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Large granular lymphocytes (LGL) following non-myeloablative allogeneic bone marrow transplantation: a case report
M Mohty1, C Faucher, B Gaugler
1Laboratoire d'Immunologie des Tumeurs, Institut Paoli-Calmettes, Université de la Méditerranée, Marseille, France.
Abstract:
We report here the first case of large granular lymphocytes (LGL) expansion following non-myeloablative allo-BMT for chronic myeloid leukemia. We characterized the morphologic, phenotypic and functional features of the LGL subset amplified in vivo 14 months after allo-BMT. Our results indicate that LGL can mediate in vitro a cytolytic activity on tumor cells. In vivo, the timing of the LGL expansion was associated with a sustained complete molecular remission. These observations suggest that LGL are a subset with the properties of effector lymphocytes which may contribute to the graft-versus-tumor effect.

