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Brassinosteroids cause cell cycle arrest and apoptosis of human breast cancer cells.

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Brassinosteroids (BRs) are plant hormones that appear to be ubiquitous in both lower and higher plants. Recently, we published the first evidence that some natural BRs induce cell growth inhibitory responses in several human cancer cell lines without affecting normal non-tumor cell growth (BJ

Mechanisms of natural brassinosteroid-induced apoptosis of prostate cancer cells.

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Brassinosteroids (BRs) are a group of polyhydroxylated sterol derivatives with important regulatory roles in various plant physiological processes. The aim of this study was to examine the mechanism of the antiproliferative activity of natural BRs 28-homocastasterone (28-homoCS) and

Activation of polyamine catabolic enzymes involved in diverse responses against epibrassinolide-induced apoptosis in LNCaP and DU145 prostate cancer cell lines.

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Epibrassinolide (EBR) is a biologically active compound of the brassinosteroids, steroid-derived plant growth regulator family. Generally, brassinosteroids are known for their cell expansion and cell division-promoting roles. Recently, EBR was shown as a potential apoptotic inducer in various cancer

3-Keto-22-epi-28-nor-cathasterone, a brassinosteroid-related metabolite from Cystoseira myrica.

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Bioassay-guided purification of an ethanolic extract of Cystoseira myrica against HEPG-2 (liver) and HCT116 (colon) human cancer cell lines led to the isolation of 3-keto-22-epi-28-nor-cathasterone, 1 and cholest-4-ene-3,6-dione, 2. This finding allowed us to report for the first time that a

Synthesis of novel aryl brassinosteroids through alkene cross-metathesis and preliminary biological study.

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A series of phenyl analogues of brassinosteroids was prepared via alkene cross-metathesis using commercially available styrenes and 24-nor-5α-chola-2,22-dien-6-one. All derivatives were successfully docked into the active site of BRI1 using AutoDock Vina. Plant growth promoting activity was measured

Biological Evaluation of a New Brassinosteroid: Antiproliferative Effects and Targeting Estrogen Receptor α Pathways.

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Brassinosteroids (BS), a class of plant-specific steroid hormones, are considered as new potential anticancer agents for the treatment of tumors of different origin, including hormone-dependent cancers. Effects of a synthetic brassinosteroid BS4

Anticancer and antiproliferative activity of natural brassinosteroids.

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Brassinosteroids (BRs) are steroid plant hormones that are essential for many plant growth and developmental processes, including cell expansion, vascular differentiation and stress responses. Up to now the inhibitory effects of BRs on cell division of mammalian cells are unknown. To determine basic

Molecular mechanisms of plant steroids and study of their interaction with nuclear receptors in prostate cancer cells.

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Plant hormone brassinosteroids (BRs) have multiple important functions in plants. They have also been found to exhibit anti-tumor, anti-angiogenic and anti-proliferative activity. The experimental part of this article describes the effects of BR biosynthetic precursors on prostate cancer cells. The

Maize host requirements for Ustilago maydis tumor induction.

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The biotrophic pathogen Ustilago maydis causes tumors by redirecting vegetative and floral development in maize (Zea mays L.). After fungal injection into immature tassels, tumors were found in all floral organs, with a progression of organ susceptibility that mirrors the sequential location of foci

Design, synthesis and biological activities of new brassinosteroid analogues with a phenyl group in the side chain.

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We have prepared and studied a series of new brassinosteroid derivatives with a p-substituted phenyl group in the side chain. To obtain the best comparison between molecular docking and biological activities both types of brassinosteroids were synthesized; 6-ketones, 10 examples, and B-lactones, 8

Brassinosteroids: synthesis and activity of some fluoro analogues.

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Three types of 5alpha-androstane and ergostane analogues of brassinolide, containing a fluorine atom in either the 3alpha or the 5alpha positions or in 3alpha and 5alpha positions, were prepared using standard operations (reaction of 3beta-alcohols with (diethylamino)sulfur trifluoride, cleavage of

Epibrassinolide-induced Autophagy Occurs in an Atg5-independent Manner Due to Endoplasmic Stress Induction in MEF Cells

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Epibrassinolide (EBR), a polyhydroxysteroid belongs to plant growth regulator family, brassinosteroids and has been shown to have a similar chemical structure to mammalian steroid hormones. Our findings indicated that EBR could trigger apoptosis in cancer cells via induction of endoplasmic reticulum

Polyphosphazene-based nanocarriers for the release of agrochemicals and potential anticancer drugs.

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The synthesis and characterisation of novel polyphosphazene nanocarriers, based on hydrophilic polyalkylene oxide Jeffamine M1000 and hydrophobic steroids with a glycinate linker for pH-controlled release of diosgenin and two brassinosteroids (DI31 and S7) with agrochemical and potential anticancer

Phosphorylation of ATG18a by BAK1 suppresses autophagy and attenuates plant resistance against necrotrophic pathogens

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Autophagy is critical for plant defense against necrotrophic pathogens, which causes serious yield loss on crops. However, the post-translational regulatory mechanisms of autophagy pathway in plant resistance against necrotrophs remain poorly understood. In this study, we report that phosphorylation

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