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Research ArticleArticle

INHIBITION OF PINOCYTOSIS BY NICOTINE

SORELL L. SCHWARTZ, DELBERT E. EVANS, JANE E. LUNDIN and JAMES C. BOND
Journal of Pharmacology and Experimental Therapeutics November 1972, 183 (2) 370-377;
SORELL L. SCHWARTZ
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DELBERT E. EVANS
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JANE E. LUNDIN
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JAMES C. BOND
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Abstract

The pinocytosis of invertase by sucrose-laden cultured mouse peritoneal macrophages was used as a model to study the effects of nicotine on pinocytosis. Sucrose-laden macrophages attached to glass coverslips were exposed to media containing invertase or invertase plus nicotine for 30 minutes. Cultures were then returned to control media to allow for the intravacuolar hydrolytic activity of pinocytosed invertase. The activity of invertase, which is indicated by the disappearance of sucrose vacuoles, was partially inhibited by nicotine tartrate at concentrations of 13.2 and 6.60 mM, but not at a concentration of 1.32 mM. Similar results were obtained with nicotine alkaloid but not with sodium tartrate. The apparent interference of the interaction of invertase with intracellular sucrose was confirmed by radiometric means in cells containing sucrose-24C. Tetramethylammonium and hexamethonium ions also interfered with the invertase effect. Nicotine did not inhibit the activity of invertase in vitro. It is concluded that nicotine blocked the pinocytosis of the enzyme.

Footnotes

    • Received March 9, 1972.
    • Accepted June 16, 1972.
  • © 1972 by The Williams & Wilkins Co.

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Journal of Pharmacology and Experimental Therapeutics
Vol. 183, Issue 2
1 Nov 1972
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Research ArticleArticle

INHIBITION OF PINOCYTOSIS BY NICOTINE

SORELL L. SCHWARTZ, DELBERT E. EVANS, JANE E. LUNDIN and JAMES C. BOND
Journal of Pharmacology and Experimental Therapeutics November 1, 1972, 183 (2) 370-377;

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Research ArticleArticle

INHIBITION OF PINOCYTOSIS BY NICOTINE

SORELL L. SCHWARTZ, DELBERT E. EVANS, JANE E. LUNDIN and JAMES C. BOND
Journal of Pharmacology and Experimental Therapeutics November 1, 1972, 183 (2) 370-377;
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