Effect of stress on interleukin-2 receptor expression by bovine mononuclear leukocytes

被引：19

作者：

Lan, HC ^{[1
]}

Reddy, PG ^{[1
]}

Chambers, MA ^{[1
]}

Walker, G ^{[1
]}

Srivastava, KK ^{[1
]}

Ferguson, JA ^{[1
]}

机构：

[1] TUSKEGEE UNIV,DEPT PATHOL & MICROBIOL,TUSKEGEE,AL 36088

来源：

VETERINARY IMMUNOLOGY AND IMMUNOPATHOLOGY | 1995年 / 49卷 / 03期

关键词：

stress; cattle; interleukin-2; receptor; interleukin-12;

D O I：

10.1016/0165-2427(95)05470-7

中图分类号：

R392 [医学免疫学]; Q939.91 [免疫学];

学科分类号：

100102 ;

摘要：

Holstein calves given three consecutive i.m. injections of dexamethasone (DEX) (0.04 mg kg(-1)) showed lymphopenia and neutrophilia with increased numbers of mature neutrophils on post-injection Days 1 and 2, but these values returned to normal levels by post-injection Day 3. Interleukin-2 receptor (IL-2R) expression by peripheral blood mononuclear cells (PBMC) was evaluated by flow cytometry using a monoclonal antibody specific for bovine IL-2R alpha. Treatment with DEX significantly decreased expression of IL-2R alpha in Concanavalin A (Con A)-activated PBMC on Day 1 (P < 0.02) and on Day 2 (P < 0.1). On Day 3, expression of IL-2R alpha by PBMC was similar in control and DEX-treated calves. This decrease in IL-2R alpha expression correlated with decreased proliferative responses of PBMC to the T-cell mitogens, phytohemagglutinin (PHA) and Con A. Following in vitro treatment with recombinant human (rhu) interleukin-12 (IL-12) Con A-induced proliferative responses of PBMC tended to be higher in both groups. However, the rhu IL-12 induced increase of Con A activated proliferative responses were significantly greater in DEX-treated calves than in control calves. IL-2R alpha expression by PBMC was found to be less in calves transported 800 km in a truck as compared to that in PBMC from controls. These data suggest that stress-induced immunosuppression in calves may involve decreased IL-2R alpha expression and decreased IL-12 production. Serum chemistry results indicated a trend toward higher creatine kinase (CK) levels in DEX-treated calves. This may be due to the lysis of corticosteroid sensitive lymphocytes.

引用

页码：241 / 249

页数：9

共 20 条

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