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National Cancer Institute®
Ultima Vez Modificado: 1 de octubre del 2002
UI - 1381218
AU - Glaspy JA; Souza L; Scates S; Narachi M; Blatt L; Ambersley J; Golde DW
TI - Treatment of hairy cell leukemia with granulocyte colony-stimulating factor and recombinant consensus interferon or recombinant interferon-alpha-2b.
SO - J Immunother 1992 Apr;11(3):198-208
AD - Department of Medicine, UCLA School of Medicine.
Patients with hairy cell leukemia and neutropenia (absolute neutrophil count less than 1.5 x 10(9)/L) were treated with recombinant granulocyte colony-stimulating factor (G-CSF) at doses of 3.6 and 7.2 micrograms/kg by daily subcutaneous injection, until normalization of neutrophil counts occurred. Patients then received either recombinant interferon-alpha-2b (r-IFN-alpha-2b) or a unique IFN, recombinant consensus IFN (rIFN-con-1), each given at doses of 10 micrograms/m2 subcutaneously three times a week, coupled with continued daily G-CSF therapy, for 3 months. After 3 months the G-CSF was discontinued; patients continued to take IFN for 1 year. All 10 patients responded to G-CSF with normalization of neutrophil counts within 2 weeks; the increase in neutrophil counts was greater in previously splenectomized patients. Four patients were treated with r-IFN-alpha-2b, and six were treated with rIFN-con-1. No patients developed recurrent neutropenia with the initiation of IFN therapy. Nine patients are evaluable for response to IFN. Five of six patients demonstrated hematologic improvement with rIFN-con-1, with two patients obtaining complete responses. All three patients receiving r-IFN-alpha-2b demonstrated hematologic improvement; one complete response was observed. Toxicities of both IFNs included influenza-like symptoms. We conclude that G-CSF can abrogate the myelosuppressive effects of IFN, and may be a useful adjunct to this therapy in neutropenic patients. We conclude that rIFN-con-1, the product of a synthetic gene, has activity in the treatment of hairy cell leukemia, and merits clinical investigation in other settings.
UI - 8096405
AU - Reiter Z; Tomson S; Ozes ON; Taylor MW
TI - Combination treatment of 2-chlorodeoxyadenosine and type I interferon on hairy cell leukemia-like cells: cytotoxic effect and MHC-unrestricted killer cell regulation.
SO - Blood 1993 Apr 1;81(7):1699-708
AD - Division of Morphological Sciences, Faculty of Medicine, Technion, Haifa, Israel.
Hairy cell leukemia (HCL) is a lymphoproliferative disorder of B lymphocytes. Interferons (IFNs), especially of the alpha (alpha) subtype, have shown a significant antitumor effect in HCL patients. However, the therapeutic effect of IFN-alpha is still rather limited. The purine analogue 2-chlorodeoxy-adenosine (2-CdA) was reported recently to be an effective agent in the treatment of HCL. In the present study, we find that the HCL cell lines HS-1 and HS-2 as well as Eskol and its IFN-resistant clone (IREs-4) are sensitive to the cytotoxic activity of 2-CdA. Combination treatment of IFN-Con1 and 2-CdA results in a synergistic effect at low doses but an additive inhibitory effect at higher concentrations. IREs-4 cells responded only to 2-CdA treatment. All the HCL cell lines are resistant to natural killer (NK) cell-mediated cytotoxicity (CMC) but are relatively sensitive to IFN-Con1-primed or interleukin-2 (IL-2)-primed NK-CMC activities. No inhibition in killing ability was measured when only the effector cells (NK) were treated with 2-CdA. Pretreatment of the HCL target cells with 2-CdA increases their susceptibility to NK-CMC. Pretreatment with IFN-Con1 can reduce the susceptibility of target cells to NK-CMC in HS-1, HS-2, and Eskol cells but not in the IFN-resistant clone IREs-4. 2-CdA abolished this IFN-induced protection against NK-CMC. Normal fibroblasts only responded to treatment with relatively high doses of 2-CdA, and only a moderate additive cell growth inhibitory effect was seen in combination of 2-CdA with IFN-Con1. Only high doses of 2-CdA increased the susceptibility of fibroblast culture to NK-CMC. Thus, combination of IFN-Con1 and 2-CdA results in an in vitro enhancement of the direct antiproliferative/cytotoxic activity of each treatment alone and increases the efficacy of the NK activity against the HCL cell lines.
UI - 3144411
AU - Flandrin G; Coiffier B
TI - [Perspectives for an epidemiological study of hairy cell leukemia]
SO - C R Acad Sci III 1988;307(3):105-7
AD - Laboratoire central d'Hematologie, Hopital Saint-Louis, Paris.
A strong male predominance (4/1) has been noticed in all series of hairy cell leukemia (HCL) and we wonder whether there could be a link between male predominance and occupation. From a series of 161 patients observed by two different groups, the repartition of profession suggest an aetiological link between HCL and occupational exposure, particularly radiation, benzene and other solvents, since it appears that the proportion of medical workers (6%), mechanic divers (22%), printers and painters (10%) and farmers (11%) represent a high proportion of patients. Aware of the relative rarity of the disease we suggested to set up a national registry of the cases of HCL, the precise incidence of which remains unknown, and to start a classical case-referent study.
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