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Ebokaiwe AP, Ushang OR, Ogunwa TH, Kikiowo B, Olusanya O. Quercetin attenuates cyclophosphamide induced-immunosuppressive indoleamine 2,3-dioxygenase in the hippocampus and cerebral cortex of male Wister rats. J Biochem Mol Toxicol 2022; 36:e23179. [PMID: 35906875 DOI: 10.1002/jbt.23179] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 06/17/2022] [Accepted: 07/21/2022] [Indexed: 12/16/2022]
Abstract
This study investigated the protective effect of quercetin against cyclophosphamide-induced immunosuppressive indoleamine 2,3-dioxygenase (IDO) via the mechanism of oxidative-inflammatory stress and behavioral indices. Cyclophosphamide (CYP) was administered to male Wister rats at a dose of 100 mg/kg with or without quercetin 50 mg/kg every other day for 7 days. Experimental techniques including western blotting, immunohistochemistry analysis, and inflammatory and oxidative stress marker assays were carried out. We also conducted behavioral analyses such as open field, tail suspension, and Y-maze tests for cognitive assessment. The results indicated that quercetin attenuated oxidative-inflammatory stress induced by CYP in the hippocampus and cerebral cortex of male Wister rats by augmenting the activities of antioxidant enzymes and suppressing lipid peroxidation as well as inflammatory mediators such as interleukin-6 and interferon-γ. Concomitantly, quercetin partially prevented the alteration in brain tissue histological architecture and mitigated the activities of IDO/tryptophan 2,3-dioxygenase (TDO) and protein expression of IDO1. This was corroborated by the IDO-quercetin model obtained in silico, revealing a favorable inhibitory interaction between quercetin and the enzyme. Finally, the results of behavioral tests suggested that quercetin significantly prevented the depressive-like posture of the CYP-treated rats. Our study for the first time revealed that quercetin ameliorates the effect of CYP-instigated IDO/TDO activities in the cerebral cortex and hippocampus via restoration of antioxidant enzymes and preventing oxidative-inflammatory stress.
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Affiliation(s)
- Azubuike P Ebokaiwe
- Toxicology and Immunotherapy Research Unit, Department of Biochemistry, Alex Ekwueme Federal University Ndufu Alike, Abakaliki, Nigeria
| | - Odobi R Ushang
- Toxicology and Immunotherapy Research Unit, Department of Biochemistry, Alex Ekwueme Federal University Ndufu Alike, Abakaliki, Nigeria
| | - Tomisin H Ogunwa
- Center for Bio-Computing and Drug Design, Adekunle Ajasin University, Akungba Akoko, Ondo State, Nigeria.,Department of Biochemistry, Adekunle Ajasin University, Akungba Akoko, Ondo State, Nigeria
| | - Babatomiwa Kikiowo
- Center for Bio-Computing and Drug Design, Adekunle Ajasin University, Akungba Akoko, Ondo State, Nigeria.,Department of Biochemistry, Adekunle Ajasin University, Akungba Akoko, Ondo State, Nigeria
| | - Olasiende Olusanya
- Institute of Biophysics, University of Chinese Academy of Sciences, Beijing, Chaoyang, China.,Department of Biochemistry, University of Benin, Benin City, Nigeria
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Alrazi IMD, Ogunwa TH, Kolawole AO, Elekofehinti OO, Omotuyi OI, Miyanishi T, Maruta S. Kolaflavanone, a biflavonoid derived from medicinal plant Garcinia, is an inhibitor of mitotic kinesin Eg5. J Biochem 2021; 170:611-622. [PMID: 34264310 DOI: 10.1093/jb/mvab083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 07/05/2021] [Indexed: 11/14/2022] Open
Abstract
Mitotic kinesin Eg5 remains a validated target in antimitotic therapy because of its essential role in the formation and maintenance of bipolar mitotic spindles. Although numerous Eg5 inhibitors of synthetic origin are known, only a few inhibitors derived from natural products have been reported. In our study, we focused on identifying novel Eg5 inhibitors from medicinal plants, particularly Garcinia species. Herein, we report the inhibitory effect of kolaflavanone (KLF), a Garcinia biflavonoid, on the ATPase and microtubule-gliding activities of mitotic kinesin Eg5. Additionally, we showed the interaction mechanism between Eg5 and KLF via in vitro and in silico analyses. The results revealed that KLF inhibited both the basal and microtubule-activated ATPase activities of Eg5. The inhibitory mechanism is allosteric, without a direct competition with adenosine-5'-diphosphate for the nucleotide-binding site. KLF also suppressed the microtubule gliding of Eg5 in vitro. The Eg5-KLF model obtained from molecular docking showed that the biflavonoid exists within the α2/α3/L5 (α2: Lys111-Glu116 and Ile135-Asp149, α3: Asn206-Thr226; L5: Gly117-Gly134) pocket, with a binding pose comparable to known Eg5 inhibitors. Overall, our data suggest that KLF is a novel allosteric inhibitor of mitotic kinesin Eg5.
