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吸入氢气对重症急性胰腺炎大鼠肺损伤的影响

2020-06-27滕娜孙明洁李会

中国医药导报 2020年15期
关键词:氢气胰腺炎

滕娜 孙明洁 李会

[摘要] 目的 探讨吸入氢气(H2)对重症急性胰腺炎(SAP)大鼠肺损伤的影响。 方法 选取健康雄性SPF级Wistar大鼠48只,采用随机数字表法分为四组(每组12只):假手术组(SH组)、重症胰腺炎组(SAP组)、1%H2组、2%H2组。除SH组,各组通过逆行胰胆管注射5%牛磺胆酸钠的方法制作大鼠SAP模型。1%H2组和2%H2组在模型制作过程中及造模成功后24 h持续吸入相应浓度的H2。造模后24 h采集股动脉血行血气分析并计算氧合指数(PaO2/FiO2),随后处死大鼠测定肺湿干重比(W/D)并进行肺组织损伤评分,酶聯免疫吸附法测定肺组织中8-羟基脱氧鸟苷(8-OHdG)、Toll样受体4(TLR-4)、核因子-κB(NF-κB)、肿瘤坏死因子-α(TNF-α)、白细胞介素-1β(IL-1β)、IL-6水平。 结果 与SH组比较,SAP组、l%H2组、2%H2组的W/D比值、肺组织损伤评分、8-OHdG、TLR-4、NF-κB、TNF-α、IL-1β、IL-6显著升高,PaO2/FiO2降低(P < 0.05)。与SAP组比较,1%H2组、2%H2组的W/D比值、肺组织损伤评分、8-OHdG、TLR-4、NF-κB、TNF-α、IL-1β、IL-6显著降低,PaO2/FiO2升高(P < 0.05)。1%H2组与2%H2组上述各指标比较,差异无统计学意义(P > 0.05)。 结论 吸入H2能减轻重症急性胰腺炎所致肺损伤,其机制可能与抑制炎性反应和氧化应激有关。

[关键词] 氢气;胰腺炎;肺损伤;大鼠

[中图分类号] R657.5          [文献标识码] A          [文章编号] 1673-7210(2020)05(c)-0026-04

Effect of hydrogen inhalation on lung injury induced by severe acute pancreatitis in rats

TENG Na   SUN Mingjie   LI Hui▲

Department of Anesthesia Operating, Qingdao Municipal Hospital, Shandong Province, Qingdao   266011, China

[Abstract] Objective To investigate the effect of hydrogen(H2) inhalation on lung injury in rats with severe acute pancreatitis (SAP). Methods Forty-eight healthy male SPF Wistar rats were selected, four groups (12 in each group) were divided into 4 groups by random number table method, sham operation group (SH group), severe pancreatitis group (SAP group), 1%H2 group, 2%H2 group. With the exception of SH group, the rat SAP model was made by injecting 5% sodium taurocholate into each group through retrograde cholangiopancreatine. H2 group 1% and H2 group 2% continuously inhaled H2 at the corresponding concentration during the process of model making and 24 h after successful model making. Blood gas analysis and oxygenation index (PaO2/FiO2) were calculated after 24 h of femoral arterial blood collection after modeling. The rats were then sacrificed to determine the lung wet-to-dry weight ratio (W/D) and the lung tissue injury score. The enzyme linked immunosorbent method was used for determination of levels of 8-hydroxyl deoxyguanosine (8-OHdG), toll-like receptor 4 (TLR-4), nuclear factor-κB (NF-κB), tumor necrosis factor-α (TNF-α), interleukin 1β (IL-1β), IL-6 in the lung tissues. Results Compared with SH group, the W/D ratio of SAP group, 1%H2 group, 1%H2 group were analyzed, the lung tissue damage rating, 8-OHdG, TLR-4, NF-κB, TNF-α, IL-1β, IL-6 and IL-1 increased significantly, PaO2/FiO2 decreased (P < 0.05). Compared with SAP group, W/D ratio, lung tissue damage rating, 8-OHdG, TLR-4, NF-κB, TNF-α, IL-1β, IL-6 and IL-1 in 1%H2 group and 2%H2 group significantly reduced, PaO2/FiO2 elevated (P < 0.05). There was no significant difference in the above indicators between the 1%H2 group and the 2%H2 group (P > 0.05). Conclusion Inhalation of H2 can reduce lung injury caused by severe acute pancreatitis, and the mechanism may be related to inhibition of inflammatory response and oxidative stress.

