I am a
Home I AM A Search Login

Papers of the Week


Papers: 26 Oct 2019 - 1 Nov 2019

RESEARCH TYPE:
Psychology


Animal Studies


2020 Feb


Pain


161


2

A somatosensory cortex input to the caudal dorsolateral striatum controls comorbid anxiety in persistent pain.

Authors

Jin Y, Meng Q, Mei L, Zhou W, Zhu X, Mao Y, Xie W, Zhang X, Luo M-H, Tao W, Wang H, Li J, Li J, Li X, Zhang Z
Pain. 2020 Feb; 161(2):416-428.
PMID: 31651582.

Abstract

Chronic pain and anxiety symptoms are frequently encountered clinically, but the neural circuit mechanisms underlying the comorbid anxiety symptoms in pain (CASP) in context of chronic pain remain unclear. Using viral neuronal tracing in mice, we identified a previously unknown pathway whereby glutamatergic neurons from layer 5 of the hindlimb primary somatosensory cortex (S1) (Glu), a well-known brain region involved in pain processing, project to GABAergic neurons in the caudal dorsolateral striatum (GABA). In a persistent inflammatory pain model induced by complete Freund's adjuvant injection, enhanced excitation of the Glu→GABA pathway was found in mice exhibiting CASP. Reversing this pathway using chemogenetic or optogenetic approaches alleviated CASP. In addition, the optical activation of Glu terminals in the cDLS produced anxiety-like behaviors in naive mice. Overall, the current study demonstrates the putative importance of a novel Glu→GABA pathway in controlling at least some aspects of CASP.