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Kravitz A, Liao M, Morota G, Tyler R, Cockrum R, Manohar BM, Ronald BSM, Collins MT, Sriranganathan N. Retrospective Single Nucleotide Polymorphism Analysis of Host Resistance and Susceptibility to Ovine Johne's Disease Using Restored FFPE DNA. Int J Mol Sci 2024; 25:7748. [PMID: 39062990 PMCID: PMC11276633 DOI: 10.3390/ijms25147748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Revised: 06/26/2024] [Accepted: 06/28/2024] [Indexed: 07/28/2024] Open
Abstract
Johne's disease (JD), also known as paratuberculosis, is a chronic, untreatable gastroenteritis of ruminants caused by Mycobacterium avium subsp. paratuberculosis (MAP) infection. Evidence for host genetic resistance to disease progression exists, although it is limited due to the extended incubation period (years) and diagnostic challenges. To overcome this, previously restored formalin-fixed paraffin embedded tissue (FFPE) DNA from archived FFPE tissue cassettes was utilized for a novel retrospective case-control genome-wide association study (GWAS) on ovine JD. Samples from known MAP-infected flocks with ante- and postmortem diagnostic data were used. Cases (N = 9) had evidence of tissue infection, compared to controls (N = 25) without evidence of tissue infection despite positive antemortem diagnostics. A genome-wide efficient mixed model analysis (GEMMA) to conduct a GWAS using restored FFPE DNA SNP results from the Illumina Ovine SNP50 Bead Chip, identified 10 SNPs reaching genome-wide significance of p < 1 × 10-6 on chromosomes 1, 3, 4, 24, and 26. Pathway analysis using PANTHER and the Kyoto Encyclopedia of Genes and Genomes (KEGG) was completed on 45 genes found within 1 Mb of significant SNPs. Our work provides a framework for the novel use of archived FFPE tissues for animal genetic studies in complex diseases and further evidence for a genetic association in JD.
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Affiliation(s)
- Amanda Kravitz
- Center for One Health Research, Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| | - Mingsi Liao
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| | - Gota Morota
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| | - Ron Tyler
- Center for One Health Research, Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| | - Rebecca Cockrum
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| | - B. Murali Manohar
- Department of Veterinary Pathology, Tamilnadu Veterinary and Animal Sciences University, Madhavaram Milk Colony, Chennai 600051, Tamil Nadu India, India
| | - B. Samuel Masilamoni Ronald
- Department of Veterinary Pathology, Tamilnadu Veterinary and Animal Sciences University, Madhavaram Milk Colony, Chennai 600051, Tamil Nadu India, India
| | - Michael T. Collins
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Nammalwar Sriranganathan
- Center for One Health Research, Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
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Di Marco Lo Presti V, Ippolito D, Migliore S, Tolone M, Mignacca SA, Marino AMF, Amato B, Calogero R, Vitale M, Vicari D, Ciarello FP, Fiasconaro M. Large-scale serological survey on Mycobacterium avium subsp. paratuberculosis infection in sheep and goat herds in Sicily, Southern Italy. Front Vet Sci 2024; 11:1334036. [PMID: 38362298 PMCID: PMC10868524 DOI: 10.3389/fvets.2024.1334036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 01/11/2024] [Indexed: 02/17/2024] Open
Abstract
Introduction Paratuberculosis (PTB) is a worldwide chronic, contagious enteric disease caused by Mycobacterium avium subsp. paratuberculosis (MAP) mainly affecting ruminant species. PTB is a WOAH-listed disease with direct and indirect economic losses in the livestock sector, negative impact on animal welfare and significant public health concerns. In spite of this, MAP prevalence in small ruminants is still unknown and the prevalence appears to be underestimated in many countries. The aim of this study is providing a first large-scale serological survey on MAP infection in small ruminants in Sicily, a region of Southern Italy with the 11.3 and 8.9% Italian national heritage of sheep and goats, respectively. Methods For this purpose, we analyzed a total of 48,643 animals reared in 439 flocks throughout Sicily. MAP seroprevalence was estimated both at herd-level and animal-level within breeds reared in all the nine sampled provinces. Results Our results revealed a high overall apparent prevalence at herd-level of 71.8% in sheep and 60.8% in goat farms with an animal-level prevalence of 4.5 and 5.1% in sheep and goats, respectively. Significant statistical differences were found between the provinces and within the breeds both in sheep and goats. Discussion Our study provides the first large-scale serological survey on PTB infection in small ruminants in Sicily and showed a high prevalence of disease depending to the species, breed and province. This study represents the first step to better understand the MAP epidemiology in a typical Mediterranean breeding context, suggesting the need of in-depth study on the herds risk factors, including the eventual presence of candidate genes for resistance/susceptibility to PTB in native breeds.
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Affiliation(s)
| | - Dorotea Ippolito
- Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, Palermo, Italy
- Unit of Emerging Zoonoses, Department of Food Safety, Nutrition and Veterinary Public Health, Istituto Superiore di Sanità, Rome, Italy
| | - Sergio Migliore
- Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, Palermo, Italy
| | - Marco Tolone
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, Messina, Italy
| | | | | | - Benedetta Amato
- Department of Veterinary Pathology, Bristol Veterinary School, University of Bristol, Bristol, United Kingdom
| | - Rosita Calogero
- Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, Palermo, Italy
| | - Maria Vitale
- Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, Palermo, Italy
| | - Domenico Vicari
- Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, Palermo, Italy
| | | | - Michele Fiasconaro
- Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, Palermo, Italy
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Usai MG, Casu S, Sechi T, Salaris SL, Miari S, Mulas G, Cancedda MG, Ligios C, Carta A. Advances in understanding the genetic architecture of antibody response to paratuberculosis in sheep by heritability estimate and LDLA mapping analyses and investigation of candidate regions using sequence-based data. Genet Sel Evol 2024; 56:5. [PMID: 38200416 PMCID: PMC10777618 DOI: 10.1186/s12711-023-00873-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 12/20/2023] [Indexed: 01/12/2024] Open
Abstract
BACKGROUND Paratuberculosis is a contagious and incurable disease that is caused by Mycobacterium avium subsp. paratuberculosis (MAP) with significant negative effects on animal welfare and farm profitability. Based on a large naturally infected flock over 12 years, we analyzed repeated enzyme-linked immunosorbent assay tests (ELISA), OvineSNP50 BeadChip genotypes and whole-genome sequences imputed from 56 influential animals. The main goals were to estimate the genetic parameters of proxy traits for resistance to MAP, identify genomic regions associated with the host's immune response against MAP and search for candidate genes and causative mutations through association and functional annotation analyses of polymorphisms identified by sequencing. RESULTS Two variables were derived from ELISA tests. The first, a binary variable, assessed the infection status of each animal over the entire productive life, while the second considered the level of antibody recorded over time. Very similar results were obtained for both variables. Heritability estimates of about 0.20 were found and a significant region capturing 18% and 13% of the genetic variance was detected on ovine chromosome 20 by linkage disequilibrium and linkage analysis on OvineSNP50 positions. Functional annotation and association analyses on the imputed sequence polymorphisms that were identified in this region were carried out. No significant variants showed a functional effect on the genes that mapped to this region, most of which belong to the major histocompatibility complex class II (MHC II). However, the conditional analysis led to the identification of two significant polymorphisms that can explain the genetic variance associated with the investigated genomic region. CONCLUSIONS Our results confirm the involvement of the host's genetics in susceptibility to MAP in sheep and suggest that selective breeding may be an option to limit the infection. The estimated heritability is moderate with a relevant portion being due to a highly significant region on ovine chromosome 20. The results of the combined use of sequence-based data and functional analyses suggest several genes belonging to the MHC II as the most likely candidates, although no mutations in their coding regions showed a significant association. Nevertheless, information from genotypes of two highly significant polymorphisms in the region can enhance the efficiency of selective breeding programs.
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Affiliation(s)
- Mario Graziano Usai
- Research Unit Genetics and Biotechnology - Agris Sardegna, 07100, Sassari, Italy
| | - Sara Casu
- Research Unit Genetics and Biotechnology - Agris Sardegna, 07100, Sassari, Italy.
| | - Tiziana Sechi
- Research Unit Genetics and Biotechnology - Agris Sardegna, 07100, Sassari, Italy
| | - Sotero L Salaris
- Research Unit Genetics and Biotechnology - Agris Sardegna, 07100, Sassari, Italy
| | - Sabrina Miari
- Research Unit Genetics and Biotechnology - Agris Sardegna, 07100, Sassari, Italy
| | - Giuliana Mulas
- Research Unit Genetics and Biotechnology - Agris Sardegna, 07100, Sassari, Italy
| | | | - Ciriaco Ligios
- Istituto Zooprofilattico Sperimentale Della Sardegna G. Pegreffi, 07100, Sassari, Italy
| | - Antonello Carta
- Research Unit Genetics and Biotechnology - Agris Sardegna, 07100, Sassari, Italy
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Garcia AA, Plain KM, Thomson PC, Thomas AJ, Davies CJ, Toribio JALML, Whittington RJ. Association between major histocompatibility complex haplotypes and susceptibility of unvaccinated and vaccinated cattle to paratuberculosis. Vet Immunol Immunopathol 2023; 265:110677. [PMID: 37952345 DOI: 10.1016/j.vetimm.2023.110677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 11/02/2023] [Accepted: 11/03/2023] [Indexed: 11/14/2023]
Abstract
Bovine Johne's disease (BJD) or paratuberculosis is caused by Mycobacterium avium spp. paratuberculosis (MAP) and is a worldwide problem among domestic and wild ruminants. While vaccines are available, natural differences in background immunity between breeds within species and between individuals within herds suggest that genetic differences may be able to be exploited in marker-assisted selection as an aid to disease control. The major histocompatibility complex (MHC) is an important component in immune recognition with considerable genetic variability. In this study, associations between the MHC and resistance to BJD were explored in dairy cattle across two herds in which some of the cattle had been vaccinated with Silirum® (n = 540 cows). A BJD susceptible animal was exposed to MAP and became infected, while a resistant animal was exposed but did not become infected. There are different ways to define both exposure and infection, with different levels of stringency, therefore many classifications of the same set of animals are possible and were included in the analysis. The polymorphic regions of major histocompatibility complex class I (MHC I) and class II (MHC II) genes were amplified from the genomic DNA by PCR and sequenced, targeting exons 2 and 3 of the classical and non-classical MHC I genes and exon 2 from the DRB3, DQA1, DQA2 + 3 and DQB MHC II genes. The frequencies of MHC I and MHC II haplotypes and alleles were determined in susceptible and resistant populations. In unvaccinated animals, seven MHC I haplotypes and seven MHC II haplotypes were associated with susceptibility while two MHC I and six MHC II haplotypes were associated with resistance (P < 0.05). In vaccinated animals, two MHC I and three MHC II haplotypes were associated with susceptibility, while one MHC I and two MHC II haplotypes were associated with resistance (P < 0.05). The alleles in significant haplotypes were also identified. Case definitions with higher stringency resulted in fewer animals being included in the analyses, but the power to detect an association was not reduced and there was an increase in strength and consistency of associations. Consistent use of stringent case definitions is likely to improve agreement in future association studies.
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Affiliation(s)
- Anabel A Garcia
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Camden, NSW 2570, Australia
| | - Karren M Plain
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Camden, NSW 2570, Australia
| | - Peter C Thomson
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Camden, NSW 2570, Australia
| | - Aaron J Thomas
- Department of Animal, Dairy and Veterinary Sciences, College of Agriculture and Applied Sciences, Utah State University, Logan, UT 84322, USA
| | - Christopher J Davies
- Department of Animal, Dairy and Veterinary Sciences, College of Agriculture and Applied Sciences, Utah State University, Logan, UT 84322, USA
| | - Jenny-Ann L M L Toribio
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Camden, NSW 2570, Australia
| | - Richard J Whittington
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Camden, NSW 2570, Australia.
