网络分析鉴定囊性纤维化患儿下呼吸道的多组学关联。

Network Analysis to Identify Multi-Omic Correlations in the Lower Airways of Children With Cystic Fibrosis.

机构信息

Department of Pediatrics, Division of Pulmonary and Sleep Medicine, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, United States.

Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, United States.

出版信息

Front Cell Infect Microbiol. 2022 Mar 10;12:805170. doi: 10.3389/fcimb.2022.805170. eCollection 2022.

Abstract

The leading cause of morbidity and mortality in cystic fibrosis (CF) is progressive lung disease secondary to chronic airway infection and inflammation; however, what drives CF airway infection and inflammation is not well understood. By providing a physiological snapshot of the airway, metabolomics can provide insight into these processes. Linking metabolomic data with microbiome data and phenotypic measures can reveal complex relationships between metabolites, lower airway bacterial communities, and disease outcomes. In this study, we characterize the airway metabolome in bronchoalveolar lavage fluid (BALF) samples from persons with CF (PWCF) and disease control (DC) subjects and use multi-omic network analysis to identify correlations with the airway microbiome. The Biocrates targeted liquid chromatography mass spectrometry (LC-MS) platform was used to measure 409 metabolomic features in BALF obtained during clinically indicated bronchoscopy. Total bacterial load (TBL) was measured using quantitative polymerase chain reaction (qPCR). The Qiagen EZ1 Advanced automated extraction platform was used to extract DNA, and bacterial profiling was performed using 16S sequencing. Differences in metabolomic features across disease groups were assessed univariately using Wilcoxon rank sum tests, and Random forest (RF) was used to identify features that discriminated across the groups. Features were compared to TBL and markers of inflammation, including white blood cell count (WBC) and percent neutrophils. Sparse supervised canonical correlation network analysis (SsCCNet) was used to assess multi-omic correlations. The CF metabolome was characterized by increased amino acids and decreased acylcarnitines. Amino acids and acylcarnitines were also among the features most strongly correlated with inflammation and bacterial burden. RF identified strong metabolomic predictors of CF status, including L-methionine-S-oxide. SsCCNet identified correlations between the metabolome and the microbiome, including correlations between a traditional CF pathogen, , a group of nontraditional taxa, including , and a subnetwork of specific metabolomic markers. In conclusion, our work identified metabolomic characteristics unique to the CF airway and uncovered multi-omic correlations that merit additional study.

摘要

囊性纤维化(CF)发病率和死亡率的主要原因是慢性气道感染和炎症导致的进行性肺疾病;然而,导致 CF 气道感染和炎症的原因尚不清楚。代谢组学通过提供气道的生理快照,可以深入了解这些过程。将代谢组学数据与微生物组数据和表型测量结果联系起来,可以揭示代谢物、下气道细菌群落和疾病结果之间的复杂关系。在这项研究中,我们对 CF 患者(PWCF)和疾病对照(DC)受试者的支气管肺泡灌洗液(BALF)样本中的气道代谢组进行了表征,并使用多组学网络分析来识别与气道微生物组的相关性。Biocrates 靶向液相色谱质谱(LC-MS)平台用于测量临床指示性支气管镜检查期间 BALF 中 409 种代谢组学特征。使用定量聚合酶链反应(qPCR)测量总细菌负荷(TBL)。Qiagen EZ1 高级自动化提取平台用于提取 DNA,使用 16S 测序进行细菌分析。使用 Wilcoxon 秩和检验评估疾病组之间代谢组学特征的差异,使用随机森林(RF)识别区分组间的特征。将特征与 TBL 和炎症标志物(包括白细胞计数(WBC)和中性粒细胞百分比)进行比较。稀疏监督典型相关网络分析(SsCCNet)用于评估多组学相关性。CF 代谢组的特征是增加的氨基酸和减少的酰基辅酶 A。氨基酸和酰基辅酶 A 也是与炎症和细菌负荷相关性最强的特征之一。RF 确定了 CF 状态的强有力代谢组学预测因子,包括 L-蛋氨酸-S-氧化物。SsCCNet 确定了代谢组学与微生物组学之间的相关性,包括传统 CF 病原体 ,一组非传统分类群,包括 ,以及特定代谢组学标志物的子网之间的相关性。总之,我们的工作确定了 CF 气道特有的代谢组学特征,并揭示了值得进一步研究的多组学相关性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ff94/8960254/2bf55bc2d352/fcimb-12-805170-g001.jpg

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