Elevated inflammatory gene expression in intervertebral disc tissues in mice with ADAM8 inactivated
Autor: | Yejia Zhang, Maurizio Pacifici, Gabriella Cs-Szabo, Zuozhen Tian, Ling Qin, Motomi Enomoto-Iwamoto, David Gerard, Frances S. Shofer, Lutian Yao |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
0301 basic medicine
Cell biology Proteolysis Science Mutant Gene Expression Diseases Pathogenesis Degeneration (medical) Article 03 medical and health sciences Mice 0302 clinical medicine Antigens CD medicine Animals Intervertebral Disc chemistry.chemical_classification Inflammation Multidisciplinary medicine.diagnostic_test Wild type Membrane Proteins Intervertebral disc Molecular biology Mice Mutant Strains CXCL1 ADAM Proteins 030104 developmental biology medicine.anatomical_structure Enzyme chemistry Medicine ADAM8 030217 neurology & neurosurgery |
Zdroj: | Scientific Reports, Vol 11, Iss 1, Pp 1-11 (2021) Scientific Reports |
ISSN: | 2045-2322 |
Popis: | We found ADAM8 enzymatic activity elevated in degenerative human intervertebral disc (IVD). Here, we examined the discs in ADAM8-inactivation mice that carry a mutation preventing self-activation of the enzyme. Surprisingly, elevated gene expression for inflammatory markers (Cxcl1, IL6) was observed in injured discs of ADAM8 mutant mice, along with elevated expression of type 2 collagen gene (Col2a1), compared with wild type controls. Injured annulus fibrosus of mutant and wild type mice contained a higher proportion of large collagen fibers compared with intact discs, as documented by microscopic examination under circular polarized light. In the intact IVDs, Adam8EQ mouse AF contained lower proportion of yellow (intermediate) fiber than WT mice. This suggests that ADAM8 may regulate inflammation and collagen fiber assembly. The seemingly contradictory findings of elevated inflammatory markers in mutant mice and excessive ADAM8 activity in human degenerative discs suggest that ADAM8 may interact with other enzymatic and pro-inflammatory processes needed for tissue maintenance and repair. As a future therapeutic intervention to retard intervertebral disc degeneration, partial inhibition of ADAM8 proteolysis may be more desirable than complete inactivation of this enzyme. |
Databáze: | OpenAIRE |
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