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Ali J, Khan A, Park JS, Tahir M, Ahmad W, Choe K, Kim MO. Neuroprotective Effects of N-methyl-(2S, 4R)-trans-4-hydroxy-L-proline (NMP) against Amyloid-β-Induced Alzheimer's Disease Mouse Model. Nutrients 2023; 15:4986. [PMID: 38068844 PMCID: PMC10708322 DOI: 10.3390/nu15234986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Revised: 11/27/2023] [Accepted: 11/29/2023] [Indexed: 12/18/2023] Open
Abstract
Alzheimer's disease (AD), is a progressive neurodegenerative disorder that involves the deposition of β-amyloid plaques and the clinical symptoms of confusion, memory loss, and cognitive dysfunction. Despite enormous progress in the field, no curative treatment is available. Therefore, the current study was designed to determine the neuroprotective effects of N-methyl-(2S, 4R)-Trans-4-hydroxy-L-proline (NMP) obtained from Sideroxylon obtusifolium, a Brazilian folk medicine with anti-inflammatory and anti-oxidative properties. Here, for the first time, we explored the neuroprotective role of NMP in the Aβ1-42-injected mouse model of AD. After acclimatization, a single intracerebroventricular injection of Aβ1-42 (5 µL/5 min/mouse) in C57BL/6N mice induced significant amyloidogenesis, reactive gliosis, oxidative stress, neuroinflammation, and synaptic and memory deficits. However, an intraperitoneal injection of NMP at a dose of (50 mg/kg/day) for three consecutive weeks remarkably decreased beta secretase1 (BACE-1) and Aβ, activated the astrocyte and microglia expression level as well as downstream inflammatory mediators such as pNF-ĸB, TNF-α, and IL-1β. NPM also strongly attenuated oxidative stress, as evaluated by the expression level of NRF2/HO-1, and synaptic failure, by improving the level of both the presynaptic (SNAP-25 and SYN) and postsynaptic (PSD-95 and SNAP-23) regions of the synapses in the cortexes and hippocampi of the Aβ1-42-injected mice, contributing to cognitive improvement in AD and improving the behavioral deficits displayed in the Morris water maze and Y-maze. Overall, our data suggest that NMP provides potent multifactorial effects, including the inhibition of amyloid plaques, oxidative stress, neuroinflammation, and cognitive deficits.
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Affiliation(s)
- Jawad Ali
- Division of Life Science and Applied Life Science (BK21 FOUR), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea; (J.A.); (A.K.); (J.S.P.); (M.T.); (W.A.); (K.C.)
| | - Amjad Khan
- Division of Life Science and Applied Life Science (BK21 FOUR), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea; (J.A.); (A.K.); (J.S.P.); (M.T.); (W.A.); (K.C.)
| | - Jun Sung Park
- Division of Life Science and Applied Life Science (BK21 FOUR), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea; (J.A.); (A.K.); (J.S.P.); (M.T.); (W.A.); (K.C.)
| | - Muhammad Tahir
- Division of Life Science and Applied Life Science (BK21 FOUR), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea; (J.A.); (A.K.); (J.S.P.); (M.T.); (W.A.); (K.C.)
| | - Waqas Ahmad
- Division of Life Science and Applied Life Science (BK21 FOUR), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea; (J.A.); (A.K.); (J.S.P.); (M.T.); (W.A.); (K.C.)
| | - Kyonghwan Choe
- Division of Life Science and Applied Life Science (BK21 FOUR), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea; (J.A.); (A.K.); (J.S.P.); (M.T.); (W.A.); (K.C.)
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNs), Maastricht University, 6229 ER Maastricht, The Netherlands
| | - Myeong Ok Kim
- Division of Life Science and Applied Life Science (BK21 FOUR), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea; (J.A.); (A.K.); (J.S.P.); (M.T.); (W.A.); (K.C.)
- Alz-Dementia Korea Co., Jinju 52828, Republic of Korea
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Sandhu M, Irfan HM, Arshad L, Ullah A, Shah SA, Ali H. Friedelin and Glutinol induce neuroprotection against ethanol induced neurotoxicity in pup's brain through reduction of TNF-α, NF-kB, caspase-3 and PARP-1. Neurotoxicology 2023; 99:274-281. [PMID: 37939858 DOI: 10.1016/j.neuro.2023.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 09/12/2023] [Accepted: 11/05/2023] [Indexed: 11/10/2023]
Abstract
Ethanol administration triggers an inflammatory response that leads to a complex series of immune responses including the release of an excessive amount of inflammatory mediators particularly tumor necrosis factor (TNF-α) and nuclear factor-kB (NF-KB) which produce a large amount of reactive oxygen species. The inflammatory-induced cytotoxicity is increased when the PI3-kinase/Akt pathway is inhibited. Some studies have also shown that ethanol suppresses the PI3-kinase signaling pathway induced by receptor activation. Friedelin and Glutinol belong to pentacyclic triterpenoid class and are known for their anti-inflammatory and antioxidant properties. The present study was aimed to elucidate the effects of these phytoconstituents on one of the key ethanol-induced neuronal damage pathways. The pups having (5-7 g average body weight) were used and randomly divided into groups. The control and ethanol treated pups were administered 0.9% normal saline while treated pups received glutinol and friedelin (30 mg/kg subcutaneously) respectively. After four hours all the experimental animals were sacrificed and their brains were collected carefully for protein expression analysis of p-Akt, TNF-α, NF-KB, caspase-3 and PARP-1 employing immunoblotting technique. Hemolytic, DNA protection, chelating power and β-carotene assays results revealed that freidelin and glutinol are safe for parenteral administration. Glutinol administration with ethanol significantly abridged the ethanol induced over expression of TNF-α, caspase-3 and PARP-1 in pup's brain. Similarly, freidelin attenuated the neurodegeneration by inhibiting the ethanol induced p-JNK and NF-kB expression in pups' brain. This protection may be attributed to the revival of p-Akt signaling for cell survival. It is concluded that the present study demonstrates the neuro-protective effects of friedelin and glutinol via modulating the capase-3 and PARP-1 expression and modulating the neuronal apoptotic pathways.
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Affiliation(s)
- Marva Sandhu
- College of pharmacy, University of Sargodha, Sargodha, Pakistan; Drugs control and traditional medicines division, NIH Islamabad, Pakistan
| | | | - Laiba Arshad
- Department of Pharmacy, Forman Christian College (A Chartered University), Ferozpur Road Lahore, Pakistan
| | - Aman Ullah
- Department of Pharmacy, Saba Medical Center, P.O. Box 20316, Abu Dhabi, United Arab Emirates
| | - Shahid Ali Shah
- Department of Biology, The University of Haripur, Pakistan; Neuro Molecular Medicines Research Center (NMMRC), Peshawar, Pakistan
| | - Hussain Ali
- Drugs control and traditional medicines division, NIH Islamabad, Pakistan
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Bibi T, Bano S, Ud Din F, Ali H, Khan S. Preparation, characterization, and pharmacological application of oral Honokiol-loaded solid lipid nanoparticles for diabetic neuropathy. Int J Pharm 2023; 645:123399. [PMID: 37703961 DOI: 10.1016/j.ijpharm.2023.123399] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 08/24/2023] [Accepted: 09/08/2023] [Indexed: 09/15/2023]
Abstract
Honokiol is a phytochemical component with a variety of pharmacological properties. However, the major limitation of Honokiol is its poor solubility and low oral bioavailability. In this study, we formulated and characterized oral Honokiol-loaded solid lipid nanoparticles (SLNs) to enhance bioavailability and then evaluated their effectiveness in experimental diabetic neuropathy (DN). The finalized formulation has a spherical morphology, a particle size (PS) of 121.31 ± 9.051 nm, a polydispersity index (PDI) of 0.249 ± 0.002, a zeta potential (ZP) of -20.8 ± 2.72 mV, and an entrapment efficiency (% EE) of 88.66 ± 2.30 %. In-vitro release data shows, Honokiol-SLNs displayed a sustained release profile at pH (7.4). The oral bioavailability of Honokiol-SLNs was remarkably greater (8-fold) than Honokiol-Pure suspension. The neuroprotective property of Honokiol-SLNs was initially demonstrated against hydrogen peroxide H2O2-stimulated PC12 (pheochromocytoma) cells. Furthermore, results of in-vivo studies demonstrated that treatment with Honokiol-SLNs significantly (p < 0.001) suppressed oxidative stress by inhibition of nuclear factor kappa B (NF-κB) and significant (p < 0.001) upregulation of nuclear factor-erythroid 2-related factor 2 (Nrf2) signaling in the spinal cord. The expression of transient receptor potential melastatin 8(TRPM8) and transient receptor potential vanilloid 1 (TRPV1) was significantly (p < 0.001) downregulated. Honokiol-SLNs inhibited apoptosis by significant (p < 0.001) downregulation of cleaved caspase-3 expression in the spinal cord. These findings demonstrate that Honokiol-SLNs providedbetter neuroprotection in DN because of higher oral bioavailability.
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Affiliation(s)
- Tehmina Bibi
- Pharmacological Sciences Research Lab, Department of Pharmacy, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan; Department of Pharmacy, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Shahar Bano
- Pharmacological Sciences Research Lab, Department of Pharmacy, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan; Department of Pharmacy, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Fakhar Ud Din
- Department of Pharmacy, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan; Nanomedicine Research Group, Department of Pharmacy, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Hussain Ali
- Department of Pharmacy, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Salman Khan
- Pharmacological Sciences Research Lab, Department of Pharmacy, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan; Department of Pharmacy, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan.
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Sara Salahuddin H, Attaullah S, Ali Shah S, Khan S, Zahid M, Ullah M, Khayyam, Salahuddin S, Gul S, Alsugoor MH. Ranuncoside's attenuation of scopolamine-induced memory impairment in mice via Nrf2 and NF-ĸB signaling. Saudi Pharm J 2023; 31:101702. [PMID: 37533493 PMCID: PMC10391653 DOI: 10.1016/j.jsps.2023.101702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 07/07/2023] [Indexed: 08/04/2023] Open
Abstract
Scopolamine is a well-known pharmacological agent responsible for causing memory impairment in animals, as well as oxidative stress and neuroinflammation inducer which lead to the development of Alzheimer disease. Although a cure for Alzheimer's disease is unavailable. Ranuncoside, a metabolite obtained from a medicinal plant has demonstrated antioxidant and anti-inflammatory properties in vitro, making it a promising treatment with potential anti-Alzheimer disease properties. However, as ranuncoside has not been evaluated for its antioxidant and anti-neuroinflammatory properties in any in vivo model, our study aimed to evaluate its neurotherapeutic efficacy against scopolamine-induced memory impairment in adult male albino mice. Mice were randomly divided into four experimental groups. Mice of group I was injected with saline, group II was injected with scopolamine (1 mg/kg/day) for 3 weeks. After receiving a daily injection of scopolamine for 1 week, the mice of group III were injected with ranuncoside (10 mg/kg) every other day for 2 weeks along with scopolamine daily and group IV were injected with ranuncoside on 5th alternate days. Behavioral tests (i.e., Morris water maze and Y-maze) were performed to determine the memory-enhancing effect of ranuncoside against scopolamine's memory deleterious effect. Western blot analysis was also performed to further elucidate the anti-neuroinflammatory and antioxidant effects of ranuncoside against scopolamine-induced neuroinflammation and oxidative stress. Our results showed memory-enhancing, anti-neuroinflammatory effect, and antioxidant effects of ranuncoside against scopolamine by increasing the expression of the endogenous antioxidant system (i.e., Nrf2 and HO-1), followed by blocking neuroinflammatory markers such as NF-κB, COX-2, and TNF-α. The results also revealed that ranuncoside possesses hypoglycemic and hypolipidemic effects against scopolamine-induced hyperglycemia and hyperlipidemia in mice as well as scopolamine's hyperglycemic effect. In conclusion, our findings suggest that ranuncoside could be a potential agent for the management of Alzheimer's disease, hyperglycemia, and hyperlipidemia.
