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Waters TL, Winter JE, Delvadia BP, May DS, O’Brien MJ, Savoie FH, Sherman WF. Initiating Testosterone Therapy Without Indication for Treatment of Low Testosterone Is Associated With Higher Risk of Tendon Tear. Sports Health 2025:19417381251334083. [PMID: 40296344 PMCID: PMC12040848 DOI: 10.1177/19417381251334083] [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: 04/30/2025] Open
Abstract
BACKGROUND Studies have demonstrated an increasing rate of testosterone supplementation in patients who do not meet criteria for testosterone deficiency, but the risks associated with testosterone supplementation are unclear. HYPOTHESIS Patients initiating testosterone therapy would be diagnosed with significantly more tendon tears and undergo significantly more tendon repairs than matched controls never on testosterone therapy. STUDY DESIGN Cohort study. LEVEL OF EVIDENCE Level 3. METHODS Male patients who initiated testosterone therapy within 30 days of a primary care visit and who did not meet criteria for treatment of low testosterone were identified (n = 112,242). Propensity score matching generated a control cohort (n = 448,968) with no history of testosterone therapy and based on several comorbidities at the time of said age-matched primary care visit. Rates of tendon tears and tendon repairs within 1 and 2 years after primary care visit were compared using multivariable logistic regression. RESULTS Within 1 and 2 years, compared with controls, the testosterone supplementation cohort demonstrated significantly higher rates of rotator cuff tear (odds ratio [OR], 1.35; OR, 1.31), patellar tendon tear (OR, 2.06; OR, 2.14), and any tendon tear (OR, 1.33; OR, 1.31). The testosterone supplementation cohort demonstrated significantly higher rates of quadriceps tendon tears within 1 year (OR, 1.59). Within 1 and 2 years, compared with controls, the testosterone supplementation cohort demonstrated significantly higher rates of rotator cuff repair (OR, 1.28; OR, 1.23), distal biceps tendon repair (OR, 1.65; OR, 1.54), patellar tendon repair (OR, 2.28; OR, 2.18), and any tendon repair (OR, 1.27; OR, 1.23). CONCLUSION Testosterone supplementation is associated with an increased risk of tendon tears and repairs for at least the first and second year after initiating therapy in patients with no documented laboratory testing. Patients considering testosterone therapy should be counseled on this increased risk of tendon injury.
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Affiliation(s)
- Timothy L. Waters
- Department of Orthopaedic Surgery, Tulane University School of Medicine, New Orleans, Louisiana
| | - Julianna E. Winter
- Department of Orthopaedic Surgery, Tulane University School of Medicine, New Orleans, Louisiana
| | - Bela P. Delvadia
- Department of Orthopaedic Surgery, Tulane University School of Medicine, New Orleans, Louisiana
| | - David S. May
- Department of Orthopaedic Surgery, Tulane University School of Medicine, New Orleans, Louisiana
| | - Michael J. O’Brien
- Department of Orthopaedic Surgery, Tulane University School of Medicine, New Orleans, Louisiana
| | - Felix H. Savoie
- Department of Orthopaedic Surgery, Tulane University School of Medicine, New Orleans, Louisiana
| | - William F. Sherman
- Department of Orthopaedic Surgery, Tulane University School of Medicine, New Orleans, Louisiana
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Hold LA, Phillips T, Cordts P, Steltzer SS, Bae SH, Henry BW, Migotsky N, Grossman S, Cruz CD, Padmanabhan V, Moravek MB, Shikanov A, Abraham AC, Killian ML. Functional changes to Achilles tendon and enthesis in an adolescent mouse model of testosterone hormone therapy. Connect Tissue Res 2025; 66:96-106. [PMID: 40019025 PMCID: PMC12105046 DOI: 10.1080/03008207.2025.2465322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2024] [Accepted: 02/05/2025] [Indexed: 03/01/2025]
Abstract
PURPOSE/AIM Some youth seek puberty suppression to prolong decision-making prior to starting hormone therapy to help align their physical sex characteristics with their gender identity. During peripubertal growth, connective tissues such as tendon rapidly adapt to applied mechanical loads (e.g. exercise) yet if and how tendon adaptation is influenced by sex and gender-affirming hormone therapy during growth remains unknown. The goal of this study was to understand how pubertal suppression followed by testosterone influences the structural and functional properties of the Achilles tendon using an established adolescent mouse model of testosterone hormone therapy. MATERIALS AND METHODS C57BL/6N female mice were assigned at postnatal day 26 to the following experimental groups: control (vehicle treated), gonadotropin release hormone analogue (GnRHa) treatment alone to delay puberty, testosterone (T) alone after puberty, or delayed puberty with T treatment (i.e. GnRHa followed by T). RESULTS We found that pubertal suppression using GnRHa with and without T, as well as treatment with T alone post-puberty, increased the ultimate load of tendon in female mice. Additionally, we found that GnRHa, but not T treatment resulted in a significant increase in cell density at the Achilles enthesis. CONCLUSIONS These findings demonstrate that delayed puberty and T have no negative influence on structural or functional properties of mouse tendon.
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Affiliation(s)
- LeeAnn A. Hold
- Department of Molecular and Integrative Physiology, Michigan Medicine, Ann Arbor, MI, USA
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, MI, USA
| | - Tessa Phillips
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, MI, USA
- College of Medicine, University of Toledo, Toledo, OH, USA
| | - Paige Cordts
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, MI, USA
| | - Stephanie S. Steltzer
- Department of Molecular and Integrative Physiology, Michigan Medicine, Ann Arbor, MI, USA
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, MI, USA
| | - Seung-Ho Bae
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, MI, USA
| | - Brandon W. Henry
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, MI, USA
- College of Osteopathic Medicine, Michigan State University, East Lansing, MI, USA
| | - Nicole Migotsky
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, MI, USA
| | - Sydney Grossman
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, MI, USA
| | - Cynthia Dela Cruz
- Department of Biomedical Engineering, Michigan Medicine, Ann Arbor, MI, USA
| | - Vasantha Padmanabhan
- Department of Molecular and Integrative Physiology, Michigan Medicine, Ann Arbor, MI, USA
- Department of Pediatrics, Michigan Medicine, Ann Arbor, MI, USA
- Department of Obstetrics and Gynecology, Michigan Medicine, Ann Arbor, MI, USA
| | - Molly B. Moravek
- Department of Obstetrics and Gynecology, Michigan Medicine, Ann Arbor, MI, USA
- Department of Women’s Health, Henry Ford Health, East Lansing, MI, USA
- Department of Obstetrics, Gynecology, and Reproductive Biology, College of Human Medicine, Michigan State University, East Lansing, MI, USA
| | - Ariella Shikanov
- Department of Biomedical Engineering, Michigan Medicine, Ann Arbor, MI, USA
- Department of Obstetrics and Gynecology, Michigan Medicine, Ann Arbor, MI, USA
| | - Adam C. Abraham
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, MI, USA
| | - Megan L. Killian
- Department of Molecular and Integrative Physiology, Michigan Medicine, Ann Arbor, MI, USA
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, MI, USA
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3
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Hold LA, Phillips T, Cordts P, Steltzer S, Bae SH, Henry B, Migotsky N, Grossman S, Cruz CD, Padmanabhan V, Moravek M, Shikanov A, Abraham AC, Killian ML. Functional Changes to Achilles Tendon and Enthesis in a Mouse Model of an Adolescent Masculine Gender-Affirming Hormone Treatment. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.10.598308. [PMID: 38915724 PMCID: PMC11195120 DOI: 10.1101/2024.06.10.598308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
Many transgender youth seek gender affirming care, such as puberty suppression, to prolong decision-making and to align their physical sex characteristics with their gender identity. During peripubertal growth, connective tissues such as tendon rapidly adapt to applied mechanical loads (e.g., exercise) yet if and how tendon adaptation is influenced by sex and gender affirming hormone therapy during growth remains unknown. The goal of this study was to understand the how pubertal suppression influences the structural and functional properties of the Achilles tendon using an established mouse model of transmasculine gender affirming hormone therapy. C57BL/6N female-born mice were assigned to experimental groups to mimic gender-affirming hormone therapy in human adolescents, and treatment was initiated prior to the onset of puberty (at postnatal day 26, P26). Experimental groups included controls and mice serially treated with gonadotropin release hormone analogue (GnRHa), delayed Testosterone (T), or GnRHa followed by T. We found that puberty suppression using GnRHa, with and without T, improved the overall tendon load capacity in female-born mice. Treatment with T resulted in an increase in the maximum load that tendon can withstand before failure. Additionally, we found that GnRHa, but not T, treatment resulted in a significant increase in cell density at the Achilles enthesis.
