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High Mobility Group protein HMGB2 is a Critical Regulator of Plasmodium Oocyst Development

ABSTRACT: Two mice per group were infected with one million purified schizonts from the WT and two clones (B3 and D1) of the pyhmgb2 KO lines. Parasitemia reached 10 to 20 % and equivalent gametocytemia total RNA was extracted from the WT and the B3 and D1 clones of the KO parasite lines using the Trizol method on saponin lysed of parasites. Keywords: gene expression

ORGANISM(S): Plasmodium yoelii

PROVIDER: GSE9952 | GEO | 2008/04/19

SECONDARY ACCESSION(S): PRJNA103957

REPOSITORIES: GEO

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High Mobility Group protein HMGB2 is a Critical Regulator of Plasmodium Oocyst Development

Project description:Two mice per group were infected with one million purified schizonts from the WT and two clones (B3 and D1) of the pyhmgb2 KO lines. Parasitemia reached 10 to 20 % and equivalent gametocytemia total RNA was extracted from the WT and the B3 and D1 clones of the KO parasite lines using the Trizol method on saponin lysed of parasites. Four samples analysed including dye-swap

2008-04-19 | E-GEOD-9952 | biostudies-arrayexpress

Spatiotemporal expression of HMGB2 regulates cell proliferation and hepatocyte size during liver regeneration

Project description:Liver regeneration is an extraordinarily complex process involving a variety of factors; however, the role of chromatin protein in hepatocyte proliferation is largely unknown. In this study, we investigated the functional role of high-mobility group box 2 (HMGB2), a chromatin protein in liver regeneration using wild-type and HMGB2-knockout (KO) mice. Liver tissues were sampled after 70% partial hepatectomy (PHx), and analyzed by immunohistochemistry using various markers of cell proliferation, including Ki-67, PCNA, cyclin D1, cyclin B1, EdU and pH3S10. In WT mice, hepatocyte proliferation was strongly correlated with the spatiotemporal expression of HMGB2; however, cell proliferation was significantly delayed in hepatocytes of HMGB2-KO mice. Quantitative PCR demonstrated that cyclin D1 and cyclin B1 mRNAs were significantly decreased in HMGB2-KO mice livers. Interestingly, hepatocyte size was significantly larger in HMGB2-KO mice at 36-72 h after PHx, and these results suggest that hepatocyte hypertrophy appeared in parallel with delayed cell proliferation. In vitro experiments demonstrated that cell proliferation was significantly decreased in HMGB2-KO cells. A significant delay in cell proliferation was also found in HMGB2-siRNA transfected cells. In summary, spatiotemporal expression of HMGB2 is important for regulation of hepatocyte proliferation and cell size during liver regeneration.

2022-04-03 | GSE199944 | GEO

HMGB2 is important for liver regeneration through transient accumulation of lipid droplets in hepatocytes

Project description:Liver regeneration is an well orchestrated compensatory process that regulated by multiple factors. We recently reported the importance of chromatin protein, a high-mobility group box 2 (HMGB2) in mouse liver regeneration, however, it’s molecular mechanism is not yet understood. In this study, we aimed to study how HMGB2 regulates hepatocyte proliferation during liver regeneration. Wild-type (WT) and HMGB2-knockout (KO) mice were 70% partial hepatectomized (PHx), and liver tissues were analyzed by microarray, immunohistochemistry, qPCR and western blotting. In vivo experimental findings were confirmed by in vitro experiments using HMGB2 gene knockdown in combination with de novo lipogenesis model. In WT mouse, HMGB2-positive hepatocytes were co-localized with cell proliferation markers, whereas, hepatocyte proliferation was significantly decreased in HMGB2-KO mice. Oil red-O staining detected the transient accumulation of lipid droplets at 12-24 h in WT mouse livers, however, decreased amount of lipid droplets were found in HMGB2-KO mouse livers, and it was prolonged until 36 h. Microarray, immunohistochemistry and qPCR results were demonstrated that lipid metabolism related genes were significantly decreased in HMGB2-KO mouse livers. In vitro experiments demonstrated that decreased lipid droplets in HMGB2-knockdown cells correlated with decreased cell proliferation activity. HMGB2 is involved in the regulation of liver regeneration through transient accumulation of lipid droplets in hepatocytes.

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Differential response to Lenalidomide from WT and RUNX1-KO MDS-L del(5q) cells

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High mobility group protein HMGB2 is a critical regulator of plasmodium oocyst development.

Project description: Not available

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