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Affiliation(s)
| | - Sobia Attaullah
- Department of Zoology, Islamia College, Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - Shahid Ali Shah
- Neuro Molecular Medicine Research Centre (NMMRC), Ring Road, Peshawar, KPK, Pakistan
- The University of Haripur, KPK, Pakistan
| | - SanaUllah Khan
- Department of Zoology, University of Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - Muhammad Zahid
- Department of Zoology, Islamia College, Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - Mujeeb Ullah
- Department of Zoology, Islamia College, Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - Khayyam
- Department of Zoology, Islamia College, Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - Sidra Salahuddin
- Hayatabad Medical Complex, Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - Seema Gul
- Department of Zoology, Islamia College, Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - Mahdi H Alsugoor
- Department of Emergency Medical Services, College of Health Sciences-AlQunfudah, Umm Al- Qura University, Makkah 21912, Saudi Arabia
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Jahan R, Yousaf M, Khan H, Shah SA, Khan AA, Bibi N, Javed F, Ijaz M, Ali A, Wei DQ. Zinc Ortho Methyl Carbonodithioate Improved Pre and Post-Synapse Memory Impairment via SIRT1/p-JNK Pathway against Scopolamine in Adult Mice. J Neuroimmune Pharmacol 2023; 18:183-194. [PMID: 37261605 DOI: 10.1007/s11481-023-10067-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 04/17/2023] [Indexed: 06/02/2023]
Abstract
Alzheimer's disease (AD) is globally recognized as a prominent cause of dementia for which efficient treatment is still lacking. New candidate compounds that are biologically potent are regularly tested. We, therefore, hypothesized to study the neuroprotective potential of Zinc Ortho Methyl Carbonodithioate (thereafter called ZOMEC) against Scopolamine (SCOP) induced Alzheimer's disease (AD) model using adult albino mice. We post-administered ZOMEC (30 mg/Kg) into two group of mice for three weeks on daily basis that received either 0.9% saline or SCOP (1 mg/Kg) for initial two weeks. The other two groups of mice received 0.9% saline and SCOP (1 mg/Kg) respectively. After memory related behavioral analysis the brain homogenates were evaluated for the antioxidant potential of ZOMEC and multiple protein markers were examined through western blotting. Our results provide enough evidences that ZOMEC decrease oxidative stress by increasing catalase (CAT) and glutathione S transferase (GST) and decreasing the lipid peroxidation (LPO). The SIRT1 and pre and post synaptic marker proteins, synaptophysin (SYP) as well as post synaptic density protein (PSD-95) expression were also enhanced upon ZOMEC treatment. Furthermore, memory impairment was rescued and ZOMEC appreciably abrogated the Aβ accumulation, BACE1 expression C and the p-JNK pathway. The inflammatory protein markers, NF-kβ and IL-1β in ZOMEC treated mice were also comparable with control group. The predicted interaction of ZOMEC with SIRT1 was further confirmed by molecular docking. These findings thus provide initial reports on efficacy of ZOMEC in SCOP induced AD model.
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Affiliation(s)
- Rifat Jahan
- Department of Chemistry, Islamia College University, Peshawar, Pakistan
- Department of Biochemistry Shaheed Benazir, Bhutto Women University, Peshawar, Pakistan
| | - Mohammad Yousaf
- Department of Chemistry, Islamia College University, Peshawar, Pakistan.
| | - Hamayun Khan
- Department of Chemistry, Islamia College University, Peshawar, Pakistan
| | - Shahid Ali Shah
- Department of Biology, University of Haripur, Khyber Pakhtunkhwa, Haripur, 22620, Pakistan
| | - Abdul Aziz Khan
- Bio-X Institutes, Key Laboratory for the Genetics of Development and Neuropsychiatric Disorders (Ministry of Education), Shanghai Key Laboratory of Psychotic Disorders, and Brain Science and Technology Research Center, Institute of Psychology and Behavioral Sciences, Shanghai Jiao Tong University, Shanghai, China
| | - Nousheen Bibi
- Department of Bioinformatics, Shaheed Benazir Bhutto Women University, Peshawar, Pakistan
| | - Fatima Javed
- Department of Chemistry, Shaheed Benazir Bhutto Women University, Peshawar, Pakistan
| | - Musarrat Ijaz
- Department of Statistics Shaheed Benazir, Bhutto Women University, Peshawar, Pakistan
| | - Arif Ali
- Department of Bioinformatics and Biological Statistics, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Dong-Qing Wei
- Peng Cheng Laboratory, Vanke Cloud City Phase I Building 8, Xili Street, Nashan District, Shenzhen, Guangdong, 518055, People's Republic of China.
- State Key Laboratory of Microbial Metabolism, Shanghai-Islamabad-Belgrade Joint Innovation Center on Antibacterial Resistances, Joint Laboratory of International Cooperation in Metabolic and Developmental Sciences, Ministry of Education and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200030, People's Republic of China.
- Department of Bioinformatics, College of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China.
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Kaji AA, Torii M, Ishii S. Caspase-3 Inhibition toward Perinatal Protection of the Developing Brain from Environmental Stress. Dev Neurosci 2023; 45:66-75. [PMID: 36642064 PMCID: PMC10521911 DOI: 10.1159/000529125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 01/04/2023] [Indexed: 01/15/2023] Open
Abstract
Throughout our lives, we are exposed to a variety of hazards, such as environmental pollutants and chemical substances that affect our health, and viruses and bacteria that cause infectious diseases. These external factors that are undesirable to an organism are called environmental stress. During the perinatal period, when neural networks are drastically reorganized and refined, the tolerance of the developing brain to various environmental stresses is lower than in adulthood. Thus, exposure to environmental stress during this vulnerable period is strongly associated with cognitive and behavioral deficits in later life. Recent studies have uncovered various mechanisms underlying the adverse impacts of environmental stress during the perinatal period on brain development. In this mini-review, we will present the findings from these studies, focusing on caspase-mediated apoptotic and nonapoptotic effects of environmental stress, and discuss several compounds that mitigate these caspase-mediated effects as examples of potential therapeutic approaches.
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Affiliation(s)
- Anna Arjun Kaji
- Center for Neuroscience Research, Children’s Research Institute, Children’s National Hospital, Washington, D.C., United States
| | - Masaaki Torii
- Center for Neuroscience Research, Children’s Research Institute, Children’s National Hospital, Washington, D.C., United States
- Department of Pediatrics, Pharmacology and Physiology, School of Medicine and Health Sciences, The George Washington University, Washington, D.C., United States
| | - Seiji Ishii
- Department of Anatomy, Keio University School of Medicine, Tokyo, Japan
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Fahimi S, Oryan S, Ahmadi R, Eidi A. Downregulation of Bax/Bcl-2 Expression During Apoptosis in the Hippocampus of Diabetic Male Wistar Rats: Ameliorative Effects of Peganum harmala Seed Extract. IRANIAN JOURNAL OF PHARMACEUTICAL RESEARCH : IJPR 2022; 21:e132071. [PMID: 36915407 PMCID: PMC10007996 DOI: 10.5812/ijpr-132071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 12/10/2022] [Accepted: 01/11/2023] [Indexed: 02/04/2023]
Abstract
Background Apoptosis is proposed as a possible mechanism for diabetes-induced hippocampal neuronal cell death. Numerous studies have suggested that the therapeutic properties of plants, such as antioxidant and anti-apoptotic, are effective in improving the complications of diabetes in the hippocampus. Objectives This study aimed to evaluate the anti-apoptotic properties of Peganum harmala (P. harmala) in the brain hippocampal cells of diabetic rats. Methods In this experimental study, 48 male Wistar rats were divided into six groups (n = 8) as follows: Control (C), diabetic (D), harmine (H), diabetic plus harmine (DH), seed extract (S), and diabetic plus seed extract (DS). A single dose of streptozotocin (STZ) (60 mg/kg) was enough to cause diabetes. Seed extract and harmine were given at 150 mg/kg and 6.5 mg/kg, respectively (daily by oral gavage for 28 days). The glucose levels in the blood were measured, and the histological staining of the hippocampus was examined. Percentages of apoptotic hippocampal cells were identified with flow cytometry. Bax and Bcl-2 expression was assayed via Real time- polymerase chain reaction (PCR) and Western blot. Results In DH (P = 0.001) and DS (P = 0.01) rats, the mean fasting blood glucose level significantly reduced compared with the D group. Bax and Bcl-2 expression at both mRNA and protein levels significantly differed between the D group and other groups (P = 0.01). Harmine and the seed extract considerably reduced the Bax/Bcl-2 ratio in the hippocampal cells compared to the D group (P = 0.001). Conclusions Streptozotocin-induced apoptosis in the hippocampus of diabetic rats was reduced by administering the seed extract of Peganum harmala. The P. harmala seed extract and its active ingredient, harmine, could be used as anti-apoptotic drugs.
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Affiliation(s)
- Saeedeh Fahimi
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Shahrbanoo Oryan
- Department of Animal Sciences, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran
| | - Ramesh Ahmadi
- Department of Animal Sciences, Faculty of Basic Sciences, Islamic Azad University of Qom, Qom, Iran
- Corresponding Author: Department of Animal Sciences, Faculty of Basic Sciences, Islamic Azad University of Qom, Qom, Iran.
| | - Akram Eidi
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
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ZOMEC via the p-Akt/Nrf2 Pathway Restored PTZ-Induced Oxidative Stress-Mediated Memory Dysfunction in Mouse Model. BIOMED RESEARCH INTERNATIONAL 2022; 2022:8902262. [PMID: 36193329 PMCID: PMC9526611 DOI: 10.1155/2022/8902262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 08/12/2022] [Indexed: 11/17/2022]
Abstract
A new mechanistic approach to overcome the neurodegenerative disorders caused by oxidative stress in Alzheimer's disease (AD) is highly stressed in this article. Thus, a newly formulated drug (zinc ortho-methyl carbonodithioate (ZOMEC)) was investigated for five weeks on seven-week-old BALB/c male mice. ZOMEC 30 mg/kg was postadministered intraperitoneally during the third week of pentylenetetrazole (PTZ) injection. The brain homogenates of the mice were evaluated for their antioxidant potential for ZOMEC. The results including catalase (CAT), glutathione S transferase (GST), and lipid peroxidation (LPO) demonstrated that ZOMEC significantly reverted the oxidative stress stimulated by PTZ in the mouse brain. ZOMEC upregulated p-Akt/Nrf-2 pathways (also supported by molecular docking methods) to revoke PTZ-induced apoptotic protein markers. ZOMEC reversed PTZ-induced neuronal synapse deficits, improved oxidative stress-aided memory impairment, and inhibited the amyloidogenic pathway in mouse brains. The results suggested the potential of ZOMEC as a new, safe, and neurotherapeutic agent to cure neurodegenerative disorders by decreasing AD-like neuropathology in the animal PTZ model.
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Pharmacological mechanism of xanthoangelol underlying Nrf-2/TRPV1 and anti-apoptotic pathway against scopolamine-induced amnesia in mice. Biomed Pharmacother 2022; 150:113073. [PMID: 35658216 DOI: 10.1016/j.biopha.2022.113073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 04/26/2022] [Accepted: 04/29/2022] [Indexed: 11/23/2022] Open
Abstract
Alzheimer's disease (AD) is a well-known type of age-related dementia. The present study was conducted to investigate the effect of xanthoangelol against memory deficit and neurodegeneration associated with AD. Preliminarily, xanthoangelol produced neuroprotective effect against H2O2-induced HT-22 cells. Furthermore, effect of xanthoangelol against scopolamine-induced amnesia in mice was determined by intraperitoneally (i.p.) administering xanthoangelol (1, 10 and 20 mg/kg), 30 min prior to induction. Mice were administered scopolamine at a concentration of 1 mg/kg; i.p. for the induction of amnesia associated with AD. Xanthoangelol dose dependently reduced the symptoms of Alzheimer's disease as observed by the results obtained from the behavioral analysis performed using Morris water maze and Y-maze test. The immunohistochemical analysis suggested that xanthoangelol significantly improved Keap-1/Nrf-2 signaling pathway. It greatly reduced the effects of oxidative stress and showed improvement in the anti-oxidant enzyme such as GSH, GST, SOD and catalase. Additionally, xanthoangelol decreased the expression of transient receptor potential vanilloid 1 (TRPV-1), a nonselective cation channel, involved in synaptic plasticity and memory. It activated the anti-oxidants and attenuated the apoptotic (Bax/Bcl-2) pathway. Xanthoangelol also significantly attenuated the scopolamine-induced neuroinflammation by the inhibition of interleukin-1 beta (IL-1β), and tumor necrosis factor-α (TNF-α) levels. The histological analysis, showed a significant reduction in amyloid plaques by xanthoangelol. Therefore, the present study indicated that xanthoangelol has the ability to ameliorate the AD symptoms by attenuating neuroinflammation and neurodegeneration induced by scopolamine.
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Formolo DA, Cheng T, Yu J, Kranz GS, Yau SY. Central Adiponectin Signaling – A Metabolic Regulator in Support of Brain Plasticity. Brain Plast 2022; 8:79-96. [DOI: 10.3233/bpl-220138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/22/2022] [Indexed: 12/18/2022] Open
Abstract
Brain plasticity and metabolism are tightly connected by a constant influx of peripheral glucose to the central nervous system in order to meet the high metabolic demands imposed by neuronal activity. Metabolic disturbances highly affect neuronal plasticity, which underlies the prevalent comorbidity between metabolic disorders, cognitive impairment, and mood dysfunction. Effective pro-cognitive and neuropsychiatric interventions, therefore, should consider the metabolic aspect of brain plasticity to achieve high effectiveness. The adipocyte-secreted hormone, adiponectin, is a metabolic regulator that crosses the blood-brain barrier and modulates neuronal activity in several brain regions, where it exerts neurotrophic and neuroprotective properties. Moreover, adiponectin has been shown to improve neuronal metabolism in different animal models, including obesity, diabetes, and Alzheimer’s disease. Here, we aim at linking the adiponectin’s neurotrophic and neuroprotective properties with its main role as a metabolic regulator and to summarize the possible mechanisms of action on improving brain plasticity via its role in regulating the intracellular energetic activity. Such properties suggest adiponectin signaling as a potential target to counteract the central metabolic disturbances and impaired neuronal plasticity underlying many neuropsychiatric disorders.
