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An Adoptive Transfer Model of Rheumatoid Arthritis in Mice
Published on: June 6, 2025
Pharmacogenetics of rheumatoid arthritis: Potential targets from susceptibility genes and present therapies
Darren D O'Rielly1, Proton Rahman
1Faculty of Medicine, Memorial University of Newfoundland, St. John's, Newfoundland, Canada.
Abstract:
Rheumatoid arthritis (RA) is a chronic heterogeneous autoimmune disorder of unknown etiology resulting in inflammation in the synovium, cartilage, and bone. Genetic factors play an important role in susceptibility to RA as the heritability of RA is between 50% and 60%, with the human leukocyte antigen (HLA) locus accounting for at least 30% of overall genetic risk. Outside the major histocompatibility complex (MHC) region, six additional risk loci have been identified and validated including PTPN22, STAT4, PADI4, CTLA4, TNFAIP3-OLIG3, and TRAF1/C5. Genetic factors are also important in RA pharmacotherapy due to the gene-dependent activity of enzymes involved in the pharmacokinetics and/or pharmacodynamics of RA medications. Indeed, there is great variability in drug efficacy as well as adverse events associated with any anti-rheumatic therapy and genetics is thought to contribute significantly to this inter-individual variability in response. This review will summarize the genetic factors that have been implicated in the pathogenesis of RA, and how these determinants may factor into the potential pharmacogenetics of this disease. We will also review the therapeutic agents that are currently being utilized or presently being evaluated in the treatment of RA, along with potential pharmacogenetic markers that have been proposed for such medications.
Insights
Genetic factors significantly influence rheumatoid arthritis (RA) susceptibility and treatment response. Understanding these genetic markers can personalize anti-rheumatic therapies for better efficacy and fewer adverse events.
Area of Science:
- Immunogenetics
- Rheumatology
- Pharmacogenetics
Background:
- Rheumatoid arthritis (RA) is a complex autoimmune disease characterized by joint inflammation.
- Heritability estimates for RA range from 50% to 60%, with the human leukocyte antigen (HLA) locus being a major contributor.
- Several non-HLA genetic loci, including PTPN22 and STAT4, are also associated with RA risk.
Purpose of the Study:
- To review genetic factors involved in rheumatoid arthritis pathogenesis.
- To explore the role of genetics in the pharmacotherapy of RA.
- To identify potential pharmacogenetic markers for RA medications.
Main Methods:
- Literature review of genetic associations with RA.
- Analysis of genetic contributions to RA drug efficacy and adverse events.
- Examination of pharmacogenetic markers for current and emerging RA treatments.
Main Results:
- Genetic factors, including HLA and non-HLA loci, significantly contribute to RA susceptibility.
- Inter-individual variability in RA drug response and adverse events is influenced by genetic factors.
- Specific genetic markers are being investigated for their potential in guiding RA pharmacotherapy.
Conclusions:
- Genetics plays a crucial role in both the development and treatment of rheumatoid arthritis.
- Pharmacogenetics offers a promising avenue for personalized medicine in RA management.
- Further research into genetic markers can optimize anti-rheumatic drug selection and improve patient outcomes.
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