Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of medicinal chemistry 24 (1981), S. 1133-1138 
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1432-1440
    Keywords: Renal osteodystrophy ; Child ; Metabolites of vitamin D ; Secondary hyperparathyroidism ; Renale Osteodystrophie ; Kind ; Vitamin-D-Metaboliten ; Sekundärer Hyperparathyreoidismus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 1. Durch die Behandlung mit 1,25-DHCC gelingt es nach unseren Untersuchungsergebnissen einen Anstieg des Serumkalziumspiegels zu erhalten, die PTH-Synthese zu blockieren und die intestinale Kalziumresorption zu verbessern. 2. Die Fibroosteoclasie und die aktuellen Zeichen der Knochenresorption können unter der Therapie vollständig behoben bzw. verbessert werden. 3. Bei der Behandlung dialysierter Kinder mit 1,25-DHCC konnten wir eine Verbesserung der Osteoidose in Fällen mit erheblicher Mineralisationsstörung beobachten. 4. Die Zahl der Osteoblasten wird unter der Therapie erheblich reduziert, in den meisten Fällen beobachteten wir Werte im Bereich der unteren Norm oder niedriger. Dies bedeutet in Bezug auf eine Langzeittherapie die Reduktion der Knochenformation mit Gefahr der Osteopenie. 5. Die Entwicklung einer gefährlichen Hyperkalzämie bei gleichzeitiger Imbalance im Serumphosphathaushalt muß streng beachtet werden. Wir beobachteten aufgrund dieser Kalzium- und Phosphatstoffwechselstörungen erhebliche Kalzifikationen im Limbusbereich der Augen. 6. Aufgrund dieser Befunde sollte 1,25-DHCC individuell in niedriger Dosierung nur bei Kindern mit histologisch nachgewiesener schwerer renaler Osteodystrophie verwandt werden, sofern eine engmaschige kontinuierliche Überwachung sämtlicher Stoffwechselparameter möglich ist. 7. Eine Verbesserung des Körperwachstums konnte unter 1,25-DHCC-Behandlung nicht beobachtet werden.
    Notes: Summary Growth arrest and renal osteodystrophy are major problems in renal insufficiency of children. The present report describes our experiences in managing renal osteodystrophy in 14 dialyzed children using 1,25-DHCC for 12 months. Values in plasma of Ca, P, Mg, alkaline phosphatase, iPTH, 25-OH-D, and 1,25-DHCC were determined regulary. Skeletal X-rays and analysis of iliac crest biopsies were obtained in each child. In treatment with 1,25-DHCC episodes of severe but reversible hypercalcemia occurred. Alkaline phosphatase and iPTH normalized completely. Radiographic examinations revealed marked improvement. Histological signs of fibro-osteoclasia and resorptive defects disappeared but there was no recovery of osteomalacia. A reduction of osteoblast population and of bone transformation was obvious. 1,25-DHCC failed to normalize growth in uremic children. In short, neither vitamin D nor 1,25-DHCC can guarantee complete recovery of renal osteodystrophy and growth arrest in uremic children.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 62 (1984), S. 613-620 
    ISSN: 1432-1440
    Keywords: Parathyroid carcinoma ; Diagnosis of parathyroid carcinoma ; Therapeutic implications
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The parathyroid carcinoma is a rare cause of primary hyperparathyroidism. It deserves special attention in regard to diagnosis and treatment. Within a period of 10 years we observed 117 patients with primary hyperparathyroidism (pHPT) at the University Hospitals of Ulm and Heidelberg. In five patients a parathyroid carcinoma was found, corresponding to an incidence of 4.4%. In four of five patients no clinical signs were evident preoperatively indicating a parathyroid malignancy.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1433-2965
    Keywords: Key words:Bone mineral density – Differential diagnosis – Fractures – Osteoarthritis – Osteoporosis – Vertebral deformity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract: Morphometric methods have been developed for standardized assessment of vertebral deformities in clinical and epidemiologic studies of spinal osteoporosis. However, vertebral deformity may be caused by a variety of other conditions. To examine the validity of morphometrically assessed vertebral deformities as an index of osteoporotic vertebral fractures, we developed an algorithm for radiological differential classification (RDC) based on a combination of quantitative and qualitative assessment of lateral