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Ibitoye OB, Uwazie JN, Ajiboye TO. Bioactivity-guided isolation of kaempferol as the antidiabetic principle from Cucumis sativus
L. fruits. J Food Biochem 2017. [DOI: 10.1111/jfbc.12479] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Oluwayemisi B. Ibitoye
- Antioxidants, Redox Biology and Toxicology Research Laboratory, Department of Biological Sciences; Al-Hikmah University; Ilorin Nigeria
| | - Judith N. Uwazie
- Department of Biochemistry; University of Ilorin; Ilorin Nigeria
| | - Taofeek O. Ajiboye
- Antioxidants, Redox Biology and Toxicology Research Group, Department of Medical Biochemistry, College of Health Sciences; Nile University of Nigeria; Abuja Nigeria
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Ajiboye TO, Habibu RS, Saidu K, Haliru FZ, Ajiboye HO, Aliyu NO, Ibitoye OB, Uwazie JN, Muritala HF, Bello SA, Yusuf II, Mohammed AO. Involvement of oxidative stress in protocatechuic acid-mediated bacterial lethality. Microbiologyopen 2017; 6. [PMID: 28349673 PMCID: PMC5552917 DOI: 10.1002/mbo3.472] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 02/01/2017] [Accepted: 02/16/2017] [Indexed: 12/13/2022] Open
Abstract
The involvement of oxidative stress in protocatechuic acid‐mediated bacterial lethality was investigated. Minimum inhibitory concentrations (MIC) and minimum bactericidal concentration (MBC) of protocatechuic acid against Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus are 600 and 700 μg/ml, 600 and 800 μg/ml, and 600 and 800 μg/ml, respectively. The optical densities and colony‐forming units of protocatechuic acid‐treated bacteria decreased in time‐dependent manner. Protocatechuic acid (4× MIC) significantly increased the superoxide anion content of E. coli, P. aeruginosa, and S. aureus compared to dimethyl sulfoxide (DMSO). Superoxide dismutase, catalase, and NAD+/NADH in protocatechuic acid‐treated E. coli, P. aeruginosa, and S. aureus increased significantly when compared to DMSO. Conversely, level of reduced glutathione decreased in protocatechuic acid‐treated E. coli, P. aeruginosa, and S. aureus, while glutathione disulfide increased when compared to DMSO. Furthermore, malondialdehyde and fragmented DNA increased significantly following exposure to protocatechuic acid. Protocatechuic acid inhibited the activity of complexes I and II. From the above findings, protocatechuic acid enhanced the generation of reactive oxygen species (superoxide anion radical and hydroxyl radical) in E. coli, P. aeruginosa, and S. aureus, possibly by autoxidation, fenton chemistry, and inhibiting electron transport chain resulting in lipid peroxidation and DNA fragmentation and consequentially bacterial cell death.
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Affiliation(s)
- Taofeek O Ajiboye
- Antioxidants, Redox Biology and Toxicology Research Laboratory, Department of Biological Sciences, Al-Hikmah University, Ilorin, Nigeria
| | - Ramat S Habibu
- Antioxidants, Redox Biology and Toxicology Research Laboratory, Department of Biological Sciences, Al-Hikmah University, Ilorin, Nigeria
| | - Kabiru Saidu
- Antioxidants, Redox Biology and Toxicology Research Laboratory, Department of Biological Sciences, Al-Hikmah University, Ilorin, Nigeria
| | - Fatimah Z Haliru
- Antioxidants, Redox Biology and Toxicology Research Laboratory, Department of Biological Sciences, Al-Hikmah University, Ilorin, Nigeria
| | - Hikmat O Ajiboye
- Department of Biochemistry, University of Ilorin, Ilorin, Nigeria
| | - Najeeb O Aliyu
- Department of Biochemistry, University of Ilorin, Ilorin, Nigeria
| | - Oluwayemisi B Ibitoye
- Antioxidants, Redox Biology and Toxicology Research Laboratory, Department of Biological Sciences, Al-Hikmah University, Ilorin, Nigeria
| | - Judith N Uwazie
- Department of Biochemistry, University of Ilorin, Ilorin, Nigeria
| | | | - Sharafa A Bello
- Microbiology Unit, Department of Biological Sciences, Al-Hikmah University, Ilorin, Nigeria
| | - Idris I Yusuf
- Microbiology Unit, Department of Biological Sciences, Al-Hikmah University, Ilorin, Nigeria
| | - Aisha O Mohammed
- Microbiology Unit, Department of Biological Sciences, Al-Hikmah University, Ilorin, Nigeria
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