Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0027947 (neutropenia)
 17,527 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Irinotecan hydrochloride (CPT-11) is a new derivative of camptothecin which inhibits topoisomerase I. Phase II studies have demonstrated that CPT-11 is active against a broad spectrum of neoplasms including intractable non-Hodgkin's lymphoma. An early phase II study in lymphoma suggested that a schedule of daily infusions of 40 mg/m2/day for three or five consecutive days is more effective than a single infusion of 200 mg/m2 every three to four weeks. Carboplatin is also an active agent against lymphoma, and preclinical studies have shown that CPT-11 and its active metabolite have a synergistic effect with platinum compounds. To evaluate the maximal tolerated dose (MTD) and the therapeutic efficacy of CPT-11 in combination with carboplatin in relapsed or refractory non-Hodgkin's lymphoma, we conducted a combination phase I/II study. The starting dose of CPT-11 was 20 mg/m2/day (days 1 through 3 and 8 through 10), and dose escalations of 5 mg/m2/day increments were planned, with a fixed dose of carboplatin (300 mg/m2, day 1). Six of the eight patients receiving both agents at the starting dose level developed critical toxicities such as grade 4 hematologic (neutropenia 6/8, thrombocytopenia 1/8) and grade 3 non-hematologic toxicities (diarrhea 2/8, transaminase elevation 1/8). Further dose escalation of CPT-11 was halted, and the starting doses were judged to be the MTDs. The response rate (25%, 2/8) to the combination of the MTDs was not superior to that of CPT-11 alone in a previous phase II study (38%, 26/69), and the MTD of CPT-11 in combination with carboplatin was less than half the single-agent dose. We conclude that carboplatin is not recommendable for combination with CPT-11 in lymphoma patients. Other suitable agents for such a combination should be sought.
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PMID:Combination phase I/II study of irinotecan hydrochloride (CPT-11) and carboplatin in relapsed or refractory non-Hodgkin's lymphoma. CPT-11/Lymphoma Study Group. 900 51

The aim of this phase I study was to determine the maximum tolerated dose of a 3-h infusion of paclitaxel, combined with carboplatin at a fixed AUC of 7 mg ml-1 min every 4 weeks for up to six cycles and to evaluate any possible pharmacokinetic interaction. Twelve chemonaive patients with ovarian cancer were treated with paclitaxel followed by a 30-min infusion of carboplatin. Paclitaxel dose was escalated from 150 mg m-2 to 225 mg m-2 in cohorts of three patients. Carboplatin dose was based on renal function. Pharmacokinetic studies were performed in nine patients (at least two at each dose level). A total of 66 courses were evaluable for assessment. Grade 3 or 4 neutropenia was seen in 70% of the courses, however hospitalization was not required. Grade 3 or 4 thrombocytopenia occurred in 24% of the courses. Alopecia, myalgia and peripheral neuropathy were common but rarely severe. The pharmacokinetics of paclitaxel was non-linear and did not appear to be influenced by co-administration of carboplatin. The AUC of carboplatin was 7.0 +/- 1.4 mg ml-1 min, indicating that there was no pharmacokinetic interaction. The combination of carboplatin and paclitaxel may be administered as first-line treatment for advanced ovarian cancer. Although myelosuppression is the dose-limiting toxicity of the component drugs, the severity of thrombocytopenia was less than anticipated. The results of this study, with only a small number of patients, need to be confirmed in future investigations.
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PMID:A clinical and pharmacokinetic study of the combination of carboplatin and paclitaxel for epithelial ovarian cancer. 901 40

