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Qin W, Chen D, Wang Y, Liu Z, Zhou B, Bu X, Wen G. Targeting the hydrophobic region of pyroglutamate-modified amyloid-β by tyrocidine A prevents its nucleation-aggregation process and its "catalytic effect" on the Aβs aggregation. J Biochem Mol Toxicol 2024; 38:e23800. [PMID: 39132781 DOI: 10.1002/jbt.23800] [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: 02/26/2024] [Revised: 07/25/2024] [Accepted: 07/30/2024] [Indexed: 08/13/2024]
Abstract
Pyroglutamate (pE)-modified amyloid-β (Aβ) peptides play a crucial role in the development of Alzheimer's disease. pEAβ3-42 can rapidly form oligomers that gradually elongate hydrophobic segments to form β-sheet-rich amyloid intermediates, ultimately resulting in the formation of mature amyloid fibrils. pEAβ3-42 can also catalyze the aggregation of Aβ species and subsequently accelerate the formation of amyloid senile plaques. Considering the recent clinical success of the pEAβ3-42-targeting antibody donanemab, molecules that strongly bind pEAβ3-42 and prevent its aggregation and catalytic effect on Aβs may also provide potential therapeutic options for Alzheimer's disease. Here, we demonstrate that the natural antibiotic cyclopeptide tyrocidine A (TA) not only strongly inhibits the aggregation of Aβ1-42 as previously reported, but also interacts with the hydrophobic C-terminus and middle domain of pEAβ3-42 to maintain an unordered conformation, effectively impeding the formation of initial oligomers and subsequently halting the aggregation of pEAβ3-42. Furthermore, TA can disrupt the "catalytic effect" of pEAβ3-42 on amyloid aggregates, effectively suppressing Aβ aggregation and ultimately preventing the pathological events induced by Aβs.
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Affiliation(s)
- Wenjing Qin
- Medical Innovation Center, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, China
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Daoyuan Chen
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
- Faculty of bioengineering, Zhuhai Campus of Zunyi Medical University, Zhuhai, China
| | - Youqiao Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Ziyi Liu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Binhua Zhou
- School of Chinese Ethnic Medicine, Guizhou Minzu University, Guiyang, China
| | - Xianzhang Bu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Gesi Wen
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
- Department of Clinical Research, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, China
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2
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Mohammed AA, Barale SS, Kamble SA, Paymal SB, Sonawane KD. Molecular insights into the inhibition of early stage of Aβ peptide aggregation and destabilization of Alzheimer's Aβ protofibril by dipeptide D-Trp-Aib: A molecular modelling approach. Int J Biol Macromol 2023; 242:124880. [PMID: 37217059 DOI: 10.1016/j.ijbiomac.2023.124880] [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: 12/28/2022] [Revised: 05/10/2023] [Accepted: 05/11/2023] [Indexed: 05/24/2023]
Abstract
Amyloid beta (Aβ) peptide aggregates rapidly into the soluble oligomers, protofibrils and fibrils to form senile plaques, a neurotoxic component and pathological hallmark of Alzheimer's disease (AD). Experimentally, it has been demonstrated the inhibition of an early stages of Aβ aggregation by a dipeptide D-Trp-Aib inhibitor, but its molecular mechanism is still unclear. Hence, in the present study, we used molecular docking and molecular dynamics (MD) simulations to explore the molecular mechanism of inhibition of an early oligomerization and destabilization of preformed Aβ protofibril by D-Trp-Aib. Molecular docking study showed that the D-Trp-Aib binds at the aromatic (Phe19, Phe20) region of Aβ monomer, Aβ fibril and hydrophobic core of Aβ protofibril. MD simulations revealed the binding of D-Trp-Aib at the aggregation prone region (Lys16-Glu22) resulted in the stabilization of Aβ monomer by π-π stacking interactions between Tyr10 and indol ring of D-Trp-Aib, which decreases the β-sheet content and increases the α-helices. The interaction between Lys28 of Aβ monomer to D-Trp-Aib could be responsible to block the initial nucleation and may impede the fibril growth and elongation. The loss of hydrophobic contacts between two β-sheets of Aβ protofibril upon binding of D-Trp-Aib at the hydrophobic cavity resulted in the partial opening of β-sheets. This also disrupts a salt bridge (Asp23-Lys28) leading to the destabilization of Aβ protofibril. Binding energy calculations revealed that van der Waals and electrostatic interactions maximally favours the binding of D-Trp-Aib to Aβ monomer and Aβ protofibril respectively. The residues Tyr10, Phe19, Phe20, Ala21, Glu22, Lys28 of Aβ monomer, whereas Leu17, Val18, Phe19, Val40, Ala42 of protofibril contributing for the interactions with D-Trp-Aib. Thus, the present study provides structural insights into the inhibition of an early oligomerization of Aβ peptides and destabilization of Aβ protofibril, which could be useful to design novel inhibitors for the treatment of AD.
