chains, can make purification challenging and structural analysis painful. Their ability to bind scores of growth factors, growth factor-binding proteins, extracellular proteases, protease inhibitors, extracellular matrix molecules, and other proteins takes the concept of molecular promiscuity to new heights. On top of this, they seem always to be underfoot, showing up on plasma membranes in hu...

Cultured chondrocytes from the Swarm rat chondrosarcoma incorporate [35S]sulfate into proteoglycans typical of hyaline cartilage. The movement of newly synthesized proteoglycans from inside the cells into the extracellular matrix and, finally, into the culture medium was examined by measuring the distribution of 35S-labeled proteoglycans in the medium, a 4 M guanidine HCl extract of the cell la...

The effect of p-nitrophenyl-beta-D-xylopyranoside on glomerular extracellular matrices (glomerular basement membrane and mesangial matrix) proteoglycans was studied. The proteoglycans of rat kidneys were labeled with [35S]sulfate in the presence or absence of beta-xyloside (2.5 mM) by using an isolated organ perfusion system. The proteoglycans from the glomeruli and perfusion medium were isolat...

Monomer proteoglycan was isolated from porcine ovarian follicular fluid by isopycnic CsCl centrifugation in the presence of 4 M guanidine HCl and protease inhibitors. The elution profile of the D1 preparation on Sepharose 2B was similar to that of monomer proteoglycan from bovine nasal cartilage, indicating a similar molecular size. Follicular fluid proteoglycans consist of about 20% protein, 5...

Studies of the involvement of ECM molecules in cell attachment, growth, and differentiation have revealed a central role of heparan sulfate (HS) proteoglycans (HSPGs) in early embryogenesis, morphogenesis, angiogenesis, and epithelial-mesenchymal interactions (1–3). HS chains bind a multitude of proteins and ensure that a wide variety of bioactive molecules (e.g., heparin-binding growth factors...

3D correlation of neutron and X-ray tomographies with micron resolution reveals water diffusion across the bone matrix. • Anosteocytic material is more permeable than osteocytic material. In zebrafish bone, flow appears to be confined lacunar-canalicular network. medaka containes far less proteoglycans. Vertebrate bones are made a nanocomposite consisting water, mineral organics. Water helps wi...

BOOK 7 LAKES PROTEOGLYCANS conference