Project description:ChIP-seq was applied for identifying the deposition of H3K4me2 on genome of UV-treated C. elegans. C.elegans larvae are sensitive to UV treatment, and it may due to the deposition of various histone modification during DNA damage response (DDR). In our study, we identified one of the histone marks, H3K4me2, as a positive regulator of DDR related transcription. This ChIP-seq experiment was used to identify the genes that have H3K4me2 deposition.
Project description:We utilized high-throughput RNA-seq to uncover the intermediate-sized noncoding RNAs invovled in UV-DNA Damage Responses in C. elegans. 450 novel transfrags were discovered, some of which show dramatic expression change between the UV irradiation and control. This study should lead to a better understanding of the role of is-ncRNAs invovled in UV-DDR. Examination of intermediate-sized transcripts (70-500nt) in L4 larvae of C. elegans strains, including wild-type (N2), UV-irradiated (N2-UV100J/m2) and NER-deficient mutant (xpa-1) strains.
Project description:UV-induced CPDs were mapped in primary skin melanocytes or normal human skin fibroblasts following either UVC or UVB irradiation and in isolated human genomic DNA (naked DNA control) that was UVB or UVC irradiated. CPDs were mapped across the human genome using the CPD-capture-seq method and the resulting libraries were captured for ~4000 genomic regions of interest (~3 Mbp) of the human genome by the company Rapid Genomics prior to Illumina sequencing
Project description:The ability of macrophages to respond to chemoattractants and inflammatory signals is important for their migration to sites of inflammation and immune activity and for host responses to infection. Macrophages differentiated from the bone marrow of UV-irradiated mice, even after activation with LPS, migrated inefficiently towards CSF-1 and CCL2. When bone marrow cells were harvested from UV-irradiated mice, and transplanted into naïve mice, the recipient mice (UV-chimeric) had reduced accumulation of elicited macrophages in the peritoneal cavity in response to inflammatory thioglycollate or alum. Macrophages differentiating from the bone marrow of UV-chimeric mice also had an inherent reduced ability to migrate towards chemoattractants in vitro, even after LPS activation. Microarray analysis identified reduced reticulon-1 mRNA in macrophages differentiated from the bone marrow of UV-chimeric mice. By using an anti-reticulon-1 antibody, a role for reticulon-1 in macrophage migration was confirmed. The proposal that reduced reticulon-1 is responsible for the poor inherent ability of macrophages to respond to chemokine gradients was supported by Western blotting. In summary, skin exposure to erythemal UV radiation can modulate macrophage progenitors in the bone marrow such that the properties of their differentiated progeny respond inefficiently to signals to accumulate at sites of inflammation and immunity.