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Mustapha O, Grochow T, Olopade J, Fietz SA. Neocortex neurogenesis and maturation in the African greater cane rat. Neural Dev 2023; 18:7. [PMID: 37833718 PMCID: PMC10571270 DOI: 10.1186/s13064-023-00175-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 05/10/2023] [Accepted: 09/20/2023] [Indexed: 10/15/2023] Open
Abstract
BACKGROUND Neocortex development has been extensively studied in altricial rodents such as mouse and rat. Identification of alternative animal models along the "altricial-precocial" spectrum in order to better model and understand neocortex development is warranted. The Greater cane rat (GCR, Thyronomys swinderianus) is an indigenous precocial African rodent. Although basic aspects of brain development in the GCR have been documented, detailed information on neocortex development including the occurrence and abundance of the distinct types of neural progenitor cells (NPCs) in the GCR are lacking. METHODS GCR embryos and fetuses were obtained from timed pregnant dams between gestation days 50-140 and their neocortex was analyzed by immunofluorescence staining using characteristic marker proteins for NPCs, neurons and glia cells. Data were compared with existing data on closely related precocial and altricial species, i.e. guinea pig and dwarf rabbit. RESULTS The primary sequence of neuro- and gliogenesis, and neuronal maturation is preserved in the prenatal GCR neocortex. We show that the GCR exhibits a relatively long period of cortical neurogenesis of 70 days. The subventricular zone becomes the major NPC pool during mid-end stages of neurogenesis with Pax6 + NPCs constituting the major basal progenitor subtype in the GCR neocortex. Whereas dendrite formation in the GCR cortical plate appears to initiate immediately after the onset of neurogenesis, major aspects of axon formation and maturation, and astrogenesis do not begin until mid-neurogenesis. Similar to the guinea pig, the GCR neocortex exhibits a high maturation status, containing neurons with well-developed dendrites and myelinated axons and astrocytes at birth, thus providing further evidence for the notion that a great proportion of neocortex growth and maturation in precocial mammals occurs before birth. CONCLUSIONS Together, this work has deepened our understanding of neocortex development of the GCR, of the timing and the cellular differences that regulate brain growth and development within the altricial-precocial spectrum and its suitability as a research model for neurodevelopmental studies. The timelines of brain development provided by this study may serve as empirical reference data and foundation in future studies in order to model and better understand neurodevelopment and associated alterations.
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Affiliation(s)
- Oluwaseun Mustapha
- Neuroscience Unit, Department of Veterinary Anatomy, College of Veterinary Medicine, Federal University of Agriculture Abeokuta, Abeokuta, Ogun State, Nigeria
- Institute of Veterinary Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany
| | - Thomas Grochow
- Institute of Veterinary Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany
| | - James Olopade
- Neuroscience Unit, Department of Veterinary Anatomy, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Oyo State, Nigeria
| | - Simone A Fietz
- Institute of Veterinary Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany.
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Gilbert T, Olaolorun F, Ladagu A, Olopade F, Igado O, Olopade J. Neurobehavioural and Histological Study of the Effects of Low-Dose and High-Dose Vanadium in Brain, Liver and Kidney of Mice. Niger J Physiol Sci 2023; 38:47-56. [PMID: 38243355 DOI: 10.54548/njps.v38i1.8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 09/24/2023] [Indexed: 01/21/2024]
Abstract
Vanadium is a ubiquitous transition metal that has been generating contrasting research interest. Therapeutically, vanadium possess antidiabetic, antitumor, antiparasitic and even neuroprotective activities. On the flip side, vanadium has been reported to cause multisystemic toxicities with a strong predilection for the nervous system. Despite several reports on potential benefits of low-dose vanadium (LDV) and toxic effects of high-dose vanadium (HDV), there are no comparative studies done thus far. This study therefore explored the comparative effects of LDV and HDV exposure in mice during postnatal development. A total of nine (9) nursing mice were used in this study; with three nursing mice and their pups (n = 12 pups per group) randomly assigned to each of the three test groups. The nursing dam were given intraperitoneal (i.p) injection of vanadium at 0.15mg/kg and 3mg/kg for LDV and HDV respectively, and subseqently to the pups from postnatal day (PND) 15 till sacrifice on PND 90. We discovered that neurodevelopmental motor function test of mice-pups exposed to LDV here showed improved motor development, muscular strength and memory capacities whereas HDV led to motor function impairment, reduced muscular strength and memory capacities. LDV-exposed mice showed mild histological lesions in cerebral cortex whereas high-dose showed distinct histological lesions in different parts of the brain ranging from cerebellar Purkinje neuronal pathology (central chromatolysis), pyramidal neuronal loss in CA1 region, architectural distortion as well as fewer neurons in olfactory bulb. We saw mild lesions with LDV in both liver and kidney, however, with HDV exposure, there was diffuse hepatocellular vacuolar degeneration and congestion of blood vessels in liver, shrinkage of renal glomerulus and degenerated epithelial cells of kidney. Conclusively, beneficial effect of vanadium is proven as it facilitated body weight gain which translate in organ weight at low-dose, while high-dose caused decreased neurobehaviour and histological lesions.
