The function of DP cells during the development of hair follicles in cashmere goats

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. Overall design: Feng, Yang