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Affiliation(s)
- Douglas A. Formolo
- Department of Rehabilitation Sciences, Faculty of Health and Social Sciences, Hong Kong Polytechnic University, Hung Hom, Hong Kong
- Mental Health Research Center (MHRC), Hong Kong Polytechnic University3Institute of future foods
- Research Institute for Smart Ageing (RISA), Hong Kong Polytechnic University
| | - Tong Cheng
- Department of Rehabilitation Sciences, Faculty of Health and Social Sciences, Hong Kong Polytechnic University, Hung Hom, Hong Kong
- Mental Health Research Center (MHRC), Hong Kong Polytechnic University3Institute of future foods
- Research Institute for Smart Ageing (RISA), Hong Kong Polytechnic University
| | - Jiasui Yu
- Department of Rehabilitation Sciences, Faculty of Health and Social Sciences, Hong Kong Polytechnic University, Hung Hom, Hong Kong
- Mental Health Research Center (MHRC), Hong Kong Polytechnic University3Institute of future foods
- Research Institute for Smart Ageing (RISA), Hong Kong Polytechnic University
| | - Georg S. Kranz
- Department of Rehabilitation Sciences, Faculty of Health and Social Sciences, Hong Kong Polytechnic University, Hung Hom, Hong Kong
- Department of Psychiatry and Psychotherapy, Medical University of Vienna, Austria
- The State Key Laboratory of Brain and Cognitive Sciences, The University of Hong Kong, Hong Kong, China
| | - Suk-Yu Yau
- Department of Rehabilitation Sciences, Faculty of Health and Social Sciences, Hong Kong Polytechnic University, Hung Hom, Hong Kong
- Mental Health Research Center (MHRC), Hong Kong Polytechnic University3Institute of future foods
- Research Institute for Smart Ageing (RISA), Hong Kong Polytechnic University
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11
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Amirshahrokhi K, Niapour A. Methylsulfonylmethane protects against ethanol-induced brain injury in mice through the inhibition of oxidative stress, proinflammatory mediators and apoptotic cell death. Int Immunopharmacol 2022; 106:108638. [PMID: 35203043 DOI: 10.1016/j.intimp.2022.108638] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 02/04/2022] [Accepted: 02/16/2022] [Indexed: 11/17/2022]
Abstract
Excessive ethanol consumption causes brain injury through oxidative stress, inflammation and apoptotic cell death. Methylsulfonylmethane (MSM) is a natural compound that has therapeutic effects on oxidative and inflammatory disorders. The aim of this study was to investigate the protective effect and underlying mechanisms of MSM on ethanol-induced brain injury in an experimental model. Male C57BL/6 mice were exposed to binge ethanol (5 g/kg/day, orally) and treated with MSM (200 and 400 mg/kg/day) concomitantly for 12 days. At the end of the experiment brain tissues were removed for histological and biochemical analysis. The results showed that MSM reduced ethanol-mediated oxidative stress by decreasing the levels of malondialdehyde (MDA) and carbonyl protein. The Nrf2/HO-1 pathway and the levels of cytoprotective antioxidants superoxide dismutase (SOD), catalase and glutathione (GSH) were increased by MSM in the brain tissue. MSM treatment reduced the ethanol-induced inflammatory factors including myeloperoxidase (MPO), iNOS/NO, cyclooxygenase (COX)-2, nuclear factor kappa B (NF-κB), NLRP3 inflammasome and proinflammatory cytokines including TNF-α, IL-1β, IL-6 and MCP-1. MSM also decreased the levels of pro-apoptotic caspase-3 and TUNEL positive cells while increased the level of anti-apoptotic Bcl-2 in the brain tissue. Our findings demonstrated that MSM protects against ethanol-induced brain injury by improving anti-oxidant defense mechanism and reducing ethanol-mediated inflammation and apoptosis. Therefore, MSM may be a potential protective approach for brain damage caused by high levels of alcohol.
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Affiliation(s)
- Keyvan Amirshahrokhi
- Department of Pharmacology, School of Pharmacy, Ardabil University of Medical Sciences, Ardabil, Iran.
| | - Ali Niapour
- Department of Anatomical Sciences, School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran
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12
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Park JS, Saeed K, Jo MH, Kim MW, Lee HJ, Park CB, Lee G, Kim MO. LDHB Deficiency Promotes Mitochondrial Dysfunction Mediated Oxidative Stress and Neurodegeneration in Adult Mouse Brain. Antioxidants (Basel) 2022; 11:antiox11020261. [PMID: 35204143 PMCID: PMC8868245 DOI: 10.3390/antiox11020261] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 01/27/2022] [Indexed: 11/17/2022] Open
Abstract
Age-related decline in mitochondrial function and oxidative stress plays a critical role in neurodegeneration. Lactate dehydrogenase-B (LDHB) is a glycolytic enzyme that catalyzes the conversion of lactate, an important brain energy substrate, into pyruvate. It has been reported that the LDHB pattern changes in the brain during ageing. Yet very little is known about the effect of LDHB deficiency on brain pathology. Here, we have used Ldhb knockout (Ldhb−/−) mice to test the hypothesis that LDHB deficiency plays an important role in oxidative stress-mediated neuroinflammation and neurodegeneration. LDHB knockout (Ldhb−/−) mice were generated by the ablation of the Ldhb gene using the Cre/loxP-recombination system in the C57BL/6 genetic background. The Ldhb−/− mice were treated with either osmotin (15 μg/g of the body; intraperitoneally) or vehicle twice a week for 5-weeks. After behavior assessments, the mice were sacrificed, and the cortical and hippocampal brain regions were analyzed through biochemical and morphological analysis. Ldhb−/− mice displayed enhanced reactive oxygen species (ROS) and lipid peroxidation (LPO) production, and they revealed depleted stores of cellular ATP, GSH:GSSG enzyme ratio, and downregulated expression of Nrf2 and HO-1 proteins, when compared to WT littermates. Importantly, the Ldhb−/− mice showed upregulated expression of apoptosis mediators (Bax, Cytochrome C, and caspase-3), and revealed impaired p-AMPK/SIRT1/PGC-1alpha signaling. Moreover, LDHB deficiency-induced gliosis increased the production of inflammatory mediators (TNF-α, Nf-ĸB, and NOS2), and revealed cognitive deficits. Treatment with osmotin, an adipoR1 natural agonist, significantly increased cellular ATP production by increasing mitochondrial function and attenuated oxidative stress, neuroinflammation, and neuronal apoptosis, probably, by upregulating p-AMPK/SIRT1/PGC-1alpha signaling in Ldhb−/− mice. In brief, LDHB deficiency may lead to brain oxidative stress-mediated progression of neurodegeneration via regulating p-AMPK/SIRT1/PGC-1alpha signaling, while osmotin could improve mitochondrial functions, abrogate oxidative stress and alleviate neuroinflammation and neurodegeneration in adult Ldhb−/− mice.
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Affiliation(s)
- Jun Sung Park
- Division of Life Science and Applied Life Science (BK21 FOUR), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea; (J.S.P.); (K.S.); (M.H.J.); (M.W.K.); (H.J.L.)
| | - Kamran Saeed
- Division of Life Science and Applied Life Science (BK21 FOUR), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea; (J.S.P.); (K.S.); (M.H.J.); (M.W.K.); (H.J.L.)
| | - Myeung Hoon Jo
- Division of Life Science and Applied Life Science (BK21 FOUR), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea; (J.S.P.); (K.S.); (M.H.J.); (M.W.K.); (H.J.L.)
| | - Min Woo Kim
- Division of Life Science and Applied Life Science (BK21 FOUR), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea; (J.S.P.); (K.S.); (M.H.J.); (M.W.K.); (H.J.L.)
| | - Hyeon Jin Lee
- Division of Life Science and Applied Life Science (BK21 FOUR), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea; (J.S.P.); (K.S.); (M.H.J.); (M.W.K.); (H.J.L.)
| | - Chan-Bae Park
- Department of Otolaryngology, Ajou University School of Medicine, Suwon 16499, Korea; or
| | - Gwang Lee
- Department of Physiology, Ajou University School of Medicine, Suwon 16499, Korea;
| | - Myeong Ok Kim
- Division of Life Science and Applied Life Science (BK21 FOUR), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea; (J.S.P.); (K.S.); (M.H.J.); (M.W.K.); (H.J.L.)
- Alz-Dementia Korea Co., Jinju 52828, Korea
- Correspondence: ; Tel.: +82-55-772-1345; Fax: +82-55-772-2656
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13
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Riccardi C, Napolitano F, Montesarchio D, Sampaolo S, Melone MAB. Nanoparticle-Guided Brain Drug Delivery: Expanding the Therapeutic Approach to Neurodegenerative Diseases. Pharmaceutics 2021; 13:1897. [PMID: 34834311 PMCID: PMC8623286 DOI: 10.3390/pharmaceutics13111897] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 10/31/2021] [Accepted: 11/04/2021] [Indexed: 02/07/2023] Open
Abstract
Neurodegenerative diseases (NDs) represent a heterogeneous group of aging-related disorders featured by progressive impairment of motor and/or cognitive functions, often accompanied by psychiatric disorders. NDs are denoted as 'protein misfolding' diseases or proteinopathies, and are classified according to their known genetic mechanisms and/or the main protein involved in disease onset and progression. Alzheimer's disease (AD), Parkinson's disease (PD) and Huntington's disease (HD) are included under this nosographic umbrella, sharing histopathologically salient features, including deposition of insoluble proteins, activation of glial cells, loss of neuronal cells and synaptic connectivity. To date, there are no effective cures or disease-modifying therapies for these NDs. Several compounds have not shown efficacy in clinical trials, since they generally fail to cross the blood-brain barrier (BBB), a tightly packed layer of endothelial cells that greatly limits the brain internalization of endogenous substances. By engineering materials of a size usually within 1-100 nm, nanotechnology offers an alternative approach for promising and innovative therapeutic solutions in NDs. Nanoparticles can cross the BBB and release active molecules at target sites in the brain, minimizing side effects. This review focuses on the state-of-the-art of nanoengineered delivery systems for brain targeting in the treatment of AD, PD and HD.
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Affiliation(s)
- Claudia Riccardi
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia 21, I-80126 Naples, Italy; (C.R.); (D.M.)
| | - Filomena Napolitano
- Department of Advanced Medical and Surgical Sciences, 2nd Division of Neurology, Center for Rare Diseases and InterUniversity Center for Research in Neurosciences, University of Campania Luigi Vanvitelli, Via Sergio Pansini, 5, I-80131 Naples, Italy; (F.N.); (S.S.)
| | - Daniela Montesarchio
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia 21, I-80126 Naples, Italy; (C.R.); (D.M.)
| | - Simone Sampaolo
- Department of Advanced Medical and Surgical Sciences, 2nd Division of Neurology, Center for Rare Diseases and InterUniversity Center for Research in Neurosciences, University of Campania Luigi Vanvitelli, Via Sergio Pansini, 5, I-80131 Naples, Italy; (F.N.); (S.S.)
| | - Mariarosa Anna Beatrice Melone
- Department of Advanced Medical and Surgical Sciences, 2nd Division of Neurology, Center for Rare Diseases and InterUniversity Center for Research in Neurosciences, University of Campania Luigi Vanvitelli, Via Sergio Pansini, 5, I-80131 Naples, Italy; (F.N.); (S.S.)
- Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, Temple University, Philadelphia, PA 19122-6078, USA
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Shal B, Khan A, Khan AU, Ullah R, Ali G, Islam SU, Haq IU, Ali H, Seo EK, Khan S. Alleviation of Memory Deficit by Bergenin via the Regulation of Reelin and Nrf-2/NF-κB Pathway in Transgenic Mouse Model. Int J Mol Sci 2021; 22:6603. [PMID: 34203049 PMCID: PMC8234641 DOI: 10.3390/ijms22126603] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 06/09/2021] [Accepted: 06/16/2021] [Indexed: 12/15/2022] Open
Abstract
The present study aims to determine the neuroprotective effect of Bergenin against spatial memory deficit associated with neurodegeneration. Preliminarily, the protective effect of Bergenin was observed against H2O2-induced oxidative stress in HT-22 and PC-12 cells. Further studies were performed in 5xFAD Tg mouse model by administering Bergenin (1, 30 and 60 mg/kg; orally), whereas Bergenin (60 mg/kg) significantly attenuated the memory deficit observed in the Y-maze and Morris water maze (MWM) test. Fourier transform-infrared (FT-IR) spectroscopy displayed restoration of lipids, proteins and their derivatives compared to the 5xFAD Tg mice group. The differential scanning calorimeter (DSC) suggested an absence of amyloid beta (Aβ) aggregation in Bergenin-treated mice. The immunohistochemistry (IHC) analysis suggested the neuroprotective effect of Bergenin by increasing Reelin signaling (Reelin/Dab-1) and attenuated Aβ (1-42) aggregation in hippocampal regions of mouse brains. Furthermore, IHC and western blot results suggested antioxidant (Keap-1/Nrf-2/HO-1), anti-inflammatory (TLR-4/NF-kB) and anti-apoptotic (Bcl-2/Bax/Caspase-3) effect of Bergenin. Moreover, a decrease in Annexin V/PI-stained hippocampal cells suggested its effect against neurodegeneration. The histopathological changes were reversed significantly by Bergenin. In addition, a remarkable increase in antioxidant level with suppression of pro-inflammatory cytokines, oxidative stress and nitric oxide production were observed in specific regions of the mouse brains.
