Project description:Hematopoietic stem cell (HSC) is under dynamic controlled in the bone marrow to differentiate into cells of all lineages that constitute the blood. The bone marrow niches form a specific microenvironment to maintain and regulate HSC. However, the mechanisms that the effect of cytokines from blood on HSC function still remain largely unknown. Leukocyte chemotactic factor 2 (LECT2), a liver-derived cytokine, is involved in many immune dysfunctions, such as sepsis, cancer and diabetes. Here we showed that LECT2 affected the gene expression of bone marrow cells in mice. Especially, we found that LECT2 treatment for 3 and 5 days led to the down-regulation of cytokines such as, TNF, IL-6, IL-1β, CXCL10, CCL4, CCL3 et al. Moreover, the functions and mechanisms for LECT2 regulated HSC in bone marrow is still needed further investigation.
Project description:ATAC-seq profiling of Nfat5 KO and wild type macrophages derived from bone marrow (primary cells), treated or not with Lipopolysaccharide (LPS).
Project description:We analyzed the effect of Calr deficiency on Mac1 and Gr1 positive bone marrow cells using hematopoietic cell specific Calr knockout (Mx-cre;Calrf/-) mice and control (Mx-cre;Calr+/+) mice.
Project description:A transcriptome study in mouse hematopoietic stem cells was performed using a sensitive SAGE method, in an attempt to detect medium and low abundant transcripts expressed in these cells. Among a total of 31,380 unique transcript, 17,326 (55%) known genes were detected, 14,054 (45%) low-copy transcripts that have no matches to currently known genes. 3,899 (23%) were alternatively spliced transcripts of the known genes and 3,754 (22%) represent anti-sense transcripts from known genes. Mouse hematopoietic stem cells were purified from bone marrow cells using negative and positive selection with a Magnetic-Activated Cell Sorter (MACS). total RNA and mRNA were purified from the purified cells using Trizol reagent and magnetic oligo dT beads. Double strand cDNAs were synthesized using a cDNA synthesis kit and anchored oligo dT primers. After NlaIII digestion, 3’ cDNAs were isolated and amplified through 16-cycle PCR. SAGE tags were released from the 3’ cDNA after linker ligation. Ditags were formed, concatemerized and cloned into a pZERO vector. Sequencing reactions were performed with the ET sequencing terminator kit. Sequences were collected using a Megabase 1000 sequencer. SAGE tag sequences were extracted using SAGE 2000 software.