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Affiliation(s)
- Ali Abdulmawjood Mohammed
- Structural Bioinformatics Unit, Department of Biochemistry, Shivaji University, Kolhapur 416004, Maharashtra, (M.S.), India
| | - Sagar S Barale
- Department of Microbiology, Shivaji University, Kolhapur 416004, Maharashtra (MS), India
| | - Subodh Ashok Kamble
- Structural Bioinformatics Unit, Department of Biochemistry, Shivaji University, Kolhapur 416004, Maharashtra, (M.S.), India
| | - Sneha B Paymal
- Department of Microbiology, Shivaji University, Kolhapur 416004, Maharashtra (MS), India
| | - Kailas D Sonawane
- Structural Bioinformatics Unit, Department of Biochemistry, Shivaji University, Kolhapur 416004, Maharashtra, (M.S.), India; Department of Chemistry, Shivaji University, Kolhapur 416004, Maharashtra (M.S.), India.
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3
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Wang Y, Hu T, Wei J, Yin X, Gao Z, Li H. Inhibitory activities of flavonoids from Scutellaria baicalensis Georgi on amyloid aggregation related to type 2 diabetes and the possible structural requirements for polyphenol in inhibiting the nucleation phase of hIAPP aggregation. Int J Biol Macromol 2022; 215:531-540. [PMID: 35724902 DOI: 10.1016/j.ijbiomac.2022.06.107] [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: 04/30/2022] [Revised: 06/01/2022] [Accepted: 06/13/2022] [Indexed: 11/05/2022]
Abstract
Human islet amyloid polypeptide (hIAPP)-mediated cytotoxicity is identified as a potential target for developing new anti-diabetic molecules. Herein, we investigated the effect of the major bioactive compounds of Scutellaria baicalensis Georgi (S. baicalensis), including baicalein, baicalin, wogonin and oroxylin A, on hIAPP aggregation. We found that all of these compounds inhibited hIAPP fibril formation in a dose-dependent manner. But baicalein and baicalin, especially baicalein are more effective than wogonin and oroxylin A in stabilizing hIAPP monomers and eliminating toxic hIAPP assembly, suggesting that flavonoids with ortho-hydroxyl group on the A-ring exhibited higher anti-hIAPP nucleation potential than those without this structure. This stimulated our interest in further studying the possible structure-activity relationship between polyphenol and hIAPP aggregation inhibition. Our results demonstrated that flavonoids with ortho-hydroxyl group on the B-ring are also more effective against hIAPP nucleation than those without this structure. These results suggest that the ortho-hydroxybenzene structure is a key structural feature required for polyphenols to effectively inhibit hIAPP nucleation. This was further confirmed by the effect of polyphenoland phenols in inhibiting hIAPP nucleation. The conclusion that pyrogallol-type polyphenols are potential lead inhibitors may provide a valuable structural template for the further development of polyphenol-based inhibitor of amyloid peptides.
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Affiliation(s)
- Ying Wang
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, Wuhan 430074, PR China
| | - Ting Hu
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, Wuhan 430074, PR China
| | - Jingjing Wei
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, Wuhan 430074, PR China
| | - Xiaoying Yin
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, Wuhan 430074, PR China
| | - Zhonghong Gao
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, Wuhan 430074, PR China.
| | - Hailing Li
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, Wuhan 430074, PR China.
