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Tausendfreund O, Bidlingmaier M, Martini S, Reif H, Rippl M, Schilbach K, Schmidmaier R, Drey M. The somatotroph pituitary gland function in high-aged multimorbid hospitalized patients with IGF-I deficiency. Pituitary 2024:10.1007/s11102-024-01406-y. [PMID: 38819617 DOI: 10.1007/s11102-024-01406-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/17/2024] [Indexed: 06/01/2024]
Abstract
PURPOSE It is unclear whether the age-related decline in the somatotropic axis stems from a reduced growth hormone (GH) production in the pituitary gland, or from a peripheral origin akin to an acquired GH resistance. With the help of a GHRH/arginine test, high-aged multimorbid hospitalized patients with IGF-I deficiency are to be tested to determine whether there is primarily a pituitary GH deficiency in the sense of a somatopause. METHODS Seventeen multimorbid patients (eleven men and six women) with a mean age of 82 years, with IGF-I concentrations below two standard deviations of 30-year-old men and women were identified. Patients suffered from a variety of common age-related stable diseases including coronary artery disease, chronic liver or kidney disease, chronic heart failure as well as acute conditions e.g., urosepsis or endocarditis. To assess the somatotropic axis they underwent a GHRH/arginine test. Results were evaluated using descriptive statistics. RESULTS In average, the peak concentration of GH after stimulation was 14.8 µg/L with a range from 2.76 to 47.4 µg/L. Taking into account both, gender and BMI (with a mean of 26.5 kg/m²) for each participant, the pituitary gland was adequately stimulated in 16 out of the 17 patients. No patient reported common side effects related to the GHRH/arginine test. CONCLUSION The somatotroph pituitary gland retains its secretory capacity in the advanced aged. Therefore, age does not seem to be the driving pacemaker for the functional decline of the somatotropic axis within the aged population.
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Affiliation(s)
| | - Martin Bidlingmaier
- Department of Medicine IV, University Hospital, LMU Munich, München, Germany
| | - Sebastian Martini
- Department of Medicine IV, University Hospital, LMU Munich, München, Germany
| | - Hannah Reif
- Department of Medicine IV, University Hospital, LMU Munich, München, Germany
| | - Michaela Rippl
- Department of Medicine IV, University Hospital, LMU Munich, München, Germany
| | - Katharina Schilbach
- Department of Medicine IV, University Hospital, LMU Munich, München, Germany
- Deggendorf Institute of Technology, Deggendorf, Germany
| | - Ralf Schmidmaier
- Department of Medicine IV, University Hospital, LMU Munich, München, Germany
| | - Michael Drey
- Department of Medicine IV, University Hospital, LMU Munich, München, Germany
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2
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Luo YE, Villani KR, Lei H, Kuo LY, Imery I, Stoker BE, Fatima N, Noles SM, Moore CM, Barton ER. Ablation of specific insulin-like growth factor I forms reveals the importance of cleavage for regenerative capacity and glycosylation for skeletal muscle storage. FASEB J 2024; 38:e23634. [PMID: 38679876 PMCID: PMC11107140 DOI: 10.1096/fj.202302512rr] [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: 12/05/2023] [Revised: 04/05/2024] [Accepted: 04/16/2024] [Indexed: 05/01/2024]
Abstract
Insulin-like growth factor-I (IGF-I) facilitates mitotic and anabolic actions in all tissues. In skeletal muscle, IGF-I can promote growth and resolution of damage by promoting satellite cell proliferation and differentiation, suppressing inflammation, and enhancing fiber formation. While the most well-characterized form of IGF-I is the mature protein, alternative splicing and post-translational modification complexity lead to several additional forms of IGF-I. Previous studies showed muscle efficiently stores glycosylated pro-IGF-I. However, non-glycosylated forms display more efficient IGF-I receptor activation in vitro, suggesting that the removal of the glycosylated C terminus is a necessary step to enable increased activity. We employed CRISPR-Cas9 gene editing to ablate IGF-I glycosylation sites (2ND) or its cleavage site (3RA) in mice to determine the necessity of glycosylation or cleavage for IGF-I function in postnatal growth and during muscle regeneration. 3RA mice had the highest circulating and muscle IGF-I content, whereas 2ND mice had the lowest levels compared to wild-type mice. After weaning, 4-week-old 2ND mice exhibited higher body and skeletal muscle mass than other strains. However, by 16 weeks of age, muscle and body size differences disappeared. Even though 3RA mice had more IGF-I stored in muscle in homeostatic conditions, regeneration was delayed after cardiotoxin-induced injury, with prolonged necrosis most evident at 5 days post injury (dpi). In contrast, 2ND displayed improved regeneration with reduced necrosis, and greater fiber size and muscle mass at 11 and 21 dpi. Overall, these results demonstrate that while IGF-I glycosylation may be important for storage, cleavage is needed to enable IGF-I to be used for efficient activity in postnatal growth and following acute injury.