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Affiliation(s)
- LeeAnn A. Hold
- Department of Molecular and Integrative Physiology, Michigan Medicine, Ann Arbor Michigan, United States
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, Michigan, United States
| | - Tessa Phillips
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, Michigan, United States
- University of Toledo College of Medicine, Toledo, Ohio, United States
| | - Paige Cordts
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, Michigan, United States
| | - Steph Steltzer
- Department of Molecular and Integrative Physiology, Michigan Medicine, Ann Arbor Michigan, United States
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, Michigan, United States
| | - Seung-Ho Bae
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, Michigan, United States
| | - Brandon Henry
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, Michigan, United States
- Michigan State College of Osteopathic Medicine, East Lansing, MI, United States
| | - Nicole Migotsky
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, Michigan, United States
| | - Sydney Grossman
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, Michigan, United States
| | - Cynthia Dela Cruz
- Department of Biomedical Engineering, Michigan Medicine, Ann Arbor, Michigan, United States
| | - Vasantha Padmanabhan
- Department of Biomedical Engineering, Michigan Medicine, Ann Arbor, Michigan, United States
| | - Molly Moravek
- Department of Biomedical Engineering, Michigan Medicine, Ann Arbor, Michigan, United States
| | - Ariella Shikanov
- Department of Biomedical Engineering, Michigan Medicine, Ann Arbor, Michigan, United States
- Department of Obstetrics and Gynecology, Michigan Medicine, Ann Arbor, Michigan, United States
| | - Adam C. Abraham
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, Michigan, United States
| | - Megan L. Killian
- Department of Molecular and Integrative Physiology, Michigan Medicine, Ann Arbor Michigan, United States
- Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, Michigan, United States
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Stojko M, Nocoń J, Piłat P, Szpila G, Smolarczyk J, Żmudka K, Moll M, Hawranek M. Innovative Reports on the Effects of Anabolic Androgenic Steroid Abuse-How to Lose Your Mind for the Love of Sport. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:1439. [PMID: 37629729 PMCID: PMC10456445 DOI: 10.3390/medicina59081439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 07/25/2023] [Accepted: 08/04/2023] [Indexed: 08/27/2023]
Abstract
Anabolic-androgenic steroids (anabolic-androgenic steroids, AAS) are testosterone-derived compounds whose popularity and use are constantly growing. Chronic use of AAS leads to many hormonal and metabolic disorders in the human body, which often lead to permanent health damage. Changes affect the following systems: cardiovascular, musculoskeletal, reproductive, digestive, and nervous. We decided to collect the existing knowledge in the literature and enrich it with the latest research reports in the field of degenerative effects of AAS on the nervous system. The work aimed to increase public awareness of the dangers and consequences of AAS use and improve it with the latest research on the neurodegenerative effects of AAS. We hope that our work will contribute to raising public awareness and reducing the use of AAS.
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Affiliation(s)
- Michał Stojko
- Student’s Scientific Society, III Department of Cardiology, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, 40-055 Katowice, Poland
| | - Jakub Nocoń
- Student’s Scientific Society, Department of Psychiatry, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, 40-055 Katowice, Poland
| | - Patrycja Piłat
- Student’s Scientific Society, III Department of Cardiology, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, 40-055 Katowice, Poland
| | - Gabriela Szpila
- Student’s Scientific Society, Department of Psychiatry, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, 40-055 Katowice, Poland
| | - Joanna Smolarczyk
- Department of Psychiatry, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, 50-055 Katowice, Poland
| | - Karol Żmudka
- Student’s Scientific Society, Department of Psychiatry, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, 40-055 Katowice, Poland
| | - Martyna Moll
- Student’s Scientific Society, Department of Psychiatry, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, 40-055 Katowice, Poland
| | - Michał Hawranek
- III Department of Cardiology, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, 40-055 Katowice, Poland
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Vieira L, Silva PE, de Melo PF, Maldaner V, Durigan JQ, Marqueti RDC, Nobrega O, Mathur S, Burtin C, Barin F, Machado-Silva W, Ramalho S, Chiappa GR, Gomes NO, Carvalho CRF, Cipriano GFB, Cipriano G. Early Neuromuscular Electrical Stimulation Preserves Muscle Size and Quality and Maintains Systemic Levels of Signaling Mediators of Muscle Growth and Inflammation in Patients with Traumatic Brain Injury: A Randomized Clinical Trial. Crit Care Res Pract 2023; 2023:9335379. [PMID: 37547450 PMCID: PMC10397495 DOI: 10.1155/2023/9335379] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 08/15/2022] [Accepted: 06/26/2023] [Indexed: 08/08/2023] Open
Abstract
Objective To investigate the effects of an early neuromuscular electrical stimulation (NMES) protocol on muscle quality and size as well as signaling mediators of muscle growth and systemic inflammation in patients with traumatic brain injury (TBI). Design Two-arm, single-blinded, parallel-group, randomized, controlled trial with a blinded assessment. Setting. Trauma intensive care unit at a university hospital. Participants. Forty consecutive patients on mechanical ventilation (MV) secondary to TBI were prospectively recruited within the first 24 hours following admission. Interventions. The intervention group (NMES; n = 20) received a daily session of NMES on the rectus femoris muscle for five consecutive days (55 min/each session). The control group (n = 20) received usual care. Main Outcome Measures. Muscle echogenicity and thickness were evaluated by ultrasonography. A daily blood sample was collected to assess circulating levels of insulin-like growth factor I (IGF-I), inflammatory cytokines, and matrix metalloproteinases (MMP). Results Both groups were similar at baseline. A smaller change in muscle echogenicity and thickness (difference between Day 1 and Day 7) was found in the control group compared to the NMES group (29.9 ± 2.1 vs. 3.0 ± 1.2, p < 0.001; -0.79 ± 0.12 vs. -0.01 ± 0.06, p < 0.001, respectively). Circulating levels of IGF-I, pro-inflammatory cytokines (IFN-y), and MMP were similar between groups. Conclusion An early NMES protocol can preserve muscle size and quality and maintain systemic levels of signaling mediators of muscle growth and inflammation in patients with TBI. This trial is registered with https://www.ensaiosclinicos.gov.br under number RBR-2db.
