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Laskin GR, Rentería LI, Muller-Delp JM, Kim JS, Chase PB, Hwang HS, Gordon BS. Short-term aerobic exercise prevents development of glucocorticoid myopathic features in aged skeletal muscle in a sex-dependent manner. J Physiol 2024. [PMID: 38861348 DOI: 10.1113/jp286334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 05/28/2024] [Indexed: 06/13/2024] Open
Abstract
Older adults are vulnerable to glucocorticoid-induced muscle atrophy and weakness, with sex potentially influencing their susceptibility to those effects. Aerobic exercise can reduce glucocorticoid-induced muscle atrophy in young rodents. However, it is unknown whether aerobic exercise can prevent glucocorticoid myopathy in aged muscle. The objectives of this study were to define the extent to which sex influences the development of glucocorticoid myopathy in aged muscle, and to determine the extent to which aerobic exercise training protects against myopathy development. Twenty-four-month-old female (n = 30) and male (n = 33) mice were randomized to either sedentary or aerobic exercise groups. Within their respective groups, mice were randomized to either daily treatment with dexamethasone (DEX) or saline. Upon completing treatments, the contractile properties of the triceps surae complex were assessed in situ. DEX marginally lowered muscle mass and soluble protein content in both sexes, which was attenuated by aerobic exercise only in females. DEX increased sub-tetanic force and rate of force development only in females, which was not influenced by aerobic exercise. Muscle fatigue was higher in both sexes following DEX, but aerobic exercise prevented fatigue induction only in females. The sex-specific differences to muscle function in response to DEX treatment coincided with sex-specific changes to the content of proteins related to calcium handling, mitochondrial quality control, reactive oxygen species production, and glucocorticoid receptor in muscle. These findings define several important sexually dimorphic changes to aged skeletal muscle physiology in response to glucocorticoid treatment and define the capacity of short-term aerobic exercise to protect against those changes. KEY POINTS: There are sexually dimorphic effects of glucocorticoids on aged skeletal muscle physiology. Glucocorticoid-induced changes to aged muscle contractile properties coincide with sex-specific differences in the content of calcium handling proteins. Aerobic exercise prevents glucocorticoid-induced fatigue only in aged females and coincides with differences in the content of mitochondrial quality control proteins and glucocorticoid receptors.
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Affiliation(s)
- Grant R Laskin
- Department of Health, Nutrition, and Food Sciences, Florida State University, Tallahassee, Florida, USA
| | - Liliana I Rentería
- Department of Health, Nutrition, and Food Sciences, Florida State University, Tallahassee, Florida, USA
- Institute of Sports Sciences and Medicine, Florida State University, Tallahassee, Florida, USA
| | - Judy M Muller-Delp
- Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, Florida, USA
| | - Jeong-Su Kim
- Department of Health, Nutrition, and Food Sciences, Florida State University, Tallahassee, Florida, USA
| | - P Bryant Chase
- Department of Biological Science, Florida State University, Tallahassee, Florida, USA
| | - Hyun Seok Hwang
- Department of Health, Nutrition, and Food Sciences, Florida State University, Tallahassee, Florida, USA
| | - Bradley S Gordon
- Department of Health, Nutrition, and Food Sciences, Florida State University, Tallahassee, Florida, USA
- Institute of Sports Sciences and Medicine, Florida State University, Tallahassee, Florida, USA
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Bahr F, Ricke-Hoch M, Ponimaskin E, Müller F. Serotonin Receptors in Myocardial Infarction: Friend or Foe? ACS Chem Neurosci 2024; 15:1619-1634. [PMID: 38573542 PMCID: PMC11027101 DOI: 10.1021/acschemneuro.4c00031] [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: 01/16/2024] [Revised: 03/12/2024] [Accepted: 03/13/2024] [Indexed: 04/05/2024] Open
Abstract
Acute myocardial infarction (AMI) is one of the leading causes of death worldwide and treatment costs pose a major burden on the global health care system. Despite the variety of treatment options, individual recovery can be still poor and the mortality rate, especially in the first few years after the event, remains high. Therefore, intense research is currently focused on identifying novel target molecules to improve the outcome following AMI. One of the potentially interesting targets is the serotonergic system (5-HT system), not at least because of its connection to mental disorders. It is known that patients suffering from AMI have an increased risk of developing depression and vice versa. This implicates that the 5-HT system can be affected in response to AMI and might thus represent a target structure for patients' treatment. This review aims to highlight the importance of the 5-HT system after AMI by describing the role of individual serotonin receptors (5-HTR) in the regulation of physiological and pathophysiological responses. It particularly focuses on the signaling pathways of the serotonin receptors 1, 2, 4, and 7, which are expressed in the cardiovascular system, during disease onset, and the following remodeling process. This overview also emphasizes the importance of the 5-HT system in AMI etiology and highlights 5-HTRs as potential treatment targets.
