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Tandon A, Singh SJ, Chaturvedi RK. Nanomedicine against Alzheimer's and Parkinson's Disease. Curr Pharm Des 2021; 27:1507-1545. [PMID: 33087025 DOI: 10.2174/1381612826666201021140904] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 08/06/2020] [Accepted: 08/18/2020] [Indexed: 11/22/2022]
Abstract
Alzheimer's and Parkinson's are the two most rampant neurodegenerative disorders worldwide. Existing treatments have a limited effect on the pathophysiology but are unable to fully arrest the progression of the disease. This is due to the inability of these therapeutic molecules to efficiently cross the blood-brain barrier. We discuss how nanotechnology has enabled researchers to develop novel and efficient nano-therapeutics against these diseases. The development of nanotized drug delivery systems has permitted an efficient, site-targeted, and controlled release of drugs in the brain, thereby presenting a revolutionary therapeutic approach. Nanoparticles are also being thoroughly studied and exploited for their role in the efficient and precise diagnosis of neurodegenerative conditions. We summarize the role of different nano-carriers and RNAi-conjugated nanoparticle-based therapeutics for their efficacy in pre-clinical studies. We also discuss the challenges underlying the use of nanomedicine with a focus on their route of administration, concentration, metabolism, and any toxic effects for successful therapeutics in these diseases.
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Affiliation(s)
- Ankit Tandon
- Developmental Toxicology Laboratory, Systems Toxicology and Health Risk Assessment Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
| | - Sangh J Singh
- Developmental Toxicology Laboratory, Systems Toxicology and Health Risk Assessment Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
| | - Rajnish K Chaturvedi
- Developmental Toxicology Laboratory, Systems Toxicology and Health Risk Assessment Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
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2
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You L, Wang J, Liu T, Zhang Y, Han X, Wang T, Guo S, Dong T, Xu J, Anderson GJ, Liu Q, Chang YZ, Lou X, Nie G. Targeted Brain Delivery of Rabies Virus Glycoprotein 29-Modified Deferoxamine-Loaded Nanoparticles Reverses Functional Deficits in Parkinsonian Mice. ACS NANO 2018; 12:4123-4139. [PMID: 29617109 DOI: 10.1021/acsnano.7b08172] [Citation(s) in RCA: 124] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Excess iron deposition in the brain often causes oxidative stress-related damage and necrosis of dopaminergic neurons in the substantia nigra and has been reported to be one of the major vulnerability factors in Parkinson's disease (PD). Iron chelation therapy using deferoxamine (DFO) may inhibit this nigrostriatal degeneration and prevent the progress of PD. However, DFO shows very short half-life in vivo and hardly penetrates the blood brain barrier (BBB). Hence, it is of great interest to develop DFO formulations for safe and efficient intracerebral drug delivery. Herein, we report a polymeric nanoparticle system modified with brain-targeting peptide rabies virus glycoprotein (RVG) 29 that can intracerebrally deliver DFO. The nanoparticle system penetrates the BBB possibly through specific receptor-mediated endocytosis triggered by the RVG29 peptide. Administration of these nanoparticles significantly decreased iron content and oxidative stress levels in the substantia nigra and striatum of PD mice and effectively reduced their dopaminergic neuron damage and as reversed their neurobehavioral deficits, without causing any overt adverse effects in the brain or other organs. This DFO-based nanoformulation holds great promise for delivery of DFO into the brain and for realizing iron chelation therapy in PD treatment.