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Affiliation(s)
- Yangyi E. Luo
- Applied Physiology and Kinesiology, University of Florida, Gainesville, FL USA
- Myology Institute, University of Florida, Gainesville, FL USA
| | - Katelyn R. Villani
- Applied Physiology and Kinesiology, University of Florida, Gainesville, FL USA
- Myology Institute, University of Florida, Gainesville, FL USA
| | - Hanqin Lei
- Applied Physiology and Kinesiology, University of Florida, Gainesville, FL USA
| | - Li-Ying Kuo
- Applied Physiology and Kinesiology, University of Florida, Gainesville, FL USA
| | - Ian Imery
- Applied Physiology and Kinesiology, University of Florida, Gainesville, FL USA
| | - Bradley E. Stoker
- Applied Physiology and Kinesiology, University of Florida, Gainesville, FL USA
| | - Naureen Fatima
- Applied Physiology and Kinesiology, University of Florida, Gainesville, FL USA
| | - Steven M. Noles
- Applied Physiology and Kinesiology, University of Florida, Gainesville, FL USA
| | - Cara M. Moore
- Animal Care Services, University of Florida, Gainesville, FL USA
| | - Elisabeth R. Barton
- Applied Physiology and Kinesiology, University of Florida, Gainesville, FL USA
- Myology Institute, University of Florida, Gainesville, FL USA
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Xu H, Xiang QY, Zhan JK, Wang Y, Wang YJ, Li S, Liu YS. Association between macro- and microvascular damage and sarcopenia index in individuals with type 2 diabetes mellitus. Appl Physiol Nutr Metab 2024. [PMID: 38346295 DOI: 10.1139/apnm-2023-0476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
Sarcopenia was recently reported to be relevant to an increased macro-and microvascular disease risk. Sarcopenia index (SI) has been identified as a surrogate marker for sarcopenia. The aim of the present study was to investigate the association between macro- and microvascular disease and SI in patients with type 2 diabetes mellitus (T2DM). A total of 783 patients with T2DM were enrolled in this cross-sectional study. The SI was calculated by (serum creatinine [mg/dL]/cystatin C [mg/L]) × 100. The subjects were divided into three groups according to SI tertiles: T1 (41.27-81.37), T2 (81.38- 99.55), and T3 (99.56-192.31). Parameters of macro- and microvascular complications, including diabetic retinopathy (DR), micro- and macroalbuminuria (MAU), diabetic peripheral neuropathy (DPN), and lower extremity peripheral artery disease (LEAD) were evaluated. Multivariate logistic regression analysis revealed that when taking the top tertile of SI as a reference, an increasing trend of the prevalence of DR, MAU, DPN, and LEAD were presented (all P for trend < 0.05), where the OR (95% CI) for DR prevalence was 1.967 (1.252-3.090) in T2, 2.195 (1.278-3.769) in T1, for MAU was 1.805 (1.149-2.837) in T2, 2.537 (1.490-4.320) in T1, for DPN was 2.244 (1.485-3.391) in T2, 3.172 (1.884-5.341) in T1, and for LEAD was 2.017 (1.002-4.057) in T2, 2.405 (1.107-5.225) in T1 (all P < 0.05). Patients with lower SI were more inclined to have an increased risk of macro- and microvascular damage in T2DM population, which may be related to sarcopenia.
