Abstract:
:We separated osteoclasts from bone and observed the effect of several known and potential mediators of the control of bone resorption on their cytoplasmic motility. We already found that calcitonin (CT), a hormone that inhibits bone resorption, regularly causes complete inhibition of cytoplasmic motility, specific for osteoclasts, through a trypsin-sensitive membrane receptor [1]. We report here that prostaglandin I2 (PGI2) and dibutyryl cyclic AMP induce an identical change in osteoclastic behavior. We found that theophylline, which inhibits intracellular cyclic AMP degradation, and which itself had no effect on osteoclastic motility, potentiated the cytoplasmic inhibition caused by CT, PGI2, and cyclic AMP. This suggests that PGI2 and CT cause cytoplasmic quiescence by increasing the intracellular level of cyclic AMP, a view compatible with the known ability of CT to increase cyclic AMP in bone [2]. Parathyroid hormone (PTH), PGE2, and 1,25 dihydroxycholecalciferol (1,25 (OH)2D3), hormones known to stimulate osteoclasts, did not stimulate the activity of either active or quiescent isolated osteoclasts. The undoubted ability of these hormones to stimulate osteoclastic activity in vivo may therefore be mediated through a primary hormonal interaction with another cell type.
journal_name
Calcif Tissue Intjournal_title
Calcified tissue internationalauthors
Chambers TJ,Dunn CJdoi
10.1007/BF02405095subject
Has Abstractpub_date
1983-07-01 00:00:00pages
566-70issue
4-5eissn
0171-967Xissn
1432-0827journal_volume
35pub_type
杂志文章abstract::Bone resorption and formation in terms of milligram of calcium deposited into and released from whole humerus of 15-23 weeks old male rats were assessed, via linear least-squares regression analysis of change in calcium content and 3H-tetracycline kinetics of the bone. The rate of resorption was 0.376 mg calcium per d...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02555009
更新日期:1990-04-01 00:00:00
abstract::We hypothesized that reactive oxygen species play an important role in avascular/ischemic osteonecrosis. When isolated chick osteocytes were cultured with hydrogen peroxide, annexin V binding, which is the earliest marker of apoptosis, increased in a dose-dependent fashion. Hydrogen peroxide also induced the activatio...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-001-1110-2
更新日期:2002-09-01 00:00:00
abstract::Quantitative ultrasound (US) measurements have been shown to be a new technique assessing bone status. This study aimed to assess a new US instrument, the DBM Sonic 1200(R) (IGEA) which permits the measurement of the speed of sound in the proximal phalanges (SOSp) of the hand. The results obtained were compared with D...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002239900574
更新日期:1999-01-01 00:00:00
abstract::Quantitative trait locus analysis can be used to identify genes critically involved in biological processes. No such analysis has been applied to identifying genes that control bone fracture healing. To determine the feasibility of such an approach, healing of femur fractures was measured between C57BL/6, DBA/2, and C...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-008-9144-3
更新日期:2008-06-01 00:00:00
abstract::We studied the most complete skeletons found in an excavation from the 14th and 15th century in central Stockholm. One hundred eighty-seven were from men and 156 from women: 241 individuals were estimated to be between 20 and 39 and 102 between 40 and 59 years old at death. We examined the bones radiographically and b...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF00301601
更新日期:1995-05-01 00:00:00
abstract::To investigate the effect of low doses of intranasal salmon calcitonin on plasma cyclic AMP (cAMP) and serum ionized calcium, 40 healthy postmenopausal women were randomized to receive a single dose of either placebo or 50, 100, or 200 IU of salmon calcitonin as a nasal spray. Blood samples were collected throughout a...
journal_title:Calcified tissue international
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/BF02555817
更新日期:1990-01-01 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::Previous observational studies have identified various risk factors associated with the development of osteoporosis, including sex hormone-binding globulin (SHBG). The aim of this study was to determine the potential causal effects of circulating SHBG concentrations on bone mineral density (BMD). Two-sample Mendelian ...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-020-00770-8
更新日期:2020-10-17 00:00:00
abstract::A morphological and electron microscopic study of bone from patients with osteogenesis imperfecta (OI) has been performed. Bone from OI patients from various anatomical sites has been compared with that from normal, age-, site-, and sex-matched controls. The morphology of OI bone appeared variable among patients and s...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02526881
更新日期:1996-03-01 00:00:00
abstract::The effect of ascorbic acid deficiency on bone metabolism was evaluated using the ascorbate-requiring Osteogenic Disorder Shionogi (ODS) rat model. Ascorbic acid (Asc)-deficient rats gained body weight in a manner similar to Asc-supplemented rats (control) during 3 weeks, but began to lose weight during the 4th week o...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-002-2040-3
更新日期:2003-08-01 00:00:00
abstract::Postmenopausal osteoporosis induced by estrogen deficiency causes inadequate new bone formation and affects millions of women worldwide. Melatonin can improve bone mineral density at the femoral neck in postmenopausal women with osteopenia. This study aimed to investigate the mechanism of melatonin in estrogen deficie...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-018-0428-y
更新日期:2018-10-01 00:00:00
abstract::The effect of zinc on in vitro deoxyribonucleic acid (DNA) synthesis activity in the femoral-diaphyseal and metaphyseal tissues of newborn rats was investigated to determine a role of zinc in bone growth. In vitro DNA synthesis was assayed in a reaction mixture containing the 100 g centrifugation supernatant, which in...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-001-2010-1
