ReviewInternational journal of molecular sciences2026
Carbonic Anhydrase I and II as Biomarkers and Therapeutic Targets in Human Disease: From Physiology to Clinical Translation.
Review in International journal of molecular sciences, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
3 authors.
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Abstract
Carbonic anhydrases (CAs) are zinc-containing metalloenzymes that catalyze the reversible conversion of carbon dioxide and water into bicarbonate and protons, contributing to acid-base balance, pH regulation, and ion transport. Among human cytosolic isoforms, carbonic anhydrase I (CA I) and carbonic anhydrase II (CA II) are abundant and clinically relevant, yet their distinct roles are often obscured within broader discussions of the CA family. This narrative review evaluates CA I and CA II as biomarkers and therapeutic targets in glaucoma, atherosclerosis and vascular calcification, anemia, epilepsy, Alzheimer's disease, obstructive sleep apnea, obesity-related metabolic dysfunction, and selected cancers. CA II emerges as the more established pharmacological target, particularly in glaucoma, with acetazolamide and sultiame showing therapeutic potential in obstructive sleep apnea and possible contributions to epilepsy and neurodegeneration through pH regulation, bicarbonate-dependent signaling, and mitochondrial function. CA I instead appears more valuable as a disease-associated biomarker, especially in disorders involving erythrocyte turnover, inflammation, anemia, and malignancy, though circulating CA I may be confounded by hemolysis and altered erythrocyte dynamics. Clinical translation requires isoform-selective modulators, tissue-targeted delivery, standardized biomarker assays, and mechanistic models distinguishing primary CA involvement from secondary disease-related changes.
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