Abstract:
:Experimental lathyrism was induced by feeding newborn chicks a diet containing 0.2 and 0.4% DL-Penicillamine, with or without CuSO4 (10 mg/Kg diet) and Vitamin B6 (100 mg/Kg diet), or 0.015 and 0.1% beta-aminopropionitrile fumarate (beta-APN). After 7, 15, 25 and 55 days of treatment the animals were killed, the aortas removed and processed for electron microscopy in the presence of markers for proteoglycans, and the elastic fibers were carefully examined. Penicillamine, which prevents the formation of desmosine crosslinks by binding to precursors, induced the production of numerous new elastin fibers which appeared normal from the ultrastructural point of view. It seems, therefore, that at least in chick aortas, desmosine crosslinks are not necessary for the aggregation of tropoelastin molecules into structurally normal fibers. On the contrary, beta-APN, a classical inhibitor of lysyl oxidase, induced the tropoelastin molecules to aggregate into abnormal protuberances on the old fibers. Moreover, the elastin deposited during beta-APN treatment was always permeated by cytochemically revealed proteoglycans, which were never observed after penicillamine treatment. It is speculated that, at least in the system under study, the epsilon-amino groups of tropoelastin molecules may offer the binding sites for matrix proteoglycans until they are removed by lysyl oxidase, and that matrix proteoglycans might play a role in elastin fibrogenesis by preventing spontaneous tropoelastin aggregation in areas far from growing elastin fibers.
journal_name
Connect Tissue Resjournal_title
Connective tissue researchauthors
Ronchetti IP,Contri MB,Fornieri C,Quaglino D Jr,Mori Gdoi
10.3109/03008208509015021subject
Has Abstractpub_date
1985-01-01 00:00:00pages
159-67issue
2eissn
0300-8207issn
1607-8438journal_volume
14pub_type
杂志文章abstract::Oriented fibers, arising from the self assembly of collagen, may be produced from in vitro fibrillogenesis of soluble collagen with gradients of fibrillogenic potential. These gradients may be introduced by either concentration gradients of pronase-treated collagen or of arginine which, in turn, create concentration g...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008208808992792
更新日期:1988-01-01 00:00:00
abstract::Idiopathic pulmonary fibrosis (IPF) is associated with aberrant repair, persistence of collagen deposition, and the development of vascular remodeling. However, the role of angiogenesis in the pathogenesis of IPF is still undetermined. The aim of this study was to evaluate the combined mRNA expression of vascular endo...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008200903056150
更新日期:2010-01-01 00:00:00
abstract::The resorption of devitalized bone by isolated osteoclasts in culture was studied by scanning electron microscopy. Osteoclasts attached to the bone and resorbed mineral but left most of matrix collagen undigested in the resorption pits. Postculture-treatment of bone substrate with collagenase completely removed the ma...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008208909023885
更新日期:1989-01-01 00:00:00
abstract::The interaction of sodium dodecyl sulfate with elastin has been studied by complexometric titration. Approximately 1.2 mumoles of protons with a pKapp of 5.45 are taken up by 10 milligrams of insoluble elastin upon the binding of detergent, apparently due to the protonation of normally ionized carboxylate functions in...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008207809152627
更新日期:1978-01-01 00:00:00
abstract::Volume and morphology of chondrocytes in osteoarthritic human hip joint articular cartilage were characterized, and their relationship to tissue structure and function was determined. Human osteochondral articular cartilage samples (n=16) were obtained from the femoral heads of nine patients undergoing total hip arthr...