H2是一種电中性的小分子,细胞膜通透性强,可自由进入细胞内,顺利到达靶器官[9-10]。由于半衰期短,只能在持续吸入H2过程中才能发挥其生物作用[11-12]。本研究在制作重症胰腺炎模型全程中持续吸入1%、2%H2。与SAP组比较,吸入1%H2、2%H2能明显降低胰腺炎导致的肺损伤,改善肺功能。

氧自由基具有很强的氧化性,尤其是细胞毒性极强的羟自由基,直接损伤肺泡细胞膜和肺血管内皮[13]。8-OHdG是DNA氧化损伤最重要且敏感的标志物,也是评价机体氧化损伤的指标[14-15]。本研究中,与SH组比较,各组8-OHdG均有不同程度升高(P < 0.05),提示重症胰腺炎导致明显的肺组织氧化损伤。而与SAP组比较,吸入1%、2%H2能够明显降低肺组织中8-OHdG水平,结果提示吸入H2可能通过抑制氧化应激,减轻重症胰腺炎导致肺损伤。

TLR-4是诱导炎性反应的门户蛋白,研究显示它在多种病理反应中起重要作用[16-17]。重症胰腺炎时有大量的炎性因子释放入血[18],可激活Toll-4信号通路,通过多种途径使作为炎性反应下游环节的NF-κB活化,活化的NF-κB进入核内调节相应基因的表达,可诱导产生多种促炎性细胞因子(如TNF-α等)的表达[19]。TNF-α是炎性反应重要的启动因子,能在细胞以及亚细胞水平上发生级联反应,诱导IL-1β、IL-6产生,在全身炎性反应尤其是肺损伤中的发挥着重要作用[20-22]。本研究结果显示,和SH组比较,l%H2组和2%H2组的NF-кB、TNF-α、IL-1β、IL-6表达水平明显升高(P < 0.05),而吸入H2明显抑制炎症介质表达。

综上所述,吸入H2能明显减轻急性胰腺炎所致肺损伤,其机制可能与抑制氧化应激和炎性反应有关。

[参考文献]

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[2]  Lei H,Minghao W,Xiaonan Y,et al. Acute lung injury in patients with severe acute pancreatitis [J]. Turk J Gastroenterol,2013,24(6):502-507.

[3]  Wang H,Wang S,Tang A,et al. Combined effects of sivelestat and resveratrol on severe acute pancreatitis-associated lung injury in rats [J]. Exp Lung Res,2014,40(6):288-297.

[4]  Ohsawa I,Ishikawa M,Takahaski K,et al. Hydrogen acts as a therapeutic antioxidant by selectively reducing cytotoxic oxygen radicals [J]. Nat Med,2007,13(6):688-693.

[5]  de-Madaria E,del Mar Francés M,Gea-Sorlí S,et al. Role of protease-activated receptor 2 in lung injury development during acute pancreatitis in rats [J]. Pancreas,2014, 43(6):895-902.

[6]  Kosaka J,Morimatsu H,Takahashi T,et al. Effects of biliverdin administration on acute lung injury induced by hemorrhagic shock and resuscitation in rats [J]. PLoS One,2013,8(5):e63606.

[7]  Kozian A,Schilling T,Freden F,et al. One-lung ventilation induces hyperperfusion and alveolar damage in the ventilated lung:all experimental study [J]. Br J Anaesth,2008,100(4):549-559.

[8]  Ohtsuki M,Taketomi Y,Arata S,et al. Transgenic expression of group V,but not group X,secreted phospholipase A2 in mice leads to neonatal lethality because of lung dysfunction [J]. J Biol Chem,2006,281(47):36420-36433.

[9]  He K. Yan L,Pan CS,et al. ROCK-dependent ATP5D modulation contributes to the protection of notoginsenoside NR1 against ischemia-reperfusion-induced myocardial injury [J]. Am J Physiol Heart Circ Physiol,2014,307(12):1764-1776.

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