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Whole-transcriptome microarray analysis of Pseudomonas syringae pv. actinidiae (Psa) treated with Gunpowder green tea extract (EGCG 0.4 mg/ml)

ABSTRACT: Whole-transcriptome microarray analysis of Pseudomonas syringae pv. actinidiae (Psa) treated with Gunpowder green tea extract (EGCG 0.4 mg/ml)

PROVIDER: PRJNA573101 | ENA |

REPOSITORIES: ENA

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Whole-transcriptome microarray analysis of Pseudomonas syringae pv. actinidiae (Psa) treated with Gunpowder green tea extract (EGCG 0.4 mg/ml)

Project description:Purpose: Microarray technologies provide a unique opportunity to deeply investigate bacterial molecular responses to treatments. Pseudomonas syringae pv. actinidiae (Psa) is the causal agent of the bacterial canker of kiwifruit causing severe economic losses worldwide. At present, integrated control strategies include chemical treatments with copper-based products and preventive measures but the high virulence and fast spreading of the bacterium are hardly controlled by such measures, and especially copper use is questioned because of the possible appearance of copper resistant bacterial strains. The present project aims at the identification of Psa responses to green tea treatment (Gunpowder variety) at sub-lethal concentration (0.4 mg/ml). Methods: Psa cells were cultured in liquid KB (controls) or in KB supplemented with Gunpowder tea (Gunpowder-trateted) at 0.4 mg/ml EGCG for 24 h at 28°C. The microarray experiments on Gunpowder treated or untreated samples in biological triplicate resulted in 6 samples to be analyzed. Conclusions: This work identified important molecular mechanisms involved in Psa responses upon Gunpowder green tea treatment.

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Effect of Epigallocatechin gallate (EGCG), a green tea ployphenol, on estrogen regulated genes in breast cancer cell line MCF7.

Project description:Epigallocatechin gallate (EGCG), the major green tea polyphenol, has been a subject of global interest as a potential chemopreventive or chemotherapeutic supplement for breast cancer. While on one hand epidemiological studies suggest inverse correlation between green tea consumption and breast cancer risk, investigations using cell culture and animal models of breast carcinogenesis on the other hand have demonstrated antiproliferative, antitumor, anti-invasive and anti-metastatic properties of EGCG. Mechanism of how EGCG affects cell proliferation, apoptosis, migration and cell cycle by affecting the function of a wide range of molecular targets have also been studied. However, the question as to how EGCG impacts on estrogen responsive genes has not been addressed. This issue is of relevance to our notion of EGCG as a potential chemopreventive or chemotherapeutic agent against breast cancer, which is estrogen dependent in majority of the newly diagnosed cases. Here, using the estrogen receptor α (ERα) positive MCF-7 breast cancer cells as a model, we have examined the effect of EGCG on the estrogen regulated genes. MCF7 cells were treated with vehicle (Ethanol) or EGCG in the presence or absence of estrogen for 24hrs. Total RNA was extracted; Cy3 labeled cRNA was hybridized to Genotypic Technology designed Custom Human Whole Genome 8x60k Microarray (Agilent-027114). Median signal intensities were used for the analysis. After background subtraction (normexp) and normalization (quantile) differentially expressed genes were identified using linear models.

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Green Tea Polyphenol EGCG Attenuates MDSCs-mediated Immunosuppression through Canonical and Non-Canonical Pathways in a 4T1 Murine Breast Cancer Model

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