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Affiliation(s)
- Luciana Vieira
- University of Brasilia, Faculty of Ceilãndia, Sciences and Technologies in Health Program (PPGCTS), Brasília, DF, Brazil
- Physical Therapy Division, Hospital de Base do Distrito Federal, Brasília, DF, Brazil
| | - Paulo Eugênio Silva
- University of Brasilia, Faculty of Ceilãndia, Sciences and Technologies in Health Program (PPGCTS), Brasília, DF, Brazil
- Physical Therapy Division, Hospital de Base do Distrito Federal, Brasília, DF, Brazil
| | - Priscilla Flavia de Melo
- University of Brasilia, Faculty of Ceilãndia, Sciences and Technologies in Health Program (PPGCTS), Brasília, DF, Brazil
- Physical Therapy Division, Hospital de Base do Distrito Federal, Brasília, DF, Brazil
| | - Vinicius Maldaner
- University of Brasilia, Faculty of Ceilãndia, Sciences and Technologies in Health Program (PPGCTS), Brasília, DF, Brazil
- Human Movement and Rehabilitation Program, UniEVANGÉLICA, Anápolis, GO, Brazil
| | - Joao Q. Durigan
- University of Brasilia, Faculty of Ceilãndia, Sciences and Technologies in Health Program (PPGCTS), Brasília, DF, Brazil
- University of Brasilia, Faculty of Ceilãndia, Rehabilitation Sciences Program (PPGCR), Brasília, DF, Brazil
| | - Rita de Cassia Marqueti
- University of Brasilia, Faculty of Ceilãndia, Sciences and Technologies in Health Program (PPGCTS), Brasília, DF, Brazil
- University of Brasilia, Faculty of Ceilãndia, Rehabilitation Sciences Program (PPGCR), Brasília, DF, Brazil
| | - Otavio Nobrega
- University of Brasilia, Faculty of Ceilãndia, Sciences and Technologies in Health Program (PPGCTS), Brasília, DF, Brazil
- Medical Sciences Graduate Program (PPGCM), University of Brasilia (UnB), Brasília, DF, Brazil
| | - Sunita Mathur
- School of Rehabilitation Therapy, Queen's University, Kingston, ON, Canada
| | - Chris Burtin
- Rehabilitation Research Centre, Biomedical Research Institute, Faculty of Rehabilitation Sciences, Hasselt University, Hasselt, Belgium
| | - Fabrício Barin
- University of Brasilia, Faculty of Ceilãndia, Sciences and Technologies in Health Program (PPGCTS), Brasília, DF, Brazil
| | - Wilcelly Machado-Silva
- University of Brasilia, Faculty of Ceilãndia, Sciences and Technologies in Health Program (PPGCTS), Brasília, DF, Brazil
| | - Sergio Ramalho
- University of Brasilia, Faculty of Ceilãndia, Sciences and Technologies in Health Program (PPGCTS), Brasília, DF, Brazil
| | - Gaspar R. Chiappa
- Human Movement and Rehabilitation Program, UniEVANGÉLICA, Anápolis, GO, Brazil
| | | | | | - Graziella F. B. Cipriano
- University of Brasilia, Faculty of Ceilãndia, Sciences and Technologies in Health Program (PPGCTS), Brasília, DF, Brazil
- University of Brasilia, Faculty of Ceilãndia, Rehabilitation Sciences Program (PPGCR), Brasília, DF, Brazil
| | - Gerson Cipriano
- University of Brasilia, Faculty of Ceilãndia, Sciences and Technologies in Health Program (PPGCTS), Brasília, DF, Brazil
- Human Movement and Rehabilitation Program, UniEVANGÉLICA, Anápolis, GO, Brazil
- University of Brasilia, Faculty of Ceilãndia, Rehabilitation Sciences Program (PPGCR), Brasília, DF, Brazil
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6
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Rebello E, Albright JA, Testa EJ, Alsoof D, Daniels AH, Arcand M. The use of prescription testosterone is associated with an increased likelihood of experiencing a distal biceps tendon injury and subsequently requiring surgical repair. J Shoulder Elbow Surg 2023; 32:1254-1261. [PMID: 36918119 DOI: 10.1016/j.jse.2023.02.122] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/25/2023] [Accepted: 02/04/2023] [Indexed: 03/16/2023]
Abstract
BACKGROUND In the United States, the use of testosterone therapy has increased over recent years. Anabolic steroid use has been associated with tendon rupture, although there is a paucity of evidence evaluating the risk of biceps tendon injury (BTI) with testosterone therapy. The aim of this study was to quantify the risk of BTI after the initiation of testosterone therapy. METHODS This was a retrospective cohort study using the PearlDiver database. Records between 2011 and 2018 were queried to identify patients aged 35-75 years who filled a testosterone prescription for a minimum of 3 months. A control group was created, comprising patients aged 35-75 years who had never filled a prescription for exogenous testosterone. International Classification of Diseases, Ninth Revision, International Classification of Diseases, Tenth Revision, and Current Procedural Terminology codes were used to identify patients with distal biceps injuries and those undergoing surgical repair. Three matching processes were completed: one for the overall cohort, one for the cohort comprising only male patients, and one for the cohort comprising only female patients. Each cohort was matched to its control on age, sex, Charlson Comorbidity Index, diabetes, tobacco use, and osteoporosis. Multivariate logistic regression was used to compare rates of distal BTI and subsequent surgical repair in the testosterone groups with their control groups. RESULTS A total of 776,974 patients had filled a prescription for testosterone for a minimum of 3 consecutive months. In the overall matched analysis between the testosterone and control groups (n = 291,610 in both), the mean age of the patients was 53.9 years and 23.1% were women. Within 1 year of filling exogenous testosterone prescriptions for a minimum of 3 consecutive months, 650 patients experienced a distal BTI compared with 159 patients in the control group (odds ratio [OR], 4.10; 95% confidence interval [CI], 3.45-4.89; P < .001). At any time after testosterone therapy, patients with testosterone use were more than twice as likely to experience a distal BTI as their matched controls (OR, 2.07; 95% CI, 1.94-2.38). Patients who filled prescriptions for testosterone were more likely to undergo surgical repair within a year of the injury compared with the control group. A similar trend was seen in the cohort comprising male patients (OR, 1.63; 95% CI, 1.29-2.07). CONCLUSION Patients with prior prescription testosterone exposure have an increased rate of BTI and biceps tendon repair compared with patients without such exposure. This finding provides insight into the risk profile of testosterone therapy, and doctors should consider counseling patients about this risk, particularly male patients.
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Affiliation(s)
- Elliott Rebello
- Department of Orthopaedics, Brown University Warren Alpert Medical School, Providence, RI, USA.
| | - J Alex Albright
- Department of Orthopaedics, Brown University Warren Alpert Medical School, Providence, RI, USA
| | - Edward J Testa
- Department of Orthopaedics, Brown University Warren Alpert Medical School, Providence, RI, USA
| | - Daniel Alsoof
- Department of Orthopaedics, Brown University Warren Alpert Medical School, Providence, RI, USA
| | - Alan H Daniels
- Department of Orthopaedics, Brown University Warren Alpert Medical School, Providence, RI, USA
| | - Michel Arcand
- Department of Orthopaedics, Brown University Warren Alpert Medical School, Providence, RI, USA
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7
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Deriggi-Pisani GF, Stotzer US, Marqueti RC, Rodrigues MFC, Biffe BG, Silva KA, Fabricio V, Rosen CJ, Selistre-de-Araujo HS. Role of resistance training in bone macro and micro damages in an estrogen absence animal model. Life Sci 2023; 317:121417. [PMID: 36690246 DOI: 10.1016/j.lfs.2023.121417] [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: 10/07/2022] [Revised: 12/20/2022] [Accepted: 01/17/2023] [Indexed: 01/22/2023]
Abstract
AIMS We evaluated the effects of resistance training (RT) on bone properties, morphology, and bone extracellular matrix (ECM) remodeling markers in an ovariectomy (OVX) rat model. MAIN METHODS Thirty-six female rats were divided into four groups: sham sedentary, OVX sedentary, sham RT, and OVX RT. Rats performed RT for ten weeks, during which they climbed a ladder with progressive loads attached to the tail. Tibias were stored for dual-energy X-ray densitometry (DXA), micro-computed tomography (micro-CT), and biomechanical, biophysical, and biochemical analysis. Femurs were stored for morphological, gene expression, and gelatin zymography analysis. KEY FINDINGS OVX decreased bone mineral density, stiffness, maximal load, and calcium content, which was reversed by RT. The trabecular number, connectivity, and MMP-13 gene expression decreased in OVX groups. Furthermore, OVX increased run-related transcription factor-2 (RUNX-2) and osteoprotegerin (OPG) gene expression, and increased the number of adipocytes in bone marrow and MMP-2 activity. SIGNIFICANCE RT was efficient in preventing or reversing changes in bone biomechanical properties in OVX groups, improving fracture load and resilience, which is relevant to prevent fractures. On the other hand, RT did not decrease the number of bone adipocytes in the OVX-RT group. However, RT was efficient for increasing trabecular thickness and cortical bone volume, which improved bone resistance. Our findings provide further insights into the mechanisms involved in the role of RT in OVX damage protection.
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Affiliation(s)
- Graziéle F Deriggi-Pisani
- Laboratório de Bioquímica e Biologia Molecular, Departamento de Ciências Fisiológicas, Universidade Federal de São Carlos (UFSCar), São Carlos, São Paulo, Brazil.
| | - Uliana S Stotzer
- Laboratório de Bioquímica e Biologia Molecular, Departamento de Ciências Fisiológicas, Universidade Federal de São Carlos (UFSCar), São Carlos, São Paulo, Brazil
| | - Rita C Marqueti
- Laboratório de Análises Moleculares - LAM, Faculdade de Ceilândia, Universidade de Brasília (UnB), Distrito Federal, Brazil
| | - Maria F C Rodrigues
- Laboratório de Bioquímica e Biologia Molecular, Departamento de Ciências Fisiológicas, Universidade Federal de São Carlos (UFSCar), São Carlos, São Paulo, Brazil
| | - Bruna G Biffe
- Laboratório de Bioquímica e Biologia Molecular, Departamento de Ciências Fisiológicas, Universidade Federal de São Carlos (UFSCar), São Carlos, São Paulo, Brazil
| | - Karina A Silva
- Laboratório de Bioquímica e Biologia Molecular, Departamento de Ciências Fisiológicas, Universidade Federal de São Carlos (UFSCar), São Carlos, São Paulo, Brazil
| | - Victor Fabricio
- Laboratório de Bioquímica e Biologia Molecular, Departamento de Ciências Fisiológicas, Universidade Federal de São Carlos (UFSCar), São Carlos, São Paulo, Brazil
| | - Clifford J Rosen
- Maine Medical Center Research Institute, Scarborough, Maine, United States
| | - Heloisa Sobreiro Selistre-de-Araujo
- Laboratório de Bioquímica e Biologia Molecular, Departamento de Ciências Fisiológicas, Universidade Federal de São Carlos (UFSCar), São Carlos, São Paulo, Brazil
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8
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Anabolic Androgenic Steroids in Orthopaedic Surgery: Current Concepts and Clinical Applications. J Am Acad Orthop Surg Glob Res Rev 2022; 6:01979360-202201000-00001. [PMID: 34982051 PMCID: PMC8735789 DOI: 10.5435/jaaosglobal-d-21-00156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 11/05/2021] [Indexed: 12/24/2022]
Abstract
Despite the well-documented effects of testosterone and its synthetic derivatives—collectively termed anabolic androgenic steroids (AASs)—on the musculoskeletal system, the therapeutic use of these agents has received limited investigation within the field of orthopaedic surgery. In the last 2 decades, preclinical and clinical research has started to identify promising applications of the short-term use of AASs in the perioperative period. There is evidence to suggest that AASs may improve postoperative recovery after anterior cruciate ligament reconstruction and total joint arthroplasty. In addition, AASs may augment the biological healing environment in specific clinical scenarios including muscle injury, fracture repair, and rotator cuff repair. Current literature fails to present strong evidence for or against the use of AASs in orthopaedics, but there is continuous research on this topic. The purpose of this study was to provide a comprehensive overview of the current status of AAS applications in orthopaedic surgery, with an emphasis on preclinical data, clinical studies, and future directions.
