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Biomedical subjects

C Finke

Publications and source records attributed to C Finke.

14 recordsLinked to original sources
PubMed1995

Anomalous ABO inheritance explained by ovum transplantation.

BACKGROUND: Modern fertilization techniques can lead to unexpected ABO phenotypes in newborn infants and can raise questions as to maternity, paternity, and infant misidentification. Ovum transplantation can result in an infant with an ABO phenotype that is unexpected, given the birth mother's ABO type. STUDY DESIGN AND METHODS: A group AB, Rh-positive female infant was born to a group O, Rh-positive woman as a result of ovum transplantation. The case report is provided. RESULTS: The birth mother typed group O, Rh-positive both before and after delivery. The infant typed group AB, Rh-positive on cord blood and heelstick specimens. CONCLUSION: Ovum transplantation can result in newborns whose ABO phenotypes are unexpected, in relation to the birth mother's ABO type. To ensure patient privacy, such fertilization techniques may not be clearly documented in the delivery room chart. A complete obstetric history helps prevent repeat phlebotomies, expensive and unnecessary typing studies, and concern of the clinical staff with possible sample or infant misidentification.

ABO Blood-Group System↗
PubMed1987

Effects of rifampicin on the peripheral turnover kinetics of thyroid hormones in mice and in men.

The induction of mixed function hepatic oxygenases by rifampicin is known to increase the metabolic clearance rate (MCR) of T4. By performing T3 and rT3 kinetics we have shown that rifampicin also increases the MCR of T3 and rT3. Using the fall of serum T4 during TSH suppression as an indirect marker of the production rate (PR) of T4, we have demonstrated that there was no major change in monodeiodination nor any shift to either 5'- or 5-monodeiodination. Rifampicin stimulates in mice the mixed function hepatic oxygenases. However, we were unable to increase hepatic deiodinase activity (deiodinase type I) in this species. It is therefore possible that the increased MCR of T4 in man is not mediated by an increased conversion rate either. As mixed function hepatic oxygenases are known to increase hepatic conjugation it is suggested that rifampicin increases the biliary excretion of iodothyronine conjugates.

Adult↗
PubMed1985

Is conversion of thyroxine to triiodothyronine and reverse triiodothyronine autoregulated? Studies with short term suppression of thyroid function with 3'isopropyl 3,5-diiodothyronine.

We investigated the effect of a 6 days course of 20 micrograms of a thyromimetic thyronine analogue 3'isopropyl, 3,5-diiodothyronine (DIIP) on serum thyroid hormone and TSH levels in 10 normal male volunteers. TSH was inhibited progressively during the 6 days of DIIP treatment. By the third day after stopping the treatment this trend had already reversed. Of the serum thyroid hormones the T3 level had decreased by 32% and was the first to increase 5 days after stopping treatment. Serum T4 fell by 35% and returned later to normal. The next effect was an increase in the T3/T4 ratio which was most marked 5 days after treatment had stopped. Kinetic studies with 125I-T3 and 125I-reverse T3 were performed at this time. In comparison to pretreatment kinetics no change in MCR was obtained. It is therefore suggested that at least part of the more rapid increase of T3 than T4 after stopping the suppression therapy reflects an increased conversion.

Adult↗
PubMed1981

Epidemiology of obesity and hypertension.

Based on the reviewed literature and the data from the düsseldorf Obesity Study there is a close association between obesity and hypertension. This association is found in adults, adolescents and children. Hypertension is the most frequent cardiovascular risk factor in obesity. The black population shows higher blood pressure levels than the white population within the same relative weight. Prospectively investigated normotensive obese subjects are more likely to develop hypertension than normal weight subjects. In Western population there is also an association between hypertension and age. This is not seen in tribal populations, where after the age of 20 years body weight does not increase, suggesting body weight to be an important factor for the regulation of blood pressure. Present epidemiological evidence strongly calls for detailed prospective studies of obesity and hypertension, in order to define particularly hypertension-prone obesity subtypes.

Aging↗
PubMed1978

The influence of rRNA and tRNA on the translation of avian globin mRNA in cell-free systems of protein synthesis.

Cell-free synthesis of globin chains in the presence of globin mRNA in an Ehrlich ascites-cell-free system is further stimulated by addition of 18- and 28-S rRNA but not of 4-S tRNA and 5-S rRNA. This stimulation can not be observed in the wheat germ cell-free system. When 125I-labelled globin mRNA was incubated in the two systems we have found after 60 min a 75% decrease of trichloroacetic acid precipitable polynucleotides in the ascites but only a 20% decrease in the wheat germ system. The RNAase action on mRNA can be reduced by the addition of 18- and 28-S rRNA but not by 5-S rRNA and 4-S tRNA. We suggest that the stimulating effect of the two rRNA species in the ascites cell-free system is due to a higher activity of a specific RNAase in this system and a competitive protection of mRNA from RNAase action.

Animals↗
PubMed1976

[The catabolism of infused maltose in man].

The use of intravenously administered maltose was tested in 9 healthy human subjects and 3 insulin-dependent diabetic patients. The concentration of the blood sugar has not been influenced by the administered maltose. The concentration of maltose in the blood increases up to 170 mg/100 ml blood depending on the rate of the maltose infusion. The excretion of maltose in the urinis correlated with the applied dosis and with the blood maltose concentration. Under our experimental conditions 20 to 30% of the administered maltose have been excreted and 7.5 to 23.4% have been oxidized within 8 hours. The highest rate of degradation was about 40 mg maltose/min/human subject and is reached 2 hours later than the peak concentration of maltose in the blood. The metabolism of maltose is reduced in insulin-dependent diabetic patients. In these patients only 3% of the applied maltose have been oxidized and 51% excreted in the urin within 8 hours. Therefore, this disaccharide cannot be recommended as carbohydrate source of parenteral nutrition in insulin-dependent diabetic patients. The balance of intravenously administered maltose is not satisfactory in healthy adult humans, too. Infusion of maltose solutions have no real advantages over the infusions of oligosaccharide solutions.

Adult↗