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Rong Ding,Xin-Sheng Yao,Jinshan Tang,Hao Gao,Ting Li,Hua Zhou,Liang Liu 대한약학회 2012 Archives of Pharmacal Research Vol.35 No.9
Two new methymycin derivatives, 3'-demethylmethymycin (1) and 3'-demethyldeoxymethymycin (2), together with seven known ones (3-9), were obtained from the strain Streptomyces venezuelae ATCC 15439. Their structures were determined on the basis of IR, MS, 1D and 2D NMR data. In addition, the inhibitory effects of all the compounds on human T cell proliferation mediated by PMA/ionomycin were evaluated. The data suggested for the first time that methymycin derivatives have potential anti-inflammatory activity.
Characterization and profiling of MicroRNAs in posterior silk gland of the silkworm (Bombyx mori)
Fei Song,Xin Wang,Chen Chen,Yangyang Fan,Shunming Tang,Jinshan Huang,Xijie Guo,Xingjia Shen 한국유전학회 2015 Genes & Genomics Vol.37 No.8
MicroRNAs (miRNAs) regulate expression of genes at post-transcriptional level by binding on complementary sequences of target mRNAs and play multiple roles in biological processes. To investigate the differential expression of miRNAs in posterior silk gland (PSG) of silkworm (Bombyx mori) in different periods and regulation of miRNAs on the expression of fibroin genes, Solexa sequencing technology was used to detect miRNAs in PSGs of fourth-instar day-2 larvae and fifth-instar day-3 larvae, respectively. As a result, 466 previously reported miRNAs, and 35 novel miRNAs were detected, and 499 of these detected miRNAs are predicted to target 13,383 genes by target prediction softwares. Additionally, 29 miRNAs expressed differently between the PSG of fourthinstar day-2 larvae and fifth-instar day-3 larvae were found, and the differential expression of these miRNAs may play an important role in the expression of fibroin genes.
Low METTL3 level in midgut of the Bombyx mori inhibit the proliferation of nucleopolyhedrovirus
Xue Peng,Jiangtao Zhai,Zhu Juan,Wang Meixian,Zhao Qiaoling,Huang Jinshan,Tang Shunming,Shen Xingjia 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.1
N6-methyladeosine (m 6 A) plays an important role in virus infection and replication. Bombyx mori nuclear polyhedrosis is caused by Bombyx mori nucleopolyhedrovirus (BmNPV) infection. Expression levels of m 6 Amodification-related genes after the infection of BmNPV were detected at first. Then, expression levels of BmNPV nucleocapsid protein gene VP39 and envelope fusion protein gene GP64 after knockdown of METTL3in vitro were quantified to identify the effect of m 6 A modification on BmNPV. BmNPV firstly infects the larval midgut in case of oral infection. Subsequently, to clarify the relationship between m 6 A modification and resistance of the silkworm to BmNPV, we detected the expression levels of m 6 A-modification-related genes invivo before and after infection of BmNPV. The results indicated that low METTL3 level hindered the proliferation of BmNPV to some extent, and silkworm strain with low METTL3 level showed stronger resistance against BmNPV. This study will accumulate new experimental data for elucidating the resistance mechanism of silkworm against BmNPV.