Project description:To investigate the effects of ginsenosides-CNTs conjugtaes on total expression profile of MCF-7 breast cancer cells, we conjugated ginsenoides Rb1 and Rg1 with multi-walled carbon nanotubes in a 5:1 ratio. Objectives for this study included the identification of genes that were up or down-regulated at the transcriptional level in MCF-7 cells treated with ginsenoside-CNTs conjugates and compare it to the ginsenosides alone (Rb1 and Rg1)
Project description:MicroRNAs (miRNAs) are small non-coding RNAs that act as post-transcriptional gene modulators. Ginsenoside-Rg1, one of the active components of ginseng, has been confirmed by us as an angiogenesis inducer. Using miRNA microarray analysis, a total of 15 (including miR-214) and 3 miRNAs were found to be down- or up-regulated by Rg1 in human umbilical vein endothelial cells (HUVEC), respectively. Since miR-214 is closely related to endothelial nitric oxide synthase (eNOS) and hence angiogenesis; its expression was further validated by qRT-PCR. We also investigated the role of miR-214 on eNOS expression and in tubulogenesis of HUVEC by transfection of specific miRNA inhibitor or precursor. Our results suggested that Rg1 can down-regulate miR-214 expression in HUVEC, leading to an increase in eNOS expression which can promote angiogenesis. This result signifies a new understanding towards how a simple natural compound can affect physiological changes through modulation of miRNA expression. The study is used to investigate the role of miRNA-214 in Rg1-induced human endothelial cells.
Project description:MicroRNAs (miRNAs) are small non-coding RNAs that act as post-transcriptional gene modulators. Ginsenoside-Rg1, one of the active components of ginseng, has been confirmed by us as an angiogenesis inducer. Using miRNA microarray analysis, a total of 15 (including miR-214) and 3 miRNAs were found to be down- or up-regulated by Rg1 in human umbilical vein endothelial cells (HUVEC), respectively. Since miR-214 is closely related to endothelial nitric oxide synthase (eNOS) and hence angiogenesis; its expression was further validated by qRT-PCR. We also investigated the role of miR-214 on eNOS expression and in tubulogenesis of HUVEC by transfection of specific miRNA inhibitor or precursor. Our results suggested that Rg1 can down-regulate miR-214 expression in HUVEC, leading to an increase in eNOS expression which can promote angiogenesis. This result signifies a new understanding towards how a simple natural compound can affect physiological changes through modulation of miRNA expression.
Project description:In order to analyze the production of small RNA (sRNA) by Potato spindle tuber viroid- RG1 strain (PSTVd-RG1) upon infecting the plants, the tomato plants (Lycopersicum esculentum cv. Rutgers) were inoculated with the PSTVd-RG1. After 21-days of post inoculation, total RNA was extracted and subjected for deep-sequencing using Illumina MiSeq platform. The primers were trimmed and the 21- to 24-nt long small RNA species were filtered after quality check of the raw data.
Project description:We report that ancestral zinc-finger-domain transcriptional regulators, previously reported to control virulence/symbiosis, implement a cell cycle (SM-bM-^FM-^RG1) transcriptional switch. To unravel how this G1-phase transcriptional program is reinstated during a primitive cell cycle, we first defined G1-specific promoters in the model bacterium Caulobacter crescentus by comparative ChIP-Seq analysis. We then exploited one such promoter as genetic proxy, to identify two conserved developmental regulator paralogs, MucR1/2, that constitute a quadripartite and homeostatic regulatory module directing the switch from SM-bM-^FM-^RG1-phase transcription. Surprisingly, MucR orthologs that regulate virulence and symbiosis gene transcription in Brucella, Agrobacterium or Sinorhizobium support the G1 transcriptional switch in Caulobacter. Pan-genomic ChIP-Seq analyses in Sinorhizobium and Caulobacter show that this module targets orthologous genes. Thus, this ancestral bacterial lineage from which eukaryotic organelles descended may coordinate virulence/symbiosis with other cell cycle functions using a primordial transcription factor fold that is now primarily found in the eukaryotic domain of life. Examination of 5 transcripton factor binding in two different species
Project description:Ginsenoside Rg5 reveals proresolving functions in airway mucous cells through inhibition of ROS production and promoting anti-inflammation factors
Project description:Ginseng has been used for anti-stress agents, and its active ingredient, ginsenoside, has similar structure with estrogen. In this study, effects of red ginseng (RG) on gene expressions in immobilization (IMO) stressed mice brain was analyzed by system biology.