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Affiliation(s)
| | - Francis Olaolorun
- Department of Veterinary Anatomy, College of Veterinary Medicine, Federal University of Agriculture, Abeokuta, Nigeria.
| | - Amany Ladagu
- Department of Veterinary Anatomy, University of Ibadan, Ibadan, Nigeria.
| | | | - Olumayowa Igado
- Department of Veterinary Anatomy, University of Ibadan, Ibadan, Nigeria.
| | - James Olopade
- Department of Veterinary Anatomy, University of Ibadan, Ibadan, Nigeria.
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Fatola OI, Keller M, Balkema-Buschmann A, Olopade J, Groschup MH, Fast C. Strain Typing of Classical Scrapie and Bovine Spongiform Encephalopathy (BSE) by Using Ovine PrP (ARQ/ARQ) Overexpressing Transgenic Mice. Int J Mol Sci 2022; 23:ijms23126744. [PMID: 35743187 PMCID: PMC9223460 DOI: 10.3390/ijms23126744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 06/10/2022] [Accepted: 06/14/2022] [Indexed: 11/16/2022] Open
Abstract
Transmissible spongiform encephalopathies (TSE), caused by abnormal prion protein (PrPSc), affect many species. The most classical scrapie isolates harbor mixtures of strains in different proportions. While the characterization of isolates has evolved from using wild-type mice to transgenic mice, no standardization is established yet. Here, we investigated the incubation period, lesion profile and PrPSc profile induced by well-defined sheep scrapie isolates, bovine spongiform encephalopathy (BSE) and ovine BSE after intracerebral inoculation into two lines of ovine PrP (both ARQ/ARQ) overexpressing transgenic mice (Tgshp IX and Tgshp XI). All isolates were transmitted to both mouse models with an attack rate of almost 100%, but genotype-dependent differences became obvious between the ARQ and VRQ isolates. Surprisingly, BSE induced a much longer incubation period in Tgshp XI compared to Tgshp IX. In contrast to the histopathological lesion profiles, the immunohistochemical PrPSc profiles revealed discriminating patterns in certain brain regions in both models with clear differentiation of both BSE isolates from scrapie. These data provide the basis for the use of Tgshp IX and XI mice in the characterization of TSE isolates. Furthermore, the results enable a deeper appreciation of TSE strain diversity using ovine PrP overexpressing transgenic mice as a biological prion strain typing approach.
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Affiliation(s)
- Olanrewaju I. Fatola
- Neurosience Unit, Department of Veterinary Anatomy, University of Ibadan, Ibadan 200005, Nigeria; (O.I.F.); (J.O.)
