Unknown,Transcriptomics,Genomics,Proteomics

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Gene expression signatures for primary tumor and tumor-derived exosomes


ABSTRACT: To determine the different gene signatures between primary tumor and tumor-derived exosomes, we have employed RNA-sequencing as a discovery platform to identify gene signatures of tumor-derived exosomes, taking the original tumors as a control. We subcutaneously inoculated C57BL/6 mice with Lewis lung carcinoma (LLC). Three weeks later, tumor tissues were cut and tumor-derived exosomes were isolated as described in the "treatment protocol". Then, both exosomal RNA and tumor RNA were extracted and sequenced. From sequencing, we found that exosomal RNAs showed quite different transcript profiles from tumor RNAs. Examination of different gene signatures between primary tumor and tumor-derived exosomes. 2 replicates each.

ORGANISM(S): Mus musculus

SUBMITTER: Liu Yanfang 

PROVIDER: E-GEOD-80678 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Tumor Exosomal RNAs Promote Lung Pre-metastatic Niche Formation by Activating Alveolar Epithelial TLR3 to Recruit Neutrophils.

Liu Yanfang Y   Gu Yan Y   Han Yanmei Y   Zhang Qian Q   Jiang Zhengping Z   Zhang Xiang X   Huang Bo B   Xu Xiaoqing X   Zheng Jianming J   Cao Xuetao X  

Cancer cell 20160801 2


The pre-metastatic niche educated by primary tumor-derived elements contributes to cancer metastasis. However, the role of host stromal cells in metastatic niche formation and organ-specific metastatic tropism is not clearly defined. Here, we demonstrate that lung epithelial cells are critical for initiating neutrophil recruitment and lung metastatic niche formation by sensing tumor exosomal RNAs via Toll-like receptor 3 (TLR3). TLR3-deficient mice show reduced lung metastasis in the spontaneous  ...[more]

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