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Biomedical subjects

P Bevilacqua

Publications and source records attributed to P Bevilacqua.

At least 55 records · Page 3Linked to original sources
PubMed1988

Comparison of combined portal-arterial versus portal perfusion during liver procurement.

PAP of harvested livers is routinely used to minimize parenchymal anoxia during storage. PP is compared with PAP to evaluate the relative reliability of PAP. Sixty female Landrace pigs were used for 30 OLTs. Group 1 livers underwent PP, whereas group 2 livers were treated with PAP. The cold ischemic time was less than 120 minutes for both groups, with no warm ischemia. Intraoperative and 24-hour postoperative biochemical, coagulation, and histocytological data were analyzed. Morphological studies of cellular damage were based on the percentage of CVD and KP and classified as light, moderate, and severe damage. Data, at closing, were compared by using Fisher's test (group 1 v group 2,P = 0.003 for light damage and P = .04 for severe damage; first postoperative day for group 1 v group 2, P = .133 for light damage and P = .25 for severe damage. Blood samples at closing and 24 hours postoperatively showed significant differences between groups 1 and 2: At closing for groups 1 and 2, respectively: AST, 968.9 +/- 742.7 and 327.4 +/- 174.7 IU/L (P less than .001); ALT, 63.1 +/- 40.3 and 20.3 +/- 5.3 IU/L (P less than .001); AP, 292.2 +/- 107.1 and 139.5 +/- 45.3 IU/L (P less than .001); and 24 hours postoperatively for groups 1 and 2, respectively: AST, 1,664.9 +/- 917.8 and 419.3 +/- 230.9 IU/L (P less than .001): ALT. 180.4 +/- 28.9 and 66.4 +/- 17.5 IU/L (P less than .001); AP, 602.1 +/- 153.3 and 255.7 +/- 116.3 IU/L (P less than .01). Comprehensively, the results reflect a better perfusate distribution of the PAP livers compared with PP ones: uniform organ preservation, faster metabolic recovery, and reduced postoperative mortality.

Animals↗
PubMed1986

Leishmaniasis donovani presenting as an isolated lesion in the larynx.

A case of leishmaniasis of the larynx caused by Leishmania donovani occurring in a 42-year-old man is reported. The oral cavity and the upper respiratory tract are commonly involved in mucocutaneous American leishmaniasis, but are less frequently reported in the 'Old World'. The primary and isolated location in the larynx is exceptional. The immunoperoxidase technique using antisera to anti-L. donovani is a useful method to identify the parasite.

Adult↗
PubMed1981

[Not Available].

Explore the source record for details and available documents.

Diet↗
PubMed1978

Age-dependence of isoproterenol-induced DNA synthesis in submandibular glands of BALB/c mice.

The age-dependency of isoproterenol (IPR) induced DNA synthesis was investigated in different organs of Balb/c mice. Although modifications of the physiological rate of DNA synthesis after IPR injection occurred also in liver and spleen, a quasi-linear decrease of the peak of IPR response with advancing age was observed only in submandibular glands. Such a decrease was observed when animals were injected with 10(-4) g IPR per g body weight, lower doses being unable to discriminate between young and old mice. In spite of some differences between mice and rats, the early appearance and linearity of the age-dependency remain common features of IPR response.

Age Factors↗
PubMedDate not supplied

[Family burden in schizophrenia: effects of socio-environmental and clinical variables and family intervention].

OBJECTIVE: Description of burden, attitudes and received professional support in a sample of relatives of patients with schizophrenia recruited in 8 Italian Mental Health Services (MHS), stratified by geographic areas and population density. DESIGN: Cross-sectional study on key-relatives of clinically stable patients with a DSM-IV diagnosis of schizophrenia. Evaluation of: a) relationships of family burden with patient's clinical characteristics, family's socio-demographic variables, relative's attitudes toward the patient, professional and social support received by the family; b) differences in the levels of burden, attitudes and support received by the family with respect to geographical area and population density. SETTING: 8 Italian MHS stratified by geographic areas (Northern, Central, Southern Italy) and population density (urban vs. rural areas). MAIN OUTCOME MEASURES: Patient's clinical status and social functioning: BPRS and ADC. Family burden, attitudes and support received by the family: FPQ. RESULTS: Data on 144 patients and their key-relatives were collected. Higher levels of burden were found among relatives referring to Southern MHS. The burden was found positively correlated with the levels of patients' BPRS positive and manic/hostility symptoms and disability, and with the number of daily hours spent by the relative in contact with the patient, and negatively correlated with the levels of professional support received by the family. CONCLUSIONS: The results of this study highlight the need to provide rehabilitative programmes for patients with schizophrenia as well as informative and psychoeducational interventions for their families.

