C42属于epipolythiodioxopiperazines(ETPs)二酮呱嗪类化合物,具有多种生物学活性,包括抑制病毒复制;不过其对hepatitis B virus(HBV)复制的影响及机理鲜有报道。自噬是广泛存在于真核细胞、通过溶酶体降解长半衰期蛋白的现象,参与多种...C42属于epipolythiodioxopiperazines(ETPs)二酮呱嗪类化合物,具有多种生物学活性,包括抑制病毒复制;不过其对hepatitis B virus(HBV)复制的影响及机理鲜有报道。自噬是广泛存在于真核细胞、通过溶酶体降解长半衰期蛋白的现象,参与多种生理、病理过程。有研究发现自噬对HBV的复制至关重要。C42是否通过改变自噬来影响此病毒的复制目前还未见报道。在该研究中,我们发现表达HBV基因组的Hep G2.215细胞较原始的Hep G2细胞,自噬体明显增加并伴随着Akt磷酸化的增高。C42可以降低自噬基因LC3-II和p62的水平,同时会影响Akt信号通路。氯喹是一种自噬抑制剂,它的存在可以抑制C42导致的LC3-II降低,表明C42可以引起该细胞的自噬。敲降自噬基因和抑制Akt磷酸化均可以减少HBV-X蛋白表达。而利用氯喹抑制自噬体与溶酶体的融合却提高了HBV-X蛋白水平。由于HBV-X对该病毒的复制至关重要,因此,我们认为,C42通过自噬和Akt信号通路来抑制HBV的复制。展开更多
A new epipolythiodioxopiperazine (ETP), asperterzine (1), along with two known analogs, bisdethiobis (methylthio)-acetylaranotin (2) and bisdethiobis(methylthio)-acetylapoaranotin (3), was isolated from th...A new epipolythiodioxopiperazine (ETP), asperterzine (1), along with two known analogs, bisdethiobis (methylthio)-acetylaranotin (2) and bisdethiobis(methylthio)-acetylapoaranotin (3), was isolated from the plant endophytic fungus Aspergillus terreus PR-P-2. The structure elucidation of 1 was accomplished by a combination of spectral methods and electronic circular dichroism (ECD) spectrum. Asperterzine (1) was a symmetric aromatized ETP found as a natural product for the first time. Compounds 2 and 3 showed strong cytotoxicity against HL-60 cell line. The putative biosynthetic pathway of 1 was also detailed in the text.展开更多
文摘C42属于epipolythiodioxopiperazines(ETPs)二酮呱嗪类化合物,具有多种生物学活性,包括抑制病毒复制;不过其对hepatitis B virus(HBV)复制的影响及机理鲜有报道。自噬是广泛存在于真核细胞、通过溶酶体降解长半衰期蛋白的现象,参与多种生理、病理过程。有研究发现自噬对HBV的复制至关重要。C42是否通过改变自噬来影响此病毒的复制目前还未见报道。在该研究中,我们发现表达HBV基因组的Hep G2.215细胞较原始的Hep G2细胞,自噬体明显增加并伴随着Akt磷酸化的增高。C42可以降低自噬基因LC3-II和p62的水平,同时会影响Akt信号通路。氯喹是一种自噬抑制剂,它的存在可以抑制C42导致的LC3-II降低,表明C42可以引起该细胞的自噬。敲降自噬基因和抑制Akt磷酸化均可以减少HBV-X蛋白表达。而利用氯喹抑制自噬体与溶酶体的融合却提高了HBV-X蛋白水平。由于HBV-X对该病毒的复制至关重要,因此,我们认为,C42通过自噬和Akt信号通路来抑制HBV的复制。
基金supported by the Fund of Natural Science of Liaoning Province(No. 2015020730)supported by Program for Innovative Research Team of the Ministry of EducationProgram for Liaoning Innovative Research Team in University
文摘A new epipolythiodioxopiperazine (ETP), asperterzine (1), along with two known analogs, bisdethiobis (methylthio)-acetylaranotin (2) and bisdethiobis(methylthio)-acetylapoaranotin (3), was isolated from the plant endophytic fungus Aspergillus terreus PR-P-2. The structure elucidation of 1 was accomplished by a combination of spectral methods and electronic circular dichroism (ECD) spectrum. Asperterzine (1) was a symmetric aromatized ETP found as a natural product for the first time. Compounds 2 and 3 showed strong cytotoxicity against HL-60 cell line. The putative biosynthetic pathway of 1 was also detailed in the text.