuel selection in muscle is not well understood. Here, we report that brain-derived neurotrophic factor (BDNF) is a fasting-induced myokine that controls metabolic reprograming through the AMPK/CREB/PGC-1α pathway in female mice. Female mice with a muscle-specific deficiency in BDNF (MBKO mice) were unable to switch the predominant fuel source from carbohydrates to fatty acids during fasting, which reduced ATP production in muscle. Fasting-induced muscle atrophy was also compromised in female MBKO mice, likely a result of autophagy inhibition. These mutant mice displayed myofiber necrosis, weaker muscle strength, reduced locomotion, and muscle-specific insulin resistance. Together, our results show that muscle-derived BDNF facilitates metabolic adaption during nutrient scarcity in a gender-specific manner and that insufficient BDNF production in skeletal muscle promotes the development of metabolic myopathies and insulin resistance.
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Affiliation(s)
- Xiuying Yang
- Department of Physiology, University of Oklahoma Health Sciences Center, 940 Stanton L. Young Blvd., BMSB 634, Oklahoma City, OK 73104, USA.,State Key Laboratory of Bioactive Substance and Function of Natural Medicines and Beijing Key Laboratory of Drug Target and Screening Research, Institute of Materia Medica of Peking Union Medical College, Beijing 100050, China
| | - Daniel Brobst
- Department of Physiology, University of Oklahoma Health Sciences Center, 940 Stanton L. Young Blvd., BMSB 634, Oklahoma City, OK 73104, USA
| | - Wing Suen Chan
- School of Biological Sciences, The University of Hong Kong, 6N01 Kadoorie Biological Sciences Building, Pokfulam Road, Hong Kong
| | - Margaret Chui Ling Tse
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong
| | - Oana Herlea-Pana
- Department of Physiology, University of Oklahoma Health Sciences Center, 940 Stanton L. Young Blvd., BMSB 634, Oklahoma City, OK 73104, USA
| | - Palak Ahuja
- School of Biological Sciences, The University of Hong Kong, 6N01 Kadoorie Biological Sciences Building, Pokfulam Road, Hong Kong
| | - Xinyi Bi
- School of Biological Sciences, The University of Hong Kong, 6N01 Kadoorie Biological Sciences Building, Pokfulam Road, Hong Kong
| | - Aung Moe Zaw
- School of Biological Sciences, The University of Hong Kong, 6N01 Kadoorie Biological Sciences Building, Pokfulam Road, Hong Kong.,Department of Chemical Engineering, University of Waterloo, ON N2L 3G1, Canada
| | - Zara Sau Wa Kwong
- School of Biological Sciences, The University of Hong Kong, 6N01 Kadoorie Biological Sciences Building, Pokfulam Road, Hong Kong
| | - Wei-Hua Jia
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines and Beijing Key Laboratory of Drug Target and Screening Research, Institute of Materia Medica of Peking Union Medical College, Beijing 100050, China
| | - Zhong-Gou Zhang
- Department of Colorectal Cancer Oncological Surgery, Large-Scale Data Analysis Center of Cancer Precision Medicine, Cancer Hospital of Chinese Medical University, Liaoning Provincial Cancer Institute and Hospital, Shenyang 110042, China
| | - Ning Zhang
- Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, 5/F Lui Che Woo Clinical Sciences Building, Prince of Wales Hospital, Shatin, Hong Kong
| | - Simon Kwoon Ho Chow
- Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, 5/F Lui Che Woo Clinical Sciences Building, Prince of Wales Hospital, Shatin, Hong Kong
| | - Wing Hoi Cheung
- Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, 5/F Lui Che Woo Clinical Sciences Building, Prince of Wales Hospital, Shatin, Hong Kong
| | - Jimmy Chun Yu Louie
- School of Biological Sciences, The University of Hong Kong, 6N01 Kadoorie Biological Sciences Building, Pokfulam Road, Hong Kong
| | - Timothy M Griffin
- Department of Physiology, University of Oklahoma Health Sciences Center, 940 Stanton L. Young Blvd., BMSB 634, Oklahoma City, OK 73104, USA.,Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA.,Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Wenyan Nong
- School of Life Sciences, Chinese University of Hong Kong, Shatin, Hong Kong
| | - Jerome Ho Lam Hui
- School of Life Sciences, Chinese University of Hong Kong, Shatin, Hong Kong
| | - Guan-Hua Du
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines and Beijing Key Laboratory of Drug Target and Screening Research, Institute of Materia Medica of Peking Union Medical College, Beijing 100050, China
| | - Hye Lim Noh
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Suchaorn Saengnipanthkul
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Billy K C Chow
- School of Biological Sciences, The University of Hong Kong, 6N01 Kadoorie Biological Sciences Building, Pokfulam Road, Hong Kong
| | - Jason K Kim
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Chi Wai Lee
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong.