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Affiliation(s)
- Bushra Shal
- Pharmacological Sciences Research Lab, Department of Pharmacy, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan; (B.S.); (A.K.); (A.U.K.)
| | - Adnan Khan
- Pharmacological Sciences Research Lab, Department of Pharmacy, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan; (B.S.); (A.K.); (A.U.K.)
| | - Ashraf Ullah Khan
- Pharmacological Sciences Research Lab, Department of Pharmacy, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan; (B.S.); (A.K.); (A.U.K.)
| | - Rahim Ullah
- Department of Pharmacy, University of Peshawar, Peshawar 25120, Pakistan; (R.U.); (G.A.)
| | - Gowhar Ali
- Department of Pharmacy, University of Peshawar, Peshawar 25120, Pakistan; (R.U.); (G.A.)
| | - Salman Ul Islam
- School of Life Sciences, College of Natural Sciences, Kyungpook National University, Daegu 41566, Korea;
| | - Ihsan ul Haq
- Department of Pharmacy, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan; (I.u.H.); (H.A.)
| | - Hussain Ali
- Department of Pharmacy, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan; (I.u.H.); (H.A.)
| | - Eun-Kyoung Seo
- College of Pharmacy, Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Korea
| | - Salman Khan
- Pharmacological Sciences Research Lab, Department of Pharmacy, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan; (B.S.); (A.K.); (A.U.K.)
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15
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Geetha RG, Krishnankutty Nair Chandrika S, Saraswathy GG, Nair Sivakumari A, Sakuntala M. ROS Dependent Antifungal and Anticancer Modulations of Piper colubrinum Osmotin. Molecules 2021; 26:molecules26082239. [PMID: 33924432 PMCID: PMC8070354 DOI: 10.3390/molecules26082239] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/23/2021] [Accepted: 03/29/2021] [Indexed: 11/16/2022] Open
Abstract
Osmotin, a plant defense protein, has functional similarity to adiponectin, an insulin sensitizingsensitising hormone secreted by adipocytes. We speculated that Piper colubrinum Osmotin (PcOSM) could have functional roles in obesity-related cancers, especially breast cancer. Immunofluorescence assays, flow cytometry, cell cycle analysis and a senescence assay were employed to delineate the activity in MDAMB231 breast cancer cell line. PcOSM pre-treated P. nigrum leaves showed significant reduction in disease symptoms correlated with high ROS production. In silico analysis predicted that PcOSM has higher binding efficiency with adiponectin receptor compared to adiponectin. PcOSM was effectively taken up by MDAMB231 cancer cells which resulted in marked increase in intracellular ROS levels leading to senescence and cell cycle arrest in G2/M stage. This study provides evidence on the ROS mediated direct inhibitory activity of the plant derived osmotin protein on the phytopathogen Phytophthora capsici, and the additional functional roles of this plant defense protein on cancer cells through inducing ROS associated senescence. The strong leads produced from this study could be pursued further to obtain more insights into the therapeutic potential of osmotin in human cancers.
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Affiliation(s)
- Rajeswari Gopal Geetha
- Plant Disease Biology Laboratory, Rajiv Gandhi Centre for Biotechnology, Jagathy, Thycaud P.O., Thiruvananthapuram 695014, Kerala, India; (R.G.G.); (G.G.S.)
| | | | - Gayathri G. Saraswathy
- Plant Disease Biology Laboratory, Rajiv Gandhi Centre for Biotechnology, Jagathy, Thycaud P.O., Thiruvananthapuram 695014, Kerala, India; (R.G.G.); (G.G.S.)
| | - Asha Nair Sivakumari
- Cancer Research Program, Rajiv Gandhi Centre for Biotechnology, Thycaud P.O., Thiruvananthapuram 695014, Kerala, India;
| | - Manjula Sakuntala
- Plant Disease Biology Laboratory, Rajiv Gandhi Centre for Biotechnology, Jagathy, Thycaud P.O., Thiruvananthapuram 695014, Kerala, India; (R.G.G.); (G.G.S.)
- Correspondence:
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16
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Freitas CDTD, Nishi BC, do Nascimento CTM, Silva MZR, Bezerra EHS, Rocha BAM, Grangeiro TB, Oliveira JPBD, Souza PFN, Ramos MV. Characterization of Three Osmotin-Like Proteins from Plumeria rubra and Prospection for Adiponectin Peptidomimetics. Protein Pept Lett 2021; 27:593-603. [PMID: 31994998 DOI: 10.2174/0929866527666200129154357] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 11/13/2019] [Accepted: 12/02/2019] [Indexed: 01/28/2023]
Abstract
BACKGROUND Osmotin-Like Proteins (OLPs) have been purified and characterized from different plant tissues, including latex fluids. Besides its defensive role, tobacco osmotin seems to induce adiponectin-like physiological effects, acting as an agonist. However, molecular information about this agonistic effect on adiponectin receptors has been poorly exploited and other osmotins have not been investigated yet. OBJECTIVE AND METHODS The present study involved the characterization of three OLPs from Plumeria rubra latex and molecular docking studies to evaluate the interaction between them and adiponectin receptors (AdipoR1 and AdipoR2). RESULTS P. rubra Osmotin-Like Proteins (PrOLPs) exhibited molecular masses from 21 to 25 kDa and isoelectric points ranging from 4.4 to 7.7. The proteins have 16 cysteine residues, which are involved in eight disulfide bonds, conserved in the same positions as other plant OLPs. The threedimensional (3D) models exhibited the three typical domains of OLPs, and molecular docking analysis showed that two PrOLP peptides interacted with two adiponectin receptors similarly to tobacco osmotin peptide. CONCLUSION As observed for tobacco osmotin, the latex osmotins of P. rubra exhibited compatible interactions with adiponectin receptors. Therefore, these plant defense proteins (without known counterparts in humans) are potential tools to study modulation of glucose metabolism in type II diabetes, where adiponectin plays a pivotal role in homeostasis.
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Affiliation(s)
- Cleverson D T de Freitas
- Departamento de Bioquimica e Biologia Molecular, Universidade Federal do Ceara, Centro de Ciencias, Bloco 907, Campus do Pici. Fortaleza, Ceara, CEP 60440-900, Brazil
| | - Beatriz C Nishi
- Departamento de Bioquimica e Biologia Molecular, Universidade Federal do Ceara, Centro de Ciencias, Bloco 907, Campus do Pici. Fortaleza, Ceara, CEP 60440-900, Brazil
| | - Camila T M do Nascimento
- Departamento de Bioquimica e Biologia Molecular, Universidade Federal do Ceara, Centro de Ciencias, Bloco 907, Campus do Pici. Fortaleza, Ceara, CEP 60440-900, Brazil
| | - Maria Z R Silva
- Departamento de Bioquimica e Biologia Molecular, Universidade Federal do Ceara, Centro de Ciencias, Bloco 907, Campus do Pici. Fortaleza, Ceara, CEP 60440-900, Brazil
| | - Eduardo H S Bezerra
- Departamento de Bioquimica e Biologia Molecular, Universidade Federal do Ceara, Centro de Ciencias, Bloco 907, Campus do Pici. Fortaleza, Ceara, CEP 60440-900, Brazil
| | - Bruno A M Rocha
- Departamento de Bioquimica e Biologia Molecular, Universidade Federal do Ceara, Centro de Ciencias, Bloco 907, Campus do Pici. Fortaleza, Ceara, CEP 60440-900, Brazil
| | - Thalles B Grangeiro
- Departamento de Biologia, Fortaleza, Universidade Federal de Ceara, Ceara, Brazil
| | - João P B de Oliveira
- Departamento de Bioquimica e Biologia Molecular, Universidade Federal do Ceara, Centro de Ciencias, Bloco 907, Campus do Pici. Fortaleza, Ceara, CEP 60440-900, Brazil
| | - Pedro F Noronha Souza
- Departamento de Bioquimica e Biologia Molecular, Universidade Federal do Ceara, Centro de Ciencias, Bloco 907, Campus do Pici. Fortaleza, Ceara, CEP 60440-900, Brazil
| | - Márcio V Ramos
- Departamento de Bioquimica e Biologia Molecular, Universidade Federal do Ceara, Centro de Ciencias, Bloco 907, Campus do Pici. Fortaleza, Ceara, CEP 60440-900, Brazil
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17
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Kashyap H, Gupta S, Bist R. Impact of Active Antihyperglycemic Components as Herbal Therapy for Preventive Health Care Management of Diabetes. Curr Mol Med 2020; 19:12-19. [PMID: 30806316 DOI: 10.2174/1566524019666190219124301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 01/24/2019] [Accepted: 01/24/2019] [Indexed: 01/21/2023]
Abstract
Diabetes is a metabolic hyperglycemic condition that progressively develops, effect small and large sensory fibers in the affected population. It has various complications as hypertension, coronary artery disease, stroke, blindness, kidney disease as well as peripheral neuropathy. Sulfonylureas, thiazolidinediones, metformin, biguanidine, acarbose and insulin are commonly used drugs for diabetic patients, but these all have certain side effects. Even metformin, that is known as the miracle drug for diabetes has been found to be associated with side effects, as during treatment it involves complications with eyes, kidneys, peripheral nerves, heart and vasculature. In the present article, we hypothesize recent discoveries with respect to active ingredients from Indian medicinal plants i.e., polypeptide-p (protein analogue act as artificial insulin), charantin (a steroidal saponin), momordicin (an alkaloid) and osmotin (ubiquitous plant protein and animal analogue of human adeponectin) possessing anti-hyperglycemic potential for diabetes type II. Therefore, plants as herbal therapy have preventive care of hyperglycemia accompanied with healthy lifestyle which can provide significant decline in the incidences of diabetes in future.
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Affiliation(s)
- Harsha Kashyap
- Department of Bioscience and Biotechnology, Banasthali Vidyapith, Rajasthan, 304022, India
| | - Sarika Gupta
- Department of Bioscience and Biotechnology, Banasthali Vidyapith, Rajasthan, 304022, India
| | - Renu Bist
- Department of Bioscience and Biotechnology, Banasthali Vidyapith, Rajasthan, 304022, India
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18
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Liu Y, Zhang Y, Peng J, Wang H, Li X, Li X, Rong X, Pan J, Peng Y. Autophagy alleviates ethanol-induced memory impairment in association with anti-apoptotic and anti-inflammatory pathways. Brain Behav Immun 2019; 82:63-75. [PMID: 31376498 DOI: 10.1016/j.bbi.2019.07.033] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 07/28/2019] [Accepted: 07/30/2019] [Indexed: 12/15/2022] Open
Abstract
Chronic excessive drinking leads to a wide spectrum of neurological disorders, including cognitive deficits, such as learning and memory impairment. However, the neurobiological mechanisms underlying these deleterious changes are still poorly understood. We conducted a comprehensive study to investigate the role and mechanism of autophagy in alcohol-induced memory impairment. To establish an ethanol-induced memory impairment mouse model, we allowed C57BL/6J mice intermittent access to 20% ethanol (four-bottle choice) to escalate ethanol drinking levels. Memory impairment was confirmed by a Morris water maze test. We found that mice exposed to EtOH (ethanol) and EtOH combined with the autophagy inhibitor 3-methyladenine (3-MA) showed high alcohol intake and blood alcohol concentration. We confirmed that the EtOH group exhibited notable memory impairment. Inhibition of autophagy by 3-MA worsened ethanol-induced memory impairment. Ethanol induced autophagy in the hippocampus of mice as indicated by western blotting, electron microscopy, RT-qPCR, and fluorescence confocal microscopy. We determined that the mTOR/BECN1 (S14) pathway is involved in ethanol-induced autophagy in vivo. Further, ethanol-induced autophagy suppressed the NLRP3 inflammatory and apoptosis pathways in the hippocampus in mice and in vitro. These findings suggest that autophagy activation in hippocampal cells alleviates ethanol-induced memory impairment in association with anti-apoptotic and anti-inflammatory pathways.
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Affiliation(s)
- Yunyun Liu
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Yuanpei Zhang
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Jialing Peng
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Hongxuan Wang
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Xiangpen Li
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Xiaoyu Li
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Xiaoming Rong
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Jingrui Pan
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Ying Peng
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Guangdong Provincial Key Laboratory of Malignant Tumour Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China.
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Vaghef L, Farajdokht F, Erfani M, Majdi A, Sadigh-Eteghad S, Karimi P, Sandoghchian Shotorbani S, Seyedi Vafaee M, Mahmoudi J. Cerebrolysin attenuates ethanol-induced spatial memory impairments through inhibition of hippocampal oxidative stress and apoptotic cell death in rats. Alcohol 2019; 79:127-135. [PMID: 30981808 DOI: 10.1016/j.alcohol.2019.03.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 03/23/2019] [Accepted: 03/27/2019] [Indexed: 02/07/2023]
Abstract
The present study investigates the potential neuroprotective effect of cerebrolysin (CBL), a combination of neurotrophic factors, on the cognitive and biochemical alterations induced by chronic ethanol administration in rats. The animals were divided into five groups as follows: control; ethanol (4 g/kg, for 30 days) plus normal saline (Ethanol + NS); ethanol plus CBL 1 mL/kg (Ethanol + CBL 1), ethanol plus CBL 2.5 mL/kg (Ethanol + CBL 2.5); and ethanol plus CBL 5 mL/kg (Ethanol + CBL 5). The Morris water maze (MWM) test was performed to assess cognitive impairment. The status of the lipid peroxidation marker MDA, antioxidant capacity, as well as alterations of the apoptotic factors such as Bcl-2, BAX, and cleaved caspase-9 and -3, were evaluated in the hippocampus. The results showed that CBL treatment not only normalized the increased MDA levels in the alcoholic rats and enhanced antioxidant defense, but also reduced the Bax/Bcl-2 ratio and cleaved caspase-9 and -3 in the hippocampus. These results were parallel with improvement in spatial memory performance in the MWM test. The findings of the present study provide evidence for the promising therapeutic effect of CBL in chronic ethanol consumption through counteracting oxidative stress and apoptosis markers.