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Affiliation(s)
- Hui Xu
- Department of Geriatrics, Peking University First Hospital, Beijing, 100034, China
- Institute of Aging and Age-related Disease Research, Central South University, Changsha, Hunan, 410011, China
| | - Qun-Yan Xiang
- Institute of Aging and Age-related Disease Research, Central South University, Changsha, Hunan, 410011, China
- Department of Geriatrics, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
| | - Jun-Kun Zhan
- Institute of Aging and Age-related Disease Research, Central South University, Changsha, Hunan, 410011, China
- Department of Geriatrics, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
| | - Yi Wang
- Institute of Aging and Age-related Disease Research, Central South University, Changsha, Hunan, 410011, China
- Department of Geriatrics, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
| | - Yan-Jiao Wang
- Institute of Aging and Age-related Disease Research, Central South University, Changsha, Hunan, 410011, China
- Department of Geriatrics, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
| | - Shuang Li
- Institute of Aging and Age-related Disease Research, Central South University, Changsha, Hunan, 410011, China
- Department of Geriatrics, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
| | - You-Shuo Liu
- Institute of Aging and Age-related Disease Research, Central South University, Changsha, Hunan, 410011, China
- Department of Geriatrics, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
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Yeh TS, Lei TH, Barnes MJ, Zhang L. Astragalosides Supplementation Enhances Intrinsic Muscle Repair Capacity Following Eccentric Exercise-Induced Injury. Nutrients 2022; 14:4339. [PMID: 36297022 PMCID: PMC9608496 DOI: 10.3390/nu14204339] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 10/13/2022] [Accepted: 10/14/2022] [Indexed: 10/26/2023] Open
Abstract
Astragalosides have been shown to enhance endurance exercise capacity in vivo and promote muscular hypertrophy in vitro. However, it remains unknown whether astragalosides supplementation can alter inflammatory response and enhance muscle recovery after damage in humans. We therefore aimed to evaluate the effect of astragalosides supplementation on muscle's intrinsic capacity to regenerate and repair itself after exercise-induced damage. Using a randomized double-blind placebo-controlled cross-over design, eleven male participants underwent 7 days of astragalosides supplementation (in total containing 4 mg of astragalosides per day) or a placebo control, following an eccentric exercise protocol. Serum blood samples and variables related to muscle function were collected prior to and immediately following the muscle damage protocol and also at 2 h, and 1, 2, 3, 5, and 7 days of the recovery period, to assess the pro-inflammatory cytokine response, the secretion of muscle regenerative factors, and muscular strength. Astragalosides supplementation reduced biomarkers of skeletal muscle damage (serum CK, LDH, and Mb), when compared to the placebo, at 1, 2, and 3 days following the muscle damage protocol. Astragalosides supplementation suppressed the secretion of IL-6 and TNF-α, whilst increasing the release of IGF-1 during the initial stages of muscle recovery. Furthermore, following astragaloside supplementation, muscular strength returned to baseline 2 days earlier than the placebo. Astragalosides supplementation shortens the duration of inflammation, enhances the regeneration process and restores muscle strength following eccentric exercise-induced injury.
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Affiliation(s)
- Tzu-Shao Yeh
- School of Public Health, Nantong University, Nantong 226019, China
- Institute of Interdisciplinary Integrative Medicine Research, School of Medicine, Nantong University, Nantong 226001, China
| | - Tze-Huan Lei
- College of Physical Education, Hubei Normal University, Huangshi 435002, China
| | - Matthew J. Barnes
- School of Sport, Exercise and Nutrition, Massey University, Palmerston North 4410, New Zealand
| | - Lei Zhang
- Institute of Interdisciplinary Integrative Medicine Research, School of Medicine, Nantong University, Nantong 226001, China
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Stalmach A, Boehm I, Fernandes M, Rutter A, Skipworth RJE, Husi H. Gene Ontology (GO)-Driven Inference of Candidate Proteomic Markers Associated with Muscle Atrophy Conditions. Molecules 2022; 27:molecules27175514. [PMID: 36080280 PMCID: PMC9457532 DOI: 10.3390/molecules27175514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 08/19/2022] [Accepted: 08/23/2022] [Indexed: 11/16/2022] Open
Abstract
Skeletal muscle homeostasis is essential for the maintenance of a healthy and active lifestyle. Imbalance in muscle homeostasis has significant consequences such as atrophy, loss of muscle mass, and progressive loss of functions. Aging-related muscle wasting, sarcopenia, and atrophy as a consequence of disease, such as cachexia, reduce the quality of life, increase morbidity and result in an overall poor prognosis. Investigating the muscle proteome related to muscle atrophy diseases has a great potential for diagnostic medicine to identify (i) potential protein biomarkers, and (ii) biological processes and functions common or unique to muscle wasting, cachexia, sarcopenia, and aging alone. We conducted a meta-analysis using gene ontology (GO) analysis of 24 human proteomic studies using tissue samples (skeletal muscle and adipose biopsies) and/or biofluids (serum, plasma, urine). Whilst there were few similarities in protein directionality across studies, biological processes common to conditions were identified. Here we demonstrate that the GO analysis of published human proteomics data can identify processes not revealed by single studies. We recommend the integration of proteomics data from tissue samples and biofluids to yield a comprehensive overview of the human skeletal muscle proteome. This will facilitate the identification of biomarkers and potential pathways of muscle-wasting conditions for use in clinics.