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Affiliation(s)
- Linhao You
- Laboratory of Molecular Iron Metabolism, College of Life Science , Hebei Normal University , Shijiazhuang , Hebei Province 050024 , China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , China
| | - Jing Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Tianqing Liu
- QIMR Berghofer Medical Research Institute , PO Royal Brisbane Hospital , Brisbane , QLD 4029 , Australia
| | - Yinlong Zhang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , China
- College of Pharmaceutical Science , Jilin University , Changchun 130021 , China
| | - Xuexiang Han
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Ting Wang
- Department of Radiology , The People's Liberation Army General Hospital , No. 28 Fuxing Road , Beijing 100853 , China
| | - Shanshan Guo
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Tianyu Dong
- Laboratory of Molecular Iron Metabolism, College of Life Science , Hebei Normal University , Shijiazhuang , Hebei Province 050024 , China
| | - Junchao Xu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Gregory J Anderson
- QIMR Berghofer Medical Research Institute , PO Royal Brisbane Hospital , Brisbane , QLD 4029 , Australia
| | - Qiang Liu
- Chinese Academy of Sciences Key Laboratory of Brain Function and Disease, and School of Life Sciences , University of Science and Technology of China , Hefei 230026 , China
| | - Yan-Zhong Chang
- Laboratory of Molecular Iron Metabolism, College of Life Science , Hebei Normal University , Shijiazhuang , Hebei Province 050024 , China
| | - Xin Lou
- Department of Radiology , The People's Liberation Army General Hospital , No. 28 Fuxing Road , Beijing 100853 , China
| | - Guangjun Nie
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
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Neural Stem Cell Transplantation Promotes Functional Recovery from Traumatic Brain Injury via Brain Derived Neurotrophic Factor-Mediated Neuroplasticity. Mol Neurobiol 2017; 55:2696-2711. [PMID: 28421542 DOI: 10.1007/s12035-017-0551-1] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 04/07/2017] [Indexed: 02/05/2023]
Abstract
Traumatic brain injury (TBI) induces cognitive impairments, motor and behavioral deficits. Previous evidences have suggested that neural stem cell (NSC) transplantation could facilitate functional recovery from brain insults, but their underlying mechanisms remains to be elucidated. Here, we established TBI model by an electromagnetic-controlled cortical impact device in the rats. Then, 5 μl NSCs (5.0 × 105/μl), derived from green fluorescent protein (GFP) transgenic mouse, was transplanted into the traumatic brain regions of rats at 24 h after injury. After differentiation of the NSCs was determined using immunohistochemistry, neurological severity scores (NSS) and rotarod test were conducted to detect the neurological behavior. Western blot and RT-PCR as well as ELASA were used to evaluate the expression of synaptophysin and brain-derived neurotrophic factor (BDNF). In order to elucidate the role of BDNF on the neural recovery after NSC transplantation, BDNF knockdown in NSC was performed and transplanted into the rats with TBI, and potential mechanism for BDNF knockdown in the NSC was analyzed using microassay analysis. Meanwhile, BDNF antibody blockade was conducted to further confirm the effect of BDNF on neural activity. As a result, an increasing neurological function improvement was seen in NSC transplanted rats, which was associated with the upregulation of synaptophysin and BDNF expression. Moreover, transplantation of BDNF knockdown NSCs and BDNF antibody block reduced not only the level of synaptophysin but also exacerbated neurological function deficits. Microassay analysis showed that 14 genes such as Wnt and Gsk3-β were downregulated after BDNF knockdown. The present data therefore showed that BDNF-mediated neuroplasticity underlie the mechanism of NSC transplantation for the treatment of TBI in adult rats.
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Pahuja R, Seth K, Shukla A, Shukla RK, Bhatnagar P, Chauhan LKS, Saxena PN, Arun J, Chaudhari BP, Patel DK, Singh SP, Shukla R, Khanna VK, Kumar P, Chaturvedi RK, Gupta KC. Trans-blood brain barrier delivery of dopamine-loaded nanoparticles reverses functional deficits in parkinsonian rats. ACS NANO 2015; 9:4850-71. [PMID: 25825926 DOI: 10.1021/nn506408v] [Citation(s) in RCA: 147] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Sustained and safe delivery of dopamine across the blood brain barrier (BBB) is a major hurdle for successful therapy in Parkinson's disease (PD), a neurodegenerative disorder. Therefore, in the present study we designed neurotransmitter dopamine-loaded PLGA nanoparticles (DA NPs) to deliver dopamine to the brain. These nanoparticles slowly and constantly released dopamine, showed reduced clearance of dopamine in plasma, reduced quinone adduct formation, and decreased dopamine autoxidation. DA NPs were internalized in dopaminergic SH-SY5Y cells and dopaminergic neurons in the substantia nigra and striatum, regions affected in PD. Treatment with DA NPs did not cause reduction in cell viability and morphological deterioration in SH-SY5Y, as compared to bulk dopamine-treated cells, which showed reduced viability. Herein, we report that these NPs were able to cross the BBB and capillary endothelium in the striatum and substantia nigra in a 6-hydroxydopamine (6-OHDA)-induced rat model of PD. Systemic intravenous administration of DA NPs caused significantly increased levels of dopamine and its metabolites and reduced dopamine-D2 receptor supersensitivity in the striatum of parkinsonian rats. Further, DA NPs significantly recovered neurobehavioral abnormalities in 6-OHDA-induced parkinsonian rats. Dopamine delivered through NPs did not cause additional generation of ROS, dopaminergic neuron degeneration, and ultrastructural changes in the striatum and substantia nigra as compared to 6-OHDA-lesioned rats. Interestingly, dopamine delivery through nanoformulation neither caused alterations in the heart rate and blood pressure nor showed any abrupt pathological change in the brain and other peripheral organs. These results suggest that NPs delivered dopamine into the brain, reduced dopamine autoxidation-mediated toxicity, and ultimately reversed neurochemical and neurobehavioral deficits in parkinsonian rats.