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Affiliation(s)
- F.S. Bahr
- Cellular
Neurophysiology, Hannover Medical School, 30625 Hannover, Germany
| | - M. Ricke-Hoch
- Cardiology
and Angiology, Hannover Medical School, 30625 Hannover, Germany
| | - E. Ponimaskin
- Cellular
Neurophysiology, Hannover Medical School, 30625 Hannover, Germany
| | - F.E. Müller
- Cellular
Neurophysiology, Hannover Medical School, 30625 Hannover, Germany
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Oakley RH, Riddick NV, Moy SS, Cidlowski JA. Imbalanced glucocorticoid and mineralocorticoid stress hormone receptor function has sex-dependent and independent regulatory effects in the mouse hippocampus. Neurobiol Stress 2024; 28:100589. [PMID: 38075021 PMCID: PMC10709088 DOI: 10.1016/j.ynstr.2023.100589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 10/25/2023] [Accepted: 11/12/2023] [Indexed: 02/12/2024] Open
Abstract
Many stress-related neuropsychiatric disorders display pronounced sex differences in their frequency and clinical symptoms. Glucocorticoids are primary stress hormones that have been implicated in the development of these disorders but whether they contribute to the observed sex bias is poorly understood. Glucocorticoids signal through two closely related nuclear receptors, the glucocorticoid (GR) and mineralocorticoid receptor (MR). To elucidate the sex-specific and independent actions of glucocorticoids in the hippocampus, we developed knockout mice lacking hippocampal GR, MR, or both GR and MR. Mice deficient in hippocampal MR or both GR and MR showed an altered molecular phenotype of CA2 neurons and reduced anxiety-like behavior in both sexes, but altered stress adaptation behavior only in females and enhanced fear-motivated cue learning only in males. All three knockout mouse models displayed reduced sociability but only in male mice. Male and female mice deficient in both hippocampal GR and MR exhibited extensive neurodegeneration in the dentate gyrus. Global transcriptomic analysis revealed a marked expansion in the number of dysregulated genes in the hippocampus of female knockout mice compared to their male counterparts; however, the overall patterns of gene dysregulation were remarkably similar in both sexes. Within and across sex comparisons identified key GR and MR target genes and associated signaling pathways underlying the knockout phenotypes. These findings define major sex-dependent and independent effects of GR/MR imbalances on gene expression and functional profiles in the hippocampus and inform new strategies for treating men and women with stress-related neuropsychiatric disorders.
