Abstract
Miscarriage caused by Gram-negative bacteria infecting the female genital tract is one of the most common complications of human pregnancy. Intraperitoneal administration of LPS to 7-days pregnant mice induces embryo resorption after 24 h. Here, we show that LPS induced apoptosis on uterine explants from 7-days pregnant mice and that CB1 receptor was involved in this effect. On the other hand, heparin has been widely used for the prevention of pregnancy loss in women with frequent miscarriage with or without thrombophilia. Besides its anticoagulant properties, heparin exerts anti-inflammatory, immunomodulatory and anti-apoptotic effects. Here, we sought to investigate whether the administration of heparin prevented LPS-induced apoptosis in uterine explants from 7-days pregnant mice. We found that heparin enhanced cell survival in LPS-treated uterine explants and that this effect was mediated by increasing uterine FAAH activity. Taken together, our results point towards a novel mechanism involved in the protective effects of heparin.
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Abbreviations
- AA:
-
Arachidonic acid
- AEA:
-
Anandamide
- CB1:
-
Cannabinoid receptor type 1
- CB2:
-
Cannabinoid receptor type 2
- eCS:
-
Endocannabinoid system
- FAAH:
-
Fatty acid amide hydrolase
- IL:
-
Interleukin
- LMWH:
-
Low molecular weight heparins
- LPS:
-
Lipopolysaccharide
- m-AEA:
-
R(+)-methanandamide
- PBMC:
-
Peripheral blood mononuclear cells
- TUNEL assay:
-
Terminal deoxynucleotidyl transferase-mediated dUTP-biotin DNA-nick end labeling assay
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Acknowledgments
We thank Ramona Morales and Maximiliano Cella for their excellent technical support. This work was supported by Agencia Nacional para la Promoción Científica y Tecnológica (PICT 2010/0813 and PICT 2013/0097), Consejo Nacional de Investigaciones Científicas y Técnicas (PIP 2012/0061). Finally, we would like to thank the animal care technicians Vet. Marcela Márquez and Daniel González for their excellent care of the animals used in this study.
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Salazar, A.I., Vercelli, C., Schiariti, V. et al. Heparin exerts anti-apoptotic effects on uterine explants by targeting the endocannabinoid system. Apoptosis 21, 965–976 (2016). https://doi.org/10.1007/s10495-016-1269-7
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DOI: https://doi.org/10.1007/s10495-016-1269-7