| | - Chi Bun Chan
- School of Biological Sciences, The University of Hong Kong, 6N01 Kadoorie Biological Sciences Building, Pokfulam Road, Hong Kong. .,State Key Laboratory of Pharmaceutical Biotechnology, University of Hong Kong, Hong Kong
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Guo W, Key TJ, Reeves GK. Accelerometer compared with questionnaire measures of physical activity in relation to body size and composition: a large cross-sectional analysis of UK Biobank. BMJ Open 2019; 9:e024206. [PMID: 30700478 PMCID: PMC6352868 DOI: 10.1136/bmjopen-2018-024206] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 11/23/2018] [Accepted: 12/06/2018] [Indexed: 01/11/2023] Open
Abstract
OBJECTIVES Previous studies of the association between physical activity and adiposity are largely based on physical activity and body mass index (BMI) from questionnaires, which are prone to inaccurate and biased reporting. We assessed the associations of accelerometer-measured and questionnaire-measured physical activity with BMI, waist circumference and body fat per cent measured by bioelectrical impedance and dual-energy X-ray absorptiometry (DXA). DESIGN Cross-sectional analysis of UK Biobank participants. SETTING UK Biobank assessment centres. PARTICIPANTS 78 947 UK Biobank participants (35 955 men and 42 992 women) aged 40-70 at recruitment, who had physical activity measured by both questionnaire and accelerometer. MAIN OUTCOME MEASURES BMI, waist circumference and body fat per cent measured by bioelectrical impedance. RESULTS Greater physical activity was associated with lower adiposity. Women in the top 10th of accelerometer-measured physical activity had a 4.8 (95% CI 4.6 to 5.0) kg/m2 lower BMI, 8.1% (95% CI 7.8% to 8.3%) lower body fat per cent and 11.9 (95% CI 11.4 to 12.4) cm lower waist circumference. Women in the top 10th of questionnaire-measured physical activity had a 2.5 (95% CI 2.3 to 2.7) kg/m2 lower BMI, 4.3% (95% CI 4.0% to 4.5%) lower body fat per cent and 6.4 (95% CI 5.9 to 6.9) cm lower waist circumference, compared with women in the bottom 10th. The patterns were similar in men and also similar to body fat per cent measured by DXA compared with impedance. CONCLUSION Our findings of approximately twofold stronger associations between physical activity and adiposity with objectively measured than with self-reported physical activity emphasise the need to incorporate objective measures in future studies.
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Affiliation(s)
- Wenji Guo
- Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | - Timothy J Key
- Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | - Gillian K Reeves
- Nuffield Department of Population Health, University of Oxford, Oxford, UK
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47
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Döring S, Seeßle J, Gan-Schreier H, Javaheri B, Jiao L, Cheng Y, Tuma-Kellner S, Liebisch G, Herrmann T, Stremmel W, Chamulitrat W. Elevation of blood lipids in hepatocyte-specific fatty acid transport 4-deficient mice fed with high glucose diets. Mol Genet Metab 2019; 126:30-38. [PMID: 30497809 DOI: 10.1016/j.ymgme.2018.11.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 11/12/2018] [Accepted: 11/17/2018] [Indexed: 11/20/2022]
Abstract
Fatty acid transport protein4 (FATP4) is upregulated in acquired and central obesity and its polymorphisms are associated with blood lipids and insulin resistance. Patients with FATP4 mutations and mice with global FATP4 deletion exhibit skin abnormalities characterized as ischthyosis prematurity syndrome (IPS). Cumulating data have shown that an absence of FATP4 increases the levels of cellular triglycerides (TG). However, FATP4 role and consequent lipid and TG metabolism in the hepatocyte is still elusive. Here, hepatocyte-specific FATP4 deficient (Fatp4L-/-) mice were generated. When fed with chow, these mutant mice displayed no phenotypes regarding blood lipids. However when fed low-fat/high-sugar (HS) or high-fat/high-sugar (HFS) for 12 weeks, Fatp4L-/- mice showed a significant increase of plasma TG, free fatty acids and glycerol when compared with diet-fed control mice. Interestingly, Fatp4L-/- mice under HS diet had lower body and liver weights and they were not protected from HFS-induced body weight gain and hepatic steatosis. Male mutant mice were more sensitive to HFS diet than female mutant mice. Glucose intolerance was observed only in female Fatp4L-/- mice fed with HS diet. Lipidomics analyses revealed that hepatic phospholipids were not disturbed in mutant mice under both diets. Thus, hepatic FATP4 deletion rendered an increase of blood lipids including glycerol indicating a preferential fatty-acid channeling to TG pools that are specifically available for lipolysis. Our results imply a possible risk of hyperlipidemia as a result of abnormal metabolism in liver in IPS patients with FATP4 mutations who consume high-sugar diets.
