Abstract：
:We had shown that aromatic amino acid (phenylalanine, tyrosine, and tryptophan) supplementation prevented bone loss in an aging C57BL/6 mice model. In vivo results from the markers of bone breakdown suggested an inhibition of osteoclastic activity or differentiation. To assess osteoclastic differentiation, we examined the effects of aromatic amino acids on early /structural markers as vitronectin receptor, calcitonin receptor, and carbonic anhydrase II as well as, late/functional differentiation markers; cathepsin K and matrix metalloproteinase 9 (MMP-9). Our data demonstrate that the aromatic amino acids down-regulated early and late osteoclastic differentiation markers as measured by real time PCR. Our data also suggest a link between the vitronectin receptor and the secreted cathepsin K that both showed consistent effects to the aromatic amino acid treatment. However, the non-attachment related proteins, calcitonin receptor, and carbonic anhydrase II, demonstrated less consistent effects in response to treatment. Our data are consistent with aromatic amino acids down-regulating osteoclastic differentiation by suppressing remodeling gene expression thus contributing initially to the net increase in bone mass seen in vivo.
journal_name
Calcif Tissue Intjournal_title
Calcified tissue internationalauthors
Refaey ME,Zhong Q,Ding KH,Shi XM,Xu J,Bollag WB,Hill WD,Chutkan N,Robbins R,Nadeau H,Johnson M,Hamrick MW,Isales CMdoi
10.1007/s00223-014-9878-zsubject
Has Abstractpub_date
2014-08-01 00:00:00pages
174-82issue
2eissn
0171-967Xissn
1432-0827journal_volume
95pub_type
杂志文章abstract：:ATP is as effective as inorganic pyrophosphate in retarding the rate of dissolution of calcium hydroxyapatite at pH 7, ADP is less effective, and AMP is without effect. The inhibition is due to the adsorption of ATP and ADP units on the crystal surface. ...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF02405386
更新日期：1984-12-01 00:00:00
abstract：:Hepatitis C treatment with interferon alpha-2b (IFN-alpha) and ribavirin has been related to decreased bone mineral density. The aim of this study was to investigate the in vitro effects of different concentrations of ribavirin and IFN-alpha on osteoblast-like cells. Human osteoblast-like cells obtained by the outgrow...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-004-0175-0
更新日期：2004-08-01 00:00:00
abstract：:We have previously shown that cyclosporin A (CsA) produces high bone remodeling with resorption exceeding formation and loss of bone volume in the rat. This may have important clinical implications where CsA is widely used in organ transplantation. 1,25 dihydroxyvitamin D3 (1,25(OH)2D3) is a bone mineralizing hormone ...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF02555980
更新日期：1990-09-01 00:00:00
abstract：:Dickkopf-1 (DKK1) and sclerostin are antagonists of the Wnt/β-catenin pathway and decreased expression of either results in increased bone formation and mass. As both affect the same signaling pathway, we aimed to elucidate the redundancy and/or compensation of sclerostin and DKK1. Weekly sclerostin antibody (Scl-Ab) ...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-018-0420-6
更新日期：2018-09-01 00:00:00
abstract：:ELISAs for measuring the urinary excretion of collagen crosslinks and related peptides appear to show marked differences in sensitivity to anti-resorptive therapy. This presumably reflects variations in specificity of the anylate being detected in these assays, and the way in which they respond to treatment. To clarif...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s002239900148
更新日期：1996-11-01 00:00:00
abstract：:The hypophosphatemic male mouse (Hyp/y), the proposed model for human vitamin D-resistant rickets (VDRR), is characterized by chronic hypophosphatemia, dwarfism, and rachitic and osteomalacic bone lesions. We have reported that treatment of Hyp/y mice with phosphate salts (Pi) heals rickets but does not correct the de...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF02411227
更新日期：1982-03-01 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：:A guidance on the assessment and treatment of postmenopausal women at risk from fractures due to osteoporosis was recently published in Osteoporosis International as a joint effort of the International Osteoporosis Foundation and European Society for Clinical and Economic Aspects of Osteoporosis and Osteoarthritis (Ka...
journal_title：Calcified tissue international
pub_type： 杂志文章,评审
doi：10.1007/s00223-018-00512-x
更新日期：2019-03-01 00:00:00
abstract：:High serum levels of IGFBP-1 are related both to low body mass index (BMI) and to low insulin-like growth factor 1 (IGF-I), which both in turn are related to low bone mineral density (BMD) and to increased fracture risk. However, we have found no previous prospective studies on IGFBP-1 and fracture risk. Despite its n...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-016-0152-4
更新日期：2016-10-01 00:00:00
abstract：:Undesirable changes in health-related parameters are thought to occur in retiring female athletes, but this has not been examined in longitudinal studies. The purpose of this study was to examine longitudinal changes in bone mineral density (BMD), body composition, and dietary intake in gymnasts and controls. Nonathle...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-004-0228-4
更新日期：2004-12-01 00:00:00
abstract：:Enamel of intact human teeth laser irradiated in vitro under certain conditions is known to have less subsurface demineralization than unirradiated enamel on exposure to acid; consequently, the potential use of laser irradiance to reduce caries is apparent. The laser-induced physical and/or chemical changes that cause...
