A1 adenosine receptor

The A1 adenosine receptor is a protein found on some cells in the body, especially in the brain and heart. It detects a chemical called adenosine, which builds up during rest or stress. When adenosine binds to this receptor, it helps reduce activity in the nervous system and can slow heart rate, promoting relaxation and sleep. This receptor plays a role in protecting tissues from damage during low oxygen and helps regulate overall brain and cardiovascular function. Medications targeting A1 receptors can influence sleep, reduce pain, or treat heart conditions.