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Biomedical subjects

C Leo

Publications and source records attributed to C Leo.

30 records · Page 2Linked to original sources
PubMed1979

[Influence of phenobarbital on hyperbilirubinemia caused by nicotinic acid and rifamycin--SV in healthy subjects].

Ten healthy subjects have been given before and after treatment with phenobarbital the following intravenous charges: a) nicotinic acid; b) rifamicyn-SV; c) simultaneous administration of the two drugs. Along with confirmatory evidence of the wellknown increase in bilirubinaemia (prevalently unconjugated), we have observed phenobarbital to attempts partially yet significantly that effect. On the base of direct experience on rat liver, we hypothise phenobarbital to increase the pool of the Y protein carrying cholephilic organic anions into the hepatocytes.

Adult↗
PubMedDate not supplied

Hypoxia and expression of the proapoptotic regulator BNIP3 in cervical cancer.

Hypoxia plays a major role in the malignant progression of tumors. Here, we investigate the expression of Bcl-2/adenovirus E1B 19 kd-interacting protein 3 (BNIP3), a proapoptotic Bcl-2 family member, and its relationship to hypoxia in cervical cancer cell lines and clinical samples of cervical cancer. Cervical cancer cell lines were grown under hypoxia or normoxia, and BNIP3 mRNA expression was examined by Northern blot analysis. In 50 patients with cervical cancer, intratumoral oxygen measurement with the Eppendorf electrode and needle biopsies of the tumor were performed. The obtained tissue was subsequently analyzed by immunohistochemistry with an anti-BNIP3 antibody. Cervical cancer tissue collected upon surgery was used for Northern blot analysis of in vivo BNIP3 mRNA expression. BNIP3 mRNA is strongly induced under hypoxic conditions in all cervical cancer cell lines investigated. Furthermore, Northern blot analysis revealed that BNIP3 mRNA is expressed in cervical cancer tissue. Using immunohistochemistry, we demonstrated that BNIP3 protein is expressed in 82% of the investigated cervical cancers and that more advanced tumor stages showed significantly stronger BNIP3 expression. However, we observed no correlation between BNIP3 expression and intratumoral hypoxia. In conclusion, BNIP3 is expressed in different cervical cancer cell lines as well as in clinical samples of cervical cancer. Although BNIP3 is clearly hypoxia-inducible in vitro, our results suggest additional mechanisms of BNIP3 regulation in vivo. Our findings therefore highlight a discrepancy between in vitro models of tumor hypoxia and the complexity of human cancer.

Carcinoma↗
PubMedDate not supplied

[Paucity of interlobular bile ducts in twins and maternal abuse of psychopharmaceuticals during pregnancy].

We report the case of twins with intrahepatic cholestasis in "paucity of interlobular bile ducts". Both the children presented an associated cardiac defect even if dissimilar and a transient tubulopathy. Despite the presence of these alterations we suppose that these cases can be included among the group of rare nonsyndromic paucity of interlobular bile ducts. The different extent of the pathology in the two patients suggest a toxic etiology which could have struck more severely the twin who were less protected by the utero-placental barrier. In the literature reports we found some cases of extrahepatic biliary atresia related with maternal amphetamine addiction, but no cases of intrahepatic atresia. As during pregnancy the mother had abused of a number of drugs and in particular of amphetamine, we suppose that the amphetamine addiction can account for the hepatic pathology.

Abnormalities, Drug-Induced↗