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Collection, Isolation, and Flow Cytometric Analysis of Human Endocervical Samples
Published on: July 6, 2014
18.6K
Human cathelicidin production by the cervix
Lorraine Frew1, Sofia Makieva1, Andrew T M McKinlay1
1Tommy's centre for Maternal and Fetal Health, MRC Centre for Reproductive Health, The University of Edinburgh, Edinburgh, United Kingdom.
Plos One
|August 5, 2014
Summary
Human cathelicidin (hCAP18/LL-37) is inducible in the cervix, particularly during bacterial vaginosis. Vitamin D upregulates its gene expression, and LL-37 promotes inflammation, suggesting a role in lower genital tract host defense.
Area of Science:
- Immunology
- Reproductive Biology
- Microbiology
Background:
- Host defense peptides, like human cathelicidin (hCAP18/LL-37), are crucial for innate immunity.
- The role of hCAP18/LL-37 in the female lower genital tract, particularly concerning fertility and pregnancy, remains largely uncharacterized.
Purpose of the Study:
- To investigate the production, regulation, and function of cathelicidin in the human cervix.
Main Methods:
- Analysis of cervicovaginal secretions from pregnant women.
- Gene expression studies in endocervical epithelial cell lines.
- Exposure of cell lines to vitamin D metabolites and synthetic LL-37.
Main Results:
- hCAP18/LL-37 was detected in cervicovaginal secretions, with higher levels in bacterial vaginosis.
- Vitamin D metabolites (1,25-dihydroxyvitamin D3 and 25-hydroxyvitamin D3) upregulated CAMP gene expression.
- Synthetic LL-37 exposure induced pro-inflammatory cytokine IL-8 secretion in endocervical cells.
Conclusions:
- hCAP18/LL-37 expression is inducible in the female lower reproductive tract.
- This peptide may modulate host defense against infections in the cervix.
- Further research could inform strategies for preventing infection-associated preterm birth.
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