Immune Biomarkers in Veterinary Research: Challenges and Promises

A special issue of Veterinary Sciences (ISSN 2306-7381). This special issue belongs to the section "Veterinary Microbiology, Parasitology and Immunology".

Deadline for manuscript submissions: closed (30 June 2022) | Viewed by 8489

Special Issue Editors


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Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, 26900 Lodi, Italy
Interests: immunology; veterinary infectious diseases; microbiology; innate immunity
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Department of Veterinary Sciences, University of Milan, Via dell'Università 6, 26900 Lodi, Italy
Interests: immunology; microbiology; innate immunity

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Guest Editor
Rete Nazionale di Immunologia Veterinaria (RNIV) , via Istria 3, 25125 Brescia, Italy
Interests: veterinary infectious diseases; veterinary immunology; inflammation

Special Issue Information

Dear Colleagues,

The term biological marker appeared for the first time in literature in the late 1960s, but its definition and more common use started by the 1990s, when biomarkers were defined as “a characteristic that can be consistently and objectively measured and evaluated as an indicator of normal biological processes, pathogenic processes, or pharmacologic responses to a therapeutic intervention”, and they may consist of nucleic acids, proteins, metabolites, and even images.

Biomarkers have since been extensively used in veterinary medicine to evaluate health status, risk, diagnosis, prognosis, and progression of disease, to predict and monitor response to therapy, and to measure organs toxicity or failure. Immune biomarkers may have a special role in the biomarkers discovery because immune system interacts with all other systems, making the finding of new immune biomarkers relevant in disease progression and prognosis for many diseases.

The great expansion of new available technologies (e.g., DNA and RNA microarrays, protein microarrays, next generation sequencing, and mass spectrometry) give us an almost immediate access to big data repositories (e.g., genes, proteins, and metabolites expression), and a more comprehensive insight into the mechanisms of disease, as well as diagnostic and prognostic applications. For these reasons, the number and type of recognized immune biomarkers described in the literature and available for both clinical and nonclinical use have increased remarkably; however, in this area, only the tip of the iceberg has yet been discovered, and a lot is still unknown.

We invite authors to submit original research papers that address specific developments in immune biomarkers in infectious disease and vaccines, cancer, immunodeficiency, allergy and asthma, autoimmunity, and others. Topics may include but are not limited to immune biomarkers (cellular, molecular, or biochemical) used to evaluate normal biological processes, abnormal processes, biological responses, and likely outcomes of such processes in companion, farm, laboratory, and wildlife animal species.

Emphasis is put on correlates of protection induced by veterinary vaccines, immunomodulators and biological response modifiers altogether. Studies liaising the possible use of such markers to the current 3Rs policies (replacement, reduction, refinement) in the field of animal experiments are also encouraged.

Biomarkers of exposure to environmental, non-infectious stressors are also within the aforementioned scope of the Special Issue, in the framework of major issues of animal health and welfare.

Dr. Joel Fernando Soares Filipe
Dr. Federica Riva
Dr. Massimo Amadori
Guest Editors

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Keywords

  • immune biomarkers
  • immunology
  • animal health and welfare
  • immune response

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Published Papers (2 papers)