journal_title:Connective tissue research
pub_type: 临床试验,杂志文章
doi:10.3109/03008207.2014.912645
更新日期:2014-08-01 00:00:00
abstract::Bone sialoprotein (BSP) expression is restricted to cells associated with the mineralization of bones and teeth. We previously identified a homeodomain binding element in a 2.5 kb fragment of the murine Bsp promoter that is required for osteoblast-selective expression in cell culture. To examine the role of this eleme...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:
更新日期:2003-01-01 00:00:00
abstract::Since cartilage is mainly an avascular tissue, chondrocytes exist in a low-level oxygen environment in vivo. In the present study, we investigated the effect of oxygen tension (20%, 5% and 1% gas phase oxygen concentrations) over a 20-day period on the extracellular matrix accumulation of bovine articular chondrocytes...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008200109014251
更新日期:2001-10-01 00:00:00
abstract::The diameter of collagen fibrils has been measured in electron micrographs of the tunica media and adventitia of the common carotid artery of 14 rats (19,262 counts). The fibrils of the media were measured in each of its three interlamellar spaces. The mean fibril diameters in the innermost space and the middle space ...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008208709002000
更新日期:1987-01-01 00:00:00
abstract::An extensive literature on bone morphogenetic protein (BMP) induced generation and regeneration shows general agreement about one observation. The incidence and quantity of bone were greatest when BMP was delivered with a carrier of various biologic and non biologic polymers. In the present research, neutral lipids ei...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008209709160210
更新日期:1997-01-01 00:00:00
abstract::The fibrous collagens form the structural basis of all mammalian connective tissues, including the vasculature, dermis, bones, tendons, cartilage, and those tissues that support organs such as the heart, kidneys, liver, and lungs. The helical structure of collagen has been extensively studied but in addition to its he...
journal_title:Connective tissue research
pub_type: 杂志文章,评审
doi:10.3109/03008207.2010.511353
更新日期:2011-02-01 00:00:00
abstract::We have investigated the changes in some of the biochemical and biophysical properties of human femoral head cartilage on the one hand during ageing and on the other hand in osteoarthritis. Topographical variations were also investigated. The parameters studied were those relevant to cartilage function, viz., proteogl...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008208909043895
更新日期:1989-01-01 00:00:00
abstract::The oxidation of an elastin substrate by highly purified bovine aortic lysyl oxidase (LO) is markedly influenced by amphiphilic molecules known to bind to elastin. Negatively charged elastin ligands, including fatty acids, bile salts or sodium dodecyl sulfate can completely inhibit the oxidation of lysine in elastin, ...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008208109152378
更新日期:1981-01-01 00:00:00
abstract::Transforming growth factor beta (TGF-beta) is a ubiquitous regulator of cellular growth and differentiation. The present study investigated the effects of TGF-beta on chick growth plate chondrocyte proliferation, matrix synthesis, and alkaline phosphatase activity in short term cultures. TGF-beta markedly stimulated D...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008208909023900
更新日期:1989-01-01 00:00:00
abstract::Epithelial-mesenchymal interactions are required for tissue growth and gene expression patterns during odontogenesis. We showed previously that Sonic hedgehog (SHH) is detectable in both dental epithelium and mesenchyme, while Shh transcripts are present in dental epithelium only, suggesting that SHH functions as an a...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:
更新日期:2003-01-01 00:00:00
abstract::The expression of matrix metalloproteinases (MMPs) and their inhibitors (TIMPs) by human vascular smooth muscle cells (SMC) was monitored as a function of the phenotypic modulation in vitro. Cell phenotype was manipulated by varying serum concentration and cell density. Synthetic phenotype was characterized by a minim...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008200009067666
更新日期:2000-01-01 00:00:00
abstract::Odontogenesis involves a complex series of processes including epithelial-mesenchymal interactions, morphogenesis, differentiation, fibrillogenesis, and mineralization. Extracellular (ECM) remodeling plays a critical role in the rapid morphological changes that accompany these events. It is proposed that matrix metall...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.1080/03008200290000538
更新日期:2002-01-01 00:00:00
abstract::Part of the hyaluronic acid (HA) synthesized in peripheral tissues enters the blood circulation through the lymph. It is rapidly taken up by the endothelial cells in the liver (half-life in blood is 2.5-5.5 minutes) and degraded. Pure primary cultures of liver endothelial cells were obtained by a newly developed techn...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008208609001971
更新日期:1986-01-01 00:00:00
