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Choi D, Alshannaq AF, Yu JH. Safe and effective degradation of aflatoxins by food-grade culture broth of Aspergillus oryzae. PNAS NEXUS 2024; 3:pgae271. [PMID: 39010939 PMCID: PMC11249075 DOI: 10.1093/pnasnexus/pgae271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Accepted: 06/26/2024] [Indexed: 07/17/2024]
Abstract
Aflatoxins (AFs) are carcinogenic fungal toxins contaminating up to 25% of the global food supply. Over half of the world's population is exposed to unmonitored levels of AFs, mostly aflatoxin B1 (AFB1). Despite numerous efforts over the past 60 years, there are no solutions to remove AFs safely from food. Here, we present a safe and effective AF-degrading product called "D-Tox", a filtered culture broth of Aspergillus oryzae grown in a food-grade liquid medium. When 5 ppm of AFB1 is added to D-Tox, ∼90% is degraded at 48 and 24 hr at room temperature and 50°C, respectively. Moreover, when varying amounts (0.1 ppm ∼ 100 ppm) of AFB1 are added to D-Tox at 100°C, over 95% of AFB1 is degraded in 1 hr, suggesting a nonenzymatic process. Examining degradation of 100 ppm AFB1 reveals that aflatoxin D1 (AFD1) is the major transient degradant of AFB1, indicating that degradation occurs irreversibly by lactone ring hydrolysis followed by decarboxylation. D-Tox further degrades AFD1 to unknown fragmented products. Importantly, the practical application of D-Tox is also demonstrated, as more than 70% of AFB1 is degraded when wheat, corn, and peanuts naturally contaminated with high levels of AFB1 (0.3 ∼ 4.5 ppm) are boiled in D-Tox for 1 hr. Additionally, D-Tox can degrade other lactone-ring containing mycotoxins, including patulin and ochratoxin. D-Tox exhibits no cytotoxicity under the conditions tested in MCF-7 breast cancer cell lines. In summary, D-Tox is a safe and effective AF-detoxifying product that can enhance global food safety.
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Affiliation(s)
- Dasol Choi
- Department of Food Science, University of Wisconsin-Madison, 1550 Linden Drive, Madison, WI 53706, USA
- Food Research Institute, University of Wisconsin-Madison, 1550 Linden Drive, Madison, WI 53706, USA
- Department of Bacteriology, University of Wisconsin-Madison, 1550 Linden Drive, Madison, WI 53706, USA
| | - Ahmad F Alshannaq
- Department of Food Science, University of Wisconsin-Madison, 1550 Linden Drive, Madison, WI 53706, USA
- Food Research Institute, University of Wisconsin-Madison, 1550 Linden Drive, Madison, WI 53706, USA
- Department of Bacteriology, University of Wisconsin-Madison, 1550 Linden Drive, Madison, WI 53706, USA
| | - Jae-Hyuk Yu
- Food Research Institute, University of Wisconsin-Madison, 1550 Linden Drive, Madison, WI 53706, USA
- Department of Bacteriology, University of Wisconsin-Madison, 1550 Linden Drive, Madison, WI 53706, USA
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2
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Fahmy HM, Abdel-Rahman FM, El-Sayed AA, El-Sherif AA. Study of novel bidentate heterocyclic amine-based metal complexes and their biological activities: cytotoxicity and antimicrobial activity evaluation. BMC Chem 2023; 17:78. [PMID: 37454081 PMCID: PMC10349454 DOI: 10.1186/s13065-023-00996-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 06/30/2023] [Indexed: 07/18/2023] Open
Abstract
Metallic antitumor drugs with heterocyclic ligands, such as novel AMI (amino methyl imidazole) complexes [Pd(AMI)Cl2](1), [Cu(AMI)L1](2), and [Cu(AMI)L2·2H2O](3) where L1 = oxalate and L2 = malonate, were synthesized and characterized. Assessments included elemental analyses, mass spectrometry, Fourier transform-infrared spectroscopy, ultraviolet-visible spectroscopy, and thermal analysis. The cytotoxicity of AMI complexes compared to cisplatin was assessed using MTT (3-[4,5-dimethylthiazol-2-yl] 2,5diphenyl tetrazolium bromide) assay with breast (MCF-7) and cervical (HeLa) cancer cell lines. After treating these cells with the AMI complexes' IC50 values for 48 h, malondialdehyde levels and catalase activity were used to assess oxidative stress, antioxidant activity was evaluated with DPPH radical scavenging