- Friedrich-Loeffler-Institut, Institute of Novel and Emerging Infectious Diseases, 17493 Isle of Riems, Germany; (M.K.); (A.B.-B.); (M.H.G.)
| | - Markus Keller
- Friedrich-Loeffler-Institut, Institute of Novel and Emerging Infectious Diseases, 17493 Isle of Riems, Germany; (M.K.); (A.B.-B.); (M.H.G.)
| | - Anne Balkema-Buschmann
- Friedrich-Loeffler-Institut, Institute of Novel and Emerging Infectious Diseases, 17493 Isle of Riems, Germany; (M.K.); (A.B.-B.); (M.H.G.)
| | - James Olopade
- Neurosience Unit, Department of Veterinary Anatomy, University of Ibadan, Ibadan 200005, Nigeria; (O.I.F.); (J.O.)
| | - Martin H. Groschup
- Friedrich-Loeffler-Institut, Institute of Novel and Emerging Infectious Diseases, 17493 Isle of Riems, Germany; (M.K.); (A.B.-B.); (M.H.G.)
| | - Christine Fast
- Friedrich-Loeffler-Institut, Institute of Novel and Emerging Infectious Diseases, 17493 Isle of Riems, Germany; (M.K.); (A.B.-B.); (M.H.G.)
- Correspondence: ; Tel.: +49-38351-7-1274
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Fokoua AR, Ajayi AM, Ben-Azu B, Chouna R, Folarin O, Olopade J, Nkeng-Efouet PA, Aderibigbe AO, Umukoro S, Nguelefack TB. The antioxidant and neuroprotective effects of the Psychotria camptopus Verd. Hook. (Rubiaceae) stem bark methanol extract contributes to its antiepileptogenic activity against pentylenetetrazol kindling in male Wistar rats. Metab Brain Dis 2021; 36:2015-2027. [PMID: 34460047 DOI: 10.1007/s11011-021-00825-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 08/14/2021] [Indexed: 10/20/2022]
Abstract
A substantial number of epileptic patients are resistant to the current medication thus necessitating the search for alternative therapies for intractable forms of the disease. Previous studies demonstrated the acute anticonvulsant properties of the methanol extract of the stem bark of Psychotria camptopus (MEPC) in rats. This study investigated the effects of MEPC on pentylenetetrazole-kindled Wistar rats. Kindling was induced by intraperitoneal injection of pentylenetetrazole (37.5 mg/kg) on every alternate day, 1 h after each daily oral pretreatment of rats (8 ≤ n ≤ 10) with MEPC (40, 80 and 120 mg/kg), vehicle or diazepam (3 mg/kg) for 43 days. The kindling development was monitored based on seizure episodes and severity. Rats' brains were collected on day 43 for the determination of oxidative stress parameters. The histomorphological features and neuronal cell viability of the prefrontal cortex (PFC) and hippocampus were also assessed using H&E and Cresyl violet stains. Chronic administration of pentylenetetrazole time-dependently decreased the latency to myoclonic and generalized seizures, and increased seizure scores and the number of kindled rats. MEPC and diazepam significantly increased the latencies to myoclonic jerks and generalized tonic-clonic seizures. These substances also reduced seizure score and the number of rats with PTZ-kindling. MEPC improved glutathione status and decreased lipid peroxidation in the brains of kindled rats. MEPC also exhibited neuroprotection against pentylenetetrazole-induced hippocampal and PFC neuronal damages. These results suggest that P. camptopus has antiepileptogenic activity, which might be related to the augmentation of antioxidant and neuroprotective defense mechanisms, and further confirm its usefulness in the management of epilepsy.
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Affiliation(s)
- Aliance Romain Fokoua
- Laboratory of Animal Physiology and Phytopharmacology, Faculty of Sciences, University of Dschang, Dschang, Cameroon
- Fondation Alango-Reference Hospital of African medicine, Dschang, Cameroon
| | - Abayomi Mayowa Ajayi
- Neuropharmacology Laboratory, Department of Pharmacology and Therapeutics, Faculty of Basic Medical Sciences, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Benneth Ben-Azu
- Neuropharmacology Laboratory, Department of Pharmacology and Therapeutics, Faculty of Basic Medical Sciences, College of Medicine, University of Ibadan, Ibadan, Nigeria
- Department of Pharmacology and Therapeutics, Faculty of Basic Medical Sciences, College of Medicine, Delta State University, Abraka, Nigeria
| | - Rodolphe Chouna
- Fondation Alango-Reference Hospital of African medicine, Dschang, Cameroon
- Laboratory of Applied and Environmental Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Oluwabusayo Folarin
- Neuroscience Unit, Department of Veterinary Anatomy, University of Ibadan, Ibadan, Nigeria
| | - James Olopade
- Neuroscience Unit, Department of Veterinary Anatomy, University of Ibadan, Ibadan, Nigeria
| | - Pepin Alango Nkeng-Efouet
- Fondation Alango-Reference Hospital of African medicine, Dschang, Cameroon
- Laboratory of Applied and Environmental Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Adegbuyi Oladele Aderibigbe
- Neuropharmacology Laboratory, Department of Pharmacology and Therapeutics, Faculty of Basic Medical Sciences, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Solomon Umukoro
- Neuropharmacology Laboratory, Department of Pharmacology and Therapeutics, Faculty of Basic Medical Sciences, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Télesphore Benoît Nguelefack
- Laboratory of Animal Physiology and Phytopharmacology, Faculty of Sciences, University of Dschang, Dschang, Cameroon.
