Immune Microenvironment of Hair Follicles in Tumor Immunotherapy

This study found that RNase L acts as a regeneration repressor gene in mammals, as seen in Rnasel-/- mice which showed increased regenerative capacity and elevated Wound Induced Hair Neogenesis through enhanced IL-36α signaling, suggesting a tradeoff between regeneration and immune regulation.

This literature review examined topical treatments for various alopecia types, finding that minoxidil and corticosteroids are effective for multiple conditions, while JAK inhibitors show promise specifically for alopecia areata. The study emphasized the importance of individualized therapeutic approaches to enhance outcomes in hair loss management.

Anti-PD-L1 immunotherapy can cause hair loss and unexpected hair color change, but treatment can restore hair growth and color.

The study investigated immune cell patterns around the hair follicle infundibulum in androgenetic alopecia, revealing significant differences in immune signatures between patients with AGA and control donors, specifically noting an enrichment of CD4 cells in the patient group.

This study investigates the potential of umbilical cord mesenchymal stem cells exosome (UCMSC-Exos) to promote hair growth, focusing on its mechanisms of action, though specific results are not reported.

This manuscript reviews the latest understanding of alopecia areata's pathogenesis, highlighting the roles of genetic, immunological, and environmental factors, with a focus on immune responses involving IFN-γ and cytotoxic CD8+ T-cells as key contributors to hair follicle inflammation and function disruption without follicle destruction.

This study developed a technique to limit genetic recombination to regulatory T cells to investigate whether self-tolerance is maintained in non-lymphoid tissues, an area previously not well understood.

This review highlights the importance of apoptosis in the hair cycle, particularly its role in hair follicle regression and loss, suggesting that understanding its mechanisms can aid in developing treatments to reduce hair loss and promote hair growth.

In this study, researchers found that Hdac1 and Hdac2 are crucial for maintaining the quiescence and survival of dermal papilla cells in the hair follicle, regulating the hair cycle by controlling cell-cycle genes and Wnt signaling.

In this study, FGF12 was found to promote hair growth in mice by inducing the anagen phase of hair follicles, suggesting potential for hair loss therapy.

This study examined gene expression in cashmere goats and identified key pathways and molecular regulators that influence hair follicle growth stages and melatonin's role in promoting cashmere growth.

This study found that hair shaft miniaturization in aging and genetic hypotrichosis leads to hair follicle stem cell loss through mechanical compression and apoptosis mediated by the Piezo1 channel.

This review discusses the role of dermal macrophages in stress-induced hair regeneration and reports no new clinical findings, highlighting the need for further research into macrophage dynamics for potential hair loss therapies.

This review highlights the challenges in treating alopecia areata, noting that current therapies often lead to relapse and have uncertain long-term effectiveness; it also points to potential future treatments such as JAK-STAT inhibitors and PRP.

This review discusses how inflammation influences hair follicle stem cell activities like wound healing and follicle cycling and suggests a potential link between inflammation, stem cell activation, and programmed cell death.

This review discusses immune privilege in anagen hair follicles and its collapse in alopecia areata, emphasizing the importance of restoring this function for effective management and disease relapse prevention.

This review outlines various dermatologic adverse events associated with targeted therapies and immunotherapies, emphasizing the need for collaboration between dermatologists and oncologists to manage these effects effectively; it reports no new clinical findings.

This study demonstrates that inhibiting SFRP1 with the antagonist WAY-316606 enhances hair growth in human scalp hair follicles ex vivo by facilitating Wnt signalling.

In this mouse study, NF-κB was shown to play a role in hair follicle cycling and morphogenesis, with specific activity patterns differing by hair type and involving noncanonical signaling for zigzag hair bending.

This study shows that macrophage-induced TNF signaling can activate hair follicle stem cells and promote new hair follicle formation after wounding by regulating AKT/β-catenin pathways.

This study identified a critical NF-κB-LHX2-TGFβ2 signaling pathway essential for primary hair follicle development in mice, revealing new insights into the underlying mechanisms of morphogenesis.

This study observed that applying JAK-STAT pathway inhibitors to mouse and human skin led to rapid hair growth by inducing the anagen phase of hair follicles.

This study found that cyclosporine A's enhancement of hair growth in mice is partly due to its ability to block the nuclear translocation of apoptosis-inducing factor, slowing the hair follicle transition to the catagen phase.

In this study, cyclosporine A stimulated hair growth in mouse vibrissae organ culture by promoting matrix cell proliferation and altering growth factor expression.