Abstract:
:A 69-year-old man became hypocalcemic under medical observation. The hypocalcemia occurred in the presence of circulating immunoreactive parathyroid hormone (PTH). Common causes of secondary hyperparathyroidism were excluded, as was PTH resistance using PTH infusions. The immunoreactive PTH was examined in detail. PTH immunoreactivity (1) was not retained on a C18 SPE-column, suggesting unusual molecular or physicochemical properties, unlike bona fide PTH; (2) was precipitated with 15% PEG, indicating a molecular size far in excess of native PTH; (3) had an apparent molecular size similar to immunoglobulins on size exclusion chromatography; (4) was retained on affinity chromatography with both Protein A and anti-hIgG antibodies. These data lead us to conclude that the immunoreactive PTH was due to antiidiotypic PTH autoantibodies. No significant quantities of true PTH were found in the patient's serum suggesting that his hypoparathyroidism was a result of PTH deficiency. Autoimmunity might explain the occurrence of both processes if an arrested antiidiotypic antibody cascade is assumed.
journal_name
Calcif Tissue Intjournal_title
Calcified tissue internationalauthors
McElduff A,Lackmann M,Wilkinson Mdoi
10.1007/BF00298499subject
Has Abstractpub_date
1992-08-01 00:00:00pages
121-6issue
2eissn
0171-967Xissn
1432-0827journal_volume
51pub_type
杂志文章abstract::In general, physical exercise appears to have favorable effects on the skeleton. However, a few recent reports have described negative effects, including reduced bone density (BMD) and high bone turnover in runners. The aim of our study was to compare endurance runners to controls with respect to BMD at different site...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002239900366
更新日期:1997-12-01 00:00:00
abstract::Several studies have shown an association between circulating leptin concentration and bone mineral density. but most studies are cross-sectional in design and report findings in women only. We per-formed a population-based longitudinal study relating baseline plasma leptin concentration to bone mass at the lumbar spi...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-002-0017-x
更新日期:2004-05-01 00:00:00
abstract::Human osteoblasts were obtained by migration and proliferation of cells from embryonic membranous bone on glass fragments. Light and electron microscopy analyses revealed a typical osteoblast-like appearance with high protein synthesis activity. The cells showed high alkaline phosphatase activity that was associated w...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF00316880
更新日期:1992-11-01 00:00:00
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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::Icariin, the main constituent of Herba Epimedii, appears to be a promising alternative to classic drugs used to treat osteoporosis. However, the detailed molecular mechanisms of its action and the role of icariin in the cross-talk between osteoblasts and adipocytes remain unclear. The present study was designed to inv...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-016-0138-2
更新日期:2016-08-01 00:00:00
abstract::Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) mRNA levels are commonly used as an internal control to normalize gene expression data based on the belief that this gene is constitutively expressed. However, GAPDH mRNA levels increased by more than 2.5-fold in tibiae of hindlimb unloaded female rats compared to L32 m...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-002-1098-2
更新日期:2004-02-01 00:00:00
abstract::Pregnancy and lactation-associated osteoporosis (PAO) is a rare condition with little known pathophysiology. Most cases are diagnosed in the third trimester of pregnancy or in the first weeks postpartum, particularly in first pregnancies. Vertebral fractures are most commonly observed and characterised by prolonged se...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-015-0028-z
更新日期:2015-10-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF00297190
更新日期:1994-08-01 00:00:00
abstract::The primary objective of the present study was to evaluate the impact of physical activity and muscle strength on bone mineral density (BMD) of the tuberositas tibiae in adolescent boys. Two groups with different exercise levels were compared. The high activity group consisted of 20 subjects (age 15.9 +/- 0.3) from a ...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02509438
更新日期:1996-06-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-015-0072-8
更新日期:2016-02-01 00:00:00
abstract::The purpose of this study was to determine whether human parathyroid hormone (h-PTH) enhances trabecular bone mass and connectivities that were reduced by streptozotocin (STZ)-induced diabetes in rats. Seven-month-old female Wistar rats were injected with STZ or its vehicle intraperitoneally. All vehicle-injected norm...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/pl00005838
更新日期:2000-03-01 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::There is considerable interest in determining whether hypergravity can be used as a countermeasure for microgravity-induced bone loss. This study was conducted on 20 immature male rats in order to investigate possible elastic adaptations of cortical bone in rapidly growing rats exposed to chronic hypergravity. Ten rat...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002239900111
更新日期:1996-09-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02554840
更新日期:1985-03-01 00:00:00
abstract::X-linked hypophosphatemia (XLH) is a rare, inheritable disorder manifesting as rickets in children and osteomalacia in adults. While conventional medical treatment with oral phosphate and alfacalcidol is recommended in childhood, it is undecided whether adults should continue therapy. The aim of this 6-year prospectiv...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-017-0363-3
更新日期:2018-03-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002239900185
更新日期:1997-01-01 00:00:00
abstract::Tumor cells with high skeletal homing affinity express numerous cell surface receptors that bind ligands produced in bone. Upon arrival, these cells survive in the host environment, encompassed in close proximity to bone marrow cells. Interactions between tumor cells and cells of the host microenvironment are essentia...
journal_title:Calcified tissue international
pub_type: 杂志文章,评审
doi:10.1007/s00223-013-9794-7
更新日期:2014-01-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02180245
更新日期:1992-01-01 00:00:00
abstract::We measured serum concentrations of bone Gla-protein (osteocalcin, BGP) and carboxyterminal propeptide of type I procollagen (PICP) in 14 patients with active acromegaly. Blood was collected at 0800 for measurement of bone Gla-protein (BGP), carboxyterminal propeptide of type I procollagen (PICP), and insulin-like gro...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF00298716
更新日期:1993-03-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
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更新日期:1996-10-01 00:00:00
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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
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journal_title:Calcified tissue international
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更新日期:2001-12-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
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更新日期:2009-02-01 00:00:00
abstract::The development of prophylaxes and treatments of bone diseases that can effectively increase the strength of bone as a structure necessitates a better understanding of the time course by which chemical properties define the stiffness of the material during primary and secondary mineralization. It was hypothesized that...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-005-0148-y
更新日期:2005-12-01 00:00:00
abstract::The purpose of this study was to ascertain whether biochemical markers of bone turnover predict bone loss. The survey was carried out in Taiji, Wakayama Prefecture, Japan. From a list of inhabitants aged 40-79 years, 400 participants (50 men and 50 women in each of four age groups) were selected randomly. Bone mineral...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002239900682
更新日期:1999-09-01 00:00:00
abstract::The protein components of biomineralized structures (matrix proteins) are believed to modulate crystal nucleation and growth, and thereby influence the shape and strength of the final structure. The chicken eggshell contains a complex array of distinct matrix proteins. The most abundant of these was purified to homoge...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF00298593
更新日期:1995-06-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002239900607
更新日期:1999-03-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
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更新日期:2004-02-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002230010068
更新日期:2000-05-01 00:00:00
abstract::Men and women (n = 518) receiving moderate-to-high doses of corticosteroids were enrolled in two studies with similar protocols and randomly assigned to receive either placebo or risedronate (2.5 or 5 mg) for 1 year. All patients received daily calcium supplementation (500-1000 mg), and most also received supplemental...
journal_title:Calcified tissue international
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1007/s002230001146
更新日期:2000-10-01 00:00:00