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Inhibitory Effect of Furosemide on Carbonic Anhydrase

Jing Cui, Tianqi Zhao, Yanan Jiang, Huiping Zhou

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Abstract

This study investigated the inhibitory effect of a high efficiency diuretic, furosemide, on carbonic anhydrase (CA). First, comparing the inhibitory effect of acetazolamide, a low efficiency diuretic, on CA, shows that furosemide or acetazolamide can quickly make CA inactive when its concentration is close to the enzyme concentration, different from the usual inhibitory kinetics in which the concentration of the inhibitor is far higher than the enzyme concentration. Secondly, the reaction of the enzyme indicates that the inhibitory effect of furosemide or acetazolamide on carbonic anhydrase is quickly reversible. Finally, the degree of the inhibitory effect of furosemide and of acetazolamide on CA are compared. The results show that furosemide inhibits CA less than acetazolamide.

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What this paper is about

This study investigated the inhibitory effect of a high efficiency diuretic, furosemide, on carbonic anhydrase (CA). First, comparing the inhibitory effect of acetazolamide, a low efficiency diuretic, on CA, shows that furosemide or acetazolamide can quickly make CA inactive when its concentration is close to the enzyme concentration, different from the usual inhibitory kinetics in which the concentration of the inhibitor is far higher than the enzyme concentration. Secondly, the reaction of the enzyme indicates that the inhibitory effect of furosemide or acetazolamide on carbonic anhydrase is quickly reversible. Finally, the degree of the inhibitory effect of furosemide and of acetazolamide on CA are compared. The results show that furosemide inhibits CA less than acetazolamide.

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Available abstract

This study investigated the inhibitory effect of a high efficiency diuretic, furosemide, on carbonic anhydrase (CA). First, comparing the inhibitory effect of acetazolamide, a low efficiency diuretic, on CA, shows that furosemide or acetazolamide can quickly make CA inactive when its concentration is close to the enzyme concentration, different from the usual inhibitory kinetics in which the concentration of the inhibitor is far higher than the enzyme concentration. Secondly, the reaction of the enzyme indicates that the inhibitory effect of furosemide or acetazolamide on carbonic anhydrase is quickly reversible. Finally, the degree of the inhibitory effect of furosemide and of acetazolamide on CA are compared. The results show that furosemide inhibits CA less than acetazolamide.

Key concepts: Acetazolamide, Furosemide, Carbonic anhydrase, Diuretic, Carbonic anhydrase inhibitor, Chemistry, Inhibitory postsynaptic potential, Enzyme

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