Preliminary association analysis of TLR9 gene polymorphisms and immune parameters in an Italian Holstein calves population

BMC Proceedings

Proceedings

Elisabetta Catalani¹  Alessandro Nardone¹  Nicola Lacetera¹  Gian Luca Autorino²  Antonino Barone²  Maria Teresa Scicluna²  Andrea Caprioli² 

[1] Dipartimento di Produzioni Animali, Università degli Studi della Tuscia, 01100, Viterbo, Italy;Istituto Zooprofilattico Sperimentale Lazio e Toscana, 00178, Roma, Italy;

关键词: Peripheral Blood Mononuclear Cell;    Proliferative Response;    Immunological Parameter;    Automate Cell Counter;    Trypan Blue Exclusion Method;   

DOI  :  10.1186/1753-6561-5-S4-S20

来源: Springer

【 摘 要 】

BackgroundThis preliminary study was aimed at evaluating the association between single nucleotide polymorphisms (SNPs) on Toll like receptor 9 (TLR9) gene and some immunological parameters in a population of Italian Holstein calves.MethodsThe study was carried out in a commercial farm on 68 Holstein calves aging about 6 months. Genomic DNA was extracted from peripheral blood mononuclear cells (PBMC) and genotyped for nine SNPs on TLR9. Immunological parameters considered were the immunoglobulin (Ig) G titers against bovine herpesvirus 1, and the proliferative response of peripheral blood mononuclear cells to mitogens. For the association study, only results relative to the SNP located in the promoter region have been discussed.ResultsAmong the nine SNPs expected, only eight were detected. Considering the SNP located in the promoter region, all three possible genotypes were observed, and their distribution was as follows: genotype a (n=34), b (n=19), and c (n=8). On the basis of their response to vaccine, calves were categorized as low (L, n=8), medium (M, n=45) and high responders (H, n=8). Although no significant association was found between genotypes and L, M or H categories, the genotype estimated as the less represented within the population (c) had no calves categorized as H, the highest frequency of L (25%), and mean values of IgG lower (P < 0.005) compared to genotype b. Furthermore, IgG titers were positively correlated with responses of PBMC to mitogens.ConclusionsGenotype c appeared to be “non advantageous” in terms of immune response. It was characterized by the presence of the mutation in homozygosity and, not surprisingly, it was the most rare genotype in the population. Larger studies are necessary in order to confirm these observations.

【 授权许可】

Unknown   
© Catalani et al; licensee BioMed Central Ltd. 2011. This article is published under license to BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.