PubMed Health⌕ Search

Biomedical subjects

C Vacca

Publications and source records attributed to C Vacca.

At least 37 records · Page 2Linked to original sources
PubMed1994

O-[omega-(Dialkylamino)alkyl]oximes of (+)-1,7,7-trimethylbicyclo [2.2.1]heptan-2-one with hypotensive, antiinflammatory, analgesic, local anesthetic and other activities.

The synthesis of (+)-1,7,7-trimethylbicyclo[2.2.1]heptan-2-one O-[omega-(dialkylamino)alkyl]oximes by reaction of (+)-camphoroxime sodium salt with a series of omega-(chloroalkyl)dialkylamines in DMF solution is described. Some of the above compounds showed strong hypotensive, antiinflammatory, analgesic and local anesthetic activity in rats and mice, as well as moderate antiarrhythmic, antipyretic and in vitro platelet antiaggregating activity.

Analgesics↗
PubMed1994

Effects of some antineoplastic drugs (vincristine, doxorubicin and epirubicin) on human platelet aggregation.

The effects of some antineoplastic drugs (vincristine, doxorubicin and epirubicin) on collagen- and ADP-induced human platelet aggregation are investigated. Platelet rich plasma (PRP) and platelet poor plasma (PPP) from healthy male and female donors were used. The PRP was adjusted with analogous PPP to 300,000 platelets/microliters. Platelet aggregation was studied according to Born's turbidimetric technique using an Aggrecorder II PA 3220 with collagen at a concentration of 10 micrograms/ml and ADP at a concentration of 30 microM. Vincristine, doxorubicin and epirubicin significantly (p < 0.01) inhibited collagen- and ADP-induced platelet aggregation. The vincristine induced inhibition was higher than that induced by doxorubicin or epirubicin. The effects of doxorubicin and epirubicin were more intense on ADP-induced platelet aggregation than on the collagen induced one. Moreover, the doxorubicin inhibition of ADP-induced platelet aggregation was greater than the epirubicin one. In conclusion, our study shows that vincristine, doxorubicin and epirubicin inhibit human platelet aggregation. The present results may improve the therapeutic use of these drugs since it has been clearly shown that drugs with antiplatelet activity could block metastases.

Adenosine Diphosphate↗
PubMed1994

Effects of dietary vitamin D deficiency on the cardiovascular system.

Experiments were performed on normotensive rats exposed to vitamin D deficient and control diets from the 22nd to the 180th day of age. In 60-120- and 180-day-old rats. The following parameters were evaluated: a) The vasomotor responses elicited by receptor agonists in the absence and in the presence of the respective antagonists [L-norepinephrine (NE) before and 5 min after prazosin; L-isoprenaline (I) before and 5 min after DL-propranolol; L-dopamine (DA) before and 5 min after L-sulpiride or SCH 23390 or chlorpromazine; acetylcholine (Ach) before and 5 min after atropine; histamine (H) before and after chlorpheniramine; 5-hydroxytryptamine (5-HT) before and 5 min after methysergide or ketanserin]; by carotid-sinus baroreceptor stimulation (CO) before and 5 min after hexamethonium, and by electrical stimulation of the vagus peripheral head (V) before and after atropine; b) Reflex tachycardia elicited by bilateral carotid occlusion (CO) (for 40 sec) and by sodium nitroprusside; c) Catecholamine (norepinephrine, epinephrine) and arginine-vasopressin plasma levels; d) Cholesterol, triglyceride and electrolyte (Na+, K+, Cl-, Ca2+) serum levels. Our results showed that vitamin D deficient diets induced a decrease in pressor responses to NE and CO, and an increase in hypotensive responses to I, DA, Ach, H, 5-HT and V. Changes of arterial blood pressure, heart rate, catecholamine and arginine-vasopressin plasma levels were not observed. Cholesterol, triglyceride and electrolyte (Na+, K+, Cl-) serum levels were not modified, while Ca2+ serum levels decreased. In conclusion, our data suggest that vitamin D depletion can induce changes of pressor and depressor vasomotor responses and suppose a direct role for vitamin D in regulating vasomotor reactivity.

Animals↗
PubMed1993

Value of the CD25+ CD16+ cell determination in defining the prognosis of operable breast cancer patients.

