1
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Wang DTW, Tang TYC, Kuo CT, Yu YT, Chen EHL, Lee MT, Tsai RF, Chen HY, Chiang YW, Chen RPY. Cholesterol twists the transmembrane Di-Gly region of amyloid-precursor protein. PNAS NEXUS 2023; 2:pgad162. [PMID: 37265546 PMCID: PMC10230161 DOI: 10.1093/pnasnexus/pgad162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 05/08/2023] [Indexed: 06/03/2023]
Abstract
Nearly 95% of Alzheimer's disease (AD) occurs sporadically without genetic linkage. Aging, hypertension, high cholesterol content, and diabetes are known nongenomic risk factors of AD. Aggregation of Aβ peptides is an initial event of AD pathogenesis. Aβ peptides are catabolic products of a type I membrane protein called amyloid precursor protein (APP). Aβ40 is the major product, whereas the 2-residue-longer version, Aβ42, induces amyloid plaque formation in the AD brain. Since cholesterol content is one risk factor for sporadic AD, we aimed to explore whether cholesterol in the membrane affects the structure of the APP transmembrane region, thereby modulating the γ-secretase cutting behavior. Here, we synthesized several peptides containing the APP transmembrane region (sequence 693-726, corresponding to the Aβ22-55 sequence) with one or two Cys mutations for spin labeling. We performed three electron spin resonance experiments to examine the structural changes of the peptides in liposomes composed of dioleoyl phosphatidylcholine and different cholesterol content. Our results show that cholesterol increases membrane thickness by 10% and peptide length accordingly. We identified that the di-glycine region of Aβ36-40 (sequence VGGVV) exhibits the most profound change in response to cholesterol compared with other segments, explaining how the presence of cholesterol affects the γ-secretase cutting site. This study provides spectroscopic evidence showing how cholesterol modulates the structure of the APP transmembrane region in a lipid bilayer.
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Affiliation(s)
- David Tzu-Wei Wang
- Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan
- Institute of Biochemical Sciences, National Taiwan University, Taipei 10617, Taiwan
| | - Tiffany Y C Tang
- Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan
| | - Chun-Ting Kuo
- Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan
- Institute of Biochemical Sciences, National Taiwan University, Taipei 10617, Taiwan
| | - Yun-Ting Yu
- Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan
- Institute of Biochemical Sciences, National Taiwan University, Taipei 10617, Taiwan
| | - Eric H L Chen
- Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan
| | - Ming-Tao Lee
- Life Science Group, Scientific Research Division, National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
- Department of Physics, National Central University, Zhongli 320317, Taiwan
| | - Ruei-Fong Tsai
- Department of Chemistry, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Hung-Ying Chen
- Department of Chemistry, National Tsing Hua University, Hsinchu 300044, Taiwan
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2
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Lo WL, Wang YH, Chen EHL, Wang SM, Chen LC, Chen RPY. Biodistribution analysis of an intranasal-delivered peptide by the nanoSPECT/CT imaging. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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3
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Humpel C. Intranasal neprilysin rapidly eliminates amyloid-beta plaques, but causes plaque compensations: the explanation why the amyloid-beta cascade may fail? Neural Regen Res 2022; 17:1881-1884. [PMID: 35142662 PMCID: PMC8848595 DOI: 10.4103/1673-5374.335138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Neurodegenerative brain disorders are a major burden in our society, such as Alzheimer´s disease. In order to repair or prevent such diseases, drugs are designed which enter the brain, but the blood-brain barrier limits their entry and the search for alternative pathways is important. Recently, we reported that intranasal delivery of the amyloid-beta degrading enzyme neprilysin eliminated amyloid-beta plaques in transgenic Alzheimer´s disease mice. This review describes the anatomical structure of the intranasal pathway, explains the intranasal delivery of pure neprilysin, cell-loaded neprilysin (platelets) and collagen-embedded neprilysin to destruct amyloid-beta plaques in Alzheimer´s disease in transgenic APP_SweDI mice and hypothesizes why this may cause compensation and why the amyloid-beta cascade hypothesis may fail.