spinal radiographs. Radiographs were obtained in a population of 50- to 80-year-old German women (n= 283) and men (n = 297) surveyed in the context of the European Vertebral Osteoporosis Study (EVOS). Morphometric methods (Eastell 3 SD and 4 SD criteria, McCloskey) were validated against RDC and against bone mineral density (BMD) at the femur and the lumbar spine. According to RDC 36 persons (6.2%) had at least one osteoporotic vertebral fracture; among 516 (88.9%) nonosteoporotics 154 had severe spondylosis, 132 had other spinal disease and 219 had normal findings; 14 persons (2.4%) could not be unequivocally classified. The prevalence of morphometrically assessed vertebral deformities ranged from 7.3% to 19.2% in women and from 3.5% to 16.6% in men, depending on the stringency of the morphometric criteria. The agreement between RDC and morphometric methods was poor. In men, 62–86% of cases with vertebral deformities were classified as nonosteoporotic (severe spondylosis or other spinal disease) by RDC, compared with 31–68% in women. Among these, most had wedge deformities of the thoracic spine. On the other hand, up to 80% of osteoporotic vertebral fractures in men and up to 48% in women were missed by morphometry, in particular endplate fractures at the lumbar spine. In the group with osteoporotic vertebral fractures by RDC the proportion of persons with osteoporosis according to the WHO criteria (T-score 〈−2.5 SD) was 90.0% in women and 86.6% in men, compared with 67.9–85.0% in women and 20.8–50.0% in men with vertebral deformities by various methods. Although vertebral deformities by most definitions were significantly and inversely related to BMD as a continuous variable in both sexes [OR; 95% CI ranged between (1.70; 1.07–2.70) and (3.69; 1.33–10.25)], a much stronger association existed between BMD and osteoporotic fractures defined by RDC [OR; 95% CI between (4.85; 2.30–10.24) and (15.40; 4.65–51.02)]. In the nonosteoporotic group individuals with severe spondylosis had significantly higher BMD values at the femoral neck (p 〈0.01) and lumbar spine (p 〈0.0004) compared with the normal group. On the basis of internal (RDC) and external (BMD) validation, we conclude that assessment of vertebral osteoporotic fracture by quantitative methods alone will result in considerable misclassification, especially in men. Criteria for differential diagnosis as used within RDC can be helpful for a standardized subclassification of vertebral deformities in studies of spinal osteoporosis.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Research in experimental medicine 160 (1973), S. 152-165 
    ISSN: 1433-8580
    Keywords: Pancreatic secretion in man ; Secretin ; Cholecystokininpancreozymin ; Hypercalcemia ; Hypocalcemia ; Calcitonin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The influences of acute changes of the serum calcium and of calcitonin (CT) on the exocrine pancreatic function have been studied in man. During stimulation with secretin and cholecystokinin-pancreozymin (CCK-PZ) Ca++-glucolactobionate, Na2-EDTA, porcine and human synthetic CT were infused i.v. Hypercalcemia provoked an increase of enzyme secretion under unstimulated and secretin stimulated conditions; however, in the case of CCK-PZ administration enzyme output was not altered. EDTA-hypocalcemia inhibited pancreatic secretion during secretin as well as during CCK-PZ infusions. CT doses above 2 MRCU caused a decrease of enzyme secretion during simultanous secretin/CCK-PZ administration by about 70–80% of the initial value without decreasing serum Ca++; doses of 0.5 MRCU and less were without effect. In none of the experiments bicarbonate secretion was affected. The results show important changes of the pancreatic enzyme secretion during acute hyper- and hypocalcemia, while calcitonin exerts an inhibitory effect during normocalcemia.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 1433-8580
    Keywords: Rat pancreas ; Hypercalcemia ; Hypocalcemia ; Calcitonin ; Rattenpankreas ; Hypercalciämie ; Hypocalciämie ; Calcitonin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die stimulierte exokrine Pankreasfunktion der Ratte läßt sich durch akute Hypercalciämie, ÄDTA-Hypocalciämie oder Calcitoningabe nicht beeinflussen. Dieses Verhalten steht im Gegensatz zur Reaktion des Magens der Ratte auf Calciumreize.
