Genetic Polymorphisms of Mannan-binding Lectin (MBL)and Serum Levels of MBL in Patients With Endometriosis

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. Read our disclaimer for details. Identifier: NCT01738932
Recruitment Status : Completed
First Posted : November 30, 2012
Last Update Posted : November 30, 2012
Aalborg Universitetshospital
Information provided by (Responsible Party):
University of Aarhus

Brief Summary:
The purpose of the study is to investigate the possible association between low levels of MBL and the development of endometriosis

Condition or disease

Detailed Description:

Endometriosis is a chronic, inflammatory disease, affecting approximately 10% of the female population. The pathogenesis of endometriosis is still unclear, but several studies have indicated that the immune system is involved. It has been suggested that endometriosis should be considered an autoimmune disease, considering the findings of elevated levels of cytokines, decreased cell apoptosis, increased incidence of autoantibodies and a higher frequency of other autoimmune diseases in endometriosis patients. MBL participates in the innate immune defence by activating complement on the surfaces of microorganisms, but several studies have suggested that MBL is also involved in autoimmune diseases. The individual MBL level is highly variable due to a number of polymorphic sites in the structural gene and in the promoter region, and approximately 12 % of the normal population have very low serum MBL levels (<100 ng/ml).

The possible association between MBL and endometriosis has been investigated in two small studies, in which no association was found. The aim of the present study is to investigate the prevalence of individuals with low serum levels of MBL and with genotypes associated with low MBL production in a larger group of endometriosis patients.

Study Type : Observational
Actual Enrollment : 100 participants
Observational Model: Case Control
Time Perspective: Cross-Sectional
Official Title: Genetic Polymorphisms of Mannan-binding Lectin (MBL) and Serum Levels of MBL in Patients With Endometriosis
Study Start Date : December 2006
Primary Completion Date : June 2007
Study Completion Date : June 2007

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Endometriosis
U.S. FDA Resources

women with histologically verified endometriosis
Healthy Danish blood donors

Primary Outcome Measures :
  1. Frequency of individuals with s-MBL < 100 ng/ml [ Time Frame: baseline ]
  2. Frequency of individuals with MBL genotypes LXPA/O or O/O [ Time Frame: baseline ]

Biospecimen Retention:   Samples With DNA
Serum, EDTA blood

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 50 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Endometriosis patients referred to the endometriosis clinic at Aarhus University Hospital

Inclusion Criteria:

  • histologically verified endometriosis
  • ASRM stage 2-4

Exclusion Criteria:

  • pregnancy
  • actual treatment with GnRh analog
  • autoimmune diseases

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01738932

Aarhus University Hospital, Department of Gynecology and Obstetrics
Aarhus, Denmark, 8200 N
Sponsors and Collaborators
University of Aarhus
Aalborg Universitetshospital
Principal Investigator: Christina Kruse, PhD Aarhus University Hospital

Publications of Results:
Responsible Party: University of Aarhus Identifier: NCT01738932     History of Changes
Other Study ID Numbers: MBLendo06
First Posted: November 30, 2012    Key Record Dates
Last Update Posted: November 30, 2012
Last Verified: November 2012

Keywords provided by University of Aarhus:
mannan-binding lectin

Additional relevant MeSH terms:
Genital Diseases, Female