PRJNA542149: Single-cell transcriptomes of the aging human skin reveal loss of fibroblast priming
概要: Fibroblasts are the main dermal cell type and are essential for the architecture and function of human skin. Important differences have been described between fibroblasts localized in distinct dermal layers, and these cells are also known to perform varied functions. However, this phenomenon has not been analyzed comprehensively yet. Here we have used single-cell RNA sequencing to analyze >15,000 cells from a sun-protected area in young and old donors. Our results define four main fibroblast subpopulations that can be spatially localized and functionally distinguished. Importantly, intrinsic aging reduces this fibroblast ‘priming’, generates distinct expression patterns of skin aging-associated genes, and substantially reduces the interactions of dermal fibroblasts with other skin cell types. Our work thus provides comprehensive evidence for a functional specialization of human dermal fibroblasts and suggests that the age-related loss of fibroblast priming contributes to human skin aging.
项目整体设计: Overall 5 samples were analyzed. Two of them are from young subjects (age=25) and serve as replicates, three of them are from old subjects (age >= 50) and serve as replicates.
| 测序方法: |
|
| 物种: |
|
| 组织: |
|
| 健康状况: |
|
| 发育阶段: |
|
| 生长方案: |
- |
| 处理方案: |
- |
| 提取方案: |
For each experiment, 4-mm punch biopsies were obtained from healthy whole skin specimens, immediately after resection from the inguinoiliac region of five male subjects. Samples were kept in MACS Tissue Storage Solution (Miltenyi Biotec) for no longer than 1 h before their enzymatical and mechanical dissociation with the Whole Skin Dissociation kit for human material (Miltenyi Biotec) and the Gentle MACS dissociator (Miltenyi Biotec), following the manufacturer's instructions. Cell suspensions were then filtered through 70-μm cell strainers (Falcon) and depleted of apoptotic and dead cells with the Dead Cell Removal Kit (Miltenyi Biotec). |
| 建库方案: |
Sequencing libraries were subsequently prepared following the Drop-seq methodology (Macosko et al., 2015), using a Chromium Single Cell Controller and the v2 chemistry from 10X Genomics. Thus, approximately 20,000 cells per sample were mixed with the retrotranscription reagents and pipetted into a Chip A Single Cell, also containing the Single Cell 3‘ Gel Bead suspension and Partitioning Oil. The Chip was subsequently loaded into a Chromium Single Cell Controller (10X Genomics) where the cells were captured in nanoscale droplets containing both the reagents needed for reverse transcription and a gel bead. Resulting Gel Bead-In-EMulsions (GEMs) were then transferred to a thermocycler in order to perform the retrotranscription following the manufacturer’s protocol. Each gel bead contained a specific 10X Genomics barcode, an Illumina R1 sequence, a Unique Molecular Identifier (UMI) and a poly-dT primer sequence. Therefore, from poly-adenylated mRNA the reaction produced full-length cDNA with a unique barcode per cell and transcript, which allowed tracing back all cDNA coming from each individual cell. Following an amplification step, cDNA was further processed by fragmentation, end repair and A-tailing double-sided size selection using AMPure XP beads. Finally, Illumina adaptors and a sample index were added through PCR using a total number of cycles adjusted to the cDNA concentration. After sample indexing, libraries were again subjected to double-sided size selection. Quantification of the libraries was carried out using the Qubit dsDNA HS Assay Kit (Life Technologies), and cDNA integrity was assessed using D1000 ScreenTapes (Agilent Technologies). Paired-end (26+74bp) sequencing (100 cycles) was finally performed with a HiSeq 4000 device (Illumina). |
| 分子类型: |
poly(A)+ RNA |
| 库的片段类型: |
PAIRED |
| 库的链类型: |
Forward |
| 测序平台: |
ILLUMINA |
| 测序仪型号: |
Illumina HiSeq X Ten |
| 链特异性: |
Specific |
| 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 |
Single-cell transcriptomes of the human skin reveal age-related loss of fibroblast priming.
Communications biology . 2020-04-23 [PMID:
32327715]