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Affiliation(s)
- Richa Pahuja
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
- §Academy of Scientific and Innovative Research (AcSIR), Delhi 110001, India
| | - Kavita Seth
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
| | - Anshi Shukla
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
| | - Rajendra Kumar Shukla
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
| | | | | | - Prem Narain Saxena
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
| | - Jharna Arun
- ∥CSIR-Central Drug Research Institute (CSIR-CDRI), Lucknow 226001, India
| | - Bhushan Pradosh Chaudhari
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
- §Academy of Scientific and Innovative Research (AcSIR), Delhi 110001, India
| | - Devendra Kumar Patel
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
- §Academy of Scientific and Innovative Research (AcSIR), Delhi 110001, India
| | - Sheelendra Pratap Singh
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
| | - Rakesh Shukla
- §Academy of Scientific and Innovative Research (AcSIR), Delhi 110001, India
- ∥CSIR-Central Drug Research Institute (CSIR-CDRI), Lucknow 226001, India
| | - Vinay Kumar Khanna
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
- §Academy of Scientific and Innovative Research (AcSIR), Delhi 110001, India
| | - Pradeep Kumar
- §Academy of Scientific and Innovative Research (AcSIR), Delhi 110001, India
| | - Rajnish Kumar Chaturvedi
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
- §Academy of Scientific and Innovative Research (AcSIR), Delhi 110001, India
| | - Kailash Chand Gupta
- †CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80 MG Marg, Lucknow 226001, India
- §Academy of Scientific and Innovative Research (AcSIR), Delhi 110001, India
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Sun G, Yuan Z, Zhang B, Jia Y, Ji Y, Ma X, Liu Y, Liu Y, Wen Q, Zhao Y. Gastrodin blocks neural stem cell differentiation into glial cells mediated by kainic acid. Neural Regen Res 2015; 7:891-5. [PMID: 25722671 PMCID: PMC4341282 DOI: 10.3969/j.issn.1673-5374.2012.12.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2011] [Accepted: 03/05/2012] [Indexed: 01/24/2023] Open
Abstract
Kainic acid can simulate excitatory amino acids in vitro. Neural stem cells, isolated from newborn Wistar rats, were cultured in vitro and exposed to 100–4 000 μM kainic acid for 7 days to induce neuronal cell differentiation, causing the number of astrocytes to be significantly increased. Treatment with a combination of 0.5 mg/L gastrodin and kainic acid also caused the number of differentiated neurons to be significantly increased compared with treatment with kainic acid alone. Experimental findings suggest that gastrodin reduces the excitability of kainic acid and induces neural stem cell differentiation into neurons.
