Comprehensive behavioral analyses of anoctamin1/TMEM16A-conditional knockout mice
Related Experiment Video
Updated: Feb 8, 2026

Author Spotlight: Exploring Neural Correlates of Defensive Behaviors in Fear Learning and Extinction
Published on: December 15, 2023
Kyoung Hee Seo1, Yeonsun Jin1, Sun-Young Jung2
1Department of Pharmacology, College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea.
Aims:
Anoctamin-1 (TMEM16A) is a calcium-activated chloride channel that is involved in numerous physiological conditions. Its role has been identified in electrophysiological and histological studies of genetic knockout animals. Recent cellular localization studies have shown that anoctamin-1 is co-expressed with presynaptic proteins, therefore its role in presynaptic terminals has been suggested. However, behavioral studies are lacking because conventional knockouts of anoctamin-1 are lethal after birth. In this study, we explored the role of anoctamin-1 in presynaptic terminals by analyzing the behavior of mice with conditional knockouts of anoctamin-1 in synapsin1-expressing cells.
Main Methods:
Using a synapsin1-Cre system, we selectively ablated anoctamin-1 in synapsin1 expressing cells. The mice were used in the behavioral experiments when they were between 6 and 9 months of age.
Key Findings:
The mice with the conditional knockout of anoctamin-1 in synapsin1-expressing cells displayed impaired social behavior. In addition, the mice showed depressive-like behavior and decreased weight. However, these animals displayed normal locomotor activity, cognitive function, and motor coordination.
Significance:
These results suggested that anoctamin-1 is involved in psychiatric behavior because of its role in the regulation of synaptic transmission in presynaptic terminals.
Related Concept Videos
What is Behavior?
Conditions on Early Earth
Classical Conditioning
Ivan Pavlov observed that dogs...
Conditions of Equilibrium
Internal forces are not considered for conditions of equilibrium because they occur in equal and opposite pairs within the body, effectively canceling each other. As a result,...
Operant Conditioning
Reinforcement in operant conditioning can be positive or negative, both of which serve to increase the likelihood of a behavior. Positive...
Behaviorism
The core premise of behaviorism is its focus on observable behavior rather than internal thoughts or feelings. This approach argues that true scientific...

