MCL1 amplification

Resistance to targeted therapy, ITH, and genomic instability driven by HRD may contribute to the persistence and recurrence of oligometastatic lesions in advanced NSCLC. Increased ITH and HRD events were associated with inferior clinical outcomes. These findings could help to further improve treatment strategies after LCT and after drug resistance in patients with oligometastatic NSCLC.

Genetic and expression alterations identified by the BostonGene Tumor PortraitTM TestEvent type analyzed in targeted panelsEvent typeCohort (N patients)*% cohort with event or # biomarkersEvents, status, or subtypeYesSNV/IndelMG (21)10%FAT4 Y558_V590delinsCAfs*5 LOF mutation COL2A1 W1348Nfs*13 LOF mutationYesSNV/IndelMD (40)6%KMT2B R1779* LOF mutation KMT2C S143Vfs*3 LOF mutation PRKDC Y4046* LOF mutationYesGermlineMG (21)5%MUTYH rs36053993, germline, pathogenicYesGermlineMD (40)3%BTD rs13078881, germline, pathogenicYesCNAMG (21)43%IGF1R amplification +8 copies MGMT loss FANCA loss MCL1 amplification +10 copies MYOCD amplification +3 copies AKT2 amplification +8 copies AMACR amplification +6 copies YAP1 amplification +7 copies TRAF2 loss EZH2 amplification +2 copies HMGA2 amplification +100 copies FRS2 amplification +61 copies DDIT3 amplification +39 copiesYesCNAMD (40)27.5%ERK1 amplification +2 copies FOXO1 amplification +5 copies HMGA2 amplification +2, +8 copies KMT2C amplification +3 copies NCOR1 amplification +7 copies TERT amplification +6 copies TSPAN31 amplification +30 copies HSF1 lossYesFusionsMG (20)10%MDM2-CR1 MDM2-TXNDC12 AC090825.1-IGF1RYesFusionsMD (39)15%FUS-KIAA1549 KIAA1549-CREB3L2 HMGA2-LRRC37A3 NAB2-STAT6 PPP1R12A-PAWR RB1-ZAR1LNoTMB**MG+MD (61)8%35.67 mut/Mb (Desmoid fibromatosis) 8.48 mut/Mb (Cutaneous angiosarcoma) 8.9 mut/Mb (Sarcoma, NOS) 16.1 mut/Mb (Skin Angiosarcoma) 18.8 mut/Mb (Undifferentiated pleomorphic sarcoma)NoMSI statusMG+MD (61)100%StableNoHLA loss of heterozygosityMG+MD (61)11%HLA-I LOH (Leiomyosarcoma (N=1), Ewing Sarcoma (N=1)) HLA-A (Dedifferentiated liposarcoma (N=1)) HLA-I (Chondrosarcoma (N=3), High-grade sarcoma (N=1))NoTargetable surface molecule overexpressionMG+MD (59)81%CTLA4, EGFR, ERBB2, MAGEA3, PD1, PDL1, TIM3, TROP, ERBB2, FOLR1, NECTIN4, ROR1, TROP2NoMolecular Functional PortraitTM typeMG+MD (59)32%FibroticNoMolecular Functional PortraitTM typeMG+MD (59)17%Immune DesertNoMolecular Functional PortraitTM typeMG+MD (59)24%Immune-Enriched, FibroticNoMolecular Functional PortraitTM typeMG+MD (59)27%Immune-Enriched, Non-fibroticNoMHC deficiencyMG+MD (59)3%MHC class I/II deficiencyNoMHC deficiencyMG+MD (59)3%MHC class II deficiencyNoFDA label biomarkersMG+MD (59)7 biomarkers- Desmoid fibromatosis, TMB 35.67 mut/Mb (Pembrolizumab) - Angiosarcoma, TMB 16.1 mut/Mb (Pembrolizumab); - Undifferentiated pleomorphic sarcoma, MSI, TMB 18.8 mut/Mb (Pembrolizumab); - Cutaneous angiosarcoma, PALB2 pathogenic germline variant (Olaparib); - Chondrosarcoma IDH1 R132L (Ivosidenib)NoTranscriptomic biomarkersMG+MD (59)29 biomarkersCD8+ T cell number; PDL1 expression level; SLFN11 expression level; SMARCB1 expression; CD8+ T cell numberNoDiagnostic biomarkersMG+MD (59)9 biomarkersNAB2-STAT6; MXI1-NUTM1; EWSR1-NR4A3; EWSR1-FLI1; EWSR1-CREB3L1; NAB2-STAT6----*RNA analysis failed for 2 patients. Therefore, any expression based analysis was performed on n=20 and n=39 for the MG and MD cohort, respectively. **Tumor mutational burden is considered high for FFPE samples when TMB>8mut/Mb.

