Abstract:
OBJECTIVE:To summarize controlled trials examining the effect of calcium on bone density and fractures in postmenopausal women. DATA SOURCE:We searched MEDLINE and EMBASE up to 1998 and the Cochrane Controlled Register up to 2000, and we examined citations of relevant articles and proceedings of international meetings. We contacted osteoporosis investigators to identify additional studies, and primary authors for unpublished data. STUDY SELECTION:We included 15 trials (1806 patients) that randomized postmenopausal women to calcium supplementation or usual calcium intake in the diet and reported bone mineral density of the total body, vertebral spine, hip, or forearm, or recorded the number of fractures, and followed patients for at least 1 yr. DATA EXTRACTION:For each trial, three independent reviewers assessed the methodological quality and extracted data. DATA SYNTHESIS:We found calcium to be more effective than placebo in reducing rates of bone loss after two or more years of treatment. The pooled difference in percentage change from baseline was 2.05% [95% confidence interval (CI) 0.24-3.86] for total body bone density, 1.66% (95% CI 0.92-2.39) for the lumbar spine, 1.64% (95% CI 0.70-2.57) for the hip, and 1.91% (95% CI 0.33-3.50) for the distal radius. The relative risk (RR) of fractures of the vertebrae was 0.77, with a wide CI (95% CI 0.54-1.09); the RR for nonvertebral fractures was 0.86 (95% CI 0.43-1.72). CONCLUSIONS:Calcium supplementation alone has a small positive effect on bone density. The data show a trend toward reduction in vertebral fractures, but do not meaningfully address the possible effect of calcium on reducing the incidence of nonvertebral fractures.
journal_name
Endocr Revjournal_title
Endocrine reviewsauthors
Shea B,Wells G,Cranney A,Zytaruk N,Robinson V,Griffith L,Ortiz Z,Peterson J,Adachi J,Tugwell P,Guyatt G,Osteoporosis Methodology Group and The Osteoporosis Research Advisory Group.doi
10.1210/er.2001-7002subject
Has Abstractpub_date
2002-08-01 00:00:00pages
552-9issue
4eissn
0163-769Xissn
1945-7189journal_volume
23pub_type
杂志文章,meta分析,评审abstract::To allow selection of embryos for transfer after in vitro fertilization, ovarian stimulation is usually carried out with exogenous gonadotropins. To compensate for changes induced by stimulation, GnRH analog cotreatment, oral contraceptive pretreatment, late follicular phase human chorionic gonadotropin, and luteal ph...
journal_title:Endocrine reviews
pub_type: 历史文章,杂志文章,评审
doi:10.1210/er.2005-0015
更新日期:2006-04-01 00:00:00
abstract::This paper has reviewed current knowledge of clinical, biochemical, and morphological manifestations of extracranial GRH-producing tumors. Excessive GRH release stimulates pituitary somatotrophs causing elevation of blood GH levels and acromegaly. In some patients with GRH-containing tumor, blood GH concentrations are...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/edrv-9-3-357
更新日期:1988-08-01 00:00:00
abstract::Spermatogenesis is the process by which a single spermatogonium develops into 256 spermatozoa, one of which will fertilize the ovum. Since the 1950s when the stages of the epithelial cycle were first described, reproductive biologists have been in pursuit of one question: How can a spermatogonium traverse the epitheli...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2003-0022
更新日期:2004-10-01 00:00:00
abstract::Bile acids derived from cholesterol and oxysterols derived from cholesterol and bile acid synthesis pathways are signaling molecules that regulate cholesterol homeostasis in mammals. Many nuclear receptors play pivotal roles in the regulation of bile acid and cholesterol metabolism. Bile acids activate the farnesoid X...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2000-0035
更新日期:2002-08-01 00:00:00
abstract::The vitamin D endocrine system is essential for calcium and bone homeostasis. The precise mode of action and the full spectrum of activities of the vitamin D hormone, 1,25-dihydroxyvitamin D [1,25-(OH)(2)D], can now be better evaluated by critical analysis of mice with engineered deletion of the vitamin D receptor (VD...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2008-0004
更新日期:2008-10-01 00:00:00
abstract::The endocrine functions of the adipose organ are widely studied at this stage. The adipose organ, and in particular adipocytes, communicate with almost all other organs. Although some adipose tissue pads assume the functions as distinct "miniorgans," adipocytes can also be present in smaller numbers interspersed with ...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2006-0033
更新日期:2006-12-01 00:00:00
abstract::Hormones and cytokines regulate many cellular functions by activating the ubiquitous cAMP-dependent protein kinase (A kinase) system. Newly synthesized cAMP molecules bind to regulatory (R) subunits in A kinase holoenzymes, causing them to release their catalytic (C) subunits. These free C subunits then phosphorylate ...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/edrv-14-5-632