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Ikram M, Saeed K, Khan A, Muhammad T, Khan MS, Jo MG, Rehman SU, Kim MO. Natural Dietary Supplementation of Curcumin Protects Mice Brains against Ethanol-Induced Oxidative Stress-Mediated Neurodegeneration and Memory Impairment via Nrf2/TLR4/RAGE Signaling. Nutrients 2019; 11:E1082. [PMID: 31096703 PMCID: PMC6566393 DOI: 10.3390/nu11051082] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 05/09/2019] [Accepted: 05/14/2019] [Indexed: 12/24/2022] Open
Abstract
The aim of the current study was to explore the underlying neuroprotective mechanisms of curcumin (50 mg/kg, for six weeks) against ethanol (5 mg/kg i.p., for six weeks) induced oxidative stress and inflammation-mediated cognitive dysfunction in mice. According to our findings, ethanol triggered reactive oxygen species (ROS), apoptosis, neuroinflammation, and memory impairment, which were significantly inhibited with the administration of curcumin, as assessed by ROS, lipid peroxidation (LPO), and Nrf2/HO-1 (nuclear factor erythroid 2-related factor 2/Heme-oxygenase-1) expression in the experimental mice brains. Moreover, curcumin regulated the expression of the glial cell markers in ethanol-treated mice brains, as analyzed by the relative expression TLR4 (Toll like Receptor 4), RAGE (Receptor for Advanced Glycations End products), GFAP (Glial fibrillary acidic protein), and Iba-1 (Ionized calcium binding adaptor molecule 1), through Western blot and confocal microscopic analysis. Moreover, our results showed that curcumin downregulated the expression of p-JNK (Phospo c-Jun N-Terminal Kinase), p-NF-kB (nuclear factor kappa-light-chain-enhancer of activated B cells), and its downstream targets, as assessed by Western blot and confocal microscopic analysis. Finally, the expression of synaptic proteins and the behavioral results also supported the hypothesis that curcumin may inhibit memory dysfunction and behavioral alterations associated with ethanol intoxication. Altogether, to the best of our knowledge, we believe that curcumin may serve as a potential, promising, and cheaply available neuroprotective compound against ethanol-associated neurodegenerative diseases.
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Affiliation(s)
- Muhammad Ikram
- Division of Applied Life Science (BK 21), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea.
| | - Kamran Saeed
- Division of Applied Life Science (BK 21), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea.
| | - Amjad Khan
- Division of Applied Life Science (BK 21), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea.
| | - Tahir Muhammad
- Division of Applied Life Science (BK 21), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea.
| | - Muhammad Sohail Khan
- Division of Applied Life Science (BK 21), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea.
| | - Min Gi Jo
- Division of Applied Life Science (BK 21), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea.
| | - Shafiq Ur Rehman
- Division of Applied Life Science (BK 21), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea.
| | - Myeong Ok Kim
- Division of Applied Life Science (BK 21), College of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea.
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21
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Abid NB, Naseer MI, Kim MO. Comparative Gene-Expression Analysis of Alzheimer's Disease Progression with Aging in Transgenic Mouse Model. Int J Mol Sci 2019; 20:ijms20051219. [PMID: 30862043 PMCID: PMC6429175 DOI: 10.3390/ijms20051219] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 03/03/2019] [Accepted: 03/06/2019] [Indexed: 12/12/2022] Open
Abstract
Alzheimer’s disease (AD) is a multifactorial neurodegenerative disorder characterized by progressive memory dysfunction and a decline in cognition. One of the biggest challenges to study the pathological process at a molecular level is that there is no simple, cost-effective, and comprehensive gene-expression analysis tool. The present study provides the most detailed (Reverse transcription polymerase chain reaction) RT-PCR-based gene-expression assay, encompassing important genes, based on the Kyoto Encyclopedia of Genes and Genomes (KEGG) disease pathway. This study analyzed age-dependent disease progression by focusing on pathological events such as the processing of the amyloid precursor protein, tau pathology, mitochondrial dysfunction, endoplasmic reticulum stress, disrupted calcium signaling, inflammation, and apoptosis. Messenger RNA was extracted from the cortex and hippocampal region of APP/PS1 transgenic mice. Samples were divided into three age groups, six-, nine-, and 12-month-old transgenic mice, and they were compared with normal C57BL/6J mice of respective age groups. Findings of this study provide the opportunity to design a simple, effective, and accurate clinical analysis tool that can not only provide deeper insight into the disease, but also act as a clinical diagnostic tool for its better diagnosis.
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Affiliation(s)
- Noman Bin Abid
- Division of Life Science and Applied Life Science (BK 21), College of Natural Sciences, Gyeongsang National University, Jinju 660-701, Korea.
| | - Muhammad Imran Naseer
- Center of Excellence in Genomic Medicine Research, Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
| | - Myeong Ok Kim
- Division of Life Science and Applied Life Science (BK 21), College of Natural Sciences, Gyeongsang National University, Jinju 660-701, Korea.
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22
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Saito M, Saito M, Das BC. Involvement of AMP-activated protein kinase in neuroinflammation and neurodegeneration in the adult and developing brain. Int J Dev Neurosci 2019; 77:48-59. [PMID: 30707928 DOI: 10.1016/j.ijdevneu.2019.01.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 12/29/2018] [Accepted: 01/28/2019] [Indexed: 02/07/2023] Open
Abstract
Microglial activation followed by neuroinflammation is a defense mechanism of the brain to eliminate harmful endogenous and exogenous materials including pathogens and damaged tissues, while excessive or chronic neuroinflammation may cause or exacerbate neurodegeneration observed in brain injuries and neurodegenerative diseases. Depending on conditions/environments during activation, microglia acquire distinct phenotypes, such as pro-inflammatory, anti-inflammatory, and disease-associated phenotypes, and show their ability to phagocytose various objects and produce pro-and anti-inflammatory mediators. Prevention of excessive inflammation by regulating the microglia's pro/anti-inflammatory balance is important for alleviating progression of brain injuries and diseases. Among many factors involved in the regulation of microglial phenotypes, cellular energy status plays an important role. Adenosine monophosphate-activated protein kinase (AMPK), which serves as a master sensor and regulator of energy balance, is considered a candidate molecule. Accumulating evidence from adult rodent studies indicates that AMPK activation promotes anti-inflammatory responses in microglia exposed to danger signals or various stressors mainly through inhibition of the nuclear factor κB (NF-κB) signaling and activation of the nuclear factor erythroid-2-related factor-2 (Nrf2) pathway. However, AMPK activation in neurons exposed to stressors/insults may exacerbate neuronal damage if AMPK activation is excessive or prolonged. While AMPK affects microglial activation states and neuronal cell survival rates in both the adult and the developing brain, studies in the developing brain are still scarce, even though activated AMPK is highly expressed especially in the neonatal brain. More in depth studies in the developing brain are important, because neuroinflammation/neurodegeneration occurred during development can result in long-lasting brain damage.
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Affiliation(s)
- Mariko Saito
- Division of Neurochemistry, Nathan S. Kline Institute for Psychiatric Research, 140 Old Orangeburg, Orangeburg, NY, 10962, USA.,Department of Psychiatry, New York University Langone Medical Center, 550 First Avenue, New York, NY, 10016, USA
| | - Mitsuo Saito
- Division of Analytical Psychopharmacology, Nathan S. Kline Institute for Psychiatric Research, 140 Old Orangeburg, Orangeburg, NY, 10962, USA
| | - Bhaskar C Das
- Departments of Medicine and Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, 1468 Madison Avenue, Annenberg 19-201, New York, NY, 10029, USA
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23
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Jakaria M, Park SY, Haque ME, Karthivashan G, Kim IS, Ganesan P, Choi DK. Neurotoxic Agent-Induced Injury in Neurodegenerative Disease Model: Focus on Involvement of Glutamate Receptors. Front Mol Neurosci 2018; 11:307. [PMID: 30210294 PMCID: PMC6123546 DOI: 10.3389/fnmol.2018.00307] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 08/13/2018] [Indexed: 12/13/2022] Open
Abstract
Glutamate receptors play a crucial role in the central nervous system and are implicated in different brain disorders. They play a significant role in the pathogenesis of neurodegenerative diseases (NDDs) such as Alzheimer's disease, Parkinson's disease, and amyotrophic lateral sclerosis. Although many studies on NDDs have been conducted, their exact pathophysiological characteristics are still not fully understood. In in vivo and in vitro models of neurotoxic-induced NDDs, neurotoxic agents are used to induce several neuronal injuries for the purpose of correlating them with the pathological characteristics of NDDs. Moreover, therapeutic drugs might be discovered based on the studies employing these models. In NDD models, different neurotoxic agents, namely, kainic acid, domoic acid, glutamate, β-N-Methylamino-L-alanine, amyloid beta, 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine, 1-methyl-4-phenylpyridinium, rotenone, 3-Nitropropionic acid and methamphetamine can potently impair both ionotropic and metabotropic glutamate receptors, leading to the progression of toxicity. Many other neurotoxic agents mainly affect the functions of ionotropic glutamate receptors. We discuss particular neurotoxic agents that can act upon glutamate receptors so as to effectively mimic NDDs. The correlation of neurotoxic agent-induced disease characteristics with glutamate receptors would aid the discovery and development of therapeutic drugs for NDDs.
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Affiliation(s)
- Md. Jakaria
- Department of Applied Life Sciences, Graduate School, Konkuk University, Chungju, South Korea
| | - Shin-Young Park
- Department of Applied Life Sciences, Graduate School, Konkuk University, Chungju, South Korea
| | - Md. Ezazul Haque
- Department of Applied Life Sciences, Graduate School, Konkuk University, Chungju, South Korea
| | - Govindarajan Karthivashan
- Department of Integrated Bioscience and Biotechnology, College of Biomedical and Health Sciences, Research Institute of Inflammatory Diseases (RID), Konkuk University, Chungju, South Korea
| | - In-Su Kim
- Department of Integrated Bioscience and Biotechnology, College of Biomedical and Health Sciences, Research Institute of Inflammatory Diseases (RID), Konkuk University, Chungju, South Korea
| | - Palanivel Ganesan
- Department of Integrated Bioscience and Biotechnology, College of Biomedical and Health Sciences, Research Institute of Inflammatory Diseases (RID), Konkuk University, Chungju, South Korea
- Nanotechnology Research Center, Konkuk University, Chungju, South Korea
| | - Dong-Kug Choi
- Department of Applied Life Sciences, Graduate School, Konkuk University, Chungju, South Korea
- Department of Integrated Bioscience and Biotechnology, College of Biomedical and Health Sciences, Research Institute of Inflammatory Diseases (RID), Konkuk University, Chungju, South Korea
- Nanotechnology Research Center, Konkuk University, Chungju, South Korea
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24
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Song S, Fajol A, Chen Y, Ren B, Shi S. Anticonvulsive effects of protodioscin against pilocarpine-induced epilepsy. Eur J Pharmacol 2018; 833:237-246. [PMID: 29886239 DOI: 10.1016/j.ejphar.2018.06.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 06/05/2018] [Accepted: 06/06/2018] [Indexed: 11/17/2022]
Abstract
Epilepsy is associated with increased morbidity and mortality together and places a large financial burden on individuals and society. To evaluate the anticonvulsant action of protodioscin (PDSN) in experiments with animals with pilocarpine-induced convulsions. We assessed the activity of PDSN in pilocarpine induced seizures in combination with different agents which are acting via diverse receptors, such as atropine, memantine, nimodipine, diazepam, and flumazenil, to determine the exact receptors responsible for the action of PDSN. Furthermore, the level of antioxidant markers was investigated in the cerebellum and cerebral cortex in mice to define the antioxidant action of PDSN. The effects of PDSN on proapoptotic markers (i.e., Bcl-2, Bax, and caspase-3) was investigated via western blot analysis. PDSN significantly enhanced latency to the first convulsion and survival compared to the group treated with pilocarpine alone. Moreover, PDSN improved animal survival, and subjects experiencing no convulsions. Striatal glutamate and aspartate levels were not modified, and gamma amino butyric acid (GABA) levels increased, as a result of treatment with PDSN. The results suggest that the anticonvulsive action of PDSN is dependent on inhibitory amino acids. PDSN treatment also significantly decreased nitrite levels in the blood and brain cortex compared to the normal control. In the western blot analysis, PDSN exerted its neuroprotective effect via the upregulation of Bcl-2 and downregulation of Bax and caspase-3. The results of this study suggest that PDSN exerts neuroprotective effects via multiple mechanisms.