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Hartlaub J, Daodu OB, Sadeghi B, Keller M, Olopade J, Oluwayelu D, Groschup MH. Cross-Reaction or Co-Infection? Serological Discrimination of Antibodies Directed against Dugbe and Crimean-Congo Hemorrhagic Fever Orthonairovirus in Nigerian Cattle. Viruses 2021; 13:1398. [PMID: 34372604 PMCID: PMC8310240 DOI: 10.3390/v13071398] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/14/2021] [Accepted: 07/15/2021] [Indexed: 11/16/2022] Open
Abstract
Dugbe orthonairovirus (DUGV) and Crimean-Congo hemorrhagic fever orthonairovirus (CCHFV) are tick-borne arboviruses within the order Bunyavirales. Both viruses are endemic in several African countries and can induce mild (DUGV, BSL 3) or fatal (CCHFV, BSL 4) disease in humans. Ruminants play a major role in their natural transmission cycle. Therefore, they are considered as suitable indicator animals for serological monitoring studies to assess the risk for human infections. Although both viruses do not actually belong to the same serogroup, cross-reactivities have already been reported earlier-hence, the correct serological discrimination of DUGV and CCHFV antibodies is crucial. In this study, 300 Nigerian cattle sera (150 CCHFV seropositive and seronegative samples, respectively) were screened for DUGV antibodies via N protein-based ELISA, indirect immunofluorescence (iIFA) and neutralization assays. Whereas no correlation between the CCHFV antibody status and DUGV seroprevalence data could be demonstrated with a newly established DUGV ELISA, significant cross-reactivities were observed in an immunofluorescence assay. Moreover, DUGV seropositive samples did also cross-react in a species-adapted commercial CCHFV iIFA. Therefore, ELISAs seem to be able to reliably differentiate between DUGV and CCHFV antibodies and should preferentially be used for monitoring studies. Positive iIFA results should always be confirmed by ELISAs.
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Affiliation(s)
- Julia Hartlaub
- Institute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Suedufer 10, 17489 Greifswald–Insel Riems, Germany; (J.H.); (B.S.); (M.K.)
| | - Oluwafemi B. Daodu
- Department of Veterinary Microbiology, University of Ilorin, Ilorin 240103, Nigeria;
| | - Balal Sadeghi
- Institute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Suedufer 10, 17489 Greifswald–Insel Riems, Germany; (J.H.); (B.S.); (M.K.)
| | - Markus Keller
- Institute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Suedufer 10, 17489 Greifswald–Insel Riems, Germany; (J.H.); (B.S.); (M.K.)
| | - James Olopade
- Department of Veterinary Anatomy, University of Ibadan, Ibadan 200284, Nigeria;
| | - Daniel Oluwayelu
- Department of Veterinary Microbiology, University of Ibadan, Ibadan 200281, Nigeria;
| | - Martin H. Groschup
- Institute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Suedufer 10, 17489 Greifswald–Insel Riems, Germany; (J.H.); (B.S.); (M.K.)