更新日期:1993-10-01 00:00:00
abstract::This review presents a comprehensive discussion of the clinical condition of delayed puberty, a common presentation to the pediatric endocrinologist, which may present both diagnostic and prognostic challenges. Our understanding of the genetic control of pubertal timing has advanced thanks to active investigation in t...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2018-00248
更新日期:2019-10-01 00:00:00
abstract::The secretion of glucocorticoids (GCs) is a classic endocrine response to stress. Despite that, it remains controversial as to what purpose GCs serve at such times. One view, stretching back to the time of Hans Selye, posits that GCs help mediate the ongoing or pending stress response, either via basal levels of GCs p...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/edrv.21.1.0389
更新日期:2000-02-01 00:00:00
abstract::Hippo signaling is an evolutionarily conserved pathway that critically regulates development and homeostasis of various tissues in response to a wide range of extracellular and intracellular signals. As an emerging important player in many diseases, the Hippo pathway is also involved in the pathophysiology of diabetes...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2017-00167
更新日期:2018-02-01 00:00:00
abstract::Human parturition is a complex process involving interactions between the myometrium and signals derived from the placenta, fetal membranes, and fetus. Signals originating from fetal membranes are crucial components that trigger parturition, which is clearly illustrated by the labor-initiating consequence of membrane ...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2017-00188
更新日期:2018-06-01 00:00:00
abstract::Steroidogenesis entails processes by which cholesterol is converted to biologically active steroid hormones. Whereas most endocrine texts discuss adrenal, ovarian, testicular, placental, and other steroidogenic processes in a gland-specific fashion, steroidogenesis is better understood as a single process that is repe...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2010-0013
更新日期:2011-02-01 00:00:00
abstract::Long noncoding RNAs (lncRNAs) are a relatively poorly understood class of RNAs with little or no coding capacity transcribed from a set of incompletely annotated genes. They have received considerable attention in the past few years and are emerging as potentially important players in biological regulation. Here we di...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2014-1034
更新日期:2015-02-01 00:00:00
abstract::Thyroid-associated ophthalmopathy (TAO) is a complex disease process presumed to emerge from autoimmunity occurring in the thyroid gland, most frequently in Graves disease (GD). It is disfiguring and potentially blinding, culminating in orbital tissue remodeling and disruption of function of structures adjacent to the...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2018-00066
更新日期:2019-02-01 00:00:00
abstract::The past few years have provided substantial evidence for the vital role of the local tumor microenvironment for various aspects of tumor progression. With obesity and its pathophysiological sequelae still on the rise, the adipocyte is increasingly moving center stage in the context of tumor stroma-related studies. To...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2010-0030
更新日期:2011-08-01 00:00:00
abstract::Several components of the GH axis are involved in tumor progression, and GH-induced intracellular signaling has been strongly associated with breast cancer susceptibility in genome-wide association studies. In the general population, high IGF-I levels and low IGF-binding protein-3 levels within the normal range are as...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2018-00166
更新日期:2019-04-01 00:00:00
abstract::In recent years, much interest has been devoted to defining the role of the IGF system in the nervous system. The ubiquitous IGFs, their cell membrane receptors, and their carrier binding proteins, the IGFBPs, are expressed early in the development of the nervous system and are therefore considered to play a key role ...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2004-0024
更新日期:2005-12-01 00:00:00
abstract::Gut hormones signal to the central nervous system to influence energy homeostasis. Evidence supports the existence of a system in the gut that senses the presence of food in the gastrointestinal tract and signals to the brain via neural and endocrine mechanisms to regulate short-term appetite and satiety. Recent evide...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2006-0028
更新日期:2006-12-01 00:00:00
