http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Cephalosporolides H and I, Two Novel Lactones from a Marine-Derived Fungus, Penicillium sp.
Yao, Yanhua,Zheng, Yinan,Sattler, Isabel,Lin, Wenhan,Li, Xiang 대한약학회 2007 Archives of Pharmacal Research Vol.30 No.7
Two novel lactones, Cephalosporolides H (1) and I (2), were isolated from the lyophilized culture broth of the marine-derived fungus, Penicillium sp. The structures were elucidated on the basis of extensive 1D- and 2D-NMR, as well as HRESI-MS spectroscopic analyses. The relative stereochemistries of the compounds were assessed by comparison of the NOESY analysis and spectral data with those in the literature.
Assessment of the Cytotoxic and Apoptotic Effects of Chaetominine in a Human Leukemia Cell Line
Yao, Jingyun,Jiao, Ruihua,Liu, Changqing,Zhang, Yupeng,Yu, Wanguo,Lu, Yanhua,Tan, Renxiang The Korean Society of Applied Pharmacology 2016 Biomolecules & Therapeutics(구 응용약물학회지) Vol.24 No.2
Chaetominine is a quinazoline alkaloid originating from the endophytic fungus Aspergillus fumigatus CY018. In this study, we showed evidence that chaetominine has cytotoxic and apoptotic effects on human leukemia K562 cells and investigated the pathway involved in chaetominine-induced apoptosis in detail. Chaetominine inhibited K562 cell growth, with an $IC_{50}$ value of 35 nM, but showed little inhibitory effect on the growth of human peripheral blood mononuclear cells. The high apoptosis rates, morphological apoptotic features, and DNA fragmentation caused by chaetominine indicated that the cytotoxicity was partially caused by its pro-apoptotic effect. Under chaetominine treatment, the Bax/Bcl-2 ratio was upregulated (from 0.3 to 8), which was followed by a decrease in mitochondrial membrane potential, release of cytochrome c from mitochondria into the cytosol, and stimulation of Apaf-1. Furthermore, activation of caspase-9 and caspase-3, which are the main executers of the apoptotic process, was observed. These results demonstrated that chaetominine induced cell apoptosis via the mitochondrial pathway. Chaetominine inhibited K562 cell growth and induced apoptotic cell death through the intrinsic pathway, which suggests that chaetominine might be a promising therapeutic for leukemia.
Yao Lin,Li Fengling,Wang Lianzhu,Zhai Yuxiu,Jiang Yanhua 한국미생물학회 2014 The journal of microbiology Vol.52 No.11
VP2 is the minor structural protein of noroviruses (NoV)and may function in NoV particle stability. To determinethe function of VP2 in the stability of the NoV particle, weconstructed and purified two kinds of virus-like particles(VLPs), namely, VLPs (VP1) and VLPs (VP1+VP2), fromSf9 cells infected with recombinant baculoviruses by usinga Bac-to-Bac® baculovirus expression system. The two kindsof VLPs were treated with different phosphate buffers (pH2 to pH 8); the secondary structure was then analyzed byfar UV circular dichroism (CD) spectroscopy. Results showedthat significant disruptions of the secondary structure ofproteins were not observed at pH 2 to pH 7. At pH 8, thepercentages of α-helix, β-sheet, and β-turn in VLPs (VP1)were decreased from 11% to 8%, from 37% to 32%, andfrom 20% to 16%, respectively. The percentage of coil wasincreased from 32% to 44%. By contrast, the percentages ofα-helix, β-sheet, and β-turn in VLPs (VP1+VP2) were decreasedfrom 11% to 10%, from 37% to 35%, and from 20%to 19%, respectively. The percentage of coil was increasedfrom 32% to 36%. VLPs (VP1+VP2) was likely more stablethan VLPs (VP1), as indicated by the percentage of the secondarystructures analyzed by CD. These results suggestedthat VP2 could stabilize the secondary structure of VLPsunder alkaline pH conditions. This study provided novelinsights into the molecular mechanism of the function ofVP2 in the stability of NoV particles.
Cephalosporolides H and I, Two Novel Lactones from a Marine-Derived Fungus, Penicillium sp.
Xiang Li,Yanhua Yao,Yinan Zheng,Isabel Sattler,Wenhan Lin 대한약학회 2007 Archives of Pharmacal Research Vol.30 No.7
Two novel lactones, Cephalosporolides H (1) and I (2), were isolated from the lyophilized culture broth of the marine-derived fungus, Penicillium sp. The structures were elucidated on the basis of extensive 1D- and 2D-NMR, as well as HRESI-MS spectroscopic analyses. The relative stereochemistries of the compounds were assessed by comparison of the NOESY analysis and spectral data with those in the literature.
Yuxiu Zhai,Hui Zhang,Lin Yao,Yanhua Jiang,Fengling Li 한국유전학회 2016 Genes & Genomics Vol.38 No.5
Chlamys farreri is an important economic mollusk and is able to accumulate cadmium (Cd) excessively. Two cDNA libraries from gill of C. farreri which were Cd treated or not were generated based on the Illumina sequencing platform in order to identify differentially expressed genes (DEGs) associated with cadmium accumulation. The analysis of comparative transcriptomics identified 82,800 unigenes and 128 differentially expressed genes. Of these, 8 of the most significant DEGs were verified by real-time PCR, showing consistent trends in expression patterns between the two techniques. KEGG pathways analysis revealed that 37 associated processes were highly enriched. A set of key DEGs were identified that may play important roles in cadmium exposure. Our work presents an overview of gene expression change during cadmium exposure to C. farreri and identifies a series of candidate genes and pathways for further research on the molecular mechanisms of cadmium accumulation.
A novel pathogenic deletion in ISPD causes Walker-Warburg syndrome in a Chinese family
Shi Yuting,Fu Yimei,Tao Zhouteng,Yong Wenjing,Peng Huirong,Jian Wenyang,Chen Gang,Guo Manhui,Zhao Yanhua,Yao Ruojin,Guo Dewei 한국유전학회 2023 Genes & Genomics Vol.45 No.3
Background Walker-Warburg syndrome (WWS) is a genetically heterogeneous disease that often presents with complex brain and eye malformations and congenital muscular dystrophy. Mutations of the ISPD gene have been identified as one of the most frequent causes of WWS. Objective The current study aimed to identify the cause of severe congenital hydrocephalus and brain dysplasia in our subject. Methods Genomic DNA was extracted from the fetus's umbilical cord blood and peripheral venous blood of the parents. The genetic analysis included whole-exome sequencing and qPCR. Additionally, in silico analysis and cellular experiments were performed. Results We identified a novel homozygous deletion of exons 7 to 9 in the ISPD gene of the fetus with WWS. In silico analysis revealed a defective domain structure in the C-terminus domain of the ISPD. Analysis of the electrostatic potential energy showed the formation of a new binding pocket formation on the surface of the mutant ISPD gene (ISPD-del ex7-9). Cellular study of the mutant ISPD revealed a significant change in its cellular localization, with the ISPD-del ex7-9 protein translocating from the cytoplasm to the nucleus compared to wild-type ISPD, which is mostly present in the cytoplasm. Conclusion The present study expands the mutational spectrum of WWS caused by ISPD mutations. Importantly, our work suggests that whole-exome sequencing could be considered as a diagnostic option for fetuses with congenital hydrocephalus and brain malformations when karyotype or chromosomal microarray analysis fails to provide a definitive diagnosis.