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![(A) As in the Figure 4A, but assessing the enrichment for loss of the WT allele as the mechanism of mutant allele imbalance. (B) In HR+ HER2− breast cancers, the rate of LOH spanning ESR1 in tumors with or without ESR1 gain-of-function mutations and those acquired before or after endocrine therapy (asterisk, p value = 0.00015, Chi-squared test; numbers in black bars represent the number of affected cases). (C) Luciferase reporter activity (RLU) in HR− <t>SKBr3</t> cells ectopically expressing HA-ERα wild-type (WT) or the specified mutant in proportions equivalent to homozygous mutant (left) to heterozygosity (right) in hormone-depleted medium. Error bars are +/− SD from triplicate experiments. (D) Duration of time of patients with BRAF V600E-mutant metastatic melanomas on vemurafenib therapy as a function of allelic imbalance of V600E and the mechanisms thereof [median PFS is 31.7 months (95% CI, 6-not reached) for patients with loss of WT BRAF versus 6.5 months (4.8-12) in the rest; hazard ratio, 4.4; p value = 0.01]. Complete pathologic responses are indicated in dark blue (p value = 0.01 comparing patients whose tumors lost the WT allele to those whose tumors that do not, two-sided Fisher’s exact test). See also Figure S5.](https://pub-med-central-images-cdn.bioz.com/pub_med_central_ids_ending_with_4065/pmc06234065/pmc06234065__nihms-1509225-f0006.jpg)
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1) Product Images from "Widespread selection for oncogenic mutant allele imbalance in cancer"
Article Title: Widespread selection for oncogenic mutant allele imbalance in cancer
Journal: Cancer cell
doi: 10.1016/j.ccell.2018.10.003
Figure Legend Snippet: (A) As in the Figure 4A, but assessing the enrichment for loss of the WT allele as the mechanism of mutant allele imbalance. (B) In HR+ HER2− breast cancers, the rate of LOH spanning ESR1 in tumors with or without ESR1 gain-of-function mutations and those acquired before or after endocrine therapy (asterisk, p value = 0.00015, Chi-squared test; numbers in black bars represent the number of affected cases). (C) Luciferase reporter activity (RLU) in HR− SKBr3 cells ectopically expressing HA-ERα wild-type (WT) or the specified mutant in proportions equivalent to homozygous mutant (left) to heterozygosity (right) in hormone-depleted medium. Error bars are +/− SD from triplicate experiments. (D) Duration of time of patients with BRAF V600E-mutant metastatic melanomas on vemurafenib therapy as a function of allelic imbalance of V600E and the mechanisms thereof [median PFS is 31.7 months (95% CI, 6-not reached) for patients with loss of WT BRAF versus 6.5 months (4.8-12) in the rest; hazard ratio, 4.4; p value = 0.01]. Complete pathologic responses are indicated in dark blue (p value = 0.01 comparing patients whose tumors lost the WT allele to those whose tumors that do not, two-sided Fisher’s exact test). See also Figure S5.
Techniques Used: Mutagenesis, Luciferase, Activity Assay, Expressing
Figure Legend Snippet: KEY RESOURCES TABLE
Techniques Used: Recombinant, Luciferase, Plasmid Preparation, Mutagenesis, Transfection, Reporter Assay, DNA Sequencing, Sequencing, Software
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REAGENT or RESOURCE SOURCE IDENTIFIER Antibodies Rabbit polyclonal, Phospho-MEK (Ser217/221) Cell Signal Cat#9121; RRID: AB_331649 Rabbit polyclonal, Anti-MEK Cell Signal Cat#9122; RRID: AB_823567 Rabbit polyclonal, Phospho ERK (Thr202/Tyr204) Cell Signal Cat#9109; RRID: AB_331646 Rabbit polyclonal, Anti-ERK Cell Signal Cat#9102; RRID: AB_330744 Rabbit monoclonal, Anti-GFP Cell Signal Cat#2956; RRID: AB_1196615 Rabbit monoclonal, Anti-GAPDH Cell Signal Cat#2118; RRID: AB_561053 Biological Samples MSK-IMPACT Zehir et al. 2017 N/A Chemicals, Peptides, and Recombinant Proteins pEGPF-N1-MEK1 Addgene Cat#14746 3X-ERE-TATA-luciferase reporter Addgene Cat#11354 pRL-TK Renilla luciferase plasmid Promega Cat#E2231 HA-tagged WT ERα This study N/A pcDNA3.1 (EV) Thermo Fisher Cat#V79020 HA-tagged ERα Y537S This study N/A HA-tagged ERα D538G This study N/A Critical Commercial Assays QuikChange II XL Site-Directed Mutagenesis Kit Stratagene Cat#200521 SuperSignal West Pico Plus Chemiluminescent Thermo Fisher Cat#34577 Lipofectamine 2000 Transfection Reagent Invitrogen Cat#11668027 Dual-Luciferase Reporter Assay System Promega Cat#E1910 Deposited Data Prospective DNA sequencing This study Accession number for the prospective sequencing data reported in this study is EVA: PRJEB28874, https://www.ebi.ac.uk/eva/?eva-study=PRJEB28874 Experimental Models: Luciferase:Article Title: Widespread selection for oncogenic mutant allele imbalance in cancer Article Snippet: R code to perform the analyses described here is available with this manuscript ( https://github.com/taylor-lab/AI ) .. 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