Expression of functional μ-opioid receptors during T cell development

L McCarthy, I Szabo, JF Nitsche, JE Pintar… - Journal of …, 2001 - Elsevier
We have examined the chemotactic responsiveness of thymocytes to selective μ-, κ-, and δ-
opioid agonists. Our results show that developing T cells migrate in response to μ-, but not κ-
or δ-opioids. The μ-opioid response appears to be dependent on the classical μ-opioid
receptor (MOR-1) since the chemotactic response is blocked by a selective μ-opioid
antagonist, and is absent in thymocytes from MOR-1-deficient mice. Flow cytometric analysis
of the μ-opioid responsive cells shows that these cells consist predominantly of highly …