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Affiliation(s)
- Shiwei Song
- Department of Neurosurgery, Fujian Medical University Affiliated Union Hospital, Fujian Neurosurgical Institute, Fuzhou 350001, China.
| | - Abul Fajol
- Department of Neurosurgery, Fujian Medical University Affiliated Union Hospital, Fujian Neurosurgical Institute, Fuzhou 350001, China
| | - Yan Chen
- Department of Neurosurgery, Fujian Medical University Affiliated Union Hospital, Fujian Neurosurgical Institute, Fuzhou 350001, China
| | - Baogang Ren
- Department of Neurosurgery, Fujian Medical University Affiliated Union Hospital, Fujian Neurosurgical Institute, Fuzhou 350001, China
| | - Songsheng Shi
- Department of Neurosurgery, Fujian Medical University Affiliated Union Hospital, Fujian Neurosurgical Institute, Fuzhou 350001, China
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25
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Takahashi Y, Watanabe R, Sato Y, Ozawa N, Kojima M, Watanabe-Kominato K, Shirai R, Sato K, Hirano T, Watanabe T. Novel phytopeptide osmotin mimics preventive effects of adiponectin on vascular inflammation and atherosclerosis. Metabolism 2018; 83:128-138. [PMID: 29410350 DOI: 10.1016/j.metabol.2018.01.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 12/08/2017] [Accepted: 01/17/2018] [Indexed: 02/07/2023]
Abstract
INTRODUCTION The novel phytohormone, osmotin, has been reported to act like mammalian adiponectin through PHO36/AdipoR1 in various in vitro and in vivo models. However, there have been no reports regarding the precise effects of osmotin on atherosclerosis. METHODS We assessed the atheroprotective effects of osmotin on inflammatory molecules in human umbilical vein endothelial cells (HUVECs), human leukemic monocyte (THP-1) adhesion, inflammatory responses, and foam cell formation in THP-1-derived macrophages, and the migration, proliferation, and extracellular matrix expression in human aortic smooth muscle cells (HASMCs). We examined whether 4-week infusion of osmotin could suppress the development of aortic atherosclerotic lesions in apolipoprotein E-deficient (ApoE-/-) mice. RESULTS AdipoR1 was abundantly expressed in HUVECs, HASMCs, THP-1, and derived macrophages. Osmotin suppressed lipopolysaccharide-induced upregulation of tumor necrosis factor-α (TNF-α), monocyte chemotactic protein-1, vascular cell adhesion molecule-1, intercellular adhesion molecule-1, and E-selectin in HUVECs, and TNF-α-induced THP-1-HUVEC adhesion. In THP-1-derived macrophages, osmotin suppressed the inflammatory M1 phenotype, lipopolysaccharide-induced secretion of interleukin-6 and TNF-α, and oxidized low-density lipoprotein-induced foam cell formation associated with CD36 and acyl-CoA:cholesterol acyltransferase 1 downregulation and ATP-binding cassette transporter A1 upregulation. In HASMCs, osmotin suppressed angiotensin II-induced migration, proliferation, collagen-1 and fibronectin expression, and matrix metalloproteinase-2 activity without inducing apoptosis. Infusion of osmotin into ApoE-/- mice prevented the development of aortic atherosclerotic lesions with reductions of intraplaque pentraxin-3 expression, fasting plasma glucose, and insulin resistance. CONCLUSIONS This study provided the first evidence that osmotin exerts preventive effects on vascular inflammation and atherosclerosis, which may facilitate the development of new therapeutic modalities for combating atherosclerosis and related diseases.
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Affiliation(s)
- Yui Takahashi
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo 192-0392, Japan
| | - Rena Watanabe
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo 192-0392, Japan
| | - Yuki Sato
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo 192-0392, Japan
| | - Nana Ozawa
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo 192-0392, Japan
| | - Miho Kojima
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo 192-0392, Japan
| | - Kaho Watanabe-Kominato
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo 192-0392, Japan
| | - Remina Shirai
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo 192-0392, Japan
| | - Kengo Sato
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo 192-0392, Japan
| | - Tsutomu Hirano
- Division of Diabetes, Metabolism, and Endocrinology, Department of Medicine, Showa University School of Medicine, Tokyo 142-8666, Japan
| | - Takuya Watanabe
- Laboratory of Cardiovascular Medicine, Tokyo University of Pharmacy and Life Sciences, Tokyo 192-0392, Japan.
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26
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Xu N, Zhang Y, Doycheva DM, Ding Y, Zhang Y, Tang J, Guo H, Zhang JH. Adiponectin attenuates neuronal apoptosis induced by hypoxia-ischemia via the activation of AdipoR1/APPL1/LKB1/AMPK pathway in neonatal rats. Neuropharmacology 2018; 133:415-428. [PMID: 29486166 DOI: 10.1016/j.neuropharm.2018.02.024] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 02/15/2018] [Accepted: 02/23/2018] [Indexed: 02/03/2023]
Abstract
Adiponectin is an important adipocyte-derived plasma protein that has beneficial effects on cardio- and cerebrovascular diseases. A low level of plasma Adiponectin is associated with increased mortality post ischemic stroke; however, little is known about the causal role of Adiponectin as well as its molecular mechanisms in neonatal hypoxia ischemia (HI). In the present study, ten-day-old rat pups were subjected to right common carotid artery ligation followed by 2.5 h hypoxia. Recombinant human Adiponectin (rh-Adiponectin) was administered intranasally 1 h post HI. Adiponectin Receptor 1 (AdipoR1) siRNA, APPL1 siRNA, LKB1 siRNA were administered through intracerebroventricular injection 48 h before HI. Brain infarct area measurement, neurological function test, western blot, Fluoro Jade C (FJC), TUNEL, and immunofluorescence staining were conducted. Results revealed that endogenous Adiponectin, AdipoR1 and APPL1 were increased in a time dependent manner after HI. Administration of rh-Adiponectin reduced brain infarct area, neuronal apoptosis, brain atrophy and improved neurological function at 24 h and 4 weeks post HI. Furthermore, rh-Adiponectin treatment increased Adiponectin, AdipoR1, APPL1, cytosolic LKB1, p-AMPK expression levels and thereby attenuated apoptosis as shown by the decreased expression of the pro-apoptotic marker, Cleaved Caspase 3 (C-Cas3), as well as the number of FJC and TUNEL positively stained neurons. AdipoR1, APPL1 and LKB1 siRNAs abolished the anti-apoptotic effects of rh-Adiponectin at 24 h after HI. Collectively, the data provided evidence that intranasal administration of rh-Adiponectin attenuated neuronal apoptosis at least in part via activating AdipoR1/APPL1/LKB1/AMPK signaling pathway. Adiponectin could represent a therapeutic target for treatment of neonatal hypoxic ischemic encephalopathy.
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MESH Headings
- AMP-Activated Protein Kinase Kinases
- Adaptor Proteins, Signal Transducing/genetics
- Adaptor Proteins, Signal Transducing/metabolism
- Adiponectin/therapeutic use
- Animals
- Animals, Newborn
- Apoptosis/drug effects
- Body Weight/drug effects
- Brain Infarction/drug therapy
- Brain Infarction/etiology
- Caspase 3/metabolism
- Disease Models, Animal
- Dose-Response Relationship, Drug
- Escape Reaction/drug effects
- Female
- Fluoresceins/metabolism
- Gene Expression Regulation/drug effects
- Gene Expression Regulation/genetics
- Hypoxia-Ischemia, Brain/drug therapy
- Hypoxia-Ischemia, Brain/pathology
- In Situ Nick-End Labeling
- Male
- Nerve Tissue Proteins/genetics
- Nerve Tissue Proteins/metabolism
- Neurologic Examination
- Neurons/drug effects
- Protein Kinases/genetics
- Protein Kinases/metabolism
- Protein Serine-Threonine Kinases/genetics
- Protein Serine-Threonine Kinases/metabolism
- RNA, Small Interfering/pharmacology
- Rats
- Rats, Sprague-Dawley
- Receptors, Adiponectin/genetics
- Receptors, Adiponectin/metabolism
- Reflex/drug effects
- Signal Transduction/drug effects
- Signal Transduction/genetics
- Statistics, Nonparametric
- Swimming/physiology
- Time Factors
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Affiliation(s)
- Ningbo Xu
- The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China; Department of Physiology and Pharmacology, Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92354, USA
| | - Yixin Zhang
- Department of Physiology and Pharmacology, Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92354, USA
| | - Desislava Met Doycheva
- Department of Physiology and Pharmacology, Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92354, USA
| | - Yan Ding
- Department of Physiology and Pharmacology, Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92354, USA
| | - Yiting Zhang
- Department of Physiology and Pharmacology, Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92354, USA
| | - Jiping Tang
- Department of Physiology and Pharmacology, Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92354, USA
| | - Hongbo Guo
- The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China.
| | - John H Zhang
- Department of Physiology and Pharmacology, Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92354, USA; Department of Anesthesiology, Neurosurgery and Neurology, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA.
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27
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Li X, Guo H, Zhao L, Wang B, Liu H, Yue L, Bai H, Jiang H, Gao L, Feng D, Qu Y. Adiponectin attenuates NADPH oxidase-mediated oxidative stress and neuronal damage induced by cerebral ischemia-reperfusion injury. Biochim Biophys Acta Mol Basis Dis 2017; 1863:3265-3276. [DOI: 10.1016/j.bbadis.2017.08.010] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 07/12/2017] [Accepted: 08/09/2017] [Indexed: 10/19/2022]
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28
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Zhang Y, Liu B, Chen X, Zhang N, Li G, Zhang LH, Tan LY. Naringenin Ameliorates Behavioral Dysfunction and Neurological Deficits in a d-Galactose-Induced Aging Mouse Model Through Activation of PI3K/Akt/Nrf2 Pathway. Rejuvenation Res 2017. [DOI: 10.1089/rej.2017.1960] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Affiliation(s)
- Yan Zhang
- Jiamusi College, Heilongjiang University of Chinese Medicine, Jiamusi, China
| | - Bin Liu
- Jiamusi College, Heilongjiang University of Chinese Medicine, Jiamusi, China
| | - Xi Chen
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- Yunnan Branch, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Jing Hong, China
| | - Ning Zhang
- Jiamusi College, Heilongjiang University of Chinese Medicine, Jiamusi, China
| | - Guang Li
- Yunnan Branch, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Jing Hong, China
| | - Li-Hong Zhang
- Jiamusi College, Heilongjiang University of Chinese Medicine, Jiamusi, China
| | - Li-Yan Tan
- Department of Endocrinology, The First Affiliated Hospital of Jiamusi University, Jiamusi, China
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29
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Kim MW, Abid NB, Jo MH, Jo MG, Yoon GH, Kim MO. Suppression of adiponectin receptor 1 promotes memory dysfunction and Alzheimer's disease-like pathologies. Sci Rep 2017; 7:12435. [PMID: 28963462 PMCID: PMC5622055 DOI: 10.1038/s41598-017-12632-9] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 09/08/2017] [Indexed: 02/06/2023] Open
Abstract
Recent studies on neurodegeneration have focused on dysfunction of CNS energy metabolism as well as proteinopathies. Adiponectin (ADPN), an adipocyte-derived hormone, plays a major role in the regulation of insulin sensitivity and glucose homeostasis in peripheral organs via adiponectin receptors. In spite of accumulating evidence that adiponectin has neuroprotective properties, the underlying role of adiponectin receptors has not been illuminated. Here, using gene therapy-mediated suppression with shRNA, we found that adiponectin receptor 1 (AdipoR1) suppression induces neurodegeneration as well as metabolic dysfunction. AdipoR1 knockdown mice exhibited increased body weight and abnormal plasma chemistry and also showed spatial learning and memory impairment in behavioural studies. Moreover, AdipoR1 suppression resulted in neurodegenerative phenotypes, diminished expression of the neuronal marker NeuN, and increased expression and activity of caspase 3. Furthermore, AD-like pathologies including insulin signalling dysfunction, abnormal protein aggregation and neuroinflammatory responses were highly exhibited in AdipoR1 knockdown groups, consistent with brain pathologies in ADPN knockout mice. Together, these results suggest that ADPN-AdipoR1 signalling has the potential to alleviate neurodegenerative diseases such as Alzheimer’s diseases.
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Affiliation(s)
- Min Woo Kim
- Division of Life Science and Applied Life Science (BK 21 plus), College of Natural Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - Noman Bin Abid
- Division of Life Science and Applied Life Science (BK 21 plus), College of Natural Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - Myeong Hoon Jo
- Division of Life Science and Applied Life Science (BK 21 plus), College of Natural Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - Min Gi Jo
- Division of Life Science and Applied Life Science (BK 21 plus), College of Natural Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - Gwang Ho Yoon
- Division of Life Science and Applied Life Science (BK 21 plus), College of Natural Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - Myeong Ok Kim
- Division of Life Science and Applied Life Science (BK 21 plus), College of Natural Sciences, Gyeongsang National University, Jinju, Republic of Korea.
