A narrative review on MicroRNA’s role in diagnosis and therapy of equine endometritis.

Overview

• This review article explores how microRNAs (miRNAs) influence the diagnosis and treatment of endometritis in mares, a major cause of infertility.
• It discusses the biological role of specific miRNAs in controlling inflammation and highlights potential new genetic and pharmaceutical approaches to manage this condition.

Background: Equine Endometritis and Its Impact

• Endometritis is an inflammation of the endometrium (lining of the uterus) in mares, commonly resulting in infertility.
• Infection by certain bacteria leads to disruption of the endometrium’s innate immune response.
• This disruption causes a prolonged systemic inflammatory response, either through circulating inflammatory mediators in the blood or cellular degeneration.
• Bacterial endotoxins contribute to this sustained inflammation, perpetuating the disease process.

Role of MicroRNAs (miRNAs)

• MicroRNAs are small, non-coding RNA molecules involved in regulating gene expression post-transcriptionally.
• They typically function by blocking the transcription or translation of target mRNAs, effectively controlling protein production.
• MiRNAs regulate many biological processes, including immune responses and inflammation.

Specific miRNAs in Equine Endometritis

• The review focuses on several key equine miRNAs linked to endometritis: eca-miR-17, eca-miR-223, eca-miR-200a, eca-miR-155, and eca-miR-205.
• These miRNAs modulate the expression of genes involved in inflammatory pathways and cytokine signaling.
• By influencing cytokine production and immune responses, these miRNAs contribute to the development or suppression of endometrial inflammation.

Therapeutic Implications of miRNAs

• Given their regulatory role, miRNAs hold promise as therapeutic targets to control or reduce inflammation in endometritis.
• Manipulating miRNA activity could offer novel treatments that modulate immune function more precisely than traditional drugs.
• Early detection of altered miRNA levels might serve as diagnostic biomarkers for timely intervention.

Future Directions and Research Needs

• The article emphasizes the need for advanced genetic tools to further understand miRNA gene regulation in equine endometritis.
• Development of new pharmaceutical agents based on miRNA modulation is suggested to improve therapy outcomes.
• Research into miRNAs could enhance early diagnosis, prevention strategies, and effective management of endometritis in mares.
• Such advancements may ultimately reduce infertility caused by this disease.