Abstract：
:Several phosphoprotein preparations (phosvitin, rat incisor and fetal calf molar dentin phosphoproteins) all inhibit apatite growth/replication from pre-existing crystal seeds in metastable solutions. Two stages of the crystal growth process were inhibited by these phosphoproteins. First an initial lag period was induced, probably associated with seed surface phenomena. This period was prolonged indefinitely when a combination of phosphoprotein precoated seeds was used together with soluble phosphoproteins in the crystal growth reaction. Second, the phosphoproteins prolonged that stage of the reaction where octacalcium phosphate is the predominant mineral phase present prior to its conversion to the final apatite product. Pre-treatment of the phosphoproteins with calcium diminished their inhibitory activity to seeded crystal growth as well as towards de novo apatite formation in synthetic extracellular fluids. The presence of collagen diminished the inhibitory activity of the phosphoproteins towards de novo precipitation but had no effect on phosphoprotein-modulated apatite crystal growth in the seeded systems. These results suggest a potential regulatory role for phosphoproteins in dentin mineralization.
journal_name
Calcif Tissue Intjournal_title
Calcified tissue internationalauthors
Termine JD,Eanes ED,Conn KMdoi
10.1007/BF02407188subject
Has Abstractpub_date
1980-01-01 00:00:00pages
247-51issue
3eissn
0171-967Xissn
1432-0827journal_volume
31pub_type
杂志文章abstract：:Osteoblasts in vitro differentiate from a proliferating to a mineralizing phenotype upon transfer to a medium rich in beta-glycerophosphate and ascorbic acid. The nutritional requirements of the cells at different stages of this differentiation process are not known. In other cell types, nutritional supplementation du...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-011-9537-6
更新日期：2011-12-01 00:00:00
abstract：:The histologic heterogeneity of osteoporosis relative to normal controls has attracted great interest. There has been controversy as to whether patients with high turnover osteoporosis may convert to a normal or low turnover form, and vice versa. We have studied 44 patients over 12 years by dynamic histomorphometry an...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF00675620
更新日期：1993-01-01 00:00:00
abstract：:The purpose of this study was to examine the effects of green tea extract (GTE) intake on bone structural and physiological properties, such as bone mass, trabecular bone microarchitecture, cortical bone geometry, and bone mechanical strength, in growing rats. Four-week-old male Wistar rats were divided into the follo...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-017-0358-0
更新日期：2018-03-01 00:00:00
abstract：:Cross-sectional and case-control studies are efficient and inexpensive approaches to the study of osteoporosis; their validity depends primarily on how the subjects are sampled. Retrospective studies of fractures may be biased if measurements change as a result of the fracture. Prospective cohort studies are less pron...
journal_title：Calcified tissue international
pub_type： 杂志文章,评审
doi：10.1007/BF02555081
更新日期：1991-01-01 00:00:00
abstract：:The mineral of cortical bones has been studied in newborn, growing, and adult rats and in the calf and cow, using X-ray diffraction and infrared spectroscopy during the thermal decomposition of bones and by microassay of carbonate. The mineral of all the bone samples, regardless of species or age, was found to be a ca...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF02563793
更新日期：1987-09-01 00:00:00
abstract：:The recent advancement of high resolution magnetic resonance imaging has opened up new avenues for the determination of structural characteristics of the trabecular network, which may significantly improve the diagnosis of osteoporosis. An analysis of the calcaneus in healthy women has shown similar age-related change...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s002230001168
更新日期：2001-03-01 00:00:00
abstract：:Long chain polyunsaturated fatty acids (LCPUFAs) are involved in the regulation of bone metabolism. Increased dietary consumption of n-3, and possibly some n-6, LCPUFAs may limit postmenopausal bone loss. The aim of this study was to determine the effects on bone of specific fatty acids within the n-3 and n-6 LCPUFA f...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-007-9080-7
更新日期：2007-12-01 00:00:00
abstract：:Even though indirect evidence indicates that PTH exerts an anabolic effect on dentinogenesis, the existence of PTH receptors and any second-messenger response in odontoblasts have not been demonstrated. The aim of this study was to investigate whether rat incisor odontoblasts express PTH receptors, and to identify whi...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s002239900426
更新日期：1998-03-01 00:00:00
abstract：:In vitro models of osteogenesis are essential for investigating bone biology and the effects of pharmaceutical, chemical, and physical cues on bone formation. Osteogenesis takes place in a complex three-dimensional (3D) environment with cells from both mesenchymal and hematopoietic origins. Existing in vitro models of...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-011-9467-3
更新日期：2011-05-01 00:00:00