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4
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Zhang Q, Liu Y, Wu J, Zeng L, Wei J, Fu S, Ye H, Li H, Gao Z. Structure and mechanism behind the inhibitory effect of water soluble metalloporphyrins on Aβ1-42 aggregation. Inorg Chem Front 2022. [DOI: 10.1039/d1qi01434j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Although the exact molecular mechanism of the pathogenesis of Alzheimer’s disease (AD) is still unclear, compounds that can inhibit the aggregation of amyloid-β peptide (Aβ1-42) or scavenge the highly toxic...
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5
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Geng H, Gao D, Wang Z, Liu X, Cao Z, Xing C. Strategies for Inhibition and Disaggregation of Amyloid‐β Fibrillation. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100646] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Hao Geng
- School of Materials Science and Engineering Hebei University of Technology Tianjin 300130 China
| | - Dong Gao
- Key Laboratory of Hebei Province for Molecular, Biophysics Institute of Biophysics, School of Science Hebei University of Technology Tianjin 300130 China
| | - Zijuan Wang
- School of Materials Science and Engineering Hebei University of Technology Tianjin 300130 China
| | - Xiaoning Liu
- School of Materials Science and Engineering Hebei University of Technology Tianjin 300130 China
| | - Zhanshuo Cao
- College of Chemical Engineering Hebei University of Technology Tianjin 300130 China
| | - Chengfen Xing
- School of Materials Science and Engineering Hebei University of Technology Tianjin 300130 China
- Key Laboratory of Hebei Province for Molecular, Biophysics Institute of Biophysics, School of Science Hebei University of Technology Tianjin 300130 China
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Zhu J, Hu C, Zeng Z, Deng X, Zeng L, Xie S, Fang Y, Jin Y, Alezra V, Wan Y. Polymyxin B-inspired non-hemolytic tyrocidine A analogues with significantly enhanced activity against gram-negative bacteria: How cationicity impacts cell specificity and antibacterial mechanism. Eur J Med Chem 2021; 221:113488. [PMID: 33991963 DOI: 10.1016/j.ejmech.2021.113488] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 03/31/2021] [Accepted: 04/18/2021] [Indexed: 11/25/2022]
Abstract
Naturally occurring cyclic antimicrobial peptides (AMPs) such as tyrocidine A (Tyrc A) and gramicidin S (GS) are appealing targets for the development of novel antibiotics. However, their therapeutic potentials are limited by undesired hemolytic activity and relatively poor activity against Gram-negative bacteria. Inspired by polycationic lipopeptide polymyxin B (PMB), the so called 'last-resort' antibiotic for the treatment of infections caused by multidrug-resistant Gram-negative bacteria, we synthesized and biologically evaluated a series of polycationic analogues derived from Tyrc A. We were able to obtain peptide 8 that possesses 5 positive charges exhibiting potent activities against both Gram-negative and Gram-positive bacteria along with totally diminished hemolytic activity. Intriguingly, antibacterial mechanism studies revealed that, rather than the 'pore forming' model that possessed by Tyrc A, peptide 8 likely diffuses membrane in a 'detergent-like' manner. Furthermore, when treating mice with peritonitis-sepsis, peptide 8 showed excellent antibacterial and anti-inflammatory activities in vivo.
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Affiliation(s)
- Jibao Zhu
- National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, PR China
| | - Chengfei Hu
- National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, PR China
| | - Zizhen Zeng
- National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, PR China
| | - Xiaoyu Deng
- Minist Educ, Key Lab Modern Preparat TCM, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, PR China
| | - Lingbing Zeng
- Department of Clinical Laboratory, The First Affiliated Hospital of Nanchang University, 17 Yongwaizheng Street, Donghu, Nanchang, 330006, PR China
| | - Saisai Xie
- National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, PR China
| | - Yuanying Fang
- National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, PR China
| | - Yi Jin
- National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, PR China
| | - Valérie Alezra
- Laboratoire de Méthodologie, Synthèse et Molécules Thérapeutiques (ICMMO), UMR 8182, CNRS, Université Paris-Saclay, Bât 410, Facultédes Sciences D'Orsay, Orsay, 291405, France
| | - Yang Wan
- National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, PR China; Laboratoire de Méthodologie, Synthèse et Molécules Thérapeutiques (ICMMO), UMR 8182, CNRS, Université Paris-Saclay, Bât 410, Facultédes Sciences D'Orsay, Orsay, 291405, France; State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, 15 Yuchai Road, Guilin, 541004, PR China.
