1
|
Lins JGG, Albuquerque ACA, Louvandini H, Amarante AFT. Immunohistochemistry analyses of the abomasal mucosa show differences in cellular-mediated immune responses to Haemonchus contortus infection in resistant and susceptible young lambs. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2024; 161:105259. [PMID: 39216779 DOI: 10.1016/j.dci.2024.105259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 08/27/2024] [Accepted: 08/28/2024] [Indexed: 09/04/2024]
Abstract
Haemonchus contortus is known for its high pathogenicity in sheep, and the uncontrolled use of anthelmintics resulted in the emergence of multiple drug-resistant populations. Breeding sheep for gastrointestinal nematode resistance is a sustainable alternative to reduce dependence of anthelmintic drugs, and differences in the degree of resistance between breeds have been reported. Here we compare two sheep breeds (Santa Ines and Ile de France), concerning the differences in innate and adaptive immune response involved in the resistance against H. contortus infection. Immunohistochemical analyses of the abomasum were conducted in naïve Santa Ines (n = 14) and Ile de France (n = 12) lambs randomized into four groups: infected Santa Ines (n = 8), non-infected control Santa Ines (n = 6), infected Ile de France (n = 8), and non-infected control Ile de France (n = 4). The infected lambs were initially infected with H. contortus infective larvae at 14 days of age, and multiple infections were conducted every second day until they reached 66 days of age. There was a significant effect (P < 0.001) of the infection with increase in numbers of CD3+ T; CD79α+ B; GATA3+ Th2/ILC2; POU2F3+ tuft cells; FOXP3+ T reg; and IgE + cells in the fundus of the abomasal mucosa in both Santa Ines and Ile de France lambs. Nevertheless, the infected Santa Ines lambs presented the highest averages for CD79α+ B; GATA3+ Th2/ILC; IgE + cells; and POU2F3+ tuft cells and there was a significant association of the breed and infection status with regards to POU2F3+ tuft cells, with the highest mean in the infected Santa Ines group. The infected Santa Ines group had three lambs with high degree of resistance and five lambs that showed a moderate infection. Our results suggest a mechanism of synergistic coordination between different immune-cell types in promoting resistance of suckling lambs under H. contortus infection.
Collapse
Affiliation(s)
- José Gabriel Gonçalves Lins
- São Paulo State University (UNESP), School of Veterinary Medicine and Animal Science, Botucatu, SP, Brazil; São Paulo State University (UNESP), Department of Biodiversity and Biostatistics of the Bioscience Institute, Botucatu, SP, Brazil.
| | - Ana Cláudia A Albuquerque
- São Paulo State University (UNESP), Department of Biodiversity and Biostatistics of the Bioscience Institute, Botucatu, SP, Brazil
| | - Helder Louvandini
- Center for Nuclear Energy in Agriculture, University of São Paulo, Piracicaba, SP, Brazil
| | - Alessandro F T Amarante
- São Paulo State University (UNESP), Department of Biodiversity and Biostatistics of the Bioscience Institute, Botucatu, SP, Brazil
| |
Collapse
|
2
|
Lins JGG, Albuquerque ACAD, Almeida FAD, Britton C, Malossi C, Araújo-Júnior JPD, Louvandini H, Amarante AFT. Abomasal RNA-seq reveals a strong local cellular response in suckling lambs with resistance against Haemonchus contortus. Int J Parasitol 2023; 53:739-749. [PMID: 37673202 DOI: 10.1016/j.ijpara.2023.06.008] [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: 01/23/2023] [Revised: 05/22/2023] [Accepted: 06/06/2023] [Indexed: 09/08/2023]
Abstract
Santa Ines (SI) and Ile de France (IF) sheep are known to be resistant and susceptible to Haemonchus contortus infection, respectively. Several studies have shown some genes as potential biological markers for sheep resistance against gastrointestinal nematodes using molecular tools, including transcriptomic analysis. In this study, we sequenced the polyadenylated RNA of the abomasal tissue of SI and IF suckling lambs to identify mucosa-specific transcript alterations between breeds artificially infected with H. contortus. Naïve SI (n = 4) and IF (n = 4) lambs were artificially infected every other day, over a period of 52 days, from 14 to 66 days old, with a total of 5,400 H. contortus infective larvae. Fundic abomasal tissue samples were collected at 68 days old, and submitted to high-throughput RNA sequencing (RNA-seq). Differential expression analysis (P value < 0.001 and False Discovery Rate (FDR) < 0.05) between SI and IF samples identified 292 genes, most of which showed greater expression in SI lambs. To help annotate and assign possible function to differentially expressed genes (DEGs), we used previously available single-cell RNA-seq (scRNA-seq) data from ovine abomasal mucosa to putatively identify cell types and possible mechanisms involved in resistance to H. contortus. In particular, genes associated with endothelial and tuft cells showed the greatest increases in expression in SI relative to IF lambs. SI lambs had higher percentages of tuft cells than IF lambs in the fundic abomasal mucosa. Although we found innate immunity (cell-mediated in mucosa) acting as a protagonist in impairing H. contortus infection, a stronger acquired immune response was being modulated at an earlier stage by SI lambs. We suggest that the complex connection between innate and adaptive immunity is via cellular antigen processing and presentation (APP). Based on comparison with scRNA-seq data, SI lambs showed a robust APP mechanism characterized mainly by greater T cell APP, macrophage differentiation, and cytokine signalling. We identified potential mechanisms and markers to advance knowledge for selection of H. contortus resistance at a very early age, in SI as well as in other commercial sheep breeds.
Collapse
Affiliation(s)
- José Gabriel Gonçalves Lins
- São Paulo State University (UNESP), School of Veterinary Medicine and Animal Science, Botucatu, SP, Brazil; São Paulo State University (UNESP), Institute of Biosciences, Botucatu, SP, Brazil.
| | | | | | - Collette Britton
- Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Camila Malossi
- São Paulo State University (UNESP), Institute of Biosciences, Botucatu, SP, Brazil
| | | | - Helder Louvandini
- Center for Nuclear Energy in Agriculture, University of São Paulo, Piracicaba, SP, Brazil
| | | |
Collapse
|
3
|
Lins JGG, Almeida FA, Albuquerque ACA, Britton C, Amarante AF. Early-onset immune response to Haemonchus contortus infection in resistant Santa Ines suckling lambs compared with susceptible Ile de France. Vet Parasitol 2022; 307-308:109734. [DOI: 10.1016/j.vetpar.2022.109734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 05/24/2022] [Accepted: 05/25/2022] [Indexed: 10/18/2022]
|