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Affiliation(s)
- Islam M D Alrazi
- Department of Bioinformatics, Graduate School of Engineering, Soka University, 1-236 Tangi-cho, Hachioji, Tokyo 192-8577, Japan
| | - Tomisin H Ogunwa
- Department of Bioinformatics, Graduate School of Engineering, Soka University, 1-236 Tangi-cho, Hachioji, Tokyo 192-8577, Japan
| | - Ayodele O Kolawole
- Department of Biochemistry, The Federal University of Technology, Akure, Ondo State, PMB 704, Nigeria
| | - Olusola O Elekofehinti
- Department of Biochemistry, The Federal University of Technology, Akure, Ondo State, PMB 704, Nigeria
| | - Olaposi I Omotuyi
- Centre for Biocomputing and Drug Design, Biochemistry Department, Adekunle Ajasin University, Akungba-Akoko, Ondo State, PMB 001, Nigeria
| | - Takayuki Miyanishi
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Shinsaku Maruta
- Department of Bioinformatics, Graduate School of Engineering, Soka University, 1-236 Tangi-cho, Hachioji, Tokyo 192-8577, Japan
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Ogunwa TH, Sadakane K, Miyanishi T, Maruta S. Interaction and Inhibitory Mechanisms of Kolaflavanone, a Garcinia Biflavonoid, with Kinesin Eg5. Biophys J 2021. [DOI: 10.1016/j.bpj.2020.11.961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Oyewale MB, Seidu KT, Ogunbusola EM, Osundahunsi OF, Ogunwa TH, Akele O, Adejoro DO. Nutritional Composition and Sensory Quality of Packaged Ofe-Owerri: A Major Traditional Soup in Nigeria. CNF 2020. [DOI: 10.2174/1573401316999200330153519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Ofe-Owerri is an expensive traditional soup in Nigeria, prepared using Oha
(Pterocarpus soyauxi), Ukazi (Gnetum africanum), Uziza (Piper guineense) and cocoyam (Colocasia
esculanta) as the major vegetables. The soup is highly celebrated for its traditional therapeutic and
nutritional potentials.
Objective:
In this study, we assessed the proximate and mineral components, sensory and microbial
qualities of the Ofe-Owerri soup in a cooked and packaged form. Antioxidant status and phytoconstituents
of the major vegetables of the soup were also determined.
Methods:
Established methods were used as previously reported in the literature.
Results:
Calcium was the most concentrated mineral, whereas lead was absent. High moisture
(63.45%), crude protein (14.60%) and fat (13.27%) were found in the soup. The major ingredients
(vegetables) used to prepare Ofe-Owerri contain phytochemicals such as phenolic compounds and
saponins, and showed potent antioxidant activity in various in vitro models, with uziza displaying the
highest scavenging activity against 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical. The vegetables
exhibit reductive capacity against oxidants, and chelation of metallic free radicals. There was no significant
difference (p≤0.05) in the sensory parameters of Ofe-Owerri soup kept frozen in foil and
plastic containers, respectively, for 21 days.
