期刊
CANCER CHEMOTHERAPY AND PHARMACOLOGY
卷 71, 期 3, 页码 765-775出版社
SPRINGER
DOI: 10.1007/s00280-013-2070-8
关键词
Pancreatic neoplasm; Ascorbic acid; Clinical trial; Phase 1; Gemcitabine; Drug toxicity
资金
- Iowa Superfund Research Program Training Core [P42 ES013661]
- National Institutes of Health [GM42056, GM073929, P42ES013661, P30 CA086862, CA137230, CA148062]
- Medical Research Service of the Department of Veterans Affairs
- Holden Comprehensive Cancer Center
- Susan L. Bader Foundation of Hope
- Intramural Research Program NIDDK, NIH
Treatment for pancreatic cancer with pharmacological ascorbate (ascorbic acid, vitamin C) decreases tumor progression in preclinical models. A phase I clinical trial was performed to establish safety and tolerability of pharmacological ascorbate combined with gemcitabine in patients with biopsy-proven stage IV pancreatic adenocarcinoma. Nine subjects received twice-weekly intravenous ascorbate (15-125 g) employing Simon's accelerated titration design to achieve a targeted post-infusion plasma level of a parts per thousand yen350 mg/dL (a parts per thousand yen20 mM). Subjects received concurrent gemcitabine. Disease burden, weight, performance status, hematologic and metabolic laboratories, time to progression and overall survival were monitored. Mean plasma ascorbate trough levels were significantly higher than baseline (1.46 +/- A 0.02 vs. 0.78 +/- A 0.09 mg/dL, i.e., 83 vs. 44 mu M, p < 0.001). Adverse events attributable to the drug combination were rare and included diarrhea (n = 4) and dry mouth (n = 6). Dose-limiting criteria were not met for this study. Mean survival of subjects completing at least two cycles (8 weeks) of therapy was 13 +/- A 2 months. Data suggest pharmacologic ascorbate administered concurrently with gemcitabine is well tolerated. Initial data from this small sampling suggest some efficacy. Further studies powered to determine efficacy should be conducted.
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