objective(s) extracellular matrix (ecm) and basement membrane (bm) play important roles in many developmental processes during development and after birth. among the components of the bm, collagen fibers specially type iv are the most important parts. the aim of this study was to determine the time when collagen type iv appears in the bm of lens structure during mouse embryonic development. mat...

abstract basement membrane of glomerular mesangium (bmg) is a thin membrane which helps to support the capillary loops in a renal glomerulus and type iv collagen is require for complete bm formation during glomerulogenesis. in this investigation specific antibody of type iv collagen has been used in light microscopy to study development of bmg of the embryonic and postnatal mouse glomerular mes...

introduction & objective: the brain choroids plexus (bcp) plays an important role in the cerebrospinal fluid (csf) production, but its characterization is still incomplete. collagen type iv, is one of the most important proteins of basement membrane (bm) and extracellular matrix (ecm) of bcp. in the present study we investigated the differential period of type iv collagen in basement membrane o...

background: nicotine can pass through placental blood barrier and accumulate in the developing organs of fetus. also, entering the breast milk, nicotine can have an effect on the neonates. investigations have showed that collagen iv is one of the most important micro vessels basement membrane components. objective:  in this study, the effect of maternal nicotine exposure in pre and postnatal pe...

background: recently, there has been interest in non‑mammalian collagen sources such as fish collagen in the development of biomatrices and scaffolds for periodontal regeneration. in the present study, a novel collagen barrier membrane of fish origin was assessed in the treatment ofperiodontal intra‑bony defects. materials and methods: ten systemically healthy chronic periodontitis patients hav...

Objective— Use of equine autologous keratinocyte on collagen membrane grafts (KCMG) for treatment of wounds in the distal aspect of the horse limb. Design— Experimental study Animals— Four horses. Procedure—Keratinocytes have been separated by enzyme digestion from lib skin sample and proliferated in vitro. Full thickness excision wounds (6.25 cm2) were created on the mid-lateral of both met...

A polypropylene microporous membrane (PPMM) was fabricated by thermally induced phase separation (TIPS) method. The effects of protein size and structure as well as filtration pressure on the membrane performance and fouling mechanisms were investigated using two different proteins, bovine serum albumin (BSA) and collagen, in dead-end filtration setup. Obtained results showed that, for each pro...

statement of problem: the guided bone regeneration (gbr) technique does not always produce consistent results. bone filling within the space provided by the membrane can be incomplete. purpose: the aim of this study was to evaluate the effect of a collagen membrane (bio-gide) in combination with or without deproteinezed bovine bone mineral (bio-oss) on the healing of calvarial defects in rabbit...

background: nanosized ceramics may represent a promising class of bone graft substitutes due to their improved osseointegrative properties. nanocrystalline hydroxyapatite (ncha) bind to bone and stimulate bone healing by stimulation of osteoblast activity. the present study aims to explore the clinical and radiographical outcome of ncha bonegraft (sybograf®) with collagen membrane (periocol®), ...