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Journal of Zhejiang University SCIENCE B

ISSN 1673-1581(Print), 1862-1783(Online), Monthly

A corn straw-based diet increases release of inflammatory cytokines in peripheral blood mononuclear cells of dairy cows

Abstract: Recent studies have shown that diet can affect the body’s immunity. Roughage of dairy cows consists of a variety of plant materials which make different contributions to health. This study investigated the effect of different roughages on the immunity of dairy cows. Serum, peripheral blood mononuclear cells (PBMCs), and milk samples were collected from 20 multiparous mid-lactation cows fed mixed forage (MF)- or corn straw (CS)-based diets. Expression profile analysis was used to detect the differentially expressed genes (DEGs) from PBMCs. The results showed that milk protein in the MF group increased to 3.22 g/100 ml, while that of the CS group milk was 2.96 g/100 ml; by RNA sequencing, it was found that 1615 genes were differentially expressed between the CS group and the MF group among the 24 027 analyzed probes. Gene ontology (GO) and pathway analysis of DEGs suggested that these genes (especially genes coding cytokines, chemokine and its receptors) are involved in the immune response. Results were confirmed at the protein level via detecting the levels of interleukin-2 (IL-2), IL-6, IL-10, IL-12, leptin (LEP), interferon-γ (IFN-γ), transforming growth factor-β1 (TGF-β1), and tumor necrosis factor-α (TNF-α) in peripheral blood by enzyme-linked immunosorbent assay (ELISA) and radioimmunoassay analysis. Our data supported the conclusions that the protein content in milk of the MF group was higher than that of the CS group, the CS-based diets induced more release of cytokines than the MF-based diets in dairy cows’ PBMCs, and milk protein content may be affected by cytokines.

Key words: Roughage; Immunity; Inflammatory cytokine; Expression profile analysis

Chinese Summary  <20> 饲喂玉米秸秆粗饲料可加剧奶牛外周血单核细胞释放炎性细胞因子

关键词组:粗饲料;免疫;炎性细胞因子;表达谱分析


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DOI:

10.1631/jzus.B1700571

CLC number:

S852.4+2

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On-line Access:

2018-09-30

Received:

2017-11-16

Revision Accepted:

2018-02-15

Crosschecked:

2018-09-10

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