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Microfibril-associated glycoproteins MAGP-1 and MAGP-2 in disease
Clarissa S Craft1, Thomas J Broekelmann2, Robert P Mecham2
1Division of Bone and Mineral Research, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, United States.
Abstract:
Microfibril-associated glycoproteins 1 and 2 (MAGP-1, MAGP-2) are protein components of extracellular matrix microfibrils. These proteins interact with fibrillin, the core component of microfibrils, and impart unique biological properties that influence microfibril function in vertebrates. MAGPs bind active forms of TGFβ and BMPs and are capable of modulating Notch signaling. Mutations in MAGP-1 or MAGP-2 have been linked to thoracic aneurysms and metabolic disease in humans. MAGP-2 has also been shown to be an important biomarker in several human cancers. Mice lacking MAGP-1 or MAGP-2 have defects in multiple organ systems, which reflects the widespread distribution of microfibrils in vertebrate tissues. This review summarizes our current understanding of the function of the MAGPs and their relationship to human disease.
Insights
Microfibril-associated glycoproteins 1 and 2 (MAGP-1, MAGP-2) are vital extracellular matrix proteins influencing microfibril function. Their dysfunction is linked to human diseases, including aneurysms, metabolic disorders, and cancer.
Area of Science:
- Biochemistry
- Molecular Biology
- Cell Biology
Background:
- Microfibril-associated glycoproteins 1 and 2 (MAGP-1, MAGP-2) are key components of extracellular matrix microfibrils.
- These proteins interact with fibrillin, influencing microfibril structure and function in vertebrates.
Purpose of the Study:
- To review the current understanding of MAGP-1 and MAGP-2 functions.
- To explore the relationship between MAGPs and human diseases.
Main Methods:
- Literature review of studies on MAGP-1 and MAGP-2.
- Analysis of genetic mutations and their associated phenotypes.
- Examination of MAGP-2 as a cancer biomarker.
Main Results:
- MAGPs bind TGFβ and BMPs, modulating Notch signaling.
- Mutations in MAGP-1/MAGP-2 are associated with thoracic aneurysms and metabolic diseases.
- MAGP-2 is a potential biomarker in human cancers.
- MAGP-1/MAGP-2 deficient mice exhibit multi-organ system defects.
Conclusions:
- MAGPs play critical roles in diverse biological processes.
- Dysregulation of MAGPs contributes to various human pathologies.
- Further research into MAGPs may yield new therapeutic strategies and diagnostic tools.
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