1. Nuclear magnetic resonance metabolic fingerprint of bevacizumab in mutant IDH1 glioma cellsTanja Mesti, Nadia Bouchemal, Claire Banissi, Mohamed N. Triba, Carole Marbeuf-Gueye, Maja Čemažar, Laurence Le Moyec, Antoine F. Carpentier, Philippe Savarin, Janja Ocvirk, 2018, izvirni znanstveni članek Povzetek: Malignant gliomas are rapidly growing tumours that extensively invade the brain and have bad prognosis. Our study was performed to assess the metabolic effects of bevacizumab on the glioma cells carrying the IDH1 mutation, a mutation, associated with better prognosis and treatment outcome. Bevacizumab is known to inhibit tumour growth by neutralizing the biological activity of vascular endothelial growth factor (VEGF). However, the direct effects of bevacizumab on tumour cells metabolism remain poorly known. Materials and methods The immunoassay and MTT assay were used to assess the concentration of secreted VEGF and cell viability after bevacizumab exposure. Metabolomic studies on cells were performed using high resolution magic angle spinning spectroscopy (HRMAS). Results mIDH1-U87 cells secreted VEGF (13 ng/mL). Regardless, bevacizumab had no cytotoxic effect, even after a 72h exposure and with doses as high as 1 mg/mL. Yet, HRMAS analysis showed a significant effect of bevacizumab (0.1 mg/mL) on the metabolic phenotype of mIDH1-U87 cells with elevation of 2-hydroxyglutarate and changes in glutamine group metabolites (alanine, glutamate, glycine) and lipids (polyunsaturated fatty acids [PUFA], glycerophosphocholine, and phosphocholine). Conclusions In mIDH1-U87 cells, changes in glutamine group metabolites and lipids were identified as metabolic markers of bevacizumab treatment. These data support the possibility of a functional tricarboxylic acid cycle that runs in reductive manner, as a probable mechanism of action of bevacizumab in IDH1 mutated gliomas and propose a new target pathway for effective treatment of malignant gliomas.
Ključne besede: symptomatic pseudoprogression, atypical response, immunotherapy, lung cancer, idh1 mutation, malignant glioma, bevacizumab, metabolic fingerprint
Objavljeno v DiRROS: 11.06.2024; Ogledov: 39; Prenosov: 13
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2. Clinical and molecular practice of European thoracic pathology laboratories during the COVID-19 pandemic. The past and the near futurePaul Hofman, M. Ilié, E. Chamorey, P. Brest, R. Schiappa, V. Nakache, M. Antoine, M. Barberis, H. Begueret, F. Bibeau, Izidor Kern, 2020, izvirni znanstveni članek Povzetek: Background: This study evaluated the consequences in Europe of the COVID-19 outbreak on pathology laboratories orientated toward the diagnosis of thoracic diseases. Materials and methods: A survey was sent to 71 pathology laboratories from 21 European countries. The questionnaire requested information concerning the organization of biosafety, the clinical and molecular pathology, the biobanking, the workload, the associated research into COVID-19, and the organization of education and training during the COVID- 19 crisis, from 15 March to 31 May 2020, compared with the same period in 2019. Results: Questionnaires were returned from 53/71 (75%) laboratories from 18 European countries. The biosafety procedures were heterogeneous. The workload in clinical and molecular pathology decreased dramatically by 31% (range, 3%-55%) and 26% (range, 7%-62%), respectively. According to the professional category, between 28% and 41% of the staff members were not present in the laboratories but did teleworking. A total of 70% of the laboratories developed virtual meetings for the training of residents and junior pathologists. During the period of study, none of the staff members with confirmed COVID-19 became infected as a result of handling samples. Conclusions: The COVID-19 pandemic has had a strong impact on most of the European pathology laboratories included in this study. Urgent implementation of several changes to the organization of most of these laboratories, notably to better harmonize biosafety procedures, was noted at the onset of the pandemic and maintained in the event of a new wave of infection occurring in Europe.
Ključne besede: covid-19, pathology, safety, lung neoplasms, biosafety, lung cancer
Objavljeno v DiRROS: 18.01.2021; Ogledov: 1396; Prenosov: 679
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