    Notes: Summary In the rat, stimulated exocrine pancreatic secretion is not influenced by acute hypercalcemia, EDTA hypocalcemia or calcitonin administration. This unresponsiveness is in contrast to the reaction of the rat stomach to calcemic challenges.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 301 (1983), S. 526-527 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Pairs of experimental animals of approximately the same weight (6-7 g) were selected after the onset of the photophase on day 3 of the fifth larval instar; one of each pair was starved, the other used as a fed control. At the onset of treatment, 9.2% of phosphorylase was found to be in the active ...
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 6 (1970), S. 143-150 
    ISSN: 1432-0827
    Keywords: Calcitonin ; Bone ; Atrophy ; Formation ; Tetracycline
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Description / Table of Contents: Résumé La patte arrière gauche de trente rattes Sprague-Dawley a été immobilisée par une attelle plâtrée. Dix rattes témoins ont été utilisées (groupe A): les 30 rattes plâtrées ont été réparties en 4 groupes. Le groupe B n'a pas reçu de traitement. Le groupe C a reçu, par injection sous-cutanée quotidienne, 50 MRC mU de calcitonine (préparée par les auteurs) dans 5% de gélatine. Le groupe D a reçu 5% de gélatine. Le groupe E a reçu 50 MRC mU de calcitonine (Ciba), dans 5% de gélatine par jour, en sous-cutanée. Après 6 jours, les fémurs et tibias ont été pesés, radiographiés et étudiés histologiquement. Les os du groupe A sont normaux. Les os des groupes B, C, D et E présentent une ostéoporose d'immobilisation du coté gauche, avec diminution de l'os trabéculaire, sans traduction radiologique. Le traitement à la calcitonine n'a pas inhibé l'ostéoporose. La pression exercée par les attelles plâtrées a induit une apposition périostée, au niveau de quelques tibias. Après traitement à la calcitonine, une apposition augmentée a été observée au niveau des fémurs et tibias. La gélatine, seule, n'a pas eu d'effet. Bien que la calcitonine n'ait pas agi sur l'ostéoporose d'immobilisation, elle semble pourtant favoriser les processus ostéogéniques provoqués par d'autres mécanismes.
    Abstract: Zusammenfassung 30 weibliche Sprague-Dawley-Ratten erhielten zur Immobilisation der linken hinteren Extremität einen Gipsverband. Die Tiere wurden in folgende 4 Gruppen unterteilt: B) keine Therapie. C) 50 MRC mE Calcitonin (eigene Präparation) in 5% Gelatine täglich s.c. D) Lösungsmittel in 5% Gelatine täglich s.c. E) 50 MRC mE Calcitonin (Ciba) in 5% Gelatine täglich s.c. Zusätzlich diente eine Gruppe ohne Gipsverband sowie ohne Therapie als Kontrolle (A). Nach 6 Wochen Versuchsdauer wurden die Femora und Tibiae geröntgt, gewogen und histologisch untersucht. In der Kontrollgruppe(A) bestand kein Unterschied zwischen rechter und linker Seite. In den Gruppen B, C, D und E hatte sich eine deutliche Immobilisationsosteoporose entwickelt (Rarefizierung der Spongiosa des Femurhalses), die röntgenologisch nicht nachgewiesen werden konnte. Die Therapie mit Calcitonin konnte diese Immobilisationsatrophie nicht verhindern. Der mechanische Reiz des Gibsverbandes erzeugte eine periostale Apposition in einigen Tibiae der Gruppen B und D. Nach Gabe von Calcitonin entwickelte sich diese periostale Neubildung in allen Femora und Tibiae der Gruppen C und E. Außerdem war das Ausmaß der Apposition unter Calcitonintherapie wesentlich größer. Das Lösungs-mittel allein hatte keinen Einfluß auf die beschriebenen Veränderungen. Calcitonin konnte die Entwicklung einer Immobilisationsosteoporose nicht verhindern, die Knochenneubildung nach Auslösung durch mechanische Einflüsse wurde dagegen wesentlich verstärkt.
