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Biomedical subjects

V Facchini

Publications and source records attributed to V Facchini.

At least 73 records · Page 4Linked to original sources
PubMed1984

Struma ovarii. Observations on three cases.

The true struma ovarii is a rare teratomatous neoplasia, composed with typical thyroid tissue. Generally it is asymptomatic or only determines a mild hypogastric weighting feeling. In a few subjects this neoplasm is secreting and rise to hyperthyroidism. The Authors describe the clinical and anatomopathological characteristics of 3 cases of true struma ovarii come to their observation. No malignant histologic features in any of them was seen. In the relatively short period of post surgical observations no women showed relapses or metastases. This confirms that true struma ovarii is usually a benign tumor.

Adult↗
PubMed1984

Transrectal ultrasonography and cervical neoplasia. A preliminary report.

Transrectal ultrasonography is a new diagnostic method recently introduced in the study of normal and pathologic pelvis. The Authors describe their preliminary experience with the use of a rectal linear probe in the evaluation of the carcinoma of the cervix. This ultrasonographic method has resulted very useful in providing an imaging of cervical cancer in evaluating its effective diffusion and in precising demeasurements of the neoplastic mass. The results are particularly encouraging and justify continued experimentation.

Female↗
PubMed1984

Brenner's tumor. Observations on six cases.

Brenner's tumor is a rare fibroepithelial ovarian neoplasia, histologically characterized by an epithelial component similar to the transitional epithelium of the urinary tract. The histogenesis of neoplasm, which only rarely secretes estrogens, is still controversial. The Authors describe the clinical and anatomopathological features of six cases come to their observation. Only one of these was malignant; the woman died 18 months after diagnosis. There is no strict correlation between histological picture and biological behaviour. Only this one can give assurance on the benign or malignant nature of Brenner's tumor.

Adult↗
PubMed1984

The role of computerized tomography of the pelvis in the presurgical staging of carcinoma of the cervix and of the ovary.

Computerized Tomography (CT) has largely contributed to the diagnosis of the pathology of the female pelvis. After setting up a technique to outline the different viscera the authors have employed this method in the staging of neoplastic pathology of the cervix and ovary. They describe the successes obtained and the main cause of error in the interpretation of the images of CT.

Diagnostic Errors↗
PubMed1983

Circulating beta-endorphin levels at various stages of life: possible connections with migraine pathogenesis.

Recently, the existence of a circulating peptide, beta-endorphin (B-EP) with potent analgesic properties has been revealed. Our group has evaluated B-EP plasma levels in several physiological and pathological models. The life span pattern of this newly identified hormone was characterized by a progressive increase during prepuberal development, by stable levels in adults with typical circadian and monthly variations, and by a decrease in aging subjects. Cerebrospinal fluid B-EP contents inversely showed a declining linear trend throughout life, which suggests an independent source of B-EP in this compartment. The concomitant changes in the reproductive system suggested the possible influence of gonads on B-EP plasma levels, as confirmed by decreasing B-EP levels in gonadectomized humans and rats. Headache, which is likely to occur concomitantly with hormonal milieu variations, appeared to be associated with a deficiency in the B-EP system, centrally and peripherally, the lowest values being found in the protracted forms of headache.

Adolescent↗
PubMed1982

Impaired pregnenolone secretion after combined cyproterone acetate and ethynyl estradiol therapy in hirsute patients.

6 women affected by hirsutism, either of idiopathic origin or due to polycystic ovary syndrome, have been treated with cyproterone acetate and ethynyl estradiol in combined therapy using, respectively, 100 mg and 50 micrograms/day, from the 5th to the 25th day of the cycle. The adrenal function was assessed before treatment and at the end of the 4th month of therapy, evaluating the peripheral plasma concentrations of pregnenolone (delta 5P), progesterone, 17-OH-progesterone, dehydro-epiandrosterone sulfate, androstenedione, testosterone, and cortisol in basal conditions and after dexamethasone suppression and an adrenocorticotropic hormone (ACTH) stimulation test. A group of healthy, untreated females were examined in the early follicular phase, as controls, Before therapy, the hirsute patient showed testosterone and androstenedione plasma levels, which were significantly higher than in the controls, and a significant reduction in pregnenolone response to ACTH. After 4 months of therapy with cyproterone acetate plus ethynyl estradiol, a significant decrease was found in testosterone and androstenedione plasma levels, and pregnenolone basal plasma levels, dexamethasone suppressibility, and response to ACTH were also markedly reduced, showing a significant difference versus the same patients before therapy and versus the control group. The existence of an impairment in adrenal function after cyproterone acetate plus ethynyl estradiol therapy at the given dose seems to be evident only in the case of directly ACTH-dependent adrenal enzymatic activities responsible for cholesterol cleavage to pregnenolone.

17-alpha-Hydroxyprogesterone↗
PubMed1982

Incidence of malignant ovarian neoplasms in the provinces of Pisa, Lucca, Livorno and La Spezia during the period 1976-1981.

The Authors report a critical review of all the cases of ovarian neoplasia observed in the provinces of Pisa, Livorno, Lucca and La Spezia between 1976 and 1981. This study does not take into account all the cases in which incomplete clinical and histologic data were available or the first histologic diagnosis was not confirmed by a second examination. The incidence rate and distribution characteristics of all the histologic types of ovarian neoplasia are described.

