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Biomedical subjects

H Heinecke

Publications and source records attributed to H Heinecke.

At least 19 recordsLinked to original sources
PubMed1991

[Use of "complementary methods" for experimental animal studies of digestion in the 18th and 19th centuries].

The use of complementary methods to animal experiments is very old. Spallanzani (1785) apparently was the first who used such methods in his studies on digestion. In the 19th century Eberle, Pappenheim, Purkyné and others used on their studies on the process of digestion artificial chyme. On this view, Beaumont published in 1834 an interesting paper on the digestion of men after observations in vivo and parallel in vitro. All papers show, that the using of complementary methods to animal experiments was not unusual in the 19th century.

Animals↗
PubMed1983

Prenatal toxic effects of STS 557. II. Investigation in rabbits--preliminary results.

The synthetic steroid STS 557 (17 alpha-cyanomethyl-17 beta-hydroxy-estra-4, 9-dien-3-one) was tested in gravid rabbits from days 5 to 25 p.c. It was the aim of the experiments to investigate any embryotoxic and/or teratogenic effect of STS 557. The compound did not show any effects on the mothers nor on the fetuses. Levonorgestrel was tested as standard.

Abnormalities, Drug-Induced↗
PubMed1982

Effect of quercetin on the course of mengo virus infection in immunodeficient and normal mice. A histologic study.

Quercetin protects mice from lethal Mengo M virus infection when given orally 12 and 1 hr before and 8, 24, 36, 48 and 56 hr after inoculation. No differences in the course of infection have been found between normal splenectomized or congenitally athymic mice. Likewise the effect of drug treatment was similar in all three models. Necrotic lesions in the main target organs (central nervous system, salivary and lacrimal glands, thymus, pancreas, kidneys and spleen) from both normal and immunodeficient animals were less severe and developed later in quercetin-treated mice than in placebo-treated ones. In a few quercetin-treated virus-infected survivors a slight and persistent encephalitis was seen. Quercetin enhanced the graft-versus-host reaction, but failed to affect the humoral antibody response of mice to sheep red blood cells. It is concluded that T- and B-lymphocytes seem involved neither in the pathogenesis of acute Mengo virus infection nor in the antiviral effect of quercetin.

Animals↗
PubMed1980

Experiences with a three step test scheme for embryotoxicity and teratogenicity.

Experiences with the three step teratological screening test for selection of teratogenic side effects are described. Step I: The prenatal examination of the foetuses may give indications of embryotoxicity, growth retardation and teratogenicity. Step II: The peri- and postnatal examination includes the duration of pregnancy, the delivery, the viability, the postnatal development and behaviour of the untreated offspring. In special cases the transplacental tumour induction may be studied. Step III: The fertility of the untreated offspring is examined and, in some cases, the generation test should be added.

Abnormalities, Drug-Induced↗
PubMed1980

The immunosuppressive effect of beta-[1-phenyl-5-bis(beta-chloroethyl)-aminobenzimidazolyl-(2)]-DL-alanine (ZIMET 3164) on cell-mediated immunity in mice.

The potential immunosuppressive drug beta-[1-Phenyl-5-bis(beta-chloroethyl-5-amino-benzimidazolyl-(2)]-DL-alanine (ZIMET 3164) was tested for its effect on cell-mediated immunity. The models "skin grafting" and "contact hypersensitivity" were used. --The results showed a marked prolongation of the mean survival time of the skin grafts and also a high depression of the contact hypersensitivity (delayed hypersensitivity) to picryl chloride. The immunosuppressive efficacy of ZIMET 3164 was higher than that of the reference compound cyclophosphamide.

Animals↗
PubMed1977

[Proof of sex-dependent effect of lambdamycin in mice].

The juvenile mouse is used as screening model to test feed additives for their potentially ergotropic effects. Weight development in 20-day old mice was found to be much more strongly influenced than in animals being 25 to 30 days old. The antibiotic lambdamycin inhibited weight gain in female mice, whilst males were promoted in weight development following lambdamycin application.

Analysis of Variance↗
PubMed1976

[Lambdamycin, an antibiotic from Streptomyces glaucoachromogenes Prauser strain MET 31118].

Lambdamycin-producing strains were detected by means of the BIP test method. The isolation technique and the physicochemical and biological properties of lambdamycin, an antibiotic produced by Streptomyces glaucoachromogenes, are described. Lambdamycin is a yellow-green pigment of the chromoglycoside type. Digitalose and fucose are the sugar components. The physicochemical properties of lambdamycin resemble those of chartreusin. However, the known biological activity is different. The antibiotic can be isolated from culture filtrates and from the mycelium by extraction with lower aliphatic alcohols. It can be purified by gel filtration methods. Lambdamycin displays antimicrobial activity, particularly against grampositive bacteria. Strains which produce enzymes inactivating different commercial antibiotics are also inhibited. Moreover, lambdamycin shows antiviral activity, as well as cancerostatic and ergotropic action in vitro and in vivo. The acute LD50 of lambdamycin in mice after 21 days was greater than 125 mg/kg when administered intraperitoneally.

Animals↗