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Affiliation(s)
- Angelique Stalmach
- Centre for Health Science, Division of Biomedical Sciences, Institute of Health Research and Innovation, School of Health, Social Care and Life Sciences, University of the Highlands and Islands, Inverness IV2 3JH, UK
| | - Ines Boehm
- Edinburgh Cancer Research UK Tissue Group, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh EH4 2XR, UK
- Clinical Surgery, University of Edinburgh, Royal Infirmary of Edinburgh, Edinburgh EH16 4SA, UK
- Biozentrum, University of Basel, 4056 Basel, Switzerland
| | - Marco Fernandes
- Department of Psychiatry, University of Oxford, Oxford OX3 7JX, UK
| | - Alison Rutter
- Centre for Health Science, Division of Biomedical Sciences, Institute of Health Research and Innovation, School of Health, Social Care and Life Sciences, University of the Highlands and Islands, Inverness IV2 3JH, UK
| | - Richard J. E. Skipworth
- Clinical Surgery, University of Edinburgh, Royal Infirmary of Edinburgh, Edinburgh EH16 4SA, UK
| | - Holger Husi
- Centre for Health Science, Division of Biomedical Sciences, Institute of Health Research and Innovation, School of Health, Social Care and Life Sciences, University of the Highlands and Islands, Inverness IV2 3JH, UK
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow G12 8TA, UK
- Correspondence:
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Wannarong T, Sukpornchairak P, Naweera W, Geiger CD, Ungprasert P. Association between diabetic peripheral neuropathy and sarcopenia: A systematic review and meta‐analysis. Geriatr Gerontol Int 2022; 22:785-789. [DOI: 10.1111/ggi.14462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 07/24/2022] [Accepted: 07/27/2022] [Indexed: 11/29/2022]
Affiliation(s)
- Thapat Wannarong
- Department of Neurology Neurological Institute, University Hospitals Cleveland Medical Center, Case Western Reserve University School of Medicine Cleveland Ohio USA
- Neuromuscular Division, Department of Neurology Duke University Hospital Durham North Carolina USA
| | - Persen Sukpornchairak
- Department of Neurology Neurological Institute, University Hospitals Cleveland Medical Center, Case Western Reserve University School of Medicine Cleveland Ohio USA
| | - Weerakit Naweera
- Nephrology Division, Department of Internal Medicine King Narai Hospital Lopburi Thailand
| | - Christopher D. Geiger
- Department of Neurology Neurological Institute, University Hospitals Cleveland Medical Center, Case Western Reserve University School of Medicine Cleveland Ohio USA
| | - Patompong Ungprasert
- Department of Rheumatic and Immunologic Diseases Cleveland Clinic Foundation Cleveland Ohio USA
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Oudbier SJ, Goh J, Looijaard SMLM, Reijnierse EM, Meskers CGM, Maier AB. Pathophysiological mechanisms explaining the association between low skeletal muscle mass and cognitive function. J Gerontol A Biol Sci Med Sci 2022; 77:1959-1968. [PMID: 35661882 PMCID: PMC9536455 DOI: 10.1093/gerona/glac121] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Indexed: 11/15/2022] Open
Abstract
Low skeletal muscle mass is associated with cognitive impairment and dementia in older adults. This review describes the possible underlying pathophysiological mechanisms: systemic inflammation, insulin metabolism, protein metabolism, and mitochondrial function. We hypothesize that the central tenet in this pathophysiology is the dysfunctional myokine secretion consequent to minimal physical activity. Myokines, such as fibronectin type III domain containing 5/irisin and cathepsin B, are released by physically active muscle and cross the blood–brain barrier. These myokines upregulate local neurotrophin expression such as brain-derived neurotrophic factor (BDNF) in the brain microenvironment. BDNF exerts anti-inflammatory effects that may be responsible for neuroprotection. Altered myokine secretion due to physical inactivity exacerbates inflammation and impairs muscle glucose metabolism, potentially affecting the transport of insulin across the blood–brain barrier. Our working model also suggests other underlying mechanisms. A negative systemic protein balance, commonly observed in older adults, contributes to low skeletal muscle mass and may also reflect deficient protein metabolism in brain tissues. As a result of age-related loss in skeletal muscle mass, decrease in the abundance of mitochondria and detriments in their function lead to a decrease in tissue oxidative capacity. Dysfunctional mitochondria in skeletal muscle and brain result in the excessive production of reactive oxygen species, which drives tissue oxidative stress and further perpetuates the dysfunction in mitochondria. Both oxidative stress and accumulation of mitochondrial DNA mutations due to aging drive cellular senescence. A targeted approach in the pathophysiology of low muscle mass and cognition could be to restore myokine balance by physical activity.