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9
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Gould HP, Hawken JB, Duvall GT, Hammond JW. Asynchronous Bilateral Achilles Tendon Rupture with Selective Androgen Receptor Modulators: A Case Report. JBJS Case Connect 2021; 11:01709767-202106000-00015. [PMID: 33835995 DOI: 10.2106/jbjs.cc.20.00635] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
CASE A 36-year-old male competitive powerlifter sustained asynchronous bilateral Achilles tendon ruptures after using 2 types of selective androgen receptor modulators (SARMs). Both tendon ruptures occurred near the myotendinous junction and were treated with open surgical repair and an initial period of immobilization followed by progressive weightbearing and rehabilitation; no postoperative complications were observed. CONCLUSION Previous studies have reported that anabolic androgenic steroids have a deleterious impact on tendon structure and function. This case suggests that SARM compounds may also predispose users to Achilles tendon rupture.
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Affiliation(s)
- Heath P Gould
- Department of Orthopaedic Surgery, MedStar Union Memorial Hospital, Baltimore, Maryland
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Adverse Effects of Anabolic-Androgenic Steroids: A Literature Review. Healthcare (Basel) 2021; 9:healthcare9010097. [PMID: 33477800 PMCID: PMC7832337 DOI: 10.3390/healthcare9010097] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 01/03/2021] [Accepted: 01/11/2021] [Indexed: 12/19/2022] Open
Abstract
Anabolic-androgenic steroids (AASs) are a large group of molecules including endogenously produced androgens, such as testosterone, as well as synthetically manufactured derivatives. AAS use is widespread due to their ability to improve muscle growth for aesthetic purposes and athletes’ performance, minimizing androgenic effects. AAS use is very popular and 1–3% of US inhabitants have been estimated to be AAS users. However, AASs have side effects, involving all organs, tissues and body functions, especially long-term toxicity involving the cardiovascular system and the reproductive system, thereby, their abuse is considered a public health issue. The aim of the proposed review is to highlight the most recent evidence regarding the mechanisms of action of AASs and their unwanted effects on organs and lifestyle, as well as suggesting that AAS misuse and abuse lead to adverse effects in all body tissues and organs. Oxidative stress, apoptosis, and protein synthesis alteration are common mechanisms involved in AAS-related damage in the whole body. The cardiovascular system and the reproductive system are the most frequently involved apparatuses. Epidemiology as well as the molecular and pathological mechanisms involved in the neuropsychiatric side-effects of AAS abuse are still unclear, further research is needed in this field. In addition, diagnostically reliable tests for AAS abuse should be standardized. In this regard, to prevent the use of AASs, public health measures in all settings are crucial. These measures consist of improved knowledge among healthcare workers, proper doping screening tests, educational interventions, and updated legislation.
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11
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Vasilceac FA, Marqueti RDC, Neto IVDS, Nascimento DDC, Souza MCD, Durigan JLQ, Mattiello SM. Resistance training decreases matrix metalloproteinase-2 activity in quadriceps tendon in a rat model of osteoarthritis. Braz J Phys Ther 2020; 25:147-155. [PMID: 32276877 DOI: 10.1016/j.bjpt.2020.03.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 09/05/2019] [Accepted: 02/28/2020] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Osteoarthritis (OA) is a degenerative disease that induces peri-articular tissue degradation. OA induces an imbalance between synthesis and degradation of the extracellular matrix components in favor of catabolic events, promoting pathological remodeling and involving degradative enzymes, such as matrix metalloproteinases (MMPs). OBJECTIVE This study aimed to investigate the effects of 8-weeks resistance training (RT) on MMP-2 activity in the quadriceps tendon and patellar tendon in an OA model. METHODS Twenty-four Wistar rats were randomly divided into six groups: Control, Exercise, Sham, Sham with Exercise, OA, and OA with Exercise (OAE). The OA model was performed by anterior cruciate ligament transection surgery on the left knee. The 8-week RT consisted of climbing a 1.1-m vertical ladder three times per week with progressive weights secured to the animals' tails. MMP-2 activity was analyzed by zymography. RESULTS The OAE group displayed lower pro, intermediate, and active MMP-2 activity in the quadriceps tendon compared with the OA group (p<0.05). For the patellar tendon, there was no significant difference between the OAE group compared with the other groups (p>0.05) for pro, intermediate, and active MMP-2 activity. Moreover, MMP-2 activity differed between tissues, the OA and OAE groups presented lower pro, intermediate, and active MMP-2 activity in the quadriceps tendon compared to the patellar tendon. CONCLUSION RT induced down-regulated MMP-2 activity in the quadriceps tendon. RT is a potential therapeutic approach to minimize the deleterious effects of extracellular matrix degeneration.
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Affiliation(s)
- Fernando Augusto Vasilceac
- Graduate Program of Physical Therapy, Universidade Federal de São Carlos (UFSCar), São Carlos, São Paulo, Brazil
| | - Rita de Cássia Marqueti
- Graduate Program of Sciences and Technology of Health, Universidade de Brasília (UnB), Brasília, Distrito Federal, Brazil; Graduate Program in Rehabilitation Sciences, Universidade de Brasília (UnB), Brasília, Distrito Federal, Brazil.
| | - Ivo Vieira de Sousa Neto
- Graduate Program of Sciences and Technology of Health, Universidade de Brasília (UnB), Brasília, Distrito Federal, Brazil
| | - Dahan da Cunha Nascimento
- Graduate Program of Physical Education, Universidade Católica de Brasília (UCB), Brasília, Distrito Federal, Brazil; Department of Physical Education, Centro Universitário do Distrito Federal, Brasília, Distrito Federal, Brazil
| | - Mariana Carvalho de Souza
- Graduate Program of Physical Therapy, Universidade Federal de São Carlos (UFSCar), São Carlos, São Paulo, Brazil
| | - João Luiz Quaglioti Durigan
- Graduate Program of Sciences and Technology of Health, Universidade de Brasília (UnB), Brasília, Distrito Federal, Brazil; Graduate Program in Rehabilitation Sciences, Universidade de Brasília (UnB), Brasília, Distrito Federal, Brazil
| | - Stela Márcia Mattiello
- Graduate Program of Physical Therapy, Universidade Federal de São Carlos (UFSCar), São Carlos, São Paulo, Brazil
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Achilles Tendon Repair by Decellularized and Engineered Xenografts in a Rabbit Model. Stem Cells Int 2019; 2019:5267479. [PMID: 31558905 PMCID: PMC6735180 DOI: 10.1155/2019/5267479] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 07/01/2019] [Accepted: 07/10/2019] [Indexed: 01/13/2023] Open
Abstract
Tendon tissue ruptures often require the replacement of damaged tissues. The use of auto- or allografts is notoriously limited due to the scarce supply and the high risks of immune adverse reactions. To overcome these limitations, tissue engineering (TE) has been considered a promising approach. Among several biomaterials, decellularized xenografts are available in large quantity and could represent a possible solution for tendon reconstruction. The present study is aimed at evaluating TE xenografts in Achilles tendon defects. Specifically, the ability to enhance the biomechanical functionality, while improving the graft interaction with the host, was tested. The combination of decellularized equine-derived tendon xenografts with or without the matrix repopulation with autologous bone marrow mesenchymal stem cells (BMSCs) under stretch-perfusion dynamic conditions might improve the side-to-side tendon reconstruction. Thirty-six New Zealand rabbits were used to create 2 cm long segmental defects of the Achilles tendon. Then, animals were implanted with autograft (AG) as the gold standard control, decellularized graft (DG), or in vitro tissue-engineered graft (TEG) and evaluated postoperatively at 12 weeks. After sacrifice, histological, immunohistochemical, biochemical, and biomechanical analyses were performed along with the matrix metalloproteinases. The results demonstrated the beneficial role of undifferentiated BMSCs loaded within decellularized xenografts undergoing a stretch-perfusion culture as an immunomodulatory weapon reducing the inflammatory process. Interestingly, AG and TEG groups exhibited similar results, behaved similarly, and showed a significant superior tissue healing compared to DG in terms of newly formed collagen fibres and biomechanical parameters. Whereas, DG demonstrated a massive inflammatory and giant cell response associated with graft destruction and necrosis, absence of type I and III collagen, and a higher amount of proteoglycans and MMP-2, thus unfavourably affecting the biomechanical response. In conclusion, this in vivo study suggests a potential use of the proposed tissue-engineered constructs for tendon reconstruction.