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Esmailnejad A, Ganjiani V, Hosseini-Nasab E, Nazifi S. Association of Ovar-DRB1 alleles with innate immune responses in sheep. Vet Med Sci 2021; 8:752-757. [PMID: 34882990 PMCID: PMC8959254 DOI: 10.1002/vms3.683] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Background Major histocompatibility complex (MHC) is the best characterised genetic region associated with adaptive immune responses, including humoral and cell‐mediated immunities. Objectives In this study, the association of MHC class II alleles with inflammatory cytokines and acute‐phase proteins was evaluated in sheep population. Methods Allelic diversity of second exon of ovine DRB1 locus (Ovar‐DRB1.2) was determined in 100 indigenous Iranian Lori‐Bakhtiari fat‐tailed sheep using restriction fragment length polymorphism and direct sequencing methods. The association of DRB1.2 alleles with inflammatory cytokines (interleukin‐1β, IL‐1β; IL‐6 and tumour necrosis factor‐α) and acute‐phase proteins (serum amyloid A, alpha‐1‐acid glycoprotein and haptoglobin) was examined using generalised linear model and multivariate regression analysis. Results Seven distinct RsaI restriction patterns and fourteen alleles were identified in this population. Allele DRB1*2101 showed a negative influence on the IL‐6 response and was associated with lower serum level of IL‐6. DRB1.2 heterozygous individuals also showed higher haptoglobin concentration than homozygotes. Conclusions These results provide additional support for the association between Ovar‐DRB1 alleles and regulation of immune responses in sheep population. Description of MHC polymorphism and its role in the controlling of immune responses will increase our understanding of host–pathogen interactions, and ultimately facilitate the selection of disease‐resistant flocks in genetic breeding programs.
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Affiliation(s)
- Atefeh Esmailnejad
- Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Vahid Ganjiani
- Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | | | - Saeed Nazifi
- Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
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Effect of selected single nucleotide polymorphisms in SLC11A1, ANKRA2, IFNG and PGLYRP1 genes on host susceptibility to Mycobacterium avium subspecies paratuberculosis infection in Indian cattle. Vet Res Commun 2021; 46:209-221. [PMID: 34718924 DOI: 10.1007/s11259-021-09849-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 10/10/2021] [Indexed: 10/19/2022]
Abstract
Paratuberculosis (PTB) is a chronic infectious enteritis of ruminants, caused by Mycobacterium avium subspecies paratuberculosis (MAP) that brings huge economic loss to the dairy farmers. The study was conducted to explore the association of selected SNPs in IFNG, SLC11A1, ANKRA2 and PGLYRP1 genes with resistance to PTB disease in Indian cattle population. A case-control resource population was established based on the results of diagnostic tests used for detection of MAP infection status viz. ELISA, Johnin PPD test, faecal microscopy and IS900 blood PCR. The PCR-RFLP method was used for genotyping of SNPs. SNPs rs109453173 in SLC11A1, rs110853455 in IFNG and rs41933863 in ANKRA2 genes were significantly (P<0.05) associated with resistance to MAP infection. For SNP rs109453173, GG genotype and G allele was found to be associated with resistance against MAP infection than CC and CG genotypes and C allele, respectively. For SNP rs110853455, AG genotype was found to be associated with susceptibility to MAP infection than AA and GG genotype. For SNP rs41933863, the AG genotype provided three and six times more resistance against MAP infection than GG and AA genotype. The results of this study are suggestive of SNPs rs109453173, rs110853455 and rs41933863 as potential markers for screening MAP resistant cattle and a breeding programme favouring GG genotype and G allele for rs109453173, AG genotype for rs41933863 and against AG genotype for rs110853455 might confer resistance against MAP infection in Indian cattle. However, investigation of these SNPs in an independent and larger population will warrant the strength of association for resistance against MAP infection in cattle.
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Kravitz A, Pelzer K, Sriranganathan N. The Paratuberculosis Paradigm Examined: A Review of Host Genetic Resistance and Innate Immune Fitness in Mycobacterium avium subsp. Paratuberculosis Infection. Front Vet Sci 2021; 8:721706. [PMID: 34485444 PMCID: PMC8414637 DOI: 10.3389/fvets.2021.721706] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 07/23/2021] [Indexed: 11/13/2022] Open
Abstract
Paratuberculosis, or Johne's Disease (JD) is a debilitating chronic enteritis mainly affecting ruminants caused by Mycobacterium avium subsp. paratuberculosis (MAP). This organism causes worldwide economic losses to the livestock industry, and is of public health importance due to the potential zoonotic risk between MAP and Crohn's disease (CD) in humans. Without economical treatments, or a vaccine capable of preventing infection without causing cross-reactions with bovine tuberculosis, test-and-cull methods for disease control are imperative. Unfortunately, difficulties in diagnostics and long subclinical stage hinder adequate control and is further complicated by variation in MAP exposure outcome. Interestingly, the majority of infections result in asymptomatic presentation and never progress to clinical disease. One contributing factor is host genetics, where polymorphisms in innate immune genes have been found to influence resistance and susceptibility to disease. Candidate genes identified across studies overlap with those found in CD and tuberculosis including; Solute carrier family 11 member 1 gene (SLC11A1), Nucleotide-binding-oligomerization domain containing gene 2 (NOD2), Major histocompatibility complex type II (MHC-II), and Toll-like receptor (TLR) genes. This review will highlight evidence supporting the vital role of these genes in MAP infection outcome, associated challenges, and implications for the future of JD research.
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Affiliation(s)
- Amanda Kravitz
- Department of Biomedical Sciences and Pathobiology, Center for One Health Research, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Kevin Pelzer
- Department of Large Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Nammalwar Sriranganathan
- Department of Biomedical Sciences and Pathobiology, Center for One Health Research, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
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Arteche-Villasol N, Gutiérrez-Expósito D, Vallejo R, Espinosa J, Elguezabal N, Ladero-Auñon I, Royo M, Del Carmen Ferreras M, Benavides J, Pérez V. Early response of monocyte-derived macrophages from vaccinated and non-vaccinated goats against in vitro infection with Mycobacterium avium subsp. paratuberculosis. Vet Res 2021; 52:69. [PMID: 33980310 PMCID: PMC8117269 DOI: 10.1186/s13567-021-00940-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 04/20/2021] [Indexed: 12/27/2022] Open
Abstract
Paratuberculosis is a disease of ruminants caused by Mycobacterium avium subsp. paratuberculosis (Map). Vaccination is the most cost-effective control method. However, despite the fact that macrophages are the main target cells for this pathogen, the precise mechanisms behind the response of the macrophage to Map infection and how it is modified by vaccination are yet poorly understood. The aim of this study was to investigate the effect of Silirum® vaccination in the early immune response of caprine monocyte-derived macrophages (CaMØs). Peripheral blood mononuclear cells (PBMCs) were obtained from vaccinated and non-vaccinated goats, cultured in vitro until differentiation to macrophages and infected with Map. After a 24 h incubation, Map viability and DNA were assessed in culture by viable colony count and real time quantitative polymerase chain reaction (qPCR). In addition, Map phagocytosis and expression of IL-10, IL-12, IFN-γ, TNF-α, IL-17A, IL-1β, iNOS, IL-6 and MIP-1β were also evaluated through immunofluorescence labelling and reverse transcriptase qPCR (RT-qPCR), respectively. A significant reduction of Map viability was observed in both supernatants (P < 0.05) and CaMØs (P < 0.001) from the vaccinated group. Similarly, the percentage of infected CaMØs and the number of internalized Map by CaMØs (P < 0.0001) was higher in the vaccinated group. Finally, iNOS (P < 0.01) and IL-10 were significantly up-regulated in CaMØs from vaccinated goats, whereas only MIP-1β was up-regulated in non-vaccinated animals (P < 0.05). These results show that vaccination modifies the immune response of CaMØs, suggesting that the phagocytosis and microbiocidal activity of macrophages against Map is enhanced after vaccination.
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Affiliation(s)
- Noive Arteche-Villasol
- Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad de León, Campus de Vegazana s/n, 24007, León, Spain.
| | - Daniel Gutiérrez-Expósito
- Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad de León, Campus de Vegazana s/n, 24007, León, Spain
| | - Raquel Vallejo
- Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad de León, Campus de Vegazana s/n, 24007, León, Spain
| | - Jose Espinosa
- Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad de León, Campus de Vegazana s/n, 24007, León, Spain
| | - Natalia Elguezabal
- Departamento de Sanidad Animal, NEIKER-Instituto Vasco de Investigación y Desarrollo Agrario, Berreaga 1, Derio, 48169, Bizkaia, Spain
| | - Iraia Ladero-Auñon
- Departamento de Sanidad Animal, NEIKER-Instituto Vasco de Investigación y Desarrollo Agrario, Berreaga 1, Derio, 48169, Bizkaia, Spain
| | - Marcos Royo
- Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad de León, Campus de Vegazana s/n, 24007, León, Spain
| | - María Del Carmen Ferreras
- Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad de León, Campus de Vegazana s/n, 24007, León, Spain
| | - Julio Benavides
- Instituto de Ganadería de Montaña (CSIC-ULE),, Finca Marzanas-Grulleros, 24346, León, Spain
| | - Valentín Pérez
- Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad de León, Campus de Vegazana s/n, 24007, León, Spain
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Greenstein RJ, Su L, Grant IR, Foddai ACG, Turner A, Nagati JS, Brown ST, Stabel JR. Comparison of a mycobacterial phage assay to detect viable Mycobacterium avium subspecies paratuberculosis with standard diagnostic modalities in cattle with naturally infected Johne disease. Gut Pathog 2021; 13:30. [PMID: 33957980 PMCID: PMC8103604 DOI: 10.1186/s13099-021-00425-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 04/29/2021] [Indexed: 11/10/2022] Open
Abstract
Background Mycobacterium avium subspecies paratuberculosis (MAP), the cause of Johne disease, is a slow growing mycobacterium. Viable MAP detection is difficult, inconstant and time-consuming. The purpose of this study was to compare a rapid phage/qPCR assay performed on peripheral blood mononuclear cells (PBMCs) with three standard methods of MAP detection: fecal MAP PCR; plasma antigen-specific IFN-γ & serum MAP ELISA hypothesizing that, if sensitive and specific, Johne animals would be positive and Control animals negative. We studied a well characterized herd of Holstein cattle that were naturally infected with MAP and their Controls. Results With phage/qPCR 72% (23/32) of Johne and 35% (6/17) of Controls were MAP positive. With fecal PCR 75% (24/32) of Johne and 0% (0/17) of Controls were MAP positive. With plasma antigen-specific IFN-γ 69% (22/32) of Johne and 12% (2/17) of Controls were MAP positive. With serum MAP ELISA, 31% (10/32) of Johne and 0% (0/17) of Controls were MAP positive. When phage / qPCR and fecal PCR results were combined, 100% (32/32) Johne and 35% (6/17) of Control animals were MAP positive. Younger Control animals (1–3 years) had significantly fewer plaques (25 ± 17 SEM) than older Controls (4–12 years) (309 ± 134 p = 0.04). The same trend was not observed in the Johne animals (p = 0.19). Conclusions In contrast to our hypothesis, using the phage/qPCR assay we find that viable circulating MAP can rapidly be detected from the blood of animals infected with, as well as those in the Control group evidently colonized by MAP. These data indicate that the presence of viable MAP in blood does not necessarily signify that an animal must of necessity be demonstrably ill or be MAP positive by standard diagnostic methods.
