Lupus & antiphospholipid syndrome

Circulating and renal fibrocytes are associated with interstitial fibrosis in lupus nephritis

Rheumatology (Oxford)Published Mechanistic study

Authors' conclusion

Fibrocytes were significantly increased in the blood and kidney tissue of patients with LN, especially those with interstitial fibrosis. Fibrocytes could be differentiated from blood cells, with an active contribution from RTECs.

Study context

Population
Patients with lupus nephritis (LN)
Comparison
Patients with LN vs healthy control
Outcome
Fibrocytes in blood and kidney
Methodological detailsflow cytometry and confocal imaging, in vitro LN sera-treated HK-2 cells
  • Flow cytometry and confocal imaging
  • In vitro LN sera-treated HK-2 cells

Main finding

As reported in the abstract

  • Circulating fibrocytes (colI+α-SMA+CD34+CD45+) present in peripheral blood; abundance especially high in LN patients with interstitial fibrosis vs healthy control
  • Renal fibrocytes (colI+α-SMA+CD45+) found in tubulointerstitium in LN; numbers significantly associated with chronicity indices incl. interstitial fibrosis and renal dysfunction
  • PBMC stimulation with supernatants from LN serum-treated HK-2 cells led to significant fibrocyte generation, abrogated by IL-6 neutralizing antibody

Original publication

Circulating and renal fibrocytes are associated with interstitial fibrosis in lupus nephritis. Rheumatology (Oxford). Published 15 June 2022. doi:10.1093/rheumatology/keac345

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