Title:Monoamine Oxidase: A Potential Link in Papez Circuit to Generalized
Anxiety Disorders
Volume: 23
Issue: 5
Author(s): Ravikant Sharma, Murali Kumarasamy, Vipan Kumar Parihar, V. Ravichandiran and Nitesh Kumar*
Affiliation:
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education
and Research, Hajipur, Vaishali-844102, Bihar, India
Keywords:
Anxiety, monoamine oxidase, papez circuit, epigenetics, mitochondrial dysfunction, oxidative stress.
Abstract: Anxiety is a common mental illness that affects a large number of people around the world,
and its treatment is often based on the use of pharmacological substances such as benzodiazepines,
serotonin, and 5-hydroxytyrosine (MAO) neurotransmitters. MAO neurotransmitters levels are deciding
factors in the biological effects. This review summarizes the current understanding of the MAO
system and its role in the modulation of anxiety-related brain circuits and behavior. The MAO-A polymorphisms
have been implicated in the susceptibility to generalized anxiety disorder (GAD) in several
investigations. The 5-HT system is involved in a wide range of physiological and behavioral processes,
involving anxiety, aggressiveness, stress reactions, and other elements of emotional intensity.
Among these, 5-HT, NA, and DA are the traditional 5-HT neurons that govern a range of biological
activities, including sleep, alertness, eating, thermoregulation, pains, emotion, and memory, as anticipated
considering their broad projection distribution in distinct brain locations. The DNMTs (DNA
methyltransferase) protein family, which increasingly leads a prominent role in epigenetics, is connected
with lower transcriptional activity and activates DNA methylation. In this paper, we provide an
overview of the current state of the art in the elucidation of the brain's complex functions in the regulation
of anxiety.