Analysis of matrix metalloproteinase-7 expression in eutopic and ectopic endometrium samples from patients with
Sachiko Matsuzaki1, Elodie Maleysson, Claude Darcha
1CHU Clermont-Ferrand, Polyclinique-Hôtel-Dieu, Gynécologie Obstétrique et Médecine de la Reproduction, Boulevard Léon Malfreyt, 63058 Clermont-Ferrand, France. sachikoma@aol.com
Background:
The objective of the present study was to expand our understanding of the role of matrix metalloproteinase-7 (MMP-7) in the pathophysiology of endometriosis.
Methods:
Expression levels of MMP-7 mRNA and protein in the eutopic endometrium and ectopic endometrium of patients with different forms of endometriosis were measured with immunohistochemistry and real-time RT-PCR. Endometrial tissues from patients with uterine myomas and those with macroscopically normal pelvic cavities were included as comparison groups. The real-time RT-PCR utilized endometrial cells isolated by laser capture microdissection. MMP-7 immunostained cells were quantified using a computerized image analysis system.
Results:
MMP-7 expression levels were significantly higher in the endometrial epithelial cells from patients with deep infiltrating endometriosis compared with those isolated from the endometria of patients with only superficial peritoneal endometriosis, uterine myomas or normal endometrium, in the proliferative, late secretory and menstrual phases. MMP-7 protein expression was detected in the ectopic endometrial epithelial cells of 13 samples of deep infiltrating endometriosis (24.5%), 11 samples of ovarian endometriosis (28.6%), 23 samples of black peritoneal lesions (76.7%) and 24 samples of red peritoneal lesions (100%). MMP-7 protein expression in epithelial cells was significantly higher in red peritoneal lesions compared with that of deep infiltrating endometriosis, ovarian endometriosis and black peritoneal lesions, in all phases of the menstrual cycle.
Conclusion:
These findings suggest that MMP-7 expression levels vary significantly among the different forms of endometriosis.
Insights
Matrix metalloproteinase-7 (MMP-7) levels are elevated in endometriosis, particularly in red peritoneal lesions. MMP-7 expression differs across endometriosis subtypes, indicating its varied role in the disease.
Area of Science:
- Reproductive biology
- Molecular pathology
- Gynecology
Background:
- Endometriosis is a complex gynecological condition.
- Matrix metalloproteinase-7 (MMP-7) is implicated in tissue remodeling and disease pathophysiology.
- Understanding MMP-7's role in endometriosis is crucial for advancing treatment strategies.
Purpose of the Study:
- To investigate the expression patterns of MMP-7 in various forms of endometriosis.
- To correlate MMP-7 levels with the severity and type of endometriosis.
- To elucidate the specific contribution of MMP-7 to endometriosis pathogenesis.
Main Methods:
- Quantitative analysis of MMP-7 mRNA and protein in eutopic and ectopic endometrial tissues using real-time RT-PCR and immunohistochemistry.
- Laser capture microdissection for isolating endometrial epithelial cells.
- Computerized image analysis for quantifying MMP-7 immunostaining.
- Inclusion of control groups with uterine myomas and normal pelvic cavities.
Main Results:
- Significantly higher MMP-7 mRNA and protein expression in endometrial epithelial cells of patients with deep infiltrating endometriosis compared to superficial endometriosis, uterine myomas, or normal endometrium.
- MMP-7 protein detected in ectopic endometrial epithelial cells across different endometriosis types: deep infiltrating (24.5%), ovarian (28.6%), black peritoneal lesions (76.7%), and red peritoneal lesions (100%).
- MMP-7 protein expression was markedly higher in red peritoneal lesions compared to deep infiltrating, ovarian, and black peritoneal lesions across all menstrual cycle phases.
Conclusions:
- MMP-7 expression levels exhibit significant variation among different forms of endometriosis.
- These findings highlight MMP-7 as a potential biomarker and therapeutic target in endometriosis.
- The differential expression suggests a specific role for MMP-7 in the progression of distinct endometriosis subtypes.