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Affiliation(s)
- Guifang Sun
- Department of Neurology, the First Affiliated Hospital, Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Zhihao Yuan
- Department of Urology, the Third People's Hospital of Zhengzhou, Zhengzhou 450051, Henan Province, China
| | - Boai Zhang
- Department of Neurology, the First Affiliated Hospital, Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Yanjie Jia
- Department of Neurology, the First Affiliated Hospital, Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Yangfei Ji
- Department of Neurology, the First Affiliated Hospital, Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Xingrong Ma
- Department of Neurology, the First Affiliated Hospital, Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Yu Liu
- Department of Neurology, the First Affiliated Hospital, Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Yanru Liu
- Department of Neurology, the First Affiliated Hospital, Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Quanqing Wen
- Department of Neurology, the Central Hospital of Nanyang, Nanyang 473009, Henan Province, China
| | - Yanling Zhao
- Department of Neurology, the First Affiliated Hospital, Zhengzhou University, Zhengzhou 450052, Henan Province, China
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Tiwari SK, Agarwal S, Seth B, Yadav A, Ray RS, Mishra VN, Chaturvedi RK. Inhibitory Effects of Bisphenol-A on Neural Stem Cells Proliferation and Differentiation in the Rat Brain Are Dependent on Wnt/β-Catenin Pathway. Mol Neurobiol 2014; 52:1735-1757. [PMID: 25381574 DOI: 10.1007/s12035-014-8940-1] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Accepted: 10/13/2014] [Indexed: 02/07/2023]
Abstract
Neurogenesis, a process of generation of new neurons, occurs throughout the life in the hippocampus and sub-ventricular zone (SVZ). Bisphenol-A (BPA), an endocrine disrupter used as surface coating for packaged food cans, injures the developing and adult brain. However, the effects of BPA on neurogenesis and underlying cellular and molecular mechanism(s) are still unknown. Herein, we studied the effect(s) of prenatal and early postnatal exposure of low dose BPA on Wnt/β-catenin signaling pathway that controls different steps of neurogenesis such as neural stem cell (NSC) proliferation and neuronal differentiation. Pregnant rats were treated with 4, 40, and 400 μg BPA/kg body weight orally daily from gestational day 6 to postnatal day 21. Both in vivo and in vitro studies showed that BPA alters NSC proliferation and differentiation. BPA impaired NSC proliferation (5'-bromo-2'-deoxyuridine (BrdU(+)) and nestin(+) cells) and neuronal differentiation (BrdU/doublecortin(+) and BrdU/neuronal nuclei (NeuN(+)) cells) in the hippocampus and SVZ as compared to control. It significantly altered expression/protein levels of neurogenic genes and the Wnt pathway genes in the hippocampus. BPA reduced cellular β-catenin and p-GSK-3β levels and decreased β-catenin nuclear translocation, and cyclin-D1 and TCF/LEF promoter luciferase activity. Specific activation and blockage of the Wnt pathway suggested involvement of this pathway in BPA-mediated inhibition of neurogenesis. Further, blockage of GSK-3β activity by SB415286 and GSK-3β small interfering RNA (siRNA) attenuated BPA-induced downregulation of neurogenesis. Overall, these results suggest significant inhibitory effects of BPA on NSC proliferation and differentiation in the rat via the Wnt/β-catenin signaling pathway.
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Affiliation(s)
- Shashi Kant Tiwari
- Developmental Toxicology Division, Systems Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80-MG Marg, Lucknow, Uttar Pradesh, India.,Academy of Scientific and Innovative Research (AcSIR), New Delhi, India
| | - Swati Agarwal
- Developmental Toxicology Division, Systems Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80-MG Marg, Lucknow, Uttar Pradesh, India.,Academy of Scientific and Innovative Research (AcSIR), New Delhi, India
| | - Brashket Seth
- Developmental Toxicology Division, Systems Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80-MG Marg, Lucknow, Uttar Pradesh, India.,Academy of Scientific and Innovative Research (AcSIR), New Delhi, India
| | - Anuradha Yadav
- Developmental Toxicology Division, Systems Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80-MG Marg, Lucknow, Uttar Pradesh, India.,Academy of Scientific and Innovative Research (AcSIR), New Delhi, India
| | - Ratan Singh Ray
- Academy of Scientific and Innovative Research (AcSIR), New Delhi, India.,Photobiology Division, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80-MG Marg, Lucknow, Uttar Pradesh, India
| | - Vijay Nath Mishra
- Department of Neurology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Rajnish Kumar Chaturvedi
- Developmental Toxicology Division, Systems Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), 80-MG Marg, Lucknow, Uttar Pradesh, India. .,Academy of Scientific and Innovative Research (AcSIR), New Delhi, India.
