Postoperative cognitive dysfunction is a well-recognized complication after major surgery in the elderly, but its pathophysiological mechanism is not fully understood. In the present study, we used liquid chromatography-tandem mass spectrometry combined with tandem mass tags to identify differentially expressed proteins and perform further functional studies on protein of interest. Here, we showed that hippocampal complement C3 was significantly upregulated after surgery, which was accompanied by marked decreases in synaptic related proteins and density. In aged patients undergoing gastrointestinal surgery, we also found significantly increased plasma level of C3b postoperatively and were negatively associated with cognitive performance. Notably, selective inhibition of complement C3 by compstatin was able to rescue synaptic and cognitive impairments induced by surgery in aged mice. Collectively, our study confirms that surgery can induce cognitive impairments, and the possible mechanisms might be related to abnormal complement signaling and synaptic disruption.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1097/WNR.0000000000001422 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Fetal growth restriction adversely impacts trajectory of hippocampal neurodevelopment and function.
Brain Pathol
January 2025
The Ritchie Centre, Hudson Institute of Medical Research, Translational Research Facility, Clayton, VIC, Australia.
The last pregnancy trimester is critical for fetal brain development but is a vulnerable period if the pregnancy is compromised by fetal growth restriction (FGR). The impact of FGR on the maturational development of neuronal morphology is not known, however, studies in fetal sheep allow longitudinal analysis in a long gestation species. Here we compared hippocampal neuron dendritogenesis in FGR and control fetal sheep at three timepoints equivalent to the third trimester of pregnancy, complemented by magnetic resonance image for brain volume, and electrophysiology for synaptic function.
View Article and Find Full Text PDFMicroglia and Immune cells interactions in multiple sclerosis cognitive impairment: a postmortem study.
J Neuroinflammation
December 2024
Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Lisboa, Portugal.
Multiple Sclerosis (MS), a neuroinflammatory disease of the central nervous system, is one of the commonest causes of non-traumatic disability among young adults. Impaired cognition arises as an impactful symptom affecting more than 50% of the patients and with substantial impact on social, economic, and individual wellbeing. Despite the lack of therapeutic strategies, many efforts have been made to understand the mechanisms behind cognitive impairment in MS patients.
View Article and Find Full Text PDFXixin Decoction May Treat VaD by Modulating the NPTX2/C1q/C3 Complement Pathway.
Chem Biodivers
December 2024
Xi'an Jiaotong University, pathology, No.76 Yanta West Road, Xi'an, Shaanxi 710061, China, 710061, Xian, CHINA.
Vascular dementia (VaD) is a type of dementia that results from brain injury caused by cerebrovascular disease or vascular risk factors. Accumulating evidence from clinical studies has found that Xixin decoction can effectively improve the cognitive function of patients with VaD and improve their daily living ability. However, the pathogenesis of VaD is not fully understood, and the therapeutic mechanism of Xixin decoction is also unclear.
View Article and Find Full Text PDFEnvironmental exposure to common pesticide induces synaptic deficit and social memory impairment driven by neurodevelopmental vulnerability of hippocampal parvalbumin interneurons.
J Hazard Mater
December 2024
Department of Pharmacology & Toxicology, University of Texas Medical Branch, Galveston, TX 77555, USA; Center for Precision Environmental Health, Baylor College of Medicine, Houston, TX 77030, USA. Electronic address:
Environmental exposure to pesticides at levels deemed safe by regulatory agencies has been linked to increased risk for neurodevelopmental disorders. Yet, the mechanisms linking exposure to these disorders remain unclear. Here, we show that maternal exposure to the pesticide deltamethrin (DM) at the no observed adverse effect level (NOAEL) disrupts long-term potentiation (LTP) in the hippocampus of adult male offspring three months after exposure, a phenotype absent in female offspring.
View Article and Find Full Text PDFSTING Driving Synaptic Phagocytosis of Hippocampal Microglia/Macrophages Contributes to Cognitive Impairment in Sepsis-Associated Encephalopathy in Mice.
CNS Neurosci Ther
December 2024
Department of Anesthesiology, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China.
Background: Sepsis-associated encephalopathy (SAE) is a serious neurologic complication in septic patients with poor prognoses. There is increasing evidence that stimulator of interferon genes (STING) plays a crucial role in neuroinflammation and cognitive impairment. However, whether sepsis associated with STING changes contributes to cognitive impairment is unknown.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!