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Biomedical subjects

R T Silver

Publications and source records attributed to R T Silver.

134 records · Page 8Linked to original sources
PubMedDate not supplied

Phase I/II trial of human recombinant granulocyte-colony-stimulating factor (filgrastim) and escalating doses of cyclophosphamide, mitoxantrone, and 5-FU in the treatment of advanced breast cancer.

PURPOSE: We performed a phase I/II dose-escalation trial of cyclophosphamide, mitoxantrone, and 5-fluorouracil (CNF) in combination with human recombinant granulocyte-colony-stimulating factor (G-CSF, filgrastim) in patients with advanced breast cancer. The objectives of this trial were (1) to gain experience with filgrastim given to patients with advanced breast cancer and receiving standard-dose CNF, and (2) to determine the maximum tolerated dose of CNF that could be given with filgrastim support by incremental dose escalation of two components of the CNF regimen, cyclophosphamide and mitoxantrone. METHODS: Four patients who had received prior therapy for advanced disease received standard-dose CNF with filgrastim support. Sequentially enrolled patients who had received no prior chemotherapy for advanced disease were treated with standard-dose CNF without filgrastim (5 patients), standard-dose CNF with filgrastim (15 patients), or were entered into sequential cohorts of 3-6 patients to be treated with increasing doses of CNF with filgrastim support (29 patients). RESULTS: The maximum tolerated doses that could be given with filgrastim support were 1500 mg/ml cyclophosphamide, 20 mg/m2 mitoxantrone, and 500 mg/m2 5-FU. Overall, 7 complete (14%) and 13 partial responses (26%) were observed. Despite the use of filgrastim, repeated cycles of CNF at doses of 2000 mg/m2 cyclophosphamide, 25 mg/m2 mitoxantrone, and 500 mg/m2 5-FU could not be given because of neutropenia and thrombopenia. Among 18 patients with bidimensionally measurable disease there were 3 complete (17%) and 5 partial (28%) responses. The median progression-free survival of all patients was 236 days (34 weeks). CONCLUSION: The use of filgrastim allows CNF to be given at approximately twice the dose intensity of "standard"-dose CNF. Because nonhematopoietic toxicity was not dose-limiting, further dose escalation of this regimen might be possible with more effective hematopoietic support. The response rate and survival of patients treated in this study were within the range expected with standard-dose chemotherapy.

Adult↗
PubMedDate not supplied

Case report: splenectomy in patients with Hodgkin's disease and marrow hypoplasia.

Two patients with Hodgkin's disease and hypoplastic bone marrow underwent splenectomy in an attempt to reverse pancytopenia and to improve chemotherapeutic tolerance. Although the peripheral blood counts were improved, the clinical course was not significantly affected. Infectious complications occurred. This suggests that the peripheral hematologic improvement following splenectomy may not reflect a true improvement in marrow tolerance.

Adult↗
PubMedDate not supplied

Mutiple myeloma resistant to melphalan (NSC-8806) treated with cyclophosphamide (NSC-26271), prednisone (NSC-10023), and chloroquine (NSC-187208).

A prospective randomized study of the effects of two different therapeutic regimens was conducted in 41 patients with multiple myeloma resistant to therapy with melphalan. The results of treatment with cyclophosphamide plus prednisone were compared with those of cyclophosphamide, prednisone, and chloroquine. Chloroquine, which inhibits the repair process of DNA in animals, has reportedly produced responses to alkylating agents to which the animal had been resistant. No significant differences in response to the doses used with either regimen could be found. Toxocity consisted mainly of leukopenia and thrombocytopenia.

Antineoplastic Agents↗
PubMedDate not supplied

Recombinant human erythropoietin therapy for anemic cancer patients receiving cisplatin chemotherapy.

PURPOSE: To assess whether the administration of recombinant human erythropoietin (r-HuEPO) would increase the hematocrit, reduce the requirement for transfusion, and improve the quality of life in anemic cancer patients receiving myelosuppressive, cisplatin-based chemotherapy. PATIENTS AND METHODS: One hundred thirty-two anemic cancer patients receiving cyclic, cisplatin-containing, myelosuppressive chemotherapy were evaluated. Patients received either r-HuEPO (150 U/kg) or placebo, subcutaneously, three times a week for 3 months. Responses were assessed by measuring changes in hemoglobin/hematocrit, transfusion requirement, and quality of life. RESULTS: The mean hematocrit increased by 6.0 percentage points in the r-HuEPO group versus 1.3 in the placebo group. A decrease in transfusion requirement did not reach significance over all 3 months, but there was a significant reduction in the percentage of patients transfused in the second and third months (27% r-HuEPO vs. 56% placebo) and a trend toward reduction in the mean total number of units transfused (1.20 units r-HuEPO vs. 2.02 units placebo), suggesting a lag of 1 month before r-HuEPO can affect the transfusion requirement. Pretreatment serum erythropoietin levels were lower in responders than in nonresponders (73.5 IU/L and 86.3 IU/L means, respectively). However, the magnitude of this difference was not helpful in defining which patients were likely to respond. There was a significant improvement in overall quality of life between the two treatment arms in favor of the r-HuEPO-treated group. There were no significant adverse effects associated with r-HuEPO. CONCLUSIONS: r-HuEPO is safe and can cause a significant improvement in the hematocrit and quality of life of anemic cancer patients receiving myelosuppressive, cisplatin-based chemotherapy. After 1 month of r-HuEPO, there is also a reduction in transfusion requirement.

Adolescent↗