Reduced non-CpG methylation is a potential epigenetic target after spinal cord injury

DNA methylation is a critical epigenetic regulator in the occurrence and development of diseases and is closely related to various functional responses in relation to spinal cord injury.To investigate the role of DNA methylation in spinal cord injury,we constructed a library with reduced-representation bisulfite sequencing data obtained at various time points(day 0-42)after spinal cord injury in mice.Global DNA methylation levels,specifically non-CpG(CHG and CHH)methylation levels,decreased modestly following spinal cord injury.Stages post-spinal cord injury were classified as early(day 0-3),intermediate(day7-14),and late(day 28-42)based on similarity and hie rarchical cluste ring of global DNA methylation patterns.The non-CpG methylation level,which included CHG and CHH methylation levels,was markedly reduced despite accounting for a minor proportion of total methylation abundance.At multiple genomic sites,including the 5’untranslated regions,promoter,exon,intron,and 3’untranslated regions,the non-CpG methylation level was markedly decreased following spinal cord injury,whereas the CpG methylation level remained unchanged at these locations.Approximately one-half of the differentially methylated regions were located in intergenic areas;the other differentially methylated regions in both CpG and non-CpG regions were cluste red in intron regions,where the DNA methylation level was highest.The function of genes associated with differentially methylated regions in promoter regions was also investigated.From Gene Ontology analysis results,DNA methylation was implicated in a number of essential functional responses to spinal cord injury,including neuronal synaptic connection creation and axon regeneration.Notably,neither CpG methylation nor non-CpG methylation was implicated in the functional response of glial or inflammatory cells.In summary,our work elucidated the dynamic pattern of DNA methylation in the spinal co rd following injury and identified reduced nonCpG methylation as an epigenetic target after spinal cord injury in mice.

ERAS Optimization of Cluster Intervention Strategies in Perioperative Period of Acute Stanford Type A Aortic Dissection

Accelerated rehabilitation surgery (ERAS) can promote postoperative recovery and reduce postoperative complications by minimizing surgically related stress, and its efficacy and safety in acute aortic dissection surgery have been demonstrated. However, due to the particularity of acute aortic dissection, studies on the application of accelerated rehabilitation surgery in acute aortic dissection are relatively rare and there are great differences among different studies. This study adopts the method of evidence-based nursing practice accelerate rehabilitation cluster of surgical nursing strategy developed and applied to the patients with primary acute aortic dissection and adopts “accelerate rehabilitation cluster of surgical nursing strategy” and “accelerated rehabilitation cluster of surgical nursing strategies in patients with acute aortic dissection in clinical intervention”, the new nursing concept and organic combination of traditional nursing measures, using the optimal cluster nursing intervention mode, to explore the safety, effectiveness and feasibility of the intervention mode in the perioperative period of the original acute aortic dissection in patients’ cluster intervention, to accelerate the rehabilitation surgery in acute aortic dissection in the clinical care to provide a scientific basis for the operation.