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Biomedical subjects

I Ricciardi

Publications and source records attributed to I Ricciardi.

At least 19 recordsLinked to original sources
PubMed2000

Recent mass invasion of the North American Great Lakes by Ponto-Caspian species.

The North American Great Lakes have been invaded and dramatically altered by more than 145 alien species. Many invasions have occurred during the past few decades because of the release of Eurasian ballast water from transoceanic ships. Current regulations require ships to exchange foreign ballast with highly saline water before entering the Great Lakes; this procedure should prevent colonization by strictly freshwater species, but species with broad salinity tolerance might survive transport in exchanged water. A recent series of invasions by euryhaline organisms from the Black and Caspian Seas region signals a new phase in the transformation of the Great Lakes - one that supports the concept of an 'invasional meltdown'.

Journal Article↗
PubMed1985

Effect of adjuvant tamoxifen and CMF on endocrine function of patients with operable breast cancer.

The effect of adjuvant CMF (cyclophosphamide, methotrexate and 5-fluorouracil) and tamoxifen (TM) on endocrine function was studied in 120 women with stage I-II operable breast cancer. Sixty patients were premenopausal, of whom 25 were treated with CMF for 9 months, 25 received CMF for 9 months + TM for 2 years, started concurrently, and 10 TM alone for 2 years. In all groups treatment was started within 4 weeks from mastectomy. Sixty patients were postmenopausal and they were all treated with TM alone for 2 years. Plasma levels of estrone + estradiol -17 beta (E1 + E2), follicle stimulating hormone (FSH), luteinizing hormone (LH), prolactin (Prl), and testosterone (T) were determined in all patients before surgery and again at 3-month intervals from initiation of the adjuvant therapy. In ten patients of each treatment group FSH-LH and Prl-TSH release was determined following stimulation with releasing hormones. CMF and CMF + TM therapy resulted in amenorrhea in the majority of premenopausal patients with decrease of E1 + E2 and elevation of FSH-LH plasma concentration to levels of the post-menopausal. In premenopausal women treated with TM a marked increase of E1 + E2 was observed with unaltered FSH-LH plasma concentration. A significant fall of Prl was also present in these patients. In postmenopausal women and premenopausal patients with CMF-induced amenorrhea TM produced a marked fall of FSH-LH and a decrease of Prl plasma level. In no patients was plasma T affected by any of the treatment regimens.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1979

Tamoxifen-induced regression of benign breast lesions.

Sixty-three patients with severe breast dysplasia were treated with tamoxifen, 10 mg/day from day 5 to day 25 of the menstrual cycle for 4 months. Lesions were assessed by mammography, thermography, and echography (A- and B-mode scanning). In 45 patients (71.43%) there was complete remission of symptoms and disappearance of lesions as assessed by echography and clinical examination. Some improvement was seen in 12 patients. In all but 2 of those in whom lesions disappeared completely, no recurrence was seen in 12 months after treatment was discontinued. Estrogen receptors were assayed in 10 patients, but were detected in none. A decrease of doubtful statistical significance was observed in some patients in basal and thyrotropin-releasing hormone (TRH)-stimulated levels of prolactin during the treatment period. No other significant or unequivocal change in endocrine parameters was observed during tamoxifen treatment.

Breast Diseases↗
PubMed1979

The growth-hormone in long-term steroid-treated patients with chronic active hepatitis.

To determine whether the hypothalamo-pituitary axis (HPA) became suppressed in patients with chronic active hepatitis (CAH) treated with prednisone or long-activity synthetic corticotrophin (L.A.S.C.) for at least 12 months 36 patients with CAH were assessed for growth hormone release following insulin hypoglycemia test (IHT). Sixteen out of the 36 patients were treated with steroids, 11 with L.A.S.C. and 9 were untreated. Sixteen patients were less than 12 years old of whom 8 were treated with prednisone and 5 with L.A.S.C. and 3 untreated. Suppression of HPA was observed only in two patients of whom one was treated with prednisolone for 24 months and the other one received L.A.S.C. for 23 months. Normal HPA was observed in all the other 34 patients. Two patients aged 6 and 8 years were treated with steroids for 3 and 6 years respectively and showed impairment of the growth in height and remained permanently stunted even when steroids had been discontinued. Our data suggest that both steroids and L.A.S.C. treatment does not impair HPA in patients with CAH when administered for less than two years.

Adolescent↗
PubMed1979

Abnormal steroid sulfate in plasma of women with intrahepatic cholestasis of pregnancy.

Concentrations of numerous sulfate steroids were checked in the plasma of 10 women in normal pregnancy (NP), 21 women with intrahepatic cholestasis of pregnancy (ICP) and 10 pregnant women suffering from viral hepatitis with jaundice (VHP). A considerable increase in 5 alpha pregnane and 5 beta pregnane 3 alpha, 20 alpha diols, mono- and disulfates and in 5 alpha pregnane 3 beta, 20 alpha diols disulfates was observed only in ICP and not in VHP. This observation permits us to hypothesize that these hormone changes can have a causative role in the pathogenesis of ICP.

Alanine Transaminase↗
PubMed1977

Relationship between germinal cells function and dynamics of FSH secretion.

Tubular histology was correlated to FSH levels assayed under basal conditions (8 cases) or in response to Gn-RH (24 cases) in 32 infertile males, in whom a testicular biopsy was indicated as part of the work-up. A good correlation was found between number of spermatogonia and primary spermatocytes and levels of FSH, under basal conditions or, even more, in response to Gn-RH; correlation was less close with respect to spermatids 1 and 2 and nonexistent with respect to Serotoli cells. In spite of those findings, when taking into account only mean counts of spermatogonia and primary spermatocytes, some overlapping of values in individual cases still existed. On the other hand, when correcting the above perameters for tubular diameter and number of tubules per LPF, a much closer correlation between parameters of tubular function and dynamics of FSH regulation was obtained; the overlapping of values was found only in 1 out of 32 cases.

Biopsy↗
PubMed1976

A case of hypogonadotrophic hypogonadism with anosmia (Kallmann's syndrome) in a male, with familial incidence of a small metacentric chromosome (47,XX, mat?+).

A case of Kallmann's syndrome in a male is reported. Besides the classical picture of hypogonadotrophic hypogonadism (demonstrated both by endocrine investigation and a testicular biopsy) with anosmia, a number of other unusual features are present including gynaecomastia, agencies of the anterior brachial muscles, some dental abnormalities, and dyschromatopsy. The karyotype, studied on peripheral lymphocytes, shows, in the propositus as well as in his mother, the presence in all mitoses of an extra small metacentric chromosome; its derivation is uncertain.

Adult↗
PubMed1975

Effect of quinestrol on plasma and urinary gonadotropins of postmenopausal women.

Ten postmenopausal women were given a 4-mg load of quinestrol by mouth and plasma FSH and LH were serially determined at monthly intervals. By bioassay, total urinary gonadotropins were also measured at the same times. Plasma FSH and apparent total gonadotropin levels in the urine were depressed to very low levels up to 3 months, while plasma LH was slightly affected. Tentative explanations of this discrepancy are presented.

Administration, Oral↗