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Biomedical subjects

P Ammannati

Publications and source records attributed to P Ammannati.

7 recordsLinked to original sources
PubMed2000

Alcohol carousel and children's school drawings as part of a community educational strategy.

Within a community action research program, messages for the community population can be conveyed through already existing channels (newspapers, magazines, TV, radio) or special tools can be created. As part of the Rifredi Health District (16,900 inhabitants), Florence, Italy, Community Alcohol Action Research Project, 5,500 alcohol carousels (translated and adapted from the Stockholm carousel) were distributed during 1996 in the project's area where they were freely available. Two samples, one of a consumers' association (response rate 26%) and the other of school parents, employed a questionnaire. A few local key people underwent a qualitative interview. In all circumstances the carousel proved to be understandable, useful, and able to elicit discussions about alcohol issues. In 1996-97, after a 2-year training program in communication skills and alcohol prevention, 13 teachers in local preschools, elementary schools, and middle schools planned and implemented a health education program on the issues of alcohol and food. One outcome was nine drawings produced by the school children. The drawings were exhibited in some schools and supermarkets, and were hung in city buses.

Adult↗
PubMed1999

A Study on Vascular Retinal Alterations in Patients with Coronary Artery Disease.

The paper describes the study carried out on a sample of 27 coronary artery disease patients, aiming to determine a correlation between coronary artery disease and anomalies in the retinal circulation. Patients underwent selective coronary arteriography and fundus fluorescein angiography that allowed us to investigate the dye dynamics and to detect abnormalities of time evolution, vessel walls, and flux. During the fluorescein angiography we measured time events as the choroidal flush (ta) the start of the laminar phase (tb), and the end of the laminar phase (tc) and we took pictures that were digitally processed in order to compute the ROI1/ROI2 value, assumed as a numerical index of ischemia of the optic disc. In the examined sample we found ta = 61 +/- 109, tb = 65 +/- 107, tc = 159 +/- 155, and ROI1/ROI2 = 0.968 +/- 0.300. Normal ranges for these parameters were determined by the fundus fluorescein angiography of a control group of 10 patients, unaffected by coronary artery disease and ischemic pathology of the retinal network; we found ta = 12 +/- 4, tb = 16 +/- 8.5, tc = 44 +/- 9.3, and ROI1/ROI2 = 0.735 +/- 0.086. Eighty-five percent of coronaropatic patients showed ischemia of the optic disc, 89% anomalies of the epi-peripapillar network, 70% anomalies of the papillo-macular network, and 89% evidence of at least two findings of ischemia; 85% of patients showed a value of ROI1/ROI2 out of the normal range. The unpaired Student's t-test between the coronaropatic and the control group does not show significant differences between ta and tb; on the contrary, those with coronary disease and the control group were statistically different for tc (p </= 0.02). Moreover, we have found a correlation between the numerical index of optic disc ischemia and the severity of coronary artery disease (r = 0.68, p </= 0.01). Hence, the vascular abnormalities shown by the fluorescein angiography can constitute valid noninvasive markers and can advise further cardiological tests for a coronary artery disease not yet diagnosed.

Journal Article↗
PubMed1991

Effects of a new aldose reductase inhibitor on diabetic complications in rats.

The effects of a new aldose reductase inhibitor, 7-fluoro-2-(N-methyl-N-carboxymethyl)sulfamoyl xanthone (BAL-ARI8, CAS 124066-40-6), on the diabetic complications of streptozotocin-induced diabetic rats were studied. The daily administration of BAL-ARI8 throughout the 8-week course of the experiment sharply decreased the sorbitol accumulation in the lens of the diabetic rats. The incidence of cataract formation was also reduced, being detected in only 45% of BAL-ARI8 treated animals, against the 100% of diabetic controls showing cataract after 8 weeks from diabetes onset. On the other hand, the serum glucose levels remained unchanged. In diabetic controls, there was about a 2.5-fold increase of the total protein urinary excretion during the 24 h. Treatment with BAL-ARI8 prevented up to 70% of this increase. Individual protein components were examined by polyacrylamide gel electrophoresis and quantitated by laser densitometric analysis. Diabetic-induced proteinuria primarily resulted from excretion of newly detected proteins with molecular weight in the range 30,000-60,000 D, together with an increase of albumin (25% of the total excretion) and the presence of new higher molecular weight proteins (greater than 66,000 D). BAL-ARI8 administration resulted in a shift of the protein profile back toward normality i.e. 73% of proteins with molecular weight below 30,000 D, 7.5% albumin and no proteins above 66,000 D. These results suggest that BAL-ARI8 may represent a therapeutic approach for the management of diabetic complications.

Aldehyde Reductase↗
PubMed1989

[A pharmacological and clinical review on the activity of a bovine factor VIII derivative obtained by enzymatic hydrolysis].

We report pharmacological, experimental and clinical data of the new drug which decreases bleeding time but is devoid of procoagulant and platelet aggregating properties. The drug, derived from bovine factor VIII by enzymatic hydrolysis, did not show toxicological and immunological effects either in animals or in patients. In addition we report the review of the clinical studies in different pathological situations i.e. ophthalmology, odontostomatology, gynecology etc.

Adult↗
PubMed1989

Decrease of diffusion of glycosylated albumin in retinal microcirculation by peptide fraction from bovine factor VIII.

The diffusion of the glycosylated albumin in the retinal vascular system has been studied in male New Zealand rabbits, using fluorangiographic techniques. A first group of animals was treated for 15 days with the peptide fraction from bovine Factor VIII (Vueffe); a second group, used as control group, was treated with physiological solution. At the end of treatment, glycosylated albumin was made fluorescent and then injected into the marginal vein of the rabbit. The direct observation and the photometric measurements performed on the digitized photograms with an image processing system showed a considerable reduction in retinic capillary diffusion of glycosylated albumin in the animals treated with the peptide fraction. The substance used in the study might therefore be of importance in the treatment of systemic disease with retinic vascular damage.

Angiography↗
PubMed1988

Polypeptide fraction from bovine factor VIII used in fluorangiography.

We report a new method of fluorangiography employing a polypeptide fraction from bovine factor VIII that has shown remarkable affinity to the endothelial surface of microvessels. Rabbits injected with this compound, labeled with fluorescein isothiocyanate, show a very delayed disappearance time of fluorescence in retinal vessels when compared with those injected with ordinary fluorescein. This allows a good observation of the late time, which is of great diagnostic advantage for several pathological conditions.

Animals↗