Abstract:
:Osteoclastic bone resorption can be induced within the auditory bulla of the Mongolian gerbil by minute increases in air pressure. The objective of this study was to determine the rate at which osteoclasts are induced in areas of resorption and to compare the rate of osteoblast recruitment. Stainless steel tubes were implanted into the middle ears of 31 male gerbils through which a static pressure of 10 mm Hg above atmospheric was applied. The animals were killed at intervals (0, 1, 2, 4, 6, and 8 days) and the ventral wall of the bulla was studied histomorphometrically. The osteoclast area and osteoclast number were measured along the inner surface of the bone of the bulla; the activity of osteoblasts of the outer surface was also estimated. A significant increase in osteoclasts was found over time (P less than 0.0001). There was no significant increase in osteoclasts at 1 day (P = 0.5) but at 2, 4, 6, and 8 days there was a significant increase (P less than 0.03). Osteoblast activity on the outside of the bulla wall paralleled osteoclast activity. In this quantifiable, experimental system, a localized modeling process may be induced within 2 days without the confounding elements of localized trauma or inflammation inherent in other models of localized bone remodeling.
journal_name
Calcif Tissue Intjournal_title
Calcified tissue internationalauthors
Chole RA,Chan DEdoi
10.1007/BF02556026subject
Has Abstractpub_date
1989-11-01 00:00:00pages
318-23issue
5eissn
0171-967Xissn
1432-0827journal_volume
45pub_type
杂志文章abstract::The native human parathyroid hormone, hPTH-(1-84), and certain carboxyl truncated analogs such as hPTH-(1-34) and even smaller fragments such as hPTH-(1-31)NH2, [Leu27]cyclo(Glu22-Lys26)hPTH-(1-31)NH2, and hPTH-(1-30)NH2 stimulate femoral trabecular and cortical bone growth in ovariectomized (OVX) rats. Here we show t...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002230010061
更新日期:2000-04-01 00:00:00
abstract::The mechanism whereby liposomal entrapment enhances the hypocalcemic effect of calcitonin (CT) was evaluated in the rat. Phosphatidylcholine (PC) and PC plus cholesterol (PCC) preparations of large multilammelar vesicles (MLV) and small unilammelar vesicles (SUV) were used to entrap human calcitonin (hCT). The effect ...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02555889
更新日期:1990-12-01 00:00:00
abstract::Enhanced osteoclast formation and function is a fundamental cause of alterations to bone structure and plays an important role in several diseases impairing bone quality. Recent work revealed that TRP calcium channels 3 and 6 might play a special role in this context. By analyzing the bone phenotype of TRPC6-deficient...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-020-00673-8
更新日期:2020-06-01 00:00:00
abstract::The values of in vivo T1 relaxation time (T1) of phosphorus atoms of wrist bone have been measured by phosphorus-31 magnetic resonance spectroscopy (MRS) in 65 menopausal women separated into three groups: (1) age-matched women without any paraclinical or clinical osteoporosis; (2) patients with paraclinical osteoporo...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF00298583
更新日期:1995-06-01 00:00:00
abstract::Our objective was to assess the effects of HIV infection and antiretroviral therapy on trabecular and cortical microarchitecture in postmenopausal minority women. A subgroup of 106 (46 HIV-infected, 60 uninfected) postmenopausal Hispanic and African American women from an established cohort had areal bone mineral dens...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-013-9716-8
更新日期:2013-06-01 00:00:00
abstract::Studies suggest that long-term use of proton pump inhibitors (PPIs) may be associated with an increased risk of fracture. However, the role of medication adherence in this association is not fully understood. A retrospective cohort study was conducted to examine the relationship between PPI use/adherence and fracture ...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-014-9855-6
更新日期:2014-06-01 00:00:00
abstract::Employing a cytochemical bioassay, we compared parathyroid function in normal and X-linked hypophosphatemic (Hyp) mice. Under basal conditions Hyp mice manifested hypocalcemia and, in accord, had a plasma bioactive parathyroid hormone concentration (3.04 +/- 0.14 pg/ml) significantly greater than that of normals (2.16...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02553712
更新日期:1985-07-01 00:00:00
abstract::Calcium deficiency is a major etiological determinant of rickets in Nigerian children and is accompanied by undermineralization of the developing bone matrix which is composed largely of type I collagen. We have assessed types I and III collagen metabolism by measuring the circulating concentrations of teh N- and C-te...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002239900301
更新日期:1997-08-01 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::This study revealed the distinguished changes of preferential orientation of collagen and apatite and Young's modulus in two different types of osteoporotic bones compared with the normal bone. Little is known about the bone material properties of osteoporotic bones; therefore, we aimed to assess material properties i...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-018-0508-z
更新日期:2019-04-01 00:00:00
abstract::Bone turnover markers (BTMs) are widely used for the management of osteoporosis, and the premenopausal reference range is the target value for the treatment of postmenopausal osteoporosis with antiresorbing agents. Three serum BTMs (serum C-telopeptide of type I collagen [CTX], osteocalcin [OC], and N-terminal propept...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-008-9126-5
更新日期:2008-05-01 00:00:00
abstract::The CYP3A7 enzyme metabolizes some steroid hormones, including dehydroepiandrosterone sulfate (DHEAS). The age-related decline of serum DHEAS levels is believed to contribute to osteoporosis. Previously, the CYP3A7*1C polymorphism has been shown to cause a persistent high CYP3A7 enzyme activity, resulting in lower lev...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-006-0227-8
更新日期:2007-03-01 00:00:00
abstract::The aim of our study was to compare the results provided by the measurement of vertebral and femoral bone mineral density (BMD) for assessing the individual risk of osteoporosis as defined by either low BMD and/or rapid bone loss. Vertebral and femoral BMD were measured twice at a mean interval of 21 months in 85 norm...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF00310196
更新日期:1993-05-01 00:00:00
