Changes in Rat Brain MicroRNA Expression Profiles Following Sevoflurane and Propofol Anesthesia
Yu Lu, Min-Yu Jian, Yi-Bing Ouyang
1Department of Anesthesia, Beijing Tian Tan Hospital, Capital Medical University, Beijing 100050, China.
Background:
Sevoflurane and propofol are widely used anesthetics for surgery. Studies on the mechanisms of general anesthesia have focused on changes in protein expression properties and membrane lipid. MicroRNAs (miRNAs) regulate neural function by altering protein expression. We hypothesize that sevoflurane and propofol affect miRNA expression profiles in the brain, expect to understand the mechanism of anesthetic agents.
Methods:
Rats were randomly assigned to a 2% sevoflurane group, 600 μg·kg - 1·min - 1 propofol group, and a control group without anesthesia (n = 4, respectively). Treatment group was under anesthesia for 6 h, and all rats breathed spontaneously with continuous monitoring of respiration and blood gases. Changes in rat cortex miRNA expression profiles were analyzed by miRNA microarrays and validated by quantitative real-time polymerase chain reaction (qRT-PCR). Differential expression of miRNA using qRT-PCR among the control, sevoflurane, and propofol groups were compared using one-way analysis of variance (ANOVA).
Results:
Of 677 preloaded rat miRNAs, the microarray detected the expression of 277 miRNAs in rat cortex (40.9%), of which 9 were regulated by propofol and (or) sevoflurane. Expression levels of three miRNAs (rno-miR-339-3p, rno-miR-448, rno-miR-466b-1FNx01) were significantly increased following sevoflurane and six (rno-miR-339-3p, rno-miR-347, rno-miR-378FNx01, rno-miR-412FNx01, rno-miR-702-3p, and rno-miR-7a-2FNx01) following propofol. Three miRNAs (rno-miR-466b-1FNx01, rno-miR-3584-5p and rno-miR-702-3p) were differentially expressed by the two anesthetic treatment groups.
Conclusions:
Sevoflurane and propofol anesthesia induced distinct changes in brain miRNA expression patterns, suggesting differential regulation of protein expression. Determining the targets of these differentially expressed miRNAs may help reveal both the common and agent-specific actions of anesthetics on neurological and physiological function.
Insights
Sevoflurane and propofol anesthesia alter brain microRNA (miRNA) expression profiles. These changes suggest differential regulation of protein expression, offering insights into anesthetic mechanisms.
Area of Science:
- Neuroscience
- Molecular Biology
- Anesthesiology
Background:
- Sevoflurane and propofol are common anesthetics.
- General anesthesia mechanisms are studied via protein and lipid changes.
- MicroRNAs (miRNAs) regulate neural function by altering protein expression.
Purpose of the Study:
- Investigate the impact of sevoflurane and propofol on brain miRNA expression.
- Elucidate the mechanisms of anesthetic agents through miRNA profiling.
Main Methods:
- Rats were exposed to sevoflurane, propofol, or no anesthesia for 6 hours.
- Cortex miRNA expression profiles were analyzed using miRNA microarrays.
- Quantitative real-time polymerase chain reaction (qRT-PCR) validated differential miRNA expression.
Main Results:
- Microarrays detected 277 rat cortex miRNAs, with 9 regulated by sevoflurane and/or propofol.
- Sevoflurane increased three specific miRNAs; propofol increased six specific miRNAs.
- Three miRNAs showed differential expression between the sevoflurane and propofol groups.
Conclusions:
- Anesthesia with sevoflurane and propofol induces distinct changes in brain miRNA expression.
- These alterations suggest differential regulation of protein expression by anesthetics.
- Identifying miRNA targets may reveal common and specific anesthetic actions on neurological function.
