Monoamine Oxidase
Full Form of MAO
What is MAO?
Monoamine Oxidase (MAO) is an enzyme found in the outer mitochondrial membrane of cells, primarily in the brain, liver, and other tissues. It plays a critical role in the breakdown of monoamine neurotransmitters such as dopamine, serotonin, and norepinephrine, thereby regulating mood, emotion, and arousal. In India, MAO is a key topic in medical and pharmacology curricula, especially for NEET, AIIMS, and pharmacy entrance exams. Understanding its function is essential for grasping the mechanism of antidepressant drugs known as MAO inhibitors (MAOIs), which are used to treat depression and anxiety disorders. The enzyme exists in two subtypes, MAO-A and MAO-B, each with distinct substrate preferences and tissue distribution. MAO-A primarily metabolizes serotonin and norepinephrine, while MAO-B acts on dopamine. This distinction is clinically important because selective inhibitors target specific subtypes to reduce side effects. In Indian clinical practice, MAOIs are prescribed cautiously due to dietary restrictions involving tyramine-rich foods. Overall, MAO is a fundamental biochemical concept with direct therapeutic applications.
MAO का फुल फॉर्म
मोनोअमाइन ऑक्सीडेज
Example
The psychiatrist explained that the patient's depression might be treated with a reversible MAO inhibitor to avoid dietary interactions.