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Published on: April 13, 2017
Role of microglia-neuron interactions in diabetic encephalopathy
Yuan Liu1, Mingchao Li1, Zuo Zhang2
1Department of Pharmacy, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, China; National Drug Clinical Trial Institution, The Second Affiliated Hospital, Army Medical University, Chongqing, 400037, China.
Abstract:
In the central nervous system, the primary immune cells, the microglia, prevent pathogenic invasion as the first line of defense. Microglial energy consumption is dependent on their degree of activity. Microglia express transporters for the three primary energy substrates (glucose, fatty acids, glutamine) and regulate diabetic encephalopathy via microglia-neuron interactions. Microglia may play a sentry role for rapid protection or even ablation of impaired neurons. Neurons exhibit hyperactivity in response to hyperglycemia, hyperlipidemia, and neurotoxic factors and release potential microglial activators. Microglial activation is also regulated by proinflammatory factors, caspase-3 activity, P2X7 receptor, interferon regulatory factor-8, and glucocorticoids. Modulation of microglia in diabetic encephalopathy may involve CX3CL1, p38 MAPK, purinergic, and CD200/CD200R signaling pathways, and pattern recognition receptors. The microglia-neuron interactions play an important role in diabetic encephalopathy, and modulation of microglial activation may be a therapeutic target for diabetic encephalopathy.
Insights
Microglia, the brain's immune cells, are crucial in diabetic encephalopathy. Their activation, influenced by neuronal signals and metabolic changes, presents a potential therapeutic target for this condition.
Area of Science:
- Neuroscience
- Immunology
- Metabolic Disorders
Background:
- Microglia are the primary immune cells in the central nervous system, acting as the first line of defense.
- Microglial activity and energy metabolism are closely linked and crucial for neuronal health.
- Microglia-neuron interactions are implicated in the pathogenesis of diabetic encephalopathy.
Purpose of the Study:
- To explore the role of microglia and their interactions with neurons in diabetic encephalopathy.
- To identify potential therapeutic targets for modulating microglial activity in this condition.
Main Methods:
- The study reviews the expression of energy substrate transporters in microglia.
- It discusses the regulation of microglial activation by various factors, including neuronal signals and inflammatory mediators.
- The role of specific signaling pathways (e.g., CX3CL1, p38 MAPK) in microglia-neuron interactions within diabetic encephalopathy is examined.
Main Results:
- Microglia utilize glucose, fatty acids, and glutamine, with consumption varying by activity level.
- Hyperactive neurons in hyperglycemia/hyperlipidemia release factors that activate microglia.
- Microglial activation is modulated by inflammatory factors, cellular signaling pathways, and pattern recognition receptors.
Conclusions:
- Microglia-neuron interactions are significant in diabetic encephalopathy.
- Targeting microglial activation pathways offers a promising therapeutic strategy for managing diabetic encephalopathy.