The immunologic status of 40 breast cancer patients with operable disease and 50 healthy women was studied at the Division of Medical Oncology of the 2nd Medical School in Naples. Skin tests and lymphocyte subpopulation determination were performed. The same tests were repeated after surgery in the cancer patients. At the same time, the immunologic modifications during chemotherapy (CMF) were studied in a further 25 premenopausal breast cancer patients. The cancer patients did not show significantly different reactivity to recall antigens, nor did surgery or chemotherapy modify this parameter. The breast cancer patients showed a significantly higher CD4+/CD8+ ratio (2.07 +/- 1.06 vs. 1.56 +/- 0.58; p < 0.05) and a higher percentage of CD16+ cells (15.7 +/- 7 vs. 9.1 +/- 6; p < 0.001), than controls. Patients without axillary lymph node involvement showed higher CD4+/CD8+ ratio, CD16+ and CD25+ percentage than the N+ patients. The percentage of CD25+ cells (expressing functional IL-2 receptor) and CD16+ cells proved to be predictive of early relapse: in 14 patients who had relapsed at a 37 month median follow-up, mean CD25+ and CD16+ cell values at diagnosis were significantly lower than those in the remaining 26 (CD25+: 0.87 +/- 0.7 vs. 2.44 +/- 2.19, p < 0.01; CD16+: 9.4 +/- 6 vs. 17.3 +/- 5, p < 0.001). These data suggest that a functional activation may occur in operable breast cancer patients except those with axillary node metastatization (especially when more than 3 axillary lymph nodes are involved).(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1993

A clinical, genetic and echocardiographic study of hypertrophic cardiomyopathy in a large family.

OBJECTIVES: To confirm recent reports on the incidence of human lymphocyte antigens (HLA) in familial hypertrophic cardiomyopathy and to better define the genetic patterns found in these patients. METHODS: A large family (31 members, 18M, 13F, age range 6-80 years) with a high incidence of hypertrophic cardiomyopathy was screened for HLA, dermatoglyphic patterns and blood subtyping. RESULTS: Our finding show variable expression of the disease and reduced penetrance. No linkage between the disease-causing gene and HLA loci could be demonstrated in the family. There was no specific haplotype which present in all affected individuals and missing in all controls. Haplotype A2 B18 was the most commonly encountered in affected individuals but was absent in IV 3 and present in a few controls. No linkage was found between the disease-responsible gene and the blood groups. Finally, no typical pattern emerged from the dermatoglyphic studies. CONCLUSION: The genetic assessment of this family, in agreement with other European studies, showed no clear correlation between hypertrophic cardiomyopathy and blood groups ABO, Rh, Lewis, Duffy and was unable to show atypical or unusual dermatoglyphic patterns.

Adolescent↗
PubMed1993

Relationship between zinc and obesity.

Zinc has important effects on metabolism, and on the thermoregulation of obese individuals. The aim of our investigation was to evaluate the serum zinc levels in obese patients before and after severe hypocaloric diets and to evaluate its correlation with the body mass index (BMI). Patients followed a severe hypocaloric diet (737 Kcal) for 60 days. Serum Zn levels and BMI were evaluated. Zn levels in obese patients were significantly (p < 0.01) lower than in controls, whereas the BMI values were significantly greater. At the end a severe hypocaloric diet, serum Zn and BMI levels returned to normal values. Our data show a possible relationship of the serum Zn levels with the anabolic and catabolic mechanisms in obesity, although the exact metabolic role of this bio-element remains unclear.

Adult↗
PubMed1992

Effects of flunoxaprofen, a non-steroidal anti-inflammatory agent, on the cardiovascular system.

The effects of flunoxaprofen (FL) were investigated using anesthetized normotensive and spontaneously hypertensive (SHR) young and old rats. The animals were divided into two groups. One group received a non-steroidal anti-inflammatory agent at doses significantly inhibiting prostaglandin (PG)-cyclooxygenase; the other received no non-steroidal anti-inflammatory drugs. Oral pretreatment of anesthetized rats with flunoxaprofen (6.6, 11.5, and 19.9 mg/kg/day in the feed for 560 days) significantly increased the following responses: occlusion of the common carotid arteries, and reactivity to L-noradrenaline (NA) (i.v.), and angiotensin II (Ang) (i.v.). Pressor responses also increased in normotensive and in SHR rats treated with FL (20 mg/kg/day for seven days). The effects were more intense in the SHR rats. Moreover, oral pretreatment of normotensive rats with FL (20 mg/kg/day for seven days) partially yet significantly reduced the antihypertensive activity of etozolin (ET), a diuretic and antihypertensive drug. Our data confirm the important role of prostaglandins in the regulation of the cardiovascular system, and an increase in arachidonic acid metabolite biosynthesis with vasodilatory effects being part of the mechanism of action of some antihypertensive drugs.

