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RNA-sequencing analysis of the KYSE150 cells overexpressing caspase-8 mutants (M4, M6, M10, M13) or wild-type caspase-8

ABSTRACT: RNA-sequencing analysis of the KYSE150 cells overexpressing caspase-8 mutants (M4, M6, M10, M13) or wild-type caspase-8

PROVIDER: PRJNA816048 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR18324358_1.fastq.gz	Fastqsanger.gz
	SRR18324358_2.fastq.gz	Fastqsanger.gz
	SRR18324359_1.fastq.gz	Fastqsanger.gz
	SRR18324359_2.fastq.gz	Fastqsanger.gz
	SRR18324360_1.fastq.gz	Fastqsanger.gz

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RNA-sequencing analysis of the KYSE150 cells overexpressing caspase-8 mutants (M4, M6, M10, M13) or wild-type caspase-8

Project description:Purpose: Next-generation sequencing (NGS) has revolutionized systems-based analysis of cellular pathways. The goals of this study are using RNA sequencing analysis to test the effects of overexpressing caspase-8 mutants or wild-type caspase-8 on the mRNA of KYSE150 cells. Methods: KYSE150 cells were transfected with caspase-8 mutants or wild-type caspase-8 for 48 hours in 1640 medium plus 10% serum. Two independent replicates were plated, transfected in parallel for each caspase-8 mutants or wild-type caspase-8. Results: Log-fold changes of mRNAs between caspase-8 mutants and wild-type caspase-8 group were selected with a significance threshod of p<0.05. There are 3974 overlapping differentially expressed genes in the caspase-8 mutant cells compared to the wild-type caspase-8 cells. Conclusions: Our study determined the mRNA changes of caspase-8 mutant KYSE150 cells compared to the wild-type caspase-8 cells.

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Project description:The transcriptional regulator Mga of Streptococcus pyogenes (the group A streptococcus, GAS) is known to directly activate several virulence genes important for colonization and immune evasion during exponential growth. Transcriptome analysis comparing two mga-1 serotypes (M1 SF370, M6 JRS4) and one mga-2 serotype (M4 GA40634) against their isogenic mga-inactivated strains uncovered a broader Mga regulon profile containing both activated and repressed genes with predicted functions primarily related to the uptake and metabolism of sugars. Although the divergent M1 and M4 Mga profiles were similar in size and content, the M6 JRS4 strain was clearly distinct, even from other M6 strains. Real-time RT-PCR and northern blot analysis validated our microarray results and confirmed that established core Mga regulon genes directly activated by Mga (emm, scpA, sof, fba) exhibited the highest activation levels across all strains tested. A novel ORF (Spy2036) encoding a cytosolic hypothetical protein was highly activated in all three serotypes and was called gene regulated by Mga or grm. Mga was shown to bind directly to Pgrm, which overlaps the Mga-regulated Psof in OF+ strains, suggesting that grm is part of the core Mga regulon and is able to activate two divergently transcribed genes from a single site in a class II background. Both class and serotype specific Mga-regulated genes, such as speB, were apparent. In fact, Mga activated speB as long as it was expressed in the wild type strain, although direct binding of Mga to the PspeB promoter could not be demonstrated. Thus, Mga is able to both directly and indirectly regulate genes shown to be important for virulence and the metabolic homeostasis of GAS. Keywords: Wild-type vs Mga-

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