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Affiliation(s)
- Christian Humpel
- Laboratory of Psychiatry and Experimental Alzheimer's Research, Medical University of Innsbruck, Innsbruck, Austria
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4
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Som Chaudhury S, Sinha K, Das Mukhopadhyay C. Intranasal route: The green corridor for Alzheimer's disease therapeutics. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102791] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Chen EHL, Weng CW, Li YM, Wu MC, Yang CC, Lee KT, Chen RPY, Cheng CP. De Novo Design of Antimicrobial Peptides With a Special Charge Pattern and Their Application in Combating Plant Pathogens. FRONTIERS IN PLANT SCIENCE 2021; 12:753217. [PMID: 34659322 PMCID: PMC8514817 DOI: 10.3389/fpls.2021.753217] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 09/06/2021] [Indexed: 06/13/2023]
Abstract
Plant diseases are important issues in agriculture, and the development of effective and environment-friendly means of disease control is crucial and highly desired. Antimicrobial peptides (AMPs) are known as potential alternatives to chemical pesticides because of their potent broad-spectrum antimicrobial activity and because they have no risk, or have only a low risk, of developing chemical-resistant pathogens. In this study, we designed a series of amphipathic helical peptides with different spatial distributions of positive charges and found that the peptides that had a special sequence pattern "BBHBBHHBBH" ("B" for basic residue and "H" for hydrophobic residue) displayed excellent bactericidal and fungicidal activities in a wide range of economically important plant pathogens. The peptides with higher helical propensity had lower antimicrobial activity. When we modified the peptides with a long acyl chain at their N-terminus, their plant protection effect improved. Our application of the fatty acyl-modified peptides on the leaves of tomato and Arabidopsis plants lessened the infection caused by Pectobacterium carotovorum subsp. carotovorum and Botrytis cinerea. Our study provides important insights on the development of more potent novel AMPs for plant protection.
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Affiliation(s)
- Eric H. -L. Chen
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Cheng-Wei Weng
- Institute of Plant Biology, National Taiwan University, Taipei, Taiwan
| | - Yi-Min Li
- Institute of Plant Biology, National Taiwan University, Taipei, Taiwan
| | - Ming-Chin Wu
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Chien-Chih Yang
- Department of Biochemical Science and Technology, National Taiwan University, Taipei, Taiwan
| | - Kung-Ta Lee
- Department of Biochemical Science and Technology, National Taiwan University, Taipei, Taiwan
| | - Rita P. -Y. Chen
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
- Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | - Chiu-Ping Cheng
- Institute of Plant Biology, National Taiwan University, Taipei, Taiwan
- Department of Life Science, National Taiwan University, Taipei, Taiwan
- Global Agriculture Technology and Genomic Science Master Program, National Taiwan University, Taipei, Taiwan
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6
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Chen SP, Chen EHL, Yang SY, Kuo PS, Jan HM, Yang TC, Hsieh MY, Lee KT, Lin CH, Chen RPY. A Systematic Study of the Stability, Safety, and Efficacy of the de novo Designed Antimicrobial Peptide PepD2 and Its Modified Derivatives Against Acinetobacter baumannii. Front Microbiol 2021; 12:678330. [PMID: 34220763 PMCID: PMC8250858 DOI: 10.3389/fmicb.2021.678330] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 05/27/2021] [Indexed: 12/12/2022] Open
Abstract
Searching for new antimicrobials is a pressing issue to conquer the emergence of multidrug-resistant (MDR) bacteria and fungi. Antimicrobial peptides (AMPs) usually have antimicrobial mechanisms different from those of traditional antibiotics and bring new hope in the discovery of new antimicrobials. In addition to antimicrobial activity, stability and target selectivity are important concerns to decide whether an antimicrobial peptide can be applied in vivo. Here, we used a simple de novo designed peptide, pepD2, which contains only three kinds of amino acid residues (W, K, L), as an example to evaluate how the residues and modifications affect the antimicrobial activity against Acinetobacter baumannii, stability in plasma, and toxicity to human HEK293 cells. We found that pepI2 with a Leu→Ile substitution can decrease the minimum bactericidal concentrations (MBC) against A. baumannii by one half (4 μg/mL). A D-form peptide, pepdD2, in which the D-enantiomers replaced the L-enantiomers of the Lys(K) and Leu(L) residues, extended the peptide half-life in plasma by more than 12-fold. PepD3 is 3-residue shorter than pepD2. Decreasing peptide length did not affect antimicrobial activity but increased the IC50 to HEK293 cells, thus increased the selectivity index (SI) between A. baumannii and HEK293 cells from 4.7 to 8.5. The chain length increase of the N-terminal acyl group and the Lys→Arg substitution greatly enhanced the hemolytic activity, hence those modifications are not good for clinical application. Unlike colistin, the action mechanism of our peptides relies on negatively charged lipids rather than lipopolysaccharides. Therefore, not only gram-negative bacteria but also gram-positive bacteria can be killed by our peptides.