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7
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mGluR5 promotes the differentiation of rat neural progenitor cells into cholinergic neurons and activation of extracellular signal-related protein kinases. Neuroreport 2014; 25:427-34. [DOI: 10.1097/wnr.0000000000000134] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Tiwari MN, Agarwal S, Bhatnagar P, Singhal NK, Tiwari SK, Kumar P, Chauhan LKS, Patel DK, Chaturvedi RK, Singh MP, Gupta KC. Nicotine-encapsulated poly(lactic-co-glycolic) acid nanoparticles improve neuroprotective efficacy against MPTP-induced parkinsonism. Free Radic Biol Med 2013; 65:704-718. [PMID: 23933227 DOI: 10.1016/j.freeradbiomed.2013.07.042] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Revised: 07/02/2013] [Accepted: 07/31/2013] [Indexed: 11/24/2022]
Abstract
For some instances of Parkinson disease (PD), current evidence in the literature is consistent with reactive oxygen species being involved in the etiology of the disease. The management of PD is still challenging owing to its ambiguous etiology and lack of permanent cure. Because nicotine offers neuroprotection against 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced parkinsonism, the neuroprotective efficacy of nicotine-encapsulated poly(lactic-co-glycolic) acid (PLGA) nanoparticles and the underlying mechanism of improved efficacy, if any, over bulk nicotine were assessed in this study. The selected indicators of oxidative stress, dopaminergic neurodegeneration and apoptosis, were measured in both in vitro and rodent models of parkinsonism in the presence or absence of "nanotized" or bulk nicotine. The levels of dopamine and its metabolites were measured in the striatum, nicotine and its metabolite in the nigrostriatal tissues while the immunoreactivities of tyrosine hydroxylase (TH), metallothionein-III (MT-III), inducible nitric oxide synthase (iNOS) and microglial activation were checked in the substantia nigra of controls and treated mice. GSTA4-4, heme oxygenase (HO)-1, tumor suppressor protein 53 (p53), caspase-3, lipid peroxidation (LPO), and nitrite levels were measured in the nigrostriatal tissues. Nicotine-encapsulated PLGA nanoparticles improved the endurance of TH-immunoreactive neurons and the number of fiber outgrowths and increased the mRNA expression of TH, neuronal cell adhesion molecule, and growth-associated protein-43 over bulk against 1-methyl-4-phenyl pyridinium ion-induced degeneration in the in vitro model. MPTP reduced TH immunoreactivity and levels of dopamine and its metabolites and increased microglial activation, expression of GSTA4-4, iNOS, MT-III, HO-1, p53, and caspase-3, and levels of nitrite and LPO. Whereas both bulk nicotine and nicotine-encapsulated PLGA nanoparticles modulated the changes toward controls, the modulation was more pronounced in nicotine-encapsulated PLGA nanoparticle-treated parkinsonian mice. The levels of nicotine and cotinine were elevated in nicotine-encapsulated PLGA nanoparticle-treated PD mouse brain compared with bulk. The results obtained from this study demonstrate that nanotization of nicotine improves neuroprotective efficacy by enhancing its bioavailability and subsequent modulation in the indicators of oxidative stress and apoptosis.
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Affiliation(s)
| | - Swati Agarwal
- CSIR-Indian Institute of Toxicology Research, Lucknow 226 001, UP, India; Academy of Scientific and Innovative Research (AcSIR), India
| | - Priyanka Bhatnagar
- CSIR-Institute of Genomics and Integrative Biology, CSIR, Delhi 110 007, India
| | | | - Shashi Kant Tiwari
- CSIR-Indian Institute of Toxicology Research, Lucknow 226 001, UP, India; Academy of Scientific and Innovative Research (AcSIR), India
| | - Pradeep Kumar
- CSIR-Institute of Genomics and Integrative Biology, CSIR, Delhi 110 007, India
| | | | | | - Rajnish Kumar Chaturvedi
- CSIR-Indian Institute of Toxicology Research, Lucknow 226 001, UP, India; Academy of Scientific and Innovative Research (AcSIR), India.
| | | | - Kailash Chand Gupta
- CSIR-Indian Institute of Toxicology Research, Lucknow 226 001, UP, India; CSIR-Institute of Genomics and Integrative Biology, CSIR, Delhi 110 007, India.
