Validation experiment designed to validate causal mechanisms targeting C1q in LPS-treated mice. Primary outcome: depressive and anxiety-like behaviors, synaptic loss, abnormal microglial phagocytosis
This experiment used lipopolysaccharide (LPS) administration to induce a mouse model of depression. Researchers examined the effects of LPS on multiple parameters including depressive and anxiety-like behaviors, synaptic integrity, microglial activation, and microglial phagocytosis of synapses in the hippocampal dentate gyrus. The study focused on understanding how activated microglia dysfunctionally engulf neuronal synapses under depressive conditions, leading to synaptic loss and behavioral impairments. The complement C1q/C3-CR3 signaling pathway was investigated as a potential mediator of this abnormal microglial-synaptic interaction. Behavioral assessments were conducted to evaluate depression and anxiety-like phenotypes, while histological and molecular analyses were performed to assess synaptic density, microglial activation status, and phagocytic activity.
LPS administration to mice followed by behavioral testing, histological analysis of hippocampal dentate gyrus, assessment of microglial phagocytosis of synapses, and evaluation of C1q/C3-CR3 signaling pathway components
LPS treatment would induce depressive behaviors, activate microglia, increase synaptic phagocytosis, and activate complement signaling
demonstration of behavioral deficits, synaptic loss, and increased microglial phagocytosis in LPS-treated mice
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