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Biomedical subjects

W H Wagner

Publications and source records attributed to W H Wagner.

At least 55 records · Page 3Linked to original sources
PubMed1985

Percutaneous angiographic embolization for hepatic arterial hemorrhage.

Eight cases of hepatic arterial bleeding are reported. Bleeding in five instances was consequent to trauma and was either persistent postoperative (three cases) or delayed with hemobilia (two cases). Bleeding in the other three cases was from rupture of a subcapsular hematoma of the liver, with spontaneous hepatic rupture of pregnancy (two cases) and metastatic melanoma (one case). Angiography demonstrated pseudoaneurysm in six cases, a hepatic artery to portal venous fistula in one case, and a subcapsular hematoma in the final case. Percutaneous angiographic embolization controlled bleeding in seven cases and was not feasible in one case with tortuosity of the celiac axis. Complications included hepatobiliary necrosis in one patient and subphrenic abscess in two patients. Percutaneous angiographic embolization can selectively occlude a branch of the hepatic artery and is effective in the control of hepatic arterial bleeding from a variety of causes.

Adult↗
PubMed1984

Lipid-based parenteral nutrition and the immunosuppression of protein malnutrition.

Protein malnutrition has been directly related to impaired immunocompetence. An experimental protocol was designed to determine the efficacy of a lipid-based system of total parenteral nutrition (TPN) in restoring immunocompetence in nutritionally depleted subjects. Thirty rats sensitized to PPD were made anergic by the oral administration of a protein-free diet. Nutritional repletion was instituted with either a complete oral diet or lipid-based TPN. The two groups of animals did not differ significantly in the time required to regain positive skin test reactivity or in the weight gained during the repletion period. The lipid-based system of TPN was comparable to the complete oral diet in reversing the anergy of protein malnutrition.

Animals↗
PubMed1983

Similar liver function abnormalities occur in patients receiving glucose-based and lipid-based parenteral nutrition.

Biochemical and histopathological evidence of hepatic dysfunction has been associated with the use of glucose-based total parenteral nutrition (TPN). In the present study liver indices, SGOT, SGPT, alkaline phosphatase, and bilirubin, were analyzed retrospectively during the course of total parenteral nutrition in 40 patients; 15 patients received a glucose-based system and 25 received a lipid-based system. Transient elevations in at least one of the measured parameters were found in a majority of patients receiving either system. These data confirm previous reports of liver function test abnormalities in patients receiving glucose-based total parentual nutrition. However, in contrast to results from prior studies, these derangements also were observed during the administration of a nutritional support system using lipids as the primary source of calories.

Adolescent↗
PubMed1981

[Microbiological laboratory studies with ciclopiroxolamine (author's transl)].

A survey is given on the microbiological laboratory results obtained up to date with 6-cyclohexyl-1-hydroxy-4-methyl-2(1H)-pyridone, 2-aminoethanol salt (ciclopiroxolamine, Cic, Hoe 296, Batrafen). The activity spectrum of the drug on fungi, bacteria and other organisms is described. Various properties by which Cic differs from commercial antimycotics are mentioned. They concern the great uniformity of MICs in pathogenic fungi, their consistency under various test conditions, the importance of the nutrient medium for the level of in vitro activity, and the steepness of dose-response curves. In addition, previously described properties of Cic are summarized, including findings on its mode of action in fungi, its effect in model mycoses, and its high efficacy in hornified skin types. The relevance of laboratory findings for therapy is discussed.

Antifungal Agents↗
PubMed1980

[Helminthic infections of the tropics: parasitology and therapy (author's transl)].

The significance of tropical heminthiases for the populations of tropical countries is discussed and a survey on the incidence of these parasitic infections is given. The difference between infection and disease is explained, and the properties of an ideal drug for combatting the different diseases are described. After a short comment on the goals of the primary and secondary screening procedures the authors refer to WHO's Special Programme for Research and Training in Tropical Diseases. As to the different forms of filariasis, the most important problem is onchocerciasis due to the high rate of blindness. The existing drugs (suramin DEC) are evaluated, however, there is a need for a safe, macrofilaricidal drug. The chemotherapy of filariasis caused by W. bancrofti and B. malayi and the drugs used is also discussed. Thereafter, a survey on the chemotherapy of schistosomiasis and the drugs at hand and in development is given with special reference to praziquantel. Chemotherapy of opistorchiasis and clonorchiasis is still unsatisfactory. The problems arising from this situation are mentioned. Up to now, we have a similar situation in hydatid disease, caused by Echinococcus species. The therapy of choice is operation, however, in animal experiments it could be demonstrated that benzimidazole derivatives inhibit the growth of cysts what indicates the possibility of chemotherapy in man also. Finally, a survey is given on anthelminthic drugs for the therapy of different forms of intestinal helminthiasis with special regard to ancylostomiasis.

Ancylostomiasis↗
PubMed1978

[The present situation of antibacterial resistance (author's transl)].

The various types of bacterial resistance (natural species resistance, chromosomal and plasmidic resistance) and their mechanisms are described. Thereafter, a survey on the resistance is given using investigations from different sources. The distribution of resistant strains dependent on the geographical location and the situation of the patients (ambulatory--hospitalized) is described, and the development of resistant strains in dependance of time is analyzed. Finally, the phenomena of resistance against aminoglycoside and beta-lactam antibiotics are explained in more detail.

Aminoglycosides↗
PubMed1977

[Chemotherapeutically effective nitro compounds. 3rd communication: nitropyridines, nitroimidazopyridines and related compounds (author's transl)].

