TMEM59 Haploinsufficiency Ameliorates the Pathology and Cognitive Impairment in the 5xFAD Mouse Model of Alzheimer’s Disease

Jian, Meng; Han, Linkun; Zheng, Naizhen; Xu, Hui; Liu, Zhaoji; Zhang, Xian; Luo, Hong; Can, Dan; Sun, Hao; Xu, Huaxi; Zhang, Yunwu

doi:10.3389/fcell.2020.596030

Cited by 11 publications

(11 citation statements)

References 41 publications

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“…However, we decided to focus on 7-month-old mice as female 5XFAD mice show a robust Abeta pathology as well as severe memory deficits at this age. Furthermore, this age is often used as an endpoint in treatment studies in 5XFAD mice (66)(67)(68)(69)(70)(71). Thus, our present findings underline that PET imaging with 18 F-FDG-and 18 F-Florbetaben could provide a valuable and robust preclinical evaluation tool of therapeutic strategies modulating the AD pathology in 5XFAD mice.…”

Section: Discussionsupporting

confidence: 58%

Quantitative Brain Positron Emission Tomography in Female 5XFAD Alzheimer Mice: Pathological Features and Sex-Specific Alterations

et al. 2021

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Successful back-translating clinical biomarkers and molecular imaging methods of Alzheimer's disease (AD), including positron emission tomography (PET), are very valuable for the evaluation of new therapeutic strategies and increase the quality of preclinical studies. 18F-Fluorodeoxyglucose (FDG)–PET and 18F-Florbetaben–PET are clinically established biomarkers capturing two key pathological features of AD. However, the suitability of 18F-FDG– and amyloid–PET in the widely used 5XFAD mouse model of AD is still unclear. Furthermore, only data on male 5XFAD mice have been published so far, whereas studies in female mice and possible sex differences in 18F-FDG and 18F-Florbetaben uptake are missing. The aim of this study was to evaluate the suitability of 18F-FDG– and 18F-Florbetaben–PET in 7-month-old female 5XFAD and to assess possible sex differences between male and female 5XFAD mice. We could demonstrate that female 5XFAD mice showed a significant reduction in brain glucose metabolism and increased cerebral amyloid deposition compared with wild type animals, in accordance with the pathology seen in AD patients. Furthermore, we showed for the first time that the hypometabolism in 5XFAD mice is gender-dependent and more pronounced in female mice. Therefore, these results support the feasibility of small animal PET imaging with 18F-FDG- and 18F-Florbetaben in 5XFAD mice in both, male and female animals. Moreover, our findings highlight the need to account for sex differences in studies working with 5XFAD mice.

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Section: Discussionsupporting

confidence: 58%

Quantitative Brain Positron Emission Tomography in Female 5XFAD Alzheimer Mice: Pathological Features and Sex-Specific Alterations

et al. 2021

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“…2A,B). We generated Tmem59 conditional KO mice (Meng et al, 2020) and by crossing them with Lyz2-Cre and Zp3-Cre lines, we acquired mice that lack Tmem59 specifically in microglia (59 fl/fl ;Lyz2) and germline (Tmem59 À/À , KO), respectively (Fig. 2C,D).…”

Section: Decreased Tmem59 Expression In Asd Patientsmentioning

confidence: 99%

“…Recent studies suggest that TMEM59 can also modulate microglial activities and neuroinflammation (J. Wang et al, 2018;Z. Liu et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Microglial Tmem59 Deficiency Impairs Phagocytosis of Synapse and Leads to Autism-Like Behaviors in Mice