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Affiliation(s)
- Sung-Pang Chen
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | - Eric H-L Chen
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Sheng-Yung Yang
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Pin-Shin Kuo
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | - Hau-Ming Jan
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Tsai-Chen Yang
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Ming-Yen Hsieh
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Kung-Ta Lee
- Department of Biochemical Science and Technology, National Taiwan University, Taipei, Taiwan
| | - Chun-Hung Lin
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | - Rita P-Y Chen
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
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7
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Zhang X, Zhang X, Li Y, Zhong M, Zhao P, Guo C, Xu H, Wang T, Gao H. Brain Targeting and Aβ Binding Bifunctional Nanoparticles Inhibit Amyloid Protein Aggregation in APP/PS1 Transgenic Mice. ACS Chem Neurosci 2021; 12:2110-2121. [PMID: 34042421 DOI: 10.1021/acschemneuro.1c00035] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Alzheimer's disease (AD) is an insidious and progressive neurodegenerative disease with few disease-modifying treatments. A variety of peptide/protein drugs have neuroprotective effects, which brings new hope for the treatment of AD. However, the application of these drugs is limited because of their low specificity and difficulty in crossing the blood-brain barrier. Herein, using the phage display technology, we identified the Aβ oligomer binding peptide (KH) and the brain targeting peptide (IS). We combined these peptides to develop a bifunctional nanoparticle (IS@NP/KH) for the delivery of Aβ1-42 oligomer binding peptide into the brain. Intranasal administration of IS@NP/KH significantly attenuated the cognitive and behavioral deficits and reduced the Aβ deposition in the brain of an AD animal model (APPswe/PS 1d9 double-transgenic mice). Our results suggest that intranasal IS@NP/KH administration could be a novel therapeutic strategy for the treatment of AD.
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Affiliation(s)
- Xiancheng Zhang
- College of Life and Health Sciences, Northeastern University, Shenyang 110819, China
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Xiaoyu Zhang
- College of Life and Health Sciences, Northeastern University, Shenyang 110819, China
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - You Li
- College of Life and Health Sciences, Northeastern University, Shenyang 110819, China
| | - Manli Zhong
- College of Life and Health Sciences, Northeastern University, Shenyang 110819, China
| | - Pu Zhao
- College of Life and Health Sciences, Northeastern University, Shenyang 110819, China
| | - Chuang Guo
- College of Life and Health Sciences, Northeastern University, Shenyang 110819, China
| | - He Xu
- Department of Histology and Embryology, School of Medicine, Shenzhen University, Shenzhen 518060, China
| | - Tao Wang
- College of Life and Health Sciences, Northeastern University, Shenyang 110819, China
| | - Huiling Gao
- College of Life and Health Sciences, Northeastern University, Shenyang 110819, China
- Key Laboratory of Data Analytics and Optimization for Smart Industry, Northeastern University, Ministry of Education, Shenyang 110819, China
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8
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Humpel C. Intranasal Delivery of Collagen-Loaded Neprilysin Clears Beta-Amyloid Plaques in a Transgenic Alzheimer Mouse Model. Front Aging Neurosci 2021; 13:649646. [PMID: 33967739 PMCID: PMC8100061 DOI: 10.3389/fnagi.2021.649646] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 03/29/2021] [Indexed: 11/13/2022] Open
Abstract
Alzheimer’s disease (AD) is pathologically characterized by extracellular beta-amyloid (Aβ) plaques and intraneuronal tau tangles in the brain. A therapeutic strategy aims to prevent or clear these Aβ plaques and the Aβ-degrading enzyme neprilysin is a potent drug to degrade plaques. The major challenge is to deliver bioactive neprilysin into the brain via the blood-brain barrier. The aim of the present study is to explore if intranasal delivery of neprilysin can eliminate plaques in a transgenic AD mouse model (APP_SweDI). We will test if collagen or platelets are useful vehicles to deliver neprilysin into the brain. Using organotypic brain slices from adult transgenic APP_SweDI mice, we show that neprilysin alone or loaded in collagen hydrogels or in platelets cleared cortical plaques. Intransasal delivery of neprilysin alone increased small Aβ depositions in the middle and caudal cortex in transgenic mice. Platelets loaded with neprilysin cleared plaques in the frontal cortex after intranasal application. Intranasal delivery of collagen-loaded neprilysin was very potent to clear plaques especially in the middle and caudal parts of the cortex. Our data support that the Aβ degrading enzyme neprilysin delivered to the mouse brain can clear Aβ plaques and intranasal delivery (especially with collagen as a vehicle) is a fast and easy application. However, it must be considered that intranasal neprilysin may also activate more plaque production in the transgenic mouse brain as a side effect.