Adult↗
PubMed1981

Effect of dose on acetylator phenotype distribution of hydralazine.

The effect of dose on acetylator phenotype distribution of hydralazine has been determined, The acetylated metabolites methyltriazolophthalazine (MTP) and 3-hydroxymethyltriazolophthalazine (3-OHMTP) and acid-labile hydralazine (HP) were determined in the 0- to 24-hr urine of patients receiving various doses. The difference between the mean value for the ration 3-OHMTP:HP in the rapid and slow acetylators varied with dose, the greatest difference being after a 200 mg (100 mg twice daily) dose. The distribution of the ratio became less clearly bimodal at lower doses, with overlap between phenotypes occurring at doses of 100 mg (50 mg twice daily) or less. The most effective dose for discriminating between acetylator phenotypes was found to be 200 mg (100 mg twice daily).

Acetylation↗
PubMed1981

Further evidence for an acetylator phenotype difference in the metabolism of hydralazine in man.

1 The 0-24 h urine from hypertensive patients treated with hydralazine (100 mg twice daily) has been analysed by gas chromatography and high pressure liquid chromatography. 2 4-N-Acetylhydrazinophthalazine-1-one (NAcHPZ), s-triazolo [3, 4-a] phthalazine (TP), phthalazinone (PZ) and hydralazine (free, H; acid-labile hydrazones, HH) were detected and assayed. 3 The results indicate that slow acetylators excrete less NAcHPZ and TP than rapid acetylators but more PZ and HH. 4 Free hydralazine was present in low levels and was only detected in some urine samples. 5 The ratios of the metabolites NAcHPZ/HH; TP/HH; NAcHPZ/PZ and PZ/TP are different in the two acetylator phenotypes. 6 It is possible the ratio PZ/TP may be used for determination of acetylator phenotype. 7 It is concluded that hydralazine metabolism is dependent on the acetylator phenotype.

Acetylation↗
PubMed1980

Determination of hydralazine metabolites: 4-hydrazino-phthalazin-1-one and n-acetylhydrazinophthalazin-1-one by gas chromatography and s-triazolo[3,4-alpha]phthalazine and phthalazinone by high-performance liquid chromatography.

Methods are described for the determination of 2-N-acetylhydrazinophthalazin-1-one, 4-hydrazinophthalazin-1-one, phthalazinone and s-triazolo[3,4-alpha]phthalazine in human urine. 4-Hydrazinophthalazin-1-one and 4-N-acetylhydrazinophthalazin-1-one (following acid hydrolysis) are reacted with acetylacetone to give a distinctive pyrazole derivative which can be determined by gas chromatography using a nitrogen-specific detector. Phthalazinone and s-triazolo[3,4-alpha]phthalazine are measured underivatised by high-performance liquid chromatography.

Chromatography, Gas↗
PubMed1980

Polymorphic acetylation of hydralazine.

The acetylation of hydralazine has been studied in hypertensive patients undergoing maintenance therapy with the drug. The patients were acetylator phenotyped with sulfamethazine. Using gas-liquid chromatography and high-pressure liquid chromatography, hydralazine and two of its acetylated metabolites, methyltriazolophthalazine (MTP) and 3-hydroxymethyltriazolophthalazine (HOMTP), have been determined in the 0- to 24-hr urine. The excretion of hydralazine and HOMTP but not MTP was found to be related to the acetylator phenotype. The metabolic ratio HOMTP: hydralazine showed a bimodal distribution and the average ratio for slow acetylators (1.6) was lower than the ratio in rapid acetylators (14.9). It is concluded that hydralazine is polymorphically acetylated in man. The acetylated metabolite HOMTP was not, however, the major metabolite reported previously.

Acetylation↗
PubMed1980

The metabolic fate of nitromide in the rat. I. Metabolism and excretion.

1. Following oral administration of nitromide (3,5-dinitrobenzamide) to rats, 67.9% of the dose was excreted in urine and 32.6% in the faeces in 96 h. Significant biliary excretion of nitromide metabolites also occurred, although no evidence of enterohepatic cycling was obtained. Direct secretion of nitromide metabolites into the gastro-intestinal lumen via the mucosa was detected in surgically modified rats. 2. Six faecal, six urinary and three biliary metabolites, all of which were in a reduced form (as monoamines, diamines and their conjugates) were detected following oral administration. 3. The blood of these animals contained reduced metabolites only, as early as 1 h after oral or intraperitoneal administration of nitromide.

Animals↗
PubMed1980

Metabolism of nitromide in the rat. II. Sites of nitro-reduction.

1. Nitromide (3,5-dinitrobenzamide) is reduced to monoamino- and diamino-metabolites in vitro on anaerobic incubation with rat intestinal microflora. This conversion is suppressed by the antibiotics neomycin, tetracycline and bacitracin. 2. Nitromide is also in part reduced to monoamino but not diamino metabolites when incubated aerobically with homogenates of rat liver. 3. Pretreatment of rats with the antibiotics did not decrease their ability to form monoamino metabolites from nitromide, although formation of diamino metabolites was suppressed. 4. An antibiotic regime shown to suppress the methaemoglobinaemia resulting from the administration of nitrobenzene did not significantly reduce the methaemoglobinaemia resulting from the administration of nitromide.

Animals↗