Article
Chemistry, Physical
Gufran Ahmed Siddiqui, Aabgeena Naeem
Summary: The study found that protein aggregation can lead to redox perturbation and cytotoxicity in cells, which is associated with various proteopathies including neurodegenerative disorders.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Spectroscopy
Seyyed Abolghasem Ghadami, Zahra Ahmadi, Zahra Moosavi-Nejad
Summary: By varying the temperature and pH, control of BSA-based nanoparticles/microparticles size could be achieved, thus controlling the rate of aggregation. The study provides more options for the size and shape control of BSA-based nanoparticles in natural buffer systems.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Review
Pharmacology & Pharmacy
Ancuta-Veronica Lupaescu, Monica Iavorschi, Mihai Covasa
Summary: Defective insulin signaling may increase the risk of developing Alzheimer's disease (AD) and affect neurodegeneration through amyloid formation and inflammatory responses. High blood sugar levels are associated with cognitive decline and oxidative stress in vulnerable tissues like the brain. Targeting amyloid fibrils and protein aggregation could potentially improve symptoms of both AD and type 2 diabetes mellitus.
Article
Biochemistry & Molecular Biology
Ajamaluddin Malik, Abdullah Alhomida, Javed Masood Khan
Summary: This study investigated the influence of a negatively charged benzene ring containing surfactant, sodium dodecylbenzene sulphonate (SDBS), on the fibrillation of bovine liver catalase (BLC). It was found that lower concentrations of SDBS promoted the native-like alpha-helical structure of BLC, while higher concentrations led to aggregation and the formation of amyloid-like structures. At pH 2.0, higher concentrations of SDBS enabled BLC to regain its native-like alpha-helical structure.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Biophysics
Ajamaluddin Malik, Abdulaziz M. Al-Amri, Abdullah Alhomida, Javed Masood Khan
Summary: The study investigated the effect of anionic surfactant SDS on the fibrillation of BLC under acidic conditions. Various methods were used to evaluate the conformational changes of BLC in response to SDS treatment. The results showed that low concentrations of SDS induced a transition from random coil to native-like structure, while high concentrations led to aggregation and formation of cross beta-sheeted structure in BLC.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Review
Chemistry, Multidisciplinary
Nicholas Andrikopoulos, Huayuan Tang, Yue Wang, Xiufang Liang, Yuhuan Li, Thomas P. Davis, Pu Chun Ke
Summary: Therapeutic peptides are important drugs that specifically target abnormal protein-protein interactions associated with amyloid diseases. The use of nanoparticles in combination with peptide drugs has emerged as a promising strategy for enhancing their efficacy against amyloid aggregation and cellular inflammation. However, there is still a lack of understanding of the chemistry and function of peptido-nanocomposites, and a systematic analysis of their application against a range of amyloid pathogeneses is missing.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Torsten John, Juliane Adler, Christian Elsner, Johannes Petzold, Martin Krueger, Lisandra L. Martin, Daniel Huster, Herre Jelger Risselada, Bernd Abel
Summary: The aggregation of peptides into amyloid fibrils is associated with ageing-related diseases. The size and curvature of nanoparticles can influence the kinetics of peptide aggregation, and different peptides may exhibit different responses to nanoparticles of different sizes. Experimental findings suggest that the surface binding affinity of nanoparticles and the physical properties of peptides play a role in peptide aggregation. Additional experiments support the size-dependent effects of nanoparticles on peptide aggregation and suggest a structural influence on the formed fibrils.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Arghadwip Paul, Suman Samantray, Marco Anteghini, Mohammed Khaled, Birgit Strodel
Summary: This study analyzed molecular dynamics simulations of Aβ peptide using different force fields to study its structure and dynamics, providing answers to important questions related to Aβ, such as suitable force fields for modeling, the actual appearance of Aβ peptide, and the time required for MD simulations to reach equilibrium. The analyses presented in this study will serve as a useful reference guide for understanding the behavior of Aβ peptide and other similar disordered proteins.