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Adejumobi O, Jubril A, Afolabi J, Omobowale T, Olopade J. Comparative Study of Diminazene Aceturate in Trypanosomiasis Therapy in Nigerian Local Dogs Using Intramuscular and Intravenous Routes of Administration. AJVS 2021. [DOI: 10.5455/ajvs.24664] [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: 11/03/2022] Open
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Mustapha O, Ezekiel O, Olaolorun F, Awala-Ajakaiye M, Popoola E, Olude M, Olopade J. Morphological Characterization of the Developing Greater Cane Rat (Thryonomys swinderianus) Brain. Dev Neurosci 2020; 42:114-123. [PMID: 33321497 DOI: 10.1159/000510848] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 04/20/2020] [Accepted: 08/09/2020] [Indexed: 11/19/2022] Open
Abstract
Developmental mode along the altricial-precocial spectrum is well known to be influenced by brain development and maturation. The greater cane rat (GCR) is an indigenous precocial African rodent with uncommon phenotypes and life traits. This study was therefore designed to characterize and describe distinctive external developmental features in the prenatal GCR brain across the entire gestational length using the emergence and differentiation of external features of the brain vesicles. Four gross morphometric brain parameters (weight, length, width, and height) were evaluated and expressed as mean ± SEM. Relationship between all brain morphometrics and gestation length were analyzed using one-way ANOVA and linear regression. Developmental milestones in the prenatal GCR were then compared with closely related precocial mammals. The earliest time point with gross observable features in the prenatal GCR brain was at gestation day (GD) 60. The period with the most remarkable gross developmental features was noted between GD80 and GD100. Some of these gross features include differentiation of the cerebellar plate into vermis and lateral lobes, emergence of the piriform lobes, mammillary bodies, colliculi bodies, cerebral peduncles, and primordial pons. By GD130, most gross topographic neural features were already established. Cerebellar lobation and patterning at GD130 were the last recognizable gross developmental features noticed in the prenatal GCR brain. This coincided with the time of first eye opening in the GCR fetus. The developmental pattern observed in the prenatal GCR brain is similar to those noted in precocial rodent like the guinea pig. However, the onset of these milestones was delayed, and their duration was relatively shorter in the GCR. This study provides a frame of baseline reference of morphological brain features in the GCR embryos and fetuses that will be useful for fetal age estimation, for home grown neurodevelopmental and eco-toxicological studies, as this rodent is being proposed as a research model.
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Affiliation(s)
- Oluwaseun Mustapha
- Neuroscience Unit, Department of Veterinary Anatomy, College of Veterinary Medicine, Federal University of Agriculture, Abeokuta, Nigeria.,Neuroscience Unit, Department of Veterinary Anatomy, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Oluwaseun Ezekiel
- Neuroscience Unit, Department of Veterinary Anatomy, College of Veterinary Medicine, Federal University of Agriculture, Abeokuta, Nigeria
| | - Francis Olaolorun
- Neuroscience Unit, Department of Veterinary Anatomy, College of Veterinary Medicine, Federal University of Agriculture, Abeokuta, Nigeria.,Neuroscience Unit, Department of Veterinary Anatomy, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Michael Awala-Ajakaiye
- Neuroscience Unit, Department of Veterinary Anatomy, College of Veterinary Medicine, Federal University of Agriculture, Abeokuta, Nigeria
| | - Eniola Popoola
- Neuroscience Unit, Department of Veterinary Anatomy, College of Veterinary Medicine, Federal University of Agriculture, Abeokuta, Nigeria
| | - Matthew Olude
- Neuroscience Unit, Department of Veterinary Anatomy, College of Veterinary Medicine, Federal University of Agriculture, Abeokuta, Nigeria
| | - James Olopade
- Neuroscience Unit, Department of Veterinary Anatomy, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria,
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Ohiomokhare S, Olaolorun F, Ladagu A, Olopade F, Howes MJR, Okello E, Olopade J, Chazot PL. The Pathopharmacological Interplay between Vanadium and Iron in Parkinson's Disease Models. Int J Mol Sci 2020; 21:E6719. [PMID: 32937783 PMCID: PMC7554808 DOI: 10.3390/ijms21186719] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 09/05/2020] [Accepted: 09/08/2020] [Indexed: 11/16/2022] Open
Abstract
Parkinson's disease (PD) pathology is characterised by distinct types of cellular defects, notably associated with oxidative damage and mitochondria dysfunction, leading to the selective loss of dopaminergic neurons in the brain's substantia nigra pars compacta (SNpc). Exposure to some environmental toxicants and heavy metals has been associated with PD pathogenesis. Raised iron levels have also been consistently observed in the nigrostriatal pathway of PD cases. This study explored, for the first time, the effects of an exogenous environmental heavy metal (vanadium) and its interaction with iron, focusing on the subtoxic effects of these metals on PD-like oxidative stress phenotypes in Catecholaminergic a-differentiated (CAD) cells and PTEN-induced kinase 1 (PINK-1)B9Drosophila melanogaster models of PD. We found that undifferentiated CAD cells were more susceptible to vanadium exposure than differentiated cells, and this susceptibility was modulated by iron. In PINK-1 flies, the exposure to chronic low doses of vanadium exacerbated the existing motor deficits, reduced survival, and increased the production of reactive oxygen species (ROS). Both Aloysia citrodora Paláu, a natural iron chelator, and Deferoxamine Mesylate (DFO), a synthetic iron chelator, significantly protected against the PD-like phenotypes in both models. These results favour the case for iron-chelation therapy as a viable option for the symptomatic treatment of PD.
