Related Experiment Videos
Feto-maternal microchimerism in connective tissue diseases
Monique Gannagé1, Zahir Amoura, Olivier Lantz
1Laboratory of Immunology, Hôpital Necker, Paris, France.
European Journal of Immunology
|November 15, 2002
Summary
Fetal progenitor cells (microchimerism) are common in mothers, regardless of health status or connective tissue disease. This study found no increased risk associated with feto-maternal microchimerism in these conditions.
Area of Science:
- Immunology
- Reproductive Biology
- Genetics
Background:
- Fetal progenitor cells can persist in maternal circulation for years, a phenomenon known as feto-maternal microchimerism.
- While microchimerism has been linked to scleroderma, its role in connective tissue diseases is debated.
- Understanding the prevalence and significance of microchimerism in healthy women and those with connective tissue diseases is crucial.
Purpose of the Study:
- To investigate the prevalence of feto-maternal microchimerism in women with scleroderma and other connective tissue diseases compared to healthy controls.
- To determine if the presence of male fetal cells (SRY sequence) is associated with an increased risk of these autoimmune conditions.
Main Methods:
- Studied 243 females: 50 healthy controls, 23 scleroderma patients, 49 other connective tissue disease patients, and 121 women who never carried a male fetus.
- Utilized a sensitive kinetic quantitative ELISA PCR assay to detect the male-specific SRY sequence, indicating the presence of male fetal cells.
- Analyzed the percentage and mean number of SRY-positive samples across different study groups.
Main Results:
- The percentage of SRY-positive samples was similar among women who had carried a male fetus, irrespective of their health status or diagnosis (16% controls, 21.7% scleroderma, 25.5% CTD).
- The mean number of fetal cells detected was comparable across all groups.
- Among women who never carried a male fetus, SRY positivity was observed in 33% of scleroderma patients and 22.9% of CTD patients, potentially linked to early miscarriages.
Conclusions:
- Feto-maternal microchimerism is a common occurrence in both healthy women and those with connective tissue diseases.
- The presence of microchimerism alone does not appear to be a significant risk factor for developing scleroderma or other connective tissue diseases.
- Further research may explore the implications of microchimerism in cases of prior early miscarriage.