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Affiliation(s)
- Robert J Greenstein
- Department of Surgery, James J. Peters Veterans Affairs Medical Center, Bronx, NY, USA. .,Laboratory of Molecular Surgical Research, James J. Peters Veterans Affairs Medical Center, Bronx, NY, USA.
| | - Liya Su
- Laboratory of Molecular Surgical Research, James J. Peters Veterans Affairs Medical Center, Bronx, NY, USA
| | - Irene R Grant
- Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Belfast, UK
| | - Antonio C G Foddai
- Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Belfast, UK
| | - Amy Turner
- Johne's Disease Research Project USDA-ARS-NADC, Ames, IA, USA
| | - Jason S Nagati
- Department of Medicine, Columbia University Medical Center, New York, NY, USA
| | - Sheldon T Brown
- Infectious Disease Section, James J. Peters Veterans Affairs Medical Center, Bronx, NY, USA.,Department of Medicine, Icahn School of Medicine at Mt. Sinai, New York, NY, USA
| | - Judith R Stabel
- Johne's Disease Research Project USDA-ARS-NADC, Ames, IA, USA
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Yaman Y, Aymaz R, Keleş M, Bay V, Hatipoğlu E, Kaptan C, Başkurt A, Yilmaz O, Heaton MP. Evaluation of CD109, PCP4 and SEMA3D genes for their association with Ovine Johne's disease in Turkish sheep. Anim Biotechnol 2021; 32:519-525. [PMID: 33612073 DOI: 10.1080/10495398.2021.1887880] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Johne's disease is a chronic, contagious, zoonotic disease that affects numerous species including livestock and sometimes humans. The disease is globally distributed in sheep populations and caused by Mycobacterium avium Subsp. paratuberculosis (MAP). A previous genome-wide association study identified single nucleotide polymorphism (SNP) markers associated with OJD serostatus in CD109, PCP4, and SEMA3D genes. Our aim was to evaluate the same markers for association with OJD seroprevalence in Turkish sheep in a retrospective matched case-control study. The serological status for OJD in 1801 sheep was determined for four native and four composite breeds from three research flocks. One hundred eleven matched case-control pairs were constructed according to breed type and age from 1750 comingled ewes reared in the same environment. A Single Nucleotide Primer Extension (SNuPE) assay was designed to genotype PCP4-Intron 1, PCP4-3'UTR, SEMA3D, CD109-intron 2 and CD109-intron 8 markers and a McNemar's test was performed on the matched pairs. An association with these five markers was not detected with the OJD serostatus in Turkish sheep (power of detection, 0.95; odds ratio >3; McNemar's p < .05). Thus, a wider search may be needed to identify any major underlying genetic risk factors for OJD in Turkish sheep.
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Affiliation(s)
- Yalçın Yaman
- Department of Biometry and Genetics, Sheep Breeding and Research Institute, Bandirma, Balikesir, Turkey
| | - Ramazan Aymaz
- Department of Biometry and Genetics, Sheep Breeding and Research Institute, Bandirma, Balikesir, Turkey
| | - Murat Keleş
- Department of Biometry and Genetics, Sheep Breeding and Research Institute, Bandirma, Balikesir, Turkey
| | - Veysel Bay
- Department of Biometry and Genetics, Sheep Breeding and Research Institute, Bandirma, Balikesir, Turkey
| | - Ecem Hatipoğlu
- Department of Biometry and Genetics, Sheep Breeding and Research Institute, Bandirma, Balikesir, Turkey
| | - Cüneyt Kaptan
- Department of Biometry and Genetics, Sheep Breeding and Research Institute, Bandirma, Balikesir, Turkey
| | - Atilla Başkurt
- Department of Biometry and Genetics, Sheep Breeding and Research Institute, Bandirma, Balikesir, Turkey
| | - Onur Yilmaz
- Department of Animal Science, Faculty of Agriculture, Aydın Adnan Menderes University, Aydın, Turkey
| | - Michael P Heaton
- Department of Genetics, U.S. Meat Animal Research Center, USDA, ARS, Clay Center, NE, USA
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Irivboje YI, Sanni MT, Fafiolu AO, Olowofeso O, Ikeobi CON. Genetic polymorphisms in part of intron 7 and exon 8 of HSP90AA1 gene and its association with heat tolerance traits in two exotic layer chicken strains. Trop Anim Health Prod 2019; 52:969-977. [PMID: 31707685 DOI: 10.1007/s11250-019-02079-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 09/11/2019] [Indexed: 12/19/2022]
Abstract
Chickens, like other vertebrates, react to stress conditions through their cultured cells by expressing heat shock proteins (HSPs). Genetic association of single-nucleotide polymorphisms (SNPs) in HSPs with desirable traits will reveal their importance as potential genetic markers. Blood samples were collected from 50 birds per strain for DNA extraction, polymerase chain reaction amplification and sequencing of the HSP90AA1 gene. SNPs were detected using Codoncode Aligner. Association of each SNP with heat tolerance traits was analysed using generalized linear model procedure of SAS. A total of seven SNPs were detected, four SNPs; A7T, A160T, T223A and C134T were detected in part of intron 7 to exon 8 of HSP90AA1 gene of BRD while three A160T, T223A and C134T were detected in HYL. SNPC134T, a synonymous variant, was detected in exon 8. Only SNPA7T was in Hardy-Weinberg equilibrium (X2 = 0.03) but had no association with the traits measured. Polymorphic information content calculated showed SNPA160T to be moderately polymorphic; other SNPs were lowly polymorphic. Heterozygosity for SNPs-A160T and T223A of BRD showed moderate genetic variation while the other SNPs and those in HYL recorded low genetic variation. The study concluded that the SNPs detected were majorly lowly polymorphic and also the SNP locus A7T in intron 7 of HSP90AA1 of BRD had no genetic association with heat tolerance traits.
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Affiliation(s)
- Young I Irivboje
- World Bank Centre of Excellence in Agricultural Development and Sustainable Environment, Federal University of Agriculture, Abeokuta, Nigeria. .,Department of Animal Breeding and genetics, Federal University of Agriculture, Abeokuta, Nigeria.
| | - M T Sanni
- Department of Animal Breeding and genetics, Federal University of Agriculture, Abeokuta, Nigeria
| | - A O Fafiolu
- World Bank Centre of Excellence in Agricultural Development and Sustainable Environment, Federal University of Agriculture, Abeokuta, Nigeria.,Department of Animal Nutrition, Federal University of Agriculture, Abeokuta, Nigeria
| | - O Olowofeso
- World Bank Centre of Excellence in Agricultural Development and Sustainable Environment, Federal University of Agriculture, Abeokuta, Nigeria.,Department of Animal Breeding and genetics, Federal University of Agriculture, Abeokuta, Nigeria
| | - C O N Ikeobi
- World Bank Centre of Excellence in Agricultural Development and Sustainable Environment, Federal University of Agriculture, Abeokuta, Nigeria.,Department of Animal Breeding and genetics, Federal University of Agriculture, Abeokuta, Nigeria
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Ni WW, E GX, Basang WD, Zhu YB, Huang YF. Molecular Variant Estimation of SLC11A1 Related Microsatellites in Chinese Indigenous Goats. RUSS J GENET+ 2019. [DOI: 10.1134/s102279541908009x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Gene expression profiles during subclinical Mycobacterium avium subspecies paratuberculosis infection in sheep can predict disease outcome. Sci Rep 2019; 9:8245. [PMID: 31160677 PMCID: PMC6547741 DOI: 10.1038/s41598-019-44670-w] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 05/22/2019] [Indexed: 01/19/2023] Open
Abstract
Paratuberculosis in ruminants is caused by infection with Mycobacterium avium subspecies paratuberculosis (MAP) however exposure does not predetermine progression to clinical disease. The pathogenesis incorporates a subclinical phase during which MAP is capable of evading host immune responses through adaptation of host cellular immune mechanisms. Presented are results of transcriptomic analysis of Merino sheep experimentally exposed to MAP and repeatedly sampled over the subclinical phase, identifying genes consistently changed over time in comparison to unexposed controls and associated with different disease outcomes. MAP exposed sheep were classified as diseased 45% (n = 9) or resilient 55% (n = 11). Significant gene expression changes were identified in the white blood cells of paucibacillary (n = 116), multibacillary (n = 98) and resilient cohorts (n = 53) compared to controls. Members of several gene families were differentially regulated, including S100 calcium binding, lysozyme function, MHC class I and class II, T cell receptor and transcription factors. The microarray findings were validated by qPCR. These differentially regulated genes are presented as putative biomarkers of MAP exposure, or of the specified disease or resilience outcomes. Further, in silico functional analysis of genes suggests that experimental MAP exposure in Merino sheep results in adaptations to cellular growth, proliferation and lipid metabolism.
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Ruiz-Larrañaga O, Langa J, Rendo F, Manzano C, Iriondo M, Estonba A. Genomic selection signatures in sheep from the Western Pyrenees. Genet Sel Evol 2018; 50:9. [PMID: 29566643 PMCID: PMC5865298 DOI: 10.1186/s12711-018-0378-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 02/12/2018] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The current large spectrum of sheep phenotypic diversity results from the combined product of sheep selection for different production traits such as wool, milk and meat, and its natural adaptation to new environments. In this study, we scanned the genome of 25 Sasi Ardi and 75 Latxa sheep from the Western Pyrenees for three types of regions under selection: (1) regions underlying local adaptation of Sasi Ardi semi-feral sheep, (2) regions related to a long traditional dairy selection pressure in Latxa sheep, and (3) regions experiencing the specific effect of the modern genetic improvement program established for the Latxa breed during the last three decades. RESULTS Thirty-two selected candidate regions including 147 annotated genes were detected by using three statistical parameters: pooled heterozygosity H, Tajima's D, and Wright's fixation index Fst. For Sasi Ardi sheep, chromosomes Ovis aries (OAR)4, 6, and 22 showed the strongest signals and harbored several candidate genes related to energy metabolism and morphology (BBS9, ELOVL3 and LDB1), immunity (NFKB2), and reproduction (H2AFZ). The major genomic difference between Sasi Ardi and Latxa sheep was on OAR6, which is known to affect milk production, with highly selected regions around the ABCG2, SPP1, LAP3, NCAPG, LCORL, and MEPE genes in Latxa sheep. The effect of the modern genetic improvement program on Latxa sheep was also evident on OAR15, on which several olfactory genes are located. We also detected several genes involved in reproduction such as ESR1 and ZNF366 that were affected by this selection program. CONCLUSIONS Natural and artificial selection have shaped the genome of both Sasi Ardi and Latxa sheep. Our results suggest that Sasi Ardi traits related to energy metabolism, morphological, reproductive, and immunological features have been under positive selection to adapt this semi-feral sheep to its particular environment. The highly selected Latxa sheep for dairy production showed clear signatures of selection in genomic regions related to milk production. Furthermore, our data indicate that the selection criteria applied in the modern genetic improvement program affect immunity and reproduction traits.
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Affiliation(s)
- Otsanda Ruiz-Larrañaga
- Genetics, Physical Anthropology and Animal Physiology Department, University of the Basque Country (UPV/EHU), Leioa, Spain.
| | - Jorge Langa
- Genetics, Physical Anthropology and Animal Physiology Department, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Fernando Rendo
- Genetics, Sequencing and Genotyping Unit, Advanced Research Facilities (SGIker), University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Carmen Manzano
- Genetics, Physical Anthropology and Animal Physiology Department, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Mikel Iriondo
- Genetics, Physical Anthropology and Animal Physiology Department, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Andone Estonba
- Genetics, Physical Anthropology and Animal Physiology Department, University of the Basque Country (UPV/EHU), Leioa, Spain
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Cecchi F, Russo C, Fratini F, Turchi B, Preziuso G, Cantile C. Preliminary association analysis of microsatellites and Mycobacterium avium subspecies paratuberculosis infection in the native Garfagnina goats. JOURNAL OF APPLIED ANIMAL RESEARCH 2017. [DOI: 10.1080/09712119.2017.1417129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Francesca Cecchi
- Department of Veterinary Science, University of Pisa, Pisa, Italy
| | - Claudia Russo
- Department of Veterinary Science, University of Pisa, Pisa, Italy
| | - Filippo Fratini
- Department of Veterinary Science, University of Pisa, Pisa, Italy
| | - Barbara Turchi
- Department of Veterinary Science, University of Pisa, Pisa, Italy
| | | | - Carlo Cantile
- Department of Veterinary Science, University of Pisa, Pisa, Italy
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Whittington RJ, Begg DJ, de Silva K, Purdie AC, Dhand NK, Plain KM. Case definition terminology for paratuberculosis (Johne's disease). BMC Vet Res 2017; 13:328. [PMID: 29121939 PMCID: PMC5680782 DOI: 10.1186/s12917-017-1254-6] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 10/31/2017] [Indexed: 11/24/2022] Open
Abstract
Paratuberculosis (Johne's disease) is an economically significant condition caused by Mycobacterium avium subsp. paratuberculosis. However, difficulties in diagnosis and classification of individual animals with the condition have hampered research and impeded efforts to halt its progressive spread in the global livestock industry. Descriptive terms applied to individual animals and herds such as exposed, infected, diseased, clinical, sub-clinical, infectious and resistant need to be defined so that they can be incorporated consistently into well-understood and reproducible case definitions. These allow for consistent classification of individuals in a population for the purposes of analysis based on accurate counts. The outputs might include the incidence of cases, frequency distributions of the number of cases by age class or more sophisticated analyses involving statistical comparisons of immune responses in vaccine development studies, or gene frequencies or expression data from cases and controls in genomic investigations. It is necessary to have agreed definitions in order to be able to make valid comparisons and meta-analyses of experiments conducted over time by a given researcher, in different laboratories, by different researchers, and in different countries. In this paper, terms are applied systematically in an hierarchical flow chart to enable classification of individual animals. We propose descriptive terms for different stages in the pathogenesis of paratuberculosis to enable their use in different types of studies and to enable an independent assessment of the extent to which accepted definitions for stages of disease have been applied consistently in any given study. This will assist in the general interpretation of data between studies, and will facilitate future meta-analyses.
