Acta Veterinaria et Zootechnica Sinica ›› 2022, Vol. 53 ›› Issue (6): 1925-1933.doi: 10.11843/j.issn.0366-6964.2022.06.026

• BASIC VETERINARY MEDICINE • Previous Articles     Next Articles

Distribution of Immune Cells in the Epididymis and Vas Deferens of Yaks (Bos grunniens)

ZHANG Qian, CUI Yan*, YU Sijiu, HE Junfeng, PAN Yangyang, WANG Meng   

  1. College of Veterinary Medicine, Gansu Agricultural University, Lanzhou 730000, China
  • Received:2021-09-30 Online:2022-06-23 Published:2022-06-25

Abstract: This paper aimed to study the distribution characteristics of immune cells in the epididymis and vas deferens of healthy yaks. The location of CD68+ macrophages, CD3+ T lymphocytes, CD79α+ B lymphocytes, IgA+ and IgG+ plasmocytes, and the expression of surface markers of immune cells in the epididymis (head, body and tail) and vas deferens of juvenile (5-6 months old) and adult (3-4 years old) yaks were detected by immunohistochemistry and real-time fluorescence quantitative (qRT-PCR). The results showed that CD68+ macrophages, CD3+ T lymphocytes, CD79α+ B lymphocytes, IgA+ and IgG+ plasmocytes were mainly distributed in the epithelium and interstitium of the epididymis and vas deferens. Additionally the CD68 and CD3 mRNA and protein level in the caput and corpus of yaks were significantly higher than that of the cauda and vas deferens (P < 0.05), while in the cauda and vas deferens CD79α, IgA and IgG mRNA and protein level were significantly higher than those of the caput and corpus epididymis (P < 0.05). Moreover the CD68, CD3, CD79α, IgA and IgG mRNA and protein level in the epididymis and vas deferens of the adult yaks were significantly higher than those of the juvenile yaks (P < 0.05). The above results suggest that the caput may be the main site of cellular immunity, while the caudal epididymis and vas deferens are the main area of humoral immune response. Moreover the local immunity of the epididymis and vas deferens of the yak may mature and expand to a fully functional state in adult yaks. The above data would provide morphological data for further research on local reproductive immunoregulation and pathology in plateau yaks.

Key words: yak, epididymis, vas deferens, immune cells

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