Abstract Title:

Magnesium reduces carotid intima-media thickness in a mouse model of pseudoxanthoma elasticum: a novel treatment biomarker.

Abstract Source:

Clin Transl Sci. 2012 Jun ;5(3):259-64. PMID: 22686203

Abstract Author(s):

Erine A Kupetsky-Rincon, Qiaoli Li, Jouni Uitto

Article Affiliation:

Department of Dermatology and Cutaneous Biology, Thomas Jefferson University, Philadelphia, Pennsylvania, USA. erine.kupetsky-rincon@jefferson.edu

Abstract:

Pseudoxanthoma elasticum (PXE), which demonstrates progressive build-up of calcium phosphate and proteoglycan deposits in skin, eye, and arteries, has been associated with myocardial infarctions, stroke, and blindness. In a mouse model of PXE, a magnesium-enriched diet prevents mineralization of the vibrissae capsule, an early biomarker for PXE. However, biomarkers for therapeutic responses in PXE have not been identified in humans. Because PXE patients have an increased carotid intima-media thickness (CIMT), a risk factor for cardiovascular disease and stroke, we analyzed the feasibility of CIMT as a treatment endpoint before and after magnesium supplementation in a mouse model of PXE (Abcc6(-/-) ). CIMT was measured in 1-year-old Abcc6(-/-) and Abcc6(+/+) mice fed either standard rodent diet with or without magnesium oxide supplementation for 2 months. Baseline CIMT in Abcc6(-/-) versus Abcc6(+/+) mice was increased (p value = 0.009), whereas CIMT in magnesium-treated versus untreated Abcc6(-/-) mice was reduced (p value = 0.024). CIMT is a novel treatment endpoint in this mouse model and may serve as a predictive biomarker of therapeutic response in PXE patients. In that context, magnesium oxide significantly reduced CIMT in PXE mice, and may be useful for disease prevention in PXE patients.

Study Type : Animal Study

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