In retinoblastoma, genetic alteration of N-myc amplification different from the alteration of the RB1 gene on chromosome 13q14 has been described. This study is to determine the frequency of N-myc amplification by fluorescence in situ hybridization method in retinoblastoma. This study was prospectively derived from 26 patients who were diagnosed as having unilateral retinoblastoma (highly progressive large retinoblastoma, group 5 in Reese-Ellsworth classification) and underwent enucleation. We performed locus-specific fluorescence in situ hybridization probes for N-myc gene. Our results demonstrated that in only one of 26 patients was N-myc amplification found in retinoblastoma tissue. N-myc amplification has been regarded as one characteristic of retinoblastoma cell line and an adverse prognostic factor. However, our study indicates that N-myc amplification is not frequently found in retinoblastoma.
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Simultaneous single-nucleus RNA sequencing and single-nucleus ATAC sequencing of neuroblastoma cell lines.
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MYCN amplification is a hallmark of aggressive neuroblastoma, driving N-Myc overexpression and enhancing protein synthesis, making these processes potential therapeutic targets. Here, we present a protocol for quantifying nascent N-Myc and global protein translation in neuroblastoma cells. This protocol describes the steps for labeling nascent proteins and performing an optimized click chemistry reaction directly on the membrane after blotting, enabling high-sensitivity detection and analysis.
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