@ARTICLE{10.3389/fneur.2019.01312, AUTHOR={Fan, Liyuan and Mao, Chengyuan and Hu, Xinchao and Zhang, Shuo and Yang, Zhihua and Hu, Zhengwei and Sun, Huifang and Fan, Yu and Dong, Yali and Yang, Jing and Shi, Changhe and Xu, Yuming}, TITLE={New Insights Into the Pathogenesis of Alzheimer's Disease}, JOURNAL={Frontiers in Neurology}, VOLUME={10}, YEAR={2020}, URL={https://www.frontiersin.org/articles/10.3389/fneur.2019.01312}, DOI={10.3389/fneur.2019.01312}, ISSN={1664-2295}, ABSTRACT={Alzheimer's disease (AD), a common neurodegenerative disease in the elderly and the most prevalent cause of dementia, is characterized by progressive cognitive impairment. The prevalence of AD continues to increase worldwide, becoming a great healthcare challenge of the twenty-first century. In the more than 110 years since AD was discovered, many related pathogenic mechanisms have been proposed, and the most recognized hypotheses are the amyloid and tau hypotheses. However, almost all clinical trials targeting these mechanisms have not identified any effective methods to treat AD. Scientists are gradually moving away from the simple assumption, as proposed in the original amyloid hypothesis, to new theories of pathogenesis, including gamma oscillations, prion transmission, cerebral vasoconstriction, growth hormone secretagogue receptor 1α (GHSR1α)-mediated mechanism, and infection. To place these findings in context, we first reviewed the neuropathology of AD and further discussed new insights in the pathogenesis of AD.} }