Vasculitis & polymyalgia rheumatica
Cytotoxic CX3CR1+ T cells drive vascular inflammation in giant cell arteritis but not in Takayasu's arteritis
Authors' conclusion
Differences in immune mechanisms between GCA and TAK highlight cytotoxic CX3CR1+ T cells as potential drivers for GCA-related inflammation and vessel damage but not for TAK.
Study context
- Population
- Treatment-naive patients with active large vessel vasculitis (giant cell arteritis (GCA) and TAK) and healthy controls30 patients with LVV
- Participants
- 22 / 8 / 16
- Comparison
- GCA vs TAK vs healthy controls
- GCAn = 22
- TAKn = 8
- Healthy controls (HC)n = 16reference
- Outcome
- Proportions of CX3CR1+ CD4+ and CD8+ T cells in whole blood
Methodological detailslongitudinal assessment after GC treatment, immunohistochemical staining
- Longitudinal assessment after GC treatment
- Immunohistochemical staining
Main finding
As reported in the abstract
Proportions of CX3CR1+ CD4+ and CD8+ T cells in blood
- CX3CR1+ CD4+ T cells significantly higher in GCA than in HC but not in TAK
- No differences in CX3CR1+ CD8+ T cells among GCA, TAK and HC
- Increased CX3CR1+ CD4+ T cells in GCA strongly correlated with severity of systemic inflammation; no significant correlation in TAK
- CX3CR1+ CD4+ T cells from GCA showed significantly higher granzyme B and perforin expression than TAK
- Inflamed temporal arteries in GCA infiltrated by numerous CX3CR1+ T cells; no infiltration in TAK aortitis lesions
Further findings
CX3CR1+ T cells after GC treatment (longitudinal)
- Reduction in CX3CR1+ T cells in GCA; no significant change in TAK
Original publication
Cytotoxic CX3CR1+ T cells drive vascular inflammation in giant cell arteritis but not in Takayasu's arteritis. Clin Exp Rheumatol. Published 22 March 2024. doi:10.
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