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Biomedical subjects

W Busch

Publications and source records attributed to W Busch.

At least 37 records · Page 2Linked to original sources
PubMed1991

[A phagocytosis test for the evaluation of the local immunity status during endometritis therapy with special regard to the use of uterofertil in cattle].

After the influence of organic acids or peroxide acids with low concentration upon mucous membranes results a higher activity of the topical defence-situation. The application of a 0.2 per cent solution of peroxyethane acid (drug Uterofertil) into the uterus for endometritis-therapy directs an increase of phagocytosis-activity not only topical but also in the peripheric circulation of blood. The phagocytosis-activity was measured with a test by granulocytes. Other drugs were also tested, which will needed by endometritis-treatment of cattle.

Animals↗
PubMed1991

[The effect of total gnotobiological isolation and antimicrobial preparations on the survival of mice with acute radiation sickness].

In experiments on 406 CBA mice the effect of antimicrobial preparations, used in combination with total gnotobiotic isolation, on the survival rate of totally irradiated animals was studied. The use of antimicrobial preparations was shown to considerably enhance the survival rate of these animals. Cyprofloxacin, a new preparation of the kinolone row, exhibited a good effect ensuring selective decontamination of the intestine. The use of cyprofloxacin prior to irradiation with the subsequent isolation of the animals in gnotobiotic chambers increased the survival rate of these animals by 2.7 times. But the maximum survival rate of irradiated mice was observed in those cases when antimicrobial preparations were used both before and after irradiation in combination with the total gnotobiotic isolation of the animals.

Acute Disease↗
PubMed1988

Tetrameric structure of the nonactivated glucocorticoid receptor in cell extracts and intact cells.

Mouse lymphoma cells contain a nonactivated glucocorticoid receptor of Mr approximately 330,000 which is heteromeric in nature and is unable to bind to DNA. Following affinity labeling of the steroid-binding subunit and subsequent cross-linking with dimethyl suberimidate at various times either in cell extracts or in intact cells, a series of labeled bands was detected in SDS gels. From the molecular masses of completely and partially cross-linked complexes we conclude that the large nonactivated receptor is a tetramer composed of two 90 kDa subunits, one 50 kDa polypeptide and one steroid-binding subunit.

Animals↗
PubMed1988

Chemical cross-linking of heteromeric glucocorticoid receptors.

Glucocorticoid receptors of wild-type and nti ("increased nuclear transfer") mutant S49.1 mouse lymphoma cells exist in extracts under low-salt conditions predominantly as high molecular weight species (Mr greater than or equal to 300,000). These receptor-hormone complexes are unable to bind to DNA. High salt (300 mM KCl) produces dissociated receptors of Mr 116,000 and 60-A Stokes radius (wild type) and Mr 60,000 and 38-A Stokes radius (nti mutant), both of which bind to DNA. We used reaction with bifunctional N-hydroxysuccinimide esters as well as oxidation with Cu2+/o-phenanthroline to stabilize the high molecular weight structures. These cross-linked complexes do not interact with DNA, but reductive cleavage again produces the dissociable receptor forms and restores their ability to bind to DNA. The protein modifying reagents iodoacetamide and diethyl pyrocarbonate also produce stabilized high molecular weight receptor complexes. Cross-linking of the high molecular weight receptor forms can also be achieved in intact cells. Immunochemical techniques were used to prove that the complexes cross-linked either in vivo or in cell extracts do contain the heat shock protein of Mr 90,000 as a common constituent. The data show that the high molecular weight receptor complexes are preexisting in intact cells and that dissociation generates DNA binding ability.

Animals↗
PubMed1988

[Direct agglutination as a tool for toxoplasma control in pregnancy].

Sera of 3243 pregnant women were tested by direct agglutination and dye test for toxoplasma antibodies. An agreement of 99.48% between results of both tests could be found. The direct agglutination can be recommended as a screening technique in pregnancy care.

Agglutination Tests↗
PubMed1987

Evaluation of long-term oral levodopa therapy in chronic congestive heart failure.

