MMP-14 is expressed in preeclamptic placentas and mediates release of soluble endoglin

Kaitu'u-Lino, Tu'uhevaha J., Palmer, Kirsten R., Whitehead, Clare L., Williams, Elizabeth D., Lappas, Martha, & Tong, Stephen (2012) MMP-14 is expressed in preeclamptic placentas and mediates release of soluble endoglin. The American Journal of Pathology, 180(3), pp. 888-894.

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Soluble endoglin is an anti-angiogenic protein that is released from the placenta and contributes to both maternal endothelial dysfunction and the clinical features of severe preeclampsia. The mechanism through which soluble endoglin is released from the placenta is currently unknown; however, recent work in colorectal cancer identified matrix metalloproteinase 14 (MMP-14) as the cleavage protease of endoglin. To determine whether this is also the mechanism responsible for soluble endoglin release in preeclampsia, we investigated the expression of MMP-14 within the placenta and the effects of its inhibition on soluble endoglin release. Placentas were obtained from severe, early onset preeclamptic pregnancies (n = 8) and gestationally matched preterm controls (n = 8). MMP-14 was predominately localized to the syncytiotrophoblast. Results from a proximity ligation assay showed protein interactions between endogenous MMP-14 and endoglin within the preeclamptic placenta. To demonstrate that this interaction produces soluble endoglin, we treated trophoblastic BeWo cells with either a broad-spectrum MMP inhibitor (GM6001) or MMP-14 siRNA. Both treatments produced a decrease in soluble endoglin (P ≤ 0.05). Treatment of mice bearing BeWo xenografts with GM6001 decreased circulating soluble endoglin levels in mouse serum (P ≤ 0.05). These findings indicate that MMP-14 is the likely cleavage protease of endoglin in the setting of preeclampsia. This approach provides a novel method for the development of potential therapeutics to reduce circulating soluble endoglin and ameliorate the clinical features of severe preeclampsia.

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ID Code: 77750
Item Type: Journal Article
Refereed: Yes
Keywords: MMP-14, Preeclampsia, Placenta, soluble endoglin, maternal endothelial dysfunction
DOI: 10.1016/j.ajpath.2011.11.014
ISSN: 0002-9440
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > PAEDIATRICS AND REPRODUCTIVE MEDICINE (111400) > Obstetrics and Gynaecology (111402)
Divisions: Current > Schools > School of Biomedical Sciences
Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2012 American Society for Investigative Pathology
Deposited On: 16 Oct 2014 06:13
Last Modified: 17 Oct 2014 04:15

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