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奥利万星中间体A82846B产生菌拟孢囊菌CCTCC M2020063全基因组序列分析与mbtH类基因的验证 被引量:1
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作者 程雯 蒲桂洪 +1 位作者 牛国清 邹祥 《微生物学报》 CAS CSCD 北大核心 2021年第12期3977-3990,共14页
【目的】分析荒漠拟孢囊菌CCTCC M2020063中A82846B合成的代谢途径和关键基因。【方法】使用Illumina二代测序和PacBio三代测序技术对荒漠拟孢囊菌CCTCC M2020063进行全基因组测序,利用Glimmer预测编码序列,使用HPLC和LCMS鉴定次级代谢... 【目的】分析荒漠拟孢囊菌CCTCC M2020063中A82846B合成的代谢途径和关键基因。【方法】使用Illumina二代测序和PacBio三代测序技术对荒漠拟孢囊菌CCTCC M2020063进行全基因组测序,利用Glimmer预测编码序列,使用HPLC和LCMS鉴定次级代谢产物,使用antiSMASH 5.0软件预测次级代谢产物合成基因簇。利用Geneious软件对A82846B合成相关基因进行分析,对其中的mbtH类基因着重分析。【结果】本实验菌株鉴定为荒漠拟孢囊菌(Kibdelosporangium aridum),基因组中有一条线性染色体,无质粒,序列全长12475688 bp,GC含量为66.27%,有11900个开放阅读框,共有47个基因簇。该菌株具有合成A82846B的能力,且生物合成相关基因位于Cluster32,包含33个基因,mbtH类基因gene07864的过表达促进A82846的合成,提升了26.42%,卤化酶基因为gene07859,与万古霉素、巴利霉素的卤化酶相似度较高。【结论】本研究对荒漠拟孢囊菌CCTCC M2020063进行了基因组序列分析,获得了A82846B生物合成相关的功能基因信息,为A82846B的代谢途径和工程改造提供了强有力的基础。 展开更多
关键词 荒漠拟孢囊 奥利万星 A82846B 全基因组组装 mbtH类基因 卤化酶基因
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拟孢囊菌属放线菌的研究进展 被引量:3
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作者 熊有威 蒋继宏 秦盛 《微生物学报》 CAS CSCD 北大核心 2019年第5期799-808,共10页
拟孢囊菌属(Kibdelosporangium)是一个经典的丝状放线菌类群。自Shearer等于1986年建立该属以来,不断有新的菌株从不同生境中被纯培养分离得到,目前已有效发表8个种、2个亚种。拟孢囊菌属作为稀有放线菌属,是获得新型抗生素类次生代谢... 拟孢囊菌属(Kibdelosporangium)是一个经典的丝状放线菌类群。自Shearer等于1986年建立该属以来,不断有新的菌株从不同生境中被纯培养分离得到,目前已有效发表8个种、2个亚种。拟孢囊菌属作为稀有放线菌属,是获得新型抗生素类次生代谢产物的重要资源。本文结合我们分离到的一株该属菌株的功能研究、基因组分析和相关文献资料,系统综述了拟孢囊菌属放线菌的建立、分类学特征、属内种的分布、活性次级代谢产物的发现以及其他功能应用和开发前景,以期为该属其他新分离菌株的分类鉴定、新颖次级代谢产物的发现、功能基因资源的挖掘与开发提供借鉴。 展开更多
关键词 拟孢囊菌属 分类 代谢产物 应用
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一株红树林来源稀有放线菌的鉴定和抑菌活性物质的初步研究
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作者 张骏梁 张诗玲 +3 位作者 吴佳慧 许姗姗 梁锦有 徐颖 《食品与发酵工业》 CAS CSCD 北大核心 2021年第8期101-107,共7页
对分离自香港米埔红树林放线菌XY-R10进行鉴定并研究其抑菌活性。采用R2A和ISP-2培养基分离和纯化菌株。通过PCR扩增和测序获得菌株16S rRNA序列,利用邻接法构建系统发育树并结合形态学分析,初步鉴定该菌可能为拟孢囊菌属的Kibdelospora... 对分离自香港米埔红树林放线菌XY-R10进行鉴定并研究其抑菌活性。采用R2A和ISP-2培养基分离和纯化菌株。通过PCR扩增和测序获得菌株16S rRNA序列,利用邻接法构建系统发育树并结合形态学分析,初步鉴定该菌可能为拟孢囊菌属的Kibdelosporangium phytohabitans。通过纸片扩散法和微量稀释法研究发酵粗提物的抑菌活性,发现其具有广谱抗革兰氏阳性菌作用。初步分离发现粗提物中可能存在多个活性成分,结合液相-串联高分辨质谱分析,鉴定出活性成分Maipomycin A,它对表皮葡萄球菌、单增李斯特菌和副溶血弧菌有抑菌活性。该文为挖掘红树林微生物资源、抗菌药物的开发,以及食品工业寻找新的抑菌防腐物质提供了研究基础。 展开更多
关键词 红树林微生物 稀有放线菌 拟孢囊菌属 抑菌活性
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Laparoscopic cystogastrostomy for the treatment of pancreatic pseudocysts: A case report 被引量:16
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作者 Qin-song Sheng Da-Zhi Chen Ren Lang Zhong-Kui Jin Dong-Dong Han Li-Xin Li Yong-Jiu Yang Ping Li Fei Pan Dong Zhang Zhao-Wei Qu Qiang He 《World Journal of Gastroenterology》 SCIE CAS CSCD 2008年第30期4841-4843,共3页
Pancreatic pseudocysts (PPs) are collections of pancreatic secretions that are lined by fibrous tissues and may contain necrotic debris or blood. The interventions including percutaneous, endoscopic or surgical appr... Pancreatic pseudocysts (PPs) are collections of pancreatic secretions that are lined by fibrous tissues and may contain necrotic debris or blood. The interventions including percutaneous, endoscopic or surgical approaches are based on the size, location, symptoms and complications of a pseudocyst. With the availability of advanced imaging systems and cameras, better hemostatic equipments and excellent laparoscopic techniques, most pseudocysts can be found and managed by laparoscopy. We describe a case of a 30-year-old male patient with a pancreatic pseudocyst amenable to laparoscopic cystogastrostomy. An incision was made through the anterior gastric wall to expose the posterior gastric wall in close contact with the pseudocyst using an ultrasonically activated scalpel. Then, another incision was made for cystogastrostomy to obtain complete and unobstructed drainage. The patient recovered well after operation and was symptom-free during a 6-mo follow-up, suggesting that laparoscopic cystogastrostomy is a safe and effective alternative to open cystogastrostomy for minimally invasive management of PPs. 展开更多
