Matrix Metalloproteinases Contribute to the Calcification Phenotype in Pseudoxanthoma Elasticum

Ectopic calcification and dysregulated extracellular matrix remodeling are prominent hallmarks of the complex heterogenous pathobiochemistry of pseudoxanthoma elasticum (PXE). The disease arises from mutations in ABCC6, an ATP-binding cassette transporter expressed predominantly in the liver. Neither its substrate nor the mechanisms by which it contributes to PXE are completely understood. The fibroblasts isolated from PXE patients and Abcc6-/- mice were subjected to RNA sequencing. A group of matrix metalloproteinases (MMPs) clustering on human chromosome 11q21-23, respectively, murine chromosome 9, was found to be overexpressed. A real-time quantitative polymerase chain reaction, enzyme-linked immunosorbent assay and immunofluorescent staining confirmed these findings. The induction of calcification by CaCl2 resulted in the elevated expression of selected MMPs. On this basis, the influence of the MMP inhibitor Marimastat (BB-2516) on calcification was assessed. PXE fibroblasts (PXEFs) exhibited a pro-calcification phenotype basally. PXEF and normal human dermal fibroblasts responded with calcium deposit accumulation and the induced expression of osteopontin to the addition of Marimastat to the calcifying medium. The raised MMP expression in PXEFs and during cultivation with calcium indicates a correlation of ECM remodeling and ectopic calcification in PXE pathobiochemistry. We assume that MMPs make elastic fibers accessible to controlled, potentially osteopontin-dependent calcium deposition under calcifying conditions.

Medienart:

E-Artikel

Erscheinungsjahr:

2023

Erschienen:

2023

Enthalten in:

Zur Gesamtaufnahme - volume:13

Enthalten in:

Biomolecules - 13(2023), 4 vom: 12. Apr.

Sprache:

Englisch

Beteiligte Personen:

Plümers, Ricarda [VerfasserIn]
Lindenkamp, Christopher [VerfasserIn]
Osterhage, Michel Robin [VerfasserIn]
Knabbe, Cornelius [VerfasserIn]
Hendig, Doris [VerfasserIn]

Links:

Volltext

Themen:

106441-73-0
Abcc6
Abcc6 protein, mouse
Calcification
Calcium
D5EQV23TDS
EC 3.4.24.-
Journal Article
Marimastat
Matrix Metalloproteinases
Matrix metalloproteinase
Multidrug Resistance-Associated Proteins
Osteopontin
Pseudoxanthoma elasticum
SY7Q814VUP

Anmerkungen:

Date Completed 17.05.2023

Date Revised 07.09.2023

published: Electronic

Citation Status MEDLINE

doi:

10.3390/biom13040672

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM356920712