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9
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Zhao L, Jiao Q, Chen X, Yang P, Zhao B, Zheng P, Liu Y. mGluR5 is involved in proliferation of rat neural progenitor cells exposed to hypoxia with activation of mitogen-activated protein kinase signaling pathway. J Neurosci Res 2011; 90:447-60. [PMID: 22034224 DOI: 10.1002/jnr.22751] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Revised: 06/22/2011] [Accepted: 06/28/2011] [Indexed: 11/08/2022]
Abstract
Hypoxia/ischemia induces proliferation of neural progenitor cells (NPCs) in rodent and human brain; however, the mechanisms remain unknown. We investigated the effects of metabotropic glutamate receptor 5 (mGluR5) on NPC proliferation under hypoxia, the expression of cyclin D1, and the activation of the mitogen-activated protein kinases (MAPKs) signaling pathway in cell culture. The results showed that hypoxia induced mGluR5 expression on NPCs in vitro. Under hypoxia, the mGluR5 agonists DHPG and CHPG significantly increased NPC proliferation in cell activity, diameter of neurospheres, bromodeoxyuridine (BrdU) incorporation and cell division, and expression of cyclin D1, with decreasing cell death. The mGluR5 siRNA and antagonist MPEP decreased the NPC proliferation and expression of cyclin D1, with increasing cell death. Phosphorylated JNK and ERK increased with the proliferation of NPCs after DHPG and CHPG treatment under hypoxia, while p-p38 level decreased. These results demonstrate that the expression of mGluR5 was upregulated during the proliferation of rat NPCs stimulated by hypoxia in vitro. The activation of the ERK and JNK signaling pathway and the expression of cyclin D1 were increased in this process. These finding suggest the involvement of mGluR5 in rat NPC proliferation and provide a target molecule in neural repair after ischemia/hypoxia injury of CNS.
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Affiliation(s)
- Lingyu Zhao
- Institute of Neurobiology, Environment and Genes Related to Diseases Key Laboratory of Education Ministry, Xi'an Jiaotong University College of Medicine, Xi'an, China
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10
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Zhao L, Jiao Q, Yang P, Chen X, Zhang J, Zhao B, Zheng P, Liu Y. Metabotropic glutamate receptor 5 promotes proliferation of human neural stem/progenitor cells with activation of mitogen-activated protein kinases signaling pathway in vitro. Neuroscience 2011; 192:185-94. [PMID: 21723923 DOI: 10.1016/j.neuroscience.2011.06.044] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Revised: 06/10/2011] [Accepted: 06/15/2011] [Indexed: 01/19/2023]
Abstract
Metabotropic glutamate receptors (mGluRs) regulate neurogenesis in brain, but the mechanisms remain unknown. In this study, we investigated the effect of mGluR5 on the proliferation of human embryonic neural stem/progenitor cells (NPCs), the expression of cyclin D1 and the activation of signaling pathways of mitogen-activated protein kinases (MAPKs). Results showed that mGluR5 agonist (S)-3,5-dihydroxyphenylglycine hydrate (DHPG) increased the proliferation of NPCs by increasing cell activity, diameter of neurospheres and cell division, while mGluR5 siRNA and antagonist 6-methyl-2-(phenylethynyl) pyridine hydrochloride (MPEP) decreased the NPC proliferation. The mRNA and protein expressions of cyclin D1 increased with DHPG treatment and decreased after siRNA or MPEP treatment. It was also found that activation of extracellular signal-regulated protein kinase (ERK) and c-Jun N-terminal protein kinase (JNK) signaling pathways were involved in the proliferation of NPCs. After DHPG treatment, p-ERK1/2 and p-JNK2 levels increased, and meanwhile p-p38 level decreased; but p-ERK1/2 and p-JNK2 levels decreased after siRNA or MPEP treatment, and p-p38 level increased. Our findings demonstrated that mGluR5 promoted the proliferation of human embryonic cortical NPCs and increased cyclin D1 expression with the changes in phosphorylation of MAPKs signaling pathways in vitro, suggesting a novel mechanism for pharmacological study of treatment for ischemic brain injury and neurodegenerative disorders.
