Collagenolytic enzymes assayed by spectrophotometry with suspensions of reconstituted collagen fibrils.

Abstract:

:Collagenolytic enzymes were quantitated by a method based on spectrophotometry of suspended reconstituted collagen fibrils. To obtain optically stable suspensions it was necessary to perform a short sonication of the aggregated fibrils at 10 degrees C. When fibrils were cleaved with mammalian fibroblast collagenase at 35 degrees C the triple helical collagen fragments (TCA and TCB) would uncoil spontaneously and the decreasing turbidity was used as an estimate of enzyme activity. The method is a specific collagenase assay since a possible cleavage in the non-helical parts of the collagen molecule with contaminating proteinases is without effect on the turbidity of the suspension and the collagen substrate is not converted to gelatin at 35 degrees C. After 1 h of incubation 0.2 U (equivalent to 0.2 micrograms) of fibroblast collagenase could be detected. In purification procedures with microbial collagenases many fractions were tested by overnight incubations in disposable cuvettes. Sealing of cuvettes with square silicone stoppers allowed rotation of enzyme-substrate mixtures directly in the cuvettes. Only standard laboratory equipment is required for this assay, which is not dependent on radiolabeling or preparation of specific immunologic reagents.

journal_name

Connect Tissue Res

authors

Bleeg HS

doi

10.3109/03008209109152442

subject

Has Abstract

pub_date

1991-01-01 00:00:00

pages

247-57

issue

4

eissn

0300-8207

issn

1607-8438

journal_volume

26

pub_type

杂志文章
  • Ectopic osteogenesis of hBMP-2 gene-transduced human bone mesenchymal stem cells/BCB.

    abstract::We determined the feasibility of using scaffolds of adenoviral human BMP2 gene (AdBMP2)-modified human bone marrow mesenchymal stem cells (hBMSCs) and antigen-free bovine cancellous bone (BCB) to construct bone tissue. hMSCs were infected with AdBMP-2. Expression of BMP-2 and alkaline phosphatase confirmed successful ...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008200903318295

    authors: Han D,Li J,Guan X

    更新日期:2010-08-01 00:00:00

  • High-magnitude mechanical strain inhibits the differentiation of bone-forming rat calvarial progenitor cells.

    abstract:PURPOSE:Orthodontic tooth movement occurs during the bone remodeling induced by therapeutic mechanical strain. It is important to investigate the relation between the strength of mechanical stress and bone formation activity. The aim of this study was to determine the effect of high-magnitude mechanical strain on bone ...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008207.2015.1040878

    authors: Fushiki R,Mayahara K,Ogawa M,Takahashi Y,Karasawa Y,Tsurumachi N,Tamura T,Shimizu N

    更新日期:2015-01-01 00:00:00

  • In vivo expression of classic PKC isoforms in the rat dental follicle as related to tooth eruption.

    abstract::Activation of protein kinase C (PKC) can upregulate tooth eruption molecules such as osteoprotegerin (OPG) and vascular endothelial growth factor (VEGF). In this study, we examined the in vivo gene expression of classic isoforms of PKC in the dental follicle of postnatal rats. The expression level of PKC-alpha was sig...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.1080/03008200490882628

    authors: Yao S,Wise G

    更新日期:2004-01-01 00:00:00

  • Roles of large aggregating proteoglycans in human intervertebral disc degeneration.

    abstract::Degeneration of the intervertebral discs, a natural progression of the aging process, is strongly implicated as a cause of low back pain. Aggrecan is the major structural proteoglycan in the extracellular matrix of the intervertebral disc. It is large, possessing numerous glycosaminoglycan chains and the ability to fo...

    journal_title:Connective tissue research

    pub_type: 杂志文章,评审

    doi:10.1080/03008207.2018.1499731

    authors: Wei Q,Zhang X,Zhou C,Ren Q,Zhang Y

    更新日期:2019-05-01 00:00:00

  • Joint immobilization induced hypoxic and inflammatory conditions in rat knee joints.

