Unknown,Transcriptomics,Genomics,Proteomics

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Effects of exercise on gene expression level in human NK Cells

ABSTRACT: We tested the hypothesis on the mechanisms responsible for the early control of NK cell function by identifying a discrete set of genes in circulating NK cells that were altered by exercise. Exercise leads to a rapid change in the profile of gene expression in NK cells. Twelve healthy men (20-29 yr old) performed 10 2-min bouts of cycle ergometer exercise interspersed with 1-min rest at a constant work equivalent to about 77% of VO2max. A baseline blood sample was taken before the and immediately after the exercise. NK cells were isolated from PBMC using a negative magnetic cell separation methods (Miltenyi Biotec Kit #130-092-657 and the autoMACSM-BM-. Pro Separator). Total RNA was extracted using TRIzolM-BM-.. For this study we used Affymetrix plus 2 (total of 24 chips).

ORGANISM(S): Homo sapiens

SUBMITTER: Shlomit Radom-Aizik

PROVIDER: E-GEOD-41914 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Impact of brief exercise on peripheral blood NK cell gene and microRNA expression in young adults.

Radom-Aizik Shlomit S Zaldivar Frank F Haddad Fadia F Cooper Dan M DM

Journal of applied physiology (Bethesda, Md. : 1985) 20130103 5

Natural killers (NK) cells are unique innate immune cells that increase up to fivefold in the circulating blood with brief exercise and are known to play a key role in first-response defense against pathogens and cancer immunosurveillance. Whether exercise alters NK cell gene and microRNA (miRNA) expression is not known. Thirteen healthy men (20-29 yr old) performed ten 2-min bouts of cycle ergometer exercise at a constant work equivalent to an average of 77% of maximum O2 consumption interspers ...[more]

PMID: 23288554

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Project description:The Ptf1a gene has essential functions during several stages of pancreas development. It is expressed in the naM-CM-/ve endoderm and required pancreas cell fate specification; it is also required later in the differentiation and maintenance of acinar cells. To identify the regulatory genetic program downstream of Ptf1a required for early pancreatic fate acquisition, we used microarrays to perform a comprehensive gene expression analysis of Ptf1a overexpressing endodermal tissue at NF32 and NF36. The results revealed an up-regulation on 1142 probe sets over 2-fold. Additional analyses, by in situ hybridizations, identified 9 genes that were endodermally expressed after the onset of endogenous Ptf1a; STXBP1, putative transmembrane protein TA-2, C25H, IGFBP1, IRF1, HALPN3, Hey1, sestrin 1, syndecan-4. These results provide insight into the regulatory network activated by Ptf1a during early pancreas development. In order to identify downstream targets of Ptf1a, two microarrays were performed at different time-points. The two microarrays compared control pancreatic tissue (GFP) and pancreatic tissue over-expressing Ptf1a (Ptf1a+GFP). The first microarray was performed at NF32, hence renamed MA32, 8 hours after the initial expression of endogenous Ptf1a. A second microarray was performed at NF36 (MA36), 8 hours after the first one. Ptf1a+gfp mRNA or gfp mRNA alone was injected into the two dorso-vegetal blastomeres of eight-cell embryos, targeting the anterior endoderm, and 40/48 hours later the anterior endoderm was dissected out. Approximated 15 endoderm explants were pooled for each RNA preparation, and both control and experimental samples were collected from the same batch of embryos; this was done in triplicate at NF32 and in quadruplicate at NF36 (Fig. 1A). For the NF32 microarray, we used the Affymetrix 3M-bM-^@M-^Y Xenopus laevis Genome 2.0 GeneChip, whereas for the NF36 microarray we used the Affymetrix 3M-bM-^@M-^Y Xenopus laevis Genome 1.0 GeneChip; the NF36 microarray was performed prior to the release of the 2.0 GeneChip.

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Dataset Information

Effects of exercise on gene expression level in human NK Cells

Publications

Impact of brief exercise on peripheral blood NK cell gene and microRNA expression in young adults.

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