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CDDO-9,11-二氢-三氟乙酰胺(CDDO-dhTFEA)可诱导大鼠肝脏中的细胞保护基因并增加胆汁流量。

CDDO-9,11-dihydro-trifluoroethyl amide (CDDO-dhTFEA) induces hepatic cytoprotective genes and increases bile flow in rats.

作者信息

Reisman Scott A, Ward Keith W, Klaassen Curtis D, Meyer Colin J

机构信息

Reata Pharmaceuticals, Inc., Irving, TX 75063, USA.

出版信息

Xenobiotica. 2013 Jul;43(7):571-8. doi: 10.3109/00498254.2012.750022. Epub 2012 Dec 17.

Abstract
  1. The transcription factor Nrf2 is important for hepatoprotection against oxidative stress, as it regulates many cytoprotective genes, including several important for glutathione (GSH) homeostasis. In addition to being an important endogenous antioxidant, GSH is also critical for the maintenance of bile acid-independent bile flow. While it has been well-established that synthetic oleanane triterpenoids pharmacologically activate Nrf2, their effects on bile flow and hepatic cytoprotective capacity have not been fully explored. 2. The present studies were conducted to evaluate the effects of a compound in this class, CDDO-9,11-dihydro-trifluoroethyl amide (CDDO-dhTFEA), on these parameters. CDDO-dhTFEA at 3, 10 or 30 mg/kg was orally administered to bile duct-cannulated rats once daily for 7 days, with bile collected 5 h after each dose for 1 h. Livers were harvested after the final bile collection for the evaluation of histology and Nrf2 targets. 3. CDDO-dhTFEA did not affect liver histology. CDDO-dhTFEA markedly and dose-dependently increased bile flow, as well as the biliary excretion of GSH, cholesterol and phospholipids without affecting biliary excretion of bile acids. This was accompanied by dose-dependent increases in mRNA expression and/or enzyme activity of a broad panel of cytoprotective Nrf2 target genes, including NAD(P)H quinone oxidoreductase 1 (Nqo1), thioredoxin reductase (Txnrd), sulfiredoxin 1(Srxn1), glutamate cysteine ligase catalytic and modifier subunits (Gclc and Gclm), glutathione reductase (Gsr), gamma-glutamyl transpeptidase 1 (Ggt1), heme oxygenase-1 (Ho-1) and epoxide hydrolase-1 (Eh-1). 4. These data further demonstrate the important hepatobiliary attributes of oleanane synthetic triterpenoids and support their continued investigation for liver diseases.
摘要
  1. 转录因子Nrf2对肝脏抵抗氧化应激具有重要作用,因为它能调控许多细胞保护基因,包括对谷胱甘肽(GSH)稳态至关重要的几个基因。GSH除了是一种重要的内源性抗氧化剂外,对维持不依赖胆汁酸的胆汁流动也至关重要。虽然合成齐墩果烷三萜类化合物在药理上激活Nrf2这一点已得到充分证实,但其对胆汁流动和肝细胞保护能力的影响尚未得到充分研究。2. 本研究旨在评估该类化合物CDDO-9,11-二氢-三氟乙酰胺(CDDO-dhTFEA)对这些参数的影响。将3、10或30mg/kg的CDDO-dhTFEA每日一次口服给予胆管插管大鼠,持续7天,每次给药后5小时收集胆汁1小时。在最后一次胆汁收集后摘取肝脏,用于组织学和Nrf2靶点评估。3. CDDO-dhTFEA不影响肝脏组织学。CDDO-dhTFEA显著且剂量依赖性地增加胆汁流动,以及GSH、胆固醇和磷脂的胆汁排泄,而不影响胆汁酸的胆汁排泄。这伴随着一系列细胞保护Nrf2靶基因的mRNA表达和/或酶活性的剂量依赖性增加,包括NAD(P)H醌氧化还原酶1(Nqo1)、硫氧还蛋白还原酶(Txnrd)、硫氧还蛋白还原酶1(Srxn1)、谷氨酸半胱氨酸连接酶催化和调节亚基(Gclc和Gclm)、谷胱甘肽还原酶(Gsr)、γ-谷氨酰转肽酶1(Ggt1)、血红素加氧酶-1(Ho-1)和环氧化物水解酶-1(Eh-1)。4. 这些数据进一步证明了齐墩果烷合成三萜类化合物重要的肝胆特性,并支持对其在肝脏疾病方面的持续研究。

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