method, comet assays assessed DNA damage, and DNA fragmentation was evaluated using the gel electrophoresis. In vitro, antimicrobial activity was assessed using a disc diffusion method. The anticancer activity results showed that IC50 (half-maximal inhibitory concentration) values of complex one, two, and three against MCF-7 and HeLa cancer cells are 0.156 ± 0.0006, 0.125 ± 0.001, 0.277 ± 0.002 μM respectively for MCF-7 cells and 0.222 ± 0.0005, 0.126 ± 0.0009, 0.152 ± 0.001 μM respectively for HeLa cells. Complex two demonstrated strong anticancer activity against MCF-7 and Hela cells. The study of oxidative stress parameters revealed that Malondialdehyde levels increased in cancer cell lines treated with complexes compared to untreated cells. Catalase activity decreased in cells treated with palladium chelate. The DPPH radical scavenging assay results identified that complex one was a more potent antioxidant in MCF-7 and Hela cells than other complexes with SC50 values of 227.5 ± 0.28 and 361 ± 1.2 μL/mL, respectively. The comet assay results showed that complex two caused significant DNA damage in MCF-7 and HeLa cancer cells treated. Antimicrobial assays identified complex three as the most effective. Copper complexes give better antifungal activity against A. flavus than the palladium complex. We conclude that complex two is the most active in both cell types and might be assessed as a clinically useful drug for breast cancer treatment. The significance of the current study is the synthesis of antitumor drugs containing heterocyclic ligands, such as novel AMI complexes, and the study of their biological activities.
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Affiliation(s)
- Heba M Fahmy
- Biophysics Department, Faculty of Science, Cairo University, Giza, Egypt.
| | | | - Anwar A El-Sayed
- Biophysics Department, Faculty of Science, Cairo University, Giza, Egypt
| | - Ahmed A El-Sherif
- Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt
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3
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Mahmoud SM, Ali SH, Omar MMA. Cationic cellulose nanocrystals as sustainable green material for multi biological applications via ξ potential. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2023:1-25. [PMID: 36752027 DOI: 10.1080/09205063.2023.2177474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
The present study aims to disclose the activity of cationic cellulose nanocrystals (CNCs) as a promising multifunctional green nanomaterial with applications in biological aspects. The basic reason behind multifunctional behavior is zeta potential and size distribution of nano biopolymers; exhibit a remarkable physical and biological activity compared to normal molecules.The preliminary characterized studied using absorption spectral analysis showed strong absorption peak indicating that spectrum curves can be screen by UV spectra at wavelength range 200-400nm. Ultrastructural studies (SEM-EDS and TEM), manifest that CNCs are elliptical particles in shape. Also, TEM show CNCs are the ideal illustration of zero-dimensional (0-D) NPs, less than 5.1 nm in diameter with Cationic charge and similar results in size distribution by TEM. Nonetheless, developed as antioxidant activity IC50 was 1467 ± 25.9 µg/mL, antimicrobial activity tested G-ve strains, but not affected on tested G+ve strains and tested fungi. Evaluating toxicity effect of cationic CNCs against human blood erythrocytes (RBCs) and Lymphocyte Proliferation and the end point evaluate by comet assay, which proven no cytotoxic effect. Also, a high dose 500 µg/mL of CNCs highly significant (p < 0.05) reduction in cell viability of Caco-2 cancer cells after 24 h. incubation time, whereas the IC50 was 1884 ± 19.46 µg/mL. Moreover, genotoxic assay indicates Caco-2 cells cause apoptosis with no fragmentation in DNA. Undoubtedly, the obtained results brought about by the interaction of layers carrying opposing charges. Additionally, there is a balance between hydrophilic contact and electrostatic attraction. That emphasizes how the cationic CNCs have excellent potential for use as antioxidants, antimicrobials, and anticancer agents.