关键词 Pancreatic pseudocyst Laparoscopic cystogastrostomy Percutaneous drainage Endoscopic drainage LAPAROSCOPY PANCREATITIS
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Treatment of pancreatic pseu do cysts in line with D'Egidio's classification 被引量:3
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作者 Ai-BinZhang Shu-SenZheng 《World Journal of Gastroenterology》 SCIE CAS CSCD 2005年第5期729-732,共4页
AIM: To explore the implications of underlying diseases in treatment of pancreatic pseudocysts (PPC). METHODS: Clinical data of 73 cases of pancreatic pseudocyst treated in a 12-year period were reviewed comprehensive... AIM: To explore the implications of underlying diseases in treatment of pancreatic pseudocysts (PPC). METHODS: Clinical data of 73 cases of pancreatic pseudocyst treated in a 12-year period were reviewed comprehensively. Pancreatic pseudocysts were classified according to the etiological criteria proposed by D'Egidio. The correlation between the etiological classification, measure of treatment and clinical outcome of the patients was analyzed. RESULTS: According to the etiological criteria proposed by D'Egidio, 73 patients were divided into three groups. Group I was comprised of 37 patients with type I pseudocyst, percutaneous drainage was successful in the majority (9/11, 82%) while external or internal drainage was not satisfactory with a low success rate (8/16, 50%). Group II was comprised of 24 patients with type II pseudocyst, and internal drainage was curative for most of the cases (11/12, 92%), but the success rate of percutaneous or external drainage was unacceptably low (4/9, 44%). Group III consisted of 12 patients with type III pseudocyst. Internal drainage or pancreatic resection performed in 10 of these patients produced a curative rate of 80% (8/10) with the correction of the ductal pathology as a prerequisite. CONCLUSION: The classification of pancreatic pseudocyst based on its underlying diseases is meaningful for its management. Awareness of the underlying diseases of pancreatic pseudocyst and detection of the ductal pathology in type II and III pancreatic pseudocysts with endoscopic retrograde cholangiopancreatography may help make better decisions of treatment to reduce the rate of complications and recurrence. 展开更多
关键词 Pancreatic pseudocysts D'Egidio's classification
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A rare presentation of appendiceal diverticulitis associated with pelvic pseudocyst
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作者 Hirotaka Niwa Takeyuki Hiramatsu 《World Journal of Gastroenterology》 SCIE CAS CSCD 2008年第8期1293-1295,共3页
We report a case of a 32-year-old woman with episodic right lower quadrant abdominal pain. With the diagnosis of either acute appendicitis or tubo-ovarian abscess, she was treated with antibiotics, which successfully ... We report a case of a 32-year-old woman with episodic right lower quadrant abdominal pain. With the diagnosis of either acute appendicitis or tubo-ovarian abscess, she was treated with antibiotics, which successfully relieved the pain and the inflammatory findings. She repeated the clinical condition a few times and antibiotics worked each time. In a year, her subjective symptoms became milder, however, a giant pelvic cyst appeared. She had an exploratory laparotomy to confirm this diagnosis. Histopathological studies revealed herniated appendiceal mucosa through the muscular layer associated with chronic inflammation and marked fibrosis. Gynecological disorders such as endometriosis or lutein cyst rupture was denied. These findings represent appendiceal diverticulitis. We discuss the clinical features of the disease and its relation with the pelvic pseudocyst. 展开更多
关键词 Appendiceal diverticulitis PERFORATION Pelvic pseudocyst
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