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Animals : an open access journal from MDPI2021; 11(11); 3247; doi: 10.3390/ani11113247

Role of Innate Immunity in Initiation and Progression of Osteoarthritis, with Emphasis on Horses.

Abstract: Osteoarthritis (OA) is a common condition with diverse etiologies, affecting horses, humans, and companion animals. Importantly, OA is not a single disease, but rather a disease process initiated by different events, including acute trauma, irregular or repetitive overload of articular structures, and spontaneous development with aging. Our understanding of the pathogenesis of OA is still evolving, and OA is increasingly considered a multifactorial disease in which the innate immune system plays a key role in regulating and perpetuating low-grade inflammation, resulting in sustained cartilage injury and destruction. Macrophages within the synovium and synovial fluid are considered the key regulators of immune processes in OA and are capable of both stimulating and suppressing joint inflammation, by responding to local and systemic cues. The purpose of this review is to examine the role of the innate immune system in the overall pathogenesis of OA, drawing on insights from studies in humans, animal models of OA, and from clinical and research studies in horses. This review also discusses the various therapeutic immune modulatory options currently available for managing OA and their mechanisms of action.
Publication Date: 2021-11-13 PubMed ID: 34827979PubMed Central: PMC8614551DOI: 10.3390/ani11113247Google Scholar: Lookup
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  • Journal Article
  • Review

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

The research article focuses on the role of the innate immune system in the onset and progression of osteoarthritis in horses, with additional insights derived from human and animal model studies.

Understanding Osteoarthritis

  • Osteoarthritis (OA) is a prevalent condition affecting various species, including horses, humans, and other animals. It is not distinct as an illness but rather characterized as a disease process triggered by a range of events. These triggers could include acute trauma, irregular or repetitive overload of joint structures, or aging-related spontaneous development.

Osteoarthritis’ Pathogenesis

  • The study highlights that the understanding of OA’s pathogenesis is continually evolving. It is increasingly viewed as a multifactorial condition in which the innate immune system assumes a crucial role. This system helps regulate and maintain low-grade inflammation, consequently causing persistent cartilage damage and disintegration.

Role of Innate Immunity in Osteoarthritis

  • The central role of the innate immune system in OA’s overall pathogenesis is critically examined in the paper. Macrophages, specific types of immune cells, that exist in the synovial fluid and synovium are identified as key regulators of immune processes in OA.
  • In responding to local and systemic cues, these macrophages can both trigger and subdue joint inflammation, thereby influencing the progression and severity of OA.
  • This comprehensive view on the influence of the immune system on OA is derived from a diverse set of perspectives encompassing humans studies, animal model studies, and other clinical and research investigations conducted on horses.

Therapeutic Management of Osteoarthritis

  • The paper also discusses the diverse immune modulatory therapeutic options currently available for managing OA. These treatment pathways can influence the immune factors that contribute to the disease, thereby potentially slowing its progression or reducing its symptoms.
  • Each therapeutic option’s mechanism of action is discussed laying the groundwork for selecting the most suitable treatment approach for different OA cases.

Cite This Article

APA
Estrada McDermott J, Pezzanite L, Goodrich L, Santangelo K, Chow L, Dow S, Wheat W. (2021). Role of Innate Immunity in Initiation and Progression of Osteoarthritis, with Emphasis on Horses. Animals (Basel), 11(11), 3247. https://doi.org/10.3390/ani11113247

Publication

ISSN: 2076-2615
NlmUniqueID: 101635614
Country: Switzerland
Language: English
Volume: 11
Issue: 11
PII: 3247

Researcher Affiliations

Estrada McDermott, Juan
  • Department of Clinical Sciences, Colorado State University, Fort Collins, CO 80523, USA.
Pezzanite, Lynn
  • Department of Clinical Sciences, Colorado State University, Fort Collins, CO 80523, USA.
Goodrich, Laurie
  • Department of Clinical Sciences, Colorado State University, Fort Collins, CO 80523, USA.
Santangelo, Kelly
  • Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523, USA.
Chow, Lyndah
  • Department of Clinical Sciences, Colorado State University, Fort Collins, CO 80523, USA.
Dow, Steven
  • Department of Clinical Sciences, Colorado State University, Fort Collins, CO 80523, USA.
  • Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523, USA.
Wheat, William
  • Department of Clinical Sciences, Colorado State University, Fort Collins, CO 80523, USA.
  • Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523, USA.

Grant Funding

  • N/A / Fulbright Scholar Program
  • NCATS CTSA 5TL1TR002533-02 / NIH HHS
  • 5T32 OD010437 / NIH HHS
  • N/A / Carolyn Quan and Porter Bennett

Conflict of Interest Statement

The co-authors declare commercial affiliations with Validus Cellular Therapeutics (S.D. co-founder) and Advanced Regenerative Therapies (L.G. shareholder).

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