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Affiliation(s)
- Sara Mohamed Mahmoud
- Biotechnology Department, Faculty of Graduate Studies and Environmental Researches, Ain Shams University, Cairo, Egypt
| | - Safwat Hassan Ali
- Biochemistry Department, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
| | - Mohamed M A Omar
- Biochemistry Department, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
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4
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Karamahmutoglu H, Altay A, Vural S, Elitas M. Quantitative Investigation into the influence of intravenous fluids on human immune and cancer cell lines. Sci Rep 2020; 10:11792. [PMID: 32678120 PMCID: PMC7366617 DOI: 10.1038/s41598-020-61296-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 02/25/2020] [Indexed: 11/10/2022] Open
Abstract
The effect of intravenous fluids (IVF) has been investigated clinically through the assessment of post-treatment reactions. However, the responses to IVF vary from patient-to-patient. It is important to understand the response of IVF treatment to be able to provide optimal IVF care. Herein, we investigated the impact of commonly used IVFs, Dextrose, NaCl and Ringer on different human cancer (HepG2 (liver hepatocellular carcinoma) and MCF7 (breast adenocarcinoma)) and immune cell lines (U937 (lymphoma) monocyte and macrophages). The effect of IVF exposure on single cells was characterized using hemocytometer, fluorescence microscopy and flow cytometry. Quantitative data on the viability and morphology of the cells were obtained. Our results emphasize that different IVFs demonstrate important differences in how they influence distinct cell lines. Particularly, we observed that the lactated ringer and dextrose solutions altered the viability and nuclear size of cancer and immune cells differently. Our findings present valuable information to the knowledge of cellular-level IVF effects for further investigations in IVF usage on diverse patient populations and support the importance and necessity of developing optimal diluents not only for drug stability but also for patient benefits.
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Affiliation(s)
- Hande Karamahmutoglu
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, 34956, Turkey
- Sabanci University Nanotechnology and Application Center, Sabanci University, Istanbul, 34956, Turkey
| | - Alara Altay
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, 34956, Turkey
- Sabanci University Nanotechnology and Application Center, Sabanci University, Istanbul, 34956, Turkey
| | - Sumeyra Vural
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, 34956, Turkey
- Sabanci University Nanotechnology and Application Center, Sabanci University, Istanbul, 34956, Turkey
| | - Meltem Elitas
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, 34956, Turkey.
- Sabanci University Nanotechnology and Application Center, Sabanci University, Istanbul, 34956, Turkey.
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Nordin A, Chowdhury SR, Saim AB, Bt Hj Idrus R. Effect of Kelulut Honey on the Cellular Dynamics of TGFβ-Induced Epithelial to Mesenchymal Transition in Primary Human Keratinocytes. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17093229. [PMID: 32384749 PMCID: PMC7246951 DOI: 10.3390/ijerph17093229] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 04/18/2020] [Accepted: 04/20/2020] [Indexed: 01/08/2023]
Abstract
Over-induction of epithelial to mesenchymal transition (EMT) by tumor growth factor beta (TGFβ) in keratinocytes is a key feature in keloid scar. The present work seeks to investigate the effect of Kelulut honey (KH) on TGFβ-induced EMT in human primary keratinocytes. Image analysis of the real time observation of TGFβ-induced keratinocytes revealed a faster wound closure and individual migration velocity compared to the untreated control. TGFβ-induced keratinocytes also have reduced circularity and display a classic EMT protein expression. Treatment of 0.0015% (v/v) KH reverses these effects. In untreated keratinocytes, KH resulted in slower initial wound closure and individual migration velocity, which sped up later on, resulting in greater wound closure at the final time point. KH treatment also led to greater directional migration compared to the control. KH treatment caused reduced circularity in keratinocytes but displayed a partial EMT protein expression. Taken together, the findings suggest the therapeutic potential of KH in preventing keloid scar by attenuating TGFβ-induced EMT.