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Affiliation(s)
- Susanne Janette Oudbier
- Amsterdam UMC location Vrije Universiteit Amsterdam, Department of Outpatient Clinics, Amsterdam Public Health research institute, De Boelelaan, Amsterdam, The Netherlands
| | - Jorming Goh
- Healthy Longevity Translational Research Program and Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Centre for Healthy Longevity, @AgeSingapore, National University Health System, Singapore
| | | | - Esmee Mariëlle Reijnierse
- Amsterdam UMC location Vrije Universiteit Amsterdam, Rehabilitation Medicine, De Boelelaan, Amsterdam, The Netherlands.,Amsterdam Movement Sciences, Ageing & Vitality, Amsterdam, The Netherlands.,Department of Medicine and Aged Care, @AgeMelbourne, The Royal Melbourne Hospital, The University of Melbourne, Parkville, Victoria, Australia
| | - Carolus Gerardus Maria Meskers
- Amsterdam UMC location Vrije Universiteit Amsterdam, Rehabilitation Medicine, De Boelelaan, Amsterdam, The Netherlands.,Amsterdam Movement Sciences, Ageing & Vitality, Amsterdam, The Netherlands
| | - Andrea Britta Maier
- Healthy Longevity Translational Research Program and Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Department of Medicine and Aged Care, @AgeMelbourne, The Royal Melbourne Hospital, The University of Melbourne, Parkville, Victoria, Australia.,Department of Human Movement Sciences, @AgeAmsterdam, Faculty of Behavioral and Movement Sciences, VU University Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
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Young JA, Zhu S, List EO, Duran-Ortiz S, Slama Y, Berryman DE. Musculoskeletal Effects of Altered GH Action. Front Physiol 2022; 13:867921. [PMID: 35665221 PMCID: PMC9160929 DOI: 10.3389/fphys.2022.867921] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 04/25/2022] [Indexed: 12/17/2022] Open
Abstract
Growth hormone (GH) is a peptide hormone that can signal directly through its receptor or indirectly through insulin-like growth factor 1 (IGF-1) stimulation. GH draws its name from its anabolic effects on muscle and bone but also has distinct metabolic effects in multiple tissues. In addition to its metabolic and musculoskeletal effects, GH is closely associated with aging, with levels declining as individuals age but GH action negatively correlating with lifespan. GH’s effects have been studied in human conditions of GH alteration, such as acromegaly and Laron syndrome, and GH therapies have been suggested to combat aging-related musculoskeletal diseases, in part, because of the decline in GH levels with advanced age. While clinical data are inconclusive, animal models have been indispensable in understanding the underlying molecular mechanisms of GH action. This review will provide a brief overview of the musculoskeletal effects of GH, focusing on clinical and animal models.
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Affiliation(s)
- Jonathan A. Young
- Heritage College of Osteopathic Medicine, Ohio University, Athens, OH, United States
| | - Shouan Zhu
- Heritage College of Osteopathic Medicine, Ohio University, Athens, OH, United States
- Ohio Musculoskeletal and Neurological Institute, Heritage College of Osteopathic Medicine, Athens, OH, United States
- Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH, United States
| | - Edward O. List
- Edison Biotechnology Institute, Ohio University, Athens, OH, United States
| | | | - Yosri Slama
- Edison Biotechnology Institute, Ohio University, Athens, OH, United States
| | - Darlene E. Berryman
- Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH, United States
- Edison Biotechnology Institute, Ohio University, Athens, OH, United States
- *Correspondence: Darlene E. Berryman,
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