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Affiliation(s)
- R. J. Whittington
- Sydney School of Veterinary Science and School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 425 Werombi Road, Camden, NSW 2570 Australia
| | - D. J. Begg
- Sydney School of Veterinary Science and School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 425 Werombi Road, Camden, NSW 2570 Australia
| | - K. de Silva
- Sydney School of Veterinary Science and School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 425 Werombi Road, Camden, NSW 2570 Australia
| | - A. C. Purdie
- Sydney School of Veterinary Science and School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 425 Werombi Road, Camden, NSW 2570 Australia
| | - N. K. Dhand
- Sydney School of Veterinary Science and School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 425 Werombi Road, Camden, NSW 2570 Australia
| | - K. M. Plain
- Sydney School of Veterinary Science and School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 425 Werombi Road, Camden, NSW 2570 Australia
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Abraham A, Naicy T, Raghavan KC, Siju J, Aravindakshan T. Evaluation of the association of SLC11A1 gene polymorphism with incidence of paratuberculosis in goats. J Genet 2017; 96:641-646. [DOI: 10.1007/s12041-017-0820-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Begg DJ, Purdie AC, de Silva K, Dhand NK, Plain KM, Whittington RJ. Variation in susceptibility of different breeds of sheep to Mycobacterium avium subspecies paratuberculosis following experimental inoculation. Vet Res 2017. [PMID: 28623935 PMCID: PMC5474048 DOI: 10.1186/s13567-017-0440-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Exposure to Mycobacterium avium subspecies paratuberculosis (MAP) does not always lead to Johne’s disease. Understanding differences in disease susceptibility of individual animals is a key aspect to controlling mycobacterial diseases. This study was designed to examine the susceptibility or resistance of various breeds of sheep to MAP infection. Merino, Suffolk first cross Merino, Border Leicester, and Poll Dorset sheep were orally inoculated with MAP and monitored for 14 months. Clinical disease occurred more frequently in the Merino (42%) and Suffolk first cross Merino (36%) compared to the Border Leicester (12%) and Poll Dorset (11%) breeds. Infection risk, as determined by culture of gut and associated lymphoid tissues, ranged from 75% for the Suffolk first cross Merino to 47% for the Poll Dorset sheep. Significant differences were identified in the site in the intestines of the most severe histopathological lesions and the immune responses to infection between the breeds. However, there was no difference in faecal MAP shedding by clinical cases between breeds. All breeds tested were susceptible to MAP infection, as determined by infection and clinical disease development, although there were differences in the proportions of diseased animals between the breeds. Poll Dorset and Border Leicester sheep were more resilient to MAP infection but there was evidence that more animals could have developed disease if given more time. These findings provide evidence of potential differential disease susceptibility between breeds, further our understanding of disease pathogenesis and risks of disease spread, and may have an influence on control programs for paratuberculosis.
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Affiliation(s)
- D J Begg
- Farm Animal and Veterinary Public Health, Sydney School of Veterinary Science and School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 425 Werombi Rd, Camden, NSW, 2570, Australia
| | - A C Purdie
- Farm Animal and Veterinary Public Health, Sydney School of Veterinary Science and School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 425 Werombi Rd, Camden, NSW, 2570, Australia
| | - K de Silva
- Farm Animal and Veterinary Public Health, Sydney School of Veterinary Science and School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 425 Werombi Rd, Camden, NSW, 2570, Australia
| | - N K Dhand
- Farm Animal and Veterinary Public Health, Sydney School of Veterinary Science and School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 425 Werombi Rd, Camden, NSW, 2570, Australia
| | - K M Plain
- Farm Animal and Veterinary Public Health, Sydney School of Veterinary Science and School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 425 Werombi Rd, Camden, NSW, 2570, Australia
| | - R J Whittington
- Farm Animal and Veterinary Public Health, Sydney School of Veterinary Science and School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 425 Werombi Rd, Camden, NSW, 2570, Australia.
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Identification of candidate genes for paratuberculosis resistance in the native Italian Garfagnina goat breed. Trop Anim Health Prod 2017; 49:1135-1142. [DOI: 10.1007/s11250-017-1306-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 04/26/2017] [Indexed: 01/10/2023]
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20
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Mortier RAR, Barkema HW, De Buck J. Susceptibility to and diagnosis of Mycobacterium avium subspecies paratuberculosis infection in dairy calves: A review. Prev Vet Med 2015; 121:189-98. [PMID: 26321657 DOI: 10.1016/j.prevetmed.2015.08.011] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 07/31/2015] [Accepted: 08/18/2015] [Indexed: 12/18/2022]
Abstract
The primary objectives of paratuberculosis control programs are reducing exposure of calves to Mycobacterium avium subspecies paratuberculosis (MAP), reducing herd infection pressure and regular testing of cattle >36 months of age. Although control programs based on these principles have reduced prevalence of MAP infection in dairy herds, they have generally not eliminated the infection. Recent infection trial(s) have yielded new knowledge regarding diagnostic testing and age- and dose-dependent susceptibility to MAP infection. Calves up to 1 year of age are still susceptible to MAP infection; therefore, control programs should refrain from referring to specific ages with respect to susceptibility and prevention of new infections. Notwithstanding, lesions were more severe when calves were inoculated at 2 weeks versus 1 year of age. Furthermore, a high inoculation dose resulted in more pronounced lesions than a low inoculation dose, especially in young calves. Consequently, keeping infection pressure low should decrease the incidence of new MAP infections and severity of JD in cattle that do acquire the infection. It was also evident that early diagnosis of MAP infection was possible and could improve efficacy of control programs. Although its use will still need to be validated in the field, a combination of antibody ELISA and fecal culture in young stock, in addition to testing cattle >36 months of age when screening a herd for paratuberculosis, was expected to improve detection of dairy cattle infected with MAP. Although calves were inoculated using a standardized method in a controlled environment, there were substantial differences among calves with regards to immune response, shedding and pathology. Therefore, we inferred there were genetic differences in susceptibility. Important insights were derived from experimental infection trials. Therefore, it was expected that these could improve paratuberculosis control programs by reducing severity and incidence of JD by lowering infection pressure on-farm, and reducing exposure of young calves and older cattle. Furthermore, an earlier diagnosis could be achieved by combining ELISA and fecal shedding in young stock, in addition to testing cattle >36 months of age.
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Affiliation(s)
- Rienske A R Mortier
- Department of Production Animal Health, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, Canada.
| | - Herman W Barkema
- Department of Production Animal Health, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, Canada.
| | - Jeroen De Buck
- Department of Production Animal Health, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, Canada.
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21
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Kumar R, Gupta ID, Verma A, Verma N, Vineeth MR. Genetic polymorphisms within exon 3 of heat shock protein 90AA1 gene and its association with heat tolerance traits in Sahiwal cows. Vet World 2015; 8:932-6. [PMID: 27047179 PMCID: PMC4774691 DOI: 10.14202/vetworld.2015.932-936] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Revised: 06/24/2015] [Accepted: 07/02/2015] [Indexed: 01/06/2023] Open
Abstract
AIM The present study was undertaken to identify novel single nucleotide polymorphism (SNP) in Exon 3 of HSP90AA1 gene and to analyze their association with respiration rate (RR) and rectal temperature (RT) in Sahiwal cows. MATERIALS AND METHODS The present study was carried out in Sahiwal cows (n=100) with the objectives to identify novel SNP in exon 3 of HSP90AA1 gene and to explore the association with heat tolerance traits. CLUSTAL-W multiple sequence analysis was used to identify novel SNPs in exon 3 of HSP90AA1 gene in Sahiwal cows. Gene and genotype frequencies of different genotypes were estimated by standard procedure POPGENE version 1.32 (University of Alberta, Canada). The significant effect of SNP variants on physiological parameters, e.g. RR and RT were analyzed using the General Linear model procedure of SAS Version 9.2. RESULTS The polymerase chain reaction product with the amplicon size of 450 bp was successfully amplified, covering exon 3 region of HSP90AA1 gene in Sahiwal cows. On the basis of comparative sequence analysis of Sahiwal samples (n=100), transitional mutations were detected at locus A1209G as compared to Bos taurus (NCBI GenBank AC_000178.1). After chromatogram analysis, three genotypes AA, AG, and GG with respective frequencies of 0.23, 0.50, and 0.27 ascertained. RR and RT were recorded once during probable extreme hours in winter, spring, and summer seasons. It was revealed that significant difference (p<0.01) among genetic variants of HSP90AA1 gene with heat tolerance trait was found in Sahiwal cattle. The homozygotic animals with AA genotype had lower heat tolerance coefficient (HTC) (1.78±0.04(a)), as compared to both AG and GG genotypes (1.85±0.03(b) and 1.91±0.02(c)), respectively. The gene and genotype frequencies for the locus A1209G were ascertained. CONCLUSIONS Novel SNP was found at the A1209G position showed all possible three genotypes (homozygous and heterozygous). Temperature humidity index has a highly significant association with RR, RT, and HTC in all the seasons. Perusal of results across different seasons showed the significant (p<0.01) difference in RR, RT, and HTC among winter, spring, and summer seasons. Genetic association with heat tolerance traits reveals their importance as a potential genetic marker for heat tolerance traits in Sahiwal cows.
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Affiliation(s)
- Rakesh Kumar
- Division of Dairy Cattle Breeding, Indian Council of Agricultural Research-National Dairy Research Institute, Karnal, Haryana, India
| | - I. D. Gupta
- Division of Dairy Cattle Breeding, Indian Council of Agricultural Research-National Dairy Research Institute, Karnal, Haryana, India
| | - Archana Verma
- Division of Dairy Cattle Breeding, Indian Council of Agricultural Research-National Dairy Research Institute, Karnal, Haryana, India
| | - Nishant Verma
- Division of Dairy Cattle Breeding, Indian Council of Agricultural Research-National Dairy Research Institute, Karnal, Haryana, India
| | - M. R. Vineeth
- Division of Dairy Cattle Breeding, Indian Council of Agricultural Research-National Dairy Research Institute, Karnal, Haryana, India
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Osborne AJ, Pearson J, Chilvers BL, Kennedy MA, Gemmell NJ. Examining the role of components of Slc11a1 (Nramp1) in the susceptibility of New Zealand sea lions (Phocarctos hookeri) to disease. PLoS One 2015; 10:e0122703. [PMID: 25874773 PMCID: PMC4397024 DOI: 10.1371/journal.pone.0122703] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Accepted: 02/13/2015] [Indexed: 12/20/2022] Open
Abstract
The New Zealand sea lion (NZSL, Phocarctos hookeri) is a Threatened marine mammal with a restricted distribution and a small, declining, population size. The species is susceptible to bacterial pathogens, having suffered three mass mortality events since 1998. Understanding the genetic factors linked to this susceptibility is important in mitigating population decline. The gene solute carrier family 11 member a1 (Slc11a1) plays an important role in mammalian resistance or susceptibility to a wide range of bacterial pathogens. At present, Slc11a1 has not been characterised in many taxa, and despite its known roles in mediating the effects of infectious disease agents, has not been examined as a candidate gene in susceptibility or resistance in any wild population of conservation concern. Here we examine components of Slc11a1 in NZSLs and identify: i) a polymorphic nucleotide in the promoter region; ii) putative shared transcription factor binding motifs between canids and NZSLs; and iii) a conserved polymorphic microsatellite in the first intron of Slc11a1, which together suggest conservation of Slc11a1 gene structure in otariids. At the promoter polymorphism, we demonstrate a shift away from normal allele frequency distributions and an increased likelihood of death from infectious causes with one allelic variant. While this increased likelihood is not statistically significant, lack of significance is potentially due to the complexity of genetic susceptibility to disease in wild populations. Our preliminary data highlight the potential significance of this gene in disease resistance in wild populations; further exploration of Slc11a1 will aid the understanding of susceptibility to infection in mammalian species of conservation significance.