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7
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Xu J, Zheng T, Zhao C, Huang X, Du W. Resistance of nepetin and its analogs on the fibril formation of human islet amyloid polypeptide. Int J Biol Macromol 2020; 166:435-447. [PMID: 33127549 DOI: 10.1016/j.ijbiomac.2020.10.202] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 10/10/2020] [Accepted: 10/24/2020] [Indexed: 12/17/2022]
Abstract
The self-aggregation of human islet amyloid polypeptide (hIAPP) into toxic oligomers and fibrils is closely linked to the pathogenesis of type II diabetes mellitus. Inhibitors can resist hIAPP misfolding, and the resistance can be considered an alternative therapeutic strategy for this disease. Flavones have been applied in the field of diabetes research, however, the inhibition mechanism of many compounds on the fibril formation of related pathogenic peptides remains unclear. In this work, four flavones, namely, nepetin (1), genkwanin (2), luteolin (3), and apigenin (4), were used to impede the peptide aggregation of hIAPP and compared with that on Aβ protein, which is correlated with Alzheimer's disease. Results indicated that the four flavones effectively inhibited the aggregation of the two peptides and mostly dispersed the mature fibrils to monomers. The interactions of flavones with the two peptides demonstrated a spontaneous and exothermic reaction through predominant hydrophobic and hydrogen bonding interactions. The binding affinities of 1 and 3 were stronger than those of 2 and 4 possibly because of the difference in the substituent groups of these molecules. These flavones could also decrease membrane leakage and upregulate cell viability by reducing the formation of toxic oligomers. Moreover, the performance of these flavones in terms of binding affinity, cellular viability, and decreased oligomerization was better on hIAPP than on Aβ. This work offered valuable data about these flavones as prospective therapeutic agents against relevant diseases.
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Affiliation(s)
- Jufei Xu
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Ting Zheng
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Cong Zhao
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Xiangyi Huang
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Weihong Du
- Department of Chemistry, Renmin University of China, Beijing 100872, China.
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8
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Xu J, Zhao C, Huang X, Du W. Tetracycline derivatives resist the assembly behavior of human islet amyloid polypeptide. Biochimie 2020; 174:95-106. [DOI: 10.1016/j.biochi.2020.04.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 04/10/2020] [Accepted: 04/11/2020] [Indexed: 12/19/2022]
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9
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Geng H, Yuan H, Qiu L, Gao D, Cheng Y, Xing C. Inhibition and disaggregation of amyloid β protein fibrils through conjugated polymer–core thermoresponsive micelles. J Mater Chem B 2020; 8:10126-10135. [DOI: 10.1039/d0tb01863e] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The micelles (CPMs) have a thermoresponsive surface and reactive oxygen species (ROS) generating core. At 37 °C, CPMs captured Aβ aggregates to inhibit and disaggregate aggregates under white-light irradiation, reducing Aβ-induced cytotoxicity.
