劉昕+薛茹+賈鳳蘭+等
北京大學公共衛生學院毒理學系國家中醫藥管理局中藥配伍減毒重點研究室,北京 100191
[摘要] 目的 探討1,3-二苯-1,3-丙二酮(DPPD)對二甲基亞硝胺(DMN)急性肝損傷的保護作用。 方法 小鼠按體重隨機平均分為五組,分別為對照組、DMN組和三組劑量組。劑量組分別經口灌胃給予小鼠DPPD 100、200、400 mg/kg體重每日1次,連續4 d,然后腹腔注射給予致肝毒性劑量DMN(22 mg/kg體重)。染毒后24 h測定血清丙氨酸氨基轉移酶(ALT)、天冬氨酸氨基轉移酶(AST)和乳酸脫氫酶(LDH)活性;制備肝勻漿,改良Hission法測定肝中還原型谷胱甘肽(GSH)、氧化型谷胱甘肽(GSSG)含量,TBA法測定肝中丙二醛(MDA)含量;HE染色處理肝臟組織切片,光鏡觀察病理學改變。 結果 與單獨給予DMN組相比,給予DPPD組明顯改善了DMN引起體重降低的現象,DMN+DPPD高劑量組[(24.3±1.5)g]與DMN組[(22.7±1.0)g]相比,差異有統計學意義(P < 0.05);并且顯著降低血清中ALT、AST、LDH含量,DMN+DPPD高劑量組[ALT:(151±38)U/L,AST:(216±131)U/L,LDH:(1423±813)U/L]與DMN組相比[ALT:(1481±575) U/L,AST:(1155±559) U/L,LDH:(3196±784) U/L],差異有高度統計學意義(P < 0.01)。相比單獨給予DMN組,給予DPPD組肝臟病理損傷明顯改善,并呈一定的劑量效應關系。進一步研究表明,預防性給予DPPD各組可改善DMN引起的肝脂質過氧化現象,且相比單獨給予DMN組,給予DPPD組的GSH/GSSG比值顯著增加, DMN+DPPD高劑量組(10.734±0.572)與 DMN組(6.873±0.587)相比,差異有高度統計學意義(P < 0.01)。 結論 DPPD可有效抵抗DMN對ICR小鼠肝臟造成的毒性損傷,調動機體抗氧化應激系統為可能的機制。
[關鍵詞] 1,3-二苯-1,3-丙二酮;二甲基亞硝胺;急性肝損傷;小鼠;保肝作用
[中圖分類號] R285.5 [文獻標識碼] A [文章編號] 1673-7210(2014)03(b)-0023-05
Protective effects of 1, 3- diphenyl-1, 3- propanedione on Dimethylnitrosamine-induced liver injury in mice
LIU Xin XUE Ru JIA Fenglan RUAN Ming ZHANG Baoxu
Key laboratory of State Administration of Traditional Chinese Medicine, Department of Toxicology, School of Public Health, Peking University Health Science Center, Beijing 100191, China
[Abstract] Objective To examine the protective effects of 1, 3-diphenyl-1, 3-proanedione (DPPD) on Dimethylnitrosamine (DMN)-induced hepatotoxicity on ICR mice. Methods Mice were randomly divided into 5 groups as follows: control group, DMN group and three dosage groups. Three dosage groups administered in intragastrically with DPPD at doses of 100, 200 and 400 mg/kg body weight respectively for 4 d. 24 hours after DMN injection (22 mg/kg body weight), the serum enzyme including alanine aminotransferase (ALT), aspartate aminotransferase (AST), lactate dehydrogenase (LDH) were measured. The content of reduced glutathione (GSH) and oxidized glutathione (GSSG) were examined by Hisssion method, and the content of malondialdehyde (MDA) was examined by TBA method. Histopathological analysis were also made to observe the pathological chagne. Results Compared with DMN group, DPPD administration restored the body weight to normal, the difference between the DMN+DPPD highest dose group [(24.3±1.5) g] and DMN group [(22.7±1.0) g] was statistically significant (P < 0.05); and significantly decreased the serum of ALT, AST and LDH, the differences between the DMN+DPPD highest dose group [ALT: (151±38) U/L, AST: (216±131) U/L, LDH: (1423±813) U/L] and DMN group [ALT: (1481±575) U/L, AST: (1155±559) U/L, LDH: (3196±784) U/L] were statistically significant (P < 0.01). Liver histopathological examination showed that DPPD administration antagonized DMN-induced liver pathological damage in a dose-dependent manner. Further tests showed that DPPD significantly reduced the hepatic lipid peroxidation induced by DMN, and the ratio of GSH/GSSG was induced significantly by DPPD to antagonize DMN-induced hepatotoxicity, the difference between the DMN+DPPD highest dose group (10.734±0.572) and DMN group (6.873±0.587) was statistically significant (P < 0.05). Conclusion DPPD can effectively protect ICR male mice from DMN-induced hepatotoxicity. Reduction of oxidative stress may be part of the protection mechanism.
[Key words] 1, 3-diphenyl-1, 3-propanedione; Dimethylnitrosamine; Acute liver injury; Mice; Hepatoprotection
1,3-二苯-1,3-丙二酮(DPPD)是從甘草根中提取所得的一種β-二酮類物質。根據目前所得的研究結果,甘草根本身具有肝臟保護作用,并且已經在臨床應用試驗中獲得了成功[1]?!?br>