abstract：:Mechanical forces applied to cultured bone cells induce the production of cAMP via stimulation of the formation of prostaglandin E2 (PGE2) and its release into the medium, resulting in stimulation of adenylate cyclase. In this paper we show that either the antibiotic gentamycin (100 micrograms/ml) or antiphospholipid ...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF02553753
更新日期：1988-04-01 00:00:00
abstract：:Observational studies examining associations of smoking and alcohol consumption with bone mineral density (BMD) have generated inconsistent results and suffer from several methodological limitations. We aim to evaluate whether there are causal associations between smoking, alcohol consumption, and BMD using a Mendelia...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-018-0452-y
更新日期：2018-11-01 00:00:00
abstract：:Bone involvement, mainly osteoporosis but also osteosclerosis, is frequent in patients with indolent systemic mastocytosis (ISM). The recent characterization of the canonical Wnt/β-catenin pathway in the regulation of bone remodeling provided important insights for our understanding of the pathophysiology of a number ...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-015-9969-5
更新日期：2015-05-01 00:00:00
abstract：:To study the mechanism of action of thyroid hormones on bone, we examined the effects of immunosuppressive and nonimmunosuppressive cyclosporins, as well as of transforming growth factor beta 1 (TGF beta 1), 17 beta-estradiol (E2), and dihydroxytestosterone (DHT) on thyroxine (T4)- and triiodothyronine (T3)-stimulated...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF00298788
更新日期：1992-02-01 00:00:00
abstract：:The purpose of this study is to evaluate degenerative factors in a postmenopausal patient group and differentiate the influence on bone mineral density (BMD) measurements by dual-energy X-ray absorptiometry (DXA). The patients and methods included an investigation of 144 postmenopausal women (mean 63.3 years) with PA-...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s002239900258
更新日期：1997-05-01 00:00:00
abstract：:Extracellular ATP, and to a lesser extent adenosine, an ATP metabolite, stimulated cell proliferation in osteoblast-like cells (MC3T3-E1). ATP increased cytosolic Ca2+ due to Ca2+ mobilization from intracellular storage in the same concentration range of the nucleotide as that effective for DNA synthesis, suggesting t...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF02529732
更新日期：1996-02-01 00:00:00
abstract：:The purpose of the present study was to determine if the type of dietary fat can modify the fatty acid composition and arachidonic acid levels in the alveolar bone phospholipids. Three groups of rats were fed nutritionally adequate semipurified diets containing different lipids: 10% corn oil (control, group I, rich in...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF01351838
更新日期：1993-11-01 00:00:00
abstract：:The small proteoglycan decorin had been localized previously at the d-band in the gap zone of collagen fibrils in nonmineralizing tissues. In bone matrix this zone is proteoglycan free and is at least in some species the place where mineralization along collagen fibrils starts. To study the metabolism of the small pro...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s002239900279
更新日期：1997-06-01 00:00:00
abstract：:Amelogenins, the major protein components of the enamel extracellular matrix, are postulated to be involved in controlling the elongated and oriented growth of enamel carbonated apatite crystals. In order to clarify the functional role of amelogenin during the early stage of enamel biomineralization, octacalcium phosp...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-002-0011-3
更新日期：2004-06-01 00:00:00
abstract：:Whether the decrease of zinc content in the femoral-metaphyseal tissues of rats with skeletal unloading is involved in the alteration of bone metabolism was investigated. Skeletal unloading was designed using the model of hindlimb suspension in rats. Animals were fed for 4 days with the unloading. The metaphyseal zinc...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF00310262
更新日期：1995-09-01 00:00:00
abstract：:The severest long-term complications of orthopedic joint-prostheses are associated with loosening of the implant-bone interface, due to adverse reactions in bone and subsequent weakening of the connection between the two materials. Mechanical stresses, caused by joint loading, play a key role in the adaption of interf...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF02406143
更新日期：1984-01-01 00:00:00
abstract：:Risk factors for increased mortality in hip fracture patients include older age, male sex, fracture type, bone mineral density, and pre-existing co-morbidities. The role of biochemical and other anthropometric parameters on hip fracture mortality remains unclear. The aim of this study was to identify the risk factors ...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-015-0070-x
更新日期：2016-01-01 00:00:00
abstract：:Sarcopenia is now clinically defined as a loss of muscle mass coupled with functional deterioration (either walking speed or distance or grip strength). Based on the FRAX studies suggesting that the questions without bone mineral density can be used to screen for osteoporosis, there is now a valid simple questionnaire...