    abstract::The purpose of this study was to examine the hypoxic and inflammatory conditions after immobilization in the joint capsule of rat knees. The unilateral knee joints of adult male rats were immobilized with an internal fixator (Im group) for 1 day, 3 days, and 1, 2, 4, 8, and 16 weeks. Sham-operated animals had holes dr...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008207.2013.786056

    authors: Yabe Y,Hagiwara Y,Suda H,Ando A,Onoda Y,Tsuchiya M,Hatori K,Itoi E

    更新日期:2013-01-01 00:00:00

  • Structure of the 3' region of the human elastin gene: great abundance of Alu repetitive sequences and few coding sequences.

    abstract::Two overlapping clones encompassing 8.5 kb of the human elastin gene were isolated from two genomic libraries constructed by partial digestion with either HaeIII/AluI or Sau3A and contained in lambda Charon 4A or EMBL3, respectively. The 6 kb of DNA comprising the most 3' portion of the gene were sequenced demonstrati...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008208709006976

    authors: Indik Z,Yoon K,Morrow SD,Cicila G,Rosenbloom J,Rosenbloom J,Ornstein-Goldstein N

    更新日期:1987-01-01 00:00:00

  • Mechanosensitive Ca2+ signaling and coordination is diminished in osteocytes of aged mice during ex vivo tibial loading.

    abstract::Purpose: The osteocyte is considered the major mechanosensor in bone, capable of detecting forces at a cellular level to coordinate bone formation and resorption. The pathology of age-related bone loss, a hallmark of osteoporosis, is attributed in part to impaired osteocyte mechanosensing. However, real-time evidence ...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.1080/03008207.2020.1712377

    authors: Morrell AE,Robinson ST,Silva MJ,Guo XE

    更新日期:2020-05-01 00:00:00

  • Functional and molecular changes in colony stimulating factor secretion by osteoblasts.

    abstract::Two populations of primary osteoblasts and the cloned murine osteoblast cell line MC3T3 were activated with osteotropic agents and the conditioned media tested for the presence of macrophage colony stimulating factor (M-CSF). Differences in ability of the three populations to secrete the cytokine as well as in the eff...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008208909023884

    authors: Horowitz MC,Einhorn TA,Philbrick W,Jilka RL

    更新日期:1989-01-01 00:00:00

  • A comparison of bovine nasal cartilage proteoglycan core protein produced by chondroitinase and hyaluronidase: the possible role of protease contaminants.

    abstract::The basic subunit of cartilage proteoglycan consists of multiple glycosaminoglycan chains covalently attached to a core protein. It is unclear as to whether there is a single core protein or multiple different core proteins, since previous studies using either chondroitinase or testicular hyaluronidase to enzymaticall...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008207709152265

    authors: Keiser HD,Hatcher VB

    更新日期:1977-01-01 00:00:00

  • Transforming growth factor beta: an autocrine regulator of chondrocytes.

    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

    authors: Rosier RN,O'Keefe RJ,Crabb ID,Puzas JE

    更新日期:1989-01-01 00:00:00

  • Matrix accumulation and retention in embryonic cartilage and in vitro chondrogenesis.

    abstract::Since hyaluronan anchors the proteoglycan-rich pericellular matrix to chondrocytes, hyaluronan-cell interactions may direct cartilage matrix assembly. To test this hypothesis, the competitive binding of hyaluronan hexasaccharides for native hyaluronan during matrix assembly, accumulation and retention in embryonic car...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008209609028895

    authors: Maleski MP,Knudson CB

    更新日期:1996-01-01 00:00:00

  • Molecular events surrounding collagen fibril assembly in the early healing rabbit medial collateral ligament--failure to recapitulate normal ligament development.

    abstract::??Although injuries to the medial collateral ligament (MCL) can heal functionally without surgical intervention, the collagen fibers in the healing tissue remain compromised. The molecular basis for this poor healing potential was investigated by examining extracellular matrix-modifying molecules such as bone morphoge...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008207.2010.524719

    authors: Achari Y,Chin JW,Heard BJ,Rattner JB,Shrive NG,Frank CB,Hart DA

    更新日期:2011-01-01 00:00:00

  • Glycosaminoglycan synthesis by Dupuytren's cells in culture.

    abstract::Glycosaminoglycan synthesis by cells cultured from nodule or band tissues of patients with Dupuytren's disease was compared with that of skin fibroblasts cultured from uninvolved areas of the palm. No differences were observed in culture which could account either for the abnormal glycosaminoglycan content or the incr...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008208209160272

    authors: Slack C,Flint MH,Thompson BM

    更新日期:1982-01-01 00:00:00

  • Explant models for meniscus metabolism, injury, repair, and healing.

