Evidence map›Paper›PMID 41915119›Full record

ArticleMolecular biology reports2026

Synergistic anticancer effects of thymoquinone and curcumin via ROS-mediated mitochondrial apoptosis in HeLa cells.

Ummai Habiba, Najmul Islam

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Article in Molecular biology reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

2 authors.

Ummai HabibaDepartment of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh, Uttar Pradesh, India.
Najmul IslamDepartment of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh, Uttar Pradesh, India. nislam.bh@amu.ac.in.

Funding

Department of Biotechnology (DBT), Ministry of Science and Technology, Government of India, New Delhi DBTHRDPMU/JRF/BET-23/I/2023-24/85
6 · The paper itself

Abstract

backgroundCervical cancer continues to pose a significant global health issue, often exacerbated by challenges such as chemoresistance and toxicity. Phytochemicals such as thymoquinone and curcumin exhibit promising multi-targeted anticancer properties. PURPOSE: This study investigated the synergistic cytotoxic and pro-apoptotic effects of Thymoquinone (TQ) and Curcumin (CUR) on HeLa cells and elucidated the underlying mechanisms.

methodsHeLa cells were treated with TQ (0–100 µM), CUR at 30%, 50%, and 70% inhibitory concentrations (IC₃₀, IC₅₀, IC₇₀), and fixed-ratio combinations for 24, 48, 72, and 96. Cytotoxicity was measured using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, and synergy was assessed using the Chou–Talalay method. Morphological alterations and apoptotic features were examined by phase-contrast microscopy and acridine orange/ethidium bromide (AO/EtBr) dual staining. Apoptotic signalling was evaluated through reactive oxygen species (ROS) generation, mitochondrial membrane potential (ΔΨm), and expression of caspase-9 and caspase-3.

resultsTQ and CUR reduced HeLa cell viability dose-dependently. Combination treatment showed time-dependent interaction, with additive effects at 24 h, antagonist-to-additive effects at 48 h, and synergistic cytotoxicity at longer exposures. Synergy emerged at 72 h and peaked at 96 h, particularly at lower inhibitory concentrations (CI₃₀ = 0.12). The combination induced apoptotic features, including nuclear condensation, membrane blebbing, mitochondrial depolarization, elevated ROS levels, and caspase-9 and caspase-3 activation, indicating intrinsic, caspase-dependent apoptosis.

conclusionTQ and CUR synergistically induce apoptosis in HeLa cells through ROS-mediated mitochondrial dysfunction and caspase activation, highlighting their potential as a phytochemical-based adjunct strategy for cervical cancer management. Hence, further in vivo studies are warranted.

Indexed as

ApoptosisBenzoquinonesCurcuminMitochondriaReactive Oxygen SpeciesAntineoplastic AgentsCaspase 3Caspase 9Cell SurvivalDrug SynergismFemaleHeLa CellsHumansMembrane Potential, MitochondrialUterine Cervical NeoplasmsAntineoplastic AgentsBenzoquinonesCaspase 3Caspase 9CurcuminReactive Oxygen SpeciesthymoquinoneCaspase dependentCervical cancerCurcuminPhytochemicalsSynergyThymoquinone

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.