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Lomustine, etoposide, vindesine, and dexamethasone (CEVD) in Hodgkin's lymphoma refractory to cyclophosphamide, vincristine, procarbazine, and prednisone (COPP) and doxorubicin, bleomycin, vinblastine, and dacarbazine (ABVD): a multicenter trial of the German Hodgkin Study Group.

Thirty-two patients with advanced Hodgkin's lymphoma resistant to cyclophosphamide, vincristine, procarbazine, and prednisone (COPP) and doxorubicin, bleomycin, vinblastine, and dacarbazine (ABVD) were treated with a salvage chemotherapy regimen consisting of lomustine, etoposide, vindesine, and dexamethasone (CEVD). Twenty-seven patients were treated because of primary resistance to COPP/ABVD, and five patients were treated in early relapse (less than 12 months) after COPP/ABVD-induced complete remission. Fourteen patients (44%) achieved complete remission, and four patients achieved partial remission, with an overall response rate of 56%. Two partial responders achieved complete remission after additional radiotherapy. Four of five patients in early relapse after COPP/ABVD achieved complete remission. Consolidation radiotherapy was given for only one complete responder. Median duration of complete remission is greater than 10 months, and median survival is greater than 26 months. The treatment was well-tolerated. The main side effects were leukopenia, thrombocytopenia, mild nausea/vomiting, and cushingoid side effects. CEVD is a very active and well-tolerated salvage chemotherapy regimen in patients with Hodgkin's disease resistant to or relapsing after COPP and ABVD.

Adolescent

Eastern Cooperative Oncology Group phase II studies in advanced measurable colorectal cancer. I. Razoxane, Yoshi-864, piperazinedione, and lomustine.

During a 6-month interval, Eastern Cooperative Oncology Group randomized 127 patients who had received prior chemotherapy, and who had advanced measurable, surgically incurable colorectal cancer, to receive piperazinedione (PZD), Yoshi-864, or razoxane (ICRF-159). The observed response (and median survival) rates were: PZD, one of 35 patients (17 weeks); Yoshi-864, one of 34 (19 weeks), and ICRF-159, none of 38 (23 weeks). Among 107 evaluable patients, there were five episodes of life-threatening toxicity with PZD (one death) and four with ICRF-159 (two deaths). In the same protocol, 42 evaluable patients who had not received prior chemotherapy were randomized to be treated with lomustine (CCNU) or one of the three drugs in the "previously treated" trial. One CR (41 weeks) was seen with ICRF-159 and two PRs were seen with CCNU. Life-threatening toxicity occurred in three patients, two who received CCNU (one death) and one who received PZD. No survival advantage was seen. We do not encourage further phase II trials in colorectal cancer with the agents studied.

Antibiotics, Antineoplastic

Lomustine, vincristine, and procarbazine in the treatment of metastatic malignant melanoma.

Sixty-five previously untreated patients with metastatic malignant melanoma were treated with lomustine, vincristine, and procarbazine. Sixty-four patients were evaluable for response, with a response rate of 13%. Only one complete response was observed, in a patient with nodal disease only. Three partial responses were observed in patients with disease confined to soft tissue, and four partial responses were observed in patients with pulmonary metastases. Median survival for all patients was 22 weeks. We conclude that this regimen offers no improvement compared to other drug combinations.

Adult

Schedule-dependent potentiation of lomustine cytotoxicity by amphotericin B in mice.

The sensitivity of leukemia cells of AKR/J mice to subsequent lomustine [1-(2-chloroethyl)-3-cyclohexyl-1-nitrosourea (CCNU)] exposure was found to vary with time following the ip administration of a single dose or multiple doses of amphotericin B (AmB) (0.5 mg/mouse/dose). Following 1 dose of AmB, leukemia cell sensitivity to CCNU, as measured by a spleen colony assay, reached a maximum by 24 hours with a tenfold increase in cell killing noted over cell killing with CCNU alone (0.15 mg/mouse). Two pretreatments with AmB separated by 24 hours led to a hundredfold increase in cell killing, whereas 4 pretreatments, each separated by 24 hours, gave more than a thousandfold increase in cytotoxicity by 8 hours, gave more than a thousandfold increase in cytotoxicity by 8 hours. Increasing the AmB dose, given as a single injection 24 hours before CCNU, resulted in increased potentiation of CCNU cytotoxicity, which reached a maximum at 0.5 mg/mouse. The kinetics of cell killing following either CCNU alone or the combination of AmB and CCNU were similar, although the extent of cell killing was greater with the combination. The AmB plasma pharmacokinetics for single doses showed a dose-dependent serum peak level and a half-life of about 24 hours for doses up to 1 mg/mouse. Nonlinearity was noted at the dose level of 2 mg/mouse because of saturation of absorption from the peritoneal cavity. These data are of importance for the optimal sequencing and dosing of these drugs for future clinical trials.