journal_title：Calcified tissue international
pub_type： 杂志文章,评审
doi：10.1007/s00223-015-0022-5
更新日期：2016-04-01 00:00:00
abstract：:The effect of long-chain n-3 polyunsaturated fatty acid (PUFA) on bone measurements was evaluated in gonad-intact middle-aged male rats. Seven rats were killed on day 0 of dietary intervention to determine bone parameters at baseline. Experimental rats (7/group) were fed one of the following lipid treatments (g/kg die...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-007-9010-8
更新日期：2007-04-01 00:00:00
abstract：:Histomorphometric evaluation of bone formation in an intravital tetracycline-labeled skeleton of a suddenly deceased osteoporotic woman is presented. The 24 skeletal sites investigated displayed substantial regional variations which, for two out of four cortical bone dynamics and all trabecular bone dynamics, were sig...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF02556619
更新日期：1987-04-01 00:00:00
abstract：:Using data from the Peking Vertebral Fracture Study, we conducted a longitudinal cohort study to investigate the association between type 2 diabetes mellitus (T2DM) and the risk of incident fractures, especially of vertebral fractures (VFs), and we also examined the modifying effect of body mass index (BMI) on this as...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-019-00598-x
更新日期：2019-11-01 00:00:00
abstract：:Correlated studies were performed with light and electron microscopy, and backscattered electron image in conjunction with X-ray microanalysis, of lanthanum-incubated epiphyseal cartilage of the young rat. The hall-mark of this procedure is the appearance of LaP electron-dense deposits (not present in control sections...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF02508648
更新日期：1996-04-01 00:00:00
abstract：:The effects of a series of novel phosphonates on the kinetics of mineral development in an ionophore-primed 7:2:1 phosphatidylcholine (PC): dicetylphosphate (DCP): cholesterol (Chol) liposomal model system are reported. When present at 2.5 micromol/liter or 25 micromol/liter concentrations in the solution surrounding ...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF02509384
更新日期：1996-05-01 00:00:00
abstract：:Test implant plates surgically retrieved from distal femurs of dogs were studied by Raman spectroscopy in order to characterize the bone-implant interface. The implant surface consisted of phosphate mineral, plasma sprayed on a titanium substrate. On the basis of its spectroscopic signature, the phosphate mineral of b...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF02556157
更新日期：1991-05-01 00:00:00
abstract：:Discarded tissues, like human amniotic membranes and adipose tissue, were investigated for the application of Decellularized Human Amniotic Membrane (DAM) as a viable scaffold for transplantation of Adipose-derived stromal cells (ASCs) in bone regeneration of non-healing calvarial defects in rats. Amniotic membrane wa...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-020-00793-1
更新日期：2021-01-09 00:00:00
abstract：:The existence of nutritional deficiency rickets among infants in sunny Riyadh was confirmed radiologically. Most of the rachitic infants were breast-fed, some received unsupplemented infant feeding formulae, and all live in an environment that is devoid of sunlight. Their mean age at the time of onset was 10.5 months....
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF02405328
更新日期：1984-05-01 00:00:00
