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Biomedical subjects

G Rossi

Publications and source records attributed to G Rossi.

At least 883 records · Page 49Linked to original sources
PubMedDate not supplied

Abdominal cystic hydatid disease (CHD): classification of sonographic appearance and response to treatment.

The natural history of cystic hydatid disease (CHD) can be divided into two stages. The first is characterized by the proliferation of the parasite; the second is marked by involution, ie, when the hydatid undergoes spontaneous distress or is subjected to pharmacological treatment. Echography makes it possible to study this evolution and to evaluate the stages of this parasitic pathology. This study of the evolution of abdominal CHD in 81 patients suffering from 127 cysts, with or without Albendazole treatment suggests a new sonographic classification: type I: simple CHD; type II: multiple CHD, type III: with detachment of membrane CHD; type IV: mixed CHD, type V: heterogeneous CHD; type VI: hyperechogenic CHD; type VII calcified CHD. Forty-seven patients suffering from 90 cysts of types I, II, III, IV, and V were treated with Albendazole; 31, suffering from 34 CHD of types VI and VII, were not treated, as they were considered involutional; 3 patients with 3 cysts refused therapy. Albendazole treatment resulted in the disappearance of 9 and in the solidification of 62 cysts. Of the remaining cases of CHD, 10 cysts showed sonographic alterations and 5 showed no modifications. Surgery was necessary for 2 patients (4 cysts). This new classification seems to be an aid in the recognition of the natural and therapy-induced involution of CHD and seems to improve the evaluation of the efficaciousness of the therapy.

Albendazole↗
PubMedDate not supplied

A phase II trial of ProMACE-CytaBOM in previously untreated non-Hodgkin's lymphoma of intermediate- or high-grade histology.

Between November 1985 and June 1989 the aggressive combination chemotherapy programme ProMACE-CytaBOM was used at a community-based hospital as primary treatment for non-Hodgkin's lymphoma (NHL) of intermediate or high-grade histology in Ann-Arbor stages IB-IV. The 53 patients entering the study represented 90 per cent of all consecutive eligible patients with NHL diagnosed during the time period considered. Their median age was 54 years and median observation time was 36 months. Of 50 patients evaluable for response, 35 (70 per cent) achieved complete remission (CR), seven (14 per cent) partial remission, and five (10 per cent) were refractory. Treatment was given on an outpatient basis. Actually delivered drug doses ranged from 88 per cent to 97 per cent of the theoretical doses. Life-threatening toxicity was experienced by four patients. Treatment was stopped in three cases (6 per cent) because of toxicity and there was one treatment-related death. Actuarial 2-year disease-free survival of patients in CR was 73 per cent. Overall actuarial 3-year survival and disease-free survival were 67 per cent and 51 per cent respectively. High LDH level was a significant adverse prognostic factor both for achievement of CR (P less than 0.005) and for survival (P less than 0.0002). Age was of no prognostic importance. We conclude that ProMACE-CytaBOM is an effective, easy to administer and well-tolerated regimen for patients with aggressive NHL.

Antineoplastic Combined Chemotherapy Protocols↗
PubMedDate not supplied

Salmonella typhimurium infection of thoracic aorta aneurysm in immunocompetent subject. Case report and literature review.

The authors describe a Salmonella typhimurium infection of thoracic aorta aneurysm in an immunocompetent subject. The patient, a 62-year-old male, was found to have recurrent S. typhimurium bacteremia despite multiple antibiotic treatments. A roentgenogram of the chest, which was normal on admission, revealed the presence of a first arch enlargement of the heart shadow. A computed tomography confirmed the diagnosis. Surgical resection of the aneurysm was carried out with in situ prosthetic graft interposition. The surgical specimen culture yielded S. typhimurium. The postoperative course was uneventful. Twenty-four months after discharge the patient remained well. A review of English language literature is presented.

Aneurysm, Infected↗
PubMedDate not supplied

The GABAergic control of prolactin release is not affected by insulin-dependent diabetes mellitus: evidence from studies with sodium valproate.

In order to evaluate the influence of the GABAergic system in the regulation of PRL secretion in patients with IDDM, serum PRL levels were measured in 7 diabetics and in 7 normal men with sodium valproate (400 mg per os), a drug capable of increasing cerebral GABA concentrations. A significant decrease of serum PRL concentrations was observed between 30 and 120 min after sodium valproate administration in both control and diabetic subjects. The time course and magnitude of the sodium valproate effect were similar in all subjects. These data confirm the inhibitory control of the GABAergic system on PRL secretion in man as evidenced by the GABAergic drug sodium valproate. It is suggested that this system is not altered in diabetic patients.

Adult↗
PubMedDate not supplied

Effect of distamycin A on the primary and secondary immune response of mouse spleen cells in vitro against sheep erythrocytes.

The effect of distamycin A (DMC) on the primary and secondary immune response of mouse spleen cells, cultured in vitro in the presence of sheep erythrocytes as an antigen, was studied. It was found that the primary response was extremely sensitive to DMC during the first 24 hrs of culture and then gradually became more and more resistant to the immunosuppressive effect of the drug. Right from the start of culture, however, the secondary response was much more resistant than the primary one to the inhibitory action of DMC. These results could not be reproduced by treating the cultures with inhibitors of DNA-dependent DNA synthesis (such as cytosine arabinoside) or inhibitors of DNA-DEPENDENT RNA synthesis (such as actinomycin D).

Animals↗
PubMedDate not supplied

Calcium-sensing receptor gene polymorphisms in primary hyperparathyroidism.

