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Colbath A, Haubruck P. Closing the gap: sex-related differences in osteoarthritis and the ongoing need for translational studies. ANNALS OF TRANSLATIONAL MEDICINE 2023; 11:339. [PMID: 37675305 PMCID: PMC10477647 DOI: 10.21037/atm-23-1546] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 05/30/2023] [Indexed: 09/08/2023]
Affiliation(s)
- Aimee Colbath
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Patrick Haubruck
- Raymond Purves Bone and Joint Research Laboratory, Kolling Institute, Institute of Bone and Joint Research, Faculty of Medicine and Health University of Sydney, Royal North Shore Hospital, St. Leonards, New South Wales, Australia
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Black AL, Clark AL. Sexual dimorphism in knee osteoarthritis: Biomechanical variances and biological influences. J Orthop 2022; 32:104-108. [DOI: 10.1016/j.jor.2022.05.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 05/25/2022] [Indexed: 11/27/2022] Open
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Yang DS, Dickerson EE, Zhang LX, Richendrfer H, Karamchedu PN, Badger GJ, Schmidt TA, Fredericks AM, Elsaid KA, Jay GD. Quadruped Gait and Regulation of Apoptotic Factors in Tibiofemoral Joints following Intra-Articular rhPRG4 Injection in Prg4 Null Mice. Int J Mol Sci 2022; 23:ijms23084245. [PMID: 35457064 PMCID: PMC9025840 DOI: 10.3390/ijms23084245] [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] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 04/06/2022] [Indexed: 12/03/2022] Open
Abstract
Camptodactyly-arthropathy-coxa vara-pericarditis (CACP) syndrome leads to diarthrodial joint arthropathy and is caused by the absence of lubricin (proteoglycan 4—PRG4), a surface-active mucinous glycoprotein responsible for lubricating articular cartilage. In this study, mice lacking the orthologous gene Prg4 served as a model that recapitulates the destructive arthrosis that involves biofouling of cartilage by serum proteins in lieu of Prg4. This study hypothesized that Prg4-deficient mice would demonstrate a quadruped gait change and decreased markers of mitochondrial dyscrasia, following intra-articular injection of both hindlimbs with recombinant human PRG4 (rhPRG4). Prg4−/− (N = 44) mice of both sexes were injected with rhPRG4 and gait alterations were studied at post-injection day 3 and 6, before joints were harvested for immunohistochemistry for caspase-3 activation. Increased stance and propulsion was shown at 3 days post-injection in male mice. There were significantly fewer caspase-3-positive chondrocytes in tibiofemoral cartilage from rhPRG4-injected mice. The mitochondrial gene Mt-tn, and myosin heavy (Myh7) and light chains (Myl2 and Myl3), known to play a cytoskeletal stabilizing role, were significantly upregulated in both sexes (RNA-Seq) following IA rhPRG4. Chondrocyte mitochondrial dyscrasias attributable to the arthrosis in CACP may be mitigated by IA rhPRG4. In a supporting in vitro crystal microbalance experiment, molecular fouling by albumin did not block the surface activity of rhPRG4.
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Affiliation(s)
- Daniel S. Yang
- School of Engineering, Brown University, Providence, RI 02912, USA; (D.S.Y.); (G.D.J.)
- Department of Emergency Medicine, Alpert School of Medicine, Brown University, Providence, RI 02903, USA; (L.X.Z.); (H.R.)
| | - Edward E. Dickerson
- North Carolina Agricultural Technical State University, Greensboro, NC 27411, USA;
| | - Ling X. Zhang
- Department of Emergency Medicine, Alpert School of Medicine, Brown University, Providence, RI 02903, USA; (L.X.Z.); (H.R.)
| | - Holly Richendrfer
- Department of Emergency Medicine, Alpert School of Medicine, Brown University, Providence, RI 02903, USA; (L.X.Z.); (H.R.)
| | - Padmini N. Karamchedu
- Department of Orthopedics, Alpert School of Medicine, Brown University, Providence, RI 02903, USA;
| | - Gary J. Badger
- Department of Medical Biostatistics, Larner College of Medicine, University of Vermont, Burlington, VT 05405, USA;
| | - Tannin A. Schmidt
- Department of Biomedical Engineering, School of Dental Medicine, University of Connecticut Health, Farmington, CT 06030, USA;
| | - Alger M. Fredericks
- Department of Surgery, Alpert School of Medicine, Brown University, Providence, RI 02903, USA;
| | - Khaled A. Elsaid
- School of Pharmacy, Chapman University, Irvine, CA 92618, USA
- Correspondence:
| | - Gregory D. Jay
- School of Engineering, Brown University, Providence, RI 02912, USA; (D.S.Y.); (G.D.J.)
- Department of Emergency Medicine, Alpert School of Medicine, Brown University, Providence, RI 02903, USA; (L.X.Z.); (H.R.)