Adolescent↗
PubMedDate not supplied

Clinical management of a case of recurrent apocrine gland carcinoma of the scalp: efficacy of a chemotherapy schedule with methotrexate and bleomycin.

Apocrine carcinoma of the skin is a rare tumor. Wide surgical excision with complete removal of the neoplasm is the standard therapy and this appears to offer the best chance of cure. Radiotherapy may be used in case of local relapse or regional lymph node involvement. Systemic chemotherapy has not proved to be effective in the treatment of this tumor. We report on a 46-year-old woman with a recurrent apocrine carcinoma of the scalp that had previously been treated with surgery, radiotherapy and chemotherapy (Al-Saraff schedule). The patient was responsive to a second-line systemic chemotherapy regimen consisting of a weekly combination of methotrexate and bleomycin, and achieved long-term progression-free survival.

Antineoplastic Combined Chemotherapy Protocols↗
PubMedDate not supplied

Relationship of the epidermal growth factor-receptor to the growth fraction (Ki-67 antibody) and the flow cytometric S-phase as cell kinetics parameters, in human mammary carcinomas.

Epidermal growth factor (EGF) has been shown to have a mitogenic effect on some breast cancer cells lines in vitro. The growth of the subclass of human breast tumors which expresses the specific receptor for EGF seems to be mediated by autocrine mechanisms rather than steroid hormones. The expression of EGF-receptor, as detected by an immunocytochemical method, was compared with the Growth Fraction (GF) by the Ki-67 monoclonal antibody and the S-phase content as tumor proliferative activity indexes, and with DNA ploidy and some pathologic features in 86 stage I-II breast carcinomas. Overall 52 out of 86 (60%) of the tumors were EGF-receptor positive. There was no correlation between the cell kinetics parameters and the EGF-receptor status, suggesting that its expression may be unrelated to the proliferative activity of the tumor in these clinical stages and that the EGF-receptor GF and S-phase may be independent variables in breast cancer. In our series 57% of tumors were DNA aneuploid and only a trend was found towards EGF-receptor positivity (P = 0.08). There was no correlation between EGF-receptor expression and grading or node-status. The overall picture is that of an independent relationship between EGF-receptor with the cell kinetics parameters and ploidy, confirming the complex and heterogeneous biology of breast carcinoma. These results suggest the possibility of better recognition of subsets of patients with diverse tumor aggressiveness, combining together EGF-receptor status, cell kinetics and ploidy, with a better stratification for treatment options.

Antibodies, Monoclonal↗
PubMedDate not supplied

Breast cancer cell kinetics: immunocytochemical determination of growth fractions by monoclonal antibody Ki-67 and correlation with flow cytometric S-phase and with some features of tumor aggressiveness.

In operable breast cancer, cell kinetics can be utilized in the prediction of the clinical outcome of patients. The discovery of monoclonal antibodies recognizing antigens related to cell proliferation has permitted the assessment of cell kinetics by rapid and practical immunocytochemical methods. It is claimed that the Ki-67 mouse monoclonal antibody recognizes an antigen expressed in proliferating cells but not present in quiescent (G0) cells. To study the relationship between Ki-67 score and DNA flow cytometric S-Phase Fraction (SPF), the latter being one of the most widely used methods to assess cell kinetics, we compared these two techniques of measurement in 122 breast carcinomas using both for each specimen. In this series 90% of tumors were Ki-67 positive, with a median value of 7.5% (range 1% to 70%). DNA flow cytometric analysis revealed that 69 tumors (57%) were aneuploid, whereas 53 were diploid. The median SPF value was 8% for diploid and 15% for aneuploid tumors (range 2% to 32%). Ki-67 scores were significantly higher in the DNA aneuploid compared to the diploid carcinomas (p = 0.015). Overall, a good correlation was found between Ki-67 and SPF values both in diploid (r = 0.60) and in aneuploid (r = 0.38) tumors. High Ki-67 scores were associated with the presence of axillary lymph node metastases (p = 0.0023) and poor histologic differentiation (p = 0.0028). Menopausal status, tumor size and peritumoral vessel invasion were unrelated to the Ki-67 score. Over-expression of the Epidermal Growth Factor receptor (EGF-r) and the c-erbB-2 oncogene were not correlated with Ki-67 staining. In conclusion, in this study Ki-67 immunostaining correlated with other indices of cell proliferation (SPF and Grade) and with some features of tumor aggressiveness (DNA aneuploidy and lymph node metastases) but seemed to be independent of some biological markers (EGR-r and c-erbB-2). Since the major objective for assessing proliferative status in Stage I-II breast carcinoma is to determine prognosis, it will have to be evaluated whether the determination of the Growth Fraction has comparable or even greater prognostic value than other cell kinetics markers.

Aneuploidy↗