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Androgen deprivation therapy and the risk of tenosynovitis in prostate cancer patients. Int Urol Nephrol 2019; 51:1113-1119. [PMID: 31111393 DOI: 10.1007/s11255-019-02152-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Accepted: 04/10/2019] [Indexed: 12/27/2022]
Abstract
OBJECTIVES Androgen deprivation therapy (ADT) use in prostate cancer (PCa) patients has been reported to have an association with rheumatoid arthritis. We aimed to assess the impact of ADT on the subsequent risk of tenosynovitis. METHODS Using data from the National Health Insurance Research Database of Taiwan between 2001 and 2013, 3309 patients with PCa were identified. Among them, 729 ADT patients comprised the study group with 729 matched non-ADT controls. We used a 1:1 propensity score matched analysis. The demographic characteristics and comorbidities of the patients were analyzed; Cox proportional hazards regression was used to calculate the hazard ratios (HR) for the risk of tenosynovitis. RESULTS There were 224 (15.3%) patients with newly diagnosed tenosynovitis. Compared with non-ADT patients, ADT patients had a lower risk of subsequent tenosynovitis with an adjusted HR of 0.38 [95% confidence interval (CI) 0.28-0.51; P < 0.001]. CONCLUSIONS ADT use apparently did not increase the risk of tenosynovitis in patients with PCa. Further studies are warranted to assess the clinical significance.
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Santana Oliveira AJ, Batista e Silva LL, Barin FR, Leite Pereira EC, Selistre-de-Araujo HS, de Cássia Marqueti R. Detraining and Anabolic-Androgenic Steroid Discontinuation Change Calcaneal Tendon Morphology. J Funct Morphol Kinesiol 2018; 4:jfmk4010001. [PMID: 33467316 PMCID: PMC7739234 DOI: 10.3390/jfmk4010001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 12/14/2018] [Accepted: 12/19/2018] [Indexed: 11/16/2022] Open
Abstract
Several side effects of anabolic-androgenic steroid (AAS) administration associated with training are reported in the biomechanical properties of the calcaneal tendon (CT) of rats. Thus, the aim of the present study is to evaluate the effects of the detraining and discontinuation of AAS administration on the CT morphology of rats submitted to exercise in water. Animals were divided into two groups (20/group): (1) Immediately after training (IA), and (2) Six weeks of detraining and AAS discontinuation (6W). The IA group included four subgroups: Sedentary (S), Trained (T), Sedentary with AAS administration (SAAS), and trained with AAS administration (TAAS). The 6W group included four subgroups: Sedentary (6W-S), six weeks of detrained (6W-T), six weeks of sedentary with AAS discontinuation (6W-SAAS), and six weeks of detrained with AAS discontinuation (6W-TAAS). Data show significant reduction in adipose cells volume density (Vv%) in the distal CT in 6W-TAAS group, indicating that training can exert a positive effect on the tendon. The 6W-SAAS group exhibited increased adipose cells Vv% in the distal region, compared with the W6-S and W6-T groups. A decrease in tendon proper cells Vv% and in peritendinous sheath cells Vv% of proximal and distal regions was also observed. In 6W-TAAS group showed increase in adipose cells, blood vessels, peritendinous sheath cells, and tendon proper cells Vv% in the distal region of the CT. The vertical jumps in water were not able to protect CT regions from the negative effects of AAS discontinuation for six weeks. However, after detraining and AAS discontinuation, many protective factors of the mechanical load in the long-term could be observed.
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Affiliation(s)
| | | | | | | | | | - Rita de Cássia Marqueti
- Faculty of Ceilândia, University of Brasília, Brasília, DF 72220-275, Brazil
- Correspondence: ; Tel.: +55-61-3107-8419
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Guzzoni V, Selistre-de-Araújo HS, Marqueti RDC. Tendon Remodeling in Response to Resistance Training, Anabolic Androgenic Steroids and Aging. Cells 2018; 7:E251. [PMID: 30544536 PMCID: PMC6316563 DOI: 10.3390/cells7120251] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 11/30/2018] [Accepted: 11/30/2018] [Indexed: 12/14/2022] Open
Abstract
Exercise training (ET), anabolic androgenic steroids (AAS), and aging are potential factors that affect tendon homeostasis, particularly extracellular matrix (ECM) remodeling. The goal of this review is to aggregate findings regarding the effects of resistance training (RT), AAS, and aging on tendon homeostasis. Data were gathered from our studies regarding the impact of RT, AAS, and aging on the calcaneal tendon (CT) of rats. We demonstrated a series of detrimental effects of AAS and aging on functional and biomechanical parameters, including the volume density of blood vessel cells, adipose tissue cells, tendon calcification, collagen content, the regulation of the major proteins related to the metabolic/development processes of tendons, and ECM remodeling. Conversely, RT seems to mitigate age-related tendon dysfunction. Our results suggest that AAS combined with high-intensity RT exert harmful effects on ECM remodeling, and also instigate molecular and biomechanical adaptations in the CT. Moreover, we provide further information regarding the harmful effects of AAS on tendons at a transcriptional level, and demonstrate the beneficial effects of RT against the age-induced tendon adaptations of rats. Our studies might contribute in terms of clinical approaches in favor of the benefits of ET against tendinopathy conditions, and provide a warning on the harmful effects of the misuse of AAS on tendon development.
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Affiliation(s)
- Vinicius Guzzoni
- Departamento de Biologia Molecular e Celular, Universidade Federal da Paraíba, João Pessoa 58051-970, Paraíba, Brazil.
| | | | - Rita de Cássia Marqueti
- Graduate Program of Rehabilitation Science, University of Brasilia, Distrito Federal, Brasília 70840-901, Distrito Federal, Brazil.
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Jones IA, Togashi R, Hatch GFR, Weber AE, Vangsness CT. Anabolic steroids and tendons: A review of their mechanical, structural, and biologic effects. J Orthop Res 2018; 36:2830-2841. [PMID: 30047601 DOI: 10.1002/jor.24116] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 07/13/2018] [Indexed: 02/04/2023]
Abstract
One of the suspected deleterious effects of androgenic-anabolic steroids (AAS) is the increased risk for tendon rupture. However, investigations to date have produced inconsistent results and it is still unclear how AAS influence tendons. A systematic review of the literature was conducted to identify studies that have investigated the mechanical, structural, or biologic effects that AAS have on tendons. In total, 18 highly heterogeneous studies were identified. Small animal studies made up the vast majority of published research, and contradictory results were reported frequently. All of the included studies focused on the potential deleterious effects that AAS have on tendon, which is striking given the recent use of AAS in patients following tendon injury. Rather than providing strong evidence for or against the use of AAS, this review highlights the need for additional research. Future studies investigating the use of AAS as a possible treatment for tendon injury/pathology are supported by reports suggesting that AAS may counteract the irreparable structural/functional changes that occur in the musculotendinous unit following rotator cuff tears, as well as studies suggesting that the purported deleterious effects on tendon may be transient. Other possible areas for future research are discussed in the context of key findings that may have implications for the therapeutic application of AAS. © 2018 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 36:2830-2841, 2018.
