Summary
Uptake of vinblastine into human cerebrospinal fluid, intracerebral tumor and autopsy tissues was quantitated radiochemically after separating vinblastine from its metabolites by high pressure liquid chromatography. Only low concentrations of vinblastine were found in cerebrospinal fluid from a single patient. A second patient who received a tracer dose of radiolabelled vinblastine prior to surgical resection of an intracerebral tumor had slightly less radioactivity in tumor than in temporalis muscle, but more in tumor than in edematous brain surrounding the tumor. The radioactivity in tumor increased gradually and exceeded concurrent plasma radioactivity by 2 hr after drug administration. A third patient died 4 hr into a planned 24-hr infusion of radiolabeled vinblastine. Highest vinblastine concentrations were found in organs with high blood flow such as kidney and heart. Intermediate concentrations were found in liver and lung, and low concentrations were found in prostate, gastrointestinal tract, spleen, muscle, bladder, and hepatic and lymph node metastases. A fourth patient died one month after receiving radiolabeled vinblastine. Highest concentrations were in liver and next highest concentrations were in intracerebral tumor. Moderately high concentrations were found in pancreas, thyroid, lung, spleen, ovary, kidney, and kidney metastases. Lowest concentrations were found in omental metastases, heart, breast, and brain. Vinblastine concentration decreased with increasing distance into brain from the brain metastases. Thus, vinblastine was not selectively localized in tumors. The concentrations in tumor did not reflect the concentration in the organ in which the tumor was located. There was no indication that uptake into intracerebral tumor was impaired. Cerebrospinal fluid and brain concentrations of vinblastine did not give any indication of the concentration attainable in intracerebral tumor.
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Stewart, D.J., Lu, K., Benjamin, R.S. et al. Concentrations of vinblastine in human intracerebral tumor and other tissues. J Neuro-Oncol 1, 139–144 (1983). https://doi.org/10.1007/BF00182959
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DOI: https://doi.org/10.1007/BF00182959