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MRNA profiles of bone marrow and splenic hematopoietic stem cells after 5-FU challenge

ABSTRACT: mRNA profiles of bone marrow and splenic hematopoietic stem cells after 5-FU challenge

PROVIDER: PRJNA1043070 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26887900.fastq.gz	Fastqsanger.gz
	SRR26887901.fastq.gz	Fastqsanger.gz
	SRR26887902.fastq.gz	Fastqsanger.gz
	SRR26887903.fastq.gz	Fastqsanger.gz
	SRR26887904.fastq.gz	Fastqsanger.gz

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mRNA profiles of bone marrow and splenic hematopoietic stem cells after 5-FU challenge

Project description:Under stress hematopoiesis, previous studies have suggested the migration of hematopoietic stem cells (HSCs) from bone marrow (BM) to extramedullary sites such as spleen. However, there is little direct evidence of HSC migration from BM to spleen. Here, we induced myeloablation via 5-fluorouracil (5-FU) and showed the direct evidence of HSC migration from BM to spleen during hematopoietic regeneration via a photoconvertible fluorophore. We found that during hematopoietic regeneration, there were mechanistic differences for HSC migration during early (day 3 to 8) and late phase (day 11 to 14). During steady-state, HSCs preferentially migrated to BM rather than spleen, but during the early phase HSC migration to spleen predominated. Indeed, in the early phase, HSC mobilization from BM was induced in G-CSF-dependent manners, while HSCs in the late phase gained significantly enhanced cell-autonomous motility, which was independent of chemotaxis. Collectively, HSC migration was dynamically changed during hematopoietic regeneration.

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miRNA profiling data of mouse bone marrow samples four days post 5-FU treatment versus untreated controls

Project description:To identify miRNAs that regulate hematopoietic response after 5-FU-induced injury, we analyzed miRNA expression changes in bone marrow cells from mice with or without 5-FU treatment. Global miRNA expression profiling of the 5-FU and untreated cohorts showed that 92 miRNAs (among 168 that passed the detection threshold) were significantly upregulated or downregulated, with false discovery rates < 5%. Female 6wk-old C57Bl6/J mice were left untreated or given a single dose of 5-FU (150mg/kg). Four days post treatment whole bone marrow was isolated from each animal (n=3 for treated and n=5 for untreated controls) and lysed for total RNA using Trizol (Invitrogen). Samples were profiled for miRNA expression using a bead-based profiling methodology (Lu et al., 2008). Profiling data were normalized assuming equal total miRNA expression across samples. Differential miRNA expression was analyzed by studentM-bM-^@M-^Ys t-test and then calculated for false discovery rate using the Benjamini and Hochberg method.

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