Abstract:
:This study was designed to determine the effects of pulsed electromagnetic fields (PEMF) on the mRNA expression of the receptor activator of NF-kappa-B (RANK) and carbonic anhydrase II (CA II) in ovariectomized rat osteoclast-like cells. Marrow cells were harvested from femora and tibiae of rats, from which the ovaries had been totally excised, and cultured in 6-well chamber slides. After 1 day of incubation, the marrow cells were exposed to PEMF for 3 days with 3.8 mT, 8 Hz, and 40 min per day. Osteoclast-like cells were confirmed by both tartrate resistant acid phosphatase (TRAP) stain and bone resorption assay. The expression of RANK and CA II mRNA was determined with real-time fluorescent-nested quantitative polymerase chain reaction. Compared with the sham group, the level of serum estradiol in the ovariectomized group was significantly decreased ( p < 0.05). The numbers of multinucleated, TRAP-positive osteoclast-like cells and resorption pits formed were observed. In invitro study, the expression of RANK and CA II were measured in sham, ovariectomized without PEMF, and ovariectomized with PEMF treatment. Compared with the ovariectomized (PEMF) experimental group and sham group, CA II mRNA expression was significantly increased in the ovariectomized control group ( p < 0.05, 0.01, respectively). Compared with the sham group, RANK mRNA expression was significantly increased in the ovariectomized control group ( p < 0.05). These data suggest that PEMF could regulate the expression of RANK and CA II mRNA in the marrow culture system.
journal_name
Connect Tissue Resjournal_title
Connective tissue researchauthors
Chen J,He HC,Xia QJ,Huang LQ,Hu YJ,He CQdoi
10.3109/03008200902855917subject
Has Abstractpub_date
2010-01-01 00:00:00pages
1-7issue
1eissn
0300-8207issn
1607-8438journal_volume
51pub_type
杂志文章abstract::Osteogenesis imperfecta is a congenital disease commonly characterized by brittle bones and caused by mutations in the genes encoding Type I collagen, the single most abundant protein produced by the body. The oim model has a natural collagen mutation, converting its heterotrimeric structure (two α1 and one α2 chains)...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008207.2014.923860
更新日期:2014-08-01 00:00:00
abstract::Bone and dentin contain many phosphoproteins in their extracellular matrix. It has been postulated that the anionic character of these proteins, and the presence of phosphate groups in particular, is important for various functions related to biomineralization. Phosphophoryns (PP), are the most highly phosphorylated d...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008209609029194
更新日期:1996-01-01 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
abstract:PURPOSE:Our previous study showed that partial-thickness articular cartilage defects (PTCDs) created in immature rats spontaneously healed to resemble normal hyaline cartilage, but that of mature rats did not. To identify molecules involved in the spontaneous cartilage repair observed in this model, gene expression was...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008207.2015.1121250
更新日期:2016-05-01 00:00:00
abstract::Bone sialoprotein is a 34 kDa phosphorylated and sulphated glycoprotein that is essentially unique to mineralizing connective tissues. Recent studies on the developmental expression of BSP mRNA and the temporo-spatial appearance of the protein during bone formation in vivo and in vitro have demonstrated that BSP is ex...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008209609029171
更新日期:1996-01-01 00:00:00
abstract::During cloning of the rat incisor phosphophoryn gene, several clones were identified with a PP antibody. One of the clones (2PP) was shown to encode a PP denoted as dentin matrix protein 2, DMP2. We have now sequenced another clone, which appears to be bifunctional, or at minimum, has two distinct domains. The 5' regi...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008209909005277
更新日期:1999-01-01 00:00:00
abstract::Osteoarthritis (OA), the most common form of degenerative joint disease, is linked to high morbidity. It is predicted to be the single greatest cause of disability in the general population by 2030. The development of disease-modifying therapy for OA currently face great obstacle mainly because the onset and developme...
