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This narrative literature review examined how linking embryonic development with non-genetic skin anomalies can improve diagnostic accuracy, guide prenatal counseling, and enrich dermatology education by revealing specific vulnerabilities in skin morphogenesis and supporting advances in regenerative medicine.

This study constructed a comprehensive atlas of prenatal human skin, revealing that innate immune cells, such as macrophages, play a crucial role in skin morphogenesis by interacting with non-immune cells, influencing hair follicle formation and angiogenesis beyond their traditional immune functions.

This study found that maintaining a low level of Wnt/β-catenin activity is crucial for mammary gland development, as excessive activity inhibits branching and promotes characteristics of hair follicles instead, highlighting its role in skin appendage identity decisions.

This study reports that chemotherapy-induced hair loss affects up to 65% of patients, typically within 1 to 3 weeks of treatment, while scalp cooling may help prevent severe hair loss with taxane-based therapies.

This study found that tumor immunotherapy, while effective against solid tumors, can disrupt the immune balance in hair follicles, causing follicular toxicity and alopecia, highlighting the need for targeted interventions to manage these adverse effects.

This study suggests that CD8+ cytotoxic T lymphocytes play a crucial role in the development of alopecia areata, based on observations in rodent models that mimic human autoimmune disease.

This study investigated single-cell changes in photoaged skin, revealing distinct cell clusters and increased activity in PD-L1 and PD-1 pathways in sun-exposed areas, enhancing understanding of UVA-induced skin damage and potential prevention targets for photoaging and UV-induced skin cancers.

This study found that AP-2α and AP-2β transcription factors are crucial for maintaining adult skin homeostasis, with their inactivation in keratinocytes leading to impaired differentiation, hair abnormalities, and inflammation, highlighting their key regulatory roles.

This review integrates studies on mouse models and human clinical observations to highlight the role of immune cells in skin development and how their dysregulation leads to skin disorders, suggesting potential therapeutic pathways for skin regeneration.

This review discusses how transposable element activation may hinder tissue regeneration and explores mechanisms to control this activity, reporting no new experimental results.

This study examines the genetic underpinnings of chronic dermatological conditions like acne, androgenetic alopecia, and alopecia areata, concluding that a deep understanding of these mechanisms can advance patient-specific treatments and inform cosmetic practices related to skin and hair health.

This article reviews the cutaneous side effects of immune checkpoint inhibitors and targeted therapies for skin cancers, noting that while generally mild, these effects can influence treatment decisions and quality of life, underscoring the need for physicians to be aware of these adverse reactions.

This study used a probabilistic Boolean network model to explore hair follicle cell fate regulation and predicted that varying TGF-β levels, in coordination with BMP and TNF, can influence either apoptosis or cell proliferation during different follicle growth stages.

In this study, researchers identified key miRNAs and target genes involved in hair follicle development in Merino sheep, providing insights that could aid in improving sheep breeding for wool quality.

This study proposes that the ability of humans to grow long scalp hair is linked to the evolutionary adjustment of molecular checkpoints that regulate the hair growth cycle, potentially influenced by its roles in communicating age, maturity, and social signals.

This mini-review details how the SOX family of transcription factors contributes to cancer immune evasion by affecting antigen presentation, impacting the tumor's immunosuppressive environment, and regulating immune checkpoints, offering insights for developing novel immunotherapy strategies.

This review summarizes recent discoveries about how tissue-resident stem cells interact with their environments during normal conditions and after injury, without reporting new results.

In a conditional knockout mouse model, this study found that loss of the transcription elongation factor SPT6 in basal keratinocytes led to psoriasis-like skin inflammation and delayed wound healing, suggesting SPT6 plays a crucial role in maintaining epidermal immune quiescence by suppressing proinflammatory NF-κB signaling.

This review discusses the potential role of vascular endothelial cells as signaling niches influencing epithelial stem cell states in the skin, emphasizing the need for further exploration in this area.

In this study, researchers discovered that ROR2, a Wnt receptor, plays a crucial role in regulating hair follicle stem cell self-renewal and maintenance, compensating for the absence of β-catenin.

This study identified a gene expression signature in mouse embryonic dermal fibroblasts that depends on Wnt/β-catenin activity, potentially influencing dermal fibroblast identity and function.

This study identified the placenta at the base of the ovary as the origin of poplar seed hair development and detailed transcriptome dynamics during the growth process.

This review explores various theories of colorectal cancer stem cell biology and highlights the need for better identification and targeting of these cells to advance treatment strategies, but reports no new clinical findings.

This study identified overexpression of certain immune-related genes and underexpression of genes in specific signaling pathways in premature androgenetic alopecia, suggesting potential new therapeutic targets.

This study discovered that the circadian clock influences hair follicle regeneration, making hair grow faster in the morning and causing more radiation-induced hair loss in the morning compared to the evening.

This article discusses the roles of epidermal stem cells in maintaining skin homeostasis and highlights how deregulation in signaling pathways may lead to cancer, but it reports no new experimental results.

This study observed that CIP/KIP proteins play a significant role in regulating cell cycle arrest and differentiation in human hair follicles, supporting hair growth and formation in the anagen phase.

This study found that NFI-C plays a crucial role in the transition from the telogen to anagen phase of the hair follicle cycle, affecting hair growth initiation in mice.

In this study, treatment with recombinant DKK2 was shown to significantly stimulate hair progenitor cell growth and enhance hair shaft elongation in ex vivo human hair follicle cultures by activating the Wnt/ẞ-catenin signaling pathway, suggesting a potential role for DKK2 in promoting hair growth.

This review highlights LTBP1 as a critical integrator in disease processes, showing its dual role in cancer progression and suppression, its pathological influence in fibrosis, and its contribution to various disorders, suggesting its potential as a biomarker and therapeutic target.