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J Pfeilschifter and R Ziegler

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R. Ziegler and G. Delling

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R. Ziegler and G. Delling

ABSTRACT

In 20 intact and 20 parathyroidectomized female Sprague-Dawley rats, holes with a diameter of 1.8 mm were bored into the proximal third of the tibia. Half the animals served as controls and received the vehicle, the remainder received daily subcutaneous injections of 100 MRCmU calcitonin in 5 % gelatin. Tetracycline labelling was performed weekly. 5 animals from each group were sacrificed after 3 weeks, the other 5 after 6 weeks. Nondecalcified ground sections through the center of the holes were evaluated with an integration ocular; the surface of the newly formed bone was compared with the original size of the defect. The course of the regeneration for the control animals was in agreement with previous data in the literature. Calcitonin treatment produced a distinct acceleration of the healing process. Presumably, the hormone does not only act via inhibition of bone resorption, but also by stimulating the activity of osteoblasts and by increasing the mineralization of the osteoid seams.

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K. FRANK, S. KORTH-SCHÜTZ and R. ZIEGLER

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H. Minne, S. Bellwinkel and R. Ziegler

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K. FRANK, P. VECSEI and R. ZIEGLER

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R. M. Altorfer, W. H. Ziegler and E. R. Froesch

Abstract.

Insulin tolerance tests were carried out in normal subjects and in adrenalectomized (ADX) patients in order to better understand the importance of counter regulatory hormones for the recovery from hypoglycaemia.

Compared to normal subjects recovery of plasma glucose and of free fatty acid levels in adrenalectomized patients is retarded. The levels of glucagon are significantly higher in ADX patients during rest than in normal subjects. As expected, epinephrine and norepinephrine levels did not increase in ADX patients and, accordingly, blood pressure did not change. Growth hormone levels were the same in both groups of subjects. Interestingly, there was no clear-cut difference with regard to subjective symptoms of hypoglycaemia.

It would appear that epinephrine is important for the rapid initial recovery from hypoglycaemia, whereas other hormones play a more important role later on.

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H. Minne, F. Raue, S. Bellwinkel and R. Ziegler

ABSTRACT

The strain of Walker carcinosarcoma 256 described induces hypercalcaemia, hyperphosphataemia and hyperuraemia in tumour bearing rats. Changes in calcium and phosphorus excretion are observed as well as accompanying calcification of soft tissue organs and loss of bone calcium. These changes in calcium metabolism disappear after removal of the tumour, so that long-range action of the tumour can be stated. The results are discussed in comparison with three other animal models of tumour dependent hypercalcaemia.