Abstract 860
Background
Breast cancer is a major public health problem among women. The use of phytoestrogens like Resveratrol (RSV) has been emerged as a promising chemopreventive and chemotherapeutic agent against breast cancer. However, its effect is reported to be variable according to the administered dose. So this study investigated the underlying mechanisms to the dual action of RSV on estrogen expressing type of breast carcinoma cells (MCF-7).
Methods
MCF-7 cells treated with different low and high doses of RSV and the consequent cytotoxicity, cell cycle, oxidative, angiogenic and inflammatory responses of the cells were evaluated. The autophagic behavior of MCF-7 cells was assessed by RSV combination with autophagic inhibitor (cloroquine). The effect of the combination on cell survival, autophaghic markers expression along with acridine orange staining and cell apoptosis was determined.
Results
Compared to the higher concentration, low dose of RSV (10 µg/ml) exhibited significant anti-survival effect accompanied with cell accumulation at G0/G1phase, higher MDA and VEGF secretion. Concerning the higher doses of RSV (30 and 50 µg/ml), more cells accumulated at S and G2/M phases, and significantly higher levels of GSH, COX-2, PGE2 and nitrate secretion were observed. Autophagic inhibition of RSV exhibited significant acidic lysosomal staining, anti-survival and pro-apoptotic effects on breast carcinoma cells. The combination of low RSV concentration (10 µg/ml) with autophagic inhibitor caused significant decrease in Beclin-1, LC3-B, BCl-2 and MCl-1 expressions, while higher doses of RSV (30 and 50 µg/ml) combination induced Beclin-1, BCl-2 and MCl-1 but reduced LC3-B expressions compared with the single treatment of RSV.
Conclusions
The cytotoxic effect of RSV depends on the autophagic response of breast carcinoma cells in relation to the applied dose.
Clinical trial identification
Editorial acknowledgement
Legal entity responsible for the study
The authors.
Funding
Has not received any funding.
Disclosure
All authors have declared no conflicts of interest.
Resources from the same session
4294 - The Patient Voice: An Irish Survey of Nutrition Attitudes & Access to Dietetic Care Throughout the Cancer Journey
Presenter: Erin Stella Sullivan
Session: Poster Display session 1
Resources:
Abstract
1925 - Homcology: home chemotherapy delivery in a simultaneous care project for frail advanced cancer patients
Presenter: Claudio Chini
Session: Poster Display session 1
Resources:
Abstract
4701 - Treatment-related adverse events and tolerability in patients with advanced non-squamous non-small cell lung cancer treated with first-line checkpoint inhibitors in combination with chemotherapy
Presenter: Ruth D'cunha
Session: Poster Display session 1
Resources:
Abstract
2985 - Clinical utility of a systematic toxicity assessment form (STAF) in patients with breast cancer receiving adjuvant or neoadjuvant therapy.
Presenter: Jwa Hoon Kim
Session: Poster Display session 1
Resources:
Abstract
2358 - Physicians’ satisfaction with Health-related quality of life (HRQoL) assessment in daily clinical practice using electronic patient-reported outcome (ePRO) for cancer patients.
Presenter: Guillaume Mouillet
Session: Poster Display session 1
Resources:
Abstract
5172 - Predictors of Survival in Patients with Incurable Cancer
Presenter: Erin Stella Sullivan
Session: Poster Display session 1
Resources:
Abstract
2281 - Patients and Physicians' Satisfaction with Telemedicine (TM) in Cancer Care and Factors that Correlate with a Positive Patient’s Experience
Presenter: Hurria Gondal
Session: Poster Display session 1
Resources:
Abstract
2193 - Adherence to ESMO 2014 guidelines on bone-targeting agent (BTA) initiation for breast and prostate cancer patients: real-world insights from practicing European physicians
Presenter: Alex Rider
Session: Poster Display session 1
Resources:
Abstract
2200 - Use of skeletal-related events preventive agents in patients with solid tumours and bone metastases in central Denmark
Presenter: Anders Boysen
Session: Poster Display session 1
Resources:
Abstract
2504 - Inadequacy of current definition and staging system of Medication-Related Osteonecrosis of Jaw (MRONJ) released by AAOMS : a Computed Tomography study in 151 cancer and myeloma patients
Presenter: Vittorio Fusco
Session: Poster Display session 1
Resources:
Abstract