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Biomedical subjects

E Zanardi

Publications and source records attributed to E Zanardi.

At least 19 recordsLinked to original sources
PubMed2005

Comparison of contaminant and residue levels in organic and conventional milk and meat products from northern Italy.

Due to the growing interest in organic products, a comparison between the chemical safety of organic and conventional products was undertaken. Milk and meat were the products chosen for study. The parameters evaluated to assess chemical safety were organochlorine pesticides, polychlorinated biphenyls (PCBs), lead, cadmium and mycotoxin contamination. Pesticides and PCBs residues in both organic and conventional milk and meat were lower than legal limits. Lead and cadmium residues were very low and did not differ between organic and conventional products. However, aflatoxin M1 contamination in some but not all samples of organic milk was significantly higher than those of conventional milk, although factors other than organic production might be implicated.

Aflatoxin M1↗
PubMed2003

Residues of beta-lactam antibiotics in bovine milk: confirmatory analysis by liquid chromatography tandem mass spectrometry after microbial assay screening.

A procedure for the simultaneous determination of the residues of seven beta-lactam antibiotics (penicillin G, ampicillin, oxacillin, amoxicillin, dicloxacillin, cephalexin, cephapirin) in bovine raw milk using tandem liquid chromatography mass spectrometry (LC-MS/MS) is described. The antibiotics were extracted by an acetic acid solution after centrifugation and filtration. The beta-lactams were separated using reversed-phase liquid chromatography. A triple quadrupole mass spectrometer was used in positive-ion mode as a detector via a Turbo Ionspray interface for electrospray ionization (ESI). The limits of detection and quantitation of the method were below the legal tolerances, except for ampicillin. The method was used to confirm 53 samples found positive by a microbial method (Delvotest SP) at the Istituto Zooprofilattico Sperimentale per la Lombardia e l'Emilia Romagna of Brescia during 2001. Penicillin G was found in 26 samples at concentrations ranging from less than 4 to 6240+/-550 microg x l(-1). Amoxicillin was found in three samples at concentrations ranging from 8.5+/-0.1 to 53.7+/-2.3 microg x l(-1). Cephapirin was found in two samples at 5.7+/-0.1 and 6.4+/-0.3 microg x l(-1).

Animals↗
PubMed1998

Tibolone: a review.

Tibolone appears to be at least as efficacious as other forms of hormonal replacement therapy (HRT) on climacteric symptoms. It does not cause withdrawal bleeding when used in women with at least 1 year of amenorrhea. It is, therefore, not indicated in perimenopause because it may cause irregular bleeding. The androgenic action of tibolone may have a two-fold benefit: on the one hand, it may help depression and libido more than other forms of HRT, while, on the other hand, it may improve some lipid parameters such as Lp(a), and triglycerides. However, this androgenic action, may also be responsible for the reduction of HDL cholesterol, that may thus reduce the beneficial effect of tibolone on lipids. It is estimated that only 30% of cardiovascular risk protection of HRT is due to improvement of classical lipids parameters while a great role is played by the direct effect of estrogen on vessels. Tibolone, as well as estrogen, has been shown to induce peripheral vasodilatation and also has a direct effect on vascular reactivity thus increasing peripheral blood flow with no changes in blood pressure or cardiac output. Tibolone seems to exert a similar effect as other forms of HRT on markers of bone metabolism and bone mass, but no data is yet available on fracture prevention.

Anabolic Agents↗
PubMed1993

[Chlamydia trachomatis, pelvic inflammatory diseases and sterility].

The authors analyse the results of direct (cervical, urethral, tubal) and serological research of Chlamydia trachomatis in a sample population of 420 women undergoing celioscopy due to sterility and pelvic pain, paying particular attention to a group of 193 who were found to be suffering from PID (acute, sequelae). In terms of absolute numbers the correlation between chlamydial contact-PID-sterility is confirmed, whereas in an analysis of the levels of direct positivity it is only significant for acute PID, and in cases of sequelae and in sterility with chronic infection with or without tubal damage the direct identification of Chlamydia trachomatis does not differ much from controls. Salpingo-peritoneal isolation was found to be completely lacking in significance.

Acute Disease↗
PubMed1991

[HPV infections in the lower genital tract in the female. Results of beta-interferon treatment].

The Authors have analyzed the results obtained by treating 60 patients affected by HPV lesions of the lower female genital tract (flat vulvar, vaginal and cervical condylomatosis) with beta-interferon. At vulvovaginal level, the action of the drug is independent from the colposcopic aspect of the lesion but is closely correlated to its extension. The drug proved to be more efficacious at cervical level in case of condylomatous cervicitis rather than ANTZ with a reduction in the size of the lesion and disappearance, if present, of the dysplasia. The positive action of the beta-interferon has never occurred before 2-6 months from the end of the farmacologic treatment. The best results have been obtained in case of condylomatous cervicitis with complete remission in 58% of the cases, and in vaginal condylomatosis (CR at 6 months: 45%). On the basis of these results we may conclude that in these HPV lesions priority should be given to medical treatment whereas in vulvar condylomatosis (especially if extended greater than 1/3) where results are not very satisfactory (not more than 20% of CR) physical therapy is advisable.

Drug Evaluation↗
PubMed1987

Puerperal lactation, gonadotropin release and estradiol release: effects of metergoline and bromocriptine.

The exact cause of amenorrhea during the puerperium is still a matter of debate. PRL might inhibit primarily the release of FSH and LH or their stimulating effects on the ovary. In the study presented here, 28 healthy women were investigated, 13 of them lactating puerperae. In the other 15, lactation was prevented by drugs (metergoline in 9, bromocriptine in 6). The women's serum PRL, FSH, LH, beta-HCG and 17 beta-estradiol as well as their FSH and LH response to LHRH (100 micrograms i.v.) were tested 1, 3, 7 and 14 days after vaginal delivery. Serum PRL levels remained elevated in the lactating puerperae and dropped in the puerperae treated with metergoline or bromocriptine. The pattern of FSH, LH and beta-HCG levels as well as the FSH and LH response to LHRH were superimposable in lactating and in nonlactating women. 17 beta-estradiol levels dropped in all puerperae from day 1 to 7, but rose from day 7 to 14 only in the puerperae treated with metergoline or bromocriptine and not in the lactating women. These data indicate that PRL directly affects the ovarian response to FSH and LH, whereas the release of FSH and LH remains unaffected. A stimulatory effect of metergoline and bromocriptine on the ovarian steroidogenesis cannot be excluded.

Adult↗
PubMed1982

[Brain cortex phospholipids and pituitary gonadotropin incretion (diagnostic use of an acute BC-PL test in secondary amenorrhea of presumably diencephalic origin)].

Bovine brain cortex phospholipids (BC-PL) have a partially dopaminergic effect on the human CNS. This leads to modifications in gonadotropins (FSH, LH and prolactin) pituitary incretion in normal subjects. The Authors have developed an acute test for phospholipids (300 and 600 mg by fast i.v. injection) to be performed in patients suffering from secondary normoprolactinemic amenorrhea possibly of diencephalic origin (hypothesis: hypothalamus function test). In these subjects no change in FSH and LH incretion was observed, whereas blood prolactin levels appeared remarkably reduced. In a small group of patients affected by hyperprolactinemia brain cortex phospholipids produced a more rapid and more marked reduction in blood prolactin (similar to that caused by bromocriptine) in functional conditions in comparison to the organic ones.

Amenorrhea↗