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ScRNA-seq analysis of tumor infiltrating lymphocytes in PTENα-expressing tumors

ABSTRACT: scRNA-seq analysis of tumor infiltrating lymphocytes in PTENα-expressing tumors

PROVIDER: PRJNA738151 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR14820616.fastq.gz	Fastqsanger.gz
	SRR14820617.fastq.gz	Fastqsanger.gz
	SRR14820618.fastq.gz	Fastqsanger.gz
	SRR14820619.fastq.gz	Fastqsanger.gz
	SRR14820620.fastq.gz	Fastqsanger.gz

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scRNA-seq analysis of tumor infiltrating lymphocytes in PTENα-expressing tumors

Project description:As a tumor suppressor, PTEN is frequently mutated in human cancers and PTEN mutants promote tumor progression and metastasis. PTEN mutations have been implicated in immune regulation, but the underlying mechanism is largely unknown. We report that PTENα, the isoform of PTEN, remains active in cancer bearing stop-gained PTEN mutations. Through counteraction of CD8+ T cell-mediated cytotoxicity, presence of PTENα leads to T cell dysfunction and accelerates immune-resistant cancer progression. Clinical analysis further uncovers that PTENα-active mutations suppress host immune responses and result in poor prognosis in cancer as relative to PTENα-inactive mutations. Furthermore, germline deletion of Ptenα in mice increases cell susceptibility to immune attack through augmenting stress granule formation and limiting synthesis of peroxidases, leading to massive oxidative cell death and severe inflammatory damage. We propose that PTENα protects tumor from T cell killing and thus PTENα is a potential target in antitumor immunotherapy.

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