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In a rat skin wound model, this study observed that a composite dressing using chitosan hydrogel and exosomes derived from adipose mesenchymal stem cells enhanced wound healing by promoting collagen deposition, angiogenesis, and regeneration of hair follicle structures.

In this study, the researchers developed a biomimetic multilayer composite scaffold combining a decellularized amniotic membrane, fibroblast-laden collagen gel, and epidermal stem cells, which healed full-thickness skin wounds more quickly and effectively by regenerating hair follicles without scarring compared to Moropicin ointment.

Substance P helps restore skin thickness and cell renewal when sensory nerves are reduced.

In this study, researchers found that Wnt4 overexpression increased the thickness of burn wounds by promoting epidermal cell migration and activating the canonical Wnt signaling pathway.

Arg1+ macrophages may play a role in Alopecia Areata, offering new treatment targets.

This study found that transplanted ES cell-derived epidermal stem cells promoted the formation of epidermis, sweat gland-like, sebaceous gland-like, and hair follicle-like structures in mouse skin defects.

The researchers reported that in hairless mice, epidermal cell division orientations and epidermal thickness varied by body site, with dorsal and ear epidermis primarily dividing parallel to the basement membrane, unlike hind paw and tail epidermis.

Chitosan/LiCl composite scaffolds help heal deep skin wounds better.

This study found that melatonin treatment increased epidermal thickness, subcutaneous fat, and dermal-related factors in postmenopausal rats, suggesting benefits for skin structure after menopause.

This study reports that mesenchymal stem cell-conditioned medium promoted dermal cell migration and proliferation, enhancing wound healing but not direct hair growth, in vitro and in adult mouse models.

This special issue reviews advancements in engineering cell microenvironments for tissue engineering, highlighting various studies on interventions like silk fibroin and platelet-rich plasma, but presents no new empirical findings.

This study found that fibronectin-attached cell sheets significantly improved wound healing in vivo by increasing wound closure rates, reducing inflammation, and promoting tissue regeneration compared to conventional cell sheets.

Fat-derived stem cell therapies can potentially increase hair growth and thickness in people with hair loss.

Fat-derived stem cell therapies can potentially increase hair growth and thickness in people with hair loss.

In a porcine model, this study observed that using an External Tissue Expansion Device increased epidermis thickness, cell proliferation, and vessel density at fat graft recipient sites.

This study observed that alopecia areata can be induced and serially transferred in C3H/HeJ mice using skin grafts, providing a useful model for studying the disease in humans.

This study found that dermal sheath stem cell characteristics are lost with aging in humans, affecting skin rejuvenation and structure, and identified specific proteins like Activin A influencing keratinocyte and fibroblast activity.

This study found that intradermal administration of adipose-derived stem cell–conditioned medium significantly increased hair density and dermal thickness, suggesting potential regenerative effects on both hair follicles and the interfollicular scalp in patients with alopecia.

This study found that dermis micrografting improved hair growth and density in patients with androgenetic alopecia over 4, 6, and 12 months, suggesting it could be a novel treatment option.

This study found that type II diabetes inhibited hair follicle regeneration and skin cell proliferation in mice, potentially explaining reduced skin renewal and chronic wound formation in diabetes.

This review discusses the impact of calorie restriction on enhancing stem cell potency and regenerative abilities in mammalian tissues and reports no new experimental results.

In this study, nondermal-derived CD34+ cells from adult peripheral blood were found to enhance wound healing and contribute to hair follicle neogenesis and skin regeneration.

This meta-analysis reported that stem cell-derived conditioned medium effectively increases hair density and thickness in patients with alopecia, with longer treatment durations showing greater improvements.

This study found that aging mice with an epidermal deletion of DNA methyltransferase 1 had a reduced number of hair follicles, due to decreased stem cell activation probability.

This study found that exosomes derived from dental pulp mesenchymal stem cells (DPSC-Exos) significantly promoted hair regrowth and follicle density in a mouse model of androgenetic alopecia, showing similar efficacy to minoxidil by activating pathways that improve follicular vascularization and dermal papilla cell function.

This study found that exosomes derived from human umbilical cord mesenchymal stem cells helped preserve melanocyte function and mitigate stress-induced hair depigmentation in mice by activating the Nrf2-ARE antioxidant pathway under acute neurogenic oxidative stress.

In this review, recent innovations in hair transplantation, such as AI-assisted graft selection, robotic systems, stem cell therapy, and advanced drug delivery techniques, are reported to enhance hair density and thickness for more natural results and higher patient satisfaction by addressing limitations of traditional methods.

Collagen scaffolds in cell therapy can transform skin to be more resilient and pressure-responsive.

This randomized control trial reported that mesenchymal stem cell-derived exosomes significantly increased hair density and thickness in patients with androgenic alopecia, with a mean increase of 35 hairs/cm² over 12 weeks compared to the placebo group, which showed minimal hair density changes.