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Affiliation(s)
- L Zhao
- Institute of Neurobiology, Environment and Genes Related to Diseases Key Laboratory of Education Ministry, Xi'an Jiaotong University College of Medicine, 710061, PR China
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Shukla S, Chaturvedi RK, Seth K, Roy NS, Agrawal AK. Enhanced survival and function of neural stem cells-derived dopaminergic neurons under influence of olfactory ensheathing cells in parkinsonian rats. J Neurochem 2009; 109:436-51. [DOI: 10.1111/j.1471-4159.2009.05983.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Morphophysiology of the Zuckerkandl's paraganglion: effects of dexamethasone and aging. Neurobiol Aging 2009; 31:2115-27. [PMID: 19167134 DOI: 10.1016/j.neurobiolaging.2008.12.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2008] [Revised: 11/26/2008] [Accepted: 12/02/2008] [Indexed: 11/23/2022]
Abstract
The extra-adrenal Zuckerkandl's paraganglion is used as a source of chromaffin cells for transplantation in parkinsonian animals. Aging can affect its viability, and this tissue needs further characterization for improving grafting procedures. The objectives were: (i) to compare the main morpho-functional characteristics of prepubertal and old Zuckerkandl's paraganglion (ZP), and (ii) to discern phenotypic changes after sub-chronic dexamethasone treatment in extra-adrenal tissue of prepubertal rats. For these purposes, immunostaining methods, stereology, voltammetry, cell culture, Western blotting, and ELISA were employed. The findings revealed that all paraganglia were composed of mesenchymal tissue and chromaffin cells. In prepubertal rats, chromaffin cells are arranged as large or small clusters. Large clusters (also known as "cell nests") contain densely packed chromaffin cells, and they are seen as fascicles in longitudinal sections. In old paraganglia, cell nests disappear, and chromaffin cells are found to be arranged as small cell clusters or dispersed throughout the mesenchyma. Paraganglionic chromaffin cells possess a rounded morphology with diameter ranging from 12 to 15 μm, with intracytoplasmic granules (100-500 nm in diameter) containing catecholamines. Prepubertal and old ZP chromaffin cells are mostly noradrenergics, and a few of them are dopaminergics. Aging reduces the amount of chromaffin tissue (28% in adult rats vs. 11% in old animals, both in relation to total volume of the paraganglion), and induces the presence of adrenergic cells and adrenaline. Both prepubertal and old cells express the neurotrophic factors GDNF and TGF-β₁, aging leading to reduced levels of both growth factors. Dexamethasone (50 μg/kg daily, 5 days) leads to the expression of phenylethanolamine-N-methyl-transferase in prepubertal paraganglia, and to a higher content and release of adrenaline.
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Srivastava N, Seth K, Khanna V, Ansari R, Agrawal A. Long‐term functional restoration by neural progenitor cell transplantation in rat model of cognitive dysfunction: co‐transplantation with olfactory ensheathing cells for neurotrophic factor support. Int J Dev Neurosci 2008; 27:103-10. [DOI: 10.1016/j.ijdevneu.2008.08.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2008] [Revised: 08/04/2008] [Accepted: 08/04/2008] [Indexed: 10/21/2022] Open
Affiliation(s)
- N. Srivastava
- Developmental Toxicology DivisionIndian Institute of Toxicology ResearchMahatma Gandhi Marg, Post Box 80Lucknow226001India
| | - K. Seth
- Developmental Toxicology DivisionIndian Institute of Toxicology ResearchMahatma Gandhi Marg, Post Box 80Lucknow226001India
| | - V.K. Khanna
- Developmental Toxicology DivisionIndian Institute of Toxicology ResearchMahatma Gandhi Marg, Post Box 80Lucknow226001India
| | - R.W. Ansari
- Developmental Toxicology DivisionIndian Institute of Toxicology ResearchMahatma Gandhi Marg, Post Box 80Lucknow226001India
| | - A.K. Agrawal
- Developmental Toxicology DivisionIndian Institute of Toxicology ResearchMahatma Gandhi Marg, Post Box 80Lucknow226001India
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