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Affiliation(s)
- Abid Nordin
- Department of Physiology, Faculty of Medicine, Cheras, Kuala Lumpur 56000, Malaysia;
- Tissue Engineering Centre, Universiti Kebangsaan Malaysia Medical Centre, Cheras, Kuala Lumpur 56000, Malaysia;
| | - Shiplu Roy Chowdhury
- Tissue Engineering Centre, Universiti Kebangsaan Malaysia Medical Centre, Cheras, Kuala Lumpur 56000, Malaysia;
| | - Aminuddin Bin Saim
- Ear, Nose & Throat Consultant Clinic, Ampang Puteri Specialist Hospital, Ampang, Selangor 68000, Malaysia;
| | - Ruszymah Bt Hj Idrus
- Department of Physiology, Faculty of Medicine, Cheras, Kuala Lumpur 56000, Malaysia;
- Tissue Engineering Centre, Universiti Kebangsaan Malaysia Medical Centre, Cheras, Kuala Lumpur 56000, Malaysia;
- Correspondence: ; Tel.: +60-39-145-7669
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6
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Yalcintas EP, Ackerman DS, Korkmaz E, Telmer CA, Jarvik JW, Campbell PG, Bruchez MP, Ozdoganlar OB. Analysis of In Vitro Cytotoxicity of Carbohydrate-Based Materials Used for Dissolvable Microneedle Arrays. Pharm Res 2020; 37:33. [DOI: 10.1007/s11095-019-2748-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 12/05/2019] [Indexed: 11/29/2022]
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7
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In vitro studies of glucose concentrations for Cell viability in normal and cancer cells. ACTA ACUST UNITED AC 2018. [DOI: 10.22376/ijpbs.2018.9.3.b77-81] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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8
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Di Mauro MD, Tomasello B, Giardina RC, Dattilo S, Mazzei V, Sinatra F, Caruso M, D'Antona N, Renis M. Sugar and mineral enriched fraction from olive mill wastewater for promising cosmeceutical application: characterization, in vitro and in vivo studies. Food Funct 2018; 8:4713-4722. [PMID: 29165474 DOI: 10.1039/c7fo01363a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Nowadays, agro-food by-products represent a potential low-cost source of biologically active ingredients which have been paid significant attention as nutraceuticals, medicine, food and cosmetics. In a previous study we evaluated the total sugars, metals and polyphenols of olive mill wastewater (OMWW) from a Cerasuola olive cultivar. In the present work we selectively recovered a sugar and mineral enriched fraction (SMEF) from Cerasuola OMWW by a green adsorption/desorption process. The SMEF was mainly found to be composed of monosaccharides and potassium by HPLC-ELSD and ICP-MS. The in vitro cytotoxicity on human fibroblasts, at different concentrations of the fraction, was investigated by MTT and comet assays. In addition, intracellular reactive oxygen species (ROS) production, apoptosis and cell morphological changes were examined. The physical stability of a formulation containing the SMEF (1% w/w) and its in vivo skin effects were also assessed.Our results highlighted that the SMEF showed a toxic effect at higher concentrations (i.e. cell viability reduction, DNA fragmentation and morphological alterations) well correlated with high ROS levels. Conversely, at low concentrations (0.5% and 1% w/w), no significant changes were observed. For the first time, through stability studies and in vivo tests, we also demonstrated that the SMEF formulation is stable and safe for topical application, since skin hydration improvement without negative effects was observed after 7 days of its use. Therefore, the SMEF has great potential to be used for cosmeceutical applications.
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Affiliation(s)
- Maria Domenica Di Mauro
- Department of Drug Sciences, Biochemistry Section, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy.
