Porcine lactoferrin administration enhances peripheral lymphocyte proliferation and assists infectious bursal disease vaccination in native chickens.
The purpose of this study was to investigate the effects of dietary supplementation with recombinant porcine lactoferrin (rPLF) produced by yeast culture on peripheral lymphocyte proliferation and serum antibody titers in chickens vaccinated against the infectious bursal disease (IBD) virus. Treatment groups were fed with rPLF powder in their diet (2.0%, w/w), and the IBD vaccine was administrated at 1 and 3 weeks of age. At 8, 12, and 16 weeks after vaccination, serum IBD antibody titers were measured via the micro-method and T cell proliferation rates were evaluated. In gene expression analyses, rPLF-treated chicken peripheral T lymphocytes were stimulated with concanavalin A (ConA) for 24h. The mRNA expression levels of interleukin-2 (IL-2), interferon-gamma (IFN-gamma), interleukin-4 (IL-4), and interleukin-12 (IL-12) were determined using a semi-quantitative RT-PCR assay. The results revealed that the rPLF additive led to significant increases in serum IgG and IBD-specific antibody titers (P<0.05). The rPLF administration significantly increased chicken intestinal villous lengths and also enhanced the expression of IFN-gamma and IL-12 in chicken T lymphocytes. These data suggest that rPLF enhances cell-mediated immunity and augment the ability of IBD vaccination to benefit chicken industry in disease resistance.
Hung
Che-Ming
CM
Department of Life Sciences, National Chung Hsing University, No. 250, Kuo Kuang Road, Taichung 402, Taiwan.
Yeh
Chia-Chou
CC
Chen
Hsiao-Ling
HL
Lai
Cheng-Wei
CW
Kuo
Meng-Fu
MF
Yeh
Ming-Hsien
MH
Lin
Willie
W
Tu
Ming-Yu
MY
Cheng
Hsu-Chen
HC
Chen
Chuan-Mu
CM
D000276:Adjuvants, Immunologic / Q000008:administration & dosage*; D000284:Administration, Oral; D000818:Animals; D018175:Birnaviridae Infections / Q000276:immunology / Q000517:prevention & control / Q000662:veterinary*; D049109:Cell Proliferation; D002478:Cells, Cultured; D002645:Chickens; D016207:Cytokines / Q000096:biosynthesis; D020869:Gene Expression Profiling; D007243:Infectious bursal disease virus / Q000276:immunology*; D007781:Lactoferrin / Q000008:administration & dosage*; D008214:Lymphocytes / Q000276:immunology*; D011201:Poultry Diseases / Q000276:immunology / Q000517:prevention & control*; D011994:Recombinant Proteins / Q000008:administration & dosage; D014611:Vaccination / Q000379:methods; D014765:Viral Vaccines / Q000276:immunology*
D000276:Adjuvants, Immunologic; D016207:Cytokines; D011994:Recombinant Proteins; D014765:Viral Vaccines; D007781:Lactoferrin