Title
Species comparison: human and minipig PBMC reactivity under the influence of immunomodulating compounds in vitro
Language
English
Description (en)
Considering the similarities between swine and humans, it is a logical consequence to use swine as a translational model in research and drug development, including non-clinical safety. Here, we compared the reactivity of peripheral blood mononuclear cells (PBMCs) from humans and minipigs under the influence of different compounds in vitro. We conducted a flow cytometry-based proliferation assay that focused on the T-cell response to three different stimuli: concanavalin A (ConA), phytohemagglutinin-L (PHA-L), and staphylococcal Enterotoxin B (SEB). Furthermore, four approved immunosuppressive drugs-abatacept, belatacept, rapamycin, and tofacitinib-which are used for the treatment of rheumatoid arthritis or rejection in transplant recipients, were combined with the different stimuli. This allowed us to study the effect of suppressive drugs in comparison with the different stimuli in both species. We examined proliferating T cells (CD3+) and investigated the presence of TCR-αβ+ and TCR-γδ+ T cells. Differences in the response of T cells of the two species under these various conditions were evident. CD4+ T cells were more activated within humans, whereas CD8+ T cells were generally more abundant in swine. The effectiveness of the used humanized antibodies is most likely related to the conserved structure of CTLA-4 as abatacept induced a much stronger reduction in swine compared with belatacept. The reduction of proliferation of rapamycin and tofacitinib was highly dependent on the used stimuli. We further investigated the effect of the immunosuppressive compounds on antigen-specific restimulation of pigs immunized against porcine circovirus 2 (PCV2). Treatment with all four compounds resulted in a clear reduction of the proliferative response, with rapamycin showing the strongest effect. In conclusion, our findings indicate that the effectiveness of suppressive compounds is highly dependent on the stimuli used and must be carefully selected to ensure accurate results. The results highlight the importance of considering the response of T cells in different species when evaluating the potential of an immunomodulatory drug.
Keywords (en)
Humans; Swine; Animals; Swine, Miniature; Abatacept; Leukocytes, Mononuclear; CD8-Positive T-Lymphocytes; Immunosuppressive Agents; Sirolimus; Receptors, Antigen, T-Cell
DOI
10.3389/fimmu.2023.1327776
Author of the digital object
Clara P. S.  Pernold  (University of Veterinary Medicine Vienna)
Armin  Saalmüller  (University of Veterinary Medicine Vienna)
Kerstin H.  Mair  (University of Veterinary Medicine Vienna)
Michael W.  Schmitt  (Merck KGaA)
Sven  Jäckel  (Merck KGaA)
Marlies  Dolezal  (University of Veterinary Medicine Vienna)
Emil  Lagumdzic  (University of Veterinary Medicine Vienna)
Maria  Stadler  (University of Veterinary Medicine Vienna)
Format
application/pdf
Size
6.5 MB
Licence Selected
CC BY 4.0 International
Type of publication
Article
Name of Publication (en)
Frontiers in Immunology
Pages or Volume
15
Volume
14
Publisher
Frontiers Media Sa
Publication Date
2024
Content
Details
Object type
PDFDocument
Format
application/pdf
Created
06.06.2024 09:57:43
This object is in collection
Metadata
Veterinärmedizinische Universität Wien (Vetmeduni) | Veterinärplatz 1 | 1210 Wien - Österreich | T +43 1 25077-0 | Web: vetmeduni.ac.at