Response patterns of hairy cell leukemia to B-cell mitogens and growth factors

Response patterns of hairy cell leukemia to B-cell mitogens and growth factors.

The effect of mitogens and/or recombinant B-cell growth factors (M/GFs) on the in vitro growth of hairy cells was examined. Tumor cells were isolated from the spleens of four patients with hairy cell leukemia (HCL) by Ficoll-Hypaque sedimentation and E-rosetting. Enrichment for tumor cells was confirmed with intracytoplasmic immunoglobulin (Ig) staining, tartrate resistant acid phosphatase (TRA...

Production of B cell growth factor(s) by neoplastic B cells from hairy cell leukemia patients.

Recent studies have shown that normal human T cells contain a high-molecular-weight (mol wt) protein exhibiting B cell growth factor (BCGF) activity. Other studies have shown that virally transformed human B cells also secrete a high-mol-wt BCGF-like molecule in vitro. We have studied neoplastic B cells from patients with untreated hairy cell leukemia (HCL) to ascertain whether such cytoplasmic...

clinical and laboratory presentation of hairy cell leukemia (hcl) and rate of response to cladribine

introduction: hcl is a rare malignant condition that is curable if diagnosed early. hcl can present with reduced blood cells and splenomegaly which maybe misdiagnosed with other conditions. the aim of the present study was to determine the frequency of early clinical and laboratory findings as well as the response rate of patients to the standard treatment regimen of cladribine. methods: the st...

Hairy cell leukemia, an uncommon B-cell lymphoid neoplasia

Growth factor-mediated tumor cell proliferation in hairy cell leukemia

Leukemic B cells from seven patients with hairy cell leukemia (HCL), six of which contained the Tac antigen, were assayed in vitro for growth factor-mediated cell proliferation. The HCL cells showed typical phenotypic profiles by monoclonal antibody analysis. The tumor cells, which do not grow spontaneously in vitro, were found to proliferate in all but one case in response to partially purifie...