Collagen VI Regulates Peripheral Nerve Myelination and Function Scientists showed that Schwann cells, but not axons, contribute to collagen VI deposition in peripheral nerves. By using Col6a1-null mice, in which collagen VI deposition is compromised, they demonstrated that lack of collagen VI leads to increased myelin thickness along with 60-130% up-regulation in myelin-associated proteins and disorganized C fibers in the peripheral nervous system. [FASEB J] Abstract Extracellular Matrix Remodeling by Bone Marrow Fibroblast-Like Cells Correlates with Disease Progression in Multiple Myeloma Researchers performed a comparative proteome profiling study, analyzing primary human fibroblast-like cells isolated from the bone marrow of multiple myeloma (MM), monoclonal gammopathy of undetermined significance (MGUS), as well as of non-neoplastic control patients. [J Proteome Res] Abstract Large-Scale Investigation of Leishmania Interaction Networks with the Host Extracellular Matrix by Surface Plasmon Resonance Imaging Investigators have set up an assay to study interactions of live pathogens with their host using protein and glycosaminoglycan arrays probed by surface plasmon resonance imaging and they have used this assay to characterize the interaction of Leishmania promastigotes with ~70 mammalian host biomolecules (extracellular proteins, glycosaminoglycans, growth factors, cell surface receptors). [Infect Immun] Abstract A Novel In Vitro Model for Microvasculature Reveals Regulation of Circumferential ECM Organization by Curvature Researchers exploit a 3D fibrin microfiber scaffold to develop a novel in vitro model of the microvasculature that recapitulates endothelial alignment and extracellular matrix (ECM) deposition in a setting that also allows the sequential co-culture of mural cells. They showed that the microfibers’ nanotopography induces longitudinal adhesion and alignment of endothelial colony-forming cells, and that these deposit circumferentially organized ECM. [PLoS One] Full Article Triple Combination of siRNAs Targeting TGFβ1, TGFβR2 and CTGF Enhances Reduction of Collagen I and Smooth Muscle Actin in Corneal Fibroblasts Scientists developed an anti-fibrotic treatment targeting three critical scarring genes, Transforming Growth Factor β1 (TGFβ1), TGFβ receptor (TGFβR2) and Connective Tissue Growth Factor (CTGF), using a combination of siRNAs and assessed its effect on downstream scarring genes, Collagen-I and alpha smooth muscle actin. [Invest Ophthalmol Vis Sci] Abstract Mechanical Recruitment of N- and C-Crosslinks in Collagen Type I The authors observed that the N-crosslink served as the first responder to mechanical deformation, followed by the C-crosslink. The results of their simulations suggest a mechanical recruitment mechanism for N- and C-crosslinks. Understanding this mechanism will be crucial for the development of larger-scale predictive models of the mechanical behavior of native collagenous tissues, engineered tissues, and collagen-based materials. [Matrix Biol] Abstract Distribution of Extracellular Matrix Macromolecules in the Vestibular Nuclei and Cerebellum of the Frog, Rana esculenta Using histochemical and immunohistochemical methods, the authors investigated the distribution pattern of chondroitin sulfate proteoglycans, tenascin-R, and hyaluronan in the medial, lateral, superior and descending vestibular nuclei and cerebellum of the frog and detected regional differences in the organization of the extracellular matrix. [Neuroscience] Abstract Small Leucine Rich Proteoglycans Exhibit Unique Spatiotemporal Expression Profiles during Cardiac Valve Development Small Leucine Rich Proteoglycans (SLRPs) play a role in collagen fiber formation and also function as signaling molecules. Given the importance of collagen synthesis to the cardiovascular extracellular matrix, scientists examined the spatiotemporal expression of SLRPs, not previously investigated in the murine heart. [Dev Dynam] Abstract |