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Affiliation(s)
- Samuel Ohiomokhare
- Department of Biosciences, Durham University, County Durham DH1 3LE, UK; (S.O.); (F.O.); (A.L.)
| | - Francis Olaolorun
- Department of Biosciences, Durham University, County Durham DH1 3LE, UK; (S.O.); (F.O.); (A.L.)
- Department of Veterinary Anatomy, University of Ibadan, Ibadan 200284, Nigeria;
| | - Amany Ladagu
- Department of Biosciences, Durham University, County Durham DH1 3LE, UK; (S.O.); (F.O.); (A.L.)
- Department of Veterinary Anatomy, University of Ibadan, Ibadan 200284, Nigeria;
| | - Funmilayo Olopade
- Department of Anatomy, College of Medicine, University of Ibadan, Ibadan 200284, Nigeria;
| | - Melanie-Jayne R. Howes
- Natural Capital and Plant Health Department, Royal Botanic Gardens Kew, Surrey TW9 3DS, UK;
| | - Edward Okello
- Human Nutrition Research Centre, Population Health Sciences Institute, Faculty of Medical Sciences, Newcastle University, Tyne and Wear NE1 7RU, UK;
| | - James Olopade
- Department of Veterinary Anatomy, University of Ibadan, Ibadan 200284, Nigeria;
| | - Paul L. Chazot
- Department of Biosciences, Durham University, County Durham DH1 3LE, UK; (S.O.); (F.O.); (A.L.)
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Adebiyi O, Adigun K, Folarin O, Olopade J, Olayemi F. Administration of ethanolic extract of Erythrophleum ivorense (A Chev.) stem bark to male Wistar rats alters brain areas involved in motor coordination, behavior, and memory. J Ethnopharmacol 2020; 253:112650. [PMID: 32035221 DOI: 10.1016/j.jep.2020.112650] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 01/08/2020] [Accepted: 02/02/2020] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Erythrophleum ivorense (A Chev.) is a common plant in the tropics. Its use as ordeal poison in folklore medicine is controversial. The incoordination and behavioral changes following consumption are often associated with guilt. This study is aimed at dispelling or upholding this belief by investigating the actions of E. ivorense on the brain and behavior using rat model. MATERIALS AND METHODS Sixty male Wistar rats were equally divided into five groups; control group received distilled water, test groups were administered 10, 20, 30 and 40 mg/kg ethanolic extract of E. ivorense in a daily oral dose for 28 days. Cognition (Morris water maze) depression (forced swim test), motor function (hanging wire and inverted wire mesh grid grip tests) and exploratory assessments were done. Brains were stained with H&E, Cresyl violet and immunohistochemistry was done using GFAP, anticalbindin-D28k, Iba-1 and MBP antibodies. RESULTS At all doses, E. ivorense significantly (P ≤ 0.05) increased escape latency in the Morris water maze compared to control. Forced swim test showed a dose-related increase in duration of immobility, significant reduction in hanging latency in hanging wire and wire mesh grid grip test was also observed. Depletion of Purkinje cells of the cerebellum and hippocampal neurons was observed with H&E and cresyl violet. Immuno-staining revealed astrocytic activation in the cerebellum, loss of dendritic spines, cortical microglial activation and demyelination in the cerebellum and dentate gyrus of the hippocampus. CONCLUSION The ethanolic extract of E. ivorense stem bark caused a dose-dependent deficit in learning, memory and motor coordination with evidences of depression in rats. It is concluded that the plant is neurotoxic and induce several neurobehavioral changes.
