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Biomedical subjects

E Zanella

Publications and source records attributed to E Zanella.

At least 19 recordsLinked to original sources
PubMed1991

Estrogen and progesterone receptors in the gallbladders from patients with gallstones.

Cytosolic receptors for estrogen and progesterone were assayed in 50 gallbladders from 29 women and 21 men who had cholecystectomies because of cholelithiasis. High-affinity (equilibrium dissociation constant, KD = 0.46 +/- 0.23 nmol/L of 24 cases) estrogen receptors were detected in 20 of 29 gallbladders from women (range = 1.6 to 32 fmol/mg protein; mean +/- S.D. = 10.9 +/- 8.1), whereas in men only 4 of 21 specimens contained detectable estrogen receptors. High-affinity (KD = 0.45 +/- 0.17 nmol/L; mean +/- S.D. of 41 cases) progesterone receptors were found in 25 of 29 gallbladders of women (range = 2 to 62 fmol/mg protein; mean +/- S.D. = 19.2 +/- 14.4) and in 16 of 21 gallbladders of men (range = 4 to 36 fmol/mg protein; mean +/- S.D. = 12.5 +/- 8.5). There is a statistically significant difference between men and women in the proportion of estrogen receptor-positive gallbladders, 19% and 69% for men and women, respectively. Progesterone receptors are present in similar proportion in the gallbladders of men (72.2%) and women (86.2%). In women a positive correlation between estrogen and progesterone receptors was found. Even in the absence of estrogen receptors, the gallbladders of men express progesterone receptors at levels similar to those observed in women. At least in cholelithiasic gallbladders, this suggests that a sex difference exists in the coexpression of estrogen and progesterone receptors. Such a difference could be related with the higher gallstone incidence in women than in men.

Cholelithiasis↗
PubMed1991

Aztreonam biliary excretion in bile duct ligated jaundiced rats.

An experimental study was undertaken to assess aztreonam biliary concentrations in bile duct ligated jaundiced rats. The study proved that aztreonam biliary concentrations are sufficient to inhibit Gram-negative bacteria within the first and the second hour after antibiotic administration. The experimental model suggests that clinical conditions such as lithiasis or neoplasms of the biliary tree should not totally inhibit the antibiotic excretion.

Animals↗
PubMed1987

Papillitis: a critical appraisal based on intraoperative radiomanometric evaluation.

Disagreement still prevails over intraoperative diagnosis of papillitis as shown by the variability in incidence reported with a wide range of percentage. A study, concerning 2957 biliary operations for benign diseases has been carried out in order to analyse the incidence of papillary disorders. Two periods have been considered: before and after the intraoperative employment of radiomanometry. Primary benign stricture of the papilla, diagnosed in 0.1% of the cases in the first period, was not found in the second period; papillitis associated with lithiasis of the gallbladder was recognized in 2.5 and 0.3% of the cases respectively (no cases in the last four years); papillitis associated with common bile duct stones was found, according to the period considered, in 11.6 and 2.4% of cases (1.4% in the last four years). These results seem to suggest that benign papillary stenosis is a rare pathologic entity, often overdiagnosed or misjudged, and that planning of surgical treatment of common bile duct stones should be carefully considered, taking into account this remark in order to avoid unnecessary procedures.

Ampulla of Vater↗
PubMed1987

Physiopathologic role of microlithiasis in gallstone pancreatitis.

A study of 108 patients with acute or acute relapsing gallstone pancreatitis was carried out in order to evaluate the incidence of biliary lithiasis and microlithiasis. The severity of pancreatic damage associated with both clinical states and the physicochemical characteristics of the minute stones were also evaluated. The results suggest that the risk of acute pancreatitis is increased in patients with microlithiasis and that in patients with acute pancreatitis due to microlithiasis the lesions are more severe. These results warrant the conclusion that cholecystectomy should be performed upon all patients with echographically detected microlithiasis, even in the absence of symptoms. Early surgical treatment must be performed whenever pancreatitis develops.

Acute Disease↗
PubMed1985

Hormonal studies in a patient with PP-producing tumors.

Five years after the removal of pure pancreatic polypeptide (PP) producing tumors, concentrations of circulating levels of PP, insulin, glucagon, and growth hormone in the basal state, after insulin-induced hypoglycemia, and after a protein-rich meal were determined in a patient with previous truncal vagotomy and Billroth II gastrectomy. Basal plasma levels of PP ranged between 2180 and 2660 pg/ml suggesting persistence or recurrence of PP producing tumors. Concentrations of the other hormones were within normal values. After insulin injection (0.1 U/Kg) levels of PP and glucagon were not modified while those of GH rose from 3.2 to 22.6 ng/ml. After a protein meal (450 gms. of cooked ground beef meat) a sharp rise of plasma PP was observed to a peak of 11310 pg/ml at 10 min. Moreover, plasma levels of immunoreactive insulin also showed an equally prompt rise to a peak of 532 microU/ml while plasma glucagon rose simultaneously to 448 pg/ml. The cause of the abnormal PP, insulin and glucagon responses could not be ascertained but we postulate that they are derived from pancreatic tumors of mixed cell type.

Blood Glucose↗
PubMed1983

Dose-response study with indoprofen i.v. as an analgesic in postoperative pain.

A double-blind, placebo-controlled parallel-group study was carried out in 100 patients with postoperative pain. The analgesic activity of indoprofen given in a single dose as an i.v. bolus followed by a 2-h infusion, at total doses of 100, 200, and 400 mg was investigated. The highest dose of 400 mg was given additionally as an i.v. bolus alone. Intensity of pain was assessed before, and 30 min, 1, 2, 4, 6 and 8 h after treatment on a 0-4 point scale. An overall assessment was made at the end of treatment by the investigator and the patient using a 0-4 point scale and a visual analogue scale. Statistical analyses according to a multiple regression model on rating scale scores at fixed times and on overall assessments showed: (i) indoprofen was always more active than placebo in providing pain relief; (ii) there was a significant dose--response relationship; and (iii) there was no difference between the two schedules of administration of the largest dose.

Abdomen↗