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Affiliation(s)
- Robert H. Oakley
- Signal Transduction Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, 27709, USA
| | - Natallia V. Riddick
- Department of Psychiatry and Carolina Institute for Developmental Disabilities, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Sheryl S. Moy
- Department of Psychiatry and Carolina Institute for Developmental Disabilities, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - John A. Cidlowski
- Signal Transduction Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, 27709, USA
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Amatya S, Tietje-Mckinney D, Mueller S, Petrillo MG, Woolard MD, Bharrhan S, Orr AW, Kevil CG, Cidlowski JA, Cruz-Topete D. Adipocyte Glucocorticoid Receptor Inhibits Immune Regulatory Genes to Maintain Immune Cell Homeostasis in Adipose Tissue. Endocrinology 2023; 164:bqad143. [PMID: 37738419 PMCID: PMC10558062 DOI: 10.1210/endocr/bqad143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 09/14/2023] [Accepted: 09/19/2023] [Indexed: 09/24/2023]
Abstract
Glucocorticoids acting via the glucocorticoid receptors (GR) are key regulators of metabolism and the stress response. However, uncontrolled or excessive GR signaling adversely affects adipose tissue, including endocrine, immune, and metabolic functions. Inflammation of the adipose tissue promotes systemic metabolic dysfunction; however, the molecular mechanisms underlying the role of adipocyte GR in regulating genes associated with adipose tissue inflammation are poorly understood. We performed in vivo studies using adipocyte-specific GR knockout mice in conjunction with in vitro studies to understand the contribution of adipocyte GR in regulating adipose tissue immune homeostasis. Our findings show that adipocyte-specific GR signaling regulates adipokines at both mRNA and plasma levels and immune regulatory (Coch, Pdcd1, Cemip, and Cxcr2) mRNA gene expression, which affects myeloid immune cell presence in white adipose tissue. We found that, in adipocytes, GR directly influences Cxcr2. This chemokine receptor promotes immune cell migration, indirectly affecting Pdcd1 and Cemip gene expression in nonadipocyte or stromal cells. Our findings suggest that GR adipocyte signaling suppresses inflammatory signals, maintaining immune homeostasis. We also found that GR signaling in adipose tissue in response to stress is sexually dimorphic. Understanding the molecular relationship between GR signaling and adipose tissue inflammation could help develop potential targets to improve local and systemic inflammation, insulin sensitivity, and metabolic health.
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Affiliation(s)
- Shripa Amatya
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center—Shreveport, Shreveport, LA 71103, USA
- Center for Cardiovascular Diseases and Sciences and Center for Redox Biology and Cardiovascular Disease, Louisiana State University Health Sciences Center—Shreveport, Shreveport, LA 71103, USA
| | - Dylan Tietje-Mckinney
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center—Shreveport, Shreveport, LA 71103, USA
| | - Schaefer Mueller
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center—Shreveport, Shreveport, LA 71103, USA
| | - Maria G Petrillo
- Department of Health and Human Services, Signal Transduction Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA
| | - Matthew D Woolard
- Center for Cardiovascular Diseases and Sciences and Center for Redox Biology and Cardiovascular Disease, Louisiana State University Health Sciences Center—Shreveport, Shreveport, LA 71103, USA
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center—Shreveport, Shreveport, LA 71103, USA
| | - Sushma Bharrhan
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center—Shreveport, Shreveport, LA 71103, USA
| | - Anthony Wayne Orr
- Center for Cardiovascular Diseases and Sciences and Center for Redox Biology and Cardiovascular Disease, Louisiana State University Health Sciences Center—Shreveport, Shreveport, LA 71103, USA
- Department of Pathology and Translational Pathobiology, Louisiana State University Health Sciences Center—Shreveport, Shreveport, LA 71103, USA
| | - Christopher G Kevil
- Center for Cardiovascular Diseases and Sciences and Center for Redox Biology and Cardiovascular Disease, Louisiana State University Health Sciences Center—Shreveport, Shreveport, LA 71103, USA
- Department of Pathology and Translational Pathobiology, Louisiana State University Health Sciences Center—Shreveport, Shreveport, LA 71103, USA
| | - John A Cidlowski
- Department of Health and Human Services, Signal Transduction Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA
| | - Diana Cruz-Topete
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center—Shreveport, Shreveport, LA 71103, USA
- Center for Cardiovascular Diseases and Sciences and Center for Redox Biology and Cardiovascular Disease, Louisiana State University Health Sciences Center—Shreveport, Shreveport, LA 71103, USA
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5
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Galow AM, Brenmoehl J, Hoeflich A. Synergistic effects of hormones on structural and functional maturation of cardiomyocytes and implications for heart regeneration. Cell Mol Life Sci 2023; 80:240. [PMID: 37541969 PMCID: PMC10403476 DOI: 10.1007/s00018-023-04894-6] [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: 04/04/2023] [Revised: 07/18/2023] [Accepted: 07/22/2023] [Indexed: 08/06/2023]
Abstract
The limited endogenous regenerative capacity of the human heart renders cardiovascular diseases a major health threat, thus motivating intense research on in vitro heart cell generation and cell replacement therapies. However, so far, in vitro-generated cardiomyocytes share a rather fetal phenotype, limiting their utility for drug testing and cell-based heart repair. Various strategies to foster cellular maturation provide some success, but fully matured cardiomyocytes are still to be achieved. Today, several hormones are recognized for their effects on cardiomyocyte proliferation, differentiation, and function. Here, we will discuss how the endocrine system impacts cardiomyocyte maturation. After detailing which features characterize a mature phenotype, we will contemplate hormones most promising to induce such a phenotype, the routes of their action, and experimental evidence for their significance in this process. Due to their pleiotropic effects, hormones might be not only valuable to improve in vitro heart cell generation but also beneficial for in vivo heart regeneration. Accordingly, we will also contemplate how the presented hormones might be exploited for hormone-based regenerative therapies.
