Article
Biochemistry & Molecular Biology
Edward Chau, Jin Ryoun Kim
Summary: This study investigated the interactions between Aβ42 and αS in different conformations. It was found that αS monomers and oligomers promoted the oligomerization and stabilization of soluble Aβ42, while αS fibrils hindered the aggregation of Aβ42. These interactions may be achieved through direct binding or co-assembly, and different parts of Aβ42 mediated the interactions with αS.
ARCHIVES OF BIOCHEMISTRY AND BIOPHYSICS
(2022)
Article
Biochemistry & Molecular Biology
Nan Yuan, Lianmeng Ye, Yan Sun, Hao Wu, Zhengpan Xiao, Wanmeng Fu, Zuqian Chen, Yechun Pei, Yi Min, Dayong Wang
Summary: The major pathological feature of Alzheimer's disease (AD) is the aggregation of amyloid beta peptide (A beta) in the brain. Inhibition of A beta(42) aggregation may prevent the advancement of AD. This study found that arginine dipeptide (RR) was the most effective at interfering with A beta(42) polymerization and reducing its toxicity, including cell death, reactive oxygen species (ROS) production, and apoptosis.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Multidisciplinary Sciences
Fanjie Meng, Janghyun Yoo, Hoi Sung Chung
Summary: In this study, a method combining single-molecule fluorescence lifetime imaging and deep learning was developed to monitor individual fibril formation in real time and analyze them in a high-throughput manner. This method allows for quantitative characterization of highly heterogeneous fibril formation and the discovery of a common nucleation mechanism.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Chemistry, Analytical
Guiyue Zheng, Shenglan Hu, Dongmiao Qin, Chunlian Nong, Lijuan Yang, Biyang Deng
Summary: This study presents an immunosensor for measuring A beta(42) levels using aggregation-induced enhanced electrochemiluminescence. The immunosensor utilizes metal-organic gels as substrates and demonstrates high sensitivity and stability.
ANALYTICA CHIMICA ACTA
(2023)
Article
Biochemistry & Molecular Biology
Abbas Salimi, Hao Li, Jin Yong Lee
Summary: The study indicates that the tautomeric effect of histidine and (epsilon delta delta) homodimers play a crucial role in the early stage of A beta aggregation, potentially leading to more beta-sheet formation.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Multidisciplinary Sciences
Dev Thacker, Mohammad Barghouth, Mara Bless, Enming Zhang, Sara Linse
Summary: Alzheimer's disease is a neurodegenerative condition associated with neuronal cell death caused by oligomers formed during the aggregation process of amyloid β-3 peptide 42 (Aβ42). Secondary nucleation, where new aggregates form from monomers on fibril surfaces, plays a major role in generating oligomers. Understanding the molecular mechanism of secondary nucleation is crucial for developing targeted therapies.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Chemistry, Multidisciplinary
Imad Abrao-Nemeir, Jeremy Bentin, Nathan Meyer, Jean-Marc Janot, Joan Torrent, Fabien Picaud, Sebastien Balme
Summary: Solid-state nanopores are a promising technology for high-throughput, label-free analysis of protein aggregation. In this study, we coated the surface of a silicon nitride nanopore with levodopamine to reduce nonspecific adsorption, and investigated its application in characterizing the aggregation of amyloid-beta and alpha-synuclein.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Review
Biochemistry & Molecular Biology
Anna Sulatskaya, Anastasiia O. Kosolapova, Alexander G. Bobylev, Mikhail Belousov, Kirill S. Antonets, Maksim Sulatsky, Irina M. Kuznetsova, Konstantin K. Turoverov, Olesya Stepanenko, Anton A. Nizhnikov
Summary: Both amyloids and beta-barrel proteins have beta-sheet-rich structures, with the latter being able to form functional amyloids in vivo. These beta-barrel amyloid proteins can interact with each other and form toxic oligomers, potentially contributing to the development of amyloidoses. Rapidly growing discoveries suggest that the number and diversity of functions of amyloid-forming beta-barrel proteins are significantly greater than currently understood.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Biotechnology & Applied Microbiology
Bing-Yu Wang, Bien-Chen Gu, Gou-Jen Wang, Yuan-Han Yang, Chia-Che Wu
Summary: This study demonstrates that a nanostructured gold electrode with deposited gold nanoparticles induced via electrochemical impedance spectroscopy (EIS) can be used as a conformation biosensor for the detection of Amyloid-beta(1-42) (A beta(1-42)) oligomers associated with Alzheimer's disease. The concentration of different A beta(1-42) conformations can be determined using EIS analysis with an equivalent circuit model. Probe antibodies (12F4) are used to identify the conformations of A beta(1-42) monomers and oligomers.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Hadi Nedaei, Nasrollah Rezaei-Ghaleh, Karin Giller, Stefan Becker, Leila Karami, Ali Akbar Moosavi-Movahedi, Christian Griesinger, Ali Akbar Saboury
Summary: Alzheimer's disease is characterized by the presence of extraneuronal amyloid plaques composed of amyloid-beta (A beta) fibrillar aggregates in the brains of patients. Previous research has shown that atorvastatin, a cholesterol-lowering drug, can decrease the production of cerebral A beta in mouse models. This study explores the direct effect of atorvastatin on A beta 42 aggregation and finds that it promotes aggregation, likely due to the presence of calcium ions. However, this effect can be reversed by removing calcium ions.