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30
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Liu J, Sui H, Zhao J, Wang Y. Osmotin Protects H9c2 Cells from Simulated Ischemia-Reperfusion Injury through AdipoR1/PI3K/AKT Signaling Pathway. Front Physiol 2017; 8:611. [PMID: 28993734 PMCID: PMC5622187 DOI: 10.3389/fphys.2017.00611] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 08/09/2017] [Indexed: 01/04/2023] Open
Abstract
Objective: This study aimed to investigate the effect of osmotin on myocardial ischemia/reperfusion (I/R), as well as the underlying mechanisms. Methods:In vitro I/R injury model was established on rat cardiac myoblast H9c2 cells by oxygen and glucose deprivation followed by reperfusion (OGD/R). Cells were administrated with osmotin, and transfected with small interfering RNAs (siRNAs) which specifically target adiponectin receptor 1 or 2 (AdipoR1/2). Besides, the cells were incubated with or without LY294002 as inhibitor of phosphatidylinositol 3-kinase (PI3K) under OGD/R condition. Cell viability, apoptosis, expressions of apoptosis-related proteins and inflammatory factors were analyzed. Results: The results showed that osmotin significantly increased H9c2 cells viability compared with the cells treated with vehicle (P < 0.05), and decreased H9c2 cells apoptosis by regulating expressions of apoptosis-related proteins. Moreover, we observed that osmotin statistically reduced the release of proinflammatory factors and increased the release of anti-inflammatory factors in H9c2 cells (P < 0.05). However, these effects were markedly reversed by AdipoR1 silence but not AdipoR2. Furthermore, osmotin dramatically upregulated the phosphorylation levels of PI3K, AKT, ERK, and downregulated the phosphorylation level of NF-κB (P < 0.05). While administration of LY294002 reduced cell viability, increased cell apoptosis, and aggravated inflammatory response (P < 0.05). Conclusion: Our results suggested that the protective effect of osmotin on the simulated OGD/R injured H9c2 cells might be associated with AdipoR1/PI3K/AKT signaling pathway.
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Affiliation(s)
- Jianhua Liu
- Department of Cardiology, Xinxiang Central HospitalXinxiang, Henan, China
| | - Hua Sui
- Department of Endocrinology, Xinxiang Central HospitalXinxiang, Henan, China
| | - Jianlin Zhao
- Department of Endocrinology, Xinxiang Central HospitalXinxiang, Henan, China
| | - Yan Wang
- Department of Cardiology, Xinxiang Central HospitalXinxiang, Henan, China
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Abid NB, Yoon G, Kim MO. Molecular Cloning and Expression of Osmotin in a Baculovirus-Insect System: Purified Osmotin Mitigates Amyloid-beta Deposition in Neuronal Cells. Sci Rep 2017; 7:8147. [PMID: 28811634 PMCID: PMC5557928 DOI: 10.1038/s41598-017-08396-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 07/11/2017] [Indexed: 12/25/2022] Open
Abstract
Osmotin is a pathogenesis-related plant protein, have gained focus of research because of its homology with mammalian adiponectin. The therapeutic properties of osmotin have been explored in recent years as it exhibits neuroprotective effects against amyloid beta-, glutamate- and ethanol-induced synaptic dysfunction and neurodegeneration. In the present study, the full-length gene of the tobacco plant osmotin was cloned and expressed in the Sf9 insect cell line using the baculovirus expression system. In vitro analysis of purified Osmotin protein showed excellent cell viability, p-AMPK activation and a reduction in amyloid-beta deposition. Immunofluorescent analysis showed significant reduction in amyloid beta deposition in APP over expressing neuronal cells. Osmotin inhibited amyloid beta deposition by influencing expression of APP processing genes including APP, ADAM 10 and BACE 1. Purified Osmotin showed reduction in amyloid beta deposition in different in vitro models as well. Osmotin showed similar mechanism when compared with mammalian adiponectin in different in vitro models. The present method will be an excellent approach for the efficient and cost-effective production of the functional protein to be utilized for therapeutic purposes. Reduction in amyloid beta deposition by activation of p-AMPK influencing APP processing genes makes osmotin a potent therapeutic candidate for neurodegenerative diseases.
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Affiliation(s)
- Noman Bin Abid
- Division of Life Science and Applied Life Science (BK 21), College of Natural Sciences, Gyeongsang National University, Jinju, 660-701, Republic of Korea
| | - Gwangho Yoon
- Division of Life Science and Applied Life Science (BK 21), College of Natural Sciences, Gyeongsang National University, Jinju, 660-701, Republic of Korea
| | - Myeong Ok Kim
- Division of Life Science and Applied Life Science (BK 21), College of Natural Sciences, Gyeongsang National University, Jinju, 660-701, Republic of Korea.
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Amin FU, Hoshiar AK, Do TD, Noh Y, Shah SA, Khan MS, Yoon J, Kim MO. Osmotin-loaded magnetic nanoparticles with electromagnetic guidance for the treatment of Alzheimer's disease. NANOSCALE 2017; 9:10619-10632. [PMID: 28534925 DOI: 10.1039/c7nr00772h] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Alzheimer's disease (AD) is the most prevalent age-related neurodegenerative disease, pathologically characterized by the accumulation of aggregated amyloid beta (Aβ) in the brain. Here, we describe for the first time the development of a new, pioneering nanotechnology-based drug delivery approach for potential therapies for neurodegenerative diseases, particularly AD. We demonstrated the delivery of fluorescent carboxyl magnetic Nile Red particles (FMNPs) to the brains of normal mice using a functionalized magnetic field (FMF) composed of positive- and negative-pulsed magnetic fields generated by electromagnetic coils. The FMNPs successfully reached the brain in a few minutes and showed evidence of blood-brain barrier (BBB) crossing. Moreover, the best FMF conditions were found for inducing the FMNPs to reach the cortex and hippocampus regions. Under the same FMF conditions, dextran-coated Fe3O4 magnetic nanoparticles (MNPs) loaded with osmotin (OMNP) were transported to the brains of Aβ1-42-treated mice. Compared with native osmotin, the OMNP potently attenuates Aβ1-42-induced synaptic deficits, Aβ accumulation, BACE-1 expression and tau hyperphosphorylation. This magnetic drug delivery approach can be extended to preclinical and clinical use and may advance the chances of success in the treatment of neurological disorders like AD in the future.
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Affiliation(s)
- Faiz Ul Amin
- Division of Life Science (BK 21), College of Natural Sciences, Gyeongsang National University (GNU), Jinju, 660-701, Republic of Korea.
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Ramlan NF, Sata NSAM, Hassan SN, Bakar NA, Ahmad S, Zulkifli SZ, Abdullah CAC, Ibrahim WNW. Time dependent effect of chronic embryonic exposure to ethanol on zebrafish: Morphology, biochemical and anxiety alterations. Behav Brain Res 2017; 332:40-49. [DOI: 10.1016/j.bbr.2017.05.048] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 05/04/2017] [Accepted: 05/20/2017] [Indexed: 02/08/2023]
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Myricetin ameliorates scopolamine-induced memory impairment in mice via inhibiting acetylcholinesterase and down-regulating brain iron. Biochem Biophys Res Commun 2017; 490:336-342. [DOI: 10.1016/j.bbrc.2017.06.045] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 06/11/2017] [Indexed: 11/23/2022]
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Shah SA, Yoon GH, Chung SS, Abid MN, Kim TH, Lee HY, Kim MO. Novel osmotin inhibits SREBP2 via the AdipoR1/AMPK/SIRT1 pathway to improve Alzheimer's disease neuropathological deficits. Mol Psychiatry 2017; 22:407-416. [PMID: 27001618 PMCID: PMC5322276 DOI: 10.1038/mp.2016.23] [Citation(s) in RCA: 143] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 02/02/2016] [Accepted: 02/04/2016] [Indexed: 12/22/2022]
Abstract
Extensive evidence has indicated that a high rate of cholesterol biogenesis and abnormal neuronal energy metabolism play key roles in Alzheimer's disease (AD) pathogenesis. Here, for we believe the first time, we used osmotin, a plant protein homolog of mammalian adiponectin, to determine its therapeutic efficacy in different AD models. Our results reveal that osmotin treatment modulated adiponectin receptor 1 (AdipoR1), significantly induced AMP-activated protein kinase (AMPK)/Sirtuin 1 (SIRT1) activation and reduced SREBP2 (sterol regulatory element-binding protein 2) expression in both in vitro and in vivo AD models and in Adipo-/- mice. Via the AdipoR1/AMPK/SIRT1/SREBP2 signaling pathway, osmotin significantly diminished amyloidogenic Aβ production, abundance and aggregation, accompanied by improved pre- and post-synaptic dysfunction, cognitive impairment, memory deficits and, most importantly, reversed the suppression of long-term potentiation in AD mice. Interestingly, AdipoR1, AMPK and SIRT1 silencing not only abolished osmotin capability but also further enhanced AD pathology by increasing SREBP2, amyloid precursor protein (APP) and β-secretase (BACE1) expression and the levels of toxic Aβ production. However, the opposite was true for SREBP2 when silenced using small interfering RNA in APPswe/ind-transfected SH-SY5Y cells. Similarly, osmotin treatment also enhanced the non-amyloidogenic pathway by activating the α-secretase gene that is, ADAM10, in an AMPK/SIRT1-dependent manner. These results suggest that osmotin or osmotin-based therapeutic agents might be potential candidates for AD treatment.
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Affiliation(s)
- S A Shah
- Division of Life Science and Applied Life Science (BK21 Plus), College of Natural Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - G H Yoon
- Division of Life Science and Applied Life Science (BK21 Plus), College of Natural Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - S S Chung
- Department of Physiology, College of Medicine, Yonsei University, Seoul, Republic of Korea
| | - M N Abid
- Division of Life Science and Applied Life Science (BK21 Plus), College of Natural Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - T H Kim
- Division of Life Science and Applied Life Science (BK21 Plus), College of Natural Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - H Y Lee
- Division of Life Science and Applied Life Science (BK21 Plus), College of Natural Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - M O Kim
- Division of Life Science and Applied Life Science (BK21 Plus), College of Natural Sciences, Gyeongsang National University, Jinju, Republic of Korea,Neuroscience Pioneer Research Center, Department of Biology, College of Natural Sciences, Gyeongsang National University, Jinju 660-701, Republic of Korea. E-mail:
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Direct effects of ethanol on neuronal differentiation: An in vitro analysis of viability and morphology. Brain Res Bull 2016; 127:177-186. [PMID: 27679397 DOI: 10.1016/j.brainresbull.2016.09.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 09/22/2016] [Accepted: 09/23/2016] [Indexed: 12/29/2022]
Abstract
The deleterious effects of ethanol (EtOH) on the brain have been widely described, but its effects on the neuronal cytoskeleton during differentiation have not yet been firmly established. In this context, our aim was to investigate the direct effect of EtOH on cortical neurons during the period of differentiation. Primary cultures of cortical neurons obtained from 1-day-old rats were exposed to EtOH after 7days of culture, and viability and morphology were analyzed at structural and ultrastructural levels after 24-h EtOH exposure. EtOH caused a significant reduction of 73±7% in the viability of cultured cortical neurons, by preferentially inducing apoptotic cellular death. This effect was accompanied by an increase in caspase 3 and 9 expression. Furthermore, EtOH induced a reduction in total dendrite length and in the number of dendrites per cell. Ultrastructural studies showed that EtOH increased the number of lipidic vacuoles, lysosomes and multilamellar vesicles and induced a dilated endoplasmatic reticulum lumen and a disorganized Golgi apparatus with a ring-shape appearance. Microtubules showed a disorganized distribution. Apposition between pre- and postsynaptic membranes without a defined synaptic cleft and a delay in presynaptic vesicle organization were also observed. Synaptophysin and PSD95 expression, proteins pre- and postsynaptically located, were reduced in EtOH-exposed cultures. Overall, our study shows that EtOH induces neuronal apoptosis and changes in the cytoskeleton and membrane proteins related with the establishment of mature synapses. These direct effects of EtOH on neurons may partially explain its effects on brain development.
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Badshah H, Ali T, Kim MO. Osmotin attenuates LPS-induced neuroinflammation and memory impairments via the TLR4/NFκB signaling pathway. Sci Rep 2016; 6:24493. [PMID: 27093924 PMCID: PMC4837357 DOI: 10.1038/srep24493] [Citation(s) in RCA: 151] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 03/30/2016] [Indexed: 12/14/2022] Open
Abstract
Toll-like receptor 4 (TLR4) signaling in the brain mediates autoimmune responses and induces neuroinflammation that results in neurodegenerative diseases, such as Alzheimer’s disease (AD). The plant hormone osmotin inhibited lipopolysaccharide (LPS)-induced TLR4 downstream signaling, including activation of TLR4, CD14, IKKα/β, and NFκB, and the release of inflammatory mediators, such as COX-2, TNF-α, iNOS, and IL-1β. Immunoprecipitation demonstrated colocalization of TLR4 and AdipoR1 receptors in BV2 microglial cells, which suggests that osmotin binds to AdipoR1 and inhibits downstream TLR4 signaling. Furthermore, osmotin treatment reversed LPS-induced behavioral and memory disturbances and attenuated LPS-induced increases in the expression of AD markers, such as Aβ, APP, BACE-1, and p-Tau. Osmotin improved synaptic functionality via enhancing the activity of pre- and post-synaptic markers, like PSD-95, SNAP-25, and syntaxin-1. Osmotin also prevented LPS-induced apoptotic neurodegeneration via inhibition of PARP-1 and caspase-3. Overall, our studies demonstrated that osmotin prevented neuroinflammation-associated memory impairment and neurodegeneration and suggest AdipoR1 as a therapeutic target for the treatment of neuroinflammation and neurological disorders, such as AD.
