Author: Ramon y Cajal, Santiago; Castellvi, Josep; Hümmer, Stefan; Peg, Vicente; Pelletier, Jerry; Sonenberg, Nahum
Title: Beyond molecular tumor heterogeneity: protein synthesis takes control Document date: 2018_2_21
ID: kqb475gu_8
Snippet: Pathologists have long recognized that not all cells within a given tumor express the same amounts of a large number of proteins. For example, the expression of cyclin D1 in mantle cell lymphoma is not homogeneous even when all of the tumor cells carry the signature CCND1-IGH translocation [17] . Likewise, hormone receptor expression in breast carcinoma is often non-homogenous and irregular within a given tumor bed. The protein intra-tumor hetero.....
Document: Pathologists have long recognized that not all cells within a given tumor express the same amounts of a large number of proteins. For example, the expression of cyclin D1 in mantle cell lymphoma is not homogeneous even when all of the tumor cells carry the signature CCND1-IGH translocation [17] . Likewise, hormone receptor expression in breast carcinoma is often non-homogenous and irregular within a given tumor bed. The protein intra-tumor heterogeneity is mirrored in some cases at the transcriptional level and has been well documented by single-cell RNA-sequencing in glioblastomas [18] . Moreover, the latter study noted variations in the expression level and differences in cell signaling receptor and cell proliferation markers. In addition, differences in post-translational modifications of a given protein among cancer cells in a single tumor have been documented [19, 20] .
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