journal_title：Calcified tissue international
pub_type： 杂志文章,评审
doi：10.1007/BF02556711
更新日期：1986-04-01 00:00:00
abstract：:Methotrexate (MTX) is one of the most commonly prescribed drugs for autoimmune rheumatic diseases. As there is no consensus on its negative effects on bone, the purpose of this investigation was to determine the clinical spectrum of patients with stress fractures due to long-term MTX treatment (i.e., MTX osteopathy). ...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-020-00765-5
更新日期：2021-02-01 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：:It has long been thought that collagen fibers within the bone matrix are deposited in an aligned pattern that channels mineral growth. If this model of bone structure is correct, both organic and inorganic phases of bone should have similar elastic anisotropy. Using an acoustic microscope, we measured longitudinal and...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF00299319
更新日期：1994-11-01 00:00:00
abstract：:Ossification of the posterior longitudinal ligament of the spine (OPLL) is characterized by ectopic bone formation in the spinal ligaments. Mechanical stress, which acts on the posterior ligaments, is thought to be an important factor in the progression of OPLL. To clarify this mechanism, we investigated the effects o...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-002-0021-1
更新日期：2004-05-01 00:00:00
abstract：:Teriparatide (TPTD) is known to increase the cortical thickness and porosity. The purpose of the present study was to determine whether switching from TPTD to ibandronate (IBN) would be useful for improving cortical bone parameters as assessed using high-resolution quantitative computed tomography (HR-QCT) analyses in...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-016-0180-0
更新日期：2016-11-01 00:00:00
abstract：:The solubilization of alkaline phosphatase (AP) from osteoblastic cell membranes obtained from human primary bone cell cultures was studied according to the age and sex of the donors (17 females, 11 males; age range: 2-77 years). Cell membranes were treated by non-ionic (n-octyl beta-D-glucopyranoside, OG), ionic or z...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s002230050006
更新日期：2000-01-01 00:00:00
abstract：:Residents of a long-stay geriatric ward at the University Hospital Basel were included in a study to investigate the effects of hypovitaminosis D and immobility. All 91 women (mean age 82.5 years) and 92 men (mean age 78.7 years) were enrolled in the study. Measurements included bone resorption, as measured by urinary...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s002239900638
更新日期：1999-06-01 00:00:00
abstract：:Transcriptional regulation of the postnatal skeleton is incompletely understood. Here, we determined the consequence of loss of early growth response gene 1 (EGR-1) on bone properties. Analyses were performed on both the microscopic and molecular levels utilizing micro-computed tomography (micro-CT) and Fourier transf...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-011-9486-0
更新日期：2011-07-01 00:00:00
abstract：:Osteoclasts are multinucleated cells that carry out bone resorption. Analysis of the direct effect of hormones on the bone-resorbing activity of human osteoclasts has been limited by difficulties in isolating these cells from the human skeleton. In this study, human osteoclasts formed from cultures of peripheral blood...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-001-2128-1
更新日期：2002-12-01 00:00:00
abstract：:The small leucine-rich bone proteoglycans, biglycan and decorin, can be purified by chromatography on hydroxyapatite columns, demonstrating their potential affinities for bone apatite. To determine their effects on in vitro apatite formation and growth, a mixture of the chondroitin-sulfate (CS) bone proteoglycans, or ...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s002239900339
更新日期：1997-10-01 00:00:00
abstract：:Dual photon absorptiometry (DPA) is currently the most widely used method for noninvasive bone mineral density (BMD) measurement of the axial skeleton. Dual energy X-ray absorptiometry (DEXA) is a recently developed technique that uses an X-ray tube as a photon source; it has demonstrated several significant advantage...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF02556250
更新日期：1991-11-01 00:00:00
abstract：:The goals of internal fixation are an accurate reduction and stable fixation in the presence of adequate bony vascularity. This can be achieved by a variety of means including plate fixation. A certain amount of periosteal stripping is necessary for proper open reduction of a fracture and for proper plate application....
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s002239900080
更新日期：1996-07-01 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：:Toxicological studies have demonstrated that intermittent PTH1-34 treatment is associated with an increased incidence of osteosarcoma in Fischer 344 rats. Comet and micronucleus (MN) tests, standard methods to evaluate genotoxic potential of drugs, were used to detect DNA and chromosome breaks, respectively, after PTH...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-010-9396-6
更新日期：2010-11-01 00:00:00
abstract：:Plasma osteocalcin (BGP), growth hormone (GH), and somatomedin C(SmC) were measured in 12 patients with acromegaly [7 clinically active (aA), 5 cured (cA)] and 9 control subjects (C). Basal plasma values for the three parameters were higher in aA than in C and in cA. No significant difference was found between cA and ...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF02555167
更新日期：1988-07-01 00:00:00
abstract：:Acute spinal cord injury is associated with rapid bone loss and an increased risk of fracture. In this double-blind, randomized, placebo-controlled trial, 17 patients were followed for 1 year after administration of either 4 or 5 mg of zoledronic acid or placebo. Bone mineral density (BMD) and structural analyses of t...
journal_title：Calcified tissue international
pub_type： 杂志文章,随机对照试验
doi：10.1007/s00223-007-9012-6
更新日期：2007-05-01 00:00:00
abstract：:To assess whether vertebral fractures are associated with osteopenia in chronic alcoholic patients, a transversal study was carried out in 76 chronic alcoholic males and 62 age-matched healthy males. Lumbar bone mineral density (BMD) by dual photon absorptiometry and spinal chest X-ray films were done in all patients....
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/BF00298430
更新日期：1995-08-01 00:00:00
abstract：:Aging is associated with an increase in circulating inflammatory factors. One, the cytokine stromal cell-derived factor 1 (SDF-1 or CXCL12), is critical to stem cell mobilization, migration, and homing as well as to bone marrow stem cell (BMSC), osteoblast, and osteoclast function. SDF-1 has pleiotropic roles in bone ...
journal_title：Calcified tissue international
pub_type： 杂志文章
doi：10.1007/s00223-017-0245-8
更新日期：2017-06-01 00:00:00
