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Glaucoma and the applications of carbonic anhydrase inhibitors

Andrea Scozzafava1, Claudiu T Supuran

  • 1Laboratorio di Chimcia Bioinorganica, Universita degli Studi di Firenze, Florence, Italy, andrea.scozzafava@unifi.it.

Sub-Cellular Biochemistry
|October 23, 2013
PubMed

Insights

Carbonic anhydrase inhibitors (CAIs) are crucial for treating glaucoma by lowering intraocular pressure (IOP). Newer generations of CAIs, including novel sulfonamides and dithiocarbamates, show promise for glaucoma treatment.

Area of Science:

  • Pharmacology
  • Ophthalmology
  • Medicinal Chemistry

Background:

  • Glaucoma is a prevalent eye disease characterized by elevated intraocular pressure (IOP).
  • Carbonic anhydrase (CA) inhibition is a key therapeutic strategy for managing glaucoma.
  • Several CA isoforms (CA II, IV, XII) are implicated and targeted by inhibitors.

Purpose of the Study:

  • To review the development and therapeutic applications of carbonic anhydrase inhibitors (CAIs) in glaucoma treatment.
  • To highlight the evolution of CAIs from first-generation to novel third-generation compounds.
  • To discuss the potential of emerging CAI classes like dithiocarbamates.

Main Methods:

  • Review of existing literature on carbonic anhydrase inhibitors and their use in glaucoma.
  • Analysis of the chemical structures and mechanisms of action of different CAI generations.
  • Examination of preclinical and clinical data for novel CAI derivatives.

Main Results:

  • First-generation CAIs (acetazolamide, methazolamide, dichlorophenamide) are systemic drugs.
  • Second-generation CAIs (dorzolamide, brinzolamide) are topical eye drops with improved side effect profiles.
  • Third-generation CAIs, including nitric oxide-releasing sulfonamides and prostaglandin F agonist hybrids, show significant promise.
  • Dithiocarbamates also demonstrate IOP-lowering effects in animal models.

Conclusions:

  • Carbonic anhydrase inhibitors are a vital part of the glaucoma treatment armamentarium.
  • Ongoing development of novel CAIs, particularly third-generation inhibitors, offers improved efficacy and safety.
  • Combination therapies involving CAIs with other glaucoma medications enhance treatment outcomes.

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