Project description:Brown rice-specific bioactive substance, γ-oryzanol ameliorates fuel dysmetaborism, but it is hardly absorbed form the intestine. To increase the efficiency of its absorption, we therefore challenged to encapsulate γ-oryzanol in polymer poly (DL-lactide-co-glycolide) (PLGA) nanoparticles. We assessed the metabolically-beneficial impact of PLGA-encapusulated γ-oryzanol on fuel dyshomeostasis in genetically obese-diabetic ob/ob mice.
Project description:Transcriptional profiling of gamma-oryzanol-treated (24h) differentiating equine satellite cells (3rd day of differentiation) compared to control GO-untreated cells. Goal was to determine the effects of gamma-oryzanol influence on gene expression in equine satellite cells during in vitro myogenesis
Project description:Transcriptional profiling of gamma-oryzanol-treated (24h) differentiating equine satellite cells (3rd day of differentiation) compared to control GO-untreated cells. Goal was to determine the effects of gamma-oryzanol influence on gene expression in equine satellite cells during in vitro myogenesis Two-condition experiment, GO-treated (24h) differentiating equine satellite cells (3rd day of differentiation) vs. differentiating equine satellite cells without GO treatment (control). Biological replicates: 4 reps of examined condition (Cy5), 4 control replicates (Cy3)
Project description:An Infinium microarray platform (HorvathMammalMethylChip320) was used to generate DNA methylation data from n=48 liver samples from mice. Treatment: encapsulated rapamycin treated or control mice
Project description:INTRODUCTION: Amphiphilic copolymer nanoparticle-encapsulated multi-target chemotherapeutic drugs have attracted considerable attention due to their favorable drug efficiency and potential application prospect. Studies have shown that an amphiphilic copolymer, methoxypoly(ethylene glycol)-poly(lactide-co-glycolide) modified with e-polylysine, and encapsulated with hydrophilic doxorubicin, hydrophobic paclitaxel and survivin siRNA profoundly improved the therapeutic effect both in vitro and in vivo.</br>OBJECTIVES: To investigate how MCF-7 cells would response to the exposure of these nanoparticles over with time and assess the biological effects of these nanoparticles and their encapsulated drugs in a holistic manner.</br>METHODS: MCF-7 cells were treated with PBS, nanocarrier and three encapsulated drugs, respectively. Metabolic alterations associated with nano-drugs exposure were investigated by performing untargeted NMR metabolomics with combination of targeted fatty acids analysis by GC-MS on cell extracts. Altered metabolic pathways were further validated by qRT-PCR approach.</br>RESULTS: Copolymers showed great biocompatibility with cells as it induced transit metabolic disruptions without affecting cell survival rate. The rapid release of encapsulated doxorubicin resulted in inhibition of glycolysis and DNA synthesis, active proteolysis; these metabolic alternations were recovered after 10 h exposure. However, the combination use of multiple drugs consistently induced cell cycle arrest and apoptosis evidenced by reduction in glycolysis, active proteolysis, stimulated O-GlcNAcylation, reduced the PC:GPC ratio and fatty acids accumulation. Prolonged exposure to encapsulated-multiple-drugs also induced oxidative stress to cells.</br>CONCLUSION: These findings provide important insight into the biological effects of nanoparticles and their encapsulated drugs while demonstrate that metabolomics is a powerful approach to evaluate the biological effects of nano-drugs.
Project description:We have performed measured levels of metabolites involved in gluconeogenesis in liver. Over-night fasted ob ob mice that were injected with vehicle or FGF1 for 2h were used for the analysis.