et al. 2022

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Synaptic abnormality is an important pathologic feature of autism spectrum disorders (ASDs) and responsible for various behavioral defects in these neurodevelopmental disorders. Microglia are the major immune cells in the brain and also play an important role in synapse refinement. Although dysregulated synaptic pruning by microglia during the brain development has been associated with ASDs, the underlying mechanism has yet to be fully elucidated. Herein, we observed that expression of Transmembrane protein 59 (TMEM59), a protein recently shown to regulate microglial function, was decreased in autistic patients. Furthermore, we found that both male and female mice with either complete or microglia-specific loss of Tmem59 developed ASD-like behaviors. Microglial TMEM59-deficient mice also exhibited enhanced excitatory synaptic transmission, increased dendritic spine density, and elevated levels of excitatory synaptic proteins in synaptosomes. TMEM59-deficient microglia had impaired capacity for synapse engulfment both in vivo and in vitro. Moreover, we demonstrated that TMEM59 interacted with the C1q receptor CD93 and TMEM59 deficiency promoted CD93 protein degradation in microglia. Downregulation of CD93 in microglia also impaired synapse engulfment. These findings identify a crucial role of TMEM59 in modulating microglial function on synapse refinement during brain development and suggest that TMEM59 deficiency may contribute to ASDs through disrupting phagocytosis of excitatory synapse and thus distorting the excitatory-inhibitory (E/I) neuronal activity balance.

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“…Aβ is the main component of amyloid plaques (Meng et al, 2020). Similarly, Aβ levels in the hippocampus and cortex of the 15w-Z group were significantly increased (p < 0.0001) (Figure 5B) compared with the 15w-L group.…”

Section: Zbpyr Modulated the Overall Composition Of Gut Microbiota And Key Bacterial Species In Zdf Ratsmentioning

confidence: 81%

ZiBuPiYin Recipe Prevented and Treated Cognitive Decline in ZDF Rats With Diabetes-Associated Cognitive Decline via Microbiota–Gut–Brain Axis Dialogue

Feng

Zhan

et al. 2021

Front. Cell Dev. Biol.

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Gut microbiota is becoming one of the key determinants in human health and disease. Shifts in gut microbiota composition affect cognitive function and provide new insights for the prevention and treatment of neurological diseases. Diabetes-associated cognitive decline (DACD) is one of the central nervous system complications of type 2 diabetes mellitus (T2DM). ZiBuPiYin recipe (ZBPYR), a traditional Chinese medicine (TCM) formula, has long been used for the treatment of T2DM and prevention of DACD. However, the contribution of ZBPYR treatment to the interaction between the gut microbiota and metabolism for preventing and treating DACD remains to be clarified. Here, we investigate whether the gut microbiota plays a key role in ZBPYR-mediated prevention of DACD and treatment of T2DM via incorporating microbiomics and metabolomics, and investigate the links between the microbiota–gut–brain axis interaction and the efficacy of ZBPYR in ZDF rats. In the current study, we found that ZBPYR treatment produced lasting changes in gut microbiota community and metabolites and remotely affected hippocampus metabolic changes, thereby improving memory deficits and reversing β-amyloid deposition and insulin resistance in the brain of ZDF rats from T2DM to DACD. This may be related to a series of metabolic changes affected by gut microbiota, including alanine, aspartic acid, and glutamic acid metabolism; branched-chain amino acid metabolism; short-chain fatty acid metabolism; and linoleic acid/unsaturated fatty acid metabolism. In summary, this study demonstrates that prevention and treatment of DACD by ZBPYR partly depends on the gut microbiota, and the regulatory effects of bacteria-derived metabolites and microbiota–gut–brain axis are important protective mechanisms of ZBPYR.

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TMEM59 Haploinsufficiency Ameliorates the Pathology and Cognitive Impairment in the 5xFAD Mouse Model of Alzheimer’s Disease

Cited by 11 publications

References 41 publications

Quantitative Brain Positron Emission Tomography in Female 5XFAD Alzheimer Mice: Pathological Features and Sex-Specific Alterations

Quantitative Brain Positron Emission Tomography in Female 5XFAD Alzheimer Mice: Pathological Features and Sex-Specific Alterations

Microglial Tmem59 Deficiency Impairs Phagocytosis of Synapse and Leads to Autism-Like Behaviors in Mice

ZiBuPiYin Recipe Prevented and Treated Cognitive Decline in ZDF Rats With Diabetes-Associated Cognitive Decline via Microbiota–Gut–Brain Axis Dialogue

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