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IMMUNOBIOLOGY
From the Institut de Recherche sur la Peau, Institut
National de la Santé et de la Recherche Médicale (INSERM)
U532, Hôpital Saint-Louis, Paris, France; Institut Pasteur,
Unité de Biologie Moléculaire du Gène, INSERM U277,
Département d'Immunologie, Paris; Unité de therapie
cellulaire et de clinique transfusionelle, Hôpital Saint-Louis,
Paris, France.
Sézary syndrome is a leukemic form of epidermotropic
cutaneous T-cell lymphoma related to the malignant proliferation of clonal CD4+ T cells. Extracorporeal photochemotherapy may
induce a transient improvement of the clinical signs, but its
efficiency is discussed. To investigate the frequency of the T-cell
clone in the peripheral blood of patients with Sézary syndrome
and to monitor its evolution in patients treated using extracorporeal
photopheresis or chemotherapy, we used the immunoscope technique. In
one patient, we observed a decrease of the relative frequency of the
clone from 15.6% to 0%, paralleling a complete remission of the
clinical disease and a disappearance of the circulating Sézary
cells. In the other cases, the evolution of the relative frequency
paralleled the initial improvement of the clinical status and the
absence of long-term efficiency in patients treated with extracorporeal
photopheresis or chemotherapy. We observed a quick-acting direct
cytotoxicity of the association 8MOP + UVA on the T-cell clone.
The immunoscope technique appears to be an efficient tool to appreciate
the amount of tumoral cells and to monitor the evolution of the clonal
component in the Sézary syndrome. This article has been cited by other articles:
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| Copyright © 2002 by American Society of Hematology Online ISSN: 1528-0020 | |||||||||