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Affiliation(s)
- Christian Humpel
- Laboratory of Psychiatry and Experimental Alzheimer's Research, Department of Psychiatry and Psychotherapy, Medical University of Innsbruck, Innsbruck, Austria
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9
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Rabiee N, Ahmadi S, Afshari R, Khalaji S, Rabiee M, Bagherzadeh M, Fatahi Y, Dinarvand R, Tahriri M, Tayebi L, Hamblin MR, Webster TJ. Polymeric Nanoparticles for Nasal Drug Delivery to the Brain: Relevance to Alzheimer's Disease. ADVANCED THERAPEUTICS 2020. [DOI: 10.1002/adtp.202000076] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Navid Rabiee
- Department of Chemistry Sharif University of Technology Tehran 11155‐3516 Iran
| | - Sepideh Ahmadi
- Student Research Committee Department of Medical Biotechnology School of Advanced Technologies in Medicine Shahid Beheshti University of Medical Sciences Tehran 19857‐17443 Iran
- Cellular and Molecular Biology Research Center Shahid Beheshti University of Medical Sciences Tehran 19857‐17443 Iran
| | - Ronak Afshari
- Department of Physics Sharif University of Technology P.O. Box 11155‐9161 Tehran Iran
| | - Samira Khalaji
- Biomaterial Group Department of Biomedical Engineering Amirkabir University of Technology Tehran 15875‐4413 Iran
| | - Mohammad Rabiee
- Biomaterial Group Department of Biomedical Engineering Amirkabir University of Technology Tehran 15875‐4413 Iran
| | - Mojtaba Bagherzadeh
- Department of Chemistry Sharif University of Technology Tehran 11155‐3516 Iran
| | - Yousef Fatahi
- Department of Pharmaceutical Nanotechnology Faculty of Pharmacy Tehran University of Medical Sciences Tehran 14155‐6451 Iran
- Nanotechnology Research Center Faculty of Pharmacy Tehran University of Medical Sciences Tehran 14155‐6451 Iran
- Universal Scientific Education and Research Network (USERN) Tehran 15875‐4413 Iran
| | - Rassoul Dinarvand
- Department of Pharmaceutical Nanotechnology Faculty of Pharmacy Tehran University of Medical Sciences Tehran 14155‐6451 Iran
- Nanotechnology Research Center Faculty of Pharmacy Tehran University of Medical Sciences Tehran 14155‐6451 Iran
| | - Mohammadreza Tahriri
- Department of Developmental Sciences Marquette University Milwaukee WI 53233 USA
| | - Lobat Tayebi
- Department of Developmental Sciences Marquette University Milwaukee WI 53233 USA
| | - Michael R. Hamblin
- Wellman Center for Photomedicine Massachusetts General Hospital Boston USA
- Department of Dermatology Harvard Medical School Boston USA
- Laser Research Centre Faculty of Health Science University of Johannesburg Doornfontein 2028 South Africa
| | - Thomas J. Webster
- Department of Chemical Engineering Northeastern University Boston MA 02115 USA
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10
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Seckler JM, Lewis SJ. Advances in D-Amino Acids in Neurological Research. Int J Mol Sci 2020; 21:ijms21197325. [PMID: 33023061 PMCID: PMC7582301 DOI: 10.3390/ijms21197325] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 09/29/2020] [Accepted: 09/29/2020] [Indexed: 12/16/2022] Open
Abstract
D-amino acids have been known to exist in the human brain for nearly 40 years, and they continue to be a field of active study to today. This review article aims to give a concise overview of the recent advances in D-amino acid research as they relate to the brain and neurological disorders. This work has largely been focused on modulation of the N-methyl-D-aspartate (NMDA) receptor and its relationship to Alzheimer’s disease and Schizophrenia, but there has been a wealth of novel research which has elucidated a novel role for several D-amino acids in altering brain chemistry in a neuroprotective manner. D-amino acids which have no currently known activity in the brain but which have active derivatives will also be reviewed.
