Food and medicinal plants from Nigeria with anti-Helicobacter pylori activities induce apoptosis in colon and gastric cancer cell lines
DOI:
https://doi.org/10.31989/ffhd.v13i7.1105Abstract
Background: Food and medicinal plants are used traditionally in Nigeria to treat gastrointestinal (GI) disorders such as gastritis, peptic ulcer disease and GI-related cancers. We have previously reported that specific extracts of Nigerian food and medicinal plants inhibited the growth of Helicobacter pylori, a bacterium known to cause peptic ulcer disease, as well as gastric and colon cancer.
Objective: To determine the effects of three food plants, namely Anogeissus leiocarpus (DC.) Guill. & Perr. (African birch, Combretaceae), Terminalia glaucescens Planch ex Benth. (Nigerian chewing sticks, Combretaceae) and Dillenia indica L. (Elephant apple, Dilleniaceae) used in Nigeria for the treatment of GI disorders and cancer in six colon and gastric cancer cell lines, and two non-cancerous cell lines.
Methods: Cancer cells were grown in appropriate media and CellTiter-Glo® 2.0 and ApoTox-Glo™ Triplex assays were used to measure cell growth and apoptosis in SW480, SW620, HCT116, Caco2 cell lines, as well as AGS and NCI-N87 gastric cancer cells. Caspase-Glo® 3/7, and Caspase-Glo® 8 were used to determine caspase activities and apoptosis. Gene expression was measured using quantitative PCR.
Results: The methanol extract of A. leiocarpus roots inhibited the growth of HCT-116, SW480 and SW620 colon cancer cells (IC50 of 15.8, 10.0, and 20.8 µg/mL, respectively), but weakly active in the AGS and NCI-N87 cells (IC50 77.0 and >100 µg/mL respectively). The T. glaucescens extract was weakly active in HCT-116 cells (IC50 64.9 µg/ml) and AGS cells (52.2 µg/ml). The D. indica extract was active in SW480 (IC50 15.8 µg/mL), and weakly active in Caco2 (IC50 35.2 µg/mL) and HCT-116 (IC50 53.2 µg/mL). In HCT-116 cells, A. leiocarpus root extract and its aqueous partition increased caspase 8 activity, as well as mRNA expression of p53, while expression of Bcl-2 and HDAC1 mRNA was reduced. Bioassay guided fractionation of the aqueous partition led to the isolation and identification of the known compound methyl gallate.
Conclusions: These data suggest that the Nigerian food plants with anti-Helicobacter pylori activities increase the expression of the tumor suppressor p53 and inhibit HDAC1, thereby inducing apoptosis in HCT-116 colon cancer cells.
Running Title: Inhibitory Effects of Nigerian food plants on GIT Cancers
Keywords: African birch, AGS, Apoptosis, Anogeissus leiocarpus, Dillenia indica, Elephant apple, Terminalia glaucescens, Nigerian chewing sticks, HCT-116, SW480, SW620
Downloads
Published
Issue
Section
License
Any manuscripts or substantial parts of it, submitted to the journal must not be under consideration by or previously published in any other journal or citable form. Authors are required to ensure that no material submitted as part of a manuscript infringes existing copyrights or the rights of a third party. In submitting one's article in any form, the author has assigned the FFC publishing rights and has agreed to an automatic transfer of the copyright to the publisher. This is so that the FFC may create print option journals, for example, at the FFC’s discretion. If the author wishes to distribute their works by means outside of the FFC, for example within their community, they will have to place a request.
Correspondence concerning articles published in Functional Foods in Health and Disease is encouraged. While derivative works (adaptations, extensions on the current work, etc.) are allowed, distribution of the modified material is not allowed without permission from the FFC.