Effect of VEGFR, PDGFR and PI3K/mTOR Targeting in Glioblastoma.

Resistance to targeted therapy is a well known obstacle in cancer therapy. The cross-talk between several growth factor receptors generates redundancy in their intracellular pathways that usually mediates resistance to receptor targeted therapy. Simultaneous inactivation of two or more growth factor receptors has been suggested to prevent the cross-talk between their signaling pathways and to better eliminate malignant cells. Here we found that targeted therapy against these receptors induced moderate cell death in glioblastoma cells. More important, dual PDGFR and VEGFR inactivation induced more pronounceable cell death compared to inactivation of each receptor alone but failed to induce synergistic cell death in glioblastoma. PI3K/mTOR dual targeting has been identified as an efficient therapeutic approach in several malignant diseases, including glioblastoma. Therefore, we also investigated the PI3K/mTOR pathways inhibition effect in glioblastoma cells. Our results showed that inactivation of PI3K/mTOR pathways were more efficient than PDGFR or VEGFR single targeting or their dual inhibition.

[The descriptive epidemiological aspects of bronchopulmonary neoplasms in Dolj County]. / Aspecte epidemiologice descriptive ale neoplasmului bronhopulmonar în judetul Dolj.

This study represents a descriptive epidemiologic analysis of the morbidity and mortality incidence by lung cancer in Dolj. The usual processing of the registered values in primary evidences (report of the new cases to 100,000 residents) is in accordance with the literature about the variation of the incidence depending on residential environment and sex greater values in urban environment and at man, beginning from the fifth decade of life. The epidemiologic analysis by indirect standardisation of the mortality and the morbidity emphasizes in Dolj higher incidence up to the media of the Dolj, specially in the rural environment, aspects that suggest the intervention of the environmental factors and behaviour factors in the etiology of the lung cancer.

[The diagnostic and treatment aspects in bronchopulmonary neoplasms in Dolj County]. / Unele aspecte ale diagnosticului si tratamentului în neoplasmul bronhopulmonar în judetul Dolj.

The study carried out during 1991-1995 concerns 50 subjects with lung cancer confirmed by microscopy registered in the Oncology Department of Craiova University Hospital. The patients were studied on terms of clinical stage which indicated the regime of treatment associations: surgery + chemotherapy + radiotherapy, chemo-radiotherapy, chemo-immunotherapy, in order to improve surviving. The treatment results were assayed for each group of patients according to the international criteria of treatment response evaluation. The efficiency of various cytostatics associations according to histopathologic form was finally evaluated on terms of asymptomatic period and survival duration.