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Affiliation(s)
- Stephan Döring
- Department of Internal Medicine IV, University of Heidelberg Hospital, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Jessica Seeßle
- Department of Internal Medicine IV, University of Heidelberg Hospital, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Hongying Gan-Schreier
- Department of Internal Medicine IV, University of Heidelberg Hospital, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Bahador Javaheri
- Department of Internal Medicine IV, University of Heidelberg Hospital, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Li Jiao
- Institute of Medical Biology, Chinese Academy of Medical Sciences, Peking Union Medical College, Kunming, Yunnan 650118, China
| | - Yuting Cheng
- Department of Internal Medicine IV, University of Heidelberg Hospital, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Sabine Tuma-Kellner
- Department of Internal Medicine IV, University of Heidelberg Hospital, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Gerhard Liebisch
- Institute of Clinical Chemistry and Laboratory Medicine, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany
| | - Thomas Herrmann
- Westkuesten Hospital, Esmarchstraße 50, 25746 Heide, Germany
| | - Wolfgang Stremmel
- Department of Internal Medicine IV, University of Heidelberg Hospital, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Walee Chamulitrat
- Department of Internal Medicine IV, University of Heidelberg Hospital, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany.
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48
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Von Schulze A, McCoin CS, Onyekere C, Allen J, Geiger P, Dorn GW, Morris EM, Thyfault JP. Hepatic mitochondrial adaptations to physical activity: impact of sexual dimorphism, PGC1α and BNIP3-mediated mitophagy. J Physiol 2018; 596:6157-6171. [PMID: 30062822 PMCID: PMC6292817 DOI: 10.1113/jp276539] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 07/18/2018] [Indexed: 12/18/2022] Open
Abstract
KEY POINTS Hepatic mitochondrial adaptations to physical activity may be regulated by mitochondrial biogenesis (PGC1α) and mitophagy (BNIP3). Additionally, these adaptations may be sex-dependent. Chronic increase in physical activity lowers basal mitochondrial respiratory capacity in mice. Female mice have higher hepatic electron transport system protein content, elevated respiratory capacity, lowered mitophagic flux, and emit less mitochondrial H2 O2 independent of physical activity. Males require chronic daily physical activity to attain a similar mitochondrial phenotype compared to females. In contrast, females have limited hepatic adaptations to chronic physical activity. Livers deficient in PGC1α and BNIP3 display similar mitochondrial adaptations to physical activity to those found in wild-type mice. ABSTRACT Hepatic mitochondrial adaptations to physical activity may be regulated by biogenesis- and mitophagy-associated pathways in a sex-dependent manner. Here, we tested if mice with targeted deficiencies in liver-specific peroxisome proliferator-activated receptor γ coactivator 1α (PGC1α; LPGC1α+/- ) and BCL2/adenovirus E1B 19 kDa protein-interacting protein 3 (BNIP3)-mediated mitophagy (BNIP3-/- ) would have reduced physical activity-induced adaptations in respiratory capacity, H2 O2 emission and mitophagy compared to wild-type (WT) controls and if these effects were impacted by sex. Male and female WT, LPGC1α+/- and BNIP3-/- C57BL6/J mice were divided into groups that remained sedentary or had access to daily physical activity via voluntary wheel running (VWR) (n = 6-10/group) for 4 weeks. Mice had ad libitum access to low-fat diet and water. VWR reduced basal mitochondrial respiration, increased mitochondrial coupling and altered ubiquitin-mediated mitophagy in a sex-specific manner in WT mice. Female mice of all genotypes displayed higher electron transport system content, displayed increased ADP-stimulated respiration, produced less mitochondrially derived reactive oxygen species, exhibited reduced mitophagic flux, and were less responsive to VWR compared to males. Males responded more robustly to VWR-induced changes in hepatic mitochondrial function resulting in a match to adaptations found in females. Deficiencies in PGC1α and BNIP3 alone did not largely alter mitochondrial adaptations to VWR. However, VWR restored sex-dependent abnormalities in mitophagic flux in LPGC1α+/- . Finally, BNIP3-/- mice had elevated mitochondrial content and increased mitochondrial respiration putatively through repressed mitophagic flux. In conclusion, hepatic mitochondrial adaptations to physical activity are more dependent on sex than PGC1α and BNIP3.