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Affiliation(s)
- Amy J. Osborne
- Department of Anatomy, University of Otago, Dunedin, New Zealand
- Department of Pathology, University of Otago, Christchurch, New Zealand
| | - John Pearson
- Department of Public Health and General Practice, University of Otago, Christchurch, New Zealand
| | - B. Louise Chilvers
- Marine Species and Threats Team, Department of Conservation, Wellington, New Zealand
| | - Martin A. Kennedy
- Department of Pathology, University of Otago, Christchurch, New Zealand
| | - Neil J. Gemmell
- Department of Anatomy, University of Otago, Dunedin, New Zealand
- Allan Wilson Centre for Molecular Ecology and Evolution, University of Otago, Dunedin, New Zealand
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Iacoboni PA, Hasenauer FC, Caffaro ME, Gaido A, Rossetto C, Neumann RD, Salatin A, Bertoni E, Poli MA, Rossetti CA. Polymorphisms at the 3′ untranslated region of SLC11A1 gene are associated with protection to Brucella infection in goats. Vet Immunol Immunopathol 2014; 160:230-4. [DOI: 10.1016/j.vetimm.2014.05.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Revised: 04/04/2014] [Accepted: 05/13/2014] [Indexed: 10/25/2022]
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Vir Singh S, Dhama K, Chaubey KK, Kumar N, Singh PK, Sohal JS, Gupta S, Vir Singh A, Verma AK, Tiwari R, Mahima, Chakraborty S, Deb R. Impact of host genetics on susceptibility and resistance to Mycobacterium avium subspecies Paratuberculosis infection in domestic ruminants. Pak J Biol Sci 2014; 16:251-66. [PMID: 24498788 DOI: 10.3923/pjbs.2013.251.266] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Johne's disease or Paratuberculosis has emerged as major infectious disease of animals in general and domestic livestock in particular on global basis. There have been major initiatives in developed countries for the control of this incurable malady of animals and human beings alike (inflammatory bowel disease or Crohn's disease). Disease has not received similar attention due to inherent complexities of disease, diagnosis and control, in resource poor counties around the world. However, the rich genetic diverstiy of the otherwise low productive animal population offers opportunity for the control of Johne's disease and improve per animal productivity. Present review aims to gather and compile information available on genetics or resistance to Johne's disease and its future exploitation by resource poor countries rich in animal diversity. This review will also help to create awareness and share knowledge and experience on prevalence and opportunities for control of Johne's disease in the livestock population to boost per animal productivity among developing and poor countries of the world. Breeding of animals for disease resistance provides good, safe, effective and cheaper way of controlling Johne's disease in animals, with especial reference to domestic livestock of developing and poor countries. Study will help to establish better understanding of the correlation between host cell factors and resistance to MAP infection which may have ultimately help in the control of Johne's disease in future.
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Affiliation(s)
- Shoor Vir Singh
- Microbiology Lab., Animal Health Division, Central Institute for Research on Goats, Makhdoom, PO-Farah, Mathura (UP)-281122, India
| | - Kuldeep Dhama
- Division of Pathology, Indian Veterinary Research Institute, Izatnagar, Bareilly (UP)-243 122, India
| | - Kundan Kumar Chaubey
- Microbiology Lab., Animal Health Division, Central Institute for Research on Goats, Makhdoom, PO-Farah, Mathura (UP)-281122, India
| | - Naveen Kumar
- Microbiology Lab., Animal Health Division, Central Institute for Research on Goats, Makhdoom, PO-Farah, Mathura (UP)-281122, India
| | - Pravin Kumar Singh
- National JALMA Institute for Leprosy and Other Mycobacterial Diseases (NJIL and OMD), TajGanj, Agra (UP)-282001, India
| | - Jagdip Singh Sohal
- Canadian Food Inspection Agency, 3400 W Casavant, St. Hyacihthe (QC), Canada-J2S 8E3, Canada
| | - Saurabh Gupta
- Microbiology Lab., Animal Health Division, Central Institute for Research on Goats, Makhdoom, PO-Farah, Mathura (UP)-281122, India
| | - Ajay Vir Singh
- Microbiology Lab., Animal Health Division, Central Institute for Research on Goats, Makhdoom, PO-Farah, Mathura (UP)-281122, India
| | - Amit Kumar Verma
- Department of Veterinary Epidemiology and Preventive Medicine, Uttar Pradesh Pandit Deen Dayal Upadhyaya Pashu-Chikitsa Vigyan Vishwavidyalaya Evam Go-Anusandhan Sansthan (DUVASU), Mathura, (UP)-281001, India
| | - Ruchi Tiwari
- Department of Microbiology and Immunology, Uttar Pradesh Pandit Deen Dayal Upadhyaya Pashu-Chikitsa Vigyan Vishwavidyalaya Evam Go-Anusandhan Sansthan (DUVASU), Mathura, (UP)-281001, India
| | - Mahima
- Department of Animal Nutrition, Uttar Pradesh Pandit Deen Dayal Upadhyaya Pashu-Chikitsa Vigyan Vishwavidyalaya Evam Go-Anusandhan Sansthan (DUVASU), Mathura, (UP)-281001, India
| | - S Chakraborty
- Animal Resource Development Department, Pt. Nehru Complex, Agartala, Tripura-799001, India
| | - Rajib Deb
- Animal Genetics and Breeding, Project Directorate on Cattle, Indian Council of Agricultural Research, Grass farm Road, Meerut, Uttar Pradesh-250001, India
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Taka S, Liandris E, Gazouli M, Sotirakoglou K, Theodoropoulos G, Bountouri M, Andreadou M, Ikonomopoulos J. In vitro expression of the SLC11A1 gene in goat monocyte-derived macrophages challenged with Mycobacterium avium subsp paratuberculosis. INFECTION GENETICS AND EVOLUTION 2013; 17:8-15. [PMID: 23567820 DOI: 10.1016/j.meegid.2013.03.033] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Revised: 03/14/2013] [Accepted: 03/20/2013] [Indexed: 11/25/2022]
Abstract
Johne's disease or paratuberculosis is a chronic, progressive intestinal disease of ruminants caused by Mycobacterium avium subsp. paratuberculosis (MAP). One of the genes that have been targeted with regard to resistance or sensitivity to paratuberculosis is the SLC11A1 (solute carrier family 11 member A1). Here we extend our previous work to the sequence and structure analysis of the caprine SLC11A1 gene and we assess the functional impact of the most frequent polymorphisms of the 3' UTR region of the SLC11A1 gene to its expression in goat macrophages exposed in vitro to MAP. The role of these polymorphisms in primary immune response is also investigated with connection to gene expression of two interleukins (IL), one of which pro (IL-1a), and the other anti-inflammatory (IL-10). In order to assess gene response, quantitative detection of the SLC11A1, IL-10 and IL1a mRNA was performed by real time PCR before, and at 1, 3 and 24h after exposure of primary cultures of peripheral blood monocyte-derived macrophages to MAP, collected from 54 goats of the Greek native goat breed. Sequence analysis of the 3' UTR end of the caprine SLC11A1 gene determined its full length to be 522 bases. Structure analysis confirmed the presence of two microsatellites consisted of a variable number of guanine-thymine repeats (regions A and B). The homozygous B7 genotype [B(GTn)7/7] was associated at a statistically significant level with increased expression of the SLC11A1 and IL-1α genes indicating increased in vitro responsiveness and therefore resistance of mononuclear derived macrophages to MAP infection.
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Affiliation(s)
- S Taka
- Department of Anatomy and Physiology of Farm Animals, Faculty of Animal Science and Aquaculture, Agricultural University of Athens, 75 Iera Odos St, 11855 Athens, Greece.
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Dobson B, Liggett S, O'Brien R, Griffin JFT. Innate immune markers that distinguish red deer (Cervus elaphus) selected for resistant or susceptible genotypes for Johne's disease. Vet Res 2013; 44:5. [PMID: 23347398 PMCID: PMC3574005 DOI: 10.1186/1297-9716-44-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Accepted: 01/17/2013] [Indexed: 11/17/2022] Open
Abstract
While many factors contribute to resistance and susceptibility to infectious disease, a major component is the genotype of the host and the way in which it is expressed. Johne’s disease is a chronic inflammatory bowel disease affecting ruminants and is caused by infection with Mycobacterium avium subspecies paratuberculosis (MAP). We have previously identified red deer breeds (Cervus elaphus) that are resistant; have a low rate of MAP infection and do not progress to develop Johne’s disease. In contrast, susceptible breeds have a high rate of MAP infection as seen by seroconversion and progress to develop clinical Johne’s disease. The aim of this study was to determine if immunological differences exist between animals of resistant or susceptible breeds. Macrophage cultures were derived from the monocytes of deer genotypically defined as resistant or susceptible to the development of Johne’s disease. Following in vitro infection of the cells with MAP, the expression of candidate genes was assessed by quantitative PCR as well as infection rate and cell death rate. The results indicate that macrophages from susceptible animals show a significantly higher upregulation of inflammatory genes (iNOS, IL-1α, TNF-α and IL-23p19) than the macrophages from resistant animals. Cells from resistant animals had a higher rate of apoptosis at 24 hours post infection (hpi) compared to macrophages from susceptible animals. The excessive expression of inflammatory mRNA transcripts in susceptible animals could cause inefficient clearing of the mycobacterial organism and the establishment of disease. Controlled upregulation of inflammatory pathways coupled with programmed cell death in the macrophages of resistant animals may predispose the host to a protective immune response against this mycobacterial pathogen.
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Affiliation(s)
- Brooke Dobson
- Disease Research Laboratory, 720 Cumberland St, Dunedin 9016, New Zealand.
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Singh PK, Singh SV, Singh MK, Saxena VK, Horin P, Singh AV, Sohal JS. Effect of genetic variation in the MHC Class II DRB region on resistance and susceptibility to Johne’s disease in endangered Indian Jamunapari goats. Int J Immunogenet 2012; 39:314-20. [PMID: 22321606 DOI: 10.1111/j.1744-313x.2012.01092.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- P K Singh
- Central Institute for Research on Goats, Makhdoom, Mathura, UP, India.
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Abstract
Multiple studies indicate that host animal genetics play a role in susceptibility to Mycobacterium avium subsp. paratuberculosis (MAP) infection. However, due to differences in methods used to define MAP-infected animals and controls and differences in methods of genetic analysis, there is as yet no clear consensus on the genes or markers to reliably define the MAP infection susceptibility of any animal species. Meta-analysis of combined studies and larger studies will help resolve the situation in the coming years.
