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Biomedical subjects

H Fischer

Publications and source records attributed to H Fischer.

At least 379 records · Page 21Linked to original sources
PubMed1984

[Recurring thrombosis of the subclavian vein during estrogen therapy of prostatic cancer].

A cardiac pacemaker had been implanted in a patient with carcinoma of the prostate because of a sick sinus node. Thrombosis of the left subclavian vein occurred four weeks later. After complete recanalisation following thrombolytic treatment a recurrence of the thrombosis occurred during high-dosage intravenous oestrogen treatment. Continuous increase of prothrombin time was observed during oestrogen administration while the oral anticoagulation had remained unaltered. This indicated increase of synthesis of vitamin-K-dependent clotting factors by the oestrogens. This case demonstrates that in patients with implanted material and oral long-term anticoagulation the indication for oestrogen treatment must be extremely accurately. In every case very close surveillance of coagulation is necessary.

Blood Coagulation Tests↗
PubMed1984

Adrenocortical suppression by a single induction dose of etomidate.

In a prospective controlled trial we studied the effect of a single induction dose of etomidate or thiopentone on the adrenocortical function in 29 patients undergoing elective surgery. During anesthesia and in the recovery period serum cortisol rose significantly in the thiopentone group only. In contrast, after induction with etomidate serum cortisol decreased and remained below the starting values throughout the study period (5 h). The differences between the two groups were significant at 120, 150, 180, 210, and 240 min after induction (p less than 0.05). Moreover, plasma ACTH increased significantly more after etomidate than after thiopentone (p less than 0.02) indicating relative unresponsiveness of the adrenal cortex to stimulation by endogenous ACTH. We conclude that a single i.v. bolus of etomidate (0.26 mg/kg) leads to significant adrenal insufficiency in patients without preexisting endocrine abnormalities.

Adolescent↗
PubMed1984

Enhanced casein kinase II activity in human tumour cell cultures.

Casein kinase II (CKII) activity is enhanced as much as 2-3 fold in established and 4-5-fold in transformed human cell lines when compared to that of fibroblasts and primary human tumour cell cultures where CKII activity never exceeded a basic level. The high activity of CKII in transformed cells and in established cell lines was reduced to about the same basic level after treatment with heparin, a highly specific inhibitor of CKII activity. The activity of the cAMP-dependent protein kinase was virtually the same in fibroblasts and various human tumour cell lines investigated.

Casein Kinases↗
PubMed1984

Differential generation of chemiluminescence--detectable oxygen radicals by normal polymorphonuclear leukocytes challenged with sera from systemic lupus erythematosus and rheumatoid arthritis patients.

The generation of chemiluminescence (CL)-detectable oxygen radicals by normal human polymorphonuclear leukocytes (PMN) after challenging with systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA) sera is described. CL was measured in a luminol-dependent assay and referred to a standard obtained when performed immune complexes (Ic) (human tetanus toxoid-antitoxoid Ic resuspended in normal pooled serum) were tested on PMN. Normal sera gave rise to CL activity by PMN between 0% and 50% of the standard Ic (mean +/- standard error of the mean (SEM): 20.7 +/- 4.8). Sera from SLE and RA patients induced strikingly different biological effects on PMN. SLE sera generally induced a high CL-detectable generation of oxygen metabolites which may be causally related to the intense tissue damage (vasculitis) frequently observed in this disease. In contrast to SLE, RA sera induced a CL-detectable respiratory burst by PMN that was included in the normal range. Thus, the biological effects of these sera in terms of stimulation of toxic oxygen radical generation by phagocytes are quite different. This generation of oxygen radicals might reflect a different clearance of circulating Ic by PMN in SLE and RA disease.

Antigen-Antibody Complex↗
PubMed1984

[Therapeutic results in hyperthyroid patients from the Bern endemic goiter region].

