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Nanomechanical phenotype of chondroadherin-null murine articular cartilage.
We used atomic force microscopy (AFM)-based nanoindentation to quantify the effects of CHAD deletion on changes in the biomechanical function of murine cartilage. In comparison to wild-type (WT) mice, CHAD-deletion resulted in a significant ≈70-80% reduction in the indentation modulus, Eind, of the...
Announcement - MBE Meeting.
Pathophysiology of the microfibril/elastic fiber system: introduction
Human perlecan immunopurified from different endothelial cell sources has different adhesive properties for vascular cells.
Perlecan, a major heparan sulfate proteoglycan of vascularized tissues, was immunopurified from media conditioned by human endothelial cells of both arterial and venous origin. The heparan sulfate moiety of perlecan from cultured arterial cells differed in amount and/or composition from that produce...
The hinge region of type VII collagen is intrinsically disordered.
We investigated a heterologous expressed peptide by CD and NMR spectroscopy. CD spectroscopy implies that the hinge region is intrinsically disordered. Resonance assignment was performed and allowed secondary structure analysis based on the chemical shift values. Seven amino acids in the N-terminal...
Heparan sulfate 3-O-sulfation: a rare modification in search of a function.
I herpes simplex virus. In mammals, a family of seven heparan sulfate 3-O-sulfotransferases installs sulfate groups at this position and constitutes the largest group of sulfotransferases involved in heparan sulfate formation. However, to date very few proteins or biological systems have been descri...
Enhanced deposition of cartilage oligomeric matrix protein is a common feature in fibrotic skin pathologies
We recently demonstrated that cartilage oligomeric matrix protein (COMP) functions as organizer of the dermal collagen I network in healthy human skin (Agarwal et al., 2012). Here we show that COMP deposition is enhanced in the dermis in various fibrotic conditions. COMP levels were significantly in...
Dermatopontin promotes adhesion, spreading and migration of cardiac fibroblasts in vitro.
We evaluated the expression pattern of DPT mRNA and protein as well as its secretion in cultured neonatal rat cardiomyocytes (CMs) and cardiac fibroblasts (CFs) under conditions of hypoxia and serum deprivation (hypoxia/SD). Further, we tested the possible roles of DPT in CFs adhesion, spreading, mi...
Quantification of type II procollagen splice forms using alternative transcript-qPCR (AT-qPCR).
We show that this widely used method is inaccurate due to mismatched amplification efficiency of different-sized PCR products. We have developed the TaqMan®-based AT-qPCR (Alternative Transcript-qPCR) assay to more accurately quantify alternatively spliced mRNA, and demonstrate the measurement of Co...
Tumor suppression by collagen XV is independent of the restin domain.
We previously showed that collagen XV functions as a dose-dependent suppressor of tumorigenicity in cervical carcinoma cells. The carboxyl terminus of another non-fibrillar collagen (XVIII) is cleaved to produce endostatin, which has anti-angiogenic effects and thus may act as a tumor suppressor in...