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Updated: Aug 21, 2025
Mouse Model of Surgically-induced Endometriosis by Auto-transplantation of Uterine Tissue
Published on: January 6, 2012
Angiogenic and Inflammatory Alterations of Endometriotic Lesions in a Transgenic Animal Experimental Model With Loss
Vasilios Pergialiotis1, Nikolaos Zarkadoulas2, Kallirroi Goula3
1First Department of Obstetrics and Gynecology, National and Kapodistrian University of Athens, Athens, GRC.
Introduction:
Peroxisome proliferator-activated receptors (PPARs) have been proposed as a medical treatment against endometriosis in preclinical and clinical studies. Their effect seems to be triggered through the suppression of angiogenesis. In the present study, we used a transgenic animal model with a loss of expression of PPAR-alpha receptors to examine their effect on the course of surgically induced endometriotic lesions.
Methods:
Ten C57BL/6 mice that served as controls and 10 B6;129S4-PPARatm1Gonz/J t transgenic mice characterized by absolute loss of expression of PPAR-alpha receptors were used for induction of endometriosis with a previously described surgical technique.
Results:
Five animals (50%) exhibited abundant endometriotic crypts in the control group whereas only one (10%) animal in the transgenic experimental group had a similar pathological image. Neo-vascularization significantly differed among the two groups (p=0.034) favoring the control group as it was extremely limited in half of the PPAR-alpha null animals. The median inflammation score was 2.5 (1-4) in the P B6;129S4-PPARatm1Gonz/J group, whereas it was minimal, 1 (0-2), in the C57BL/6 group. However, these differences were not statistically significant (p=0.101). The fibroblastic activity was also very limited in the PPAR-alpha-deficient model, whereas animals belonging to the control group exhibited an intermediate increase of this index (p=0.022).
Conclusion:
Surgically induced endometriotic implants in animals with loss of expression of PPAR-alpha receptors exhibit significant differences in their pathology compared to lesions induced in control animals. This information suggests that PPAR-alpha receptors have a significant impact on the course of the disease, indicating that they may serve as potential targets for future medical therapies.
Insights
PPAR-alpha receptors significantly impact endometriosis progression. Loss of these receptors in mice reduced endometriotic lesion development and vascularization, suggesting PPAR-alpha as a potential therapeutic target for endometriosis.
Area of Science:
- Reproductive biology and disease research.
- Molecular mechanisms of gynecological disorders.
Background:
- Peroxisome proliferator-activated receptors (PPARs) are investigated for endometriosis treatment.
- PPARs' therapeutic effect is linked to suppressing angiogenesis.
- This study examines PPAR-alpha receptor's role in surgically induced endometriosis.
Purpose of the Study:
- To investigate the role of PPAR-alpha receptors in the development of endometriosis.
- To compare the pathological features of endometriotic lesions in PPAR-alpha deficient mice versus control mice.
Main Methods:
- Utilized a transgenic mouse model lacking PPAR-alpha receptors (B6;129S4-PPARa tm1Gonz/J).
- Induced endometriosis using a standardized surgical technique in both transgenic and control (C57BL/6) mice.
- Analyzed endometriotic crypts, neo-vascularization, inflammation, and fibroblastic activity.
Main Results:
- PPAR-alpha deficient mice showed significantly fewer and less developed endometriotic crypts (10% vs 50% in controls).
- Neo-vascularization was significantly limited in PPAR-alpha null animals (p=0.034).
- Fibroblastic activity was significantly reduced in PPAR-alpha deficient mice (p=0.022).
Conclusions:
- Loss of PPAR-alpha receptors alters the pathology of surgically induced endometriosis.
- PPAR-alpha receptors play a significant role in endometriosis progression.
- PPAR-alpha receptors represent a promising therapeutic target for endometriosis treatment.
