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Journal ArticleDOI

Antiproliferative Action of Xylopia aethiopica Fruit Extract on Human Cervical Cancer Cells

TLDR
Results indicate that XAFE could be a potential therapeutic agent against cancer since it inhibits cell proliferation, and induces apoptosis and cell cycle arrest in C‐33A cells.
Abstract
The anticancer potential of Xylopia aethiopica fruit extract (XAFE), and the mechanism of cell death it elicits, was investigated in various cell lines. Treatment with XAFE led to a dose-dependent growth inhibition in most cell lines, with selective cytotoxicity towards cancer cells and particularly the human cervical cancer cell line C-33A. In this study, apoptosis was confirmed by nuclear fragmentation and sub-G(0)/G(1) phase accumulation. The cell cycle was arrested at the G(2)/M phase with a decreased G(0)/G(1) population. A semi-quantitative gene expression study revealed dose-dependent up-regulation of p53 and p21 genes, and an increase in the Bax/Bcl-2 ratio. These results indicate that XAFE could be a potential therapeutic agent against cancer since it inhibits cell proliferation, and induces apoptosis and cell cycle arrest in C-33A cells.

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Potential of Central, Eastern and Western Africa Medicinal Plants for Cancer Therapy: Spotlight on Resistant Cells and Molecular Targets.

TL;DR: Plant extracts from CEWA and isolated compounds thereof exert cytotoxic effects by several modes of action including caspases activation, alteration of mitochondrial membrane potential (MMP), induction of reactive oxygen species (ROS) in cancer cells and inhibition of angiogenesis.
Journal ArticleDOI

Characterization of Keratin Microparticles from Feather Biomass with Potent Antioxidant and Anticancer Activities

TL;DR: In the present study chicken feathers were hydrolyzed by chemical treatment in alkaline conditions and the pH value of feather hydrolyzing solution was amended accordingly the iso-electric precipitation to reveal that the extracted keratin retained the most of protein backbone.
References
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Journal ArticleDOI

WAF1, a potential mediator of p53 tumor suppression

TL;DR: A gene is identified, named WAF1, whose induction was associated with wild-type but not mutant p53 gene expression in a human brain tumor cell line and that could be an important mediator of p53-dependent tumor growth suppression.
Journal ArticleDOI

The p21 Cdk-interacting protein Cip1 is a potent inhibitor of G1 cyclin-dependent kinases

TL;DR: In this article, an improved two-hybrid system was employed to isolate human genes encoding Cdk-interacting proteins (Cips) and found that CIP1 is a potent, tight-binding inhibitor of Cdks and can inhibit the phosphorylation of Rb by cyclin A-Cdk2.
Journal ArticleDOI

On tyrosine and tryptophane determinations in proteins

TL;DR: In this article, the authors summarized research into the existing methods for the quantitative determination of tyrosine and tryptophane in proteins, including the Folin-Looney method, which is based on reaction of a phosphotungstic phosphomolybdic acid in a phenol solution.
Journal ArticleDOI

Direct activation of Bax by p53 mediates mitochondrial membrane permeabilization and apoptosis.

TL;DR: It is proposed that when p53 accumulates in the cytosol, it can function analogously to the BH3-only subset of proapoptotic Bcl-2proteins to activate Bax and trigger apoptosis.
Journal ArticleDOI

Movement of Bax from the Cytosol to Mitochondria during Apoptosis

TL;DR: In cells undergoing apoptosis, an early, dramatic change occurs in the intracellular localization of Bax, and this redistribution of soluble Bax to organelle-bound GFP–Bax appears important for Bx to promote cell death.
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