    abstract::Purpose/Aim: Knee meniscus is a wedge-shaped fibrocartilaginous tissue, playing important roles in maintaining joint stability and function. Injuries to the meniscus, particularly with the avascular inner third zone, hardly heal and frequently progress into structural breakdown, followed by the initiation of osteoarth...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.1080/03008207.2019.1702031

    authors: Tarafder S,Park G,Lee CH

    更新日期:2020-05-01 00:00:00

  • Enamel specific protein kinases and state of phosphorylation of purified amelogenins.

    abstract::Ameloblastic tissue samples from unerupted bone molars were used to prepare subcellular enamel protein kinase preparations, nuclear + plasma membrane, cytosolic and microsomal, and used in in vitro phosphorylation of purified 20 kDa bovine amelogenin in the presence of 32P-ATP. Both cytosolic and microsomal preparatio...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008209809017041

    authors: Salih E,Huang JC,Strawich E,Gouverneur M,Glimcher MJ

    更新日期:1998-01-01 00:00:00

  • Time-dependent properties of human umbilical fascia.

    abstract::This investigation is devoted to the study of the viscoelastic behavior of human abdominal fascia from the umbilical region. Seventeen samples 10 mm wide and up to 70 mm long were cut along the primary fiber direction (group FL) or perpendicular to it (group FT) and subjected to relaxation tests. The viscoelastic resp...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008207.2011.604452

    authors: Kirilova M

    更新日期:2012-01-01 00:00:00

  • Detection of tubulointerstitial nephritis antigen (TIN-ag) in Lewis rat.

    abstract::Tubulointerstitial nephritis antigen (TIN-ag) is a recently described basement membrane component reactive with autoantibodies in some forms of autoimmune mediated tubulointerstitial nephritis. Immunofluorescence studies using polyclonal and monoclonal antibodies have indicated a restrictive tissue distribution for TI...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008209709160222

    authors: Nelson TR,Butkowski RJ,Michael AF,Charonis AS

    更新日期:1997-01-01 00:00:00

  • Ovalbumin is a component of the chicken eggshell matrix.

    abstract::The protein components of biomineralized structures (matrix proteins) are believed to modulate crystal nucleation and growth, and thereby influence the shape and strength of the final structure. The chicken eggshell contains a complex array of distinct matrix proteins. One of these was found to have similar molecular ...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008209509010814

    authors: Hincke MT

    更新日期:1995-01-01 00:00:00

  • Hyaluronic acid promotes proliferation and migration of human meniscus cells via a CD44-dependent mechanism.

    abstract:PURPOSE:Treatment of meniscal injury is important for osteoarthritis (OA) prevention. Meniscus cells are divided between inner and outer cells, which have different characteristics and vascularity. We evaluated the effects of hyaluronic acid (HA) on the proliferation and migration of human inner and outer meniscus cell...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.1080/03008207.2018.1465053

    authors: Murakami T,Otsuki S,Okamoto Y,Nakagawa K,Wakama H,Okuno N,Neo M

    更新日期:2019-03-01 00:00:00

  • The effect of various avocado oils on skin collagen metabolism.

    abstract::The effects of various avocado oils on collagen metabolism in skin were studied in growing rats fed diets containing 10% (w/w) of the tested oils. Rats fed the unrefined avocado oil extracted with hexane from the intact fruit, its unsaponifiables or the avocado seed oil, showed significant increases in soluble collage...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008209109152159

    authors: Werman MJ,Mokady S,Nimni ME,Neeman I

    更新日期:1991-01-01 00:00:00

  • In situ hybridization of calbindin-D 28 k transcripts in undecalcified sections of the rat continuously erupting incisor.

    abstract::Calbindin-D9k and calbindin-D-28k genes are useful systems to investigate the tissue- and stage-specificity as well as the hormonal control of gene expression. Since they regulate cellular calcium mobilization, their study may be of interest in mineralized tissues. However, thus far, immunocytochemical labelling has b...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008209509013716

    authors: Hotton D,Davideau JL,Bernaudin JF,Berdal A

    更新日期:1995-01-01 00:00:00

  • Generation of Hall voltage in bone.