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9
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The effects of high glucose on tendon-derived stem cells: implications of the pathogenesis of diabetic tendon disorders. Oncotarget 2017; 8:17518-17528. [PMID: 28407683 PMCID: PMC5392267 DOI: 10.18632/oncotarget.15418] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 02/07/2017] [Indexed: 12/17/2022] Open
Abstract
Patients with diabetes are at great risk to suffer many musculoskeletal disorders, such as tendinopathy, tendon rupture and impaired tendon healing. However, the pathogenesis of these tendon disorders still remains unclear. In this study, we aimed to investigate the effects of high glucose on cell proliferation, cell apoptosis and tendon-related markers expression of tendon-derived stem cells (TDSCs) in vitro. These findings might provide new insights into the pathogenesis of diabetic tendon disorders. The cell proliferative ability and apoptosis rate of TDSCs in different groups were evaluated by MTT assay and Annexin V-FITC/PI staining assay. The mRNA expression of tendon-related markers (Scleraxis and Collagen I alpha 1 chain) were assessed by qRT-PCR. The protein expression of tendon-related markers (Tenomodulin and Collagen I) were measured by Western blotting. The proliferative ability of TDSCs treated with high glucose (15mM and 25mM) decreased significantly at day1, day3 and day5. The cell apoptosis of TDSCs increased significantly when they were cultured with high glucose for 48h in vitro. The gene expression of Scleraxis and Collagen I alpha 1 chain in TDSCs decreased significantly when they were treated with high glucose for 24h and 48h. The protein expression of Tenomodulin and Collagen I in TDSCs decreased significantly when they were treated with high glucose for 24h and 48h. High glucose could inhibit cell proliferation, induce cell apoptosis and suppress the tendon-related markers expression of TDSCs in vitro. These findings might account for some pathological mechanisms underlying the pathogenesis of diabetic tendon disorders.
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10
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Sun L, Yin Y, Clark LH, Sun W, Sullivan SA, Tran AQ, Han J, Zhang L, Guo H, Madugu E, Pan T, Jackson AL, Kilgore J, Jones HM, Gilliam TP, Zhou C, Bae-Jump VL. Dual inhibition of glycolysis and glutaminolysis as a therapeutic strategy in the treatment of ovarian cancer. Oncotarget 2017; 8:63551-63561. [PMID: 28969010 PMCID: PMC5609942 DOI: 10.18632/oncotarget.18854] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 06/04/2017] [Indexed: 01/12/2023] Open
Abstract
Cancer cell metabolism is required to support the biosynthetic demands of cell growth and cell division, and to maintain reduction oxidaton (redox) homeostasis. This study was designed to test the effects of glucose and glutamine on ovarian cancer cell growth and explore the inter-relationship between glycolysis and glutaminolysis. The SKOV3, IGROV-1 and Hey ovarian cancer cell lines were assayed for glucose, pyruvate and glutamine dependence by analyzing cytotoxicity, cell cycle progression, apoptosis and ATP production. As determined by MTT assay, glucose stimulated cell growth while the combination of glucose, glutamine and pyruvate resulted in the greatest stimulation of cell proliferation. Furthermore, 2-deoxy-glucose (2-DG) and 3-bromopyruvate (3-BP) induced apoptosis, caused G1 phase cell cycle arrest and reduced glycolytic activity. Moreover, 2-DG in combination with a low dose of aminooxyacetate (AOA) synergistically increased the sensitivity to 2-DG in the inhibition of cell growth in the ovarian cancer cell lines. These studies suggest that dual inhibition of glycolysis and glutaminolysis may be a promising therapeutic strategy for the treatment of ovarian cancer.
