Single-cell transcriptomic reconstruction of the human hair cycle: Capturing the temporal dynamics of skin tissue remodeling
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE237520 | GEO | 2025/07/31
REPOSITORIES: GEO
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Project description:Despite the recent application of single-cell RNA-sequencing to aspects of mouse skin biology, the full cellular heterogeneity of the mouse skin (including both epidermis and skin stroma) and its relationship with the hair cycle is still uncharted. In order to systematically compare the cellular composition of mouse skin during rest and hair growth, we created single-cell RNA-sequencing libraries from full thickness mouse skin cell suspensions sampled during anagen (5w) and telogen (9w).
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Project description:OBJECTIVE: To study the function of DP cells during the development of hair follicles in cashmere goats, we used single-cell sequencing to perform transcriptome sequencing of skin samples from different periods. Method: Single cell barcoding and library preparation were performed based on 10x Genomics single-cell RNA sequencing platform, CellRanger (v2.2.0) software was used for analyzing raw sequencing data, the quality control (QC) and cell clustering were analyzed with single- Cell RNA seq Seurat software (v2.3.0) based on R environment, Monocle (v 2.4.0) was used to order single cells along pseudotime according, Metascape (http://metascape.org/gp/index.html#/main /step1) was used to perform gene ontology (GO) analysis Conclusion: we show the function of four different intermediate DP cells: Intermediate cells 10 show important functions in the growth of villi and maintenance of villus attachment to the skin, and intermediate cell 1 shows important functions in the process of apoptosis and villous shedding of hair Follicles, intermediate cell 0 initiates a new follicular cycle, completes the migration of hair follicles and the occurrence of villi, and intermediate cell 15 maybe DP progenitor cells, In addition, we speculated the apoptotic order of different bulge cells. More importantly, we provided a molecular landscape for the mechanism of DP cells in the process of hair follicle cycle initiation. Skin samples from telogen, anagen, and catagen were used to sequence single-cell transcriptomes, revealing the function and evolution of DP cells.
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2010-04-08 | E-GEOD-14006 | biostudies-arrayexpress
Project description:Hair follicles undergo recurrent cycling of controlled growth (anagen), regression (catagen), and relative quiescence (telogen) with a defined periodicity. Taking a genomics approach to study gene expression during synchronized mouse hair follicle cycling, we discovered that, in addition to circadian fluctuation, CLOCK-regulated genes are also modulated in phase with the hair growth cycle. During telogen and early anagen, circadian clock genes are prominently expressed in the secondary hair germ, which contains precursor cells for the growing follicle. Analysis of Clock and Bmal1 mutant mice reveals a delay in anagen progression, and the secondary hair germ cells show decreased levels of phosphorylated Rb and lack mitotic cells, suggesting that circadian clock genes regulate anagen progression via their effect on the cell cycle. Consistent with a block at the G1 phase of the cell cycle, we show a significant upregulation of p21 in Bmal1 mutant skin. While circadian clock mechanisms have been implicated in a variety of diurnal biological processes, our findings indicate that circadian clock genes may be utilized to modulate the progression of non-diurnal cyclic processes. To gain molecular understanding of the the hair cycle delay in Clock mutant mice, we profiled the dorsal skin of Clock mutant and their wild-type littermates at P23. At P23, the skin samples are comparable because all the samples are in telogen just prior to the hair cycle delay was observed. Histological sections were used to classify each sample into specific stage of the hair growth cycle based on established morphological guidelines. RNA from each mouse dorsal skin were separately hybridized to an Affymetrix array.
2009-07-17 | E-GEOD-13579 | biostudies-arrayexpress
Project description:Single-cell transcriptomic reconstruction of the human hair cycle: Capturing the temporal dynamics of skin tissue remodeling
| PRJNA995574 | ENA
Project description:Fgf18 gene is strongly expressed in hair follicles of mouse dorsal skin during regressing (catagen) and resting (telogen) phases of hair cycle, but not in growth (anagen) phase. This study aims at identifying the function of Fgf18 in the regulation of hair cycle. To define target genes of Fgf18 during telogen phase of hair cycle, we generated mice in which Fgf18 gene is conditionally knocked out in keratin 5-positive epithelial cells (referred to as Fgf18 cKO below). We carried out microarray experiments with mouse back skin samples harboring telogen hair follicles obtained from three 42-d-old Fgf18 cKO male mice, or from three 42-d-old C57BL/6 male mice as control. Total RNA was isolated from each mouse and further purified to polyA RNA using oligo dT30 columns. The RNA samples were pooled for each group. Gene expression was analyzed by one-color analysis using duplicate arrays for each group.
2017-05-15 | E-GEOD-29547 | biostudies-arrayexpress
Project description:Hair follicles undergo recurrent cycling of controlled growth (anagen), regression (catagen), and relative quiescence (telogen) with a defined periodicity. Taking a genomics approach to study gene expression during synchronized mouse hair follicle cycling, we discovered that, in addition to circadian fluctuation, CLOCK-regulated genes are also modulated in phase with the hair growth cycle. During telogen and early anagen, circadian clock genes are prominently expressed in the secondary hair germ, which contains precursor cells for the growing follicle. Analysis of Clock and Bmal1 mutant mice reveals a delay in anagen progression, and the secondary hair germ cells show decreased levels of phosphorylated Rb and lack mitotic cells, suggesting that circadian clock genes regulate anagen progression via their effect on the cell cycle. Consistent with a block at the G1 phase of the cell cycle, we show a significant upregulation of p21 in Bmal1 mutant skin. While circadian clock mechanisms have been implicated in a variety of diurnal biological processes, our findings indicate that circadian clock genes may be utilized to modulate the progression of non-diurnal cyclic processes. To investigate the molecular control of hair follicle cycling, we profiled mRNA expression in mouse dorsal skin at multiple representative time points in the synchronized second postnatal hair growth cycle and in a depilation-induced hair growth cycle. For profiling of second synchronized and depilation-induced hair growth cycle, the same upper-mid region of dorsal skin was excised from C57BL/6 mice at representative postnatal days (P). The time points for second hair growth cycle are classified into different phases of the hair growth cycle based on established morphological guidelines as follow: early anagen (P23, P25), mid anagen (P27), late anagen (P29, P34), early catagen (P37, P39), mid catagen (P41), and telogen (P44). Depilation-induced hair growth cycle by applying wax/rosin mixture on the dorsal skin of seven-week old mice (all follicles in telogen) was performed on mice. The corresponding phases of the hair growth cycle at number of days following depilation (D) is as follow: early anagen (D3), mid anagen (D5), late anagen (D8, D12), and early catagen (D17). For each time point, multiple biological replicates were profiled, with each mouse dorsal skin separately hybridized to an Affymetrix array.
2009-07-17 | E-GEOD-11186 | biostudies-arrayexpress