Investigating Genes in Patients With Polymyositis and Dermatomyositis (UKMYONET)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT01171573
Recruitment Status : Recruiting
First Posted : July 28, 2010
Last Update Posted : December 4, 2018
Information provided by (Responsible Party):
Hector Chinoy, University of Manchester

July 27, 2010
July 28, 2010
December 4, 2018
January 2001
January 2020   (Final data collection date for primary outcome measure)
To identify any disease susceptibility genes associated with development and clinical characteristics of primary inflammatory muscle diseases, PM, DM and IBM. [ Time Frame: 20 years ]
Blood sample, DNA analysis, along with clinical data, matching genotype with phenotype
Same as current
Complete list of historical versions of study NCT01171573 on Archive Site
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Investigating Genes in Patients With Polymyositis and Dermatomyositis
Identification of Disease Susceptibility Genes Associated With Development and Clinical Characteristics of Primary Inflammatory Muscle Diseases, PM, DM and IBM.

Polymyositis (PM), dermatomyositis (DM) and inclusion body myositis (IBM)belong to a group of inflammatory muscle disorders, of unknown cause, that are characterised by skeletal muscle inflammation and progressive muscular weakness, which can be debilitating and chronic in nature (occasionally fatal).

The current treatment options for these conditions are steroids and various other immunosuppressive drugs. However, these are usually only partially effective at reducing symptoms, and their toxic side effects also limit their usefulness. In order to develop more specific treatments for myositis in the future (and therefore more effective), it is important to understand the exact mechanisms that cause the disease in the first instance. In other similar inflammatory diseases such as rheumatoid arthritis (RA) and systemic lupus (SLE), it is known that changes to the Human Leukocyte Antigen(HLA), as well as certain inflammatory cytokines, are involved in both the development and expression of the disease.

As many of the inflammatory mechanisms that cause damage in PM, DM and IBM are similar to those in RA and SLE, it seems likely that similar genetic factors will also be involved in the development and expression of PM, DM and IBM.

In order to understand the genetic aspects / causes of myositis, and ultimately develop more effective treatment therapies in the future, patients with PM, DM or IBM, will be asked to give 20 mls of blood. These blood samples, along with the patient's clinical details, will then be sent to the Centre for Integrated Genomic Medical Research (CIGMR), at The University of Manchester, where all of the genetic analyses will take place. By understanding the genetic cause of the disease, it should be possible to design specific drugs for treating the condition in the future.

In order to understand the genetic aspects / causes of myositis, and ultimately develop more effective treatment therapies, it will be necessary to collect blood samples and clinical details from around 1000 patients with myositis. As the condition is very rare, it will not be possible to get the required number of patients from one centre alone, and therefore, a collaborative, multicentred approach will be needed. Consultant rheumatologists and neurologists throughout the UK, who have patients with PM, DM or IBM, will be approached, and asked if they would like to officially enter into the myositis genomic multicentred study. Once ethical and R&D approval has been granted, consultants will be named as the 'Principal Investigators' at each of these 'research sites' and could then start to recruit suitable patients into the study.

Patients from each research site, with definite PM, DM or IBM, will be asked by their own consultants (Principal Investigator) to give 20 mls of blood via venepuncture for genetic and antibody analysis. The PI will also complete a clinical/laboratory proforma, for each patient, regarding their disease characteristics, to allow subsequent confirmation that patients' disease is indeed definite, and this proforma and the blood sample will be sent to CIGMR. All of the genetic analyses, will take place at CIGMR, but storage of clinical details and certain patient identifiers will be stored at SRFT on a password protected NHS tust computer.

This study will be co−ordinated by Dr RG Cooper through the Rheumatic Diseases Centre, Salford Royal NHS Foundation Trust (SRFT), and Professor Bill Ollier from the Centre for Integrated Genomic Medical Research unit (CIGMR), Stopford Building, Manchester University.

Observational Model: Case-Control
Time Perspective: Prospective
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Retention:   Samples With DNA
DNA and serum
Probability Sample
Potential participants will be identified at their routine attendance of myositis clinics at participating centres, by the study PI. Before recruitment, each prospective candidate will be given a full explanation of the study, provided with a patient information sheet (PIS) and consent form to read, and given the opportunity to ask any questions that may arise. Once all questions have been answered and the Principal Investigator is assured that the individual understands what is required, informed consent can then be sought.
Procedure: Venepuncture
Venepuncture - Taking blood
  • Myositis Patients
    Cases with myositis PM DM IBM Venepuncture
    Intervention: Procedure: Venepuncture
  • Healthy controls
    Intervention: Procedure: Venepuncture
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*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Same as current
January 2020
January 2020   (Final data collection date for primary outcome measure)

Inclusion Criteria:

Cases must fulfil Bohan and Peter Diagnostic Criteria for Adult PM/DM

  1. Symmetrical weakness of limb-girdle muscles and/or anterior neck flexors.
  2. Muscle biopsy evidence typical of myositis.
  3. Elevation of serum skeletal muscle enzymes.
  4. Typical EMG features of myositis.
  5. Typical DM rash, including:

Probable / definite PM: at least 3 of items 1-4 +ive. Probable / definite DM: item 5 & at least 2 of items 1-4 +ive.

Exclusion Criteria:

  • Patients below the age of 18 years
  • Patients with myositis secondary to alcohol or drug abuse, non abusive drug ingestion (e.g with statins, fibrates etc)
  • Patients with myositis following a recent viral illnesses.
  • Patients unable to consent for themselves due to diminished mental capacity
  • Patients that can not speak sufficiently good English.
  • Patients unwilling to give blood sample.
Sexes Eligible for Study: All
18 Years to 70 Years   (Adult, Older Adult)
Contact: Bill Ollier, BSC Zoology 0161 2755622
Contact: Robert G Cooper, MD 0161 206 1483 ext 61483
United Kingdom
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Hector Chinoy, University of Manchester
Salford Royal NHS Foundation Trust
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Principal Investigator: Robert Dr Cooper SRFT
Salford Royal NHS Foundation Trust
November 2018