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Biomedical subjects

R Neumann

Publications and source records attributed to R Neumann.

At least 91 records · Page 5Linked to original sources
PubMed1985

Isolation of spirochetes from the skin of patients with erythema chronicum migrans in Austria.

Spirochetal organisms were isolated from biopsies (skin punches) of the erythematous anular skin lesion of three patients with erythema chronicum migrans. The organisms were cultivated in modified Kelly's medium and - after an incubation period of 2 weeks - discovered by dark field microscopy (X 200). Compared with the Lyme disease agent Borrelia burgdorferi the organisms did not differ in shape, motility and reaction with polyclonal antiserum. Differences to B. burgdorferi were found in (i) very slow growth of the isolated organisms in modified Kelly's medium and in (ii) non reactivity with monoclonal antibodies against the outer membrane protein of B. burgdorferi. It is concluded that the Austrian isolates are closely related to but not identical with the Lyme disease agent.

Adult↗
PubMed1985

Sebum suppression by benzoylperoxide.

Sebum excretion rate (SER) was determined by thin-layer chromatography and based on densitometric data in 9 male and 5 female patients suffering from acne during treatment with 10% benzoylperoxide (BPO). BPO was applied to the forehead (treatment area), whereas gel only was applied to the chest (control area) for 6 weeks. SER decreased in 10/14 subjects, no change was found in 1 subject and 3 patients exhibited an increase in SER. Suppression varied between 12 and 86%. Concomitant SER reduction in control and treatment areas was noted in 6 patients. When treatment and control areas of individual patients were considered for data evaluation, SER decrease was noted in only 4 out of 14 subjects. Similar results were obtained when free fatty acids, triglycerides and squalene data were analyzed. Combined, these data suggest that BPO may affect SER in some patients. The present experiments indicate the importance of adequate controls in such studies.

Acne Vulgaris↗
PubMed1985

[The importance of adrenergic receptors for dermatology].

Receptor research is a rather new but most promising field of research. This review summarizes the data available on the adrenergic receptors. in addition, information is provided about the important function of these membrane receptors as control or modulator of dermatophysiology and dermatopathy.

Adipose Tissue↗
PubMed1980

DNA methylation and viral gene expression in adenovirus-transformed and -infected cells.

The level of DNA methylation in adenovirus type 2 (Ad2) and type 12 (Ad12) DNA was determined by comparing the cleavage patterns generated by the isoschizomeric restriction enzymes HpaII and MspI. As previously reported virion DNA of Ad2 and Ad12 is not methylated. Parental or newly synthesized Ad2 DNA in productively infected human KB or HEK cells is not methylated either, nor is the integrated form of Ad2 DNA in productively infected cells. Hamster cells and Muntiacus muntjak cells are abortively infected by Ad12. We have not detected methylation of Ad12 DNA in hamster or Muntiacus muntjak cells. An inverse correlation between the level of methylation and the extent of expression of viral DNA in Ad12-transformed hamster cells has been described earlier. A similar relation has been found for the EcoRI fragment B of Ad2 DNA which is not methylated but is expressed as the Ad2 DNA-binding (72K) protein in the Ad2-transformed hamster line HE1. Conversely, the same segment is completely methylated in lines HE2 and HE3, and there is apparently no evidence for the expression of the 72K protein in these cell lines.

Adenoviruses, Human↗
PubMed1979

Diethylmesoxalate hydrate, a new irreversible inhibitor of cholinesterases.

Bovine erythrocyte acetylcholinesterase and human plasma cholinesterase are irreversibly inhibited by diethylmesoxalate hydrate, the inhibition potency being comparable to that of certian insecticidal organophosphates and carbamates. Insect cholinesterases, however, appear to be much less affected by diethylmesoxalate hydrate. The compound was also found to inhibit the hydrolysis of paraoxon by rabbit plasma A-esterase, but in a reversible mode.

Animals↗
PubMed1979

Creatine kinase isoenzyme BB in serum of healthy adults and children.

The activity of the creatine kinase isoenzyme BB was determined in the serum of 26 healthy adults and 31 children. The isoenzyme BB could be proved as a normal component in the human serum. In the adults examined, an activity of 0.56 +/- 0.16 I.U./l (x +/- S.D.) was determined. The activity of creatine kinase isoenzyme BB in the serum does not depend on sex but is subject, however, to a strong age dependence. Only at an age of more than 18 years, isoenzyme BB activities adjust to those of adults.

Adult↗
PubMed1978

Lecithin: cholesterol acyltransferase activity in patients with chronic liver diseases and positive LP-X tests.

Lecithin: cholesterol acyltransferase activity has been measured in serum from patients with various liver disorders and positive LP-X tests and from healthy subjects. Statistical analysis indicated that lecithin: cholesterol acyltransferase activity provided no help in the discrimination between the persons of both groups although the mean activities differed significantly.

Chronic Disease↗
PubMed1977

MAO inhibition, an unlikely mode of action for chlordimeform.

Inhibition constants of several formamidines, their corresponding formanilides and other representatives of compounds derived from aniline, such as phenylureas, N-phenyl-carbamates and acylanilides, were determined for rat liver monoamine oxidase. The reversability of the inhibition and the lack of correlation between inhibition potencies and toxicities of the compounds tested add to the opinion that MAO inhibition is not a prominent factor in chlordimeform poisoning.

Amidines↗