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Affiliation(s)
- Hao Geng
- School of Materials Science and Engineering
- Hebei University of Technology
- Tianjin 300401
- P. R. China
| | - Hongbo Yuan
- Key Laboratory of Hebei Province for Molecular Biophysics
- Institute of Biophysics
- School of Science
- Hebei University of Technology
- Tianjin 300401
| | - Liang Qiu
- Key Laboratory of Hebei Province for Molecular Biophysics
- Institute of Biophysics
- School of Science
- Hebei University of Technology
- Tianjin 300401
| | - Dong Gao
- Key Laboratory of Hebei Province for Molecular Biophysics
- Institute of Biophysics
- School of Science
- Hebei University of Technology
- Tianjin 300401
| | - Yongqiang Cheng
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis
- Ministry of Education
- Key Laboratory of Analytical Science and Technology of Hebei Province
- College of Chemistry and Environmental Science
- Hebei University
| | - Chengfen Xing
- School of Materials Science and Engineering
- Hebei University of Technology
- Tianjin 300401
- P. R. China
- Key Laboratory of Hebei Province for Molecular Biophysics
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10
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Yang T, Zhu Z, Yin E, Wang Y, Zhang C, Yuan H, Zhang H, Jin S, Guo Z, Wang X. Alleviation of symptoms of Alzheimer's disease by diminishing Aβ neurotoxicity and neuroinflammation. Chem Sci 2019; 10:10149-10158. [PMID: 32055369 PMCID: PMC6979322 DOI: 10.1039/c9sc03042e] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 09/16/2019] [Indexed: 01/22/2023] Open
Abstract
Alzheimer's disease (AD) is one of the most prevailing neurodegenerative illnesses in the elderly. Accumulation of amyloid-β peptide (Aβ) and inflammation play critical roles in the pathogenesis and development of AD. Multi-target drugs may interdict the progress of AD through a synergistic mechanism. A neuromodulator, 2-((1H-benzo[d]imidazole-2-yl)methoxy)benzoic acid (BIBA), consisting of an Aβ-targeting group and a derivative of anti-inflammatory aspirin was designed as a potential anti-AD agent. BIBA exhibits a remarkable inhibitory effect on the self- and metal-induced Aβ aggregations and shows outstanding anti-inflammatory activity simultaneously. The neurotoxicity of Aβ aggregates is attenuated, and the production of pro-inflammatory cytokines (PICs), such as IL-6, IL-1β and TNF-α, in microglia stimulated by lipopolysaccharide (LPS) or Aβ is reduced. Owing to the synergy between the inhibition of Aβ oligomerization and downregulation of PICs, BIBA markedly prolongs the lifespan and relieves the Aβ-induced paralysis of Aβ-transgenic Caenorhabditis elegans, thus showing the potential to ameliorate the symptoms of AD through inhibiting Aβ neurotoxicity and deactivating microglia. These findings demonstrate that both Aβ aggregation and neuroinflammation are therapeutic targets for anti-AD drugs, and dual-functional agents that integrate anti-Aβ and anti-inflammatory capabilities have great advantages over the traditional single-target agents for AD treatment.
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Affiliation(s)
- Tao Yang
- State Key Laboratory of Pharmaceutical Biotechnology , School of Life Sciences , Nanjing University , Nanjing 210023 , P. R. China .
| | - Zhenzhu Zhu
- State Key Laboratory of Pharmaceutical Biotechnology , School of Life Sciences , Nanjing University , Nanjing 210023 , P. R. China .
| | - Enmao Yin
- State Key Laboratory of Pharmaceutical Biotechnology , School of Life Sciences , Nanjing University , Nanjing 210023 , P. R. China .
| | - Yanqing Wang
- School of Chemistry and Chemical Engineering , Yancheng Teachers University , Yancheng 224002 , P. R. China
| | - Changli Zhang
- Department of Chemistry , Nanjing Xiaozhuang College , Nanjing , 210017 , P. R. China
| | - Hao Yuan
- State Key Laboratory of Coordination Chemistry , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , P. R. China
| | - Hongmei Zhang
- State Key Laboratory of Pharmaceutical Biotechnology , School of Life Sciences , Nanjing University , Nanjing 210023 , P. R. China .
| | - Suxing Jin
- State Key Laboratory of Pharmaceutical Biotechnology , School of Life Sciences , Nanjing University , Nanjing 210023 , P. R. China .
| | - Zijian Guo
- State Key Laboratory of Coordination Chemistry , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , P. R. China
| | - Xiaoyong Wang
- State Key Laboratory of Pharmaceutical Biotechnology , School of Life Sciences , Nanjing University , Nanjing 210023 , P. R. China .