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Affiliation(s)
- Anne-Marie Galow
- Institute of Genome Biology, Research Institute for Farm Animal Biology (FBN), 18196, Dummerstorf, Germany.
| | - Julia Brenmoehl
- Institute of Genome Biology, Research Institute for Farm Animal Biology (FBN), 18196, Dummerstorf, Germany
| | - Andreas Hoeflich
- Institute of Genome Biology, Research Institute for Farm Animal Biology (FBN), 18196, Dummerstorf, Germany
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Alcantara-Zapata DE, Lucero N, De Gregorio N, Astudillo Cornejo P, Ibarra Villanueva C, Baltodano-Calle MJ, Gonzales GF, Behn C. Women's mood at high altitude. sexual dimorphism in hypoxic stress modulation by the tryptophan-melatonin axis. Front Physiol 2023; 13:1099276. [PMID: 36733695 PMCID: PMC9887123 DOI: 10.3389/fphys.2022.1099276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 12/28/2022] [Indexed: 01/18/2023] Open
Abstract
Sexual (and gender)-dimorphism in tolerance to hypobaric hypoxia increasingly matters for a differential surveillance of human activities at high altitude (HA). At low altitudes, the prevalence of anxiety and depression in women has already been found to double when compared with men; it could be expected to even increase on exposure to HA. In purposefully caring for the health of women at HA, the present work explores the potential involvement of the tryptophan (Trp)-melatonin axis in mood changes on exposure to hypobaric hypoxia. The present work highlights some already known anxiogenic effects of HA exposure. Hypoxia and insomnia reduce serotonin (5-HT) availability; the latter defect being expressed as failure of brown adipose tissue (BAT) activation and mood disorders. Rapid eye movement (REM) sleep organization and synapsis restoration that are additionally affected by hypoxia impair memory consolidation. Affective complaints may thus surge, evolving into anxiety and depression. Sex-related differences in neural network organization and hormonal changes during the menstrual cycle, and certainly also during the life cycle, underscore the possibility of 5-HT-related mood alterations, particularly in women on HA exposure. The mean brain rate of 5-HT synthesis at sea level is already 1.5-fold higher in males than in females. sexual dimorphism also evidences the overexpression effects of SERT, a 5-HT transporter protein. Gonadal and thyroid hormones, as influenced by HA exposure, further modulate 5-HT availability and its effects in women. Besides caring for adequate oxygenation and maintenance of one's body core temperature, special precautions concerning women sojourning at HA should include close observations of hormonal cycles and, perhaps, also trials with targeted antidepressants.
