Exosomes of Adipose Tissue-Derived Stem Cells Promote Wound Healing by Sponging miR-17-5p and Inducing Autophagy Protein Ulk1. 2023

Yang An, and Fei Huang, and Xiaojie Tan, and Shiou Zhu, and Yonghuan Zhen, and Yujia Shang, and Pengbing Ding, and Dong Li, and Junhao Wu
From the Department of Plastic Surgery, Peking University Third Hospital.

Wound healing undergoes intricate phases: hemostasis, inflammation, proliferation, and remodeling. Stem cell therapy based on adipose tissue-derived stem cell exosomes (ADSCs-exo) is considered a potential effective treatment for accelerating wound healing. However, the molecular mechanisms of wound healing using ADSCs-exo remain largely unknown. Circular wounds, 1 × 1 cm, were generated on C57BL/6 mice, followed by OriCell C57BL/6 mouse adipose-derived mesenchymal stem cell suspension treatment, and wound area was measured and recorded at days 0, 7, and 21, respectively. A comprehensive transcriptome profiling of skin wounds was conducted in the mouse model. Importantly, the authors also examined autophagy and cell migration in mouse keratinocytes treated with ADSCs-exo. Further competing endogenous RNA networks were also used to reveal the relationship between Neat1 and Ulk1 . Mouse keratinocytes treated with ADSCs-exo showed significant up-regulation of pathways related to wound healing, including response to virus, bacterium, immune system, and wounding. Activated autophagy was detected, which significantly promoted the wound repair of mice. Competing endogenous RNA networks uncovered that Neat1 induces the expression of Ulk1 and thus up-regulates autophagic activity to promote wound repair through sponging miR-17-5p. Collectively, these results reveal a novel molecular mechanism that the autophagy pathway enhanced by the Neat1 /miR-17-5p/ Ulk1 axis can promote the wound healing and suggest that long noncoding RNA Neat1 loaded by ADSCs-exo might be a potential therapeutic target for skin nonhealing wounds. This study may provide new clues for the applications of ADSCs-exo in skin wounds and promote the development of ADSCs-exo therapy in clinical treatment of skin wounds.

UI MeSH Term Description Entries
D008810 Mice, Inbred C57BL One of the first INBRED MOUSE STRAINS to be sequenced. This strain is commonly used as genetic background for transgenic mouse models. Refractory to many tumors, this strain is also preferred model for studying role of genetic variations in development of diseases. Mice, C57BL,Mouse, C57BL,Mouse, Inbred C57BL,C57BL Mice,C57BL Mice, Inbred,C57BL Mouse,C57BL Mouse, Inbred,Inbred C57BL Mice,Inbred C57BL Mouse
D000273 Adipose Tissue Specialized connective tissue composed of fat cells (ADIPOCYTES). It is the site of stored FATS, usually in the form of TRIGLYCERIDES. In mammals, there are two types of adipose tissue, the WHITE FAT and the BROWN FAT. Their relative distributions vary in different species with most adipose tissue being white. Fatty Tissue,Body Fat,Fat Pad,Fat Pads,Pad, Fat,Pads, Fat,Tissue, Adipose,Tissue, Fatty
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D001343 Autophagy The segregation and degradation of various cytoplasmic constituents via engulfment by MULTIVESICULAR BODIES; VACUOLES; or AUTOPHAGOSOMES and their digestion by LYSOSOMES. It plays an important role in BIOLOGICAL METAMORPHOSIS and in the removal of bone by OSTEOCLASTS. Defective autophagy is associated with various diseases, including NEURODEGENERATIVE DISEASES and cancer. Autophagocytosis,ER-Phagy,Lipophagy,Nucleophagy,Reticulophagy,Ribophagy,Autophagy, Cellular,Cellular Autophagy,ER Phagy
D013234 Stem Cells Relatively undifferentiated cells that retain the ability to divide and proliferate throughout postnatal life to provide progenitor cells that can differentiate into specialized cells. Colony-Forming Units,Mother Cells,Progenitor Cells,Colony-Forming Unit,Cell, Mother,Cell, Progenitor,Cell, Stem,Cells, Mother,Cells, Progenitor,Cells, Stem,Colony Forming Unit,Colony Forming Units,Mother Cell,Progenitor Cell,Stem Cell
D014945 Wound Healing Restoration of integrity to traumatized tissue. Healing, Wound,Healings, Wound,Wound Healings
D051379 Mice The common name for the genus Mus. Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus
D055354 Exosomes A type of extracellular vesicle, containing RNA and proteins, that is secreted into the extracellular space by EXOCYTOSIS when MULTIVESICULAR BODIES fuse with the PLASMA MEMBRANE.
D035683 MicroRNAs Small double-stranded, non-protein coding RNAs, 21-25 nucleotides in length generated from single-stranded microRNA gene transcripts by the same RIBONUCLEASE III, Dicer, that produces small interfering RNAs (RNA, SMALL INTERFERING). They become part of the RNA-INDUCED SILENCING COMPLEX and repress the translation (TRANSLATION, GENETIC) of target RNA by binding to homologous 3'UTR region as an imperfect match. The small temporal RNAs (stRNAs), let-7 and lin-4, from C. elegans, are the first 2 miRNAs discovered, and are from a class of miRNAs involved in developmental timing. RNA, Small Temporal,Small Temporal RNA,miRNA,stRNA,Micro RNA,MicroRNA,Primary MicroRNA,Primary miRNA,miRNAs,pre-miRNA,pri-miRNA,MicroRNA, Primary,RNA, Micro,Temporal RNA, Small,miRNA, Primary,pre miRNA,pri miRNA

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