- Department of Orthopedics, Alpert School of Medicine, Brown University, Providence, RI 02903, USA;
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Townsend K, Imbert I, Eaton V, Stevenson GW, King T. Voluntary exercise blocks ongoing pain and diminishes bone remodeling while sparing protective mechanical pain in a rat model of advanced osteoarthritis pain. Pain 2022; 163:e476-e487. [PMID: 34224496 PMCID: PMC8712625 DOI: 10.1097/j.pain.0000000000002392] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 06/18/2021] [Indexed: 11/26/2022]
Abstract
ABSTRACT Exercise is the most common treatment recommended by healthcare providers for the treatment of musculoskeletal pain. We examined whether voluntary running wheel exercise improves pain and bone remodeling in rats with monosodium iodoacetate-induced unilateral knee joint pain. During acquisition of wheel running before osteoarthritis (OA) treatment, rats separated into 2 groups characterized by either high or low levels of voluntary wheel running as indicated by distance and peak speed. After the induction of knee joint OA, all rats showed diminished voluntary wheel running throughout the study. Voluntary wheel running failed to alter evoked nociceptive responses evaluated as weight asymmetry or hind paw tactile thresholds at any timepoint of the study. By contrast, relief of ongoing pain was demonstrated by conditioned place preference produced by lidocaine injection into the monosodium iodoacetate-treated knee in high but not low-running rats. Both high and low voluntary runners showed diminished trabecular bone loss compared with sedentary controls. These observations indicate that both high-intensity and low-intensity exercise is beneficial in protecting against bone remodeling in advanced OA. The data suggest that similar to clinical observation, bone remodeling does not correlate with pain. In addition, these results suggest that higher intensity exercise may relieve persistent ongoing OA pain while maintaining movement-evoked nociception. The relief of ongoing pain can potentially offer significant improvement in quality of life, whereas preservation of responses to movement-evoked pain may be especially important in protecting the joint from damage because of overuse.
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Affiliation(s)
- Kaylee Townsend
- Department of Biomedical Sciences, Center for Excellence in the Neurosciences, College of Osteopathic Medicine, University of New England, Biddeford, ME, United States
- Department of Psychology, College of Arts and Sciences, University of New England, Biddeford, ME, United States
| | - Ian Imbert
- Department of Biomedical Sciences, Center for Excellence in the Neurosciences, College of Osteopathic Medicine, University of New England, Biddeford, ME, United States
- Department of Psychology, College of Arts and Sciences, University of New England, Biddeford, ME, United States
| | - Victoria Eaton
- Department of Biomedical Sciences, Center for Excellence in the Neurosciences, College of Osteopathic Medicine, University of New England, Biddeford, ME, United States
- Department of Psychology, College of Arts and Sciences, University of New England, Biddeford, ME, United States
| | - Glenn W Stevenson
- Department of Biomedical Sciences, Center for Excellence in the Neurosciences, College of Osteopathic Medicine, University of New England, Biddeford, ME, United States
- Department of Psychology, College of Arts and Sciences, University of New England, Biddeford, ME, United States
| | - Tamara King
- Department of Biomedical Sciences, Center for Excellence in the Neurosciences, College of Osteopathic Medicine, University of New England, Biddeford, ME, United States
- Department of Psychology, College of Arts and Sciences, University of New England, Biddeford, ME, United States
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Neuroimmune interactions and osteoarthritis pain: focus on macrophages. Pain Rep 2021; 6:e892. [PMID: 33981927 PMCID: PMC8108586 DOI: 10.1097/pr9.0000000000000892] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 12/01/2020] [Accepted: 12/06/2020] [Indexed: 12/14/2022] Open
Abstract
Bidirectional interactions between the immune system and the nervous system are increasingly appreciated as playing a pathogenic role in chronic pain. Unraveling the mechanisms by which inflammatory pain is mediated through communication between nerves and immune cells may lead to exciting new strategies for therapeutic intervention. In this narrative review, we focus on the role of macrophages in the pathogenesis of osteoarthritis (OA) pain. From regulating homeostasis to conducting phagocytosis, and from inducing inflammation to resolving it, macrophages are plastic cells that are highly adaptable to their environment. They rely on communicating with the environment through cytokines, growth factors, neuropeptides, and other signals to respond to inflammation or injury. The contribution of macrophages to OA joint damage has garnered much attention in recent years. Here, we discuss how macrophages may participate in the initiation and maintenance of pain in OA. We aim to summarize what is currently known about macrophages in OA pain and identify important gaps in the field to fuel future investigations.
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Laitner MH, Erickson LC, Ortman E. Understanding the Impact of Sex and Gender in Osteoarthritis: Assessing Research Gaps and Unmet Needs. J Womens Health (Larchmt) 2020; 30:634-641. [PMID: 33325792 DOI: 10.1089/jwh.2020.8828] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Osteoarthritis (OA) affects more than 300 million individuals globally, with higher prevalence in women than in men. In addition, OA affects women and men differently, with women demonstrating both increased disease severity and disability. The Society for Women's Health Research (SWHR) convened an interdisciplinary group of expert researchers and clinicians for a roundtable meeting to review the current state of the science on OA and to identify knowledge gaps in the scientific literature, especially as they relate to the topics of sex and gender. The current review summarizes discussions from the roundtable and prioritizes areas of need that warrant further attention in OA research, diagnosis, care, and education. Improvements in basic and clinical research, clinical practice, patient education, and policy are needed to allow for better understanding as to the pathogenesis of sex- and gender-related disparities in OA.
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Affiliation(s)
- Melissa H Laitner
- The Society for Women's Health Research, Washington, District of Columbia, USA
| | | | - Emily Ortman
- The Society for Women's Health Research, Washington, District of Columbia, USA
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