Navigation Links
U. Iowa study finds biological link between pain and fatigue
Date:4/7/2008

A recent University of Iowa study reveals a biological link between pain and fatigue and may help explain why more women than men are diagnosed with chronic pain and fatigue conditions like fibromyalgia and chronic fatigue syndrome.

Working with mice, the researchers, led by Kathleen Sluka, Ph.D., professor in the Graduate Program in Physical Therapy and Rehabilitation Science in the UI Roy J. and Lucille A. Carver College of Medicine, found that a protein involved in muscle pain works in conjunction with the male hormone testosterone to protect against muscle fatigue.

Chronic pain and fatigue often occur together -- as many as three in four people with chronic, widespread musculoskeletal pain report having fatigue; and as many as 94 percent of people with chronic fatigue syndromes report muscle pain. Women make up the majority of patients with these conditions.

To probe the link between pain and fatigue, and the influence of sex, the UI team compared exercise-induced muscle fatigue in male and female mice with and without ASIC3 -- an acid-activated ion channel protein that the team has shown to be involved in musculoskeletal pain.

A task involving three one-hour runs produced different levels of fatigue in the different groups of mice as measured by the temporary loss of muscle strength caused by the exercise.

Male mice with ASIC3 were less fatigued by the task than female mice. However, male mice without the ASIC3 protein showed levels of fatigue that were similar to the female mice and were greater than for the normal males.

In addition, when female mice with ASIC3 were given testosterone, their muscles became as resistant to fatigue as the normal male mice. In contrast, the muscle strength of female mice without the protein was not boosted by testosterone.

"The differences in fatigue between males and females depends on both the presence of testosterone and the activation of ASIC3 channels, which suggests that they are interacting somehow to protect against fatigue," Sluka said. "These differences may help explain some of the underlying differences we see in chronic pain conditions that include fatigue with respect to the predominance of women over men."

The study, which was published in the Feb. 28 issue of the American Journal of Physiology - Regulatory, Integrative and Comparative Physiology, indicates that muscle pain and fatigue are not independent conditions and may share a common pathway that is disrupted in chronic muscle pain conditions. The team plans to continue their studies and investigate whether pain enhances fatigue more in females than males.

"Our long-term goal is to come up with better treatments for chronic musculoskeletal pain," Sluka said. "But the fatigue that is typically associated with chronic widespread pain is also big clinical problem -- it leaves people unable to work or engage in social activities. If we could find a way to reduce fatigue, we could really improve quality of life for these patients."


'/>"/>

Contact: Jennifer Brown
jennifer-l-brown@uiowa.edu
319-335-9917
University of Iowa
Source:Eurekalert

Related biology news :

1. New study finds uncontrollable stress worsens symptoms of endometriosis
2. New study finds anticipating a laugh reduces our stress hormones
3. New study shows Dermytol produces pronounced decrease in malignant melanoma tumor volume
4. 1/3 of risk for dementia attributable to small vessel disease, autopsy study shows
5. New study shows that fetal cells to treat Parkinsons disease may not function long term
6. Yale study shows how rare genes have big impact on blood pressure
7. NASA launches airborne study of arctic atmosphere, air pollution
8. Some migratory birds cant find success in urban areas, study finds
9. Study finds concerns with biofuels
10. Veterinary college researcher studying brain tumors in people and animals
11. Statistics are insufficient for study of proteins signal system
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/22/2017)... Vigilant Solutions , a vehicle location ... announced today the appointment of retired FBI special agent ... business development. Mr. Sheridan brings more than ... focus on the aviation transportation sector, to his new ... Sheridan served as the Aviation Liaison Agent Coordinator (ALAC) ...
(Date:3/16/2017)... CeBIT 2017 - Against identity fraud with DERMALOG solutions "Made in Germany ... ... in one project, multi-biometric solutions provide a crucial contribution against identity fraud. (PRNewsFoto/Dermalog Identification Systems) ... Used combined in one project, multi-biometric solutions provide a crucial ... ...
(Date:3/9/2017)... and MOUNTAIN VIEW, Calif. ... "Eating Well Made Simple," and 23andMe , the ... guide better food choices.  Zipongo can now provide customers ... food preferences, health goals and biometrics, but also genetic ... food choices. Zipongo,s personalized food decision support ...
Breaking Biology News(10 mins):
(Date:4/26/2017)... ... 26, 2017 , ... Baltimore bio tech firm, PathSensors, Inc., ... solution at the National Postal Forum 2017 in Baltimore, Maryland, May 21st through ... easy to use and low cost threat detection solution for government and commercial ...
(Date:4/26/2017)... ... April 26, 2017 , ... As the ... among healthcare industry stakeholders, the discussion surrounding the topic will continue at WEDI ... 2017 in Los Angeles, Calif. Hosted by the Workgroup for Electronic Data Interchange ...
(Date:4/25/2017)... Yorba Linda, Ca (PRWEB) , ... April 25, 2017 , ... ... latest webinar in the series will explore the laboratory testing for DIC in order ... a serious hypercoagulable disorder which can occur in hospitalized patients resulting in a high ...
(Date:4/25/2017)... Diego, CA (PRWEB) , ... April 25, 2017 ... ... division of L3 Healthcare, is pleased to announce the company is now a ... management. The iMedNet software certification enables the company’s clinical research team to ...
Breaking Biology Technology: