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Página 1 a partir de 25 resultados
Spectrum-effect relationship for anti-tumor activity of shikonins and shikonofurans in medicinal Zicao by UHPLC-MS/MS and chemometric approaches.
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Shikonin, shikonofuran and their derivatives are the main bioactive components of Zicao, a traditional Chinese medicine prepared with the dried roots of Lithospermum erythrorhizon, Arnebia euchroma or Arnebia guttata. To establish an efficient and sensitive method for studying material basis of
[Detection of the anti-cancer biological effect of naphthoquinone pigment-LIII].
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Naphthoquinone pigment-LIII, an extract from Arnebia euchroma, could apparently inhibit the proliferation of stomach cancer cell line and esophagus cancer cell line. At the effective concentration of 5 micrograms/ml, the mitotic index and growth curve declined without showing any damage to human
SYUNZ-16, a newly synthesized alkannin derivative, induces tumor cells apoptosis and suppresses tumor growth through inhibition of PKB/AKT kinase activity and blockade of AKT/FOXO signal pathway.
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Alkannin is the major bioactive compound of Arnebia euchroma roots, which is used in many therapeutic remedies in Chinese traditional medicine. SYUNZ-16 is a new derivative of alkannin. In this study, anticancer effects of SYUNZ-16 on human lung adenocarcinoma cell line GLC-82 and human
BRM270 targets cancer stem cells and augments chemo-sensitivity in cancer
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Over the past decade, a number of studies have demonstrated the resistance of cancer cells to conventional drugs and have recognized this as a major challenge in cancer therapy. While attempting to understand the underlying mechanisms of chemoresistance, several studies have suggested that the
Shikonin derivatives protect immune organs from damage and promote immune responses in vivo in tumour-bearing mice.
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Shikonin, a major component of Lithospermum erythrorhizon and Arnebia euchroma, exhibits antiinflammatory, immunomodulatory and antitumour activities. Although many recent studies have focused on the antitumour effects of shikonin, the exact mechanisms underlying its antitumour and immunomodulatory
Inhibition of growth and regulation of IGFs and VEGF in human prostate cancer cell lines by shikonin analogue 93/637 (SA).
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BACKGROUND
Insulin-like growth factors (IGFs) are important mitogens and are involved in normal and malignant cellular proliferation. IGFs and IGF binding proteins (IGFBPs) regulate the prostatic cell growth and reduction/blocking of IGFs has been suggested to be of therapeutic value in prostate
Deoxyshikonin isolated from Arnebia euchroma inhibits colorectal cancer by down-regulating the PI3K/Akt/mTOR pathway.
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Context: Shikonins, a series of natural occurring naphthoquinones extracted from Arnebia euchroma (Royle) Jonst. (Boraginaceae), have antitumor activities and low toxicity. Objective: To illuminate potential activity and mechanism of shikonins against colorectal cancer (CRC).
Advance in Anti-tumor Mechanisms of Shikonin, Alkannin and Their Derivatives.
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Shikonin, alkannin and their derivatives, the main ingredient of Lithospermum erythrorhizon and Arnebia euchroma (Royle) Johnst native to Inner Mongolian and Northwest of China respectively, hold promising potentials for antitumor effects via multiple-target mechanisms. This review will emphasize
Effect of l-phenylalanine on PAL activity and production of naphthoquinone pigments in suspension cultures of Arnebia euchroma (Royle) Johnst.
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The effects of l-phenylalanine (PHE) on cell growth and production of shikonin and its derivatives, acetylshikonin (ACS) and isobutyrylshikonin (IBS), in suspension cultures of Arnebia euchroma were examined. Supplementing media using PHE have been successfully utilized to enhance shikonin
Development and use of a gene promoter-based screen to identify novel inhibitors of cyclooxygenase-2 transcription.
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Cyclooxygenase-2 (COX-2) is a recognized target for cancer prevention and possibly treatment. To identify novel inhibitors of COX-2, we developed a high throughput reporter gene assay that utilizes a region of the human COX-2 promoter to drive luciferase expression. A total of 968 extracts from 266
Fabrication of silver nanoparticles using Arnebia hispidissima (Lehm.) A. DC. root extract and unravelling their potential biomedical applications.
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The present study reports the biosynthesis of silver nanoparticles using aqueous root extract of Arnebia hispidissima. They were prepared by adding 10 mL root extract in 90 mL silver nitrate (0.5 mM) solution and heating at 60 ± 2 °C for 12 min at pH 7.5. Characterization of the biosynthesized
Activation of CaMKKβ-AMPK-mTOR pathway is required for autophagy induction by β,β-dimethylacrylshikonin against lung adenocarcinoma cells.
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β,β-Dimethylacrylshikonin (DMAS), an active ingredient of Lithospermum erythrorhizon and Arnebia euchroma, possess anti-neoplasm properties. Recently, DMAS was reported to stimulate autophagy in lung adenocarcinoma cells. However, the mechanisms by which DMAS modulates autophagy. have not yet been
Effects of exogenous methyl jasmonate on the biosynthesis of shikonin derivatives in callus tissues of Arnebia euchroma.
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The shikonin derivatives, accumulated in the roots of Arnebia euchroma (Boraginaceae), showed antibacterial, anti-inflammatory, and anti-tumor activities. To explore their possible biosynthesis regulation mechanism, this paper investigated the effects of exogenous methyl jasmonate (MJ) on the
Alkannin induces cytotoxic autophagy and apoptosis by promoting ROS-mediated mitochondrial dysfunction and activation of JNK pathway
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Naphthoquinone derivatives and metabolites are widely dispersed molecules in nature. Alkannin, a natural naphthoquinone compound, induces excellent cytotoxicity in cancer cells. However, the detailed mechanism by which alkannin inhibits cancer cell survival remains unclear. In the present study, we
Characterization of the binding of shikonin to human immunoglobulin using scanning electron microscope, molecular modeling and multi-spectroscopic methods.
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Shikonin, one of the active components isolated from the root of Arnebia euchroma (Royle) Johnst, have anti-tumor, anti-bacterial and anti-inflammatory activities and has been used clinically in phlebitis and vascular purpura. In the present work, the interaction of human immunoglobulin (HIg) with
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