Effects of Curcumin on Axon Growth and Myelin Sheath Formation in an In Vitro Model

Yang, Lei; Ren, Zheng-Ju; Song, Pan; Liu, Zhenghuan; Peng, Zhou; Zhou, Jing; Dong, Qiang

doi:10.1007/s11064-023-03946-4

Cited by 4 publications

(1 citation statement)

References 38 publications

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“…Using different cell type-specific knockout TSC mouse models, several groups showed that inhibiting mTORC1 using rapamycin has successfully rescued neuronal, oligodendroglial, astroglial, and microglial defects in the TSC rodent models [ 7 , 85 – 87 ]. Moreover, past research has revealed that curcumin is able to increase MBP expression, promoting myelin sheath formation and establishing remyelination in peripheral nerves and corpus callosum in the central nervous system [ 88 , 89 ].…”

Section: Discussionmentioning

confidence: 99%

Amelioration of the brain structural connectivity is accompanied with changes of gut microbiota in a tuberous sclerosis complex mouse model

Hsieh,

Lo,

Wang

et al. 2024

Transl Psychiatry

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Tuberous sclerosis complex (TSC) is a genetic disease that causes benign tumors and dysfunctions in many organs, including the brain. Aside from the brain malformations, many individuals with TSC exhibit neuropsychiatric symptoms. Among these symptoms, autism spectrum disorder (ASD) is one of the most common co-morbidities, affecting up to 60% of the population. Past neuroimaging studies strongly suggested that the impairments in brain connectivity contribute to ASD, whether or not TSC-related. Specifically, the tract-based diffusion tensor imaging (DTI) analysis provides information on the fiber integrity and has been used to study the neuropathological changes in the white matter of TSC patients with ASD symptoms. In our previous study, curcumin, a diet-derived mTOR inhibitor has been shown to effectively mitigate learning and memory deficits and anxiety-like behavior in Tsc2+/− mice via inhibiting astroglial proliferation. Recently, gut microbiota, which is greatly influenced by the diet, has been considered to play an important role in regulating several components of the central nervous system, including glial functions. In this study, we showed that the abnormal social behavior in the Tsc2+/− mice can be ameliorated by the dietary curcumin treatment. Second, using tract-based DTI analysis, we found that the Tsc2+/− mice exhibited altered fractional anisotropy, axial and radial diffusivities of axonal bundles connecting the prefrontal cortex, nucleus accumbens, hypothalamus, and amygdala, indicating a decreased brain network. Third, the dietary curcumin treatment improved the DTI metrics, in accordance with changes in the gut microbiota composition. At the bacterial phylum level, we showed that the abundances of Actinobacteria, Verrucomicrobia, and Tenericutes were significantly correlated with the DTI metrics FA, AD, and RD, respectively. Finally, we revealed that the expression of myelin-associated proteins, myelin bassic protein (MBP) and proteolipid protein (PLP) was increased after the treatment. Overall, we showed a strong correlation between structural connectivity alterations and social behavioral deficits, as well as the diet-dependent changes in gut microbiota composition.

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