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Verbesina encelioides-induced cytotoxicity and mitochondria-mediated apoptosis in human colon cancer cells through ROS generation

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Abstract

Verbesina encelioides is known to possess antioxidant, antimicrobial, antidiabetic, and antiviral activities. However, anticancer activity of V. encelioides plant on human colon cancer has not been explored so far. Herein, anticancer potential of ethanolic extract (VE) and aqueous extract (VA) of V. encelioides against human colon cancer cell line (HCT-116) was evaluated. Cell viability assays, morphological analysis, oxidative stress markers (lipid peroxidation (LPO) and glutathione (GSH)), reactive oxygen species (ROS) generation, mitochondrial membrane potential (MMP), and apoptotic marker genes were studied. VE exhibited a higher cytotoxic effect related to VA at tested concentrations as observed by 3-(4,5-dimethylthiazol-2-yl)-2-5-diphenyltetrazolium bromide) (MTT), neutral red uptake (NRU) assays, and morphological analysis. The obtained results showed that VE induced LPO level, GSH depletion, ROS production, and depletion of the mitochondrial membrane potential. A mechanistic study has confirmed that VE induces apoptosis in HCT-116 cells by upregulating pro-apoptotic genes (p53, caspase-3 and − 9, and Bax) expression and downregulating Bcl-2 (antiapoptotic gene). Overall, these results clearly exhibited that VE has anticancer potential against HCT-116 cells through oxidative stress, ROS generation, and mitochondrial-mediated apoptosis. The findings of this study suggest that V. encelioides could be a source for the development of new anticancer agents.

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Abbreviations

HCT-116:

Human colon cancer cell line

LPO:

lipid peroxidation

GSH:

glutathione

ROS:

reactive oxygen species

MMP:

mitochondrial membrane potential

MTT:

3-(4,5-dimethylthiazol-2-yl)-2-5-diphenyltetrazolium bromide)

NRU:

neutral red uptake

DMEM:

Dulbecco’s modified eagle’s medium

DMSO:

dimethyl sulfoxide

TBA:

thiobarbituric acid

DTNB:

5,5’-dithio-bis(2-nitrobenzoic acid)

DCF-DA:

2’,7’-dichrolofluorescin diacetate

Rh-123:

Rhodamine-123

ATCC:

American Type Culture Collection

FBS:

fetal bovine serum

SDS:

sodium dodecyl sulfate

RT-qPCR:

reverse transcription quantitative polymerase chain reaction

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Acknowledgements

This research project was supported by a grant from the “Research Centre of the Female Scientific and Medical Colleges”, Deanship of Scientific Research, King Saud University.

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Correspondence to Nida Nayyar Farshori.

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This paper does not contain any studies with human or animals.

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Farshori, N.N. Verbesina encelioides-induced cytotoxicity and mitochondria-mediated apoptosis in human colon cancer cells through ROS generation. Biologia 76, 2711–2720 (2021). https://doi.org/10.1007/s11756-021-00781-2

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  • DOI: https://doi.org/10.1007/s11756-021-00781-2

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