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Xu J, Zhao C, Huang X, Du W. Regulation of Artemisinin and Its Derivatives on the Assembly Behavior and Cytotoxicity of Amyloid Polypeptides hIAPP and Aβ. ACS Chem Neurosci 2019; 10:4522-4534. [PMID: 31577904 DOI: 10.1021/acschemneuro.9b00385] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The misfolding and aggregation of human islet amyloid polypeptide (hIAPP) and amyloid-β (Aβ) protein are closely associated with type 2 diabetes mellitus (T2DM) and Alzheimer's disease, respectively. Inhibitors of amyloid peptides include short peptides, aromatic organic molecules, nanoparticles, and even metal compounds. Sesquiterpenoid artemisinins are widely used in anti-malaria treatments, and they may modulate glucose homeostasis against diabetes. However, the antidiabetic mechanism of these compounds remains unclear. In this work, four compounds, namely, artemisinin (1), dihydroartemisinin (2), artesunate (3), and artemether (4), were exploited to inhibit the assembly behavior of hIAPP and compared with that of Aβ. Although structurally distinct from other aromatic inhibitors of amyloid peptides, these sesquiterpenoids effectively altered the two peptides' fibril morphologies and disaggregated the mature fibrils mostly to the monomers. The interaction of artemisinins with the two peptides demonstrated a spontaneous, exothermic, and entropy-driven binding process predominantly through hydrophobic and hydrogen bonding interactions. Moreover, they reversed cytotoxicity and membrane leakage by reducing peptides' oligomerization. The results suggested that these compounds had better inhibition and disaggregation capability against hIAPP than against Aβ. Furthermore, the effects of these compounds' structural modification on the amyloid fibril formation of the two peptides were observed. The molecular screening offered a new perspective for artemisinins as promising inhibitors against amyloidosis related diseases.
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Affiliation(s)
- Jufei Xu
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Cong Zhao
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Xiangyi Huang
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Weihong Du
- Department of Chemistry, Renmin University of China, Beijing 100872, China
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12
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Wang Z, Dong X, Sun Y. Mixed Carboxyl and Hydrophobic Dendrimer Surface Inhibits Amyloid-β Fibrillation: New Insight from the Generation Number Effect. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:14681-14687. [PMID: 31635460 DOI: 10.1021/acs.langmuir.9b02527] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Fibrillation of amyloid-β peptide (Aβ) is closely associated with the progression of Alzheimer's disease (AD), and so inhibition of Aβ fibrillation has been considered as one of the promising strategies for AD prevention and treatment. Our group has proposed the hydrophobic binding-electrostatic repulsion (HyBER) theory on inhibiting Aβ fibrillation by a surface with mixed negative charges and hydrophobic groups, which provides a new strategy for the design of potent amyloid inhibitors. Carboxyl-terminated polyamidoamine dendrimer (PAMAM) is a kind of biocompatible nanomaterial with only carboxyl groups on its surface, and its architecture and property vary with the generation number, low-generation dendrimers possessing sparse distributions of terminal groups while high-generation dendrimers having compact surface groups, which offer abundant base materials for further study of the HyBER theory. We have designed a potent amyloid inhibitor with generation 5 PAMAM. To provide new insights into the HyBER mechanism, we have herein proposed to synthesize phenyl-modified PAMAM dendrimers of generations 3 to 6 (G3-P to G6-P) and study the effect of the generation number on Aβ fibrillation. Results show that phenyl derivatives of low-generation dendrimers (G3-P and G4-P) do not show any interference with Aβ aggregation, whereas the phenyl derivatives of high-generation dendrimers (G5-P and G6-P) significantly inhibit Aβ42 aggregation and alter the ultrastructure of Aβ42 aggregates. The results indicate that the density and distribution of surface functional groups on a dendrimer is of great importance for the HyBER effect to happen. The new understanding on the HyBER mechanism would benefit in the development of potent amyloid inhibitors based on the theory.