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Affiliation(s)
- D. E. Alcantara-Zapata
- Laboratorio de Endocrinología y Reproducción, Laboratorios de Investigación y Desarrollo (LID), Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - N. Lucero
- Occupational Health Program, School of Public Health, University of Chile, Santiago, Chile
| | - N. De Gregorio
- Laboratory of Extreme Environments, Department of Physiology and Biophysics, Biomedical Science Institute (ICBM), Faculty of Medicine, University of Chile, Santiago, Chile
| | - P. Astudillo Cornejo
- Occupational Ergonomics Program, Department of Kinesiology, University of Atacama, Copiapó, Chile
| | - C. Ibarra Villanueva
- Occupational Ergonomics Program, Department of Kinesiology, University of Atacama, Copiapó, Chile
| | - M. J. Baltodano-Calle
- Laboratorio de Endocrinología y Reproducción, Laboratorios de Investigación y Desarrollo (LID), Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - G. F. Gonzales
- Laboratorio de Endocrinología y Reproducción, Laboratorios de Investigación y Desarrollo (LID), Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Perú
- High Altitude Research Institute, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - C. Behn
- Laboratory of Extreme Environments, Department of Physiology and Biophysics, Biomedical Science Institute (ICBM), Faculty of Medicine, University of Chile, Santiago, Chile
- Faculty of Medicine, University of Atacama, Copiapó, Chile
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7
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Gaffey AE, Rosman L, Sico JJ, Haskell SG, Brandt CA, Bathulapalli H, Han L, Dziura J, Skanderson M, Burg MM. Military sexual trauma and incident hypertension: a 16-year cohort study of young and middle-aged men and women. J Hypertens 2022; 40:2307-2315. [PMID: 35983872 DOI: 10.1097/hjh.0000000000003267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES Veterans, especially women, are three times more to experience sexual harassment and assault [military sexual trauma (MST)] than civilians. As trauma is associated with elevated cardiovascular risk, we investigated whether MST independently contributes to risk for incident hypertension and whether the effects are distinct among women. METHODS We assessed 788 161 post-9/11 Veterans ( Mage = 32.14 years, 13% women) who were free of hypertension at baseline, using nationwide Veterans Health Administration data collected 2001-2017. Time-varying, multivariate Cox proportional hazard models were used to examine the independent contribution of MST to new cases of hypertension while sequentially adjusting for demographics, lifestyle and cardiovascular risk factors, including baseline blood pressure, and psychiatric disorders including posttraumatic stress disorder. We then tested for effect modification by sex. RESULTS Over 16 years [mean = 10.23 (SD: 3.69)], 35 284 Veterans screened positive for MST (67% were women). In the fully adjusted model, MST was associated with a 15% greater risk of hypertension [95% confidence interval (95% CI) 1.11-1.19]. In sex-specific analyses, men and women with a history of MST showed a 6% (95% CI, 1.00-1.12, P = 0.042) and 20% greater risk of hypertension (95% CI, 1.15-1.26, P < 0.001), respectively. CONCLUSION In this large prospective cohort of young and middle-aged Veterans, MST was associated with incident hypertension after controlling for established risk factors, including trauma-related psychiatric disorders. Although MST is disproportionately experienced by women, and the negative cardiovascular impact of MST is demonstrated for both sexes, the association with hypertension may be greater for women. Subsequent research should determine if early MST assessment and treatment attenuates this risk.
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Affiliation(s)
- Allison E Gaffey
- VA Connecticut Healthcare System, West Haven
- Department of Internal Medicine (Cardiovascular Medicine), Yale School of Medicine, New Haven, Connecticut
| | - Lindsey Rosman
- Division of Cardiology, Department of Medicine, University of North Carolina, Chapel Hill, Chapel Hill, North Carolina
| | - Jason J Sico
- VA Connecticut Healthcare System, West Haven
- Department of Neurology and Center for NeuroEpidemiological and Clinical Neurological Research
| | - Sally G Haskell
- VA Connecticut Healthcare System, West Haven
- Department of Internal Medicine (General Medicine)
| | - Cynthia A Brandt
- VA Connecticut Healthcare System, West Haven
- Department of Emergency Medicine
- Yale Center for Medical Informatics
| | - Harini Bathulapalli
- VA Connecticut Healthcare System, West Haven
- Department of Internal Medicine (General Medicine)
| | - Ling Han
- Department of Internal Medicine, Program on Aging
| | - James Dziura
- VA Connecticut Healthcare System, West Haven
- Department of Emergency Medicine
| | | | - Matthew M Burg
- VA Connecticut Healthcare System, West Haven
- Department of Internal Medicine (Cardiovascular Medicine), Yale School of Medicine, New Haven, Connecticut
- Department of Anesthesiology, Yale School of Medicine, New Haven, Connecticut, USA
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