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18 pages, 5128 KiB  
Article
Flow Cytometric Analysis of Leukocyte Populations in the Lung Tissue of Dromedary Camels
by Jamal Hussen, Turke Shawaf, Naser Abdallah Al Humam, Sameer M. Alhojaily, Mohammed Ali Al-Sukruwah, Faisal Almathen and Francesco Grandoni
Vet. Sci. 2022, 9(6), 287; https://doi.org/10.3390/vetsci9060287 - 10 Jun 2022
Cited by 2 | Viewed by 3376
Abstract
Respiratory tract infections are among the most common infections in dromedary camels, with a high impact on animal health, production, and welfare. Tissue-specific distribution of immune cells is one of the important factors that influence the nature and outcome of the immune response [...] Read more.
Respiratory tract infections are among the most common infections in dromedary camels, with a high impact on animal health, production, and welfare. Tissue-specific distribution of immune cells is one of the important factors that influence the nature and outcome of the immune response to pathogens. Several protocols have recently been described for the flow cytometric analysis of immune cells in the lung tissue of several species. However, no such protocol currently exists for dromedary camels. The aim of the present study was, therefore, to establish a flow cytometric protocol for the identification of immune cell populations in the camel lung tissue and the evaluation of some of their phenotypic and functional properties. Combined staining of camel lung leukocytes with monoclonal antibodies to the pan-leukocyte marker CD45 and the myeloid cell marker CD172a allowed the identification of myeloid cells (CD45+CD172a+) and lymphoid cells (CD45+CD172a) in the lung of healthy camels. The cell adhesion molecules CD11a and CD18 were found in a higher abundance on myeloid cells compared to lymphoid cells. Based on their differential expression of the LPS receptor CD14, macrophages (CD172a+CD14high cells) were identified as the most abundant immune cell population in the camel lung tissue. In contrast to their dominance in camel peripheral blood, granulocytes (CD172a+CD14low) presented only a minor population in the lung tissue. The higher frequency of γδ T cells in the lung tissue than in peripheral blood suggests a role for these cells in the pulmonary immune system. Flow cytometric analysis of bacterial phagocytosis and ROS production upon bacterial stimulation revealed high antimicrobial activity of camel lung phagocytes, which was comparable with the antimicrobial activity of blood granulocytes. Comparative analysis of immune cell distribution between the cranial and caudal lobes of the camel lung revealed a higher frequency of granulocytes and a lower frequency of macrophages in the cranial compared to the caudal lung lobe. In addition, the higher frequency of cells expressing the M2 macrophage marker CD163 in the caudal lung tissue, with a slightly higher fraction of MHCII-positive cells (M1 phenotype) in the cranial lung tissue, may suggest the distribution of different macrophage subtypes in the different lobes of the camel lung. Such differences between lung lobes could influence the effectiveness of the immune response to infection or vaccination with respiratory pathogens. Collectively, the present study identified some similarities and differences between camels and other farm animals regarding the distribution of the main immune cell populations in their lungs. Further studies are required for comprehensive immunophenotyping of the cellular pulmonary immune system in camels. Full article
(This article belongs to the Special Issue Immune Biomarkers in Veterinary Research: Challenges and Promises)
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13 pages, 2248 KiB  
Article
The Impact of Anticoagulation Agent on the Composition and Phenotype of Blood Leukocytes in Dromedary Camels
by Jamal Hussen, Turke Shawaf and Sameer M. Alhojaily
Vet. Sci. 2022, 9(2), 78; https://doi.org/10.3390/vetsci9020078 - 13 Feb 2022
Cited by 3 | Viewed by 3990
Abstract
For the analysis of several cellular biomarkers, blood samples are anticoagulated using different agents with different modes of action. However, for the most commonly used anticoagulants, EDTA and heparin, varying effects on blood components have been reported in different species. As little is [...] Read more.
For the analysis of several cellular biomarkers, blood samples are anticoagulated using different agents with different modes of action. However, for the most commonly used anticoagulants, EDTA and heparin, varying effects on blood components have been reported in different species. As little is known about the impact of anticoagulants on the immunological evaluation of camel leukocytes, the present study analyzed the leukogram, the immunophenotype, and the cell vitality of camel leukocytes separated from blood samples anticoagulated with EDTA or lithium heparin. Using flow cytometry and staining with monoclonal antibodies to several cell surface markers, the composition and immunophenotype of camel leukocytes separated from blood anticoagulated with EDTA or heparin were analyzed. In comparison to EDTA-anticoagulated blood, using lithium heparin as an anticoagulant resulted in reduced numbers of total leukocytes and reduced numbers of neutrophils, which led to a reduced neutrophil to lymphocyte ratio. The analysis of cell necrosis and apoptosis after the staining of leukocytes with the DNA-sensitive dye propidium iodide and the mitochondrial membrane potential probe JC1 revealed a higher fraction of necrotic neutrophils and higher fractions of apoptotic neutrophils and monocytes in heparin blood than in EDTA blood. In addition, monocytes from heparin blood showed higher expression levels of the cell surface markers CD14, CD163, and MHCII when compared to cells from EDTA blood. Similarly, in heparin blood, CD44 and CD172a were expressed higher on neutrophils, while CD11a was expressed higher on lymphocytes in comparison to cells from EDTA blood. The results of the current study indicate the importance of considering the type of anticoagulant when investigating the composition, vitality, and immunophenotype of camel leukocytes. Full article
(This article belongs to the Special Issue Immune Biomarkers in Veterinary Research: Challenges and Promises)
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