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Affiliation(s)
- Ian A Jones
- Department of Orthopaedic Surgery, Keck School of Medicine of USC, HCT 1520 San Pablo Street, Suite 2000, Los Angeles 90033, California
| | - Ryan Togashi
- Department of Orthopaedic Surgery, Keck School of Medicine of USC, HCT 1520 San Pablo Street, Suite 2000, Los Angeles 90033, California
| | - George F Rick Hatch
- Department of Orthopaedic Surgery, Keck School of Medicine of USC, HCT 1520 San Pablo Street, Suite 2000, Los Angeles 90033, California
| | - Alexander E Weber
- Department of Orthopaedic Surgery, Keck School of Medicine of USC, HCT 1520 San Pablo Street, Suite 2000, Los Angeles 90033, California
| | - C Thomas Vangsness
- Department of Orthopaedic Surgery, Keck School of Medicine of USC, HCT 1520 San Pablo Street, Suite 2000, Los Angeles 90033, California
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Vieira Ramos G, Choqueta de Toledo-Arruda A, Maria Pinheiro-Dardis C, Liyoko Suehiro C, Luiz de Russo T, Vieira RP, Arruda Martins M, Salvini TF, Durigan JLQ. Exercise Prevents Diaphragm Wasting Induced by Cigarette Smoke through Modulation of Antioxidant Genes and Metalloproteinases. BIOMED RESEARCH INTERNATIONAL 2018; 2018:5909053. [PMID: 29789801 PMCID: PMC5896353 DOI: 10.1155/2018/5909053] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 11/28/2017] [Indexed: 12/22/2022]
Abstract
BACKGROUND The present study aimed to analyze the effects of physical training on an antioxidant canonical pathway and metalloproteinases activity in diaphragm muscle in a model of cigarette smoke-induced chronic obstructive pulmonary disease (COPD). METHODS Male mice were randomized into control, smoke, exercise, and exercise + smoke groups, which were maintained in trial period of 24 weeks. Gene expression of kelch-like ECH-associated protein 1; nuclear factor erythroid-2 like 2; and heme-oxygenase1 by polymerase chain reaction was performed. Metalloproteinases 2 and 9 activities were analyzed by zymography. Exercise capacity was evaluated by treadmill exercise test before and after the protocol. RESULTS Aerobic training inhibited diaphragm muscle wasting induced by cigarette smoke exposure. This inhibition was associated with improved aerobic capacity in those animals that were submitted to 24 weeks of aerobic training, when compared to the control and smoke groups, which were not submitted to training. The aerobic training also downregulated the increase of matrix metalloproteinases (MMP-2 and MMP-9) and upregulated antioxidant genes, such as nuclear factor erythroid-2 like 2 (NRF2) and heme-oxygenase1 (HMOX1), in exercise + smoke group compared to smoke group. CONCLUSIONS Treadmill aerobic training protects diaphragm muscle wasting induced by cigarette smoke exposure involving upregulation of antioxidant genes and downregulation of matrix metalloproteinases.
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Affiliation(s)
- Gracielle Vieira Ramos
- Physical Therapy Division, University of Brasília and Department of Physical Therapy, Universidade Paulista, Brasília, DF, Brazil
| | - Alessandra Choqueta de Toledo-Arruda
- Department of Medicine (LIM 20), School of Medicine, University of Sao Paulo, Sao Paulo, SP, Brazil
- Postgraduate Program in Sciences of Human Movement and Rehabilitation, Federal University of São Paulo (UNIFESP), Av. Ana Costa 95, 11060-001 Santos, SP, Brazil
| | | | - Camila Liyoko Suehiro
- Department of Medicine (LIM 20), School of Medicine, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Thiago Luiz de Russo
- Department of Physical Therapy, Federal University of São Carlos, São Carlos, SP, Brazil
| | - Rodolfo Paula Vieira
- Postgraduate Program in Sciences of Human Movement and Rehabilitation, Federal University of São Paulo (UNIFESP), Av. Ana Costa 95, 11060-001 Santos, SP, Brazil
- Postgraduate Program in Bioengineering, Universidade Brasil, Rua Carolina Fonseca 235, Itaquera, 08230-030 São Paulo, SP, Brazil
- Brazilian Institute of Teaching and Research in Pulmonary and Exercise Immunology (IBEPIPE), Rua Pedro Ernesto 240, 12245-520 São José dos Campos, SP, Brazil
| | - Milton Arruda Martins
- Department of Medicine (LIM 20), School of Medicine, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Tania Fátima Salvini
- Department of Physical Therapy, Federal University of São Carlos, São Carlos, SP, Brazil
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Effect of different resistance-training protocols on the extracellular matrix of the calcaneal tendon of rats. Ann Anat 2017; 216:75-81. [PMID: 29229272 DOI: 10.1016/j.aanat.2017.11.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 08/08/2017] [Accepted: 11/08/2017] [Indexed: 01/01/2023]
Abstract
The calcaneal tendon extracellular matrix (ECM) is composed of collagen, non-collagenous glycoproteins and proteoglycans, and able to adapt to various biomechanical stimuli. The objective of this study was to analyze the response of different resistance-training protocols, such as hypertrophy, strength and resistance, on the organization of the calcaneal tendon after training. Wistar rats were divided into four groups: untrained (UT), resistance training (RT), hypertrophy training (HT), and strength training (ST). The protocol in a vertical climbing platform was performed thrice per week over twelve weeks. For biochemical study, the tendons of each group were minced and analyzed for gelatinases, quantification of non-collagenous proteins, sulfated glycosaminoglycans, and hydroxyproline. For morphological analysis, sections were stained with HE and toluidine blue. Non-stained sections were used for birefringence analysis under polarization microscopy. The highest hydroxyproline concentrations were found in HT (154.8±14.2) and RT (173.6±25.2) compared with UT (122.4±27.0). A higher concentration of non-collagenous proteins was detected in the RT group (14.98mg/g) compared with the other groups. In polarization microscopy, major birefringence was observed in HT and the lowest in ST compared with UT, indicating higher organization of collagen bundles in HT. In analysis for zymography, the presence of latent MMP-9 was more prominent in the ST group and the active MMP-9 more prominent in the HT group. For MMP-2, significant differences in the latent isoform between the HT (184,867±6765) and UT (173,018±9696) groups were found. In sections stained with toluidine blue (TB), higher metachromasia was observed in the tendon's distal region in HT and RT groups, indicating a greater amount of proteoglycans. We conclude that the different training protocols produced different responses in the ECM. The remarkable presence of MMP-2 and -9 in the hypertrophy training group may be related to the highest organization of collagen bundles and possibly a more efficient remodeling process, observed in that group, as demonstrated by images and measurements of birefringence.
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Marqueti RC, Durigan JLQ, Oliveira AJS, Mekaro MS, Guzzoni V, Aro AA, Pimentel ER, Selistre-de-Araujo HS. Effects of aging and resistance training in rat tendon remodeling. FASEB J 2017; 32:353-368. [PMID: 28899880 DOI: 10.1096/fj.201700543r] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 08/28/2017] [Indexed: 12/21/2022]
Abstract
In elderly persons, weak tendons contribute to functional limitations, injuries, and disability, but resistance training can attenuate this age-related decline. We evaluated the effects of resistance training on the extracellular matrix (ECM) of the calcaneal tendon (CT) in young and old rats and its effect on tendon remodeling. Wistar rats aged 3 mo (young, n = 30) and 20 mo (old, n = 30) were divided into 4 groups: young sedentary, young trained, old sedentary (OS), and old trained (OT). The training sessions were conducted over a 12-wk period. Aging in sedentary rats showed down-regulation in key genes that regulated ECM remodeling. Moreover, the OS group showed a calcification focus in the distal region of the CT, with reduced blood vessel volume density. In contrast, resistance training was effective in up-regulating connective tissue growth factor, VEGF, and decorin gene expression in old rats. Resistance training also increased proteoglycan content in young and old rats in special small leucine-rich proteoglycans and blood vessels and prevented calcification in OT rats. These findings confirm that resistance training is a potential mechanism in the prevention of aging-related loss in ECM and that it attenuates the detrimental effects of aging in tendons, such as ruptures and tendinopathies.-Marqueti, R. C., Durigan, J. L. Q., Oliveira, A. J. S., Mekaro, M. S., Guzzoni, V., Aro, A. A., Pimentel, E. R., Selistre-de-Araujo, H. S. Effects of aging and resistance training in rat tendon remodeling.
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Affiliation(s)
- Rita C Marqueti
- University of Brasília (UnB), Brasília, Distrito Federal, Brazil;
| | - João L Q Durigan
- University of Brasília (UnB), Brasília, Distrito Federal, Brazil
| | | | | | - Vinicius Guzzoni
- Federal University of São Carlos (UFSCar), São Carlos, São Paulo, Brazil
| | - Andrea A Aro
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Edson Rosa Pimentel
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil.,Heminio Ometto University Center (UNIARARAS), Araras, São Paulo, Brazil
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Oliva F, Piccirilli E, Berardi AC, Frizziero A, Tarantino U, Maffulli N. Hormones and tendinopathies: the current evidence. Br Med Bull 2016; 117:39-58. [PMID: 26790696 DOI: 10.1093/bmb/ldv054] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/30/2015] [Indexed: 12/17/2022]
Abstract
BACKGROUND Tendinopathies negatively affect the quality of life of millions of people, but we still do not know the factors involved in the development of tendon conditions. SOURCES OF DATA Published articles in English in PubMed and Google Scholar up to June 2015 about hormonal influence on tendinopathies onset. One hundred and two papers were included following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. AREAS OF AGREEMENT In vitro and in vivo, tenocytes showed changes in their morphology and in their functional properties according to hormonal imbalances. AREAS OF CONTROVERSY Genetic pattern, sex, age and comorbidities can influence the hormonal effect on tendons. GROWING POINTS The increasing prevalence of metabolic disorders prompts to investigate the possible connection between metabolic problems and musculoskeletal diseases. AREAS TIMELY FOR DEVELOPING RESEARCH The influence of hormones on tendon structure and metabolism needs to be further investigated. If found to be significant, multidisciplinary preventive and therapeutic strategies should then be developed.