New 2-nitropyridines and 3-nitropyridines, and 3-nitroimidazo-[1,2-a]-pyridines and related compounds (together 106) were synthesized and tested for their chemotherapeutic efficacy against trichomonads, amoebas and other organisms, such as Eimeria tenella, bacteria, fungi, helminths. Several 2-nitropyridines revelaed a detectable systemic effect against Entamoeba histolytica (extraintestinal amoebiasis of the golden hamster) and also a weak activity against Trichomonas fetus in the NMRI-mouse. Only a few 3-nitropyridines showed a marked systemic effect against trichomonads. Of the 3-nitroimidazo-[1,2-a]-pyridines, only the electroneutral carboxylic acid amide group exhibited a pronounced activity, exclusively against trichomonads; however, the activity was nullified again by electronegative, electropositive and other electroneutral substituents. As they were not superior in chemotherapeutic respect compared to the known standard preparation (metronidazole), no further tests were carried out with the most effective compounds.

Amebicides↗
PubMed1977

[Special problems in the chemotherapy of bacterial infections in otolaryngology (author's transl)].

The different occurrences of pathogens in acute and chronic otitis media, sinusitis, tonsillitis and infections of the respiratory tract are described, with consideration given to the development of gram-negative flora. Therapeutic plans are presented with regard to each of the possible organism patterns. Specific emphasis is given to the aminoglycoside antibiotics which can affect the auditory and vestibular systems.

Aminoglycosides↗
PubMed1976

[Chemotherapeutically active nitro compounds. 2nd communication: Nitrodiphenyl sulfones (author's transl)].

A number of new 4-nitro-4'-amino-diphenyl sulfones and related compounds were prepared and investigated as to their therapeutic activity. They showed a good systemic activity against tubercle bacilli (M. bovis, NMRI mouse) and plasmodia (P. berghei, NMRI mouse). The test results reveal that the 4-nitro-4'-amino-diphenyl sulfones possess a spectrum of activity similar to that of diamino-diphenyl sulfone (DDS). It is assumed that 4-nitro-4'-amino-diphenyl sulfones in vivo are converted into DDS derivatives by reduction. The advantages of the new compounds, however, were too insignificant as compared to DDS to justify further extensive trials.

Animals↗
PubMed1975

Host-parasite interactions with peritoneal macrophages of mice and rats in vitro and in vivo.

This paper deals with the intracellular multiplication of mycobacteria in peritoneal macrophages from mice and rats immunized with tubercle bacilli or pretreated with Triton WR 1339. If unstimulated macrophages were used, almost unrestricted multiplication of mycobacteria was observed in macrophages from both vaccinated and pretreated hosts after infection of the cells in vitro. Only when the infection of the cells was perfored in the peritoneal cavity of vaccinated hosts did the macrophages display a high degree of inhibition. This striking difference in the behavior of macrophages infected in vitro and in vivo is explained by the local inflammation caused by the intraperitoneal infection, which leads to an influx of T-cell mediators. When macrophages from hosts pretreated with Triton WR 1339 were used, inhibition of the multiplication of mycobacteria within cells infected in vitro or in vivo was very slight, though this compound displayed a marked protective effect in the host. Addition of streptomycin to the culture medium caused a strong inhibition of intracellular mycobacteria even in small concentrations; there was no difference between normal and "immune" macrophages. When rats were infected with virulent tubercle bacilli, they were initially fully susceptible to the infection but showed rapid onset of a strong immune response.

Animals↗
PubMed1975

[Chemotherapeutic effects of nitro compounds. 1. Nitroanilines].

More than 200 nitro compounds, most of them nitroaniline derivatives substituted with one or more radicals having a basic reaction, were prepared and investigated as to their therapeutic activity against bacteria, fungi, protozoa, helminths, viruses and tumors. Several mono-nitrobenzenes with a radical having a basic reaction showed weak in-vitro activity against gram-positive bacteria and against Crocker's sarcoma 180; they also showed systemic activity against nematodes (Aspiculuris tetraptera) and viruses. The majority of therapeutically active compounds with pronounced in-vivo activity against Trichomonas fetus, Entamoeba histolytica, Schistosoma mansoni, cestodes, nematodes (Ancylostoma caninum), viruses (influenza, MHV, SAV and EMC) and various types of carcinoma (Ehrlich's carcinoma, leukemia 1210, Crocker's sarcoma 180) were dinitrobenzene derivatives with one radical having a basic reaction and electropositive groups or unreactive or reactive chlorine atom, and di-nitrobenzene with two equal or two different radicals having a basic reaction. Compound No. 70 revealed a marked in-vitro activity against fungi (Trichophyton; Microsporum, Candida albicans). Other nitro compounds such as bis-mono- and bis-dinitrobenzene derivatives likewise showed a systemic action against E. histolytica, viruses and, in particular, carcinoma (Crocker's sarcoma 180, Ridgway's osteosarcoma). Oxygen and sulfur analogue compounds as well as compounds produced by reduction also possessed a distinct activity against E. histolytica and viruses. On the basis of the present results particularly the dinitrobenzenes substituted with two radicals having a basic reaction include a number which have in common that a structure/activity relationship is recognizable in respect of E. histolytica, Schistosoma mansoni and different types of viruses. The activity against viruses in this class of compounds is probably due to an increased interferon production in the host animal. Whether the mechanism of action is the same against E. histolytica or Schistosoma mansoni has not been determined so far. A tumorigenic effect was observed mainly in those di-nitrobenzenes which are classed as alkylating compounds. Because of the small chemotherapeutic index the trials were not continued with the most effective compounds mentioned.

Aniline Compounds↗