Diabetes & Metabolism Journal

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Association between Type 2 Diabetes Mellitus and Brain Atrophy: A Meta-Analysis (Diabetes Metab J 2022;46:781-802): Tianqi Zhang, Marnie Shaw, Nicolas Cherbuin; Diabetes Metab J. 2022;46(5):815-816. Published online September 19, 2022; DOI: https://doi.org/10.4093/dmj.2022.0296; [Original]

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Current Insights on the Use of Insulin and the Potential Use of Insulin Mimetics in Targeting Insulin Signalling in Alzheimer’s Disease
Amy Woodfield, Tatiana Gonzales, Erik Helmerhorst, Simon Laws, Philip Newsholme, Tenielle Porter, Giuseppe Verdile
International Journal of Molecular Sciences.2022; 23(24): 15811. CrossRef

Original Article

Complication
Association between Type 2 Diabetes Mellitus and Brain Atrophy: A Meta-Analysis: Tianqi Zhang, Marnie Shaw, Nicolas Cherbuin; Diabetes Metab J. 2022;46(5):781-802. Published online March 8, 2022; DOI: https://doi.org/10.4093/dmj.2021.0189

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Background
Type 2 diabetes mellitus (T2DM) is known to be associated with cognitive decline and brain structural changes. This study systematically reviews and estimates human brain volumetric differences and atrophy associated with T2DM.
Methods
PubMed, PsycInfo and Cochrane Library were searched for brain imaging studies reporting on brain volume differences between individuals with T2DM and healthy controls. Data were examined using meta-analysis, and association between age, sex, diabetes characteristics and brain volumes were tested using meta-regression.
Results
A total of 14,605 entries were identified; after title, abstract and full-text screening applying inclusion and exclusion criteria, 64 studies were included and 42 studies with compatible data contributed to the meta-analysis (n=31,630; mean age 71.0 years; 44.4% male; 26,942 control; 4,688 diabetes). Individuals with T2DM had significantly smaller total brain volume, total grey matter volume, total white matter volume and hippocampal volume (approximately 1% to 4%); meta-analyses of smaller samples focusing on other brain regions and brain atrophy rate in longitudinal investigations also indicated smaller brain volumes and greater brain atrophy associated with T2DM. Meta-regression suggests that diabetes-related brain volume differences start occurring in early adulthood, decreases with age and increases with diabetes duration.
Conclusion
T2DM is associated with smaller total and regional brain volume and greater atrophy over time. These effects are substantial and highlight an urgent need to develop interventions to reduce the risk of T2DM for brain health.

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Association between Type 2 Diabetes Mellitus and Brain Atrophy: A Meta-Analysis (Diabetes Metab J 2022;46:781-802)
Tianqi Zhang, Marnie Shaw, Nicolas Cherbuin
Diabetes & Metabolism Journal.2022; 46(5): 815. CrossRef
Association between Type 2 Diabetes Mellitus and Brain Atrophy: A Meta-Analysis (Diabetes Metab J 2022;46:781-802)
Se Hee Min
Diabetes & Metabolism Journal.2022; 46(5): 813. CrossRef
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Erratum

MondoA Is Required for Normal Myogenesis and Regulation of the Skeletal Muscle Glycogen Content in Mice: Hui Ran, Yao Lu, Qi Zhang, Qiuyue Hu, Junmei Zhao, Kai Wang, Xuemei Tong, Qing Su; Diabetes Metab J. 2021;45(5):797-797. Published online September 30, 2021; DOI: https://doi.org/10.4093/dmj.2021.0251; Corrects: Diabetes Metab J 2021;45(3):439

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Attenuated glucose uptake promotes catabolic metabolism through activated AMPK signaling and impaired insulin signaling in zebrafish
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Frontiers in Nutrition.2023;[Epub] CrossRef
Glucose-induced and ChREBP: MLX-mediated lipogenic program promotes hepatocellular carcinoma development
Aijuan Yu, Pengcheng Yu, Yuwen Zhu, Rui Zhu, Renqiang Sun, Dan Ye, Fa-Xing Yu
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Original Article

Basic Research
MondoA Is Required for Normal Myogenesis and Regulation of the Skeletal Muscle Glycogen Content in Mice: Hui Ran, Yao Lu, Qi Zhang, Qiuyue Hu, Junmei Zhao, Kai Wang, Xuemei Tong, Qing Su; Diabetes Metab J. 2021;45(3):439-451. Published online May 18, 2020; DOI: https://doi.org/10.4093/dmj.2019.0212; Correction in: Diabetes Metab J 2021;45(5):797

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Background

Skeletal muscle is the largest tissue in the human body, and it plays a major role in exerting force and maintaining metabolism homeostasis. The role of muscle transcription factors in the regulation of metabolism is not fully understood. MondoA is a glucose-sensing transcription factor that is highly expressed in skeletal muscle. Previous studies suggest that MondoA can influence systemic metabolism homeostasis. However, the function of MondoA in the skeletal muscle remains unclear.

Methods

We generated muscle-specific MondoA knockout (MAKO) mice and analyzed the skeletal muscle morphology and glycogen content. Along with skeletal muscle from MAKO mice, C2C12 myocytes transfected with small interfering RNA against MondoA were also used to investigate the role and potential mechanism of MondoA in the development and glycogen metabolism of skeletal muscle.

Results

MAKO caused muscle fiber atrophy, reduced the proportion of type II fibers compared to type I fibers, and increased the muscle glycogen level. MondoA knockdown inhibited myoblast proliferation, migration, and differentiation by inhibiting the phosphatase and tensin homolog (PTEN)/phosphoinositide 3-kinase (PI3K)/Akt pathway. Further mechanistic experiments revealed that the increased muscle glycogen in MAKO mice was caused by thioredoxin-interacting protein (TXNIP) downregulation, which led to upregulation of glucose transporter 4 (GLUT4), potentially increasing glucose uptake.

Conclusion

MondoA appears to mediate mouse myofiber development, and MondoA decreases the muscle glycogen level. The findings indicate the potential function of MondoA in skeletal muscle, linking the glucose-related transcription factor to myogenesis and skeletal myofiber glycogen metabolism.

Citations

Citations to this article as recorded by

The Function of MondoA and ChREBP Nutrient—Sensing Factors in Metabolic Disease
Byungyong Ahn
International Journal of Molecular Sciences.2023; 24(10): 8811. CrossRef
Normal and Neoplastic Growth Suppression by the Extended Myc Network
Edward V. Prochownik, Huabo Wang
Cells.2022; 11(4): 747. CrossRef
The Role of Mondo Family Transcription Factors in Nutrient-Sensing and Obesity
Huiyi Ke, Yu Luan, Siming Wu, Yemin Zhu, Xuemei Tong
Frontiers in Endocrinology.2021;[Epub] CrossRef

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