Cited by 45Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

Geniposide Attenuates Insulin-Deficiency-Induced Acceleration of β-amyloidosis in an APP/PS1 Transgenic Model of Alzheimer's Disease

Zhang, Yonglan, Yin, Fei, Liu, Jianhui, Liu, Zixuan, Guo, Lixia, Xia, Zhining, Zidichouski, Jeffrey·2015·Neurochemistry International

Abstract

Our previous studies have shown that geniposide plays an essential role in glucose-stimulated insulin secretion from pancreatic β cells and also antagonizesAβ1-42-induced cytotoxicity examined using a primary cortical neuron assay. However, the mechanism by which geniposide appears to regulate insulin signaling in the brain is presently not well understood. In this study, we administered streptozotocin (STZ) to induce insulin-deficiency in an AD transgenic mouse model, and investigated the effects of geniposide on the β-amyloidogenic processing of amyloid precursor protein (APP) using in vitro and in vivo models. Our results indicate that treatment with STZ (90 mg/kg, i.p., once daily for two consecutive days) induced significant reduction in peripheral and brain insulin levels in both wild-type and APP/PS1 transgenic mice. Administration of geniposide for 4 weeks significantly decreased the concentrations of cerebral β-amyloid peptides (Aβ1-40 and Aβ1-42) in STZ-treated AD mice. Further experiments showed that geniposide up-regulated the protein levels of β-site APP cleaving enzyme (BACE1) and insulin-degrading enzyme (IDE), and decreased the protein levels of ADAM10 when examined using a primary cultured cortical neuron assay and in STZ-induced AD mice. Meanwhile, geniposide also directly enhanced the effects of insulin by reducing Aβ1-42 levels in primary cultured cortical neurons. Taken together, our findings provide a mechanistic link between diabetes and AD, and is consistent with the notion that geniposide might play an important role on APP processing via enhancing insulin signaling and may convey a therapeutic benefit in AD.

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Crossref · 10.1016/j.neuint.2015.04.002

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Authors
Zhang, Y., Yin, F., Liu, J., Liu, Z., Guo, L., Xia, Z., & Zidichouski, J.
Affiliations
  • Chongqing University (CN)
  • Chongqing Technology and Business University (CN)
  • University of Calgary (CA)
Corresponding author
Yin, Fei
Venue
Neurochemistry International
Publisher
Elsevier BV
Published
2015-10
Volume
89
Pages
7-16
ISSN
0197-0186 (ISSN-L)
OpenAlex
W2052363595
Cited by
45
References
48
Citations by year
2025: 2 · 2024: 1 · 2023: 7 · 2022: 4 · 2021: 6 · 2019: 4 · 2018: 5 · 2017: 5 · 2016: 9 · 2015: 2
FWCI
5.16
Type
journal article
Language
en
Open access
closed
Locations
  • Neurochemistry International (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Natural Science Foundation of China (81173063)
  • Chongqing Science Found for Distinguished Young Scholars (CSTC2014jcyjjq10003)
  • The Innovation of Science and Technology Leading Talent in Chongqing (CSTC2014kjcxljrc0009)
  • Chongqing Natural Science Foundation (2013jjb10032)
  • Innovative Research Team Development Program (201314)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
geniposide, Alzheimer's disease, beta-amyloidosis, APP/PS1 mice, APP processing, BACE1, insulin-degrading enzyme, ADAM10, insulin signaling, amyloid-beta 42, cortical neurons
MeSH terms
Alzheimer Disease, Animals, Brain, Cells, Cultured, Diabetes Mellitus, Experimental, Disease Models, Animal, Humans, Insulin, Male, Mice, Inbred C57BL, Mice, Transgenic, Peptide Fragments, Amyloid beta-Peptides, Amyloid beta-Protein Precursor, Iridoids, Mice, Presenilin-1

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