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Affiliation(s)
- Li Sun
- Department of Gynecologic Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, Shandong Province, People's Republic of China.,Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Yajie Yin
- Department of Gynecologic Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, Shandong Province, People's Republic of China.,School of Medicine and Life Sciences, University of Jinan, Shandong Academy of Medical Sciences, Jinan, Shandong Province, People's Republic of China.,Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Leslie H Clark
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Wenchuan Sun
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Stephanie A Sullivan
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Arthur-Quan Tran
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Jianjun Han
- Department of Surgical Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, Shandong Province, People's Republic of China
| | - Lu Zhang
- Department of Gynecologic Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, Shandong Province, People's Republic of China
| | - Hui Guo
- Department of Gynecologic Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, Shandong Province, People's Republic of China
| | - Esther Madugu
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Tommy Pan
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Amanda L Jackson
- Division of Gynecologic Oncology, University of Cincinnati, Cincinnati, OH, USA
| | - Joshua Kilgore
- Houston Methodist Gynecologic Oncology Associates, Houston, TX, USA
| | - Hannah M Jones
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Timothy P Gilliam
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Chunxiao Zhou
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Victoria L Bae-Jump
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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11
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Skipper A, Sims JN, Yedjou CG, Tchounwou PB. Cadmium Chloride Induces DNA Damage and Apoptosis of Human Liver Carcinoma Cells via Oxidative Stress. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13010088. [PMID: 26729151 PMCID: PMC4730479 DOI: 10.3390/ijerph13010088] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Revised: 11/16/2015] [Accepted: 11/25/2015] [Indexed: 12/19/2022]
Abstract
Cadmium is a heavy metal that has been shown to cause its toxicity in humans and animals. Many documented studies have shown that cadmium produces various genotoxic effects such as DNA damage and chromosomal aberrations. Ailments such as bone disease, renal damage, and several forms of cancer are attributed to overexposure to cadmium. Although there have been numerous studies examining the effects of cadmium in animal models and a few case studies involving communities where cadmium contamination has occurred, its molecular mechanisms of action are not fully elucidated. In this research, we hypothesized that oxidative stress plays a key role in cadmium chloride-induced toxicity, DNA damage, and apoptosis of human liver carcinoma (HepG₂) cells. To test our hypothesis, cell viability was determined by MTT assay. Lipid hydroperoxide content stress was estimated by lipid peroxidation assay. Genotoxic damage was tested by the means of alkaline single cell gel electrophoresis (Comet) assay. Cell apoptosis was measured by flow cytometry assessment (Annexin-V/PI assay). The result of MTT assay indicated that cadmium chloride induces toxicity to HepG₂ cells in a concentration-dependent manner, showing a 48 hr-LD50 of 3.6 µg/mL. Data generated from lipid peroxidation assay resulted in a significant (p < 0.05) increase of hydroperoxide production, specifically at the highest concentration tested. Data obtained from the Comet assay indicated that cadmium chloride causes DNA damage in HepG₂ cells in a concentration-dependent manner. A strong concentration-response relationship (p < 0.05) was recorded between annexin V positive cells and cadmium chloride exposure. In summary, these in vitro studies provide clear evidence that cadmium chloride induces oxidative stress, DNA damage, and programmed cell death in human liver carcinoma (HepG₂) cells.
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Affiliation(s)
- Anthony Skipper
- Molecular Toxicology Research Laboratory, NIH-Center for Environmental Health, College of Science, Engineering and Technology, Jackson State University, 1400 Lynch Street, Box 18540, Jackson, MS 39217, USA.
| | - Jennifer N Sims
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Bookline Avenue, Boston, MA 02215, USA.
| | - Clement G Yedjou
- Molecular Toxicology Research Laboratory, NIH-Center for Environmental Health, College of Science, Engineering and Technology, Jackson State University, 1400 Lynch Street, Box 18540, Jackson, MS 39217, USA.
| | - Paul B Tchounwou
- Molecular Toxicology Research Laboratory, NIH-Center for Environmental Health, College of Science, Engineering and Technology, Jackson State University, 1400 Lynch Street, Box 18540, Jackson, MS 39217, USA.