abstract::The efficacy of connective tissue explants is difficult to determine, particularly where autopsy material is required for research or clinical applications. We report here an optimised protocol using 5-chloromethylfluorescein diacetate (CMFDA) and ethidium homodimer-1 to distinguish viable and non-viable cells in a ra...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008209609028880
更新日期:1996-01-01 00:00:00
abstract::White Carneau pigeons have previously been shown to be genetically susceptible to the development of spontaneous atherogenesis. The severity of development of atheromatous lesions is considerably greater than a more resistant breed of Show Racer pigeons. Analysis of levels of total hydroxyproline and isodesmosine in t...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008209009009813
更新日期:1990-01-01 00:00:00
abstract::To elucidate the mechanism of accumulation and fragmentation of hyaluronic acid (HA) under inflammatory conditions, we investigated the effect of proinflammatory cytokines on hyaluronic acid synthetase (HAS) mRNA expression using cultured rabbit synovial membrane cells. HASs mRNA levels were determined by real-time PC...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008200109005649
更新日期:2001-01-01 00:00:00
abstract::Periosteal explants obtained from rabbit calvariae are introduced as a model system to study contraction of soft connective tissue. Culturing of these explants resulted in a substantial time-dependent decrease of the surface area which coincided with a similar decrease in volume. A 75% reduction of the initial explant...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008209509028402
更新日期:1995-01-01 00:00:00
abstract::To investigate the source of bone brittleness in the disease osteogenesis imperfecta (OI), biomechanical properties have been measured in the femurs from a homozygous (oim/oim) mutant mouse model of OI, its heterozygous littermates, and wild-type animals. The novel technique of ultrasound critical-angle reflectometry ...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008209909005282
更新日期:1999-01-01 00:00:00
abstract::Anterior cruciate ligament (ACL) has poor healing ability and an injured ACL would induce the degeneration of other intra-articular connective tissues. However, the coordinated expression and activities of matrix metalloproteinase (MMPs) in intra-articular tissues induced by ACL rupture were poorly understood. With a ...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:
更新日期:2009-01-01 00:00:00
abstract::Solutions of type I acid soluble collagen were studied in light and electron microscopy at concentrations over 40 mg/ml. Banded patterns spontaneously emerge in samples observed between crossed polars between slide and coverslip. The textures are interpreted as precholesteric, appearing at the transition between the i...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008209809002438
更新日期:1998-01-01 00:00:00
abstract::In orthodontic tooth movement, prostaglandin E(2) (PGE(2)) released from osteoblasts can alter the normal process of bone remodeling. We examined the effect of compressive force (CF) on PGE(2) production, PGE receptors (Ep1-4) expression, phosphorylation of protein kinase A (p-PKA), and calcium content in Saos-2 cells...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.1080/03008200701541775
更新日期:2007-01-01 00:00:00
abstract::The composition of glycosaminoglycans (GAGs) was analyzed in skin samples of eight patients suffering from localized scleroderma, i.e., three having generalized morphoea and five localized morphoea plaques. From each patients, biopsies were obtained from sclerotic and perilesional areas, and from clinically uninvolved...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008208509152402
更新日期:1985-01-01 00:00:00
abstract::Radiation therapy is one of the routine treatment modalities for cancer patients. Ionizing radiation (IR) can induce bone loss, and consequently increases the risk of fractures with delayed and nonunion of the bone in the cancer patients who receive radiotherapy. The orchestrated bone remodeling can be disrupted due t...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.1080/03008207.2018.1439482
更新日期:2018-11-01 00:00:00
abstract::A theoretical expression has been derived for the mean collagen fibril length in tendon based on the assumption that collagen fibrils originate in cell surface invaginations and terminate either at some remote cell surface or another collagen fibril bundle. The expression thus determined requires knowledge of the effe...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008208909016814
更新日期:1989-01-01 00:00:00
abstract::This study examines the similarities and differences in the noncollagenous domain (NC1) of type IV collagen from human glomerular basement membrane (hGBM), alveolar basement membrane (hABM), and placenta (hPBM). Following collagenase digestion, NC1 domain was isolated on Bio-Gel A-0.5m or by cation exchange chromatogr...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008209009152156
更新日期:1990-01-01 00:00:00
abstract::Raman spectra have been determined for hyaluronan, chondroitin-4-sulfate, chondroitin-6-sulfate, aggrecan monomers and aggregates. The nature of the saccharides and the pattern of sulfation can be discerned. There were only small spectral changes with pH and ionic composition. Differences between hydroxyl vibrations, ...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.1080/03008200802398422
更新日期:2009-01-01 00:00:00