abstract::Investigations of biological programs that are controlled by gene transcription have mainly studied the regulation of transcription factors. However, there are examples in which the primary focus of biological regulation is at the level of a transcriptional coactivator. We have reviewed here the molecular mechanisms a...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2002-0012
更新日期:2003-02-01 00:00:00
abstract::Immune checkpoints are small molecules expressed by immune cells that play critical roles in maintaining immune homeostasis. Targeting the immune checkpoints cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) and programmed death 1 (PD-1) with inhibitory antibodies has demonstrated effective and durable antitumor ac...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2018-00006
更新日期:2019-02-01 00:00:00
abstract::There is a large body of literature showing that prolactin (PRL) exerts growth-promoting activities in breast cancer, and possibly in prostate cancer and prostate hyperplasia. In addition, increasing evidence argues for the involvement of locally produced (autocrine) PRL, perhaps even more than pituitary-secreted (end...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2004-0016
更新日期:2005-05-01 00:00:00
abstract::In human beings, two forms of GnRH, termed GnRH-I and GnRH-II, encoded by separate genes have been identified. Although these hormones share comparable cDNA and genomic structures, their tissue distribution and regulation of gene expression are significantly dissimilar. The actions of GnRH are mediated by the GnRH rec...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
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更新日期:2005-04-01 00:00:00
abstract::Insulin signaling plays a physiological role in traditional insulin target tissues controlling glucose homeostasis as well as in pancreatic β-cells and in the endothelium. Insulin signaling abnormalities may, therefore, be pathogenic for insulin resistance, impaired insulin secretion, endothelial dysfunction, and even...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2011-1042
更新日期:2012-08-01 00:00:00
abstract::Disruption of the GH receptor (GHR) gene eliminates GH-induced intracellular signaling and, thus, its biological actions. Therefore, the GHR gene disrupted mouse (GHR-/-) has been and is a valuable tool for helping to define various parameters of GH physiology. Since its creation in 1995, this mouse strain has been us...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2010-0009
更新日期:2011-06-01 00:00:00
abstract::Insulin degradation is a regulated process that plays a role in controlling insulin action by removing and inactivating the hormone. Abnormalities in insulin clearance and degradation are present in various pathological conditions including type 2 diabetes and obesity and may be important in producing clinical problem...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/edrv.19.5.0349
更新日期:1998-10-01 00:00:00
abstract::The discovery of myostatin and our introduction to the "Mighty Mouse" over a decade ago spurred both basic and applied research and impacted popular culture as well. The myostatin-null genotype produces "double muscling" in mice and livestock and was recently described in a child. The field's rapid growth is by no mea...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2008-0003
更新日期:2008-08-01 00:00:00
abstract::Members of the TGF-beta superfamily, which includes TGF-betas, growth differentiation factors, bone morphogenetic proteins, activins, inhibins, and glial cell line-derived neurotrophic factor, are synthesized as prepropeptide precursors and then processed and secreted as homodimers or heterodimers. Most ligands of the...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2002-0003
更新日期:2002-12-01 00:00:00
abstract::Iodine deficiency has multiple adverse effects in humans, termed iodine deficiency disorders, due to inadequate thyroid hormone production. Globally, it is estimated that 2 billion individuals have an insufficient iodine intake, and South Asia and sub-Saharan Africa are particularly affected. However, about 50% of Eur...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2009-0011
更新日期:2009-06-01 00:00:00
abstract::Skeletal homeostasis is determined by systemic hormones and local factors. Bone morphogenetic proteins (BMP) are unique because they induce the differentiation of mesenchymal cells toward cells of the osteoblastic lineage and also enhance the differentiated function of the osteoblast. However, the activity of BMPs nee...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
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更新日期:2003-04-01 00:00:00
abstract::In humans and other mammalian species, the pool of resting primordial follicles serves as the source of developing follicles and fertilizable ova for the entire length of female reproductive life. One question that has intrigued biologists is: what are the mechanisms controlling the activation of dormant primordial fo...
journal_title:Endocrine reviews
pub_type: 杂志文章,评审
doi:10.1210/er.2008-0048
更新日期:2009-08-01 00:00:00