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. 2021 Feb;35(2):1048-1061.
doi: 10.1002/ptr.6871. Epub 2020 Sep 13.

N-butanol extract of Hedyotis diffusa protects transgenic Caenorhabditis elegans from Aβ-induced toxicity

Li DanQing  1 , Guo YuJie  1 , Zhang ChengPeng  1 , Du HongZhi  1 , Hong Yi  1 , Huang BiSheng  1 , Cao Yan  1
Affiliations

N-butanol extract of Hedyotis diffusa protects transgenic Caenorhabditis elegans from Aβ-induced toxicity

Li DanQing et al. Phytother Res. 2021 Feb.

Abstract

Hedyotis diffusa Willd (Rubiaceae) is a widely used and resourceful traditional Chinese medicine that exerts protection against aging and age-related diseases. However, the underlying mechanisms of the protective effects remain largely unclear. Alzheimer's disease (AD) is an age-related neurodegenerative disease, of which β-amyloid (Aβ)-induced toxicity has been suggested as a main cause. Herein, we use the transgenic Caenorhabditis elegans CL4176, CL2006, and CL2355 strains, which express human Aβ1-42 peptide, to investigate the effects and the possible mechanisms of n-butanol extract of H.diffusa (HDB)-mediated protection against Aβ toxicity in vivo. During the experiments, a method of quality control for HDB was established by HPLC. Additionally, we examined the effects of HBD on gene expression changes with qRT-PCR, aggregation of Aβ plagues with thioflavin-S staining, and protein detection with GFP labeling. HDB improved lifespan, locomotion, and stress resistance. Further study showed that HDB decreased paralysis, the accumulation of ROS, and AChE activity. Moreover, HDB suppressed neuronal Aβ-expression-induced defects in chemotaxis behavior and increased SOD activity. HDB also downregulated the Aβ mRNA level and decreased the number of Aβ deposits. Furthermore, HDB increased the expression levels of sod-3, daf-16, hsf-1, and hsp-16.2 gene and upregulated hsp-16.2::GFP and gst-4::GFP expression. Taken together, these results suggest that HDB may protect against Aβ-induced toxicity in C. elegans via the insulin/insulin-like growth factor-1 (IGF-1) signaling pathway.

Keywords: Alzheimer's disease; Caenorhabditis elegans; Hedyotis diffusa; amyloid beta-peptide 1-42; insulin/insulin-like growth factor-1 signaling pathway.

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References

REFERENCES

    1. Akhlaq, A. B., Pandey, S., Tiwari, S., & Pandey, R. (2016). Withanolide A offers neuroprotection, ameliorates stress resistance and prolongs the life expectancy of Caenorhabditis elegans. Experimental Gerontology, 78, 47-56.
    1. Alzheimer's Association. (2015). 2015 Alzheimer's disease facts and figures. Alzheimer's & Dementia, 11(3), 332-384.
    1. Anand, R., Gill, K. D., & Mahdi, A. A. (2014). Therapeutics of Alzheimer's disease: past，present and future. Neuropharmacology, 76(Part A), 27-50.
    1. Arya, U., Dwivedi, H., & Subramaniam, J. R. (2009). Reserpine ameliorates Aβ toxicity in the Alzheimer's disease model in Caenorhabditis elegans. Exp geronto, 44, 462-466.
    1. Fabian, T. J., & Johnson, T. E. (1994). Production of Age-Synchronous Mass Cultures of Caenorhabditis elegans. Journal of Gerontology, 49(4), B145-B156.

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