Conclusion:
This study showed that Ofe-Owerri is a good dietary source of nutrients and possesses
phytoconstituents with potential beneficial health effects. When properly packaged, the soup can be
stored safely for up to three weeks.
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Affiliation(s)
- Mary B. Oyewale
- Department of Biochemistry, Adekunle Ajasin University, Akungba-Akoko, Nigeria
| | - Kudirat T. Seidu
- Department of Hospitality and Tourism Management, Federal University, Oye-Ekiti, Nigeria
| | - Eunice M. Ogunbusola
- Department of Food Science and Technology, Federal University Oye-Ekiti, Nigeria
| | | | - Tomisin H. Ogunwa
- Department of Biochemistry, Adekunle Ajasin University, Akungba-Akoko, Nigeria
| | - Olatunbosun Akele
- Department of Microbiology, Adekunle Ajasin University, Akungba-Akoko, Nigeria
| | - Damola O. Adejoro
- Department of Microbiology, Adekunle Ajasin University, Akungba-Akoko, Nigeria
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Omotuyi OI, Nash O, Safronetz D, Ojo AA, Ogunwa TH, Adelakun NS. T-705-modified ssRNA in complex with Lassa virus nucleoprotein exhibits nucleotide splaying and increased water influx into the RNA-binding pocket. Chem Biol Drug Des 2019; 93:544-555. [PMID: 30536557 DOI: 10.1111/cbdd.13451] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 11/18/2018] [Accepted: 11/24/2018] [Indexed: 12/28/2022]
Abstract
Lassa virus infection is clinically characterized by multiorgan failure in humans. Without an FDA-approved vaccine, ribavirin is the frontline drug for the treatment but with attendant toxicities. 6-Fluoro-3-hydroxy-2-pyrazinecarboxamide (T-705) is an emerging alternative drug with proven anti-Lassa virus activity in experimental model. One of the mechanisms of action is its incorporation into nascent single-strand RNA (ssRNA) which forms complex with Lassa nucleoprotein (LASV-NP). Here, using molecular dynamics simulation, the structural and electrostatics changes associated with LASV-NP-ssRNA complex have been studied when none, one, or four of its bases has been substituted with T-705. The results demonstrated that glycosidic torsion angle χ (O4'-C1'-N1-C2) rotated from high-anti- (-110° and -60°) to the syn- conformation (+30) with increased T-705 substitution. Similarly, increased T-705 substitution resulted in increased splaying (55°-70°), loss of ssRNA-LASV-NP H-bond interaction, increased water influx into the ssRNA-binding pocket, and decreased electrostatic potentials of ssRNA pocket. Furthermore, strong positively correlated motion observed between α6 residues (aa: 128-145) and its contact ssRNA bases (5-7) is weakened in Apo biosystem and transitioned into anticorrelated motions in ssRNA-bound LASV-NP biosystem. Finally, LASV genome may become more accessible to cellular ribonuclease access with T-705 incorporation due to loss of NP interaction.
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Affiliation(s)
- Olaposi I Omotuyi
- Center for Biocomputing and Drug Development, Adekunle Ajasin University, Akungba-Akoko, Nigeria
| | - Oyekanmi Nash
- Center for Genomics Research and Innovation, National Biotechnology Development Agency, NABDA/FMST, Abuja, Nigeria
| | - David Safronetz
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Ayodeji A Ojo
- Department of Public and Community Health, Liberty University, Lynchburg, Virginia
| | - Tomisin H Ogunwa
- Center for Biocomputing and Drug Development, Adekunle Ajasin University, Akungba-Akoko, Nigeria.,School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki, Japan
| | - Niyi S Adelakun
- Center for Biocomputing and Drug Development, Adekunle Ajasin University, Akungba-Akoko, Nigeria
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