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Opioids exert their pharmacological actions through three opioid receptors, mu, delta and kappa whose genes have been cloned (Oprm, Oprd1 and Oprk1, respectively). Opioid receptors in the brain are activated by a family of endogenous peptides which are released by neurons.
Considering this, how many types of opioid receptors are there?
three
In this manner, what are the types of opioid receptors?
There are 4 types of opioid receptors that have been identified: mu, delta, kappa, and opioid-receptor like-1 (ORL-1). Some of the receptors may be further divided into subtypes.
The National Institute on Drug Abuse (NIDA) at NIH funded a new study researching the delta opioid receptor (DOR), a pain receptor located under the skin that regulates minor skin sensations like touch and warming.