Disease-related cellular protein networks differentially affected under different EGFR mutations in lung adenocarcinoma
SCIENTIFIC REPORTS
Authors: Nishimura, Toshihide; Nakamura, Haruhiko; Yachie, Ayako; Hase, Takeshi; Fujii, Kiyonaga; Koizumi, Hirotaka; Naruki, Saeko; Takagi, Masayuki; Matsuoka, Yukiko; Furuya, Naoki; Kato, Harubumi; Saji, Hisashi
Abstract
It is unclear how epidermal growth factor receptor EGFR major driver mutations (L858R or Ex19del) affect downstream molecular networks and pathways. This study aimed to provide information on the influences of these mutations. The study assessed 36 protein expression profiles of lung adenocarcinoma (Ex19del, nine; L858R, nine; no Ex19del/L858R, 18). Weighted gene co-expression network analysis together with analysis of variance-based screening identified 13 co-expressed modules and their eigen proteins. Pathway enrichment analysis for the Ex19del mutation demonstrated involvement of SUMOylation, epithelial and mesenchymal transition, ERK/mitogen-activated protein kinase signalling via phosphorylation and Hippo signalling. Additionally, analysis for the L858R mutation identified various pathways related to cancer cell survival and death. With regard to the Ex19del mutation, ROCK, RPS6KA1, ARF1, IL2RA and several ErbB pathways were upregulated, whereas AURK and GSKIP were downregulated. With regard to the L858R mutation, RB1, TSC22D3 and DOCK1 were downregulated, whereas various networks, including VEGFA, were moderately upregulated. In all mutation types, CD80/CD86 (B7), MHC, CIITA and IFGN were activated, whereas CD37 and SAFB were inhibited. Costimulatory immune-checkpoint pathways by B7/CD28 were mainly activated, whereas those by PD-1/PD-L1 were inhibited. Our findings may help identify potential therapeutic targets and develop therapeutic strategies to improve patient outcomes.
Chemically Induced Degradation of Anaplastic Lymphoma Kinase (ALK)
JOURNAL OF MEDICINAL CHEMISTRY
Authors: Powell, Chelsea E.; Gao, Yang; Tan, Li; Donovan, Katherine A.; Nowak, Radoslaw P.; Loehr, Amanda; Bahcall, Magda; Fischer, Eric S.; Janne, Pasi A.; George, Rani E.; Gray, Nathanael S.
Abstract
We present the development of the first small molecule degraders that can induce anaplastic lymphoma kinase (ALK) degradation, including in non-small-cell lung cancer (NSCLC), anaplastic large-cell lymphoma (ALCL), and neuroblastoma (NB) cell lines. These degraders were developed through conjugation of known pyrimidine-based ALK inhibitors, TAE684 or LDK378, and the cereblon ligand pomalidomide. We demonstrate that in some cell types degrader potency is compromised by expression of drug transporter ABCB1. In addition, proteomic profiling demonstrated that these compounds also promote the degradation of additional kinases including PTK2 (FAK), Aurora A, FER, and RPS6KA1 (RSK1).
COA
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