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Affiliation(s)
- Francesco Oliva
- Department of Orthopaedics and Traumatology, University of Rome 'Tor Vergata', Roma, Italy
| | - Eleonora Piccirilli
- School of Specialization of Orthopaedics and Traumatology, University of Rome 'Tor Vergata', Roma, Italy
| | - Anna C Berardi
- UOC Immunohematology and Transfusion Medicine Laboratories, Laboratory of Stem Cells, Spirito Santo Hospital, Pescara, Italy
| | - Antonio Frizziero
- Department of Physical and Rehabilitation Medicine, University of Padua, Padua, Italy
| | - Umberto Tarantino
- Department of Orthopaedics and Traumatology, University of Rome 'Tor Vergata', Roma, Italy
| | - Nicola Maffulli
- Centre for Sports and Exercise Medicine, Queen Mary University of London Barts, London, UK The London School of Medicine and Dentistry, Mile End Hospital London, London, UK Department of Physical and Rehabilitation Medicine, University of Salerno, Fisciano, Italy
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Marqueti RDC, Hashimoto NY, Durigan JLQ, Batista e Silva LL, Almeida JAD, Silva MDGD, Oliveira EMD, Araújo HSSD. Nandrolone increases angiotensin-I converting enzyme activity in rats tendons. REV BRAS MED ESPORTE 2015. [DOI: 10.1590/1517-869220152103143667] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION: The renin-angiotensin system (RAS) has been associated with several biological processes of the human body, regulating, among others blood pressure and water and electrolytes balance. Moreover, RAS also regulates connective tissue growth. Recently, studies have shown that the use of nandrolone modifies the angiotensin-I converting enzyme (ACE) activity and increases collagen deposition in the heart. OBJECTIVE: The aim of study was to evaluate the Angiotensin-I converting enzyme (ACE) activity in the superficial flexor tendon (SFT) and in serum after load exercise in combination with anabolic androgenic steroid (AAS) administration after training session and six weeks of detraining. METHODS: Forty-eight Wistar rats were used into two groups (G1 and G2) subdivided into four subgroups: Sedentary (S); trained (T); AAS-treated (Deca-Durabolin(r), 5mg/kg, twice a week) sedentary rats (AAS) and AAS-treated and trained animals (AAST). Trained groups performed jumps in water: four series of 10 jumps each, followed by a 30 sec interval between the series, for seven weeks. RESULTS: Training increased ACE activity in the SFT compared to the control group (p <0.05). Both AAS and AAST groups presented higher ACE activity levels (p < 0.05). The AAST increased the ACE activity only compared to the trained animals. Only the AAST group presented significant higher levels of ACE in the serum. In the G2 group, all experimental groups presented decreased ACE activity in the serum and in the tendon, as compared to the control group. CONCLUSION: This study indicates that AAS administration and its combination with exercise increased ACE activity of tendons. AAS abuse could compromise tendon adaptation causing maladaptive remodeling.
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Tsitsilonis S, Chatzistergos PE, Mitousoudis AS, Kourkoulis SK, Vlachos IS, Agrogiannis G, Fasseas K, Perrea DN, Zoubos AB. Anabolic androgenic steroids reverse the beneficial effect of exercise on tendon biomechanics: an experimental study. Foot Ankle Surg 2014; 20:94-9. [PMID: 24796826 DOI: 10.1016/j.fas.2013.12.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Revised: 09/09/2013] [Accepted: 12/05/2013] [Indexed: 02/04/2023]
Abstract
BACKGROUND The effect of anabolic androgenic steroids on tendons has not yet been fully elucidated. Aim of the present study was the evaluation of the impact of anabolic androgenic steroids on the biomechanical and histological characteristics of Achilles tendons. METHODS Twenty-four male Wistar rats were randomized into four groups with exercise and anabolic steroids (nandrolone decanoate) serving as variables. Protocol duration was 12 weeks. Following euthanasia, tendons' biomechanical properties were tested with the use of a modified clamping configuration. Histological examination with light and electron microscopy were also performed. RESULTS In the group of anabolic steroids and exercise the lowest fracture stress values were observed, while in the exercise group the highest ones. Histological examination by light and electron microscopy revealed areas of collagen dysplasia and an increased epitendon in the groups receiving anabolic steroids and exercise. CONCLUSIONS These findings suggest that anabolic androgenic steroids reverse the beneficial effect of exercise, thus resulting in inferior maximal stress values.
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Affiliation(s)
- Serafim Tsitsilonis
- Laboratory for Experimental Surgery and Surgical Research "N.S. Christeas", Athens Medical School, Agiou Thoma str. 15B, 11527 Athens, Greece; Charité - University Medicine Berlin, Center for Musculoskeletal Surgery, Augustenburger Platz 1, 13353 Berlin, Germany; Berlin-Brandenburg Center for Regenerative Therapies, Charité - University Medicine Berlin, Augustenburger Platz 1, 13353 Berlin, Germany.
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23
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Huisman ES, Andersson G, Scott A, Reno CR, Hart DA, Thornton GM. Regional molecular and cellular differences in the female rabbit Achilles tendon complex: potential implications for understanding responses to loading. J Anat 2014; 224:538-47. [PMID: 24571598 DOI: 10.1111/joa.12169] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/30/2014] [Indexed: 11/27/2022] Open
Abstract
The aim of this study was: (i) to analyze the morphology and expression of extracellular matrix genes in six different regions of the Achilles tendon complex of intact normal rabbits; and (ii) to assess the effect of ovariohysterectomy (OVH) on the regional expression of these genes. Female New Zealand White rabbits were separated into two groups: (i) intact normal rabbits (n = 4); and (ii) OVH rabbits (n = 8). For each rabbit, the Achilles tendon complex was dissected into six regions: distal gastrocnemius (DG); distal flexor digitorum superficialis; proximal lateral gastrocnemius (PLG); proximal medial gastrocnemius; proximal flexor digitorum superficialis; and paratenon. For each of the regions, hematoxylin and eosin staining was performed for histological evaluation of intact normal rabbit tissues and mRNA levels for proteoglycans, collagens and genes associated with collagen regulation were assessed by real-time reverse transcription-quantitative polymerase chain reaction for both the intact normal and OVH rabbit tissues. The distal regions displayed a more fibrocartilaginous phenotype. For intact normal rabbits, aggrecan mRNA expression was higher in the distal regions of the Achilles tendon complex compared with the proximal regions. Collagen Type I and matrix metalloproteinase-2 expression levels were increased in the PLG compared to the DG in the intact normal rabbit tissues. The tendons from OVH rabbits had lower gene expressions for the proteoglycans aggrecan, biglycan, decorin and versican compared with the intact normal rabbits, although the regional differences of increased aggrecan expression in distal regions compared with proximal regions persisted. The tensile and compressive forces experienced in the examined regions may be related to the regional differences found in gene expression. The lower mRNA expression of the genes examined in the OVH group confirms a potential effect of systemic estrogen on tendon.