Amphotericin B

Third-line chemotherapy for resistant Hodgkin's disease with lomustine, etoposide, and methotrexate.

Thirty-two patients with recurrent Hodgkin's disease have been treated with an oral regimen employing lomustine (CCNU, 100 mg/m2 orally on Day 1); etoposide (VP-16, 100 mg/m2 orally on Days 1-3 and 21-23); and methotrexate (30 mg/m2 orally on Days 1, 8, 21, and 28). The regimen was repeated every 6 weeks. Most patients had been treated with MOPP (mechlorethamine, vincristine, procarbazine, and prednisone) and ABVD (doxorubicin, bleomycin, vinblastine, and dacarbazine); 20 had had prior irradiation. Lymph node was the predominant site of disease and the majority of patients had B symptoms. Four patients achieved complete response (13%), with a median duration of 33+ months, and 11 achieved partial response (34%), with a median duration of 5 months, for an overall response rate of 47%. The major toxic effect was severe myelosuppression, which occurred in six patients; there were no treatment-related deaths. This oral regimen was easy to administer in heavily pretreated patients with poor venous access and had minimal toxicity.

Administration, Oral

Metastatic malignant melanoma treated with procarbazine, vincristine and lomustine (POC).

Fourteen consecutive melanoma patients with evaluable metastatic disease were treated with combination chemotherapy including procarbazine, vincristine and lomustine (POC). All but two patients had been previously treated with single agent chemotherapy (dacarbazine 11 patients, melphalan plus hyperthermia 1 patient). One transient partial response and 4 stable disease were noted. Median overall survival was 5 months. In our experience POC seems unlikely to improve the response rate compared with other chemotherapy combinations. Patient characteristics can partially explain the contrasting results reported in the literature.

Adult

Enhancement of the antitumor efficacy of lomustine by the radiosensitizer RSU 1069.

Previous investigations have shown that combining the radiation sensitizer misonidazole with conventional alkylating chemotherapeutic agents can lead to a therapeutic advantage. More recently, another sensitizer, RSU 1069, has been reported to give an enhancement of antitumor agent efficacy similar to that observed with misonidazole, but at an approximately tenfold lower sensitizer dose. One chemotherapeutic agent whose activity has been modified by sensitizers to a greater extent in tumors than in critical normal tissues is the nitrosourea lomustine (CCNU). The present studies evaluated the therapeutic benefit of combining RSU 1069 and CCNU in KHT sarcoma-bearing C3H/HeJ mice. The drugs were administered ip, and tumor response was assessed by measuring the survival of clonogenic KHT cells 22-24 hours after treatment. Normal tissue toxicity was determined using peripheral wbc counts 3 days after treatment and a 30-day lethality assay. Combining CCNU with a 0.38-mmol/kg dose of RSU 1069 increased tumor cell killing by a factor of approximately 1.9. Wbc toxicity and 30-day animal lethality increased with CCNU dose, but the addition of RSU 1069 enhanced either endpoint only slightly (factor of 1.0-1.2). The addition of RSU 1069 to CCNU treatment, therefore, led to a significant therapeutic benefit.

Animals

Chemotherapy for bronchogenic carcinoma. Methotrexate, doxorubicin, cyclophosphamide, and lomustine.

