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Biomedical subjects

R Naccarato

Publications and source records attributed to R Naccarato.

At least 361 records · Page 20Linked to original sources
PubMedDate not supplied

[The effects of nizatidine and misoprostol on peptic activity and gastric mucus].

The effects of Nizatidine, an H2-receptor antagonist, and Misoprostol, a PGE1 analogue, on gastric pH, pepsin, pepsinogen group I and N-acetylneuraminic acid concentration were evaluated in a group of 20 patients with duodenal ulcer. Nizatidine decreased pepsin concentration while it increased gastric pH, although not to a significant degree and left pepsinogen group I and N-acetylneuraminic acid concentration unchanged. Misoprostol did not modify gastric pH, pepsin and N-acetylneuraminic acid values but it increased pepsinogen group I levels. These data support the view that H2-receptor antagonists, especially Nizatidine, and Misoprostol do not directly affect pepsin and/or N-acetylneuraminic acid concentration.

Adult↗
PubMedDate not supplied

[Gastrin tissue levels in patients with peptic ulcer: a different methodological approach].

The function of G cells has been mainly evaluated by serum gastrin. A different analytical approach considers the direct determination of gastrin levels (ng/g of wet tissue) in perendoscopic biopsies, but, up to now, the results are contradictory. In the present study we evaluated, by means of a RIA method, the concentration of gastrin (ng/g of protein nitrogen) in homogenized gastroduodenal biopsies in 127 patients with peptic ulcer and in 12 dyspeptic patients. The results demonstrated: 1) a significant gradient of gastrin concentrations among the different anatomical sites, according to the distribution of the G cells; 2) a correlation with serum gastrin levels; 3) a good equivalence of gastrin content in adjacent biopsy specimens. This preliminary report indicates that it is possible directly quantitate tissue levels of gastrin by means of an accurate and simple method.

Adult↗
PubMedDate not supplied

[Changes in the pattern of serum biliary acids and lipoprotein picture during therapy with biliary acids in cholesterol lithiasis].

Several studies are present in the literature about the efficacy of medical treatment with biliary acid, orally administered, on the symptomatic gallstone patients. Both this drugs act, with different mechanisms, on the same pathophysiological pathway, represented by the supersaturated bile in cholesterol. Aim of the present investigation was to study the possible modifications of serum bile acids pattern and of lipoproteins in a large sample of gallstone patients under long-term treatment with biliary acids. One hundred and twelve patients with radiolucent gallstones entered the study; 54 received chenodeoxycholic acid (CDCA) and 58 ursodeoxycholic (UDCA) at dosage of 15 mg/kg/daily. Blood samples for determination of serum cholesterol, triglycerides, phospholipids, lipoproteins, total and fractionated biliary acids were collected from each subjects every three months for a mean "follow-up" of 24 months. The levels of serum cholesterol, triglycerides and phospholipids showed a mild decrease only in the patients under therapy with CDCA, while no modifications were detected using UDCA. The same was found for two other parameters, HDL-cholesterol and lipoproteins, with both treatments during the overall period of follow-up. The biliary acids levels showed a significant increase only in the patients treated with CDCA, but no differences were found between "responders" and "non responders" to the therapy.

Adult↗
PubMedDate not supplied

[Cigarette smoking and group I pepsinogen levels. Study in a normal population].

Several studies have shown an influence of cigarette smoking on serum pepsinogen group I (PGI) levels in duodenal ulcer patients and in control subjects. The elevation of PGI in smokers has just been interpreted as reflecting some degree of smoking-induced inflammation of the gastric mucosa. We have determined fasting serum PGI by radioimmunoassay in 163 healthy subjects investigated by a survey conducted on a sample population of an urban area in the North-East of Italy by means of a random selection based on the public registers of home addresses. The data reported confirmed that PGI levels are increased by smoking in a healthy population. The main contribution of this study consists in demonstrating in a non-selected population an increase of the only parameter up to date claimed to be a possible serological predictive index for ulcer disease.

Adult↗
PubMedDate not supplied

[Development of gastric carcinoma at the site of a preceding peptic ulcer after 10 years].

We have observed an adenocarcinoma of the stomach which developed on the site where an apparently benign active gastric ulcer had been diagnosed radiologically 10 and 7 years previously. The patient had complained of recurrent episodes of epigastric pain over ten years, which were well controlled by the medical treatment. The length of clinical history in this patient makes it unlikely that his ulcer was neoplastic at the time of onset. This appears to be, therefore, one of the rare instances of development of a gastric carcinoma on the site of a previously benign peptic ulcer.

Adenocarcinoma↗
PubMedDate not supplied

Gastric and duodenal ulcer in the same patient.

UNLABELLED: No extensive endoscopic studies have been performed on the prevalence and the clinical outcome of association of gastric ulcer (GU) and duodenal ulcer (DU). The present investigation, partially retrospective and partially prospective, takes into account 715 patients with active ulcer demonstrated by endoscopy, followed-up for a mean period of 3.8-years; 23 of them (3.2%) were found to have synchronous or asynchronous gastric and duodenal ulcers. The following characteristics were investigated: age of onset of both diseases, ulcer family history, cigarette and alcohol consumption, nonsteroidal anti-inflammatory drugs abuse, serum pepsinogen group I, ABO and Lewis blood groups, healing and relapse rate under H2-blocker treatment. The first diagnosis (by either X-Ray or endoscopy) was DU in 500 subjects (70%), GU in 210 (29.3%) and synchronous gastric and duodenal ulcers in 5 (0.7%). After a median period of 10 years, 2.8% of DU patients developed a GU; after 2-12 yrs 1.9% of GU patients developed a DU. The clinical and biochemical findings of our GU/DU patients suggest that the two ulcers are related by chance. IN CONCLUSION: asynchronous GU/DU patients do not seem to have a distinct disease in the large spectrum of ulcer disease. Larger studies must be planned on synchronous GU/DU with the aim of assessing whether or not it represents a particular type of ulcer disease.

Blood Group Antigens↗