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Biomedical subjects

U Otto

Publications and source records attributed to U Otto.

At least 91 records · Page 5Linked to original sources
PubMed1981

[Possibilities of cytostatic therapy in adenocarcinoma of the kidney. I. Influence of vinblastine on the growth of transplanted tumors].

The effect of vinblastine sulfate on the acceptance and growth of a very malignant, human adenocarcinoma of the kidney (RCCI) on nude mice was investigated. Without any treatment, this tumor has an acceptance rate of 100%. Subcutaneously transplanted pieces of tumor, measuring 3 X 3 X 1 mm, commence to grow rapidly 1 week after transplantation and reach a diameter of approximately 2 cm, 6 weeks thereafter. Tumors with a diameter of approximately 2 cm, treated during 6 weeks with vinblastine (0.6 mg/kg/week), continued to grow during treatment and thereafter. However, when these growing, pretreated tumors were transplanted on new experimental animals, they either were not accepted by them or grew very slowly. When animals with tumor transplants were treated for 6 weeks with vinblastine (same schedule as above), beginning on the 1st day after transplantation, tumor growth was markedly retarded in every case, but only very seldom the tumor was not accepted.

Adenocarcinoma↗
PubMed1980

[Changes in acid-base and blood gas parameters in relation to storage time and temperature].

The changes of the acid-base- and blood gas parameters were continuously measured under different storage conditions by means of the blood-gas automaton ABL 1 with the help of 40 blood tests of various patients. The results are discussed and a recommendation for practice is given. Apart from the necessary immediate determinations (without any restriction) in the hermetically closed blood tests transported or stored at 0--5 degrees C even three hours after blood taking analyses were got which could still be used clinically. In these cases by the clinicians only a decrease of BE of 2 mmol/l of blood should be taken into consideration. The result render possible a greater usability of the imported blood gas automatons.

Acid-Base Equilibrium↗
PubMed1979

Evaluation of quinidine Lipettes -- a sustained release preparation.

A new sustained release preparation (Lipettes) of quinidine has been evaluated with regard to dissolution, absorption, serum concentration and side-effects. The serum levels of quinidine after single oral doses and after long-term treatment have been compared with the serum levels after administration of some other quinidine preparations on the Swedish market. The side-effects of the sustained release preparations have also been studied. Results indicated that this new sustained release quinidine preparation yields more even serum concentrations of quinidine and seemed to cause less troublesome side-effects than the marketed preparations.

Administration, Oral↗
PubMed1978

[Biochemical and hematological parameters during extracorporeal heterologous perfusion with a porcine liver in acute liver failure].

The authors report on biochemical and hematologic investigations during 6 extracorporeal heterologous perfusions by means of porcine livers in 4 patients suffering from acute hepatic failure. The findings stress the functioning of porcine liver in the extracorporeal system. All livers produced bile with higher values of bilirubin and pH than found in serum. At each perfusion the serum levels of bilirubin decreased. Activities of serum enzymes (GOT, GPT, GLDH, gamma-GT, alkaline phosphatase) and the levels of potassium and sodium behaved differently. This could be explained by different damages of the porcine livers during perfusion which always occur. In 3 perfusions decreased leucocyte counts were observed, explicable immunologically. Extracorporeal heterologous perfusion by means of an alien liver is considered a possible way for temporary replacement of liver function and for removing toxins from the host. Success in single cases with reasonable indication are considered possible. The patients endured the perfusions well. After transitory improvement of their general conditions they succumbed from their severe diseases, though.

Animals↗
PubMed1978

[Morphological studies on swine livers after extracorporeal perfusion].

Morphologic examination of 6 porcine livers after extracorporeal perfusion showed toxic damages of parenchyma with and without necrosis, dilatation and distension of sinusoids with and without hemorrhage and accumulation of inflammatory cells, activated stellate cells, different distributions and loss of glycogen. These findings in the liver could be caused as well by inflow of toxins and cells from the patient, as by increasing damage of the livers under the unphysiological conditions of extracorporeal circulation. The authors point at possible immunologic responses and give their opinion on the question of "vitality" of extracorporeally perfused porcine livers.