Recently, a randomized study conducted by the Gynecologic Oncology Group (GOG 111) demonstrated that, given by a 24-hour infusion, the combination of cisplatin and paclitaxel (Taxol; Bristol-Myers Squibb Company, Princeton, NJ) is superior to combination cisplatin/cyclophosphamide in previously untreated patients with advanced ovarian cancer. This combination, however, necessitates hospitalization. Combination paclitaxel/carboplatin would be expected to induce fewer nonhematologic side effects but may be more myelotoxic. Thus, we started a phase I dose-escalation study to determine the maximal tolerated dose of paclitaxel given as a 3-hour infusion in combination with carboplatin, both drugs administered every 21 days. The paclitaxel dose was escalated by increments of 25 mg/m2, starting at 135 mg/m2 (level 1), 160 mg/m2 (level 2), 185 mg/m2 (level 3), and 210 mg/m2 (level 4). Carboplatin was administered to achieve an area under the concentration-time curve of 5, using the Calvert formula For study levels 5 and 6, the carboplatin dose was targeted at area under the concentration-time curves of 6 and 7.5, respectively, and was combined with a fixed paclitaxel dose of 185 mg/m2. Thirty previously untreated patients with stage IIC to IV ovarian cancer were enrolled. Nonhematologic toxicity, including nausea/vomiting and arthralgia/myalgia, was mild. Across all dose levels, a total of 16 patients developed peripheral neurotoxicity (World Health Organization grades 1 and 2). At dose level 5, one patient experienced reversible grade 4 neurotoxicity. Neutropenia was the principal dose-limiting hematologic toxicity. During 33 (31%) of 106 courses, World Health Organization grade 4 neutropenia was observed. Granulocyte colony-stimulating factor was required in only 7.6% of courses. Thrombocytopenia was less than that expected when carboplatin is given alone. Clinical responses were observed in eight of 14 patients, for an overall response rate of 57%. The combination of carboplatin plus paclitaxel was found to be an active regimen. This trial demonstrates that carboplatin dosed by the Calvert equation and 3-hour paclitaxel can be combined safely at full therapeutic doses for six or more courses in patients with advanced epithelial ovarian cancer.
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PMID:Paclitaxel combined with carboplatin in the first-line treatment of advanced ovarian cancer: a phase I trial. 904 30

The clinical pharmacology of carboplatin (C) administered with paclitaxel (Taxol; Bristol-Myers Squibb Company, Princeton, NJ) (P) was investigated in two phase I studies undertaken in 83 previously untreated patients with either non-small cell lung cancer or ovarian cancer. Carboplatin was administered over 30 minutes and paclitaxel over 3 hours. Both agents were given every 4 weeks. Non-small cell lung cancer patients were randomized to two administration sequences, either carboplatin followed by paclitaxel (C-->P) or the reverse (P-->C). Each patient received the alternate sequence during the second and subsequent courses. Ovarian cancer patients uniformly received paclitaxel before carboplatin. Platinum concentrations in plasma ultrafiltrate were measured via flameless atomic absorption spectrometry, and 122 concentration-time curves were obtained. For non-small cell lung cancer patients, the mean area under the concentration-time curve (AUC) per 300 mg/m2 carboplatin was 3.52 mg/mL x min (range, 1.94 to 5.83) for the sequence C-->P and 3.62 mg/mL x min (range, 1.91 to 5.01) for the sequence P-->C. No sequence-dependent effect was observed (P > .5). For ovarian cancer patients, the mean AUC per 300 mg/m2 carboplatin was 3.83 mg/mL x min (range, 2.72 to 6.10), showing no difference when compared with data derived from non-small cell lung cancer patients (P = .13). In addition, the carboplatin AUC was not influenced by increasing paclitaxel doses from 100 to 250 mg/m2. Neutropenia was the principal toxicity, and anemia was frequent. However, there was a striking lack of thrombocytopenia. Modeling of the relationship between the carboplatin AUC and the decrease in platelets revealed a 50% decrease in platelets at a carboplatin AUC (AUC50) of 6.3 mg/mL x min. This contrasts with historical data documenting a carboplatin AUC50 of 4.0 mg/mL x min. Our findings suggest that there is a considerable interaction of both drugs at the cellular level, with at least an additive effect of carboplatin on the main hematologic toxicity of paclitaxel (ie, neutropenia). There is also a protective effect exerted by paclitaxel on carboplatin-related toxicity (ie, thrombocytopenia). The clear protective effect of paclitaxel in this combination suggests that it is possible to reduce the dose interval to 3 weeks. Studies are in progress to test this hypothesis and to investigate the underlying pharmacologic interactions.
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PMID:Clinical pharmacology of carboplatin administered in combination with paclitaxel. 904 47

