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Central nervous system sulfatide deficiency as a causal factor for bladder disorder in Alzheimer's disease.


ABSTRACT:

Background

Despite being a brain disorder, Alzheimer's disease (AD) is often accompanied by peripheral organ dysregulations (e.g., loss of bladder control in late-stage AD), which highly rely on spinal cord coordination. However, the causal factor(s) for peripheral organ dysregulation in AD remain elusive.

Methods

The central nervous system (CNS) is enriched in lipids. We applied quantitative shotgun lipidomics to determine lipid profiles of human AD spinal cord tissues. Additionally, a CNS sulfatide (ST)-deficient mouse model was used to study the lipidome, transcriptome and peripheral organ phenotypes of ST loss.

Results

We observed marked myelin lipid reduction in the spinal cord of AD subjects versus cognitively normal individuals. Among which, levels of ST, a myelin-enriched lipid class, were strongly and negatively associated with the severity of AD. A CNS myelin-specific ST-deficient mouse model was used to further identify the causes and consequences of spinal cord lipidome changes. Interestingly, ST deficiency led to spinal cord lipidome and transcriptome profiles highly resembling those observed in AD, characterized by decline of multiple myelin-enriched lipid classes and enhanced inflammatory responses, respectively. These changes significantly disrupted spinal cord function and led to substantial enlargement of urinary bladder in ST-deficient mice.

Conclusions

Our study identified CNS ST deficiency as a causal factor for AD-like lipid dysregulation, inflammation response and ultimately the development of bladder disorders. Targeting to maintain ST levels may serve as a promising strategy for the prevention and treatment of AD-related peripheral disorders.

SUBMITTER: He S 

PROVIDER: S-EPMC10361545 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature

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Publications

Central nervous system sulfatide deficiency as a causal factor for bladder disorder in Alzheimer's disease.

He Sijia S   Qiu Shulan S   Pan Meixia M   Palavicini Juan P JP   Wang Hu H   Li Xin X   Bhattacharjee Anindita A   Barannikov Savannah S   Bieniek Kevin F KF   Dupree Jeffrey L JL   Han Xianlin X  

Clinical and translational medicine 20230701 7


<h4>Background</h4>Despite being a brain disorder, Alzheimer's disease (AD) is often accompanied by peripheral organ dysregulations (e.g., loss of bladder control in late-stage AD), which highly rely on spinal cord coordination. However, the causal factor(s) for peripheral organ dysregulation in AD remain elusive.<h4>Methods</h4>The central nervous system (CNS) is enriched in lipids. We applied quantitative shotgun lipidomics to determine lipid profiles of human AD spinal cord tissues. Additiona  ...[more]

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