The calcium-sensing receptor (CaR) polymorphism A986S has been found to be associated with higher serum calcium levels in normal subjects, suggesting that this amino acid change might decrease the inhibitory activity of the mutated receptor, render the parathyroid cells more prone to proliferate, and eventually increase the risk of developing primary hyperparathyroidism (PHPT). The aim of the present study was to investigate the frequency of this and other 2 known CaR polymorphisms (R990G and Q1011 E) in patients with PHPT and their effect on its phenotype. We studied 103 Italian patients with PHPT and 148 healthy Italian subjects and we compared the results in 50 pairs matched for sex, age and geographic provenience. A fragment of exon 7 of the CaR gene, containing the 3 polymorphic loci of interest (A986S, R990G, and Q1011E), was amplified by PCR and sequenced. Serum calcium and PTH levels, BMD and other biochemical and clinical parameters were evaluated. The frequency distribution of the A9865, R990G, and Q1011 E polymorphisms in the 103 PHPT patients was 39.8%, 5.8%, and 2.0%, respectively. There was no difference in the frequency of the 3 CaR polymorphisms in the 50 matched pairs of patients and controls. We found no significant difference in several clinical and biochemical parameters between PHPT patients carrying or not the 986S allele. Finally, no relationship was observed between the 986S genotype and total and ionized serum calcium in control subjects. The A986S CaR polymorphism is the most common in Italian PHPT patients and the allotype AS does not appear to play a relevant role in the pathogenesis of PHPT and its severity. The A986S polymorphism does not correlate with serum calcium levels in normal Italian subjects.

Adult↗
PubMedDate not supplied

Effect of lysine vasopressin on basal and TRH stimulated TSH and PRL release in normal men.

In order to test the possible effects of lysine vasopressin (LVP) on basal and TRH stimulated TSH and PRL release, an iv bolus of LVP (0.06 IU/kg bw) was injected alone or just before TRH (20 or 400 micrograms iv) in 18 normal male subjects. The administration of LVP modified neither the basal secretion of TSH and PRL nor the TSH and PRL release induced by 20 or 400 micrograms TRH. These data suggest that in humans, vasopressin is not involved in the control of TSH and PRL release at the anterior pituitary level.

Adult↗
PubMedDate not supplied

Reducing the occupational risk of infections for the surgeon: multicentric national survey on more than 15,000 surgical procedures.

The objective of this study was to find the incidence of accidental exposures to blood and body fluids among surgeons during operations and to describe their dynamics. A probabilistic model was also used to predict the cumulative 30-year risk to the surgeon of contracting hepatitis B and C viruses (HBV, HCV) or human immunodeficiency virus (HIV) infection and estimate the effect of preventive strategies in reducing this risk. A multicentric prospective survey, based on self-administered questionnaires, was conducted during a period of 6 months in 39 Italian hospitals. As accidental exposure to blood or body fluids occurred in 9.2% of 15,375 operations. In about 2% of procedures a parenteral-type injury, such as actual skin puncture or eye contamination, was suffered by the operating surgeon. A needle-stick injury was the commonest accident, and its occurrence was found to vary with the phase of the procedure and its length. The current lifetime risk of acquiring HBV, HCV, and HIV infection in our regions was estimated to be as high as 42.7%, 34.8%, and 0.54%, respectively. The adoption of preventive strategies is expected to reduce this risk to 21% for HBV, 16.6% for HCV, and 0.23% for HIV infection. Active immunization of surgeons against HBV is strongly recommended. The case is also made for the use of a face-shield combined with a permanent change in our surgical practice capable of reducing the current high rate of parenteral injuries.

General Surgery↗
PubMedDate not supplied

Intravenously infused substance P enhances basal and growth hormone (GH) releasing hormone-stimulated GH secretion in normal men.

The effect of synthetic substance P (SP), infused intravenously (IV) in doses of 0.5, 1, or 1.5 pmol/kg-1/min-1 over 60 min, on GH secretion was evaluated in seven healthy men. Substance P tests and a control test with normal saline were randomly performed at weekly intervals. No untoward side effects or changes in blood pressure were observed during SP infusions. Serum GH concentrations did not change when normal saline, the lowest dose, or the middle dose of SP were infused. In contrast, GH levels rose significantly when the highest dose of SP was given, with a mean peak two times higher than baseline. Further studies were performed to test the possible influence of SP on the GH response to GH-RH. For this purpose, seven other healthy men were tested with GH-RH (1 micrograms/kg body weight in an IV bolus) during saline or SP (1.5 pmol/Kg-1/min-1 x 60 min) infusion. The GH-RH induced a significant GH rise, with a mean peak seven times higher than baseline. When subjects were infused with SP, the GH response to GH-RH was greatly enhanced, with a mean peak 12 times higher than baseline. These results demonstrate for the first time in humans that the systemic infusion of SP stimulates GH secretion, and suggest that SP might interact with GH-RH in the stimulation of GH secretion.

Adult↗
PubMedDate not supplied

Polymorphism of A, B and H substances in seminal fluid.

The polymorphism of A, B and H substances recently described in human saliva has been studied in seminal fluid of 71 subjects. Semen was found to contain the same molecular species of A, B and H substances which were observed in saliva and red cells. The comparison of gel-chromatographic patterns of the saliva and semen of 40 subjects showed identical ABH patterns in 26 cases, while in the remaining 14 some differences were observed.

ABO Blood-Group System↗