Article
Multidisciplinary Sciences
Kobe Janssen, Filip Claes, Dido Van de Velde, Vanessa L. Wehbi, Bert Houben, Yulia Lampi, Mieke Nys, Laleh Khodaparast, Ladan Khodaparast, Nikolaos Louros, Rob van der Kant, Joffre Verniers, Teresa Garcia, Meine Ramakers, Katerina Konstantoulea, Katerina Maragkou, Ramon Duran-Romana, Monica Musteanu, Mariano Barbacid, Bernard Scorneaux, Els Beirnaert, Joost Schymkowitz, Frederic Rousseau
Summary: Mutant KRAS is a challenging target for classical small molecule drugs, but this study shows that its misfolding can be induced by synthetic peptides derived from specific regions of the oncoprotein. These peptides were able to inhibit the function of mutant KRAS and showed antiproliferative activity against cancer cells. The findings provide proof-of-concept for exploiting the intrinsic misfolding propensity of KRAS as a therapeutic strategy.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Review
Neurosciences
Georg Meisl, Tuomas P. J. Knowles, David Klenerman
Summary: Advances in the understanding of protein aggregation in neurodegenerative diseases have been made, but the molecular mechanisms underlying aggregate proliferation in affected individuals are still poorly understood. In vitro studies have shed light on the assembly mechanisms of purified protein molecules, but applying these findings to disease-relevant systems presents challenges. Modifying experimental approaches and analysis techniques for in vivo studies is necessary to gain a better understanding of the mechanisms of protein aggregation.
FRONTIERS IN NEUROSCIENCE
(2022)
Article
Chemistry, Physical
Wenbo Zhang, Mingwei Liu, Lanlan Yu, Shanshan Mo, Zhun Deng, Shuli Liu, Yanlian Yang, Chen Wang, Chenxuan Wang
Summary: This study demonstrates the contribution of various noncovalent interactions to supramolecular assembly by investigating the self-assembly of peptides.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Review
Biochemistry & Molecular Biology
Syed Mohammad Zakariya, Aiman Zehra, Rizwan Hasan Khan
Summary: Misfolded and aggregated proteins are the main culprits behind neurodegenerative diseases, such as Alzheimer's, Parkinson's, and Huntington's diseases. This review summarizes the underlying mechanisms, detection technologies, and strategies to combat protein aggregation.
PROTEIN AND PEPTIDE LETTERS
(2022)
Article
Biochemistry & Molecular Biology
Yang Gao, Stefan Wennmalm, Bengt Winblad, Sophia Schedin-Weiss, Lars O. Tjernberg
Summary: Through FRET imaging, Aβ42 oligomerization was successfully detected in primary neurons, showing that Aβ42 oligomerized in lysosomes/late endosomes in a concentration-dependent manner. These findings contribute to a better understanding of Aβ42 oligomerization in neurons.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Biochemistry & Molecular Biology
Jofre Seira Curto, Maria Rosario Fernandez, Josep Cladera, Nuria Benseny-Cases, Natalia Sanchez de Groot
Summary: Homeostasis is crucial for cell function and disturbances in homeostasis can lead to health disorders. This study investigated how pH levels affect the aggregation of amyloid-beta-peptide (A beta) and the development of Alzheimer's disease. The results showed that the brain pH and different aggregated conformations play a role in the aggregation process. Furthermore, neutral pH and physiological salt concentrations were found to favor a slow aggregation with low cytotoxic effects.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Nanoscience & Nanotechnology
Devi Wahyuningtyas, Wen-Hao Chen, Ruei-Yu He, Yung-An Huang, Chia-Kang Tsao, Yu-Jung He, Chu-Yi Yu, Po-Chao Lu, Yu-Cai Chen, Sheng-Hann Wang, Ka Chon Ng, Bryan Po-Wen Chen, Pei-Kuen Wei, Jiun-Jie Shie, Chun-Hong Kuo, Y. Henry Sun, Joseph Jen-Tse Huang
Summary: The researchers designed and synthesized a polyglutamine-specific gold nanoparticle complex that targeted mHtt and alleviated its toxicity. The complex was able to disassociate fibrillary aggregates from polyQ peptides and reduce beta-sheet content in a concentration-dependent manner. Additionally, the complex was shown to penetrate cells, bind to cytosolic mHtt proteins, dissociate mHtt inclusions, reduce mHtt oligomers, and ameliorate mHtt-induced toxicity, suggesting potential therapeutic strategies against Huntington's disease.
ACS APPLIED MATERIALS & INTERFACES
(2021)