Lupus & antiphospholipid syndrome

PD-1/PD-L1 governed cross-talk of exhausted CD8+ T and memory B cells in systemic lupus erythematosus

RMD OpenPublished Mechanistic study

Authors' conclusion

The PD-1/PD-L1 signalling pathway, which governs the crosstalk between exhausted CD8+ T cells and activated memory B cells, is a mechanistic explanation for insufficient interferon-γ response in patients with SLE.

Study context

Population
Outpatients with systemic lupus erythematosus (SLE) or other rheumatic musculoskeletal diseases (RMDs), 2020–2023, and healthy donors
Participants
104 / 225 / 20
Comparison
SLE vs other RMDs vs healthy donors (indeterminate QFT rate); SLE with indeterminate vs negative QFT
  • SLEn = 104
  • RMDn = 225reference
  • Healthy donorsn = 20
Outcome
Rate of indeterminate QFT results

Main finding

As reported in the abstract

Indeterminate QFT results

Further findings

Active nephritis in SLE, indeterminate vs negative QFT

Mean

OutcomeSLE indeterminate QFTSLE negative QFTP value
Disease activity (SLEDAI-2K) in SLE, indeterminate vs negative QFT10.944.02P < 0.0001

Original publication

PD-1/PD-L1 governed cross-talk of exhausted CD8+ T and memory B cells in systemic lupus erythematosus. RMD Open. Published 17 January 2024. doi:10.1136/rmdopen-2023-003503

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