A combination chemotherapy (MACC) consisting of methotrexate, doxorubicin hydrochloride (Adriamycin), cyclophosphamide, and lomustine (CCNU) was given to 41 patients with stage III bronchogenic carcinoma, 34 of whom had disseminated disease. The objective response rate was 46% for all patients with a median actuarial survival of nine months. Response was seen in all cell types, including four of ten patients with squamous cell carcinoma, six of 17 with adenocarcinoma, and six of seven with small-cell anaplastic carcinoma. Prolongation of survival was apparent for patients of all cell types. Toxic reactions were moderate and allowed for easy outpatient use.

Adenocarcinoma

Results of the treatment of children with recurrent gliomas with lomustine and vincristine.

Gliomas comprise over 50% of all childhood brain tumors. Treatment of recurrent childhood gliomas has been disappointing and the effectiveness of therapy has been difficult to judge because of the variable natural history of the disease. Information gathered recently has suggested that treatment with [1-(2-chloroethyl)-3-cyclohexyl-1-nitrosourea)] (CCNU) and vincristine (VCR) after radiotherapy is effective in prolonging survival in children with newly diagnosed anaplastic gliomas. The authors have used these same drugs--CCNU (100 mg/m2) and VCR (1.5 mg/m2 up to a maximum dose of 2 mg)--in 6-week cycles for a maximum of eight cycles in children with recurrent gliomas. To date, 15 patients have been treated; five patients had malignant gliomas and ten low-grade gliomas. Three children showed improvement, five had stable disease, and seven had progressive disease. Of the five patients with malignant gliomas, four progressed within two cycles of treatment and one had stable disease for 7 months on treatment and then relapsed. Seven of ten children with low-grade gliomas benefitted from treatment and six remain in continuous remission a median of 16 months after initiation of therapy. Three of these children are off all therapy 21, 30, and 30 months after treatment, respectively. Therapy was well tolerated and toxicity consisted primarily of reversible bone marrow suppression. The authors conclude that CCNU and VCR chemotherapy is effective in children with recurrent low-grade gliomas and can result in relatively long-term disease stabilization. In limited experience of the authors, it is not of benefit in children with recurrent anaplastic lesions.

Adolescent

[Efficacy of lomustine, teniposide, doxorubicin, bleomycin and prednisone (LTABP) or adriamycin, bleomycin, vinblastine and dacarbazine (ABVD) in the treatment of malignant lymphogranulomatosis resistant to MOPP].

LTABP regimen was applied to 18 patients in IIB and IV stage of malignant lymphogranulomatosis resistant to MOPP. The obtained results were compared with historical control group of 18 patients with similar stage of the disease treated according to ABVD regimen. In both regimens courses were repeated every 28 days or more rarely, when leucopenia and thrombocytopenia prolonged. Only patients who had received at least 3 courses were analysed. In the LTABP group the complete remission was obtained in 10 cases (55%) while partial remission in 6 (33%). In the group treated with ABVD complete remission was obtained in 4 cases (22%) and partial in 9 cases (50%). In the LTABP group 11 patients are still alive and remain in complete remission, while in ABVD group--4 patients. The most frequent side effects in both groups included leucopenia, thrombocytopenia and symptoms of gastrointestinal intolerance. The LTABP regiment allows to obtain higher percentage of the complete remission than ABVD.

Adolescent

[The influence of CCNU (lomustine) on the neurosecretion of hypothalamic nuclei and the neurohypophysis during early stages of extrauterine development of the rat].

The hypothalamo-neurohypophyseal neurosecretory system was investigated in 8-, 15- and 30-day-old rats subjected to three intragastric doses of CCNU - 12.5 mg/kg b. wt. each on the 3rd, 5th and 7th day after birth. Neurosecretory neurons in the hypothalamus were visualized in the paraffin sections by the immunoenzyme (PAP) technique using antibodies against neurophysin and by Gomori chrome-hematoxylin staining. Accumulation of neurophysin was observed in these cells after treatment with CCNU. Karyometric measurements showed an increase of the mean nuclear cross-section area in PVN neurons in 8-day-old rats exposed to CCNU. In four experimental rats disseminated intracerebral hemorrhagic foci were present. Plasma osmolality was far below the normal values on the 8th day, on the 15th day of life it shifted to hyperosmolality and returned to normal at the age of 30 days. Discussion of the results leads to the conclusion that the increase of the neurosecretory function observed in this experiment was secondary to vasogenic changes.

Animals