    Notes: Abstract In thirty female Sprague-Dawley rats the left hind leg was immobilized with plaster casts. According to treatment they were divided into the following groups: A) Control, no casts. B) No treatment. C) 50 MRC mU calcitonin (own preparation) in 5% gelatin subcutaneously per day. D) Vehicle alone subcutaneously. E) 50 MRC mU calcitonin (Ciba) in 5% gelatin subcutaneously per day. In addition, untreated rats without casts served as control (group A). After 6 weeks the femora and tibiae were X-rayed, weighed and examined histologically. The bones of the left and right legs did not differ in control group A. In groups B, C, D, and E a disuse osteoporosis had developed in the left legs (rarefication of trabecular bone volume of femur neck) which could not be seen in X-rays. Calcitonin treatment did not prevent the development of the bone atrophy. However, the pressure of the plaster casts had induced a periosteal apposition in some tibiae, and under calcitonin treatment the extent of this new formation in all femora and tibiae was markedly increased. The vehicle alone was ineffective. It can be concluded that whereas calcitonin is without effect on disuse osteoporosis, it probably favours new bone formation which is induced by other mechanisms.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Two different models of chronic C cell stimulation by the hypercalcemic state were compared with respect to their morphology, immunocytochemistry, and biochemistry. In the chronic hypercalcemic state due to the HWCS 256 strain of the Walker tumor C cells show signs of degeneration such as vacuolation, on day 7 after tumor implantation. On day 10 tumor induced hypercalcemia leads to irreversible cell damage with karyopyknosis and karyorhexis. These morphological changes are accompanied by a decline in radioimmunologically measurable calcitonin content of the thyroid and by the loss of response to acute stimulation of C cells. In contrast, in the hypercalcemic state due to 1,25(OH)2D3 intoxication we find an almost complete degranulation of C cells but no signs of degeneration or cell damage, although the thyroid calcitonin content and the calcitonin secretion capacity is greatly reduced. Tumor induced cachexia as a reason for C cell damage in tumor bearing rats could be excluded. Other possible reasons, such as acute overstimulation and tumor factors acting directly on C cells are discussed.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 133 (1980), S. 151-156 
    ISSN: 1432-1076
    Keywords: Calcitonin ; Parathyroid hormone ; Anticonvulsant bone disease ; Urinary cyclic AMP ; Urinary hydroxyproline
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Serum calcitonin (CT) levels and other aspects of calcium metabolism were investigated in 40 epileptic children receiving long-term treatment with phenytoin and/or other anticonvulsant drugs, and in 38 age-matched controls. In the patients CT levels were significantly lower. Immunoreactive parathyroid hormone (iPTH) was significantly elevated exceeding the upper limit of controls in 11 patients. We also observed a highly significant correlation between iPTH and urinary cyclic AMP (cAMP) excretion but a lack of such a correlation with the renal handling of phosphate; this indicates to us a dissociation between cAMP production and phosphaturia. A significant correlation between iPTH levels and urinary hydroxyproline excretion points to a normal action of PTH on bone in the patients. The low CT levels are not due to hypocalcemia and may be directly attributed to the effects of anticonvulsant drugs. As the primary effect of CT is a direct inhibition of PTH induced calcium loss from bone, the drug-related low CT levels in association with secondary hyperparathyroidism possibly is an additional factor in anticonvulsant bone disease.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...