Among 239 hyperthyroid patients from the Bernese endemic goiter area referred to specialist, 66% were found to have Graves' disease (MB), 12% hyperthyroid autonomous adenoma ( AAH ) and 22% multinodular toxic goiter (HK). 189 (79%) of these 239 patients have been followed up 5.4 +/- 3.8 years after the last treatment. At the time of follow-up, 146 patients (77%) were euthyroid without additional treatment. 97 of these (51%) became euthyroid after a single, initial treatment (41% of the MB, 83% of the AAH and 67% of the HK). 68 patients (36%) developed recurrences, in some cases several (48% of the MB, 4% of the AAH and 15% of the HK). These recurrences occurred in 56% of cases treated with carbimazole, in 19% of the thyroidectomies and in 11% of the radioiodine treated cases. 30% of the recurrences occurred two or more years after the last treatment. At the time of follow-up, 40 patients (21%) were found to be hypothyroid (23% of the MB, 13% of the AAH and 21% of the HK). However, only 20 of these patients had been treated properly with 1-thyroxin; the other 20 were either insufficiently treated or not at all. Hypothyroidism has been observed in 27 (25%) patients after thyroidectomy and in 13% (23%) patients after radioiodine. No complications were recorded after radioiodine or under carbimazole treatment. After surgery, 2.8% of the patients had recurrent nerve palsy and 2.8% permanent hypoparathyroidism. The present data are in accordance with those published from outside the goiter areas.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMed1984

[Enzymatic debridement in venous ulcus cruris. Report of a multicenter clinical comparative study with various enzyme preparations].

In a multicenter trial (comprising 258 patients in eight centers) three topical preparations for enzymatic debridement, which are widely used in our country, have been compared in the treatment of leg ulcers. Preparation A is a combination of bovine fibrinolysin and desoxyribonuclease (but without antibiotic); preparation B is a combination of clostridiopeptidase and chloramphenicol and preparation C of trypsin and framycetin sulphate. The results showed no significant difference in the effects of treatment between the preparation. Preparation A however was much better tolerated; preparation B and C induced a lot of side effects. This means that antibiotics in preparations for enzymatic debridement are not of real advantage.

Chloramphenicol↗
PubMed1984

[Origin and significance of a thermostable granulocyte antigen].

In 1972 the thermostabile antigen of granulocytes was for the first time isolated by Thoss and Abendroth from punctates of the joint of patients with rheumatoid arthritis. Its origin from mature neutrophil granulocytes was ascertained by fluorescence-microscopic investigations. In the present paper the existence of thermostabile antigen of granulocytes in neutrophil granulocytes could be confirmed. The fluorescence pattern of neutrophil granulocytes of healthy persons did not show any differences in comparison to patients with inflammatory or myeloproliferative diseases as well as granulocytes from punctates of the joint or sternal marrow. With the help of punctates of the lymph-nodes the presence of thermostabile antigens of granulocytes in cells of the lymphatic system could be excluded. In smears of the sternal marrow positive fluorescence could be proved in the myelopoesis in neutrophil metamyelocytes. Quantitative investigations in inflammatory and myeloproliferative diseases as well as in granulocytopenias showed that the TSGA -serum values of the numbers of granulocytes go parallel. In punctates of the joint of patients with rheumatoid arthritis we found concentrations of thermostabile antigens of granulocytes which up to 50-fold were above the normal values of the serum. There was a close correlation to the number of granulocytes in the synovial fluid and to the cytological local activity. The TSGA -level can be regarded as indicator of granulocytic activation.

Antigens↗
PubMed1984

[Epidemiology of Trichinella spiralis infections in the Eifel region, 1982].

In November 1982 146 persons became ill within a few days with trichinosis in Bitburg (GFR). Prompt epidemiological and immunodiagnostic investigations demonstrated the high likelihood of infection by ingestion of raw sausage produced at a butcher's near Bitburg. The diagnosis of trichinosis could be ascertained still in the acute phase of disease by demonstration of the Trichinella larvae in peripheral blood. Retrospective analysis of earlier disease from the same area showed that the same infection source had led to a smaller epidemic already in August/September of 1982. This investigation confirms that epidemic trichinosis may occur in the GFR despite law-enforced assessment of meat for Trichinella. However, by combination of epidemiological and immunodiagnostic methods the mode and source of infection can be established promptly and reliably.

Disease Outbreaks↗
PubMed1984

[Drug side effects in antineoplastic and immunosuppressive cytostatic therapy].

The clinical use of cytostatics belongs to the most difficult forms of pharmacotherapy. On account of the slight therapeutic breadth of these substances, their use is nearly regularly loaded with partly severe toxic side effects. In a survey of literature and with the help of own instances the possible toxic side effects, their diagnostics. prevention and therapy, concerning the various organ systems, are described. Due to their high potential toxicity cytostatics should be administered only by physicians experienced in this therapy under exactest indication.

Antineoplastic Agents↗
PubMed1984

Investigation of the antitumor activity of new epoxide derivatives. Part I: s-Triazinetrione derivatives.