    abstract::Hall type voltage has been observed in bone and its two major components (collagen and apatite) in the region of moderately high electric and magnetic fields. The configuration of the sample placement and the experimental set up was the same as that adopted in standard Hall measurements. The resistivity of the sample ...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008207809152629

    authors: Behari J,Andrabi WH

    更新日期:1978-01-01 00:00:00

  • Pharmacokinetics of intravenously administered desmosine in sheep.

    abstract::The pharmacokinetics of desmosine following a 5 mg intravenous dose was determined in five sheep. The biological half-life (t 1/2 beta) of desmosine varied between 81-489 min. Urinary recovery of unchanged desmosine indicated that the compound is not extensively metabolized and that the primary route of elimination is...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008208409013681

    authors: Verma PS,Hoyt RF Jr,Jackson AJ,Phillips YY

    更新日期:1984-01-01 00:00:00

  • Bouts of passive stretching after immobilization of the rat soleus muscle increase collagen macromolecular organization and muscle fiber area.

    abstract::This study evaluated the effect of short bouts of stretching on the soleus muscle after immobilization, by measuring the birefringence of the intramuscular connective tissue (ICT) and the muscle fiber area. Thirty rats were divided into five groups: the left soleus was immobilized in the shortened position; after immo...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.1080/03008200600995940

    authors: Coutinho EL,DeLuca C,Salvini TF,Vidal BC

    更新日期:2006-01-01 00:00:00

  • Initial characterization of small proteoglycans synthesized by embryonic chick leg muscle-associated connective tissues.

    abstract::Muscle development in the embryonic chick involves the interfacing of two different cell types: myogenic cells forming the contractile network and connective tissue cells which wrap this network into discrete morphologies. Previous reports from this laboratory detailed the characterization of large extracellular matri...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008208809015023

    authors: Young HE,Carrino DA,Caplan AI

    更新日期:1988-01-01 00:00:00

  • Water content of equine articular cartilage: effects of enzymatic degradation and "artificial fibrillation".

    abstract::A method is described for accurate and reproducible determination of wet and dry weights of small articular cartilage samples. The water content of the articular cartilage samples before and after treatment with selective degradative enzymes and "artificial fibrillation" was determined. It was found that the water con...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008208209160266

    authors: Simon WH,Wohl DL

    更新日期:1982-01-01 00:00:00

  • The biomechanical and biochemical properties of swine tendons--long term effects of exercise on the digital extensors.

    abstract::Positive effects on the tensile characteristics of swine digital extensors were found following twelve months of exercise training. Compared to sedentary controls, the tendons from the exercised animals became stronger as a material and exhibited hypertrophy. These biomechanical results were supported by biochemical a...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008208009152109

    authors: Woo SL,Ritter MA,Amiel D,Sanders TM,Gomez MA,Kuei SC,Garfin SR,Akeson WH

    更新日期:1980-01-01 00:00:00

  • Expression analysis of angiogenic growth factors and biological axis CXCL12/CXCR4 axis in idiopathic pulmonary fibrosis.

    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

    authors: Antoniou KM,Soufla G,Lymbouridou R,Economidou F,Lasithiotaki I,Manousakis M,Drositis I,Spandidos DA,Siafakas NM

    更新日期:2010-01-01 00:00:00

  • Some biochemical and biophysical parameters for the study of the pathogenesis of osteoarthritis: a comparison between the processes of ageing and degeneration in human hip cartilage.

    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

    authors: Grushko G,Schneiderman R,Maroudas A

    更新日期:1989-01-01 00:00:00

  • Keratocan is expressed by osteoblasts and can modulate osteogenic differentiation.

    abstract::Keratocan is an extracellular matrix protein that belongs to the small leucine-rich proteoglycan family that also includes lumican, biglycan, decorin, mimecan, and fibromodulin. Members of this family are known to play a role in regulating cellular processes such as proliferation and modulation of osteoprogenitor line...

    journal_title:Connective tissue research

    pub_type: 杂志文章

    doi:10.3109/03008207.2010.546536

    authors: Igwe JC,Gao Q,Kizivat T,Kao WW,Kalajzic I

    更新日期:2011-10-01 00:00:00