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Affiliation(s)
- Ziyuan Wang
- Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology , Tianjin University , Tianjin 300354 , China
| | - Xiaoyan Dong
- Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology , Tianjin University , Tianjin 300354 , China
| | - Yan Sun
- Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology , Tianjin University , Tianjin 300354 , China
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13
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Liu Z, Wang Y, Qin W, Chen D, Feng Y, Su H, Shao W, Zhou B, Bu X. Raloxifene alleviates amyloid-β-induced cytotoxicity in HT22 neuronal cells via inhibiting oligomeric and fibrillar species formation. J Biochem Mol Toxicol 2019; 33:e22395. [PMID: 31583774 DOI: 10.1002/jbt.22395] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 07/01/2019] [Accepted: 09/12/2019] [Indexed: 12/22/2022]
Abstract
Raloxifene, a selective estrogen receptor modulator, displays benefits for Alzheimer's disease (AD) prevention in postmenopausal women as hormonal changes during menopause have the potential to influence AD pathogenesis, but the underlying mechanism of its neuroprotection is not entirely clear. In this study, the effects of raloxifene on amyloid-β (Aβ) amyloidogenesis were evaluated. The results demonstrated that raloxifene inhibits Aβ42 aggregation and destabilizes preformed Aβ42 fibrils through directly interacting with the N-terminus and middle domains of Aβ42 peptides. Consequently, raloxifene not only reduces direct toxicity of Aβ42 in HT22 neuronal cells, but also suppresses expressions of tumor necrosis factor-α and transforming growth factor-β induced by Aβ42 peptides, and then alleviates microglia-mediated indirect toxicity of Aβ42 to HT22 neuronal cells. Our results suggested an alternative possible explanation for the neuroprotective activity of raloxifene in AD prevention.
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Affiliation(s)
- Ziyi Liu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Youqiao Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Wenjing Qin
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Daoyuan Chen
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Yanqiao Feng
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Hui Su
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Weiyan Shao
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Binhua Zhou
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Xianzhang Bu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
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14
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Chen D, Qin W, Wen G, Shi B, Liu Z, Wang Y, Zhou Q, Quan J, Zhou B, Bu X. Dissociation of haemolytic and oligomer-preventing activities of gramicidin S derivatives targeting the amyloid-β N-terminus. Chem Commun (Camb) 2018; 53:13340-13343. [PMID: 29188836 DOI: 10.1039/c7cc08180d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The intrinsic haemolysis of an amyloid-β (Aβ) N-terminal targeting gramicidin S derivative was successfully dissociated from its Aβ oligomer-preventing activities via Ala-scanning-based regulation of molecular amphiphilicity. The representative analogue DGR-7 shows low toxicity but significant efficiency in preventing Aβ oligomers and reducing amyloid plaques in APP/PS1 transgenic AD mice.
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Affiliation(s)
- Daoyuan Chen
- School of Pharmaceutical Sciences, Sun Yat-sen University, GuangZhou 510006, China.
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15
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16
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Ke PC, Sani MA, Ding F, Kakinen A, Javed I, Separovic F, Davis TP, Mezzenga R. Implications of peptide assemblies in amyloid diseases. Chem Soc Rev 2017; 46:6492-6531. [PMID: 28702523 PMCID: PMC5902192 DOI: 10.1039/c7cs00372b] [Citation(s) in RCA: 239] [Impact Index Per Article: 34.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Neurodegenerative disorders and type 2 diabetes are global epidemics compromising the quality of life of millions worldwide, with profound social and economic implications. Despite the significant differences in pathology - much of which are poorly understood - these diseases are commonly characterized by the presence of cross-β amyloid fibrils as well as the loss of neuronal or pancreatic β-cells. In this review, we document research progress on the molecular and mesoscopic self-assembly of amyloid-beta, alpha synuclein, human islet amyloid polypeptide and prions, the peptides and proteins associated with Alzheimer's, Parkinson's, type 2 diabetes and prion diseases. In addition, we discuss the toxicities of these amyloid proteins based on their self-assembly as well as their interactions with membranes, metal ions, small molecules and engineered nanoparticles. Through this presentation we show the remarkable similarities and differences in the structural transitions of the amyloid proteins through primary and secondary nucleation, the common evolution from disordered monomers to alpha-helices and then to β-sheets when the proteins encounter the cell membrane, and, the consensus (with a few exceptions) that off-pathway oligomers, rather than amyloid fibrils, are the toxic species regardless of the pathogenic protein sequence or physicochemical properties. In addition, we highlight the crucial role of molecular self-assembly in eliciting the biological and pathological consequences of the amyloid proteins within the context of their cellular environments and their spreading between cells and organs. Exploiting such structure-function-toxicity relationship may prove pivotal for the detection and mitigation of amyloid diseases.