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Purdie AC, Plain KM, Begg DJ, de Silva K, Whittington RJ. Expression of genes associated with the antigen presentation and processing pathway are consistently regulated in early Mycobacterium avium subsp. paratuberculosis infection. Comp Immunol Microbiol Infect Dis 2012; 35:151-62. [PMID: 22239946 DOI: 10.1016/j.cimid.2011.12.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Revised: 12/14/2011] [Accepted: 12/19/2011] [Indexed: 10/14/2022]
Abstract
The primary objective of this study was to evaluate early gene expression profiles associated with paratuberculosis in cattle exposed to known infectious doses of Mycobacterium avium sub-species paratuberculosis (MAP). A Johne's disease experimental infection field trial was conducted on a mixed population of Holstein and Holstein Red cattle. Blood samples from four MAP exposed and four unexposed cattle, selected based on IFNγ expressions were taken at 9, 13 and 21 weeks and RNA processed to Affymetrix GeneChip™ Bovine Genome arrays. Ontological analysis revealed consistent differences in gene expression between MAP exposed and control animals. A stark variation was observed in expression of a number of genes along antigen presentation pathways, suggesting that MAP exposure potentially results in the host immune response switching to a CD8(+) biased antigen presentation profile. This requires further in-depth analysis since it exposes a hitherto unconfirmed association between MAP exposure and in vivo MHC gene modulation.
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Affiliation(s)
- Auriol C Purdie
- Farm Animal and Veterinary Public Health, University of Sydney, Camden, Australia.
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Immunological and pathological responses of red deer resistant or susceptible genotypes, to experimental challenge with Mycobacterium avium subsp. paratuberculosis. Vet Immunol Immunopathol 2011; 143:131-42. [PMID: 21782254 DOI: 10.1016/j.vetimm.2011.06.035] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Revised: 06/20/2011] [Accepted: 06/27/2011] [Indexed: 11/21/2022]
Abstract
This study aimed to monitor the clinical, immunological and pathological changes in red deer for 49 weeks after experimental oral challenge with Mycobacterium avium subsp. paratuberculosis (MAP) and to assess the heritability of resistance in the offspring of two red stags. Eighteen young deer, which were bred from unselected hinds and sired by two stags resistant (R) or susceptible (S) to paratuberculosis, were challenged with MAP and monitored for 49 weeks. Biopsy samples of the jejunal lymph node were collected at Weeks 4 and 13 and at necropsy after euthanasia of clinically affected animals or when electively killed at Week 49. Three animals (two S and one R) developed clinical disease and were euthanised. The nine S offspring had significantly more severe lesions than the nine R offspring (Mantel-Haenszel Chi-square P=0.017). The average Lesion Severity Score (LSS) of R offspring was 5.9 (mild), and 7/9 had no or very mild lesions. In contrast, the LSS of S offspring averaged 11.7 (severe), and 7/9 had severe lesions. Most of the resistant, but not the susceptible, animals showed evidence of resolving lesions and a reduction in the number of MAP between 13 and 49 weeks after challenge. One R offspring appeared to completely cure itself, and progressed from mild culture-positive paratuberculosis lesions at Week 13 to having no signs of disease or infection 36 weeks later. This study showed significant heritable resistance/susceptibility to paratuberculosis and key differences in immunological responses in the first 3 months after challenge, indicating different paths to relative success or failure to control MAP. In general, R deer had higher IFN-γ levels, low antibody titres and fewer MAP, while S deer had lower IFN-γ levels, higher antibody and more MAP.
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Comparative immunological and microbiological aspects of paratuberculosis as a model mycobacterial infection. Vet Immunol Immunopathol 2011; 148:29-47. [PMID: 21450348 DOI: 10.1016/j.vetimm.2011.03.003] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Revised: 02/12/2011] [Accepted: 03/03/2011] [Indexed: 11/20/2022]
Abstract
Paratuberculosis or Johne's disease of livestock, which is caused by Mycobacterium avium subsp. paratuberculosis (MAP), has increased in prevalence and expanded in geographic and host ranges over about 100 years. The slow and progressive spread of MAP reflects its substantial adaptation to its hosts, the technical limitations of diagnosis, the lack of practical therapeutic approaches, the lack of a vaccine that prevents transmission and the complexity and difficulty of the on-farm control strategies needed to prevent infection. More recently evidence has accumulated for an association of MAP with Crohn's disease in humans, adding to the pressure on animal health authorities to take precautions by controlling paratuberculosis. Mycobacterial infections invoke complex immune responses but the essential determinants of virulence and pathogenesis are far from clear. In this review we compare the features of major diseases in humans and animals that are caused by the pathogenic mycobacteria M. ulcerans, M. avium subsp. avium, M. leprae, M. tuberculosis and MAP. We seek to answer key questions: are the common mycobacterial infections of humans and animals useful "models" for each other, or are the differences between them too great to enable meaningful extrapolation? To simplify this, the immunopathogenesis of mycobacterial infections will be defined at cellular, tissue, animal and population levels and the key events at each level will be discussed. Many pathogenic processes are similar between divergent mycobacterial diseases, and at variance between virulent and avirulent isolates of mycobacteria, suggesting that the research on the pathogenesis of one mycobacterial disease will be informative for the others.
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Purdie AC, Plain KM, Begg DJ, de Silva K, Whittington RJ. Candidate gene and genome-wide association studies of Mycobacterium avium subsp. paratuberculosis infection in cattle and sheep: a review. Comp Immunol Microbiol Infect Dis 2011; 34:197-208. [PMID: 21216466 DOI: 10.1016/j.cimid.2010.12.003] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2010] [Revised: 11/28/2010] [Accepted: 11/29/2010] [Indexed: 11/18/2022]
Abstract
Paratuberculosis (Johne's disease), caused by Mycobacterium avium subspecies paratuberculosis, is responsible for significant economic losses in livestock industries worldwide. This organism is also of public health concern due to an unconfirmed link to Crohn's disease. Susceptibility to paratuberculosis has been suggested to have a genetic component. In livestock, a number of candidate genes have been studied, selected on their association to susceptibility in other mycobacterial diseases, their known role in disease pathogenesis or links to susceptibility of humans to Crohn's disease. These genes include solute carrier family 11 member 1 (SLC11A1, formerly NRAMP1), toll-like receptors, caspase associated recruitment domain 15 (CARD15, formerly NOD2), major histocompatibility complex (MHC) and cytokines (interleukin-10 and interferon-gamma) and their receptors. Genome wide association studies have attempted to confirm associations found and identify new genes involved in pathogenesis and susceptibility. There are a number of limitations and difficulties in these approaches, some peculiar to paratuberculosis but others generally applicable to identification of genetic associations for complex traits. The technical approaches and available information for paratuberculosis have expanded rapidly, particularly relating to sheep and cattle. Here we review the current published evidence for a genetic association with paratuberculosis susceptibility, technological advances that have progressed the field and potential avenues for future research.
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Affiliation(s)
- Auriol C Purdie
- Farm Animal and Veterinary Public Health, Faculty of Veterinary Sciences University of Sydney, Australia
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Pierce ES. Ulcerative colitis and Crohn's disease: is Mycobacterium avium subspecies paratuberculosis the common villain? Gut Pathog 2010; 2:21. [PMID: 21167058 PMCID: PMC3031217 DOI: 10.1186/1757-4749-2-21] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Accepted: 12/17/2010] [Indexed: 12/15/2022] Open
Abstract
Mycobacterium avium, subspecies paratuberculosis (MAP) causes a chronic disease of the intestines in dairy cows and a wide range of other animals, including nonhuman primates, called Johne's ("Yo-knee's") disease. MAP has been consistently identified by a variety of techniques in humans with Crohn's disease. The research investigating the presence of MAP in patients with Crohn's disease has often identified MAP in the "negative" ulcerative colitis controls as well, suggesting that ulcerative colitis is also caused by MAP. Like other infectious diseases, dose, route of infection, age, sex and genes influence whether an individual infected with MAP develops ulcerative colitis or Crohn's disease. The apparently opposite role of smoking, increasing the risk of Crohn's disease while decreasing the risk of ulcerative colitis, is explained by a more careful review of the literature that reveals smoking causes an increase in both diseases but switches the phenotype from ulcerative colitis to Crohn's disease. MAP as the sole etiologic agent of both ulcerative colitis and Crohn's disease explains their common epidemiology, geographic distribution and familial and sporadic clusters, providing a unified hypothesis for the prevention and cure of the no longer "idiopathic" inflammatory bowel diseases.
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Dukkipati VSR, Blair HT, Garrick DJ, Lopez-Villalobos N, Whittington RJ, Reddacliff LA, Eppleston J, Windsor P, Murray A. Association of microsatellite polymorphisms with immune responses to a killed Mycobacterium avium subsp. paratuberculosis vaccine in Merino sheep. N Z Vet J 2010; 58:237-45. [PMID: 20927174 DOI: 10.1080/00480169.2010.69154] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AIM To study the association of polymorphisms at five microsatellite loci with immune responses to a killed Mycobacterium avium subsp. paratuberculosis (Map) vaccine. METHODS Merino sheep (504 vaccinates and 430 unvaccinated controls) from a long-term Johne's vaccine trial undertaken on three different properties in the Central Tablelands of New South Wales, Australia, were genotyped for five microsatellite markers located in three immunologically significant chromosome regions. The marker loci included three from the major histocompatibility complex (MHC), namely DYMS1, OLADRB and SMHCC1; and one each from the solute carrier family 11 member 1 (SLC11A1), OVINRA1, and the interferon-γ (IFN-γ), o(IFN)-γ, gene regions. Associations between immune responses and genetic polymorphisms at the marker loci were examined by analysing both allelic and genotypic effects. RESULTS The o(IFN)-γ locus had only two alleles, whereas the other four loci exhibited extensive polymorphism, with the number of alleles ranging from 10 (OVINRA1) to 21 (DYMS1), resulting in 30-92 genotypes per locus. Heterozygosities varied between 37% (o(IFN)-γ) and 87% (SMHCC1), while information on polymorphic contents ranged from 0.31 (o(IFN)-γ) to 0.87 (DYMS1). Each of the three properties exhibited unique allelic and genotypic frequencies. Analysis of immune response data revealed strong antibody and IFN-γ responses as early as 2 months post-vaccination. Immune responses in control animals on all three properties remained consistently low, except for slightly elevated IFN-γ responses at a few time-points on two properties, concomitant with exposure to natural infection. Genotype-phenotype association analyses revealed a number of marker genotypes/alleles to be significantly associated with antibody and IFN-γ responses. However, the effects of only five genotypes (one each at DYMS1, OLADRB, SMHCC1, OVINRA1 and o(IFN)-γ) and three alleles (one each at o(IFN)-γ, DYMS1and OLADRB) on IFN-γ responses were consistent across the three properties. CONCLUSION Considering the significance of IFN-γ responses in protection against Map, it is possible that the genotypes/alleles identified might have a role in protective immune responses to natural Map infections, and further studies are warranted to confirm this.
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Affiliation(s)
- V S R Dukkipati
- Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North 4442, New Zealand
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Vacca GM, Pazzola M, Pisano C, Carcangiu V, Diaz ML, Nieddu M, Robledo R, Mezzanotte R, Dettori ML. Chromosomal localisation and genetic variation of the SLC11A1 gene in goats (Capra hircus). Vet J 2010; 190:60-5. [PMID: 21071245 DOI: 10.1016/j.tvjl.2010.09.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2010] [Revised: 09/15/2010] [Accepted: 09/30/2010] [Indexed: 12/20/2022]
Abstract
The solute carrier family 11 member A1 (SLC11A1) gene is associated with resistance to infectious diseases. Chromosomal localisation, genomic regions corresponding to functional domains and the genetic variability of microsatellites in the 3' untranslated region (3'-UTR) of this gene were investigated in 427 goats (Capra hircus) of six breeds. Using dual colour fluorescence in situ hybridisation, SLC11A1 was localised to goat chromosome 2. Single strand conformation polymorphism was used to screen for polymorphisms in SLC11A1 exons 2, 10 and 15. There was no variation among goat breeds in the sarcoma homology 3 (SH3) binding motif, the protein kinase C phosphorylation site or the two N-linked glycosylation sites. Exon 15 exhibited variability due to the presence of two polymorphic microsatellites. Genotyping of the upstream guanine-thymine repeat (GTn) at 3'-UTR revealed eight alleles (GT11, GT12, GT14-GT19) in goats, whereas GT13 (present in cattle) was absent. Most goats carried the GT16 allele and no allele was found to be exclusive to only one breed. The coefficient of genetic differentiation value (G(ST)) was 0.084. This microsatellite appears to be an informative DNA marker for genetic linkage analysis in goats.