Administration, Oral↗
PubMed1991

Beta 2-microglobulinuria as a predictor of death in a population exposed to Balkan endemic nephropathy.

During the year 1974, urinary beta 2-microglobulin (beta 2mu) was measured at monthly intervals using the first-morning urine sample of randomly selected individuals from the BEN affected village of Petka (416 persons) and from the nearby situated control village of Stubica (216 persons). Initial compliance was complete; over 90% of villagers had at least 10 tests performed. beta 2mu, as assessed by radial immunodiffusion (RID), was repeatedly (at least twice) positive in 12% and 1.4% of the populations of the endemic and control villages, respectively. Over the 15 years of follow-up (1974 to 1988), none from the control village developed BEN, while many medical records of the cohort exposed to BEN contained data suggestive of BEN. Death from/with BEN was used as a measure of outcome. Incidence density of 12 was 3.3 per 1000 person/years of observation (19/5723). A single positive beta 2mu test was a sensitive predictor of BEN death (sensitivity = 89.5%). Selecting two or more positive tests as the cut-off point, the specificity and positive predictive value were considerably increased. Using the sulfosalicylic acid test for detection of significant proteinuria, a similar level of validity indices was reached only by four testings.

Aged↗
PubMed1991

Beta 2-microglobulinuria in a population exposed to Balkan endemic nephropathy: inferences from repeated cross-sectional studies.

Baseline data from a study run in 1974, which comprised beta 2-microglobulinuria (beta 2mu) measurements at monthly intervals from 416 members in 112 households from the BEN affected village of Petka, were compared with the results of two subsequent, cross sectional studies. In June 1988, retesting involved 320 available persons from the same households. Another collection of 284 urine specimens took place in October 1989. Prevalence of tubular proteinuria was the same in 1988 and 1989 as it was in 1974, indicating that the level of exposure to nephrotoxic agent did not change over time. Over 94% of the individuals who were always beta 2mu negative in 1974 remained negative in 1988. By contrast, over two thirds (68.7%) of those who were positive two or more times 14 years ago, tested positive upon re-examination in 1988. Particular interest arises from the data on those initially repeatedly positive persons in whom the overt disease did not occur over time; moreover, some appeared to be unaffected in 1988 and 1989 according to our set of laboratory criteria. The results suggest occasional slow progression and even possible reversibility of tubular lesions in individuals living in the BEN affected environment.

Adult↗
PubMed1991

Beta 2-microglobulin studies in endemic Balkan nephropathy.

The diagnosis of BEN and its differentiation from other chronic interstitial nephropathies are difficult because of the insidious onset as well as nonspecific morphological changes in the kidney. Early diagnosis of this disease is by clinical and laboratory findings which have not been universally accepted. This study was designed to determine if the frequency of increased urinary beta 2-microglobulin (U beta 2m) in village populations at risk to develop BEN was significantly higher than that seen in a control population. Individuals in the two population samples were classified in one of three categories: healthy, suspect or diseased. There were 23 individuals who met the criteria for the clinical diagnosis of BEN. Twenty (87%) of these had one or more positive tests for increased U beta 2m. The prevalence of kidney disease in the endemic village population sample was 13.4 times that for the control village population sample. The data show that the healthy individuals living in a village where BEN is endemic have 6.4 times greater chance of having tubular proteinuria than those living in a control area. The coincidence of the finding of U beta 2m in the urine of 87% of those sick with BEN and in 37 of the 342 (10.8%) people judged to be free of kidney disease suggests that a positive U beta 2m test is an early indicator of exposure to a nephrotoxic agent.

Adult↗
PubMed1991

A fifteen year cohort based evaluation of beta 2-microglobulin as an early sign of Balkan endemic nephropathy.

The occurrence of elevated urinary beta 2-microglobulin (U beta 2m) has been established to be more common in village populations living in areas where BEN is endemic when compared to appropriate control population. In addition, beta 2-microglobulinuria is associated with BEN. It has been demonstrated that there is an increase in the U beta 2m in apparently healthy populations located in high risk areas. It is 15 years since the first systematic investigations of U beta 2m in the villages of Brod Posavina were conducted. The purpose of this study was to determine the value of a positive test for tubular proteinuria as defined by increased U beta 2m, in identifying individuals at risk to develop BEN. In these studies we followed two cohorts for 15 years: one group consisted of individuals who were positive for tubular proteinuria by U beta 2m testing in 1974; the second group was an age and sex matched group from the same village who were never positive after 12 testings in 1974. The results show that a positive test for U beta 2m is associated with 9.9 times greater relative risk of developing BEN when compared to controls that had no positive U beta 2m tests.