JOURNAL OF BIOLOGICAL CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Trung Hai Nguyen, Phuong H. Nguyen, Son Tung Ngo, Philippe Derreumaux
Summary: This study investigates the role of cholesterol in the formation of aggregates of the A beta peptide, which is associated with Alzheimer's disease. The researchers find that cholesterol acts as a glue to speed up the formation of larger aggregates, providing a mechanistic link between cholesterol and the disease.
Article
Multidisciplinary Sciences
Veronica Lattanzi, Ingemar Andre, Urs Gasser, Marija Dubackic, Ulf Olsson, Sara Linse
Summary: Amyloid fibrils, specifically A beta 42 fibrils, in neurodegenerative diseases like Alzheimer's, are toxic to neuronal cells. Small-angle scattering is used to study the dimension and shape of these fibrils, revealing an elliptical cross-section with a peptide arrangement of two filaments containing four monomers per plane. Additionally, fitting the data with a continuum model provides an atomistic model of the fibril structure.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Chemistry, Physical
William B. Weeks, Lauren E. Buchanan
Summary: This article presents a method to distinguish multiple β-sheet structures within peptide and protein aggregates, and demonstrates its effectiveness through experiments. The method utilizes two-dimensional infrared spectroscopy to calculate the transition dipole strength (TDS) spectrum, which provides higher sensitivity to protein structure and can detect structural details that are not observable by other techniques.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Jiai Hua, Xueman Wei, Yujian Bian, Xiang Ma, Li Hao, Jierui Sun, Jingjing Fan, Yulan Niu, Yanqing Wang
Summary: A novel sandwich-type phosphomolybdate incorporating a novel hexagonal calcium phosphorus oxygen cluster was synthesized and shown to modulate the misfolding conformation of A beta in Alzheimer's disease and suppress the production of reactive oxygen species.
Review
Biochemistry & Molecular Biology
Nicolas Papadopoulos, Nuria Suelves, Florian Perrin, Devkee M. Vadukul, Celine Vrancx, Stefan N. Constantinescu, Pascal Kienlen-Campard
Summary: Most neurodegenerative diseases are characterized by protein folding disorders, such as Alzheimer's disease. These diseases lead to the appearance of protein aggregates in vulnerable regions of the nervous system, which progressively spread through the neuronal network. Alzheimer's disease is characterized by neurofibrillary tangles composed of tau proteins and senile plaques composed of amyloid peptides. Understanding the structural determinants of the precursor protein APP and the formation of different A beta aggregates is crucial in deciphering the pathological conformational changes and mechanisms underlying amyloid fibril formation.
Article
Chemistry, Multidisciplinary
Rong Li, Xinyan Hou, Min Yuan, Yunfei Long, Shu Chen
Article
Environmental Sciences
Yintang Zhang, Yuanqiang Hao, Xiaohua Ma, Shu Chen, Maotian Xu
ENVIRONMENTAL POLLUTION
(2020)
Article
Polymer Science
Washat Ware, Tia Wright, Yimin Mao, Shubo Han, Jessa Guffie, Evgeny O. Danilov, Jeromy Rech, Wei You, Zhiping Luo, Bhoj Gautam
Summary: Research shows that tuning aggregation in polymer blends can optimize charge generation, which is beneficial for the design of highly efficient organic photovoltaic devices.
Article
Metallurgy & Metallurgical Engineering
Xin Su, Can-jun Liu, Yang Liu, Ya-hui Yang, Xuan Liu, Shu Chen
Summary: A versatile phase transformation strategy was proposed to synthesize novel BiVO4 nanosheets@WO3 nanorod and nanoplate arrays films. The prepared WO3/BiVa(4) heterojunction films exhibited excellent PEC activity in water splitting, with photocurrent densities reaching up to about 1.56 and 1.20 mA/cm(2) under visible light illumination without cocatalyst.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Chemistry, Physical
Kemryn Allen-Perry, Weston Straka, Danielle Keith, Shubo Han, Lewis Reynolds, Bhoj Gautam, Daniel E. Autrey
Summary: Two-dimensional materials based on transition metal carbides, such as MXenes, have unique properties and great potential in various applications. This study investigated the magnetic properties of Ti-based MXenes and found that the magnetic properties can be tuned by chemical etching conditions, which is beneficial for designing spintronic devices.
