Non-small cell lung cancer (NSCLC) results in high mortality and has gained increasing attention. C-Phycocyanin (C-PC) has been identified as a potential therapeutic inhibitor for NSCLC, but its underlying mechanism remains obscure. The gene expression of the long noncoding RNA neighbour of BRCAI RNA 2 (NBR2) in NSCLC cells was evaluated by quantitative reverse transcription-PCR. The cell capacity for proliferation and migration was examined by EdU and wound-healing assays. Furthermore, the viability and apoptosis of cells was measured with CCK-8 and annexin V/PI, respectively. Next, the protein level of activation of adenosine monophosphate- activated protein kinase and the rapamycin kinase (mTOR) signalling pathway-associated molecules was evaluated by western blotting. H292 cells were pre-treated with C-PC or transfected with plasmids encoding NBR2 or the shNBR2 plasmid, to over-express or knock down NBR2 expression, respectively. NBR2 expression was robustly down-regulated in NSCLC cell lines compared with a normal cell line (BEAS-2B). NBR2 over-expression inhibited migration and promoted apoptosis of H292 cells. Treatment of H292 cells with C-PC enhanced NBR2 levels in a dose- and time-dependent manner. Downregulation of NBR2 in H292 cells inhibited the activity of C-PC on cell proliferation, viability and clone formation. Further mechanistic investigation showed that the down-regulation of NBR2 abolished the modulatory effects of C-PC on the AMPK/mTOR signalling pathway. In conclusion, C-PC inhibits H292 cell growth by enhancing the NBR2/AMPK signalling pathway.
Pemetrexed představuje prvního zástupce z nové skupiny antifolátů – MTA (multi target antifolate). Klinické studie jednoznačně prokázaly jeho vysokou účinnost v léčbě NSCLC, a to jak v I. tak i ve II. linii a v udržovací léčbě při nízkém výskytu nežádoucích účinků. Jako u prvního cytostatika byla u něj prokázána souvislost účinnosti s histologickým typem nádoru, takže není indikován u nemocných s dlaždicobuněčným NSCLC. Nemocným je podáván v rámci komplexních onkologických center., Pemetrexed represents the first member of the novel class of antifolates – MTA (multitargeted antifolate). Clinical trials have clearly demonstrated its high efficacy in the treatment of NSCLC, both in the first-line and second-line setting as well as in maintenance therapy, with a low rate of adverse effects. It is the first cytostatic drug whose efficacy has been shown to be related to the histological type of tumour; therefore, it is not indicated in patients with squamous-cell NSCLC. Patients receive it during treatment at major cancer centres., František Salajka, and Lit.: 12