期刊
EQUINE VETERINARY EDUCATION
卷 35, 期 3, 页码 152-162出版社
WILEY
DOI: 10.1111/eve.13661
关键词
horse; melanocortin; genetics; opioid; sensitivity
Individual variation in opioid sensitivity can significantly impact equine veterinary treatments. This review explores the overlap between opioid metabolism and coat color mechanisms in horses, focusing on the MC1R gene. The use of MC1R coat color genotype may improve opioid use in clinical settings, but the relationship between opioid metabolism and MC1R variants in horses remains unexplored.
Individual variation in opioid sensitivity can have a profound impact on the safety and efficacy of equine veterinary treatments, with the ability to adequately manage equine pain in a clinical setting currently limited. This review aims to explore the overlap between biological mechanisms associated with opioid metabolism and those mechanisms associated with coat colour in horses as has been documented in humans, with particular focus on the melanocortin-1 receptor (MC1R) gene. In the future, the use of the MC1R coat colour genotype could help to indicate variable opioid sensitivities thereby greatly improving the use of opioids in clinical settings. The MC1R gene has a well-established role in melanogenesis and pigment switching, but involvement in the pain-modulating periaqueductal grey (PAG) descending pathway and in immune responses, both of which contain opioid receptors, has also been suggested in humans. However, this relationship between opioid metabolism and the connection to the three known MC1R variants (E-E, E-e and E-ea) in horses is yet to be explored.
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