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Affiliation(s)
- James M. Seckler
- Department Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
- Correspondence:
| | - Stephen J. Lewis
- Department Pediatrics, Case Western Reserve University, Cleveland, OH 44106, USA;
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11
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Chen Z, Lv Z, Sun Y, Chi Z, Qing G. Recent advancements in polyethyleneimine-based materials and their biomedical, biotechnology, and biomaterial applications. J Mater Chem B 2020; 8:2951-2973. [DOI: 10.1039/c9tb02271f] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Precise-synthesis strategies and integration approaches of bioinspired PEI-based systems, and their biomedical, biotechnology and biomaterial applications.
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Affiliation(s)
- Zhonghui Chen
- Guangdong Provincial Public Laboratory of Analysis and Testing Technology
- China National Analytical Center
- Guangzhou 510070
- China
- Guangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional Films
| | - Ziyu Lv
- Institute of Microscale Optoelectronics
- Shenzhen University
- Shenzhen 518000
- China
| | - Yifeng Sun
- Guangdong Provincial Public Laboratory of Analysis and Testing Technology
- China National Analytical Center
- Guangzhou 510070
- China
| | - Zhenguo Chi
- Guangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional Films
- State Key Laboratory of OEMT
- School of Chemistry
- Sun Yat-sen University
- Guangzhou 510275
| | - Guangyan Qing
- Key Laboratory of Separation Science for Analytical Chemistry
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116000
- China
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12
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Agrawal M, Saraf S, Saraf S, Antimisiaris SG, Chougule MB, Shoyele SA, Alexander A. Nose-to-brain drug delivery: An update on clinical challenges and progress towards approval of anti-Alzheimer drugs. J Control Release 2018; 281:139-177. [DOI: 10.1016/j.jconrel.2018.05.011] [Citation(s) in RCA: 203] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 05/10/2018] [Accepted: 05/10/2018] [Indexed: 01/02/2023]
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13
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Oviedo N, Manuel-Apolinar L, Orozco-Suárez S, Juárez-Cedillo T, Bekker Méndez VC, Tesoro-Cruz E. Intranasal Administration of a Naked Plasmid Reached Brain Cells and Expressed Green Fluorescent Protein, a Candidate for Future Gene Therapy Studies. Arch Med Res 2018; 48:616-622. [PMID: 29555303 DOI: 10.1016/j.arcmed.2018.03.003] [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: 09/29/2017] [Accepted: 03/01/2018] [Indexed: 11/26/2022]
Abstract
BACKGROUND Intranasal administration (Int adm) has been well-studied and offers the possibility to deliver larger molecular weight biologics, such as proteins, viral vectors, nanoparticles, and naked plasmids to the brain and treat a variety of diseases in the central nervous system. The predominant challenge in this field is finding efficient vectors that are capable of crossing the blood-brain barrier (BBB). OBJECTIVES Here, we investigated whether a naked plasmid (pIRES-hrGFP-1a), could cross the BBB, reach brain cells and express green fluorescent protein (GFP) after int-adm and propose it as candidate for future gene therapy studies. MATERIAL AND METHODS Thirty-six mice were divided into 2 groups. Eighteen animals were assigned to each cluster. Mice from experimental groups received 25 μg of pIRES-hrGFP-1a. The control groups received 25 μl of PBS. Plasmids were given intranasally by applying little drops in both nostrils. Twenty-four hours later, the mice were sacrificed, and their brains were removed. Later, PCR, RT-PCR, and immunohistochemical techniques were performed. RESULTS pIRES-hrGFP-1a crossed the BBB and was mainly detected in the olfactory nerves (20%) and hypothalamus (16%). In contrast, GFP/18S-expressing mRNAs were detected mostly in the olfactory bulbs (95%), frontal cortex (71%) and amygdala (60%). GFP was detected in the olfactory bulb, hippocampus, frontal cortex and brainstem at 24 h. CONCLUSIONS pIRES-hrGFP-1a could be considered a good candidate for gene therapy studies. In the future could be cloned some therapeutic genes in the pIRES-hrGFP-1a and could transcribe and translates deficient proteins that are required to restore a function.