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Affiliation(s)
- G M Vacca
- Dipartimento di Biologia Animale, Università degli Studi Sassari, 07100 Sassari, Italy.
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Effect of classifying disease states in genetic association studies for paratuberculosis. Prev Vet Med 2010; 95:41-9. [DOI: 10.1016/j.prevetmed.2010.03.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2009] [Revised: 02/26/2010] [Accepted: 03/09/2010] [Indexed: 11/21/2022]
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Korou LM, Liandris E, Gazouli M, Ikonomopoulos J. Investigation of the association of the SLC11A1 gene with resistance/sensitivity of goats (Capra hircus) to paratuberculosis. Vet Microbiol 2010; 144:353-8. [PMID: 20188496 DOI: 10.1016/j.vetmic.2010.01.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2009] [Revised: 01/14/2010] [Accepted: 01/15/2010] [Indexed: 10/19/2022]
Abstract
SLC11A1 (solute carrier family 11 member A1) protein is located on the phagolysosome membrane of macrophages and participates in bacterial killing. Here we have extended our previous work on the investigation of the potential association of polymorphisms of the 3'untranslated region (UTR) of SLC11A1 gene with test-positivity of goats to Mycobacterium avium subsp. paratuberculosis (MAP). Blood, serum and faeces were collected from 223 adult goats, from nine goat farms from Greece with a long-term record of paratuberculosis but no vaccination or tuberculin testing. The samples were subjected to sequence and structure analysis of the SLC11A1 gene and were evaluated by ELISA, culture and real time polymerase chain reaction. The 3'UTR region of the targeted gene revealed 2 microsatellites consisting of a variable number of guanine-thymine repeats named regions A and B. Statistically significant association was recorded between genotypes of region B and ELISA results, whereas the presence of B(7) allele was found to contribute to ELISA negativity. The comparison of the SLC11A1 mRNA level pre- and post-exposure to MAP shows elevated gene expression especially at the 3-h time point, in all macrophages tested regardless of their genotype. Unfortunately the latter could not be linked at a statistically significant level with any of the targeted genetic polymorphisms separately. In conclusion it can be stated that the evidence reported here provide the first indications on the association of B genotypes of the SLC11A1 gene and the detection of MAP-specific antibody by ELISA in goats.
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Affiliation(s)
- Laskarina Maria Korou
- Agricultural University of Athens, Faculty of Animal Science, Laboratory of Anatomy-Physiology, 75 Iera Odos St., 118.55 Athens, Greece
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Marcos-Carcavilla A, Mutikainen M, González C, Calvo JH, Kantanen J, Sanz A, Marzanov NS, Pérez-Guzmán MD, Serrano M. A SNP in the HSP90AA1 gene 5' flanking region is associated with the adaptation to differential thermal conditions in the ovine species. Cell Stress Chaperones 2010; 15:67-81. [PMID: 19496025 PMCID: PMC2866970 DOI: 10.1007/s12192-009-0123-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2009] [Accepted: 05/13/2009] [Indexed: 12/01/2022] Open
Abstract
Molecular chaperones have long been understood to be preferentially transcribed in response to multiple perturbations of the cellular homeostasis. In this study, several polymorphisms in the gene encoding the inducible form of the cytoplasmic Hsp90 (HSP90AA1) were addressed in 24 sheep breeds reared in different climatic regions of Europe, Africa, and Asia. Significant differences in the genotype frequencies for a C/G single nucleotide polymorphism (SNP) located at position -660 in the HSP90AA1 5'flanking region were found between the different breeds. Regression analyses reflected significant correlations (from 0.41 to 0.62) between the alternative genotypes of this polymorphism and several climatic and geographic variables characteristic of the regions where these breeds are reared. Real-time analysis revealed that animals bearing the CC(-660) genotype presented higher expression levels than those presenting the CG(-660) or GG(-660) in summer, but not in spring. Mutation at -660 site seems to affect HSP90AA1 transcription rates which could have important effects on the adaptation to different environmental conditions in sheep. Thus, the variability found in the genotype frequencies for the SNP at -660 in the ovine HSP90AA1 locus could be the result of the different environmental pressures occurring in the regions where these breed are maintained.
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Affiliation(s)
- Ane Marcos-Carcavilla
- Departamento de Mejora Genética Animal, INIA, Ctra. De La Coruña km 7,5, 28040 Madrid, Spain
| | - Mari Mutikainen
- Biotechnology and Food Research, MTT Agrifood Research Finland, 31600 Jokioinen, Finland
| | - Carmen González
- Departamento de Mejora Genética Animal, INIA, Ctra. De La Coruña km 7,5, 28040 Madrid, Spain
| | - Jorge H. Calvo
- Unidad de Tecnología en Producción Animal, CITA, 50059 Zaragoza, Spain
| | - Juha Kantanen
- Biotechnology and Food Research, MTT Agrifood Research Finland, 31600 Jokioinen, Finland
| | - Albina Sanz
- Unidad de Tecnología en Producción Animal, CITA, 50059 Zaragoza, Spain
| | - Nurbiy S. Marzanov
- All-Russian Research Institute of Animal Husbandry, Russian Academy of Agricultural Sciences, Dubrovitsy, 142132 Russia
| | | | - Magdalena Serrano
- Departamento de Mejora Genética Animal, INIA, Ctra. De La Coruña km 7,5, 28040 Madrid, Spain
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Li L, Zhao J, Wang L, Qiu L, Zhang H, Dong C, Cong M, Song L. The polymorphism of lysozyme gene in Zhikong scallop (Chlamys farreri) and its association with susceptibility/resistance to Listonella anguillarum. FISH & SHELLFISH IMMUNOLOGY 2009; 27:136-142. [PMID: 19154789 DOI: 10.1016/j.fsi.2008.12.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2008] [Revised: 12/08/2008] [Accepted: 12/22/2008] [Indexed: 05/27/2023]
Abstract
Lysozyme functions as a crucial biodefence effector against the infection of bacterial pathogens in innate immunity. The nucleotide sequence polymorphisms in promoter region of a nuclear goose type lysozyme gene from Zhikong scallop Chlamys farreri (designated as CFLysG) were investigated to explore their association with susceptibility/resistance to Listonella anguillarum infection. Eight sites of single nucleotide polymorphisms (SNPs) and two sites of insert-deletion (ins-del) polymorphisms were identified in the promoter region of CFLysG. Two of them, -753 TATCTCGATCAGG ins-del polymorphism and -391 A-G SNP were selected to analyze their distribution in the susceptible and resistant stocks, which were identified according to the survival time after L. anguillarum challenge. Using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP), two genotypes were found at each site, which were ins/del and ins/ins at locus -753, and A/A and A/G at locus -391, respectively. The -753 ins/del genotype was more prevalent in the resistant stock than that in the susceptible stock, 30% vs 16.67% in frequency, but there was no significant difference in the frequency distribution between these two stocks (P=0.15). In contrast, the frequency of -391A/G genotype in the resistant stock was significantly higher (30%) than that in the susceptible stock (7.14%) (P=0.007), indicating a significant association with the resistance of Zhikong scallop to L. anguillarum. To confirm the presumption, another independent challenge experiment was performed, in which the cumulative mortality of scallops with -391 A/A genotype (96.8%) was significantly higher than those with -391 A/G genotype (64.5%) (P=0.001), which further validate the association between -391 A/G genotype and the resistance of Zhikong scallop to L. anguillarum. These results suggested that the -391 A/G could be a potential marker applied in future selection of Zhikong scallop with enhanced resistance to L. anguillarum.
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Affiliation(s)
- Ling Li
- Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Rd., Qingdao 266071, China
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Pinedo PJ, Buergelt CD, Donovan GA, Melendez P, Morel L, Wu R, Langaee TY, Rae DO. Candidate gene polymorphisms (BoIFNG, TLR4, SLC11A1) as risk factors for paratuberculosis infection in cattle. Prev Vet Med 2009; 91:189-96. [PMID: 19525022 DOI: 10.1016/j.prevetmed.2009.05.020] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2008] [Revised: 05/12/2009] [Accepted: 05/14/2009] [Indexed: 11/25/2022]
Abstract
Paratuberculosis (Johne's disease) imposes a significant problem to the world dairy and beef industries and today is considered a potential zoonosis. The disease is caused by Mycobacterium avium subsp. paratuberculosis and is characterized by progressive weight loss and profuse diarrhoea. Susceptibility to infection is suspected to have a genetic component, and moderated values for heritability of infection have been reported. Interferon gamma is an inducible cytokine with a crucial role in the innate host response to intracellular bacteria. Toll-like receptors are trans-membrane structures responsible for coordination of innate and adaptive immune responses. The solute carrier family 11 member 1 (SLC11A1, formerly NRAMP1) gene plays an important role in innate immunity, preventing bacterial growth in macrophages during the initial stages of infection. The objective of this candidate gene case-control study was to characterize the distribution of polymorphisms in three candidate genes related to the immune function; interferon gamma (BoIFNG), toll-like receptor 4 (TLR4), and SLC11A1 genes and to test their role as potential risk factors for paratuberculosis infection in cattle. The statistical analysis demonstrated significant differences in allelic frequencies between cases and controls for BoIFNG-SNP(1)2781 and SLC11A1 microsatellites, indicating a significant association between infection and variant alleles. In the analysis of genotypes, a significant association was also found between infection status and BoIFNG-SNP(1)2781 and SLC11A1-275-279-281 microsatellites. However, when variables such as breed and age were included in the multivariate logistic regression analysis, a tendency toward statistical significance for the effect of polymorphisms in the odds of infection was only found for alleles SLC11A1-275 and 279.
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Affiliation(s)
- Pablo J Pinedo
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32610-0136, USA
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Settles M, Zanella R, McKay SD, Schnabel RD, Taylor JF, Whitlock R, Schukken Y, Van Kessel JS, Smith JM, Neibergs H. A whole genome association analysis identifies loci associated with Mycobacterium avium subsp. paratuberculosis infection status in US holstein cattle. Anim Genet 2009; 40:655-62. [PMID: 19422364 DOI: 10.1111/j.1365-2052.2009.01896.x] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The purpose of this study was to identify loci associated with Mycobacterium avium subspecies paratuberculosis (Map) infection status in US Holsteins using the Illumina BovineSNP50 BeadChip whole genome single nucleotide polymorphism (SNP) assay. Two hundred forty-five cows from dairies in New York, Pennsylvania and Vermont enrolled in longitudinal herd studies between January 1999 and November 2007 were assessed for the presence of Map in both faecal and tissue samples. An animal was considered tissue infected if any sample contained at least one colony forming unit of Map per gram of tissue (CFU/g) and the same definition was employed for faecal samples. Each animal was genotyped with the Illumina BovineSNP50 BeadChip and after quality assurance filtering, 218 animals and 45 683 SNPs remained. We sought to identify loci associated with four different case/control classifications: presence of Map in the tissue, presence of Map in faeces, presence of Map in both tissue and faeces and presence of Map in tissue but not faeces. A case-control genome wide association study was conducted to test the four different classifications of Map infection status (cases) when compared with a Map-negative control group (control). Regions on chromosomes 1, 5, 7, 8, 16, 21 and 23 were identified with moderate significance (P < 5 x 10(-5)). Two regions, one on chromosome 3 (near EDN2) and another on chromosome 9 (no positional gene candidates), were identified with a high level of association to the presence of Map in tissue and both tissue and faeces respectively (P < 5 x 10(-7), genome-wide Bonferonni P < 0.05).
