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This study found that ILC1-like cells can induce alopecia areata symptoms in both ex vivo human hair follicles and in vivo mouse models, challenging the view that alopecia areata is solely CD8+ T cell-driven.

Hair follicle stem cells may help repair the brain after a stroke.

This study found that combining LED yellow light with an engineered strain expressing CXCL12 improved wound healing and reduced inflammation in a mouse model of scald wounds.

This study reported that CXCL12 may have a dual role in alopecia areata, where decreased levels could impair angiogenesis and disrupt vascular support to hair follicles, while its overexpression might exacerbate autoimmune attacks on hair follicles, contributing to hair loss.

This case study reported significant but temporary hair regrowth and skin repigmentation in a patient with vitiligo and alopecia areata during treatment with oral ruxolitinib.

In this study, oral tofacitinib treatment led to significant hair regrowth and changes in skin and blood biomarkers in a patient with alopecia areata.

This study identified a significant genetic association between the TNFα gene and alopecia areata susceptibility in the Jordanian Arab population.

This study suggests that frontal fibrosing alopecia is a highly inflammatory disease involving TH1 and JAK-STAT pathways, without reduced hair keratins, highlighting JAK-STAT signaling as a potential therapeutic target.

This case report describes how anifrolumab, used beyond trial-eligible populations, led to significant clinical and serological recovery in a 45-year-old woman with organ-threatening systemic lupus erythematosus complicated by infection and resistant to conventional treatments like cyclophosphamide and rituximab.

This study identified specific genes upregulated in skin γδ T cells involved in alopecia areata, with findings suggesting these cells contribute to disease pathogenesis through inflammatory and Th1 response mechanisms in mouse and possibly human skin.

This study conducted a scoping review and meta-analysis revealing a complex chemokine profile in alopecia areata patients, with elevated Th1, Th2, and other immune pathway chemokines, suggesting broader immunomodulatory strategies may help address the disease's multifaceted immune dysregulation.

In this scoping review and meta-analysis, researchers found that patients with alopecia areata show a complex serum chemokine profile, predominantly involving Th1- and Th2-associated chemokines, suggesting that broader immunomodulatory strategies might address the diverse immune dysregulation observed in the disease.

In this scoping review and meta-analysis, researchers found that patients with alopecia areata exhibit complex chemokine profiles, with elevated levels of Th1, Th2, and other immune pathway-associated chemokines, suggesting the potential for broad immunomodulatory strategies to address the disease's immune dysregulation.

Alopecia areata is linked to immune system differences, with specific biomarkers like CXCL9 and CXCL10 being key for diagnosis and potential treatment targets.

This study observed that dandruff-affected scalp skin has increased T-cell infiltration in the epidermis and a reduction in the hair follicle's physiological immune privilege, particularly in the suprabulbar outer root sheath area, indicating a distinct immune microenvironment compared to healthy scalp.

In this study, researchers developed a mouse model of scarring alopecia and observed significant reductions in CD200R expression in affected skin, potentially linking this signaling pathway to immune attacks on hair follicles and suggesting new treatment targets for scarring hair loss.

This research developed new in vitro models for high-throughput screening of drugs that could protect or restore immune privilege in hair follicles, finding that Tofacitinib was effective in preventing inflammation-related marker upregulation, while Tacrolimus and αMSH worked specifically in outer root sheath keratinocytes.

This study explored COVID-related chilblains using transcriptomics and found they showed a distinct interferon and JAK/STAT pathway activation, absent in vaccine-related chilblains, with inflammatory cell types varying over time.

This study found that plasmacytoid dendritic cells may initiate alopecia areata in mice by overexpressing interferon-alpha.

This study demonstrated that the Alopecia Areata Disease Activity Index (ALADIN), a new biomarker, strongly correlates with treatment response in patients using JAK inhibitors for alopecia areata.

In this study, transgenic mice with Rank expression in hair follicles showed excessive lymph node growth, which could be normalized by neutralizing the overproduced RANKL, underscoring its role in immune system regulation.

This study found that interleukin-1-alpha and oncostatin-M levels were positively associated with PCOS development, while interleukin-7, IL15RA, and CXCL11 were negatively associated, suggesting a connection between inflammatory factors and PCOS.

This study identified ten key hub genes and pathways crucial for understanding the molecular mechanism of hair growth by comparing dermal papilla cells in 2D and 3D cultures.

This narrative review highlights current insights into how perifollicular fibrosis contributes to androgenetic alopecia, by hindering hair regrowth and treatment response, and outlines potential antifibrotic therapies, though conclusive evidence from randomized controlled trials is still needed.

Mechanical tension worsens keloid scars by activating inflammation and fibrosis pathways.

In this study, researchers found that AP-2α and AP-2β are critical for maintaining epidermal homeostasis in adult skin, with their combined loss leading to severe skin and hair abnormalities and early skin inflammation due to impaired keratinocyte differentiation.

This study used single-cell and spatial transcriptomic profiling to identify specific molecular markers in human follicular dermal papilla cells, enhancing understanding of their role in hair follicle development.

This study found that dysregulated microRNA expression in mice may be linked to aberrant gene activity that contributes to the development of alopecia areata.

This study found significant upregulation of IDO-1 and IDO-2 in human basal cell carcinomas, suggesting that IDO production may confer immune privilege characteristics to the tumors, potentially impacting their growth.