■研究泪囊鼻腔吻合术(DCR)失败的患者从泪囊囊中分离出的微生物的宏基因组学。
■对10例DCR失败的连续患者进行了一项前瞻性研究。在修正内窥镜DCR期间获得泪囊样品用于宏基因组分析。在全长泪囊有袋化后,在术中收集样品,并立即在冰上运送到实验室。在DNA提取和文库制备之后,在IlluminaTM平台上进行完整的鸟枪宏基因组测序。使用包装在挤压Metapipelinev1.3.0中的各种软件和使用MetaPhlAn4的基于标记基因的宏基因组系统发育分析进行样品的下游分析。
■在失败的DCR样本中鉴定出的五个主要门包括变形杆菌,Firmicutes,放线菌,拟杆菌,和镰刀菌(图1)。流行的物种包括嗜麦芽窄食单胞菌,君士坦地假单胞菌,肺炎链球菌,伯氏不动杆菌,柠檬酸杆菌koseri,和痤疮镰刀菌(图2)。在确定的其他生物中,很少有来自念珠菌属和甲根瘤菌属。在病毒中,最丰富的是Bean58058病毒。有趣的是,偶尔会出现疟原虫和弓形虫。KEGG(京都基因和基因组百科全书)的功能类别分布数据显示微生物代谢是最涉及的功能,其次是细胞过程。
■这是来自失败的DCR患者的泪囊内容物的第一个完整宏基因组测序。使用类似技术鉴定出的生物体与从原发性获得性鼻泪管阻塞(PANDO)患者中分离出的生物体有很大差异,并反映了手术不成功的DCR中泪道微生物群的改变。
UNASSIGNED: To study the metagenomics of the microbes isolated from the
lacrimal sac in patients with failed dacryocystorhinostomy (DCR).
UNASSIGNED: A prospective study was performed on 10 consecutive patients with failed DCR.
Lacrimal sac samples were obtained for metagenomic analysis during the revision endoscopic DCR. The samples were collected intraoperatively after a full-length
lacrimal sac marsupialization and immediately transported on ice to the laboratory. A whole shotgun metagenome sequencing was performed on the IlluminaTM platform following DNA extraction and library preparation. The downstream analysis of the samples was performed using various software packaged in the Squeeze Metapipeline v1.3.0 and marker gene-based metagenomic phylogenetic analysis using MetaPhlAn4.
UNASSIGNED: The five major phyla identified across the samples of failed DCR include Proteobacteria, Firmicutes, Actinobacteria, Bacteroidetes, and Fusobacteria (Figure 1). The prevalent species include Stenotrophomonas maltophilia, Pseudomonas juntendi, Streptococcus pneumoniae, Acinetobacter ursingii, Citrobacter koseri, and Cutibacterium acnes (Figure 2). Among the other organisms identified, few were from genera candida and mezorhizobium. Among the viruses, the most abundant was the BeAn 58058 virus. It was interesting to note the occasional presence of plasmodium and toxoplasma species. The functional category distribution of KEGG (Kyoto encyclopedia of genes and genomes) data showed microbial metabolism to be the most involved function, followed by cellular processes.
UNASSIGNED: This is the first whole metagenome sequencing of the
lacrimal sac contents from failed DCR patients. The organisms identified varied significantly from those isolated from patients with primary acquired nasolacrimal duct obstruction (PANDO) using similar techniques and reflect altered
lacrimal microbiota in surgically unsuccessful DCRs.