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Affiliation(s)
- M Settles
- Department of Animal Sciences, Washington State University, Pullman, WA 99164, USA
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42
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Weiss DJ, Souza CD. Review paper: modulation of mononuclear phagocyte function by Mycobacterium avium subsp. paratuberculosis. Vet Pathol 2008; 45:829-41. [PMID: 18984786 DOI: 10.1354/vp.45-6-829] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Pathogenic mycobacteria are highly adapted for survival within host mononuclear phagocytes. This is largely due to the organism's capacity to prevent macrophage activation, block phagosome acidification and maturation, and attenuate presentation of antigens to the immune system. Mycobacterium avium subsp. paratuberculosis (MAP) is one such organism that modulates the ruminant innate immune response. It is the causative agent in paratuberculosis, a chronic progressive granulomatous enteritis in ruminants. MAP initially interacts with cell membrane receptors on bovine mononuclear phagocytes and initiates cell signaling responses and phagocytosis. Mannosylated liparabinomannan (Man-LAM) is a major component of the MAP cell wall that interacts with the cell membrane of mononuclear phagocytes and may be a major virulence factor. Toll-like receptor 2 (TLR2) has been incriminated as major signaling receptor that binds to MAP and initiates signaling though the mitogen-activated protein kinase (MAPK)-p38 pathway. This pathway induces transcription of interleukin (IL)-10. Early production of IL-10 suppresses proinflammatory cytokines, chemokines, IL-12, and major histocompatability factor class-II expression. Both IL-10 dependent and IL-10 independent mechanisms appear to be involved in attenuation of phagosome acidification and phagolysosome fusion. Many of the suppressive effects of MAP on bovine mononuclear phagocytes can be reproduced by exposure of bovine monocytes to Man-LAM. Therefore, MAP Man-LAM-induced TLR2-MAPK-p38 signaling with resultant excessive IL-10 expression has emerged as one of the mechanisms by which MAP organisms suppress inflammatory, immune, and antimicrobial responses and promote their survival within host mononuclear phagocytes.
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Affiliation(s)
- D J Weiss
- Department of Veterinary and Biomedical Sciences, University of Minnesota, St. Paul, MN 55108, USA.
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Hinger M, Brandt H, Horner S, Erhardt G. Short communication: Association analysis of microsatellites and Mycobacterium avium subspecies paratuberculosis antibody response in German Holsteins. J Dairy Sci 2008; 90:1957-61. [PMID: 17369236 DOI: 10.3168/jds.2006-510] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Paratuberculosis in ruminants is characterized by chronic granulomatous enteritis, resulting in persistent diarrhea and progressive wasting of cattle infected with Mycobacterium avium ssp. paratuberculosis (MAP). The disease occurs worldwide with high frequency, leading to growing economic losses in beef and dairy industries. The objective of this study was to investigate associations of microsatellites (BMC9006, BB704, BB705, BB717, BB719, BMS1617, BB702, and BOBT24) located near or within candidate genes involved in response mechanisms to paratuberculosis. Pedigree information existed for 4,686 German Holstein cows that had routinely been screened for MAP status using commercially available serum antibody ELISA test. The immunoglobulin G cutoff level was used to classify all animals as positive or negative for paratuberculosis. A total of 594 (12.7%) cows tested positive for paratuberculosis. The control group comprised 585 animals testing negative for MAP. Microsatellite BMC9006 had only 3 alleles (2 of which occurred at very low frequencies in the present data set) and was therefore not informative; the remaining microsatellites showed 3 to 12 alleles. Fisher's exact and chi2 tests revealed no significant differences in microsatellite allele frequencies between the 2 groups of German Holstein cows testing positive or negative for paratuberculosis.
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Affiliation(s)
- M Hinger
- Justus-Liebig University, Department of Animal Breeding and Genetics, Giessen, Germany
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Abstract
Johne's disease, or paratuberculosis, is a chronic granulomatous enteritis in ruminants caused by Mycobacterium avium subsp. paratuberculosis (MAP) affecting principally cattle, sheep and goats. Primarily, there are two clinical signs: cachexia and chronic diarrhea (less common in goats and sheep). This disease results in considerable economic losses in livestock industry, particularly the dairy sector. The route of transmission is mostly by the fecal-oral route, but hygienic measures and culling of shedding animals are not sufficient to eradicate this disease. Moreover, diagnostic tools available at this moment are not powerful enough to perform early and specific diagnosis. Existing vaccines, based on whole killed or live-attenuated bacteria, can delay the onset of clinical symptoms but do not protect against infection. Moreover, vaccinated animals develop antibodies that interfere with existing serodiagnostic tests for paratuberculosis and they become reactive in the tuberculin skin test, used for the control of bovine tuberculosis. This review summarizes the current knowledge of the immune responses induced by MAP infection, with focus on cattle studies. It provides an overview of the existing MAP vaccines and comments on the development of second-generation subunit vaccines based on new technologies.
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Affiliation(s)
- Valérie Rosseels
- WIV-Pasteur Institute Brussels, Laboratory of Mycobacterial Immunology, 642 Engelandstraat, B1180 Brussels, Belgium.
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45
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Familial associations with paratuberculosis ELISA results in Texas Longhorn cattle. Vet Microbiol 2008; 129:131-8. [DOI: 10.1016/j.vetmic.2007.10.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2007] [Revised: 10/26/2007] [Accepted: 10/30/2007] [Indexed: 11/21/2022]
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Osterstock JB, Fosgate GT, Derr JN, Cohen ND, Roussel AJ. Assessing familial aggregation of paratuberculosis in beef cattle of unknown pedigree. Prev Vet Med 2008; 84:121-34. [DOI: 10.1016/j.prevetmed.2007.11.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2007] [Revised: 11/26/2007] [Accepted: 11/29/2007] [Indexed: 10/22/2022]
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Genetic resistance of mice to Mycobacterium paratuberculosis is influenced by Slc11a1 at the early but not at the late stage of infection. Infect Immun 2008; 76:2099-105. [PMID: 18285491 DOI: 10.1128/iai.01137-07] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
We have recently described the development of a luminescent Mycobacterium paratuberculosis strain of bovine origin expressing the luxAB genes of Vibrio harveyi. With this luminescent isolate, fastidious and costly enumeration of CFU by plating them on agar can be replaced by easy and rapid luminometry. Here, we have reevaluated the effect of Slc11a1 (formerly Nramp1) polymorphism on susceptibility to M. paratuberculosis, using this luminometric method. A series of inbred mouse strains were infected intravenously with luminescent M. paratuberculosis S-23 and monitored for bacterial replication in spleen, liver, and lungs for 12 weeks. The results indicate that, as for Mycobacterium avium subsp. avium, innate resistance to infection is genetically controlled by Slc11a1. In BALB/c, congenic BALB.B10-H2(b) (BALB/c background; H-2(b)), C57BL/6, and beige C57BL/6(bg/)(bg) mice (all Slc11a1(s)), bacterial numbers in spleen and liver remained unchanged during the first 4 weeks of infection, whereas in DBA/2 and congenic BALB/c.DBA/2 (C.D2) mice (both Slc11a1(r)) and in (C57BL/6 x DBA/2)F(1) mice (Slc11a1(s/r)), the bacterial numbers had decreased more than 10-fold at 4 weeks postinfection in both male and female mice. At later time points, additional differences in bacterial replication were observed between the susceptible mouse strains, particularly in the liver. Whereas bacterial numbers in the liver gradually decreased more than 100-fold in C57BL/6 mice between week 4 and week 12, bacterial numbers were stable in livers from BALB/c and beige C57BL/6(bg/)(bg) mice during this period. Mycobacterium-specific gamma interferon responses developed earlier and to a higher magnitude in C57BL/6 mice than in BALB/c mice and were lowest in resistant C.D2 mice.
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Survival of Mycobacterium avium subsp. paratuberculosis in bovine monocyte-derived macrophages is not affected by host infection status but depends on the infecting bacterial genotype. Vet Immunol Immunopathol 2007; 120:93-105. [PMID: 17825427 DOI: 10.1016/j.vetimm.2007.07.017] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2006] [Revised: 07/24/2007] [Accepted: 07/25/2007] [Indexed: 10/23/2022]
Abstract
In this study we investigated the ability of different Mycobacterium avium subsp. paratuberculosis (M. paratuberculosis) strains to survive in bovine monocyte-derived macrophages (MDMs) of cows naturally infected with M. paratuberculosis and control cows. We tested the hypotheses that infection status of cows affects macrophage killing ability and that survival of M. paratuberculosis in macrophages is dependent on the strain. Peripheral blood mononuclear cells (PBMC) were obtained from Johne's disease-positive (n=3) and age and stage of lactation matched Johne's disease-negative (n=3) multiparious cows. Following differentiation, MDMs were challenged in vitro with four M. paratuberculosis strains of different host specificity (cattle and sheep). Two hours and 2, 4, and 7 days after infection, ingestion, and intracellular survival of M. paratuberculosis strains were determined by fluorescence microscopy. There was no effect of the origin of MDMs (Johne's disease-positive or control animals) on phagocytosis, survival of bacteria, or macrophage survival. In contrast, important strain differences were observed. These findings suggest that some M. paratuberculosis strains interfere more successfully than others with the ability of macrophages to kill intracellular pathogens which may make it important to include strain typing when designing control programs.
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49
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Morris CA. A review of genetic resistance to disease in Bos taurus cattle. Vet J 2006; 174:481-91. [PMID: 17095270 DOI: 10.1016/j.tvjl.2006.09.006] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2006] [Revised: 09/14/2006] [Accepted: 09/20/2006] [Indexed: 10/23/2022]
Abstract
Cattle show considerable variability in their responses to a wide range of disease challenges, and much of the variability is genetic. This review highlights genetic variation in disease susceptibility in Bos taurus cattle, with variation found at the breed level and also within breeds. Disease challenges come from bacteria and viruses, parasites and feed-borne toxins. For an animal to survive, it needs its own mechanisms for resisting these challenges, or for being resilient to them, or it must be protected artificially from them. Disease challenges have been classified as 'diseases from without', but there is also another class of genetic diseases resulting from inborn errors of metabolism, which might be called 'diseases from within'. Degrees of inheritance (heritabilities) are reviewed for a range of economically important traits including resistance to mastitis, ketosis, lameness, nematode parasites, external parasites, eye disease, respiratory disorders, tuberculosis, brucellosis, Johne's disease, foot-and-mouth disease, bovine spongiform encephalopathy, metabolic disorders caused by toxins found on the feed, and threshold levels of minerals and metabolites. Many, but not all, of the above require an immune response as part of the fight against an external challenge, and measurements have been made of general immune response as a way of describing or predicting how an animal will respond. There are now some examples of industry or breed societies applying selection for resistance to one or more diseases as part of a complete breeding objective in dairy cattle, beef cattle or dual purpose livestock. In most cases, industry and breed societies are in the early stages of applying effective selection pressure for resistance to specific cattle diseases, with the notable exceptions of Scandinavian cattle schemes, which lead the world in this respect.
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Affiliation(s)
- C A Morris
- AgResearch, Ruakura Research Centre, PB 3123, Hamilton 2001, New Zealand.
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50
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Abstract
Efforts to explore a mycobacterial origin for Crohn's disease typically have involved an epidemiological approach, searching for Mycobacterium avium subsp. paratuberculosis in patient tissue. An alternative approach involves consideration of genetic and experimental data regarding host resistance to mycobacteria. From human and mycobacterial genetics, it is known that mycobacterial diseases depend on both pathogen and host factors and that tuberculosis and leprosy are effectively genetic diseases. The discovery of a number of Crohn's susceptibility genes, including NOD2/CARD15, demonstrates that Crohn's also is a complex genetic disease. Mutations in NOD2/CARD15 do not necessarily lead to Crohn's disease, so other mitigating factors, genetic and/or environmental, probably are required to produce illness. Recent work has shown that NOD2/CARD15 serves a role in bacterial sensing and activation of innate immune responses, providing a link between Crohn's genetics and an environmental factor, potentially a bacterial trigger. In this review, we discuss the current understanding of mycobacterial and Crohn's genetic susceptibility and review the evidence that NOD2/CARD15 may mediate host resistance to mycobacterial infection.
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Affiliation(s)
- Marcel A Behr
- Department of Medicine, McGill University Faculty of Medicine, Montreal, Quebec, Canada.
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