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Affiliation(s)
- Alex Von Schulze
- Molecular and Integrative PhysiologyUniversity of Kansas Medical CenterKansas CityKS66160USA
- Kansas City VA Medical CenterKansas CityMO64128USA
| | - Colin S. McCoin
- Molecular and Integrative PhysiologyUniversity of Kansas Medical CenterKansas CityKS66160USA
- Kansas City VA Medical CenterKansas CityMO64128USA
| | - Chiemela Onyekere
- Molecular and Integrative PhysiologyUniversity of Kansas Medical CenterKansas CityKS66160USA
| | - Julie Allen
- Molecular and Integrative PhysiologyUniversity of Kansas Medical CenterKansas CityKS66160USA
- Kansas City VA Medical CenterKansas CityMO64128USA
| | - Paige Geiger
- Molecular and Integrative PhysiologyUniversity of Kansas Medical CenterKansas CityKS66160USA
| | - Gerald W. Dorn
- Center for PharmacogenomicsDepartment of Internal MedicineWashington University School of MedicineSt LouisMO63110USA
| | - E. Matthew Morris
- Molecular and Integrative PhysiologyUniversity of Kansas Medical CenterKansas CityKS66160USA
- Kansas City VA Medical CenterKansas CityMO64128USA
| | - John P. Thyfault
- Molecular and Integrative PhysiologyUniversity of Kansas Medical CenterKansas CityKS66160USA
- Kansas City VA Medical CenterKansas CityMO64128USA
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Sujkowski A, Wessells R. Using Drosophila to Understand Biochemical and Behavioral Responses to Exercise. Exerc Sport Sci Rev 2018; 46:112-120. [PMID: 29346165 PMCID: PMC5856617 DOI: 10.1249/jes.0000000000000139] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The development of endurance exercise paradigms in Drosophila has facilitated study of genetic factors that control individual response to exercise. Recent work in Drosophila has demonstrated that activation of octopaminergic neurons is alone sufficient to confer exercise adaptations to sedentary flies. These results suggest that adrenergic activity is both necessary and sufficient to promote endurance exercise adaptations.
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Affiliation(s)
- Alyson Sujkowski
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI
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50
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Campbell GJ, Belobrajdic DP, Bell-Anderson KS. Determining the Glycaemic Index of Standard and High-Sugar Rodent Diets in C57BL/6 Mice. Nutrients 2018; 10:nu10070856. [PMID: 29966395 PMCID: PMC6073758 DOI: 10.3390/nu10070856] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 06/23/2018] [Accepted: 06/29/2018] [Indexed: 12/17/2022] Open
Abstract
The glycaemic index (GI) is a useful tool to compare the glycaemic responses of foods. Numerous studies report the favorable effects of low GI diets on long term metabolic health compared with high GI diets. However, it has not been possible to link these effects to the GI itself because of other components such as macronutrients and dietary fibre, which are known to affect GI. This study aimed to create and evaluate isocaloric diets differing in GI independent of macronutrient and fibre content. The GIs of eight diets differing in carbohydrate source were evaluated in mice; cooked cornstarch (CC), raw cornstarch (RC), chow, maltodextrin, glucose, sucrose, isomaltulose, and fructose. A glucose control was also tested. The GIs of all eight diets were different from the GI of the glucose control (GI: 100; p < 0.0001). The GIs of the glucose (mean ± SEM: 52 ± 3), maltodextrin (52 ± 6), CC (50 ± 4), RC (50 ± 6), and chow (44 ± 4) diets were similar, while the GIs of the sucrose (31 ± 4), isomaltulose (24 ± 5), and fructose (18 ± 2) diets were lower than all other diets (p < 0.05). This is the first trial to report GI testing in vivo in mice, resulting in three main findings: chow is relatively high GI, the glucose availability of raw and cooked cornstarch is similar, and the GI of different sugar diets occur in the same rank order as in humans.
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Affiliation(s)
- Grace J Campbell
- Charles Perkins Centre, School of Life and Environmental Sciences, University of Sydney, Sydney, NSW 2006, Australia.
| | - Damien P Belobrajdic
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Health and Biosecurity, Adelaide, SA 5000, Australia.
| | - Kim S Bell-Anderson
- Charles Perkins Centre, School of Life and Environmental Sciences, University of Sydney, Sydney, NSW 2006, Australia.
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