The functions of ocu-miR-205 in regulating hair follicle development in Rex rabbits

文献类型： 外文期刊

第一作者： Liu Gongyan

作者： Liu Gongyan;Li Shu;Liu Hongli;Zhu Yanli;Li Fuchang;Liu Gongyan;Li Shu;Liu Hongli;Zhu Yanli;Li Fuchang;Liu Gongyan;Bai Liya;Sun, Haitao;Gao Shuxia;Jiang Wenxue;Liu Gongyan;Bai Liya;Sun, Haitao;Gao Shuxia;Jiang Wenxue

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关键词： Ocu-miR-205; Dermal papilla cell; Rex rabbit; Hair follicle density

期刊名称：BMC DEVELOPMENTAL BIOLOGY （ 影响因子：1.978； 五年影响因子：2.533 ）

ISSN： 1471-213X

年卷期： 2020 年 20 卷 1 期

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收录情况： SCI

摘要： Background Hair follicles are an appendage of the vertebrate epithelium in the skin that arise from the embryonic ectoderm and regenerate cyclically during adulthood. Dermal papilla cells (DPCs) are the key dermal component of the hair follicle that directly regulate hair follicle development, growth and regeneration. According to recent studies, miRNAs play an important role in regulating hair follicle morphogenesis and the proliferation, differentiation and apoptosis of hair follicle stem cells. Results The miRNA expression profile of the DPCs from Rex rabbits with different hair densities revealed 240 differentially expressed miRNAs (|log(2)(HD/LD)| > 1.00 and Q-value <= 0.001). Among them, ocu-miR-205-5p was expressed at higher levels in DPCs from rabbits with low hair densities (LD) than in rabbits with high hair densities (HD), and it was expressed at high levels in the skin tissue from Rex rabbits (P < 0.05). Notably, ocu-miR-205 increased cell proliferation and the cell apoptosis rate, altered the progression of the cell cycle (P < 0.05), and modulated the expression of genes involved in the PI3K/Akt, Wnt, Notch and BMP signalling pathways in DPCs and skin tissue from Rex rabbits. It also inhibited the phosphorylation of the CTNNB1 and GSK-3 beta proteins, decreased the level of the noggin (NOG) protein, and increased the level of phosphorylated Akt (P < 0.05). A significant change in the primary follicle density was not observed (P > 0.05), but the secondary follicle density and total follicle density (P < 0.05) were altered upon interference with ocu-miR-205-5p expression, and the secondary/primary ratio (S/P) in the ocu-miR-205-5p interfered expression group increased 14 days after the injection (P < 0.05). Conclusions In the present study, ocu-miR-205 promoted the apoptosis of DPCs, altered the expression of genes and proteins involved in the PI3K/Akt, Wnt, Notch and BMP signalling pathways in DPCs and skin from Rex rabbits, promoted the transition of hair follicles from the growth phase to the regression and resting phase, and altered the hair density of Rex rabbits.

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