羅格列酮對重癥急性胰腺炎的保護作用
【摘要】 目的:探討羅格列酮對重癥急性胰腺炎(SAP)的保護作用及其作用機制。方法:72只健康SD大鼠隨機分為3組:假手術組(SO組)、SAP組及羅格列酮處理組。采用經十二指腸胰膽管逆行注射5%牛磺膽酸鈉誘導大鼠SAP模型,于模型制作前30min腹腔內注射羅格列酮(10mg/kg)進行預處理,各組于術后3h、6h和12h分批處死動物,觀察各組大鼠血漿淀粉酶、TNFα、IL6、胰腺組織髓過氧化物酶(MPO)水平的變化以及胰腺組織病理改變,并進行病理學評分。結果:SAP組血漿淀粉酶、TNFα、IL6、胰腺組織MPO、胰腺組織病理學評分較SO組均明顯升高(P<0.05),羅格列酮處理組各時間點血漿淀粉酶、TNFα、IL6、胰腺組織MPO水平均較SAP組顯著降低(P<0.05),6h、12h胰腺組織病理評分均顯著低于SAP組(P<0.05),各時間點胰腺組織病理損傷較SAP組明顯減輕。結論:羅格列酮可能通過減少TNFα、IL6的產生,減輕胰腺組織損傷,從而改善SAP病情。
【關鍵詞】 急性胰腺炎;羅格列酮;細胞因子
[ABSTRACT] Objective: To investigate the protective effect and mechanism of rosiglitazone on severe acute pancreatitis (SAP). Methods: Seventytwo SD rats were randomized into three groups: sham operation (SO)group, SAP group and rosiglitazone pretreated group. The model of SAP was induced by retrograde injection of 5% sodium taurocholate into the bilipancreatic duct in SD rats, rosiglitazone pretreated group was given by 10 mg/kg rosiglitazone intraperitoneally 30 min before inducing SAP. Rats in the three groups were killed at 3, 6, 12 hours after induction of the model. The levels of amylase, TNFα, IL6 in plasm were measured.The myeloperoxidase (MPO) of pancreas were also measured. The histopathological changes and the histologic scores of pancreatic tissue were eva luated. Results: Compared with SO group, the levels of plasm amylase,TNFα, IL6, the intrapancreatic MPO significantly increased in SAP group(P<0.05), and the histologic scores of pancreatic tissue significantly decreased in SAP group(P<0.01), and the pancreas injury were aggravated gradually. Compared with SAP group, the levels of plasm amylase, TNFα, IL6 ,intrapancreatic MPO significantly decreased in rosiglitazonepretreated group at 3 h, 6 h, 12 h(P<0.05), the pancreatic histopathologic scores significantly decreased in rosiglitazonepretreated group at 6 h, 12 h(P<0.05), and the severity of pancreas injury also significantly decreased in rosiglitazone pretreated group. Conclusions: Rosiglitazone might have therapeutic effect on SAP by decreasing the production of TNFα and IL6.
[KEY WORDS] Pancreatitis; Rosiglitazone; Cytokine
重癥急性胰腺炎(severe acute pancreatitis,SAP)是臨床常見危重疾病,病情進展迅速,早期容易并發全身炎癥反應綜合征(systemic inflammatory response syndrome, SIRS)和多器官功能障礙綜合征(multiple organ dysfunction syndrome, MODS),死亡率高。因此,早期干預治療防止急性胰腺炎(acute pancreatitis, AP)由輕型向重癥發展成為目前重要的研究課題。本實驗通過建立大鼠SAP模型,應用過氧化物酶增殖物活化受體γ(PPARγ)激動劑羅格列酮對大鼠SAP進行干預處理,以探討羅格列酮對SAP的保護作用及其作用機制。
1 材料與方法
蔡篤雄等.羅格列酮對重癥急性胰腺炎的保護作用
1.1 材料
健康SD大鼠72只,體重200~250g,購自湖南斯萊克景達實驗動物有限公司(SCXK湘20090004)。牛磺膽酸鈉(95%),購自美國Sigma公司,TNFα試劑盒購自北京晶美生物工程公司,IL6檢測試劑盒購自奧地利Bender Medsystems公司,髓過氧化物酶(MPO)檢測試劑盒購于南京建成有限公司,羅格列酮購于天津葛蘭素史克公司。
1.2 實驗分組
72只SD大鼠隨機分為3組:SAP組24只,以0.1mL/min的速度向胰膽管內逆行注入5% 牛磺膽酸鈉(0.1mL/100 g)建立大鼠SAP模型;羅格列酮處理組24只,于模型制作前30min腹腔內注射羅格列酮(10mg/kg)進行預處理;假手術組24只,開腹后僅翻動胰腺即關腹。各組分別于術后3h、6h和12h腹主動脈抽血(各組每時點8只),分離血漿保存于-20℃中備測,將大鼠處死,留取胰腺組織并分為兩部分,一部分用于光鏡組織病理學檢查,另一部分胰腺組織迅速置液氮中保存,用于檢測胰腺組織MPO。
1.3 觀測指標和實驗方法
血漿淀粉酶(AMY)采用全自動生化分析儀檢測,血漿TNFα、IL6采用ELISA方法檢測,嚴格按試劑盒說明進行操作。胰腺組織MPO檢測采用酶化學法測定,以每克組織濕片在37℃的反應體系中H2O2被分解1μmol為1個酶活力單位,MPO (單位/克濕片)=[測定管吸光
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