phosphodiesterase
This term is a highly specialized technical noun used almost exclusively within biochemistry, pharmacology, and molecular biology. It describes a specific class of enzymes responsible for the hydrolysis of phosphodiester bonds, which serves as a critical "off-switch" for secondary messengers like cAMP and cGMP in cellular signaling.
In clinical and pharmaceutical contexts, the term is frequently paired with "inhibitor" (PDE inhibitor). These inhibitors are used to treat various conditions, such as erectile dysfunction or chronic obstructive pulmonary disease, by preventing the enzyme from breaking down cyclic nucleotides, thereby prolonging their biological effect.
Meanings
An enzyme that breaks phosphodiester bonds, specifically those found in cyclic nucleotides such as cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP), thereby regulating intracellular signaling pathways.
The administration of a phosphodiesterase inhibitor can lead to increased levels of cAMP in the cell.