Rapid differential identification of Mycobacterium species is essential for effective diagnosis and management of mycobacteriosis. The aim of this study was to develop a novel multiplex probe array based on the 16S-23...Rapid differential identification of Mycobacterium species is essential for effective diagnosis and management of mycobacteriosis. The aim of this study was to develop a novel multiplex probe array based on the 16S-23S rRNA gene internal transcribed spacer sequence for the genotyping of mycobacteria to the species level. A pair of primers and a set of genus- and species-specific probes were designed from the conserved and polymorphic regions of the 16S rRNA gene, internal transcribed spacer, and 23S rRNA gene sequences of mycobacteria. We used a novel multiplex probe array for identification of 266 clinical specimens obtained from patients with mycobaterial infection. The results showed that the overall specificity and sensitivity of our novel probe array were both 100% for the genus-specific probe and Mycobacterium tuberculosis complex- specific probe. There were 79.3 % （23/29） of nontuberculous mycobacteria which could be identified to the species level directly in the specimens from China. Some intraspecies heterogeneity in M. avium, M. intracellulare, M. chelonae and M. abscessus was observed. With the increase of sequences of internal transcribed spacer and numbers of whole microbial genomes, and further optimization of probes, the multiplex probe army will become a promising tool for the rapid and accurate identification of mycobacteria in ordinary clinical laboratories.展开更多
目的:检测miR23b和特异蛋白1(specific protein 1,Sp1)在卵巢子宫内膜异位症中的表达和分布情况,探讨二者在卵巢子宫内膜异位症发生发展中的作用及意义。方法:qPCR检测miR23b和Sp1 mRNA在异位内膜、在位内膜、正常内膜中的表达水平;免...目的:检测miR23b和特异蛋白1(specific protein 1,Sp1)在卵巢子宫内膜异位症中的表达和分布情况,探讨二者在卵巢子宫内膜异位症发生发展中的作用及意义。方法:qPCR检测miR23b和Sp1 mRNA在异位内膜、在位内膜、正常内膜中的表达水平;免疫组织化学和Western印迹检测Sp1蛋白在异位内膜、在位内膜、正常内膜的表达和分布情况。结果:MiR23b mRNA在异位内膜、在位内膜、正常内膜组中的表达水平依次增加(P<0.05)。Sp1在子宫内膜间质细胞、腺上皮细胞中均有表达,主要表达在细胞核,少量表达在胞质中;Sp1 mRNA和蛋白在异位内膜、在位内膜、正常内膜中的表达均依次降低(P<0.05)。MiR23b与Sp1 mRNA表达呈负相关(r=–0.526,P<0.05)。结论:MiR23b和Sp1与卵巢子宫内膜异位症的发生发展密切相关,二者可能通过相互拮抗,共同参与异位病灶的形成。展开更多
From the marine sponge Jaspis sp., a new isomalabaricane triterpenoid 22, 23- dihydrostellettin D (1) was isolated, and its structure was established on the basis of IR, MS and extensive 2D NMR spectroscopic analysis....From the marine sponge Jaspis sp., a new isomalabaricane triterpenoid 22, 23- dihydrostellettin D (1) was isolated, and its structure was established on the basis of IR, MS and extensive 2D NMR spectroscopic analysis. It is a unique skeleton compound rarely obtained from Chinese marine organisms.展开更多
Three new drimane sesquiterpenoids(1–3)together with the known 2a-hydroxyisodrimeninol(4),and a new isochromone derivative(5),were obtained from the solid cultures of fungal strain Pestalotiopsis sp.M-23,an endophyti...Three new drimane sesquiterpenoids(1–3)together with the known 2a-hydroxyisodrimeninol(4),and a new isochromone derivative(5),were obtained from the solid cultures of fungal strain Pestalotiopsis sp.M-23,an endophytic fungus isolated from the leaves of Leucosceptrum canum(Labiatae).Their structures were determined by comprehensive 1D and 2D NMR,and MS analyses.The metabolites were evaluated for their antibacterial activities,and compound 3 showed weak inhibitory activity against Bacillus subtilis.展开更多
文摘Rapid differential identification of Mycobacterium species is essential for effective diagnosis and management of mycobacteriosis. The aim of this study was to develop a novel multiplex probe array based on the 16S-23S rRNA gene internal transcribed spacer sequence for the genotyping of mycobacteria to the species level. A pair of primers and a set of genus- and species-specific probes were designed from the conserved and polymorphic regions of the 16S rRNA gene, internal transcribed spacer, and 23S rRNA gene sequences of mycobacteria. We used a novel multiplex probe array for identification of 266 clinical specimens obtained from patients with mycobaterial infection. The results showed that the overall specificity and sensitivity of our novel probe array were both 100% for the genus-specific probe and Mycobacterium tuberculosis complex- specific probe. There were 79.3 % （23/29） of nontuberculous mycobacteria which could be identified to the species level directly in the specimens from China. Some intraspecies heterogeneity in M. avium, M. intracellulare, M. chelonae and M. abscessus was observed. With the increase of sequences of internal transcribed spacer and numbers of whole microbial genomes, and further optimization of probes, the multiplex probe army will become a promising tool for the rapid and accurate identification of mycobacteria in ordinary clinical laboratories.
基金The work was supported by grants from National High Technology Development Project(863 project)(No.2001AA620403 and 2002AA217081)NNSFC(30171106,40176038)
文摘From the marine sponge Jaspis sp., a new isomalabaricane triterpenoid 22, 23- dihydrostellettin D (1) was isolated, and its structure was established on the basis of IR, MS and extensive 2D NMR spectroscopic analysis. It is a unique skeleton compound rarely obtained from Chinese marine organisms.
基金This work was supported financially by the National Natural Science Foundation of China(Nos.31525005,U1202263,31570362)the Youth Innovation Promotion association of Chinese Academy of Sciences(awarded to Shi-Hong Luo)+1 种基金the“Western Light”Program of Chinese Academy of Sciences(awarded to Shi-Hong Luo)the“Hundred Talents Program”of the Chinese Academy of Sciences(awarded to Sheng-Hong Li).
文摘Three new drimane sesquiterpenoids(1–3)together with the known 2a-hydroxyisodrimeninol(4),and a new isochromone derivative(5),were obtained from the solid cultures of fungal strain Pestalotiopsis sp.M-23,an endophytic fungus isolated from the leaves of Leucosceptrum canum(Labiatae).Their structures were determined by comprehensive 1D and 2D NMR,and MS analyses.The metabolites were evaluated for their antibacterial activities,and compound 3 showed weak inhibitory activity against Bacillus subtilis.
