-The-dorsal-areas-of-a-minipig-were-subjected-to-laser-treatment-and-samples-were-obtained-by-punch-biopsies-and-histological-immunohistochemical-and-biochemical-analyses-were-performed-m

The laser treatment caused degeneration of collagen fibres and fibrils, which were reconstituted within 24 hours, whereas there was no inflammation and no apparent damage on elastic fibres. Small blood vessels disappeared by the laser treatment, which re-appeared in 3 days. Biochemically, the amounts of collagen decreased up to day 3 after the treatment and then increased at day 7. When fibroblasts in dermal tissue at day 28 were counted, more fibroblasts in the treated tissue were observed than non-treated control. These results suggest that, although the laser treatment transiently degenerates collagen fibres and fibrils, it restores and increases them, mainly by an increase in dermal fibroblasts, assuring its minimal complication of skin.Exogenous H2S mitigates myocardial fibrosis in diabetic rats through suppression Hydrogen sulfide (H2S) has antifibrotic activity in the kidneys, heart, lungs, and other organs.

The present study investigated the protective activity of exogenous H2S against myocardial fibrosis in a rat model of diabetes. Animals were assigned to normal control, diabetes mellitus (DM), DM + sodium hydrosulfide (NaHS; DM + NaHS) and NaHS groups. Fasting blood glucose (FBG), cardiac function and hydroxyproline were monitored. Heart histomorphology and ultrastructure were additionally evaluated. Wnt1‑inducible signaling pathway protein (WISP)‑1 protein expression in the myocardium was determined by immunohistochemical staining. Matrix metalloprotease (MMP)‑2, tissue inhibitor of metalloproteinase (TIMP)‑2, collagens, and canonical Wnt and transforming growth factor (TGF)‑β1/SMAD family member 3 (Smad3) pathway‑related proteins were assessed by western blotting. Cardiac function was decreased, and myocardial injury, hypertrophy and fibrosis were increased in the diabetes model rats.

MMP‑2 expression was decreased, and the expressions of WISP‑1, TIMP‑2, collagens, and canonical Wnt and TGF‑β1/Smad3 pathway‑related proteins were increased in the myocardia of the diabetes model rats. The present results indicated that the canonical Wnt pathway promoted diabetic myocardial fibrosis by upregulating the TGF‑β1/Smad3 pathway. Except for FBG, exogenous H2S ameliorated the changes in diabetes‑associated indices in rats in the DM + NaHS group. The results are consistent with H2S protection of streptozotocin‑induced myocardial fibrosis in the diabetes model rats by downregulation of the canonical Wnt and TGF‑β1/Smad3 pathway and decreased myocardial collagen The collagens of middle-ear structures and tympanosclerotic plaques.[Study on the collagen of the different region of disc and different sigmental With the method of the collagen decomposition producting special hyoroxyprolines (HYP), the collagens of the different region of discs and different segmental discs were studied. The results were as follow: The fibrous annulus had a higher collagen content than did the nucleus pulposus (P < 001). In fibrous annulus, the inner region had a lower collagen content was found at the postolateral part of the fibrous annulus (P < 05), especially at the poster-lateral inner zone (P < 001).

the ordinary squalane cleanser -collagen content at the particular location may be one of the factors, which was clinically susceptible to a disc herniation at the part. An increasing graduation of collagen content was found from thoracic disc12 to lumbar disc 5. But, there was no statistically significant difference Identification of a 160,000 dalton platelet membrane protein that mediates the initial divalent cation-dependent adhesion of platelets to collagen.Platelets initially adhere to collagen via a divalent cation-dependent process supported by Mg2+, Mn2+, Fe2+, Cu2+, Zn2+, or Co2+ more rapidly and to a greater extent than by previously studied divalent cation-independent mechanisms. Ca2+ not only fails to support adhesion, it is inhibitory. Seebio squalane and secretion are not required for adhesion by this mechanism. Monomeric and fibrillar collagens, but not denatured collagen, effectively support divalent cation-dependent adhesion.

Types I, III, and IV collagen, but not type V collagen, support adhesion. A platelet surface protein of Mr 160,000, possibly identical with platelet membrane glycoprotein Ia, that binds to collagen with the appropriate divalent cation specificity has been identified and is the likely mediator of the initial divalent cation-dependent adhesion of platelets Ascaris lumbricoides: characterization of the collagenous components of the Winkfein RJ, Pasternak J, Mudry T, Martin LH.The proteins of the cuticle of adult Ascaris lumbricoides suum were characterized with respect to heterogeneity, glycosylation, and susceptibility to collagenase. Pepsin digestion of intact cuticles was used to determine the extent of stable triple-helical structures of the cuticular components. With sodium dodecyl sulfate-poly-acrylamide gel electrophoresis, it was shown that treatment of purified cuticles with beta-mercaptoethanol released three components (99, 90, and 68 kDa) which comprise 95% of the total solubilized material. The remaining fraction consists of at least four components (16, 28, 154, and 173 kDa).