Transient neutropenia after intravenous injection of vindesine in patients with lung cancer.

Abstract:

:We have found transient circulating neutropenia and pulmonary sequestration of neutrophils after the intravenous injection of vindesine, a microtubule disruptor. Experiment 1 Ten patients with lung cancer were given a bolus intravenous injection of 3 mg.m-2 vindesine (Fildesine(r)). In all patients, total leukocyte and neutrophil counts in the venous blood fell to 65% and 47% of baseline values respectively within 30 min, and returned to baseline values within 6 h. In contrast, the lymphocyte count was stable. Experiment 2 Male Wistar rats were given saline or 0.08 mg.kg-1 vindesine intravenously and were sacrificed after 30 min. Vindesine produced a 58% reduction in the neutrophil count in the systemic circulation and a threefold increase in the neutrophil/erythrocyte ratio in the pulmonary microvasculature. Experiment 3 We studied the effects of vindesine in vitro on neutrophils and lymphocytes isolated from the venous blood of healthy volunteers. Vindesine (10(-5)-10(-8) mol.l-1) reduced neutrophil deformability (filterability) and induced neutrophil polarization, with reversibility of both effects after washout. These effects of vindesine were completely inhibited by cytochalasin B, an actin filament disrupter. Vindesine did not stimulate the neutrophil functions of adherence to polystyrene tubes, chemotaxis, or superoxide anion generation. The filterability and morphology of lymphocytes were not altered by vindesine. Thus, we conclude that a bolus injection of vindesine produces pulmonary sequestration of neutrophils, which produces circulatory neutropenia, and that it is primarily mediated by a decrease in neutrophil deformability that occurs without activation of the cells.

journal_name

Eur J Clin Pharmacol

authors

Aoshiba K,Nagai A,Ueno H,Konno K

doi

10.1007/BF00193474

subject

Has Abstract

pub_date

1994-01-01 00:00:00

pages

25-32

issue

1

eissn

0031-6970

issn

1432-1041

journal_volume

47

pub_type

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