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Affiliation(s)
- Haroon Badshah
- Division of Applied Life Science (BK 21), College of Natural Sciences (RINS), Gyeongsang National University, Jinju, 660-701, Republic of Korea
| | - Tahir Ali
- Division of Applied Life Science (BK 21), College of Natural Sciences (RINS), Gyeongsang National University, Jinju, 660-701, Republic of Korea
| | - Myeong Ok Kim
- Division of Applied Life Science (BK 21), College of Natural Sciences (RINS), Gyeongsang National University, Jinju, 660-701, Republic of Korea
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Peng Y, Liu J, Shi L, Tang Y, Gao D, Long J, Liu J. Mitochondrial dysfunction precedes depression of AMPK/AKT signaling in insulin resistance induced by high glucose in primary cortical neurons. J Neurochem 2016; 137:701-13. [DOI: 10.1111/jnc.13563] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Revised: 01/20/2016] [Accepted: 01/31/2016] [Indexed: 12/22/2022]
Affiliation(s)
- Yunhua Peng
- Center for Mitochondrial Biology and Medicine; Frontier Institute of Science and Technology and The Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology Xi'an Jiaotong University; Xi'an 710049 China
| | - Jing Liu
- Center for Mitochondrial Biology and Medicine; Frontier Institute of Science and Technology and The Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology Xi'an Jiaotong University; Xi'an 710049 China
| | - Le Shi
- Center for Mitochondrial Biology and Medicine; Frontier Institute of Science and Technology and The Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology Xi'an Jiaotong University; Xi'an 710049 China
| | - Ying Tang
- Center for Mitochondrial Biology and Medicine; Frontier Institute of Science and Technology and The Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology Xi'an Jiaotong University; Xi'an 710049 China
| | - Dan Gao
- Center for Mitochondrial Biology and Medicine; Frontier Institute of Science and Technology and The Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology Xi'an Jiaotong University; Xi'an 710049 China
| | - Jiangang Long
- Center for Mitochondrial Biology and Medicine; Frontier Institute of Science and Technology and The Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology Xi'an Jiaotong University; Xi'an 710049 China
| | - Jiankang Liu
- Center for Mitochondrial Biology and Medicine; Frontier Institute of Science and Technology and The Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology Xi'an Jiaotong University; Xi'an 710049 China
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Rugini E, Cristofori V, Silvestri C. Genetic improvement of olive (Olea europaea L.) by conventional and in vitro biotechnology methods. Biotechnol Adv 2016; 34:687-696. [PMID: 26972849 DOI: 10.1016/j.biotechadv.2016.03.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 03/01/2016] [Accepted: 03/07/2016] [Indexed: 11/26/2022]
Abstract
In olive (Olea europaea L.) traditional methods of genetic improvement have up to now produced limited results. Intensification of olive growing requires appropriate new cultivars for fully mechanized groves, but among the large number of the traditional varieties very few are suitable. High-density and super high-density hedge row orchards require genotypes with reduced size, reduced apical dominance, a semi-erect growth habit, easy to propagate, resistant to abiotic and biotic stresses, with reliably high productivity and quality of both fruits and oil. Innovative strategies supported by molecular and biotechnological techniques are required to speed up novel hybridisation methods. Among traditional approaches the Gene Pool Method seems a reasonable option, but it requires availability of widely diverse germplasm from both cultivated and wild genotypes, supported by a detailed knowledge of their genetic relationships. The practice of "gene therapy" for the most important existing cultivars, combined with conventional methods, could accelerate achievement of the main goals, but efforts to overcome some technical and ideological obstacles are needed. The present review describes the benefits that olive and its products may obtain from genetic improvement using state of the art of conventional and unconventional methods, and includes progress made in the field of in vitro techniques. The uses of both traditional and modern technologies are discussed with recommendations.
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Affiliation(s)
- E Rugini
- Department of Agricultural and Forestry Science (DAFNE), University of Tuscia, Via San Camillo de Lellis, 01100 Viterbo, Italy.
| | - V Cristofori
- Department of Agricultural and Forestry Science (DAFNE), University of Tuscia, Via San Camillo de Lellis, 01100 Viterbo, Italy
| | - C Silvestri
- Department of Agricultural and Forestry Science (DAFNE), University of Tuscia, Via San Camillo de Lellis, 01100 Viterbo, Italy
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40
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Anthocyanins Reversed D-Galactose-Induced Oxidative Stress and Neuroinflammation Mediated Cognitive Impairment in Adult Rats. Mol Neurobiol 2016; 54:255-271. [DOI: 10.1007/s12035-015-9604-5] [Citation(s) in RCA: 174] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 12/01/2015] [Indexed: 12/22/2022]
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Ali T, Yoon GH, Shah SA, Lee HY, Kim MO. Osmotin attenuates amyloid beta-induced memory impairment, tau phosphorylation and neurodegeneration in the mouse hippocampus. Sci Rep 2015; 5:11708. [PMID: 26118757 PMCID: PMC4484370 DOI: 10.1038/srep11708] [Citation(s) in RCA: 112] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Accepted: 06/01/2015] [Indexed: 12/22/2022] Open
Abstract
The pathological hallmarks of Alzheimer's disease (AD) include amyloid beta (Aβ) accumulation, neurofibrillary tangle formation, synaptic dysfunction and neuronal loss. In this study, we investigated the neuroprotection of novel osmotin, a plant protein extracted from Nicotiana tabacum that has been considered to be a homolog of mammalian adiponectin. Here, we observed that treatment with osmotin (15 μg/g, intraperitoneally, 4 hr) at 3 and 40 days post-intracerebroventricular injection of Aβ1-42 significantly ameliorated Aβ1-42-induced memory impairment in mice. These results revealed that osmotin reverses Aβ1-42 injection-induced synaptic deficits, Aβ accumulation and BACE-1 expression. Treatment with osmotin also alleviated the Aβ1-42-induced hyperphosphorylation of the tau protein at serine 413 through the regulation of the aberrant phosphorylation of p-PI3K, p-Akt (serine 473) and p-GSK3β (serine 9). Moreover, our western blots and immunohistochemical results indicated that osmotin prevented Aβ1-42-induced apoptosis and neurodegeneration in the Aβ1-42-treated mice. Furthermore, osmotin attenuated Aβ1-42-induced neurotoxicity in vitro.To our knowledge, this study is the first to investigate the neuroprotective effect of a novel osmotin against Aβ1-42-induced neurotoxicity. Our results demonstrated that this ubiquitous plant protein could potentially serve as a novel, promising, and accessible neuroprotective agent against progressive neurodegenerative diseases such as AD.
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Affiliation(s)
- Tahir Ali
- Department of Biology and Applied Life Science (BK 21), College
of Natural Sciences, (RINS), Gyeongsang National University,
Jinju, 660-701, Republic of Korea
| | - Gwang Ho Yoon
- Department of Biology and Applied Life Science (BK 21), College
of Natural Sciences, (RINS), Gyeongsang National University,
Jinju, 660-701, Republic of Korea
| | - Shahid Ali Shah
- Department of Biology and Applied Life Science (BK 21), College
of Natural Sciences, (RINS), Gyeongsang National University,
Jinju, 660-701, Republic of Korea
| | - Hae Young Lee
- Department of Biology and Applied Life Science (BK 21), College
of Natural Sciences, (RINS), Gyeongsang National University,
Jinju, 660-701, Republic of Korea
| | - Myeong Ok Kim
- Department of Biology and Applied Life Science (BK 21), College
of Natural Sciences, (RINS), Gyeongsang National University,
Jinju, 660-701, Republic of Korea
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Anil Kumar S, Hima Kumari P, Shravan Kumar G, Mohanalatha C, Kavi Kishor PB. Osmotin: a plant sentinel and a possible agonist of mammalian adiponectin. FRONTIERS IN PLANT SCIENCE 2015; 6:163. [PMID: 25852715 PMCID: PMC4360817 DOI: 10.3389/fpls.2015.00163] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 03/01/2015] [Indexed: 05/18/2023]
Abstract
Osmotin is a stress responsive antifungal protein belonging to the pathogenesis-related (PR)-5 family that confers tolerance to both biotic and abiotic stresses in plants. Protective efforts of osmotin in plants range from high temperature to cold and salt to drought. It lyses the plasma membrane of the pathogens. It is widely distributed in fruits and vegetables. It is a differentially expressed and developmentally regulated protein that protects the cells from osmotic stress and invading pathogens as well, by structural or metabolic alterations. During stress conditions, osmotin helps in the accumulation of the osmolyte proline, which quenches reactive oxygen species and free radicals. Osmotin expression results in the accumulation of storage reserves and increases the shelf-life of fruits. It binds to a seven-transmembrane-domain receptor-like protein and induces programmed cell death in Saccharomyces cerevisiae through RAS2/cAMP signaling pathway. Adiponectin, produced in adipose tissues of mammals, is an insulin-sensitizing hormone. Strangely, osmotin acts like the mammalian hormone adiponectin in various in vitro and in vivo models. Adiponectin and osmotin, the two receptor binding proteins do not share sequence similarity at the amino acid level, but interestingly they have a similar structural and functional properties. In experimental mice, adiponectin inhibits endothelial cell proliferation and migration, primary tumor growth, and reduces atherosclerosis. This retrospective work examines the vital role of osmotin in plant defense and as a potential targeted therapeutic drug for humans.
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Affiliation(s)
- S. Anil Kumar
- Department of Genetics, Osmania University, HyderabadIndia
| | - P. Hima Kumari
- Department of Genetics, Osmania University, HyderabadIndia
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The neuroprotective role of metformin in advanced glycation end product treated human neural stem cells is AMPK-dependent. Biochim Biophys Acta Mol Basis Dis 2015; 1852:720-31. [PMID: 25595658 DOI: 10.1016/j.bbadis.2015.01.006] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 01/05/2015] [Accepted: 01/08/2015] [Indexed: 12/17/2022]
Abstract
Diabetic neuronal damage results from hyperglycemia followed by increased formation of advanced glycosylation end products (AGEs), which leads to neurodegeneration, although the molecular mechanisms are still not well understood. Metformin, one of the most widely used anti-diabetic drugs, exerts its effects in part by activation of AMP-activated protein kinase (AMPK). AMPK is a critical evolutionarily conserved enzyme expressed in the liver, skeletal muscle and brain, and promotes cellular energy homeostasis and biogenesis by regulating several metabolic processes. While the mechanisms of AMPK as a metabolic regulator are well established, the neuronal role for AMPK is still unknown. In the present study, human neural stem cells (hNSCs) exposed to AGEs had significantly reduced cell viability, which correlated with decreased AMPK and mitochondria associated gene/protein (PGC1α, NRF-1 and Tfam) expressions, as well as increased activation of caspase 3 and 9 activities. Metformin prevented AGEs induced cytochrome c release from mitochondria into cytosol in the hNSCs. Co-treatment with metformin significantly abrogated the AGE-mediated effects in hNSCs. Metformin also significantly rescued hNSCs from AGE-mediated mitochondrial deficiency (lower ATP, D-loop level, mitochondrial mass, maximal respiratory function, COX activity, and mitochondrial membrane potential). Furthermore, co-treatment of hNSCs with metformin significantly blocked AGE-mediated reductions in the expression levels of several neuroprotective genes (PPARγ, Bcl-2 and CREB). These findings extend our understanding of the molecular mechanisms of both AGE-induced neuronal toxicity, and AMPK-dependent neuroprotection by metformin. This study further suggests that AMPK may be a potential therapeutic target for treating diabetic neurodegeneration.
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Zhong Y, Liang Y, Chen J, Li L, Qin Y, Guan E, He D, Wei Y, Xie Y, Xiao Q. Propofol inhibits proliferation and induces neuroapoptosis of hippocampal neurons in vitro via downregulation of NF-κB p65 and Bcl-2 and upregulation of caspase-3. Cell Biochem Funct 2014; 32:720-9. [PMID: 25431245 DOI: 10.1002/cbf.3077] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 10/19/2014] [Accepted: 10/22/2014] [Indexed: 11/06/2022]
Abstract
Propofol is widely used in paediatric anaesthesia and intensive care unit because of its essentially short-acting anaesthetic effect. Recent data have shown that propofol induced neurotoxicity in developing brain. However, the mechanisms are not extremely clear. To gain a better insight into the toxic effects of propofol on hippocampal neurons, we treated cells at the days in vitro 7 (DIV 7), which were prepared from Sprague-Dawley embryos at the 18th day of gestation, with propofol (0.1-1000 μM) for 3 h. A significant decrease in neuronal proliferation and a remarkable increase in neuroapoptosis were observed in DIV 7 hippocampal neurons as measured by 3-(4,5-dimethylthiazole-2-yl)-2,5-diphenyltetrazolium bromide assay and apoptosis assay respectively. Moreover, propofol treatment decreased the nuclear factor kappaB (NF-κB) p65 expression, which was accompanied by a reduction in B-cell lymphoma 2 (Bcl-2) mRNA and protein levels, increased caspase-3 mRNA and activation of caspase-3 protein. These results indicated that downregulation of NF-κB p65 and Bcl-2 were involved in the potential mechanisms of propofol-induced neurotoxicity. This likely led to the caspase-3 activation, triggered apoptosis and inhibited the neuronal growth and proliferation that we have observed in our in vitro systems.
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Affiliation(s)
- Yuling Zhong
- Department of Anesthesiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
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