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The study demonstrated that Myc activation in transgenic mice led to the depletion of the epidermal stem cell compartment by altering adhesive interactions with the local microenvironment. This was evidenced by changes in gene expression, particularly the downregulation of genes related to cell adhesion and the extracellular matrix, such as integrins and collagens. Myc activation promoted differentiation into sebocytes and interfollicular epidermis rather than hair lineages, impairing cell adhesion, spreading, and motility. These effects were linked to decreased formation of hemidesmosomes and reduced expression of extracellular matrix proteins, contributing to delayed wound healing and altered keratinocyte behavior. The findings highlighted Myc's role in modulating stem cell behavior, impacting skin biology and diseases related to stem cell dysfunction.

The study investigated the neural potential of stem cells in the bulge region of hair follicles using nestin-GFP mice. These cells demonstrated multipotency, capable of differentiating into various cell types, including neuronal, astrocytic, and oligodendrocytic cells, both in vitro and in vivo. Transcriptional profiling revealed a unique gene expression signature, indicating a distinct population of multipotent stem cells with broad differentiation potential. The research showed that these cells could form "hairspheres" and differentiate into neurons, astrocytes, smooth muscle-like cells, and keratinocytes under specific conditions. In vivo experiments confirmed their neural potential by successful differentiation into neuronal cells upon transplantation into chick embryos. The findings highlighted the plasticity of adult tissue-specific stem cells, challenging previous notions about their limited differentiation capabilities and suggesting their potential to contribute to both ectodermal and mesodermal lineages.