Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

In situ depletion of Nuak1 in murine colon tumours

ABSTRACT: The aim of the project is to determine the impact of NUAK1 depletion on the transcriptome of in situ colon tumours. Tumours were initiated in Villin-CRE-ER;APC-floxed;DI-shNUAK1 mice, followed by treatment for 1 week with dextran sodium sulphate. 68 days after tumour initiation, NUAK1 shRNAs were induced by doxycycline administration (via gavage), or left un-induced. 6 tumours were harvested from NUAK1 shRNA expressing mice and 6 from controls. RNA was isolated using Qiagen RNEasy and analyzed by Illumina paired-end RNA-SEQ

INSTRUMENT(S): NextSeq 500

ORGANISM(S): Mus musculus

SUBMITTER: Daniel Murphy

PROVIDER: E-MTAB-6265 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Colorectal Tumors Require NUAK1 for Protection from Oxidative Stress.

Port Jennifer J Muthalagu Nathiya N Raja Meera M Ceteci Fatih F Monteverde Tiziana T Kruspig Björn B Hedley Ann A Kalna Gabriela G Lilla Sergio S Neilson Lisa L Brucoli Martina M Gyuraszova Katarina K Tait-Mulder Jacqueline J Mezna Mokdad M Svambaryte Silvija S Bryson Amy A Sumpton David D McVie Allan A Nixon Colin C Drysdale Martin M Esumi Hiroyasu H Murray Graeme I GI Sansom Owen J OJ Zanivan Sara R SR Murphy Daniel J DJ

Cancer discovery 20180302 5

Exploiting oxidative stress has recently emerged as a plausible strategy for treatment of human cancer, and antioxidant defenses are implicated in resistance to chemotherapy and radiotherapy. Targeted suppression of antioxidant defenses could thus broadly improve therapeutic outcomes. Here, we identify the AMPK-related kinase NUAK1 as a key component of the antioxidant stress response pathway and reveal a specific requirement for this role of NUAK1 in colorectal cancer. We show that NUAK1 is act ...[more]

PMID: 29500295

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Project description:Melanoma is an invasive malignancy with a high frequency of blood-borne metastases, but circulating tumor cells (CTCs) have not been readily isolated. We adapted microfluidic CTC capture to a tamoxifen-driven B-RAF/PTEN mouse melanoma model. CTCs were detected in all tumor-bearing mice, rapidly declining after B-RAF inhibitor treatment. CTCs were shed early from localized tumors and a short course of B-RAF inhibition following surgical resection was sufficient to dramatically suppress distant metastases. The large number of CTCs in melanoma-bearing mice enabled comparison of RNA sequencing profiles with the matched primary tumor. A mouse melanoma CTC-derived signature correlated with invasiveness and cellular motility in human melanoma. In patients with metastatic melanoma, CTCs were detected in smaller numbers in patients with metastatic melanoma and declined with successful B-RAF targeted therapy. Together, the capture of CTCs and their molecular characterization provide insight into the hematogenous spread of melanoma. We adapted a microfluidic platform, the HbCTC-Chip (Stott et al., 2010, Pubmed ID: 20930119), to capture melanoma CTCs derived from mouse tumors, using panels of antibodies against melanoma-specific cell surface markers, followed by staining for melanoma antigens and optimized on-chip fluorescent imaging. We used a tamoxifen inducible BRAF(CA/+)/PTEN(flox/flox) melanoma mouse model (Dankort et al., 2009, Pubmed ID: 19282848) derived from a C57BL/6 background. Such mice received focal subcutaneous injection of tamoxifen (Sigma) (50ul at 5mg/ml in 50% EtOH suspension) at the left flank at 6-7 weeks after birth. Blood samples were collected from five mice with high tumor burden following tamoxifen injection. Blood from each mouse was split and processed through the CTC-chips functionalized with anti-CSPG4/MCAM antibody and control IgGs, respectively. Matched primary (from the tamoxifen injection site) and metastatic (from upper or lower back) tumors were harvested from the same mouse and immediately flash-frozen in liquid nitrogen. RNA extraction, single molecular sequencing and determination of Digital Gene Expression was as in Yu et al., 2012 (Pubmed ID: 22763454). One of the five mice yielded no CTC or IgG data. In addition, skin was taken from a sixth mouse, which was a complete wild type C57BL/6 mouse (without the BRAF/PTEN transgenes).The skin was taken after euthanasia of the animal and was processed as the tissue from the matched primary and metastatic tumors.

Dataset Information

In situ depletion of Nuak1 in murine colon tumours

Publications

Colorectal Tumors Require NUAK1 for Protection from Oxidative Stress.

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