Adult↗
PubMed1990

Prevalence of antibody to hepatitis C virus (anti-HCV) in chronic liver diseases (CLD) in southern Italy.

Two hundred and sixty-three patients consecutively admitted to our Unit for CLD were investigated for the antibody to Hepatitis C Virus (anti-HCV) in the serum using the recently developed enzyme immunoassay. The overall prevalence of anti-HCV was 45%; in patients with cryptogenic CLD it was significantly higher (69%) than in patients with markers of viral hepatitis (15%). Anti-HCV was found in 62% of the patients with hepatocellular carcinoma; this finding favours a potential role of HCV in determining the neoplastic transformation of the cirrhotic liver. In alcoholic liver disease the prevalence of anti-HCV was 52%; this finding poses the interesting question of aethiology of liver damage in these patients. The presence of anti-HCV was significantly associated with older age, irrespective of aethiology and stage of liver disease. The importance of the detection of this antibody for the aethiological diagnosis of chronic liver damage remains to be elucidated.

Adult↗
PubMed1989

Immunodiagnosis of acute leukemia displaying ectopic antigens: proposal for a classification of promiscuous phenotypes.

The nature of the blast cells in 163 cases of acute leukemia was investigated by immunophenotyping, with particular emphasis on the expression of "ectopic" surface membrane structures. Although no antigen included in our panel except CD3 revealed absolute lineage restriction, immunological typing allowed a definite characterization of blast cells in more than 90% of cases. Four groups of patients were identified (A, B, C, D) with different degrees of antigen ectopic expression. We classified as group A leukemias (74%) those expressing conventional antigenic patterns, in absence of cross-lineage markers. Samples classified as group B (18%) showed a single ectopic membrane specificity, apparently discordant with the overall composite phenotype; such a "low-grade deviation" did not prevent a definite immunodiagnosis. Pattern C specimens (5%) revealed a promiscuous coexpression of markers related to different lineages (biphenotypic leukemias), whereas group D included unclassifiable phenotypes, characterized by no antigen or DR-only expression. Our findings suggest the possibility of interpreting complex phenotypic constellations of membrane markers in a consistent and logical manner.

Acute Disease↗
PubMed1988

Cancer antigen 125, tissue polypeptide antigen, carcinoembryonic antigen, and beta-chain human chorionic gonadotropin as serum markers of epithelial ovarian carcinoma.

Cancer antigen 125 (CA 125) is common to most epithelial ovarian tumors. Therefore, it is potentially a good marker of this disease. This hypothesis was evaluated by measuring the serum levels of CA 125 in 81 patients with ovarian cancer (25 with nonactive and 56 with active disease), in 105 patients of both sexes with nonovarian tumors, and in 171 healthy controls of both sexes. The serum levels of three other markers, tissue polypeptide antigen (TPA), carcinoembryonic antigen (CEA), and human chorionic gonadotropin, beta subunit (beta-hCG), were also measured in the same 357 subjects. The results of this study clearly indicate the clinical irrelevance of both CEA and beta-hCG as tumor markers in ovarian carcinomas. Conversely, the clinical usefulness of CA 125 and TPA was confirmed. In particular, CA 125 and TPA showed comparable sensitivity, while CA 125 showed a higher specificity for ovarian cancer than TPA. The association of CA 125 with TPA was very useful in continuous observation of patients with active disease in order to evaluate the clinical effectiveness of the therapy. Moreover, for patients in clinical remission, the markers allowed early detection of a recurrence of the disease.

Adult↗
PubMed1987

Isonicotinates, nicotinates and clofibrates of N-methyl-N-(2-hydroxyethyl or 3-hydroxypropyl)--1,3,3-trimethylbicyclo [2.2.1]heptan-2-endo-amine with hypocholesterolemic and hypolipidemic activity.

The synthesis of isonicotinic, nicotinic and clofibric esters (III a, b, c) and (IV a, b, c) starting from N-methyl-N-(2-hydroxyethyl or 3-hydroxypropyl)-1,3,3-trimethylbicyclo [2.2.1] heptan-2-endo-amine is described. In general these esters showed a normolipemic activity in rats; in particular, the isonicotinic ester (IV a) showed a hypocholesterolemic activity higher than that of clofibric acid.

Animals↗