title: Exercise training attenuates neuropathic pain and cytokine expression after chronic constriction injury of rat sciatic nerve.
abstract: BACKGROUND
  The underlying mechanism of exercise on neuropathic pain is not well understood. We investigated whether physical exercise regulates the functional recovery and heat shock protein 72 (Hsp72), tumor necrosis factor-α (TNF-α), and interlukin-1β (IL-1β) expression after chronic constriction injury (CCI) of the sciatic nerve.
  
  
  METHODS
  Male Sprague-Dawley rats were divided into 7 groups: control, sham operated (SO), SO with swimming or treadmill exercise (SOSE or SOTE), CCI, CCI with swimming or treadmill exercise (CCISE or CCITE). We recorded body weight, thermal withdrawal latency, and mechanical withdrawal threshold as well as Hsp72, TNF-α, and IL-1β expression in sciatic nerve.
  
  
  RESULTS
  The body weights in the control and SO groups were heavier than those in the SOSE, SOTE, CCI, CCISE, and CCITE groups. CCI rats with swimming or treadmill exercise showed significant increase in thermal withdrawal latency and mechanical withdrawal threshold when compared with CCI rats without exercise on day 21 after CCI. Both CCISE and CCITE groups demonstrated greater Hsp72 expression and lower TNF-α or IL-1β level than did the CCI group in sciatic nerve on day 21 after CCI.
  
  
  CONCLUSIONS
  These results suggest that progressive exercise training decreases peripheral neuropathic pain as well as TNF-α and IL-1β overproduction and increases HSP72 expression after CCI of the sciatic nerve.
authors.affiliation: Department of Physical Therapy, China Medical University, Taichung, Taiwan.
authors.forename: Yu-Wen
authors.initials: YW
authors.lastname: Chen
authors.forename: Yung-Tsung
authors.initials: YT
authors.lastname: Li
authors.forename: Yu Chung
authors.initials: YC
authors.lastname: Chen
authors.forename: Zong-Ying
authors.initials: ZY
authors.lastname: Li
authors.forename: Ching-Hsia
authors.initials: CH
authors.lastname: Hung
mesh_terms: D000818:Animals; D001835:Body Weight; D003250:Constriction; D016207:Cytokines / Q000378:metabolism*; D004195:Disease Models, Animal; D050884:HSP72 Heat-Shock Proteins / Q000378:metabolism; D006930:Hyperalgesia / Q000276:immunology / Q000503:physiopathology / Q000517:prevention & control; D053583:Interleukin-1beta / Q000378:metabolism; D008297:Male; D010147:Pain Measurement; D017288:Pain Threshold; D005082:Physical Exertion; D051381:Rats; D017207:Rats, Sprague-Dawley; D011930:Reaction Time; D012420:Running; D012584:Sciatic Nerve / Q000276:immunology / Q000293:injuries / Q000473:pathology / Q000503:physiopathology*; D020426:Sciatic Neuropathy / Q000209:etiology / Q000276:immunology / Q000503:physiopathology / Q000517:prevention & control*; D013550:Swimming; D013997:Time Factors; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism
chemical_list: D016207:Cytokines; D050884:HSP72 Heat-Shock Proteins; D053583:Interleukin-1beta; D014409:Tumor Necrosis Factor-alpha