Systemic sclerosis & Raynaud's

Dermal cellular senescence and endothelial-to-mesenchymal transition (EndMT) in patients with systemic sclerosis undergoing cyclophosphamide or autologous haematopoietic stem cell transplantation (aHSCT) treatment

Rheumatology (Oxford)Published Secondary analysis of the ASTIS randomised trial

Authors' conclusion

Both aHSCT and iv CYC in dcSSc reduced skin thickening clinically and attenuated EndMT, but affected cellular senescence not significantly different.

Study context

Population
Diffuse cutaneous SSc (dcSSc) patients in the Autologous Stem Cell Transplantation International Scleroderma trial14 pairs of skin biopsies analysed
Comparison
aHSCT vs iv CYC pulse treatment
Methodological detailsskin biopsies before and 6 months after randomisation, histopathology
  • Skin biopsies before and 6 months after randomisation
  • Histopathology

Primary result

As reported in the abstract

Change in modified Rodnan skin score · 6 months

aHSCT

−14

median · IQR −16–-9

Iv CYC

−6

median · IQR −9–-4

P = 0.028

Further findings

Histology: uPAR on fibroblasts, P21 on vessels and EndMT · 6 months

Decreased after treatment in both groups, reduction more pronounced in aHSCT

Poor skin response by baseline markers

High baseline connective tissue growth factor (CTGF) on fibroblasts, OR
1.43
Low baseline P21 on vessels, OR
0.41

Poor skin response by rise in markers after treatment

Rise in CTGF on fibroblasts, OR
1.29
Rise in P21 on vessels, OR
3.02
P
P < 0.001

Original publication

Dermal cellular senescence and EndMT in patients with systemic sclerosis undergoing cyclophosphamide or aHSCT treatment. Rheumatology (Oxford). Published 4 December 2024. doi:10.1093/rheumatology/keae660

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