abstract::Teriparatide (TPTD) is the most widely used anabolic agent in the treatment of patients with osteoporosis although its use is restricted in many countries. A recent randomised trial confirmed that TPTD was superior to risedronate at preventing vertebral fractures over a 2-year period. There is limited information on t...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-019-00563-8
更新日期:2019-08-01 00:00:00
abstract::Non-steroidal anti-inflammatory drugs (NSAID) have been recommended to prevent of heterotopic ossification (HO) after total hip arthroplasty (THA), but debates are still ongoing. The present Bayesian network meta-analysis of randomized clinical trials (RCTs) compared all available pathways of NSAID treatment as prophy...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-020-00763-7
更新日期:2021-02-01 00:00:00
abstract::The purpose of this study was to examine the influence of exercise on the serum concentrations of intact parathyroid hormone (PTH). Serum PTH and plasma lactate were measured in 15 well-trained men, 9 long-distance runners and 6 fire-fighters, during two running exercises. Test one consisted of 40-minute treadmill run...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF00295947
更新日期:1994-04-01 00:00:00
abstract::Allogenous demineralized bone matrix (DBM) represents a potential scaffold for bone tissue engineering due to its close relation in structure and function with autologous bone, but its supply is often restricted by donor availability. Thus, an expanded source of human bone is needed. The aim of this study was to evalu...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-008-9159-9
更新日期:2008-09-01 00:00:00
abstract::Osteoporosis is commonly associated with estrogen deficiency. However, the mechanisms by which the lack of this hormone causes bone loss are poorly understood. The bone structure of the oral cavity seems to be affected by estrogen deficiency, since a delayed healing process after tooth extraction has been observed aft...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-004-0013-4
更新日期:2005-02-01 00:00:00
abstract::The aim of this study was to determine whether forearm bone mineral density (BMD) measurements are affected by clinical risk factors for osteoporosis to the same extent as spine and hip BMD. The study population consisted of 1,009 female patients and volunteers, of whom 238 were premenopausal. Women were placed into s...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-006-0217-x
更新日期:2007-02-01 00:00:00
abstract::A strategy based on high pressure liquid chromatography (HPLC) techniques for the isolation or a principal amelogenin molecule from a single human dentition is described. A partial sequence (33 residues) for this 24 kDa amelogenin is presented and related to earlier studies of human 5 kDa tyrosine-rich amelogenin poly...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02555993
更新日期:1990-08-01 00:00:00
abstract::Energy-dispersive X-ray microanalysis was used to determine calcium/phosphorous (Ca/P) ratios in undecalcified teeth, and the sulfur (S) content of dentin of decalcified teeth from normal patients and patients with familial hypophosphatemia, in an attempt to determine the effect of phosphorus deficiency. The results s...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02555886
更新日期:1990-12-01 00:00:00
abstract::We investigated the effects of conjugated estrogens as an add-back replacement drug, incadronate sodium as a bisphosphonate, and alfacalcidol as a vitamin D(3) analog on femoral bone mineral density (BMD) and bone mineral content (BMC) in female rats chronically treated with the gonadotropin-releasing hormone (GnRH) a...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002239900675
更新日期:1999-08-01 00:00:00
abstract::In this study, we demonstrated that type I collagen matrix induced the expression of osteoblastic phenotypes of bone marrow cells, and that antibone sialoprotein (BSP) monoclonal antibody suppressed the expression of these phenotypes. On the other hand, BSP accelerated the expression of osteoblastic phenotypes of bone...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002230010078
更新日期:2000-05-01 00:00:00
abstract::The binding of prostaglandin E2 (PGE2) to bone cells was studied to provide direct evidence for the existence of specific receptors in bone. Bone cells were isolated by collagenase digestion of fetal and newborn rat calvaria. Isolated cells were incubated with 3H-PGE2 and collected on Millipore filters. Specific bindi...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02405038
更新日期:1983-01-01 00:00:00
abstract::Atomic force microscopy (AFM) was used to obtain three-dimensional images of isolated mineralites extracted from young postnatal bovine bone. The mean mineralite size is 9 nm x 6 nm x 2.0 nm, significantly shorter and thicker than the mineralites of mature bovine bone measured by the same technique. Mineralites of the...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-002-1077-7
更新日期:2003-05-01 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::This study sought to confirm that osteoblasts of C3H/HeJ (C3H) mice, which have higher differentiation status and bone-forming ability compared to C57BL/6J (B6) osteoblasts, also have a lower apoptosis level and to test whether the higher differentiation status and bone-forming ability of C3H osteoblasts were related ...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-005-0303-5
更新日期:2006-05-01 00:00:00
abstract::A whole-body counter was used to measure the retention and distribution of radioactivity along the longitudinal axis of the body during 10 days after the intravenous injection of 50 microCi of 47Ca. These data and the simultaneous measurements of the serum specific activity allowed us to calculate, by the Bauer-Carlss...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02405001
更新日期:1983-01-01 00:00:00
abstract::The metacarpal bone mineral density (BMD) and metacarpal index (MCI) of the second metacarpal bone were measured by computed X-ray densitometry (CXD) (Teijin Ltd., Tokyo), which we have established with the development of microdensitometry of radiographs. In this study, we evaluated the basic attributes of this CXD me...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF00299308
更新日期:1994-11-01 00:00:00
abstract::Micro-computed tomography (microCT) has become a standard tool for the evaluation of bone morphology in preclinical studies. Unfortunately, the user-dependent definition of contour lines that separate trabecular from cortical bone is not only extremely time-consuming but may also represent a source of data bias and in...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-007-9063-8
更新日期:2007-10-01 00:00:00