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Affiliation(s)
- Elise S Huisman
- Department of Physical Therapy, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada; Centre for Hip Health and Mobility, Vancouver, BC, Canada
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24
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De Aro AA, Ferrucci DL, Borges FP, Stach-Machado DR, Macedo DV, Pimentel ER. Exhaustive exercise with different rest periods changes the collagen content and MMP-2 activation on the calcaneal tendon. Anat Rec (Hoboken) 2013; 297:281-8. [PMID: 24376193 DOI: 10.1002/ar.22842] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 10/03/2013] [Accepted: 11/06/2013] [Indexed: 11/10/2022]
Abstract
Tendons adapt to different mechanical stimuli through a remodeling process involving metalloproteinases (MMPs) and collagen synthesis. The purpose of this study was to investigate the activities of MMP-2 and MMP-9 and the collagen content in tendons after exhaustive acute exercise sessions over the course of 1, 3, or 6 days, with 1-hr or 3-hr rest periods between each session. Wistar rats were grouped into control (C), trained with 1-hr (groups 1d1h, 3d1h, and 6d1h) and trained with 3-hr (groups 1d3h, 3d3h and 6d3h) groups with rest periods between the treadmill running sessions, for 1, 3, and 6 days. The analysis of MMP-2 showed a larger presence of the latent isoform in the 1d3h group and a larger presence of the active isoform in the 6d3h group compared to the control. No differences were detected for MMP-9. A lower concentration of hydroxyproline was found in the 6d3h group compared to the 6d1h group. Sodium dodecyl sulfate polyacrylamide gel electrophoresis analysis showed more prominent collagen bands in the 6d3h group, which was confirmed by Western blotting for collagen type I. A higher concentration of glycosaminoglycans was observed in the 3d3h group compared to the 3d1h group, and the 6d3h group presented the highest value for non-collagenous proteins compared to other groups. In conclusion, different rest periods between exercise sessions had different effects on the composition of the calcaneal tendon because a greater activation of MMP-2 and a reduction of total collagen were observed on day 6 of exercise with 3-hr rest periods compared to 1-hr rest periods.
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Affiliation(s)
- Andrea Aparecida De Aro
- Department of Structural and Functional Biology, Institute of Biology, UNICAMP, Campinas, SP, Brazil
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25
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Marqueti RC, Paulino MG, Fernandes MN, de Oliveira EM, Selistre-de-Araujo HS. Tendon structural adaptations to load exercise are inhibited by anabolic androgenic steroids. Scand J Med Sci Sports 2013; 24:e39-51. [DOI: 10.1111/sms.12135] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/31/2013] [Indexed: 11/30/2022]
Affiliation(s)
- R. C. Marqueti
- Faculty of Ceilândia; University of Brasília; Brasilia DF Brazil
| | - M. G. Paulino
- Department of Physiological Sciences; Federal University of São Carlos; São Carlos SP Brazil
| | - M. N. Fernandes
- Department of Physiological Sciences; Federal University of São Carlos; São Carlos SP Brazil
| | - E. M. de Oliveira
- Laboratory of Biochemistry; School of Physical Education and Sports; University of São Paulo; São Paulo SP Brazil
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26
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Gene expression in distinct regions of rat tendons in response to jump training combined with anabolic androgenic steroid administration. Eur J Appl Physiol 2011; 112:1505-15. [PMID: 21842416 DOI: 10.1007/s00421-011-2114-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2011] [Accepted: 07/29/2011] [Indexed: 02/07/2023]
Abstract
The aim of this study was to evaluate the expression of key genes responsible for tendon remodeling of the proximal and distal regions of calcaneal tendon (CT), intermediate and distal region of superficial flexor tendon (SFT) and proximal, intermediate and distal region of deep flexor tendon (DFT) submitted to 7 weeks of jumping water load exercise in combination with AAS administration. Wistar male rats were grouped as follows: sedentary (S), trained (jumping water load exercise) (T), sedentary animals treated with AAS (5 mg/kg, twice a week) and animals treated with AAS and trained (AAST). mRNA levels of COL1A1, COL3A1, TIMP-1, TIMP-2, MMP-2, IGF-IEa, GAPDH, CTGF and TGF-β-1 were evaluated by quantitative PCR. Our main results indicated that mRNA levels alter in different regions in each tendon of sedentary animals. The training did not alter the expression of COL1A1, COL3A, IGF-IEa and MMP-2 genes, while AAS administration or its combination with training reduced their expression. This study indicated that exercise did not alter the expression of collagen and related growth factors in different regions of rat tendon. Moreover, the pattern of gene expression was distinct in the different tendon regions of sedentary animals. Although, the RNA yield levels of CT, SFT and DFT were not distinct in each region, these regions possess not only the structural and biochemical difference, but also divergence in the expression of key genes involved in tendon adaptation.
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Pereira GB, Prestes J, Leite RD, Magosso RF, Peixoto FS, Marqueti RDC, Shiguemoto GE, Selistre-de-Araújo HS, Baldissera V, Perez SEDA. Effects of ovariectomy and resistance training on MMP-2 activity in rat calcaneal tendon. Connect Tissue Res 2010; 51:459-66. [PMID: 20388014 DOI: 10.3109/03008201003676330] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Tendon remodeling relies on extracellular matrix (ECM) restructuring by the matrix metallopeptidases (MMPs). The aim of this study was to investigate MMP-2 activity in different regions of the calcaneal tendon (CT) after resistance training (RT) in ovariectomized rats. Wistar adult female rats were grouped into sedentary (Sed-Intact), ovariectomized sedentary (Sed-Ovx), acute exercise (AcuteEx-Intact), ovariectomized acute exercise (AcuteEx-Ovx), resistance trained (ChronicEx-Intact), and ovariectomized resistance trained (ChronicEx-Ovx) (n = 10 each group). The RT protocol required the animals to climb a 1.1-m vertical ladder with weights attached to their tail. The sessions were performed once every 3 days with 4-9 climbs and 8-12 dynamic movements per scaling. The acute groups performed one session and the chronic groups underwent 12 weeks of RT. There was an increase in total MMP-2 activity in Sed-Ovx, AcuteEx-Intact, and ChronicEx-Intact compared with that in Sed-Intact in the proximal region of CT. AcuteEx-Ovx exhibited higher total MMP-2 than Sed-Ovx and AcuteEx-Intact in the distal region of CT. Chronic-Ovx presented lower total MMP-2 activity than Sed-Ovx and Chronic-Intact in the distal region of tendon. The active MMP-2 was higher for the AcuteEx-Ovx than Sed-Ovx and AcuteEx-Intact in proximal region of tendon. There was higher active MMP-2 in the distal region of tendon in the Acute-Ovx than in the Sed-Ovx and AcuteEx-Intact. Ovariectomy and resistance exercise modulate MMP-2 activity according to specific tendon region, indicating a differentiated tissue remodeling.
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Prestes J, de Cássia Marqueti R, Shiguemoto GE, Leite RD, Pereira GB, Selistre-de-Araújo HS, Baldissera V, de Andrade Perez SE. Effects of ovariectomy and resistance training on MMP-2 activity in skeletal muscle. Appl Physiol Nutr Metab 2009; 34:700-6. [PMID: 19767806 DOI: 10.1139/h09-059] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Matrix metallopeptidases (MMPs) are crucial to the maintenance of healthy tissue. The aim of this study was to investigate MMP-2 activity in gastrocnemius, soleus, tibialis anterior (TA), and extensor digitorium longus (EDL) muscle after resistance training in ovariectomized rats. Wistar adult female rats were grouped into 7 groups (n = 10 per group): sedentary (Sed-Intact); ovariectomized sedentary (Sed-Ovx); pseudo-ovariectomized sedentary (Sed-Pseudo); acute exercise (AcuteEx-Intact); ovariectomized acute exercise (AcuteEx-Ovx); strength trained (ChronicEx-Intact); and ovariectomized strength trained (ChronicEx-Ovx). A 12-week resistance training period, during which the animals climbed a 1.1-m vertical ladder with weights secured to their tails, was used. The sessions were performed once every 3 days, with 4-9 climbs and 8-12 dynamic movements per climb. The MMP-2 activity was analyzed by zymography. There was higher MMP-2 activity in soleus muscle in the ChronicEx-Intact and ChronicEx-Ovx groups, and lower MMP-2 activity in the AcuteEx-Ovx group, compared with the Sed-Intact group (p < or =0.05). The Sed-Ovx and ChronicEx-Ovx groups presented lower MMP-2 activity than the Sed-Intact group in TA. There was higher MMP-2 activity in AcuteEx-Intact and the AcuteEx-Ovx compared with the Sed-Intact and Sed-Ovx in TA, respectively (p < or = 0.05). In TA and EDL, training increased MMP-2 activity in the Sed-Intact group. No statistically significant alterations were observed for gastrocnemius muscle. Strength training increases MMP-2 activity in soleus, TA, and EDL muscle, which may be important for muscle remodeling. Ovariectomy downregulates MMP-2 in TA and EDL, which may compromise muscle function.
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Affiliation(s)
- Jonato Prestes
- Department of Physiological Sciences, Federal University of Sao Carlos, Sao Carlos, Brazil.
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De Mello Malheiro OC, Giacomini CT, Justulin LA, Delella FK, Dal-Pai-Silva M, Felisbino SL. Calcaneal Tendon Regions Exhibit Different MMP-2 Activation After Vertical Jumping and Treadmill Running. Anat Rec (Hoboken) 2009; 292:1656-62. [DOI: 10.1002/ar.20953] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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