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Khajah MA, Khushaish S, Luqmani YA. Glucose deprivation reduces proliferation and motility, and enhances the anti-proliferative effects of paclitaxel and doxorubicin in breast cell lines in vitro. PLoS One 2022; 17:e0272449. [PMID: 35917304 PMCID: PMC9345370 DOI: 10.1371/journal.pone.0272449] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 07/20/2022] [Indexed: 11/19/2022] Open
Abstract
Background Breast cancer chemotherapy with high dose alkylating agents is severely limited by their collateral toxicity to crucial normal tissues such as immune and gut cells. Taking advantage of the selective dependence of cancer cells on high glucose and combining glucose deprivation with these agents could produce therapeutic synergy. Methods In this study we examined the effect of glucose as well as its deprivation, and antagonism using the non-metabolized analogue 2-deoxy glucose, on the proliferation of several breast cancer cell lines MCF7, MDA-MB-231, YS1.2 and pII and one normal breast cell line, using the MTT assay. Motility was quantitatively assessed using the wound healing assay. Lactate, as the end product of anaerobic glucose metabolism, secreted into culture medium was measured by a biochemical assay. The effect of paclitaxel and doxorubicin on cell proliferation was tested in the absence and presence of low concentrations of glucose using MTT assay. Results In all cell lines, glucose supplementation enhanced while glucose deprivation reduced both their proliferation and motility. Lactate added to the medium could substitute for glucose. The inhibitory effects of paclitaxel and doxorubicin were significantly enhanced when glucose concentration was decreased in the culture medium, requiring 1000-fold lesser concentration to achieve a similar degree of inhibition to that seen in glucose-containing medium. Conclusion Our data show that a synergy was obtained by combining paclitaxel and doxorubicin with glucose reduction to inhibit cancer cell growth, which in vivo, might be achieved by applying a carbohydrate-restricted diet during the limited phase of application of chemotherapy; this could permit a dose reduction of the cytotoxic agents, resulting in greater tolerance and lesser side effects.
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Dogan S, Cicekdal MB, Ozorhan U, Karabiyik G, Kazan BT, Ekici ID, Yilmaz B, Demirel PB, Coban I, Tuysuz EC, Kuskucu A, Bayrak OF, Cleary MP, Tuna BG. Roles of adiponectin and leptin signaling-related microRNAs in the preventive effects of calorie restriction in mammary tumor development. Appl Physiol Nutr Metab 2021; 46:866-876. [PMID: 33493087 DOI: 10.1139/apnm-2020-1000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Calorie restriction (CR) is suggested to prevent the development of mammary tumors (MTs); however, the mechanism remains to be clarified. We aimed to determine the microRNA (miRNA) profile in mice applied to 2 different CR protocols; chronic (CCR) and intermittent (ICR) and follow the MT development. In addition, the roles of miRNAs involved in adiponectin and/or leptin signaling pathways were investigated. Mice were divided into 3 groups: ad-libitum (AL), CCR, or ICR, which comprised 3 weeks of AL feeding followed by 1 week of 60% CR in a cyclic manner. Blood and tissue collection were performed at weeks 10, 17/18, 49/50 and 81/82. Long-term CCR provided better protection compared with ICR for MT development with a delay in the MT occurrence. Adiponectin expression in mammary fat pad were significantly higher in CCR group compared with AL. Using GeneChip Array, 250 of 3195 miRNAs were differentially expressed among the dietary groups. Thirteen of 250 miRNAs were related to adiponectin and/or leptin signaling genes. Results were verified by reverse transcription polymerase chain reaction. Specifically, miR-326-3p, miR-500-3p and miR-129-5p, which are related to adiponectin and/or leptin signaling, may play important roles in the preventive effects of CR in MT development and in ageing. Thus, these miRNAs might be putative biomarkers to target for diagnostic and treatment purposes. Novelty: Type of CR and micro RNA interaction is related to ageing. miR-326-3p, miR-500-3p and miR-129-5p expression levels were differentially expressed in MT development and in ageing. The genes associated with adiponectin and/or leptin signaling pathways are regulated by certain miRNAs in the protective effects of CR.