Animals↗
PubMed1977

Dose-dependence of the pharmacokinetics of quinidine.

Quinidine was administrated orally to five healthy male volunteers. Doses of 0.2 g t.i.d., 0.3 g t.i.d. and 0.4 g t.i.d. were given for five days with at least four weeks between each test period. The plasma concentration of quinidine was measured before the morning dose on Days 2-5 of treatment, and 1, 2, 4 and 8 h after the morning dose on the 5th day. There was not a linear relationship between the increase in dose and the increase in plasma concentration of quinidine. A dose increase of 50% from 0.6 to 0.9 g quinidine sulphate per day resulted in an increase in steady state concentration of 94%. A further 33% increase in dose, from 0.9 to 1.2 g daily, resulted in a 55% increase in the steady state concentration of quinidine. The results demonstrate dose-dependent pharmacokinetics for quinidine. Possible explanations for the nonlinear pharmacokinetics are discussed.

Administration, Oral↗
PubMed1977

Quantitative alterations of immune serum globulin concentrations in pigs transplanted with a renal allograft.

The variation of immune serum globulin concentrations in 14 pigs was determined after unilateral allogenic renal transplantation. Measures by which it is possible to exert certain immunological influences were not taken. Subsequent to transplantation there was observed a significant decrease in both IgM and IgG which was not correlated with the behaviour of plasma proteins and albumin. Because of the relatively small loss of IgG in the urine of animals on which transplantations were performed, this cannot be considered to be the cause of the decrease in immunoglobulin. It was already on the 3rd day after transplantation that an increase in IgM was observed which after reaching a peak of about + 30% was again followed by a distinct decrease of which the minimum was noted between the 6th and 15th days after transplantation. 10 animals died within the first phase, and in 4 of them death occurred on account of rejection for which histological evidence could be obtained. Although 3 of the 4 animals surviving for a longer period of time were also observed to suffer from distinct rejective crises between the 8th and 15th day after transplantation, they were able to overcome those crises without any therapeutical intervention. After some time, however, they were experiencing another IgM peak (this time greater than + 80%) which was followed, after 3 to 11 days, but the final crisis of rejection and death of the animal. In a few cases, glomerular IgM deposits were found in transplanted kidneys.

Animals↗
PubMed1976

[Morphological, clinical and biochemical findings on the swine-liver after heterologous perfusion for treatment of fatal ammonium bichromate poisoning].

A 23-year old man died after intake of ammonium bichromate. For treatment among others was used the extracorporal heterologous liver perfusion with the liver of a pig. Therefore technical problems, clinical and biochemical findings as well as pathologo-anatomical changes on the livers of pigs after heterologous perfusion are reported and their significance as well as pathogenesis are discussed taking into consideration literary data.

Adult↗
PubMed1975

Effect of stress on the pharmacokinetics of sodium salicylate and quinidine sulphate in rats.

Studies on the influence of foot shock stress on the absorption, distribution and overall serum elimination of sodium salicylate and guinidine sulphate were performed in rats. Foot shock stress was produced by grid floor electrical stimulation. The animals were stressed 1 hr before administration of the drugs and then throughout the experimental period. A significant induced stress was demonstrated by increased blood glucose levels and increased whole brain turnover of noradrenaline. Gastric emptying and intestinal transit as well as tissue levels of the drugs in the serum, heart, brain, liver, muscle and fat were determined. Results were obtained indicating that stress produced a significant increase in the gastro-intestinal absorption of quinidine sulphate while no change in the distribution pattern of overall elimination was noted. On the other hand, sodium salicylate did not show any marked change in the pharmacokinetic parameters during a stressful situation.

Animals↗