Therapeutic targeting of the apoptotic process in breast cancer sub-types will be improved by a detailed understanding of the core players in the process, including anti-apoptotic BCL2 family proteins. A sub-set of breast cancers harbor amplifications of MCL1 and dysregulations of expression of most family members that could affect the sensitivity to their inhibition by altering the cell's apoptotic threshold.

Breast cancer cell line models faithfully depict the most common molecular aberration in BCL2 family proteins observed in clinical breast cancer samples, MCL1 amplifications. Basal cell lines may be a preferred target of MCL1 inhibitors. However, concomitant aberrations, as explored in this report, are likely to be involved in ultimate sensitivity to anti-apoptosis targeting therapies.

Our study sheds light on this rare tumor type, which shows aggressive biological behavior and few druggable alterations. The most distinctive molecular features of pancreatic USC are the paucity of SMAD4 alterations and recurrent KRAS amplification.

Strikingly, clinical sequencing data showed amplification of MCL1 or BCL2L1 (encoding Bcl-xL) in subsets of FGFR mutation-negative bladder cancer tissues. In conclusion, these findings suggest that exploiting apoptosis pathways may be a promising treatment strategy for patients with FGFR wild-type metastatic urothelial cancer with Mcl-1 or Bcl-xL overexpression.

All tumors were high-grade osteosarcoma of conventional subtype treated with standard MAP chemotherapy (cisplatin, doxorubicin, high-dose methotrexate) and surgical resection of the primary tumor... As anticipated, patients with bony recurrence with osteosarcoma had a dismal prognosis. This may influence patient and family considerations for treatment. Our data identify the rarity of bony metastatic disease at the time of first recurrence in non-metastatic osteosarcoma patients.

Given the multiple ways a CLL population in a patient can become resistant to ongoing VEN, it seems unlikely that simply adding other drugs at relapse will be durably effective in most patients. The data pinpoint NF-ΚB activation as a biomarker for in vivo VEN-resistance and provide a specific biological rationale for ceasing VEN in deep response, as is currently being used in time-limited and explored in response-directed regimens.

There were distinct molecular features in somatic variations and actionable alterations between GBSs and CCAs. In general, 44.3% of GBC and 46.3% CCA may benefit from targeted therapy and immunotherapy. This study could be helpful to establish treatment therapies for BTCs according to genetic information.

Overall, our results show that comparisons of samples obtained before treatment and at PD can give insight about innate and acquired resistance mechanisms to trastuzumab in stage IV, HER2-positive GC patients.

In a broader lung cancer cell line viability screen conducted with PRT1419, we observed that the presence of multiple, co-occurring alterations in SWI/SNF family members such as SMARCA4, ARID1A/B mutations and loss of SMARCA2 protein were associated with sensitivity to PRT1419. Based on these findings, preclinical evaluation of PRT1419 in other tumor types with recurrent SWI/SNF mutations is ongoing.

Finally, each patient had three to eight candidate driving mutations for targeted treatments. This study delves into the genomic complexity and the phylogenetic and evolutionary development of aggressive TNBC, supporting early metastatic development, and identifies specific genetic alterations associated with a response to targeted therapies.

The functional impact of these alterations is assessed using an unbiased shRNA screen in a PBL model. These analyses identify the IRF4 and JAK-STAT pathways as promising molecular targets to improve outcome of PBL patients.

In this study, we discovered shorter survival in midline glioma patients with PIK3CA and TERT mutations and with abnormal PI3K and cell cycle pathways. We also revealed a novel prognostic marker, MCL1 amplification that collectively provided new insights and opportunities in understanding and treating midline gliomas.