Journal
MEDICINAL CHEMISTRY RESEARCH
Volume 32, Issue 4, Pages 601-616Publisher
SPRINGER BIRKHAUSER
DOI: 10.1007/s00044-023-03026-w
Keywords
Alzheimer's disease; Amyloid- protein; Neurodegenerative diseases; PROTACs; Ubiquitin-Proteosome- System; Tau degradation
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Proteolysis-targeting technology is a new technique that targets mutated, denatured, and misfolded proteins. Accumulation of these harmful proteins in the brain is a cause of neurodegenerative diseases such as Alzheimer's disease. Developing small molecule inhibitors to target these proteins is challenging due to their undruggable nature. However, the body's protein quality control systems can remove these aggregates. Medicinal chemistry advancements have led to the development of chemical mediated targeted protein degradation techniques, such as PROTACs, which degrade misfolded proteins through the ubiquitin-proteasome system. This article provides an update on the design and advantages/disadvantages of PROTACs as therapeutic modalities for Alzheimer's disease.
Proteolysis-targeting technology is a new emerging technique to target mutated, denatured, and misfolded proteins that accumulate in various parts of the body. The accumulation of these aggregated harmful proteins, such as beta-amyloid (A beta), tau, mHTT, polyglutamates, and other proteins in the brain, are some of the reasons for the development of neurodegenerative diseases. A beta accumulation and hyperphosphorylation are the common signals for the progression of Alzheimer's disease (AD). Developing conventional small molecule inhibitors to target these accumulating proteins is a difficult task due to the undruggable/indestructible nature of certain protein molecules. However, the removal of these aggregates as a defense mechanism by different protein quality control systems in our body is a normal physiological process. Advancements in the field of medicinal chemistry has led to the development of various chemical mediated targeted protein degradation techniques, which target disease causing protein of interest (POI) through ubiquitin-proteasome system (UPS) to dissolve/degrade the misfolded proteins. Such methods involve the development of molecular glues, proteolysis targeting chimeras (PROTACs), autophagosome conjugated compounds, and hydrophobic tagging. This article covers a recent update on designing of PROTACs using different linkers, their mechanism of action, pharmacokinetics, in addition to advantages and disadvantages of PROTACs as therapeutic modalities to treat AD.
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