The noteworthy cytostatic activity of triglycidyl-s-triazinetrione and the planned clinical testing of this new active substance induced us to subject this class of substances to closer examination. By chemical reaction of one of the three glycidyl groups present it was possible to introduce wide variations in the properties of the compounds, whilst still retaining the active principle. A number of these substances possessed very high antitumor activity as revealed in the leukemia screening test (P 388; mouse). The influence of other substituents within the glycidyl groups affecting the reactivity of the epoxides groups was also examined.

Animals↗
PubMed1984

Chemiluminescence and lymphocyte proliferation: parallelism in collaboration between subpopulations of thymus cells for both types of responses.

Rat thymocytes respond to exposure to phytomitogens by oxidant generation as detected by chemiluminescence in presence of luminol. Maximal chemiluminescent response to a wide variety of plant lectins was obtained only after the cells had been incubated for 18 hours at 37 degrees C but not at 4 degrees C. This temperature dependence and the necessity for intact protein-and RNA-synthetic machinery during the incubation period indicate the occurrence of differentiation of thymocytes as they develop the capacity for chemiluminescent response. Furthermore, adherent-phagocytic cells play an essential collaborative role during this differentiation. A remarkable parallelism was shown to exist in the capacity of a cell subset to respond to concanavalin A by DNA synthesis and the ability of the same subset to respond by chemiluminescence. The latest-sedimenting small lymphocytes after velocity sedimentation of thymus cells develop the capacity for DNA-synthetic as well as chemiluminescent responses to concanavalin A only if allowed to collaborate with a population of early-sedimenting adherent-phagocytic cells.

Animals↗
PubMed1984

Role of macrophages in malaria: O2 metabolite production and phagocytosis by splenic macrophages during lethal Plasmodium berghei and self-limiting Plasmodium yoelii infection in mice.

The role of splenic macrophages in resistance to lethal Plasmodium berghei or self-limiting Plasmodium yoelii was studied by testing their rate of phagocytosis and their production of O2 metabolites (H2O2 and O2-) upon nonspecific stimulation with zymosan. It was found that, compared with P. berghei, infection of mice with P. yoelii resulted in an earlier appearance and in higher numbers of adherent cells in the spleen. Furthermore, the capacity of macrophages to generate O2 metabolites was significantly higher in P. yoelii- than in P. berghei-infected mice. This difference in the production of O2 metabolites was more pronounced when calculated on a per spleen basis. On the other hand, phagocytosis by macrophages was similar in both types of infection. The data suggest that lethal and nonlethal malaria species differ in their capacity to induce the production of O2 metabolites by macrophages, thereby influencing the final course of disease.

Animals↗
PubMed1984

Production and release of peptidoglycan and wall teichoic acid polymers in pneumococci treated with beta-lactam antibiotics.

Autolysin-defective pneumococci treated with inhibitory concentrations of penicillin and other beta-lactam antibiotics continued to produce non-cross-linked peptidoglycan and cell wall teichoic acid polymers, the majority of which were released into the surrounding medium. The released cell wall polymers were those synthesized by the pneumococci after the addition of the antibiotics. The peptidoglycan and wall teichoic acid chains released were not linked to one another; they could be separated by affinity chromatography on an agarose-linked phosphorylcholine-specific myeloma protein column. Omission of choline, a nutritional requirement and component of the pneumococcal teichoic acid, from the medium inhibited both teichoic acid and peptidoglycan synthesis and release. These observations are discussed in terms of plausible mechanisms for the coordination between the biosynthesis of peptidoglycan and cell wall teichoic acids.

Kinetics↗
PubMed1984

[Malignant metastasizing cystosarcoma phylloides of the breast. Ulm collection of rare tumors: VI].

Malignant cystosarcoma phylloides represents the malignant form of mammary fibroadenoma. In spite of atypical epithelial components, the biological behaviour of the tumour depends on malignant transformation of the dominant mesenchymal stromal tissue in the tumour. The histological appearance, often extremely variable, usually corresponds to a fibrosarcoma. Lipoblastic, chondroid and myxoid structures or areas of ossification may be present, although a completely dedifferentiated cystosarcoma is rare. The epithelial structures which are typically canalicular may reveal hyperplastic and dysplastic changes as well as an apocrine change and occasionally squamous metaplasia. Besides aggressive local infiltration, hematogenous metastasis of the skeletal system and lungs is common. Therapy is dependent on the extent of local tumour growth as well as on the degree of metastasis and usually takes the form of radical mastectomy with lymphadenectomy and postoperative radiotherapy. Local recurrence is found in over 50% of the cases and the 5-year survival rate is in the order of 70%.

Breast Neoplasms↗