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Biomedical subjects

M Bagnasco

Publications and source records attributed to M Bagnasco.

159 records · Page 9Linked to original sources
PubMedDate not supplied

HPLC investigated physicochemical compatibility between Artrosilene injectable solution and other pharmaceutical products frequently used for combined therapy into elastomeric Baxter LV5 infusion devices.

Ketoprofen lysine salt(Artrosilene injectable solution) is a non-steroidal anti-inflammatory agent frequently administered by slow intravenous infusion with portable elastomeric infusion systems in association regimen with other analgesic drugs. The aim of this study was to investigate the physicochemical compatibility between ketoprofen lysine salt(Artrosilene injectable solution) and other injectable drugs frequently used in association, such as tramadol hydrochloride, keterolac tromethamine and morphine hydrochloride, into the Infusor LV5, Baxter elastomeric infusion system. Physicochemical properties of drug mixture, including colour, clarity, pH and drug content were observed or measured by a reversed-phase HPLC method with UV detection, before and after (up to 7 days) mixing at room temperature and under light protection. The results obtained demonstrated the physicochemical compatibility of ketoprofen lysine salt(Artrosilene injectable solution) with all drug formulations at every tested mixing ratios into Baxer Infusor LV5 infusion devices.

Analgesics, Opioid↗
PubMedDate not supplied

[Mixed-function oxidase induction as a test for the biological monitoring of water: limitations and prospects].

The induction in fish liver of some enzyme activities, and typically of microsomal mixed-function oxidases (MFO), provides the earliest biological warning signal of exposure to pollutants. Our studies provided evidence that the basal levels of cytochrome P-450 and specific MFO activities, such as arylhydrocarbon hydroxylase (AHH) and ethoxyresorufin deethylase (EROD), were strongly influenced by the diet in freshwater fish (Oncorhynchus mykiss). The response of fish liver to a known enzyme inducer, i.e., beta-naphthoflavone, was also affected by the diet, which therefore should be carefully controlled in laboratory studies. Under field conditions MFO activities were significantly enhanced in the liver of O. mykiss kept in polluted river water as well as in the liver of the seawater fish Diplodus annularis collected from a polluted harbour area, as compared to specimens of the same species collected from an unpolluted reference area.

Animal Feed↗
PubMedDate not supplied

Effects of aminothiols in 2-acetylaminofluorene-treated rats. I. Damage and repair of liver DNA, hyperplastic foci, and Zymbal gland tumors.

One hundred and seventy-nine male Wistar rats were divided into 6 groups and fed with a standard diet supplemented with 0.05% 2-acetylaminofluorene (2AAF) and/or 0.1% glutathione (GSH) or N-acetyl-L-cysteine (NAC). Each treatment cycle lasted for 3 weeks, followed by 1 week of standard meal. After 4 cycles, survival was 100% in the 3 control groups, and 86.0, 100 and 91.7%, in the groups receiving 2AAF, 2AAF plus GSH, and 2AAF plus NAC, respectively. After an additional 4-8 weeks, all the 5 surviving rats fed with 2AAF exhibited deforming ear tumors, which on histological examination were classified as sebaceous squamocellular carcinomas of Zymbal glands. No such tumors were detectable in control groups, nor in the 16 surviving rats fed with 2AAF plus GSH or NAC. In the liver, 2AAF produced significant DNA damage at the 3rd week of each cycle, which was partially repaired during the week of standard meal feeding. Moreover, 2AAF determined the appearance of gamma-glutamyl transpeptidase-positive foci, which tended to increase with time both in number and in size. GSH and NAC exerted similar protective effects on these phenomena, but only at early stages of the experimental model used.

2-Acetylaminofluorene↗
PubMedDate not supplied

Detoxifying activities in alveolar macrophages of rats treated with acetylcysteine, diethyl maleate and/or aroclor.

Single or sequential treatment of rats with the thiol N-acetyl-L-cysteine (NAC), the glutathione depletor diethyl maleate (DEM) and the enzyme inducer Aroclor 1254 (AR) produced several significant variations on metabolic activities of pulmonary alveolar macrophages (PAM). Specifically, all three compounds elicited an increase in some oxidoreductase activities, including the two dehydrogenases involved in the hexose monophosphate shunt (G6PD and 6PGD) and NADH- or NADPH-dependent diaphorases. Diaphorase activities were especially increased by sequential treatments with AR and DEM or with DEM and NAC. Both NAC and AR also stimulated other detoxifying mechanisms, such as those related to GSH S-transferase activity and to the NADPH-dependent reduction of hexavalent chromium. Therefore, all the monitored parameters were significantly enhanced not only by the enzyme inducer, but also by the thiol, demonstrating its protective role in the biotransformation of mutagenic/carcinogenic compounds.

Acetylcysteine↗
PubMedDate not supplied

Quantitative determination of fibronectin (FN): evaluation of immunoturbidimetric and rate nephelometric techniques for FN assay in the different biologic materials.

Aim of this study is to determine fibronectin concentration in the different biological materials to study its changes in the anatomic districts where the cell interactions in which FN participates do occur. The traditional immunoturbidimetric method and the nephelometric method are compared. An alternative method using a support for the collection of very small samples is proposed and the results obtained are discussed. This approach with solid phase immunonephelometry can be used both in amounts of biological fluids too small for traditional methods and in concentrations < 4.5 mg/dL. It is hoped that less complex techniques will be studied, allowing routine tests that can be performed by all laboratories. Unfortunately, at present this method is still investigated, however, it would be useful to adopt it in case of difficult sample collection.

Antigen-Antibody Complex↗
PubMedDate not supplied

Adrenal gland photoscanning by means of 131I-iodinated cholesterol.

Photoscanning by means of 131I-19-iodinated cholesterol was performed on 10 patients with various diseases of the adrenal glands. The authors confirmed that the method was suitable for study of the morphology and function of the adrenal glands in disease, especially when combined with stimulation by ACTH or suppression by dexamethasone. The radiation dose absorbed by the thyroid and by the gonads can be controlled during the examination by blocking the iodine trapping and suppression of the gonado-stimulating action, respectively.

Adrenal Gland Diseases↗