This phase I randomized study was designed in order to verify if the sequential administration of filgrastim, a granulocyte colony-stimulating factor (G-CSF), and molgramostim, a granulocyte-macrophage colony-stimulating factor (GM-CSF), was superior to filgrastim alone in improving tolerance of dose-intensified carboplatin (CBDCA), cyclophosphamide (CTX), and etoposide (VP-16). A group of 10 heavily pretreated patients with stage IV disease and no therapeutic option were enrolled into the study. They received two courses of the same chemotherapy with CTX and VP-16 at doses of 1,500 mg/m2 and 400 mg/m2, respectively. CBDCA doses were escalated from 450 to 600 mg/m2. After chemotherapy each patient was allocated randomly to receive either 14 days of G-CSF (arm A) or 7 days of G-CSF followed by 7 days of GM-CSF (arm B). Crossover in the second chemotherapy course was accomplished. Both G-CSF and GM-CSF were given 5 microg/kg/day, subcutaneously. Twenty chemotherapy courses are evaluable, 10 in each arm. Absolute neutrophil count < 1 x 10(3)/microl was observed for 54 days in arm A vs. 68 days in arm B (P < 0.02); platelet (PLT) count < 20 x 10(3)/microl, 57 days vs. 30 days (P < 0.01); days of hospitalization 35 vs. 16 (P < 0.38); PLT transfusion, 107 vs. 58 (P < 0.01); packed red blood cell unit transfusions, 15 vs. 5 (P < 0.13). Seven patients had responses. These data indicate that dose-intensified chemotherapy may be delivered without bone marrow or peripheral stem cell support, with acceptable toxicity, and that, while G-CSF alone shortens days of neutropenia, the combination of the two cytokines shortens the time of thrombocytopenia and decreases the number of PLT transfusions.
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PMID:Randomized trial of filgrastim vs. sequential filgrastim and molgramostim after dose-intensified carboplatin, cyclophosphamide, and etoposide: a phase I pilot study. 912 2

Carboplatin shares some of the therapeutic advantages of cisplatin, but without a significant incidence of the dose-limiting neurotoxicity and nephrotoxicity which is experienced with cisplatin. However, its use is associated with dose-limiting bone marrow suppression. Carboplatin is present in the blood as 3 distinct species. These are total platinum and 2 unbound species, carboplatin itself and a decarboxylated platinum-containing degradation product. The 2 main methods used to assay the unbound species are flameless atomic absorption spectrophotometry and high performance liquid chromatography. The first of these methods assays both unbound platinum species, the second is specific for carboplatin. Both unbound species have similar pharmacokinetic profiles for the first 12 hours post-dose. Carboplatin appears to have a linear pharmacokinetic profile over the doses used clinically and does not interact significantly with drugs that are used commonly in combination chemotherapy. The pharmacokinetics of carboplatin are adequately described by an open 2-compartment model with elimination from the central compartment. Its clearance is proportional to the glomerular filtration rate and the volume of distribution of the central compartment appears to correlate with extracellular fluid volume. The elimination half-life varies with renal function and is typically between 2 and 6 hours in patients with a normal glomerular filtration rate and may be as long as 18 hours in patients with impaired renal function. Relationships between systemic exposure to carboplatin, described as the area under the concentration-time curve (AUC), and both toxicity and response have been described. For toxicity the strongest evidence exists for a relationship between AUC and thrombocytopenia. To a lesser extent the relationship between AUC and neutropenia has also been described. Patients already treated with platinum analogues have been shown to develop a greater degree of myelosuppression from any given AUC. In addition, some evidence suggests a relationship between the shape of the concentration-time curve and myelotoxicity, where constant infusions appear less likely to cause myelosuppression on a mg/m2 dose administration basis. The relationship between AUC and response rate is not as clear, this may be related to the lack of studies describing both the dose and AUC of carboplatin. There appears to be a more clearly defined AUC-response relationship for ovarian cancer than for other malignancies, with an AUC of between 5 and 7 mg/ml.min being associated with the maximal response rate [located at the plateau on an AUC-response curve]. However, new data suggest that higher AUCs may lead to greater response rates. Data from testicular cancer also strongly supports an AUC-response relationship with an increased number of treatment failures with carboplatin AUCs < 5 to 6 mg/ml.min. Given the AUC-effect relationships described above a number of studies have been performed to develop models to describe the relationship between both dose and AUC and dose and platelet nadir. In adults, perhaps the most common method is that of Calvert which describes the relationship between dose and AUC. Paediatric formulas have also been described. More recently a number of limited sampling strategies have been proposed as well as Bayesian dose individualisation techniques.
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PMID:Clinical pharmacokinetics and dose optimisation of carboplatin. 931 10

