The effect of sex on immune responses to a homocitrullinated peptide in the DR4-transgenic mouse model of Rheumatoid Arthritis

Autor: Patrick Lac, Lillian Barra, Garth Blackler, David A. Bell, Sheri Saunders, Ewa Cairns
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Genetically modified mouse
lcsh:Immunologic diseases. Allergy
Research paper
medicine.medical_treatment
T cell
anti-CarP
anti-carbamylated protein antibodies
Immunology
RA
rheumatoid arthritis
Biology
Mouse model
03 medical and health sciences
0302 clinical medicine
Immune system
Antigen
Anti-citrullinated protein/peptide antibodies
HomoCitFib
homocitrullinated fibrinogen
Shared epitope
Medicine and Health Sciences
medicine
Splenocyte
Immunology and Allergy
sc
subcutaneous
Rheumatoid arthritis
030304 developmental biology
030203 arthritis & rheumatology
0303 health sciences
AHCPA
anti-homocitrullinated protein/peptide antibodies
Autoantibody
medicine.disease
Anti-homocitrullinated (carbamylated) protein/peptide antibodies
ACPA
anti-citrullinated protein/peptide antibodies
ConA
Concanavalin A
SI
stimulation index
Cytokine
medicine.anatomical_structure
Cytokines
Sex
RF
rheumatoid factor
lcsh:RC581-607
Zdroj: Journal of Translational Autoimmunity
Journal of Translational Autoimmunity, Vol 3, Iss, Pp 100053-(2020)
Bone and Joint Institute
ISSN: 2589-9090
Popis: Rheumatoid Arthritis (RA) is more common and severe in women compared to men. Both women and men with RA express autoantibodies to post-translationally modified antigens, including citrullinated and homocitrullinated proteins or peptides. These autoantibodies are strongly linked with the HLA-DR4 gene. The objective of this study was to determine sex differences in immune responses to homocitrullinated antigens. We used a humanized animal model of RA, DR4-transgenic mice and immunized them with a homocitrullinated peptide called HomoCitJED. Immune responses in these mice were measured for splenocyte proliferation by tritiated thymidine incorporation, serum autoantibody production by ELISA and cytokine levels by multiplex. We found that T cell and antibody responses to homocitrullinated antigens were similar in male and female mice. However, we found sex differences in serum cytokine profiles with female mice having higher ratio of IL-1α to IL-5, suggesting imbalances in immune regulation. This is the first study to report that immune responses to homocitrullinated antigens can be differentiated by sex.
Highlights • Splenocyte proliferation and antibody responses in DR4tg mice immunized with a homocitrullinated peptide were similar for females and males. • The cytokine profile of homocitrullinated peptide-immunized DR4tg mice was differentiated by sex: females had a higher ratio of IL-1α to IL-5. • Anti-homocitrullinated peptide splenocyte and antibody responses were more frequent in DR4tg than wild-type B6 mice.
Databáze: OpenAIRE
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