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The drug is occasionally used on an intermittent basis to prevent seizures in catamenial epilepsy. [10] The sulfur-containing antiseizure and antimigraine drug topiramate is a weak inhibitor of carbonic anhydrase, particularly subtypes II and IV. [11] Whether carbonic anhydrase inhibition contributes to its clinical activity is not known.
For example, carbonic anhydrase produces acid in the stomach lining. In the kidney, the control of bicarbonate ions influences the water content of the cell. The control of bicarbonate ions also influences the water content in the eyes. Inhibitors of carbonic anhydrase are used to treat glaucoma, the excessive build-up of water in the eyes.
Carbonic anhydrase IX (CA9/CA IX) is an enzyme that in humans is encoded by the CA9 gene. [ 5 ] [ 6 ] [ 7 ] It is one of the 14 carbonic anhydrase isoforms found in humans and is a transmembrane dimeric metalloenzyme with an extracellular active site that facilitates acid secretion in the gastrointestinal tract. [ 8 ]
Isolated hyperchlorhidrosis, also known as Carbonic anhydrase XII deficiency, is a rare autosomal recessive genetic condition characterized by a lifelong tendency to lose massive amounts of sodium and chloride through sweat which leads to various symptoms.
Sultiame (or sulthiame) is a sulfonamide and inhibitor of the enzyme carbonic anhydrase. It is used as an anticonvulsant and in recent studies showed promise in reducing sleep disordered breathing and other symptoms of obstructive sleep apnea (OSA).
Dichlorphenamide as a carbonic anhydrase inhibitor is used for the treatment of acute angle closure glaucoma. While Dichlorphenamide does contain two sulfate groups within the structure, it falls under the class of a first generation carbonic anhydrase Inhibitor.
Rarely, the inhibition of carbonic anhydrase may be strong enough to cause metabolic acidosis of clinical importance. [44] The U.S. Food and Drug Administration (FDA) has notified prescribers that topiramate can cause acute myopia and secondary angle closure glaucoma in a small subset of people who take topiramate regularly. [45]
Carbonic anhydrases (CAs) are a large family of zinc metalloenzymes that catalyze the reversible hydration of carbon dioxide. They participate in various biological processes, including respiration, calcification , acid-base balance, bone resorption , and the formation of aqueous humor, cerebrospinal fluid , saliva, and gastric acid.