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Updated: May 12, 2026
Determination of Vaccine Immunogenicity Using Bovine Monocyte-Derived Dendritic Cells
Published on: May 19, 2023
Immunohistochemical detection of dendritic cell markers in cattle
F Romero-Palomo1, M A Risalde, V Molina
1Departamento de Anatomía y Anatomía Patológica Comparadas, Edificio de Sanidad Animal, Campus de Rabanales, 14014, Córdoba, Spain.
Insights
This study maps dendritic cells (DCs) in bovine tissues using various markers. Findings clarify DC distribution, aiding future research on bovine immune responses and diseases.
Area of Science:
- Veterinary Immunology
- Cell Biology
Background:
- Dendritic cells (DCs) are crucial for immune regulation.
- Understanding DC distribution in bovine tissues is vital for disease research.
Purpose of the Study:
- To characterize the in vivo distribution of dendritic cells (DCs) in healthy bovine tissues.
- To evaluate the efficacy of various DC markers for immunolabeling.
Main Methods:
- Paraffin-embedded bovine tissues were analyzed using the avidin-biotin-peroxidase method.
- Several markers including MHCII, CD208, CD1b, CD205, CNA.42, and S100 protein were tested.
- Optimal fixation, dilution, and antigen retrieval methods were determined for each antibody.
Main Results:
- CD208+ cells were found in lymphoid organs and follicles. CD1b+ cells were primarily in the thymus and lymph node interfollicular areas.
- CD205+ cells were rare and mainly in nonlymphoid tissues. CNA.42+ and S100+ cells localized to lymphoid follicles.
- MHCII emerged as a highly sensitive marker for hematopoietic DCs.
Conclusions:
- This study provides a detailed map of DC distribution in bovine tissues.
- The findings enhance understanding of DC immunolabeling and support future studies in healthy and diseased animals.
Abstract:
Dendritic cells (DCs) are "professional" antigen-presenting cells with a critical role in the regulation of innate and adaptive immune responses and thus have been considered of great interest in the study of a variety of infectious diseases. The objective of this investigation was to characterize the in vivo distribution of DCs in bovine tissues by using potential DC markers to establish a basis for the study of DCs in diseased tissues. Markers evaluated included MHCII, CD208, CD1b, CD205, CNA.42, and S100 protein, the latter 2 being expressed by follicular dendritic cells whose origin and role are different from the rest of hematopoietic DCs. Paraffin wax-embedded tissues from 6 healthy Friesian calves were subjected to the avidin-biotin-peroxidase method, and the most appropriate fixatives, dilutions, and antigen retrieval pretreatments were studied for each of the primary antibodies. The most significant results included the localization of CD208-positive cells not only in the T zone of lymphoid organs but also within lymphoid follicles; CD1b-positive cells were mainly found in thymus and interfollicular areas of some lymph nodes; cells stained with anti-CD205 antibody were scarce, and their location was mainly in nonlymphoid tissues; and CNA.42- and S100 protein-positive cells localized in primary lymphoid follicles and light zones of germinal centers, although showing differences in the staining pattern. Furthermore, MHCII was established as one of the most sensitive markers for any DC of hematopoietic origin. These results increase our understanding of DC immunolabeling and will help in future DC studies of both healthy and diseased tissues.
