Study of Proteins Associated With Complex Regional Pain Syndrome - Full Text View

Sponsor:	National Institute of Dental and Craniofacial Research (NIDCR)
Information provided by:	National Institutes of Health Clinical Center (CC)
ClinicalTrials.gov Identifier:	NCT00033969

Purpose

This study will try to learn more about complex regional pain syndrome, or CRPS (previously known as reflex sympathetic dystrophy, spreading neuralgia, and sympathalgia), by examining the release of small proteins in the blood of patients with this condition. Patients with CRPS usually have three types of symptoms:

Sensory abnormalities - increased sensitivity to pain or a painful reaction to a harmless stimulus
Perfusion abnormalities - alterations in blood flow, temperature abnormality, swelling, decrease or increased nail growth, and hair and skin changes
Motor abnormalities - weakness, guarding (Holding the limb in such a fashion that it minimizes accidental or intentional contact from possible sources of pain), and atrophy (wasting)

The cause of CRPS is unknown, and there are no definitive diagnostic tests for the condition. Because early treatment improves the prognosis of CRPS, a test that enables early diagnosis would be important for optimal medical management. The findings of this study may contribute to the development of such a test and possibly new drug treatments.

Normal healthy volunteers and patients of any age with complex regional pain syndrome who are in otherwise good general health may be eligible for this study.

Participants will have a medical history, physical examination and collection of a blood sample. They will fill out several questionnaires, providing information on their health, personality, mood, pain levels, and symptoms. Participation in the study requires one outpatient clinic visit.

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Condition
Complex Regional Pain Syndromes Healthy

Study Type:	Observational
Official Title:	Complex Regional Pain Syndrome Proteomics Study

Resource links provided by NLM:

MedlinePlus related topics: Complex Regional Pain Syndrome

U.S. FDA Resources

Further study details as provided by National Institutes of Health Clinical Center (CC):

Estimated Enrollment:	120
Study Start Date:	April 2002
Primary Completion Date:	December 2007 (Final data collection date for primary outcome measure)

Detailed Description:

The etiology of Complex Regional Pain Syndrome (CRPS) is unknown but a patient typically presents with a triad of clinical findings: sensory abnormalities, perfusion abnormalities and alterations in motor function. Since some of these findings are seen in the other disease states, the diagnosis is often not clear. A response to a sympathetic ganglion block (stellate or lumbar) is also suggestive of the disorder. However, there is no definitive diagnostic test for CRPS. Experience has shown that early aggressive treatment improves the prognosis. Therefore, tests that facilitate the early diagnosis would have important clinical implications.

Advances in laboratory techniques allow analysis of clinical samples to identify protein or patterns of protein changes associated with a disease state. Patients suffering with CRPS who are currently seen in a pain clinic will be asked to participate in this study. The subjects will complete a brief symptom survey, be examined by a co-investigator to document sensory, temperature and trophic changes, and have a blood sample collected. Blood samples from age-matched controls will be collected from non-CRPS patients. Fifty patient samples collected from each group will be analyzed and used to teach the diagnostic software and an additional 20 samples (10 controls, 10 CRPS patients) will be used to validate diagnostic accuracy.

Eligibility

Genders Eligible for Study:	Both
Accepts Healthy Volunteers:	No

Criteria

INCLUSION CRITERIA

Male or female volunteers referred by their physician with the diagnosis of CRPS

Age restrictions: none

Good general health

Willing to have blood drawn

Willing to have behavioral measures

Willing to provide a directed medical history

There is expected to be a greater number of females than males being recruited to this study since there is a much higher occurrence of CRPS in women. Additionally, it is expected to be equal across all ethnic groups. However, we do not anticipate requiring any special recruiting strategies for specific gender or ethnic groups.

EXCLUSION CRITERIA

Contradiction to blood screening

Advanced disease other than the CRPS (cardiovascular, liver, kidney disease-ASA III or above excluding CRPS) that may cause a theoretical inclusion of samples resulting in confounding results.

No exclusions will be made based on race, gender, or religion.

Contacts and Locations

Please refer to this study by its ClinicalTrials.gov identifier: NCT00033969

Locations

United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike
Bethesda, Maryland, United States, 20892

Sponsors and Collaborators

National Institute of Dental and Craniofacial Research (NIDCR)

More Information

Additional Information:

NIH Clinical Center Detailed Web Page This link exits the ClinicalTrials.gov site

Publications:

Bichsel VE, Liotta LA, Petricoin EF 3rd. Cancer proteomics: from biomarker discovery to signal pathway profiling. Cancer J. 2001 Jan-Feb;7(1):69-78. Review.

Bittner M, Meltzer P, Chen Y, Jiang Y, Seftor E, Hendrix M, Radmacher M, Simon R, Yakhini Z, Ben-Dor A, Sampas N, Dougherty E, Wang E, Marincola F, Gooden C, Lueders J, Glatfelter A, Pollock P, Carpten J, Gillanders E, Leja D, Dietrich K, Beaudry C, Berens M, Alberts D, Sondak V. Molecular classification of cutaneous malignant melanoma by gene expression profiling. Nature. 2000 Aug 3;406(6795):536-40.

Chelimsky TC, Low PA, Naessens JM, Wilson PR, Amadio PC, O'Brien PC. Value of autonomic testing in reflex sympathetic dystrophy. Mayo Clin Proc. 1995 Nov;70(11):1029-40.

Study ID Numbers:	020169, 02-D-0169
Study First Received:	April 17, 2002
Last Updated:	August 24, 2009
ClinicalTrials.gov Identifier:	NCT00033969 History of Changes
Health Authority:	United States: Federal Government

Keywords provided by National Institutes of Health Clinical Center (CC):

CRPS
RSD
Causalgia
Chronic Pain
Neuropathic Pain
Normal Control

Complex Regional Pain Syndrome
CRPS
RSD
Healthy Volunteer
HV

Additional relevant MeSH terms:

Autonomic Nervous System Diseases
Pathologic Processes
Disease
Neuromuscular Diseases
Complex Regional Pain Syndromes

Mental Disorders
Peripheral Nervous System Diseases
Syndrome
Nervous System Diseases
Somatoform Disorders

ClinicalTrials.gov processed this record on November 25, 2009