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Affiliation(s)
- Norma Oviedo
- Unidad de Investigación Biomédica en Inmunología e Infectología, Hospital de Infectología, Centro Médico Nacional La Raza, Instituto Mexicano del Seguro Social, Ciudad de México, México
| | - Leticia Manuel-Apolinar
- Unidad de Investigación Médica en Enfermedades Endócrinas, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Ciudad de México, México
| | - Sandra Orozco-Suárez
- Unidad de Investigación Médica en Enfermedades Neurológicas, UMAE, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Ciudad de México, México
| | - Teresa Juárez-Cedillo
- Facultad de Estudios Superiores Zaragoza, Universidad Nacional Autónoma de México, Ciudad de México, México; Unidad de Investigación en Epidemiología Clínica, Instituto Mexicano del Seguro Social, Hospital General Regional No 1 Carlos Mcgregor Sánchez Navarro, Ciudad de México, México
| | - Vilma Carolina Bekker Méndez
- Unidad de Investigación Biomédica en Inmunología e Infectología, Hospital de Infectología, Centro Médico Nacional La Raza, Instituto Mexicano del Seguro Social, Ciudad de México, México.
| | - Emiliano Tesoro-Cruz
- Unidad de Investigación Biomédica en Inmunología e Infectología, Hospital de Infectología, Centro Médico Nacional La Raza, Instituto Mexicano del Seguro Social, Ciudad de México, México.
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14
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Cheng YS, Chen ZT, Liao TY, Lin C, Shen HCH, Wang YH, Chang CW, Liu RS, Chen RPY, Tu PH. An intranasally delivered peptide drug ameliorates cognitive decline in Alzheimer transgenic mice. EMBO Mol Med 2017; 9:703-715. [PMID: 28356312 PMCID: PMC5412883 DOI: 10.15252/emmm.201606666] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Alzheimer's disease (AD) is the most common neurodegenerative disease. Imbalance between the production and clearance of amyloid β (Aβ) peptides is considered to be the primary mechanism of AD pathogenesis. This amyloid hypothesis is supported by the recent success of the human anti‐amyloid antibody aducanumab, in clearing plaque and slowing clinical impairment in prodromal or mild patients in a phase Ib trial. Here, a peptide combining polyarginines (polyR) (for charge repulsion) and a segment derived from the core region of Aβ amyloid (for sequence recognition) was designed. The efficacy of the designed peptide, R8‐Aβ(25–35), on amyloid reduction and the improvement of cognitive functions were evaluated using APP/PS1 double transgenic mice. Daily intranasal administration of PEI‐conjugated R8‐Aβ(25–35) peptide significantly reduced Aβ amyloid accumulation and ameliorated the memory deficits of the transgenic mice. Intranasal administration is a feasible route for peptide delivery. The modular design combining polyR and aggregate‐forming segments produced a desirable therapeutic effect and could be easily adopted to design therapeutic peptides for other proteinaceous aggregate‐associated diseases.