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Affiliation(s)
- Olamide Adebiyi
- Department of Veterinary Physiology and Biochemistry, University of Ibadan, Nigeria.
| | - Kabirat Adigun
- Department of Veterinary Physiology and Biochemistry, University of Ibadan, Nigeria
| | | | - James Olopade
- Department of Veterinary Anatomy, University of Ibadan, Nigeria
| | - Funsho Olayemi
- Department of Veterinary Physiology and Biochemistry, University of Ibadan, Nigeria
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Adebiyi O, Obisesan A, Olayemi F, Olopade J. Protective effect of ethanolic extract of Grewia carpinifolia leaves on vanadium induced toxicity. AJVS 2015. [DOI: 10.5455/ajvs.189645] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Mustapha O, Oke B, Offen N, Sirén AL, Olopade J. Neurobehavioral and cytotoxic effects of vanadium during oligodendrocyte maturation: a protective role for erythropoietin. Environ Toxicol Pharmacol 2014; 38:98-111. [PMID: 24927405 DOI: 10.1016/j.etap.2014.05.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 05/01/2014] [Accepted: 05/02/2014] [Indexed: 06/03/2023]
Abstract
Vanadium exposure has been known to lead to lipid peroxidation, demyelination and oligodendrocytes depletion. We investigated behaviour and glial reactions in juvenile mice after early neonatal exposure to vanadium, and examined the direct effects of vanadium in oligodendrocyte progenitor cultures from embryonic mice. Neonatal pups exposed to vanadium via lactation for 15 and 22 days all had lower body weights. Behavioural tests showed in most instances a reduction in locomotor activity and negative geotaxis. Brain analyses revealed astrocytic activation and demyelination in the vanadium exposed groups compared to the controls. In cell culture, exposure of oligodendrocytes to 300 μM sodium metavanadate significantly increased cell death. Expression of the oligodendrocyte specific proteins, 2',3'-cyclic nucleotide 3'-phosphodiesterase (CNPase) and oligodendrocyte specific protein (OSP/Claudin) were reduced upon vanadium treatment while simultaneous administration of erythropoietin (EPO; 4-12 U/ml) counteracted vanadium-toxicity. The data suggest that oligodendrocyte damage may explain the increased vulnerability of the juvenile brain to vanadium and support a potential for erythropoietin as a protective agent against vanadium-toxicity during perinatal brain development and maturation.
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Affiliation(s)
- Oluwaseun Mustapha
- Department of Veterinary Anatomy, University of Ibadan, Nigeria; Department of Veterinary Anatomy, Federal University of Agriculture, Abeokuta, Nigeria.
| | - Bankole Oke
- Department of Veterinary Anatomy, University of Ibadan, Nigeria.
| | - Nils Offen
- Department of Neurosurgery, University of Würzburg, Josef-Schneider Strasse 11, 97080 Würzburg, Germany.
| | - Anna-Leena Sirén
- Department of Neurosurgery, University of Würzburg, Josef-Schneider Strasse 11, 97080 Würzburg, Germany.
| | - James Olopade
- Department of Veterinary Anatomy, University of Ibadan, Nigeria; Department of Neurosurgery, University of Würzburg, Josef-Schneider Strasse 11, 97080 Würzburg, Germany.
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Yahaya A, Olopade J, Kwari H. Clinical Implications of Craniometric Indices of the One-Humped Camel (Camelus dromedarius) to Oral Health and Clinical Regional Anaesthesia of the Head. ACTA ACUST UNITED AC 2011. [DOI: 10.21608/jva.2011.45166] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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