To evaluate the long-term effects of orally administered levodopa, 11 patients with chronic congestive heart failure (NYHA III-IV) were studied during maintenance therapy (30 +/- 1 days) and after withdrawal from levodopa. The daily levodopa dose was 4 g in six patients; because of side effects the levodopa dose was reduced to 2-3 g in the remaining patients. After withdrawal of levodopa, mean pulmonary capillary wedge pressure and mean right atrial pressure increased significantly (from 19 +/- 2 to 24 +/- 3 and from 7 +/- 2 to 9 +/- 2 mmHg, respectively). Effective renal plasma flow was 329 +/- 57 during levodopa therapy and decreased significantly to 252 +/- 27 ml/min after withdrawal of levodopa. The number of ventricular premature contractions and couplets increased during levodopa therapy and decreased again significantly after withdrawal of levodopa. No significant differences between on and off levodopa were observed in resting heart rate, arterial blood pressure, cardiac index, stroke work index, systemic vascular resistance, sodium and water excretion, or creatinine clearance. Seven patients improved on levodopa therapy by one NYHA class; four of these seven patients deteriorated again by one NYHA class after withdrawal of levodopa. Regarding both clinical and hemodynamic changes after withdrawal of levodopa, three patients were classified as responders to long-term levodopa therapy. All three responders received 4 g levodopa per day. Average dopamine plasma level was 5.3 +/- 0.8 ng/ml in the responder group and 2.0 +/- 0.5 ng/ml in the nonresponder group. Long-term administration of oral levodopa is associated with beneficial clinical and hemodynamic response in only a minority of patients with chronic congestive heart failure.

Administration, Oral↗
PubMed1987

Subunit dissociation and activation of wild-type and mutant glucocorticoid receptors.

Apparent molecular weights of wild-type and nti ('increased nuclear transfer') mutant glucocorticoid receptors were obtained from Stokes radii and sedimentation coefficients. At low salt concentrations molecular forms of Mr 328,000 and 298,000 of the wild-type and mutant, respectively, were predominant. Increasing ionic strength resulted in receptor dissociation. Dissociated forms of Mr 130,000 and 63,000 of the wild-type and mutant, respectively, were obtained at 300 mM KCl and above. Some metal oxi-anions prevented dissociation. Receptor activation to allow DNA binding produced the dissociated forms which could be separated from non-activated receptors by filtration through DNA-cellulose or by DEAE-cellulose chromatography. Non-activated wild-type and nti receptors eluted from DEAE-cellulose under identical conditions while activated wild-type and nti receptors eluted differently. Partially proteolyzed wild-type receptors behaved identically to nti receptors. We conclude that the large forms of wild-type and nti receptors are heteromeric and contain only one hormone-building polypeptide per complex.

Animals↗
PubMed1987

[Knotting of stomach and endotracheal tubes].

After transnasal placement of a tracheal and a gastric tube, the latter did not function properly. Several attempts to remove the gastric tube were unsuccessful, but this could not be explained on several laryngoscopic inspections. The palpating finger finally found a knot of tracheal and stomach tubes high in the epipharynx. This incident underlines the importance of faultless functioning of tracheal and stomach tubes, especially in patients with intended intermaxillary fixation.

Adolescent↗
PubMed1986

Treatment of AIDS-related Kaposi's sarcoma with recombinant gamma-interferon.

Four patients with the acquired immunodeficiency syndrome and Kaposi's sarcoma were treated with subcutaneous human recombinant gamma-interferon at a dosage of 200 micrograms = 2 X 10(6) U twice daily for at least 28 days. While the dosage of interferon was well tolerated, progressive disease was observed in all four patients studied. These results might be due to the selection of the patients presenting advanced stages (3 out of 4) with recurrent disease after previous chemotherapy.

Acquired Immunodeficiency Syndrome↗
PubMed1981

[Postgraduate education in general medicine (author's transl)].

In 1968, postgraduate education for general practitioners was instituted. Ten years later, 50% of all general practitioners still practise without having completed a postgraduate course after setting up practice, on the other hand 25% have completed such a course. The period before completion of a postgraduate course fell below the 4-year mark in 1978 and 1979. The proportion of doctors with at most, two years further education at the time of setting up practice rose from 30% to 40% of all practising doctors in the last five years. Only 11% of the population sees a difference between the general practitioner and the "postgraduate" general practitioner. The "postgraduate" medical practitioner treats patients at a more favourable cost than a doctor without further training; the former looks after ca. 10% more cases than the doctor without training, independent of the size of the district.

Adult↗
PubMed1979

[Quantifiable morphokinesis of parts of the hypothalamo-adenohypophyseal-gonadal axis of hormonally desexed boars. 4. Studies on boars that have undergone combined treatment with the steroid test substance 547 and norgestrel].

Steroid test substance 547 and Norgestrel were used in a combination treatment of parts of the hypothalamo-adenohypophyseo-gonadal axis of boars. The quantifiable parameters of the morphokinetic effect thus produced (cell nucleus volumes of Nucleus praeopticus medialis hypothalami and its neurons as well as those of Leydig's cells testicle weight, length and diameter of tube, percentage of Leydig's cells, testicle weight, length and diameter of tube, percentage of Leydig's cells) did not differ significantly from the findings obtained from boars treated with Norgestrel only (cf. Dorst and co-workder, 1978). The same combination treatment, however, differed from exclusive Norgestrel treatment by causing the occurrence of socalled castration cells, which led to the assumption of an anti-androgenic effect of such combination treatment.

Androstenes↗