Carboplatin/etoposide is an active regimen in the treatment of small cell lung cancer. This phase II trial evaluated whether adding paclitaxel (Taxol; Bristol-Myers Squibb Company, Princeton, NJ) to this two-drug combination might increase its efficacy. Since April 1996, 55 patients were entered into the ongoing protocol. To date, 35 patients are evaluable for efficacy and toxicity. Most of the evaluable patients are male (28). The patients' median age is 60 years (range, 36 to 74 years); 32 patients have Eastern Cooperative Oncology Group performance status ratings of 1, and the balance are Eastern Cooperative Oncology Group performance status 0. All patients had limited-stage disease. Patients received paclitaxel 175 mg/m2 via 1-hour intravenous infusion on day 1, carboplatin dosed to an area under the concentration-time curve of 5, also on day 1, and oral etoposide 100 mg on days 2 through 8. Overall, 31 patients responded to paclitaxel/carboplatin/etoposide therapy, including complete response in 13 patients (37.1%) and partial response in 18 patients (51.4%). Disease was stable in three patients (8.6%) and disease progressed in one (2.0%). Hematologic toxicity included neutropenia (World Health Organization grade 3 in 24.1% of patients, grade 4 in 31.3%), anemia (4% grade 3, no grade 4), and thrombocytopenia (3.2% grade 3, 2.1% grade 4). Nonhematologic adverse events included minor nausea/vomiting (1.5% grade 3, 9.2% grade 2), polyneuropathy (2.3% grade 2, 17.5% grade 1), and myalgia/arthralgia (8.2% grade 2, 16.4% grade 1). Paclitaxel/carboplatin/etoposide is active in small cell lung cancer with moderate toxicity and good subjective tolerance. There were no life-threatening hematologic or nonhematologic complications in this phase II trial.
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PMID:Paclitaxel, carboplatin, and oral etoposide: a phase II trial in limited-stage small cell lung cancer. 933 Nov 41

Fourteen dogs with histologically-confirmed transitional cell carcinoma (TCC) of the urinary bladder were treated with 300 mg/m2 carboplatin every 3 weeks. Response to therapy was assessed with abdominal radiography, double contrast cystography, urinary bladder ultrasonography and thoracic radiography before therapy and at 6-week intervals during therapy. Dogs were monitored for hematologic toxicity with a CBC and platelet count performed immediately before and 10 to 14 days after carboplatin treatment. Tumor responses included progressive disease in 11 dogs and stable disease in 1 dog. Two dogs were euthanized due to carboplatin toxicity before assessment of tumor response. Toxicity included thrombocytopenia with or without neutropenia in 7 dogs and gastrointestinal toxicity in 6 dogs. Carboplatin therapy was not beneficial in the treatment of TCC in the 14 dogs in this study.
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PMID:Phase II clinical trial of carboplatin in canine transitional cell carcinoma of the urinary bladder. 934 94