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Affiliation(s)
- Soner Dogan
- Department of Medical Biology, School of Medicine, Yeditepe University, Istanbul, Turkey
| | - Munevver B Cicekdal
- Department of Medical Biology, School of Medicine, Yeditepe University, Istanbul, Turkey.,Faculty of Medicine and Health Sciences, Medical Biology, Ghent University, Ghent, Belgium
| | - Umit Ozorhan
- Institute of Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Lübeck, Germany
| | - Goktug Karabiyik
- Department of Biophysics, School of Medicine, Yeditepe University, Istanbul, Turkey
| | - Busra T Kazan
- Department of Medical Biology, School of Medicine, Yeditepe University, Istanbul, Turkey
| | - Isin D Ekici
- Department of Pathology, School of Medicine, Yeditepe University, Istanbul, Turkey
| | - Bayram Yilmaz
- Department of Physiology, School of Medicine, Yeditepe University, Istanbul, Turkey
| | - Pinar B Demirel
- Department of Medical Biology and Genetics, School of Medicine, Maltepe University, Istanbul, Turkey
| | - Ilker Coban
- Department of Medical Biology, School of Medicine, Yeditepe University, Istanbul, Turkey
| | - Emre Can Tuysuz
- Department of Translational Medicine, Lund University, Lund, Sweden
| | - Aysegul Kuskucu
- Department of Genetics, School of Medicine, Yeditepe University, Istanbul, Turkey
| | - Omer F Bayrak
- Department of Genetics, School of Medicine, Yeditepe University, Istanbul, Turkey
| | - Margot P Cleary
- Hormel Institute Medical Research Center, University of Minnesota, Austin, MN, USA
| | - Bilge G Tuna
- Department of Biophysics, School of Medicine, Yeditepe University, Istanbul, Turkey
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Demirel PB, Dogan S, Ozorhan U, Tuna BG, Schuster TF, Cleary MP. Effects of leptin on the viability of MCF-7 and T47D cells at different glucose concentrations. JOURNAL OF EXPERIMENTAL AND CLINICAL MEDICINE 2020; 37:119-125. [PMID: 33408552 PMCID: PMC7783410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Obesity is associated with increased risk of breast cancer. Leptin is a well-known factor involved in obesity and its serum levels are increased in breast cancer. Hyperglycemia is another significant risk factor for breast cancer. Consistently, high glucose induces proliferation and invasion of breast cancer cells and in-vivo calorie restriction reduce tumorigenesis in rodent models. The aim of this study was to investigate the effect of leptin on the viability and mode of cell death in breast cancer cells incubated in different glucose concentrations to represent caloric restriction. For this purpose, MCF-7 and T47D breast cancer cells incubated in different glucose concentrations for a total of 72 hours were treated with or without leptin either for one hour or 24 hours and the ratio of apoptotic, necrotic and alive cells were analyzed by flow cytometry. Our data revealed that glucose incubation significantly decreased apoptosis and necrosis, while increasing viability in both cell lines in a dose dependent manner. One-hour leptin treatment significantly decreased viability, and increased apoptosis but did not significantly affect necrosis in T47D cells incubated in 2.5 mM glucose. In MCF-7 cells, one-hour leptin incubation significantly increased necrosis but its effects on apoptosis and viability were not significant. In conclusion, although glucose induces cell death by apoptosis and necrosis in T47D and MCF-7 cells respectively in a dose dependent manner, the overallviability is still increased in both cell lines. One-hour leptin treatment reverses the effect of low glucose incubation on apoptosis of T47D and necrosis of MCF-7 cells. Moreover, the effect of one-hour leptin treatment on apoptosis or necrosis is significantly higher than that of 24-hour leptin treatment.
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Affiliation(s)
- Pinar B. Demirel
- Department of Medical Biology and Genetics, Faculty of Medicine, Maltepe University, Istanbul, Turkey
| | - Soner Dogan
- Department of Medical Biology, Faculty of Medicine, Yeditepe University, Istanbul, Turkey
- Hormel Institute Medical Research Center, University of Minnesota, Austin, MN, USA
| | - Umit Ozorhan
- Department of Medical Biology, Faculty of Medicine, Yeditepe University, Istanbul, Turkey
| | - Bilge G. Tuna
- Department of Biophysics, Faculty of Medicine, Yeditepe University, Istanbul, Turkey
| | - Todd F. Schuster
- Hormel Institute Medical Research Center, University of Minnesota, Austin, MN, USA
| | - Margot P. Cleary
- Hormel Institute Medical Research Center, University of Minnesota, Austin, MN, USA
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