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GEO help: Mouse over screen elements for information. |
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| Status |
Public on Apr 16, 2020 |
| Title |
Expression data for Rab27a knockdown in the KPC 4662 pancreatic ductal adenocarcinoma cell line |
| Organism |
Mus musculus |
| Experiment type |
Expression profiling by array
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| Summary |
Pancreatic cancer is an aggressive malignancy, often diagnosed at metastatic stages. Several studies have implicated systemic factors, such as extracellular vesicle release and myeloid cell expansion, in the establishment of pre-metastatic niches in cancer. The Rab27a GTPase is overexpressed in advanced cancers, can regulate vesicle trafficking, and has been previously linked to non-cell autonomous control of tumor growth and metastasis, however, the role of Rab27a itself in the metastatic propensity of pancreatic cancer is not well understood. Here, we have established a model to study how Rab27a directs formation of the pre-metastatic niche. Loss of Rab27a in pancreatic cancer cells did not decrease tumor growth in vivo, but resulted in altered systemic myeloid cell expansion, both in the primary tumors and at the distant organ sites. In metastasis assays, loss of Rab27a expression in tumor cells injected into circulation compromised efficient outgrowth of metastatic lesions. However, Rab27a knockdown cells had an unexpected advantage at initial steps of metastatic seeding, suggesting that Rab27a may alter cell-autonomous invasive properties of the tumor cells. Gene expression analysis of gene expression revealed that downregulation of Rab27a increased expression of genes involved in epithelial-to-mesenchymal transition pathways, consistent with our findings that primary tumors arising from Rab27a knockdown cells were more invasive. Overall, these data reveal that Rab27a can play divergent roles in regulating pro-metastatic propensity of pancreatic cancer cells: by generating pro-metastatic environment at the distant organ sites, and by suppressing invasive properties of the cancer cells.
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| Overall design |
5 samples were analyzed. KPC 4662 parental cell line as well was KPC 4662 scramble were analyzed as controls while 3 separate knockdowns of Rab27a were analyzed .
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| Contributor(s) |
Kren N, Pylayeva-Gupta Y |
| Citation(s) |
32355248 |
| Submission date |
Apr 10, 2020 |
| Last update date |
May 12, 2020 |
| Contact name |
Yuliya Pylayeva-Gupta |
| E-mail(s) |
yuliyap1@email.unc.edu
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| Organization name |
UNC
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| Department |
Lineberger Comprehensive Center
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| Lab |
Pylayeva-Gupta Lab
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| Street address |
450 West Drive, CB 7295
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| City |
Chapel Hill, NC |
| State/province |
NC |
| ZIP/Postal code |
27599 |
| Country |
USA |
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| Platforms (1) |
| GPL17400 |
[MoGene-2_1-st] Affymetrix Mouse Gene 2.1 ST Array [transcript (gene) version] |
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| Samples (5)
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| Relations |
| BioProject |
PRJNA624272 |
| Supplementary file |
Size |
Download |
File type/resource |
| GSE148439_RAW.tar |
23.3 Mb |
(http)(custom) |
TAR (of CEL) |
| Processed data included within Sample table |
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