The Roots of Anxiety Induced Pain

Conclusion: pain-induced anxiety is mediated by CRF neurotransmission in the LC through ERK1/2 signaling cascade.Figure: a) Schematic representation of the anatomical pathways implicated. Briefly, the contralateral LC indirectly receives inputs from the inflamed paw (red dashed line; ascending pathways) and, subsequently, the information is sent to corticolimbic areas. Additionally, the LC sends direct projections to the spinal cord (blue straight line; descending pathways). b) Body weight of the control and MA rats. c) Body rectal temperature of control and MA rats. d) Mechanical hyperalgesia represented by a significant decrease in the paw withdrawal threshold of the ipsilateral paw of MA rats. e) Mechanical allodynia represented by a significant decrease in the force threshold of the ipsilateral paw of MA rats. Graph depicting the expression of pERK1/2 in the LC after intra-LC administration of the αCRF receptor antagonist, showing that the significant increase of pERK1/2 in MA4W animals was no longer observed when this antagonist was administered.  g) Graph showing that the local administration of the αCRF antagonist had no significant effect on mechanical hyperalgesia in MA4W rats. h) Graph showing that local administration of h) Graph showing that local administration of the α-helical CRF antagonist had no significant effect on mechanical allodynia in the ipsilateral paw of MA rats. i) Graph showing that the time spent in the open arms decreased in MA4W rats rec...

Source: Neuromics - March 4, 2015 Category: Neuroscience Tags: corticotrophin-releasing factor receptor 1 CRP Immunhistochemistry pain induced anxiety. phospho-ERK1/2 antibody Western Blotting Source Type: news