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12
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Cadmium Chloride Induces DNA Damage and Apoptosis of Human Liver Carcinoma Cells via Oxidative Stress. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016. [PMID: 26729151 DOI: 10.3390/ijerph13010088]] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Cadmium is a heavy metal that has been shown to cause its toxicity in humans and animals. Many documented studies have shown that cadmium produces various genotoxic effects such as DNA damage and chromosomal aberrations. Ailments such as bone disease, renal damage, and several forms of cancer are attributed to overexposure to cadmium. Although there have been numerous studies examining the effects of cadmium in animal models and a few case studies involving communities where cadmium contamination has occurred, its molecular mechanisms of action are not fully elucidated. In this research, we hypothesized that oxidative stress plays a key role in cadmium chloride-induced toxicity, DNA damage, and apoptosis of human liver carcinoma (HepG₂) cells. To test our hypothesis, cell viability was determined by MTT assay. Lipid hydroperoxide content stress was estimated by lipid peroxidation assay. Genotoxic damage was tested by the means of alkaline single cell gel electrophoresis (Comet) assay. Cell apoptosis was measured by flow cytometry assessment (Annexin-V/PI assay). The result of MTT assay indicated that cadmium chloride induces toxicity to HepG₂ cells in a concentration-dependent manner, showing a 48 hr-LD50 of 3.6 µg/mL. Data generated from lipid peroxidation assay resulted in a significant (p < 0.05) increase of hydroperoxide production, specifically at the highest concentration tested. Data obtained from the Comet assay indicated that cadmium chloride causes DNA damage in HepG₂ cells in a concentration-dependent manner. A strong concentration-response relationship (p < 0.05) was recorded between annexin V positive cells and cadmium chloride exposure. In summary, these in vitro studies provide clear evidence that cadmium chloride induces oxidative stress, DNA damage, and programmed cell death in human liver carcinoma (HepG₂) cells.
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13
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Han J, Zhang L, Guo H, Wysham WZ, Roque DR, Willson AK, Sheng X, Zhou C, Bae-Jump VL. Glucose promotes cell proliferation, glucose uptake and invasion in endometrial cancer cells via AMPK/mTOR/S6 and MAPK signaling. Gynecol Oncol 2015; 138:668-75. [PMID: 26135947 DOI: 10.1016/j.ygyno.2015.06.036] [Citation(s) in RCA: 125] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 06/23/2015] [Accepted: 06/24/2015] [Indexed: 12/17/2022]
Abstract
OBJECTIVES Obesity and diabetes are well-known risk factors for the development of endometrial cancer. A high rate of aerobic glycolysis represents a key mechanism by which endometrial cancer cells consume glucose as its primary energy source. The up-regulated glycolytic pathway is a common therapeutic target whose inhibition has implications for anti-tumor activity in cancer cells. This study aimed to investigate the effect of various concentrations of glucose on cell proliferation in endometrial cancer. METHODS ECC-1 and Ishikawa cells were treated with low glucose (1mM), normal glucose (5mM) and high glucose (25mM), and cytotoxicity, apoptosis, cell cycle, adhesion/invasion, and changes of AMPK/mTOR/S6 and MAPK pathways were evaluated. RESULTS Our results revealed that high glucose increased cell growth and clonogenicity in two endometrial cancer cell lines in a dose dependent manner. Low glucose induced the activity of cleaved caspase 3 and caused cell cycle G1 arrest. High glucose increased the ability of adhesion and invasion by decreasing E-cadherin and increasing Snail expression. In addition, high glucose increased glucose uptake and glycolytic activity through modulating the AMPK/mTOR/S6 and MAPK pathways. CONCLUSIONS Our findings suggest that glucose stimulated cell proliferation through multiple complex signaling pathways. Targeting glucose metabolism may be a promising therapeutic strategy in the treatment of endometrial cancer.
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Affiliation(s)
- Jianjun Han
- Department of Surgical Oncology, Shandong Cancer Hospital and Institute, Jinan, China; Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Lu Zhang
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; School of Medicine and Life Sciences, University of Jinan, Shandong Academy of Medical Sciences, China; Department of Gynecologic Oncology, Shandong Cancer Hospital and Institute, Jinan, China
| | - Hui Guo
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; School of Medicine and Life Sciences, University of Jinan, Shandong Academy of Medical Sciences, China; Department of Gynecologic Oncology, Shandong Cancer Hospital and Institute, Jinan, China
| | - Weiya Z Wysham
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Dario R Roque
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Adam K Willson
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Xiugui Sheng
- Department of Gynecologic Oncology, Shandong Cancer Hospital and Institute, Jinan, China
| | - Chunxiao Zhou
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
| | - Victoria L Bae-Jump
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
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