Gene Expression
Nebulas
Gene Expression Nebulas概要: Myalgic encephalomyelitis / chronic fatigue syndrome (ME/CFS) is a syndrome of unknown etiology characterized by profound fatigue exacerbated by physical activity, also known as post-exertional malaise (PEM). Previously, we did not detect evidence of immune dysregulation or virus reactivation outside of PEM periods. Here we sought to determine whether cardiopulmonary exercise stress testing of ME/CFS patients could trigger such changes. ME/CFS patients (n=14) and matched sedentary controls (n=11) were subjected to cardiopulmonary exercise on 2 consecutive days and followed up to 7 days post-exercise, and longitudinal whole blood samples analyzed by RNA-seq. Although ME/CFS patients showed significant worsening of symptoms following exercise versus controls, with 8 of 14 ME/CFS patients showing oxygen consumption (V̇O2) on day 2, transcriptome analysis yielded only 6 differentially expressed gene (DEG) candidates when comparing ME/CFS patients to controls across all time points. None of the DEGs were related to immune signaling, and no DEGs were found in ME/CFS patients before and after exercise. Virome composition (P=0.746 by chi-square test) and number of viral reads (P = 0.098 by paired t-test) were not significantly associated with PEM. These observations do not support transcriptionally-mediated immune cell dysregulation or viral reactivation in ME/CFS patients during symptomatic PEM episodes.
项目整体设计: RNAseq of whole blood samples from ME/CFS patients and controls following exercise.
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| 生长方案: | - |
| 处理方案: | Cardiopulmonary exercise |
| 提取方案: | Whole blood (2.5 mL) from cases and controls was drawn into a PAXgene Blood RNA Tube (Qiagen, Valencia, CA) to stabilize RNA prior to extraction and stored at -20C. Total RNA was extracted using the PAXgene Blood RNA Kit (Qiagen, Valencia, CA) and all samples were lyophilized in RNAstable reagent (Biomatrica, San Diego, CA) for shipment at room temperature and long-term storage. |
| 建库方案: | The Ovation Human blood RNA-seq kit (Nugen, San Carlos, CA) was used to generate strand-specific RNA-seq libraries depleted for reads derived from rRNA (12S, 16S, 18S and 28S genes) and globin (HBA1, HBA2, HBB and HBD genes) according to the manufacturer^s protocol. Briefly, 100ng RNA extract, as measured by Qubit RNA high sensitivity kit (Thermo Fisher, South San Francisco), were DNased and cDNA was prepared from extracted total RNA by reverse transcription using a mixture of random and poly(T) primers. Successive steps of end-repair, adaptor ligation, strand selection via nucleotide analog-targeted degradation, insert-dependent adaptor cleavage for targeted depletion of rRNA and globin reads, PCR amplification, and bead-based purification were then used to construct cDNA libraries for RNA-seq analysis. |
| 分子类型: | poly(A)+ RNA |
| 库的片段类型: | paired |
| 库的链类型: | Reverse; - |
| 测序平台: | Illumina |
| 测序仪型号: | Illumina HiSeq 2500 |
| 链特异性: | Specific; Unspecific |
| 数据来源 | GEN样本编号 | GEN数据集编号 | 系列编号 | 项目编号 | 样本编号 | 样本名称 | 生物样本编号 | 样本访问号 | 实验访问号 | 释放时间 | 提交时间 | 最后更新时间 | 物种 | 种族 | 族裔 | 年龄 | 年龄单位 | 性别 | 来源名称 | 组织 | 细胞类型 | 细胞亚型 | 细胞系 | 疾病 | 疾病状态 | 发育阶段 | 突变/变异 | 表型 | Condition Detail | 生长方案 | 处理方案 | 提取方案 | 建库方案 | 分子类型 | 库的片段类型 | 链特异性 | 库的链类型 | 加标（Spike-In） | 测序方法 | 测序平台 | 测序仪型号 | 细胞数 | 测序片段数 | 碱基数 | 平均测序片段长度_1 | 平均测序片段长度_2 | 唯一比对率 | 多重比对率 | 覆盖度 |
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