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探讨高脂肪营养对迷走神经切断大鼠脂多糖诱导的急性肺损伤的调节作用及迷走神经的作用。

Exploring the Modulatory Effect of High-Fat Nutrition on Lipopolysaccharide-Induced Acute Lung Injury in Vagotomized Rats and the Role of the Vagus Nerve.

机构信息

Department of Surgery, University Medical Center Utrecht, Utrecht University, 3584 Utrecht, The Netherlands.

Department of Surgery, Catharina Hospital, 5623 Eindhoven, The Netherlands.

出版信息

Nutrients. 2023 May 16;15(10):2327. doi: 10.3390/nu15102327.

Abstract

During esophagectomy, the vagus nerve is transected, which may add to the development of postoperative complications. The vagus nerve has been shown to attenuate inflammation and can be activated by a high-fat nutrition via the release of acetylcholine. This binds to α7 nicotinic acetylcholine receptors (α7nAChR) and inhibits α7nAChR-expressing inflammatory cells. This study investigates the role of the vagus nerve and the effect of high-fat nutrition on lipopolysaccharide (LPS)-induced lung injury in rats. Firstly, 48 rats were randomized in 4 groups as follows: sham (sparing vagus nerve), abdominal (selective) vagotomy, cervical vagotomy and cervical vagotomy with an α7nAChR-agonist. Secondly, 24 rats were randomized in 3 groups as follows: sham, sham with an α7nAChR-antagonist and cervical vagotomy with an α7nAChR-antagonist. Finally, 24 rats were randomized in 3 groups as follows: fasting, high-fat nutrition before sham and high-fat nutrition before selective vagotomy. Abdominal (selective) vagotomy did not impact histopathological lung injury (LIS) compared with the control (sham) group ( > 0.999). There was a trend in aggravation of LIS after cervical vagotomy ( = 0.051), even after an α7nAChR-agonist ( = 0.090). Cervical vagotomy with an α7nAChR-antagonist aggravated lung injury ( = 0.004). Furthermore, cervical vagotomy increased macrophages in bronchoalveolar lavage (BAL) fluid and negatively impacted pulmonary function. Other inflammatory cells, TNF-α and IL-6, in the BALF and serum were unaffected. High-fat nutrition reduced LIS after sham ( = 0.012) and selective vagotomy ( = 0.002) compared to fasting. vagotomy. This study underlines the role of the vagus nerve in lung injury and shows that vagus nerve stimulation using high-fat nutrition is effective in reducing lung injury, even after selective vagotomy.

摘要

在食管切除术期间,迷走神经被切断,这可能会增加术后并发症的发展。迷走神经已被证明可以减轻炎症,并且可以通过释放乙酰胆碱被高脂肪营养激活。这与α7 烟碱型乙酰胆碱受体(α7nAChR)结合并抑制表达α7nAChR 的炎症细胞。本研究调查了迷走神经的作用以及高脂肪营养对大鼠脂多糖(LPS)诱导的肺损伤的影响。首先,将 48 只大鼠随机分为 4 组:假手术(保留迷走神经)、腹部(选择性)迷走神经切断术、颈部迷走神经切断术和颈部迷走神经切断术加α7nAChR 激动剂。其次,将 24 只大鼠随机分为 3 组:假手术、假手术加α7nAChR 拮抗剂和颈部迷走神经切断术加α7nAChR 拮抗剂。最后,将 24 只大鼠随机分为 3 组:禁食、假手术前高脂肪营养和选择性迷走神经切断术前高脂肪营养。与对照组(假手术)相比,腹部(选择性)迷走神经切断术对组织病理学肺损伤(LIS)没有影响(>0.999)。颈部迷走神经切断术后 LIS 加重的趋势(=0.051),即使给予α7nAChR 激动剂(=0.090)也是如此。颈部迷走神经切断术加α7nAChR 拮抗剂加重了肺损伤(=0.004)。此外,颈部迷走神经切断术增加了支气管肺泡灌洗液(BAL)中的巨噬细胞,并对肺功能产生负面影响。BALF 和血清中的其他炎症细胞、TNF-α 和 IL-6 不受影响。与禁食相比,高脂肪营养减少了 sham(=0.012)和选择性迷走神经切断术后的 LIS(=0.002)。这项研究强调了迷走神经在肺损伤中的作用,并表明使用高脂肪营养刺激迷走神经可有效减轻肺损伤,即使在选择性迷走神经切断术后也是如此。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0080/10220714/264624571fec/nutrients-15-02327-g001.jpg

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