Profiles of expression pattern and tissue distribution of host defense peptides genes in different chicken ( Gallus gallus ) breeds related to body weight

Zhengtian Li, Irfan Ahmed, Zhiqiang Xu, Shuai Sun, Tao Li, Dahai Gu, Yong Liu, Xia Zhang, Shixiong Yan, Wenyuan Hu, Ziqing Jiang, Xiaohua Duan, Qihua Li, Lixian Liu, Hua Rong, Kun Wang, Alsoufi Mohammed Abdulwahid, Tengfei Dou, Shanrong Wang, Zhengchang SuChangrong Ge, Marinus F.W. Te Pas*, Junjing Jia, Ying Huang

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Host defense peptides (HDPs) are an important first line of defense with antimicrobial and immunomodulatory properties. Selection for increased body weight is hypothesized to be related to reduced immune response. We studied the relationships among body weight, age, and the HDP expression patterns in intestine and immune organs. We used chickens with marked differences of body sizes. The non-selected Daweishan mini chickens showed the highest indexes of immune organs and the lowest concentrations of the plasma immune parameters C3, C4, IgA, and IgY, while the commercial Avian broiler showed the opposite results. The Daweishan mini chickens showed the highest mRNA expressions of HDP genes in small intestine followed by the semi-selected Wuding chickens. Compared with local breeds, broiler chickens showed higher mRNA expression of HDP genes in spleen, thymus, and bursa. Body weight and HDP expression levels were negatively correlated in the intestine and positively in the immune organs. Our results indicated that the HDP immune regulatory roles in small intestine acted as first line of defense in innate immunity in local breeds, and as an adaptive immunity in broiler chickens. Selection was associated with different expression expressions of HDP genes in breed-, age-, and organ-specific manners.

Original languageEnglish
Article numbere0238675
JournalPLoS ONE
Volume15
DOIs
Publication statusPublished - Dec 2020

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