Article
Chemistry, Physical
Sivasankara Rao Ede, Candyce N. Collins, Carlos D. Posada, Gibin George, Hui Wu, William D. Ratcliff, Yulin Lin, Jianguo Wen, Shubo Han, Zhiping Luo
Summary: The synthesis of SrCo-Fe-O oxides to enhance OER activity resulted in the discovery of Sr2Co1.5Fe0.5O6-delta as the best catalyst, demonstrating superior performance in water oxidation due to its unique intermediate structure and increased covalency of Co 3d and O 2p. This study highlights the importance of developing catalysts with specific structural features and chemical properties for improved hydrogen generation efficiency.
Article
Chemistry, Analytical
Chenchen Li, Yi Zhuo, Xia Xiao, Shuangfu Li, Kai Han, Ming Lu, Jiaxin Zhang, Shu Chen, Hui Gu
Summary: A reliable method for in vivo measurements of chloride ion (Cl-) in the brain using an electrochemical microbiosensor (ECMB) was developed, with high specificity, accuracy, and reproducibility for real-time monitoring of Cl- in Parkinson's disease (PD) mouse brain. It showed promising availability and reliability compared to the standard Volhard's method.
ANALYTICAL CHEMISTRY
(2021)
Review
Chemistry, Analytical
Ting Li, Hui Dong, Yuanqiang Hao, Yintang Zhang, Shu Chen, Maotian Xu, Yanli Zhou
Summary: NIR light-driven PEC sensing is a promising analytical technique for in situ bioanalysis due to its deep penetration capability and minimal invasiveness. Recent developments in NIR PEC sensors focus on light-responsive materials and applications, with potential for significant future advancements.
Article
Chemistry, Analytical
Yuanqiang Hao, Yintang Zhang, Qiuling Sun, Shu Chen, Zilong Tang, Rongjin Zeng, Maotian Xu
Summary: Hypochlorous acid (HOCl) is a potent reactive oxygen species essential in biological processes. A new ratiometric fluorescent probe has been designed and synthesized for sensitive and selective detection of HOCl, with advantages including rapid response, high signal to noise ratio, and utility for visualizing HOCl in cells and organisms.
MICROCHEMICAL JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Canjun Liu, Linmei Chen, Xin Su, Shu Chen, Jie Zhang, Heping Yang, Yong Pei
Summary: Constructing a heterojunction interface in TiO2/BiVO4 photoanode significantly improves its PEC performance, with the in situ transformation method exhibiting better results than the soaking-calcining method. The faster electron transfer rate in the heterojunction interface and higher Fermi energy level on the BiVO4-202 surface contribute to the enhanced photocurrent density under visible light irradiation without a cocatalyst.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Analytical
Chong-Hua Zhang, Shenglan Wang, Peisheng Zhang, Shuaiwei Xu, Zhi-ling Song, Jian Chen, Shu Chen, Rongjin Zeng
Summary: The study developed a dual-targeting and tumor microenvironment responsive nanoassembly for imaging of HAase and PDT of tumor. The nanoassembly could be efficiently endocytosed into targeted tumor cells and activated both fluorescence signal and enhanced PDT effect by highly expressed HAase.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Ziyi Zhang, Mengyin Li, Yimei Zuo, Shu Chen, Yi Zhuo, Ming Lu, Guoyue Shi, Hui Gu
Summary: The study developed an electrochemical microsensor based on P-Mel films for ratiometric monitoring of pH in subacute PD mouse brains. The sensor showed high sensitivity and selectivity, making it suitable for in vivo determination of cerebral pH.
Article
Chemistry, Multidisciplinary
Ting Li, Yuanqiang Hao, Hui Dong, Chunlan Li, Jiaxiang Liu, Yintang Zhang, Zilong Tang, Rongjin Zeng, Maotian Xu, Shu Chen
Summary: This paper proposes a new strategy for PEC analysis by in situ generation of organic photosensitizers, achieving highly selective turn-on PEC response. The proposed strategy is expected to expand the paradigm of PEC sensing and holds potential for detecting various other analytes.
Article
Electrochemistry
Jin Ma, Wan Wu, Xi Xiao, Yaqian Feng, Yuanqiang Hao, Jie Zhang, Canjun Liu, Peisheng Zhang, Jian Chen, Rongjin Zeng, Shu Chen
Summary: In this study, electrodeposition of polymelamine (pMel) was achieved at relatively low onset potentials in a melamine aqueous solution containing trace bromide ion (Br). The addition of Br greatly promoted the polymerization reaction. Various techniques were used to investigate the effects of Br on the electropolymerization process, and a pMel film was successfully deposited on gold substrates.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Analytical
Shenglan Wang, Chong-Hua Zhang, Peisheng Zhang, Shu Chen, Zhi-ling Song, Jian Chen, Rongjin Zeng
Summary: A novel AIE-dot-based nanoprobe was proposed for hyaluronidase detection, exhibiting high sensitivity, excellent selectivity, and anti-interference capabilities. The nanoprobe offers a practicable turn-on strategy for specific fluorescence imaging of HAase in live tumor cells, showing promise for recognition and imaging of HAase in tumors in biological research.
ANALYTICAL METHODS
(2021)