Preparation of anti-canine interleukin-31 receptor alpha polyclonal antibody and evaluation of its therapeutic efect in canine atopic dermatitis  

作　　者：Qiuhua Li Yanyan Qu Li Yao Ning Ma Mingxing Ding Yi Ding 

机构地区：[1]College of Veterinary Medicine,Huazhong Agricultural University,Wuhan,China

出　　处：《Animal Diseases》2024年第3期207-216,共10页动物疾病（英文）

基　　金：the National Natural Science Foundation of China(Grant No.32072938)。

摘　　要：Canine atopic dermatitis(CAD)is a prevalent genetically susceptible infammatory and pruritic allergic skin condition afecting not only the health of dogs but also the quality of life of their owners.Interleukin-31(IL-31)and interleukin-31 receptor alpha(IL-31RA)are essential for the development of pruritus in primates and mice.Hence,it is expected that inhibiting IL-31RA will be an efective approach to alleviate pruritus.The purpose of the study was to produce anti-canine IL-31RA polyclonal antibodies(anti-IL-31RA pAbs)and evaluate their efcacy in inhibiting house dust mite(HDM)-evoked pruritic responses.Dogs were immunized with antigens formed by IL-31RA recombinant short peptides coupled to BSA to produce anti-IL-31RA pAbs.The CAD model was developed by using HDM allergen stimulation,and the efects of IL-31RA pAbs on the reduction of pruritus in CAD model dogs were examined.The Canine Atopic Dermatitis Extent and Severity Index(CADESI)-4 and pruritus Visual Analog Scale(pVAS)were utilized to evaluate pruritic responses,and skin tissue samples were collected from the inguinal area for pathological assessment of skin infammatory cell infltration.The results showed that anti-IL-31RA pAbs with high titers(1:128,000)and specifcity were efectively produced.In the CAD model group,the severity of skin damage,pruritus score,infammatory cell infltration and level of infammatory factors were considerably elevated.Anti-IL-31RA pAbs relieved pruritic behavior and dermatitis in dogs compared to placebo-treated dogs.In conclusion,anti-IL-31RA pAbs efectively suppressed CAD in vivo and are anticipated to be an efective novel treatment for pruritic skin disorders such as CAD.

关 键 词：IL-31RA Atopic dermatitis Polyclonal antibody CANINE 

分 类 号：S85[农业科学—兽医学]