{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Wanigasooriya K"],"funding":["Cancer Research UK"],"pagination":["920444"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC9289101"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["12"],"pubmed_abstract":["<h4>Objectives</h4>Partial or total resistance to preoperative chemoradiotherapy occurs in more than half of locally advanced rectal cancer patients. Several novel or repurposed drugs have been trialled to improve cancer cell sensitivity to radiotherapy, with limited success. We aimed to understand the mechanisms of resistance to chemoradiotherapy in rectal cancer using patient derived organoid models.<h4>Design</h4>To understand the mechanisms underlying this resistance, we compared the pre-treatment transcriptomes of patient-derived organoids (PDO) with measured radiotherapy sensitivity to identify biological pathways involved in radiation resistance coupled with single cell sequencing, genome wide CRISPR-Cas9 and targeted drug screens.<h4>Results</h4>RNA sequencing enrichment analysis r"],"journal":["Frontiers in oncology"],"pubmed_title":["Patient Derived Organoids Confirm That PI3K/AKT Signalling Is an Escape Pathway for Radioresistance and a Target for Therapy in Rectal Cancer."],"pmcid":["PMC9289101"],"funding_grant_id":["S_3655","C31641/A23923"],"pubmed_authors":["Pickles OJ","Whalley CM","Tyler R","Yau C","Bryer C","Wanigasooriya K","Barros-Silva JD","Hoare R","Stockton J","Tee L","Stodolna A","Beggs AD","El-Asrag ME","Sillo T","Ismail T"],"additional_accession":[]},"is_claimable":false,"name":"Patient Derived Organoids Confirm That PI3K/AKT Signalling Is an Escape Pathway for Radioresistance and a Target for Therapy in Rectal Cancer.","description":"<h4>Objectives</h4>Partial or total resistance to preoperative chemoradiotherapy occurs in more than half of locally advanced rectal cancer patients. Several novel or repurposed drugs have been trialled to improve cancer cell sensitivity to radiotherapy, with limited success. We aimed to understand the mechanisms of resistance to chemoradiotherapy in rectal cancer using patient derived organoid models.<h4>Design</h4>To understand the mechanisms underlying this resistance, we compared the pre-treatment transcriptomes of patient-derived organoids (PDO) with measured radiotherapy sensitivity to identify biological pathways involved in radiation resistance coupled with single cell sequencing, genome wide CRISPR-Cas9 and targeted drug screens.<h4>Results</h4>RNA sequencing enrichment analysis r","dates":{"release":"2022-01-01T00:00:00Z","publication":"2022","modification":"2026-05-28T06:25:16.081Z","creation":"2025-04-05T20:37:59.204Z"},"accession":"S-EPMC9289101","cross_references":{"pubmed":["35860583"],"doi":["10.3389/fonc.2022.920444"]}}