更新日期:2001-09-01 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::Gallium nitrate (GaN) reduces cancer-related hypercalcemia and inhibits bone resorption in vitro. This study investigated the effects of chronic GaN administration on bone, kidney, and parathyroid gland activity of growing rats. Experimental animals received GaN (1.75 mg elemental gallium i.p. QOD X 8, Ga+), and contr...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02555260
更新日期:1987-05-01 00:00:00
abstract::We compared indices of three-dimensional microstructure of iliac trabecular bone between 26 patients with vertebral compression fractures due to postmenopausal osteoporosis and 24 control subjects without vertebral fracture, who were matched for age, sex, race, menopausal status, and several densitometric and histolog...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02554913
更新日期:1985-12-01 00:00:00
abstract::Raman spectroscopy has been used to demonstrate, for the first time, that calcium mineralization in the core of the major lateral teeth of the chiton Acanthopleura echinata takes place as an ordered process, with crystalline carbonated apatite being the first mineral deposited. Deposition begins at the top of the toot...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002230001156
更新日期:2000-11-01 00:00:00
abstract::Because of the variability of collagen crosslinks, their use as markers for bone resorption is often criticized. We hypothesized that the variability could be reduced by collecting urine for 24 hours (or longer) instead of using single voids, and by not normalizing to creatinine. Urine samples were collected from 22 h...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-003-0149-7
更新日期:2004-04-01 00:00:00
abstract::Sustained exposure to high levels of parathyroid hormone (PTH), as observed in hyperparathyroidism, is catabolic to bone. The increase in the RANKL/OPG ratio in response to continuous PTH, resulting in increased osteoclastogenesis, is well established. However, the effects of prolonged PTH exposure on key regulators o...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-016-0176-9
更新日期:2016-11-01 00:00:00
abstract::Differences in trabecular and cortical bone loss have been demonstrated clinically, but differences in bone loss at different skeletal sites remain unclear. We examined regional variations in bone loss histomorphometrically in two strains of mice in which osteopenia progresses spontaneously: tiptoe-walking Yoshimura (...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002239900455
更新日期:1998-05-01 00:00:00
abstract::We examined differences in patients' survival after hip fracture (HF) and risk for subsequent HF among patients treated with oral and intravenous bisphosphonates (oBPs, iBPs), denosumab (DMAB), and patients without therapy. We used data from all patients in Austria aged ≥ 50 who sustained a HF between 2012 and 2017 an...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-019-00611-3
更新日期:2019-12-01 00:00:00
abstract::The evidence now strongly supports a central role for oestrogen in the maintenance of the normal female skeleton. Loss of endogenous oestrogen leads to a period of accelerated bone loss which can be prevented with appropriate oestrogen replacement. The route of administration is not important provided adequate dosages...
journal_title:Calcified tissue international
pub_type: 杂志文章,评审
doi:10.1007/BF02555090
更新日期:1991-01-01 00:00:00
abstract::Osteocalcin, the gamma-carboxyglutamic acid-containing protein, which is the most abundant noncollagenous protein of bone and dentin, is considered to play roles in bone formation and remodeling. It is unclear how the gamma-carboxyglutamic acid side-chains in osteocalcin coordinate to Ca2+, since the X-ray structure o...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002230010042
更新日期:2001-12-01 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::A continuous flow organ culture system (CFCS) was used to determine the effect of ascorbic acid on the synthesis of collagen and noncollagenous protein by bone of the alveolar process and periodontal ligament in organ cultures of adult mouse periodontium. For the last 24 h of 2 day cultures, 5 microCi/ml 3H-proline wa...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02411276
更新日期:1982-07-01 00:00:00
abstract::Bone loss occurs as early as the third decade and its cumulative effect throughout adulthood may impact risk for osteoporosis in later life, however, the genes and environmental factors influencing early bone loss are largely unknown. We investigated the role of genes in the change in bone mineral density (BMD) in par...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-008-9197-3
更新日期:2009-02-01 00:00:00
abstract::The accuracy of a radiographic absorptiometry (RA) technique called digital image processing (DIP), discriminative ability of RA for osteoporotic fracture, and the relationship between RA and dual X-ray absorptiometry (DXA) of the spine and forearm were evaluated. We measured 16 cadaver hands, 32 healthy non-black pre...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002239900400
更新日期:1998-02-01 00:00:00
abstract::High PTH levels increase bone turnover and decrease bone mineral density (BMD). Low plasma 25-hydroxyvitamin D (25OHD) levels cause secondary hyperparathyroidism, but the relative contribution of low 25OHD and high PTH levels on risk of fracture is largely unknown. Within the cohort of women (n = 2,016) included in th...
journal_title:Calcified tissue international
pub_type: 杂志文章,多中心研究
doi:10.1007/s00223-010-9454-0
更新日期:2011-03-01 00:00:00
abstract::Formalin fixation of hard tissues alters the levels of some, but not all, of the parameters routinely measured by bone researchers. Although mineral parameters (ash weight, particle size (beta 1/2 002) and Ca/PO4 ratio) and lipid parameters (total lipid content and composition, extractability, and Ca-acidic phospholip...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02411262
更新日期:1982-07-01 00:00:00
abstract::Roux-en-Y gastric bypass surgery (RYGB) is an effective treatment of morbid obesity, with positive effects on obesity-related complications. The treatment is associated with bone loss, which in turn might increase fracture risk. The aim of this study was to evaluate changes in bone mineral density (BMD) and bone archi...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-015-0091-5
更新日期:2016-03-01 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