journal_title:Connective tissue research
pub_type: 杂志文章,评审
doi:10.1080/03008207.2016.1177036
更新日期:2016-07-01 00:00:00
abstract::Several proteins may play a role in bone formation. The C-propeptide of type II collagen is intimately associated with endochondral bone formation in bovine growth plate. We have used an antibody against this peptide to determine its immunofluorescent distribution in early stages of embryonic chick limb development wi...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008208909002417
更新日期:1989-01-01 00:00:00
abstract::Growth and differentiation factor-5 (GDF-5) is known to induce tendon tissue and stimulate tendon healing. The hypothesis was that adenoviral GDF-5 transfer leads to transitory transgene expression and improves Achilles tendon healing. In vitro experiments were first performed with rat tenocytes. Transgene expression ...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.1080/03008200500237120
更新日期:2005-01-01 00:00:00
abstract::Depolymerization of Ch-4-S, Ch-6-S, HA and HP was observed by gel filtration after treatment with 2-10 N NaOH or Ba(OH)2 in the presence of NaBH4 at 80-83 degrees for 1-5 hr. Depolymerized products were isolated after these treatments. 4-Deoxy-alpha-L-threo-4-enohexopyranosyluronic acid residue as the nonreducing end ...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008207509152343
更新日期:1975-01-01 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::In the early mineralized enamel crystals, ribbon-like crystals appear near the ameloblasts. Some ribbon-like crystals showed helical or spiral structure within restricted environment during the preparation of embryonic bovine specimens for electron microscope. These specimens did not suffer from the cutting damages no...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008209809017027
更新日期:1998-01-01 00:00:00
abstract::Scanning electron microscopy and high angle X-ray diffraction were used to define the relationship between collagen and elastin of bovine aortic wall. The diffraction pattern shows on one hand that the broad rings at 4.5 A and 9 A, due to elastin, do not orient on stretching and on the other hand, that the collagen ri...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008207709152610
更新日期:1977-01-01 00:00:00
abstract::To address the molecular mechanisms of cementogenesis, we have isolated dental follicle cells and examined them to see if they contain cementoblast progenitors. Dental follicle tissue was dissected from the root surface of bovine tooth germ and cells were released by digestion with bacterial collagenase. The released ...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.1080/03008200290001023
更新日期:2002-01-01 00:00:00
abstract::The mechanical properties of collagen as a biopolymer ensures that collagen has a significant influence on the mechanical behavior of the host tissue. Structural organization is a key to that influence. We have assessed this relationship quantitatively in the tunica media of arteries from the heart and brain, using th...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008209109152168
更新日期:1991-01-01 00:00:00
abstract::The eggshell is an highly ordered structure deposited in the distal oviduct and composed of calcium carbonate and an organic matrix which is believed to influence its fabric. We have identified ovotransferrin as an 80 kDa matrix protein observed at high concentration in the uterine fluid at the initial stage of shell ...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008200109016840
更新日期:2001-01-01 00:00:00
abstract::A transmission electron microscope study of carbonate apatite crystals isolated from bone and mineralizing tendon, as well as those produced synthetically under approximated-physiological conditions, shows that they are thin irregular shaped plates. Electron diffraction patterns of individual crystals confirm that the...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008209109029158
更新日期:1991-01-01 00:00:00
abstract::The mechanical properties of the human supraspinatus tendon (SST) are highly heterogeneous and may reflect an important adaptive response to its complex, multiaxial loading environment. However, these functional properties are associated with a location-dependent structure and composition that have not been fully eluc...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008207.2013.847096
更新日期:2013-01-01 00:00:00
abstract:AIM OF THE STUDY:Tendons are exposed to mechanical stress constantly during movements and thus they are frequently subjected to injuries. Rotator cuff tears are common musculoskeletal disorders, mainly involving the supraspinatus tendon. The characterization of the tenocytes derived from this tendon and the comparison ...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.1080/03008207.2020.1816993
更新日期:2020-09-14 00:00:00
abstract::Recently our laboratory has reported, in a lacerated flexor tendon model, that the "early turnover" phase of the repair process extends for a longer period of time in vivo than previously documented. The extensive turnover of the collagenous matrix was consistent with the presence of collagenolytic activity in repairi...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008208909103903
更新日期:1989-01-01 00:00:00
abstract::Human skin fibroblasts cultured with 4-methylumbelliferone (MU), a hyaluronan synthesis inhibitor, produce a hyaluronan-deficient extracellular matrix (See [9]). Our present study investigated the effects of MU on proteoglycan, which is the other main component of the extracellular matrix, and interacts with hyalurona...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.1080/03008200802684615
更新日期:2009-01-01 00:00:00
abstract::The experiments described herein tested the effects of CaCl2 and ZnCl2, added at various concentrations in the culture medium, upon the synthesis of collagen and proteoglycan by adult and fetal (articular, epiphyseal and hypertrophic) bovine chondrocytes maintained in high density multilayer cultures. CaCl2 concentrat...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008209609000700
更新日期:1996-01-01 00:00:00
abstract::The in-vitro fluoride treatment technique has been introduced to investigate the composite behavior of bone tissue. Bone tissue with different mechanical properties can be obtained by varying the concentration, pH and immersion time in fluoride ion solutions. The chemical and physical changes in intact pieces of bone ...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:
更新日期:2002-01-01 00:00:00
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
更新日期:1987-01-01 00:00:00
abstract::Heparin treated and aldehyde crosslinked rat aorta segments were implanted in infrarenal aorta of homologous rats. One year following aortic replacement, the subendothelial scar and the prosthetic remnants were excised. The scar and the host intima-media were incubated with 3H-valine for 4 h and extracted with 5 M gua...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008208309005609
更新日期:1983-01-01 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::DNA synthesis in rat and rabbit polyvinyl sponge induced granulation tissue has been studied using thymidine (methyl-3H). Synthesis was determined by measurement of thymidine incorporation into cold trichloroacetic acid insoluble material and by autoradiography. Granulation tissue was removed and immediately incubated...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008207609152225
更新日期:1976-01-01 00:00:00
abstract::Abnormal polyanion metabolism in cultured fibroblasts from patients with pseudoxanthoma elasticum (PXE) was studied by incubating normal and PXE fibroblasts in culture medium containing 35SO4 for 96 hr and measuring differences in secreted 35SO4-labelled proteoglycans (35S-PG). PXE medium contained less high molecular...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008207809152287
更新日期:1978-01-01 00:00:00
abstract::The ultrastructural features of the cells and of the oxytalan fibers within the periodontal ligaments of aged rats (2 year old) were quantified and compared with data for tissues obtained from younger animals (8 week old). Sections of the mid-root regions of the mandibular first molars were prepared for examination by...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008209509016978
更新日期:1995-01-01 00:00:00
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
更新日期:1998-01-01 00:00:00