Five promising new drugs for gynecological cancer were reviewed. Taxans (Paclitaxel: Taxol and Docetaxel: Taxotere) diterpenoid plant products enhance the polymerization of tublin. Taxol showed significant activity for platinum refractory ovarian cancer in a phase 1 clinical trial in the United States. The combination with cisplatin (CDDP) showed superior results to CDDP plus Cyclophosphamide and has been recognized as a new standard in adjuvant chemotherapy for advanced ovarian cancer. The major toxicities are myelosuppression, alopecia, and hypersensitivity reactions (HSRs). HSRs were overcome by pretreatment with anti-histamines and over 24 hours administration. It was also reported that Taxol was administered safely by over 3 hours infusion with reduced myelotoxicity, but the incidence of HSRs may be increased. Clinical trials of intraperitoneal administration and combination with Carboplatin (CBDCA) are ongoing. Taxotere, an analog of Taxol, is also effective as Taxol with a low incidence of HSRs. Topoisomerase inhibitors (Irinotecan hydrochloride: CPT-11 and Topotecan) have promising antitumor activity for ovarian and cervical cancer. CPT-11 is a semisynthetic camptothesin analog developed in Japan. It was also effective for platinum-resistant ovarian cancer, such as mucinous and clear cell carcinoma. An adverse effect was observed in the combination of CPT-11 and CDDP. The phase 1 clinical trial showed a 40% response rate against recurrent ovarian cancer. CPT-11 50-60 mg/m2 (day 1,8,15) and CDDP 50-60 mg/m2 (day 1) are a recommended schedule. The major toxicities are neutropenia and diarrhea. Thrombocytopenia is not severe and diarrhea is also controllable. Topotecan is also a promising topoisomerase inhibitor and reported superior result to Taxol for platinum refractory ovarian cancer. A phase II trial is ongoing for ovarian and cervical cancer in Japan. Nedaplatin, a new analog of cisplatin, has similar activity especially for cervical cancer with less myelotoxicity and nephrotoxicity.
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PMID:[Promising new drugs for gynecological cancer]. 935 Feb 38

Surgery and radiation for advanced head and neck cancer are debilitating and associated with poor survival. If outpatient preoperative chemotherapy could be used such that smaller surgical resections are needed, organs might be preserved and patients' quality of life enhanced. Accordingly, we are conducting a phase I trial of paclitaxel (Taxol; Bristol-Myers Squibb Company, Princeton, NJ) and carboplatin in previously untreated patients with advanced head and neck cancer. Study goals include identifying the maximum tolerated paclitaxel dose, evaluating response, and enhancing organ preservation. Newly diagnosed patients with stage III/IV head and neck cancer, measurable disease, and Zubrod performance status < or =2 were eligible. Of 33 patients treated thus far, four (12%) had stage III and 29 (88%) stage IV disease. Their median age was 58 years (range, 17 to 76 years). Treatment was repeated at 21-day intervals for two courses. Patients who achieved clinical partial or complete responses (CRs) received a third course of treatment. If patients were found to have a histologic CR at restaging, radiation was substituted for surgery. Carboplatin was dosed by the Calvert formula to an area under the concentration-time curve of 7.5. Cohorts received escalating doses of paclitaxel (150 to 265 mg/m2) over 3 hours until dose-limiting toxicity was encountered. Five patients were treated at 150 mg/m2, three at 170 mg/m2, eight at 200 mg/m2, six at 230 mg/m2, four at 250 mg/m2, and seven at 265 mg/m2. At present, 26 patients are evaluable for primary tumor response. Thus far, we have seen seven CRs (27%) and seven partial responses (27%), for an overall response rate of 54%. Of 25 patients assessable pathologically, seven (28%) had a CR. Grade 3/4 toxicity at paclitaxel 265 mg/m2 included neurosensory toxicity in 17%, mucositis in 17%, neutropenia in 67%, and thrombocytopenia in 17%. We conclude that paclitaxel 230 mg/m2 and carboplatin area under the curve 7.5 can be administered safely to this patient population. The dose-limiting toxicity that occurred at paclitaxel 265 mg/m2 comprised grade 3/4 neutropenia and thrombocytopenia with associated cumulative grade 2 neuropathy. The maximum tolerated dose of paclitaxel with the combination will be between 230 and 265 mg/m2. This combination has activity in head and neck cancer.
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PMID:Paclitaxel and carboplatin in head and neck cancer. 942 61


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