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Affiliation(s)
- Yu-Sung Cheng
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Zih-Ten Chen
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Tai-Yan Liao
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Chen Lin
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Howard C-H Shen
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Ya-Han Wang
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | - Chi-Wei Chang
- Biomedical Imaging Research Center, Department of Nuclear Medicine, National Yang-Ming University and Taipei Veterans General Hospital, Taipei, Taiwan
| | - Ren-Shyan Liu
- Biomedical Imaging Research Center, Department of Nuclear Medicine, National Yang-Ming University and Taipei Veterans General Hospital, Taipei, Taiwan.,Molecular and Genetic Imaging Core, Taiwan Mouse Clinic, Academia Sinica, Taipei, Taiwan
| | - Rita P-Y Chen
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan .,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | - Pang-Hsien Tu
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
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Samaridou E, Alonso MJ. Nose-to-brain peptide delivery - The potential of nanotechnology. Bioorg Med Chem 2017; 26:2888-2905. [PMID: 29170026 DOI: 10.1016/j.bmc.2017.11.001] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 10/26/2017] [Accepted: 11/02/2017] [Indexed: 12/11/2022]
Abstract
Nose-to-brain (N-to-B) delivery offers to protein and peptide drugs the possibility to reach the brain in a non-invasive way. This article is a comprehensive review of the state-of-the-art of this emerging peptide delivery route, as well as of the challenges associated to it. Emphasis is given on the potential of nanosized drug delivery carriers to enhance the direct N-to-B transport of protein or peptide drugs. In particular, polymer- and lipid- based nanocarriers are comparatively analyzed in terms of the influence of their physicochemical characteristics and composition on their in vivo fate and efficacy. The use of biorecognitive ligands and permeation enhancers in order to enhance their brain targeting efficiency is also discussed. The article concludes highlighting the early stage of this research field and its still unveiled potential. The final message is that more explicatory PK/PD studies are required in order to achieve the translation from preclinical to the clinical development phase.
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Affiliation(s)
- Eleni Samaridou
- Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), Av. Barcelona s/n, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Maria José Alonso
- Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), Av. Barcelona s/n, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain; Department of Pharmacy and Pharmaceutical Technology, School of Pharmacy, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
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Wu Q, Sun JX, Song XH, Wang J, Xiong CQ, Teng FX, Gao CX. Blocking beta 2-adrenergic receptor inhibits dendrite ramification in a mouse model of Alzheimer's disease. Neural Regen Res 2017; 12:1499-1506. [PMID: 29089997 PMCID: PMC5649472 DOI: 10.4103/1673-5374.215261] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Dendrite ramification affects synaptic strength and plays a crucial role in memory. Previous studies revealed a correlation between beta 2-adrenergic receptor dysfunction and Alzheimer's disease (AD), although the mechanism involved is still poorly understood. The current study investigated the potential effect of the selective β2-adrenergic receptor antagonist, ICI 118551 (ICI), on Aβ deposits and AD-related cognitive impairment. Morris water maze test results demonstrated that the performance of AD-transgenic (TG) mice treated with ICI (AD-TG/ICI) was significantly poorer compared with NaCl-treated AD-TG mice (AD-TG/NaCl), suggesting that β2-adrenergic receptor blockage by ICI might reduce the learning and memory abilities of mice. Golgi staining and immunohistochemical staining revealed that blockage of the β2-adrenergic receptor by ICI treatment decreased the number of dendritic branches, and ICI treatment in AD-TG mice decreased the expression of hippocampal synaptophysin and synapsin 1. Western blot assay results showed that the blockage of β2-adrenergic receptor increased amyloid-β accumulation by downregulating hippocampal α-secretase activity and increasing the phosphorylation of amyloid precursor protein. These findings suggest that blocking the β2-adrenergic receptor inhibits dendrite ramification of hippocampal neurons in a mouse model of AD.
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Affiliation(s)
- Qin Wu
- Jiangsu Key Laboratory of Brain Disease Bioinformation, Xuzhou Medical College, Xuzhou, Jiangsu Province, China.,College of Medical Technology, Jiangsu Vocational College of Medicine, Yancheng, Jiangsu Province, China
| | - Jin-Xia Sun
- College of Medical Technology, Jiangsu Vocational College of Medicine, Yancheng, Jiangsu Province, China
| | - Xiang-He Song
- College of Medical Technology, Jiangsu Vocational College of Medicine, Yancheng, Jiangsu Province, China
| | - Jing Wang
- College of Medical Technology, Jiangsu Vocational College of Medicine, Yancheng, Jiangsu Province, China
| | - Cun-Quan Xiong
- College of Medical Technology, Jiangsu Vocational College of Medicine, Yancheng, Jiangsu Province, China
| | - Fei-Xiang Teng
- College of Medical Technology, Jiangsu Vocational College of Medicine, Yancheng, Jiangsu Province, China
| | - Cui-Xiang Gao
- College of Medical Technology, Jiangsu Vocational College of Medicine, Yancheng, Jiangsu Province, China
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