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Affiliation(s)
- Pu Chun Ke
- ARC Center of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
| | - Marc-Antonie Sani
- School of Chemistry, Bio21 Institute, The University of Melbourne, 30 Flemington Rd, Parkville, VIC 3010, Australia
| | - Feng Ding
- Department of Physics and Astronomy, Clemson University, Clemson, SC 29634, United States
| | - Aleksandr Kakinen
- ARC Center of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
| | - Ibrahim Javed
- ARC Center of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
| | - Frances Separovic
- School of Chemistry, Bio21 Institute, The University of Melbourne, 30 Flemington Rd, Parkville, VIC 3010, Australia
| | - Thomas P. Davis
- ARC Center of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
- Department of Chemistry, University of Warwick, Gibbet Hill, Coventry, CV4 7AL, United Kingdom
| | - Raffaele Mezzenga
- ETH Zurich, Department of Health Science & Technology, Schmelzbergstrasse 9, LFO, E23, 8092 Zurich, Switzerland
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17
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EGCG inhibits the oligomerization of amyloid beta (16-22) hexamer: Theoretical studies. J Mol Graph Model 2017; 76:1-10. [PMID: 28658644 DOI: 10.1016/j.jmgm.2017.06.018] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Revised: 06/16/2017] [Accepted: 06/19/2017] [Indexed: 11/21/2022]
Abstract
An extensive replica exchange molecular dynamics (REMD) simulation was performed to investigate the progress patterns of the inhibition of (-)-epigallocatechin-3-gallate (EGCG) on the Aβ16-22 hexamer. Structural variations of the oligomers without and with EGCG were monitored and analyzed in detail. It has been found that EGCG prevents the formation of Aβ oligomer through two different ways by either accelerating the Aβ oligomerization or reducing the β-content of the hexamer. It also decreases the potential "highly toxic" conformations of Aβ oligomer, which is related to the conformations having high order β-sheet sizes. Both electrostatic and van der Waals interaction energies are found to be involved to the binding process. Computed results using quantum chemical methods show that the π-π stacking is a critical factor of the interaction between EGCG and the peptides. As a result, the binding free energy of the EGCG to the Aβ peptides is slightly larger than that of the curcumin.
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18
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Wen G, Chen D, Qin W, Zhou B, Wang Y, Liu Z, Du J, Zhou Q, Quan J, Bu X. Stabilizing amyloid-β peptide by the N-terminus capture is capable of preventing and eliminating amyloid-β oligomers. Chem Commun (Camb) 2017. [DOI: 10.1039/c7cc03102e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel strategy to prevent and eliminate amyloid-β (Aβ) oligomers from either the early aggregation or the fibril dissolution pathway is described.
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Affiliation(s)
- Gesi Wen
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- GuangZhou 510006
- China
| | - Daoyuan Chen
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- GuangZhou 510006
- China
| | - Wenjing Qin
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- GuangZhou 510006
- China
| | - Binhua Zhou
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- GuangZhou 510006
- China
| | - Youqiao Wang
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- GuangZhou 510006
- China
| | - Ziyi Liu
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- GuangZhou 510006
- China
| | - Jun Du
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- GuangZhou 510006
- China
| | - Qiang Zhou
- Laboratory of Chemical Genomics
- School of Chemical Biology and Biotechnology
- Peking University Shenzhen Graduate School
- Shenzhen 518055
- China
| | - Junmin Quan
- Laboratory of Chemical Genomics
- School of Chemical Biology and Biotechnology
- Peking University Shenzhen Graduate School
- Shenzhen 518055
- China
| | - Xianzhang Bu
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- GuangZhou 510006
- China
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