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Trichohyalin in hair can trigger immune attacks in alopecia areata.

This review discusses recent findings on the mechanisms driving bullous pemphigoid, highlighting epitope spreading and the roles of regulatory T cells, and reports no new experimental results.

In this study, researchers found that alkylating chemotherapy causes hair follicle stem cells to lose their regenerative ability by initially triggering proliferation followed by apoptosis, leading to permanent regeneration loss.

In this study, transiently activating the sonic hedgehog signaling pathway in chickens transformed reticulate scales on the feet into feathers comparable to body feathers, without ongoing treatment, suggesting this pathway affects the diversity of bird skin appendages.

This study reported an increased likelihood of hidradenitis suppurativa flares in patients who received mRNA COVID-19 vaccines compared to those who received non-mRNA vaccines, indicating a potential association that warrants further research in larger populations.

This review discusses the role of hair follicle stem cell metabolism, ageing, and microenvironment in hair growth disorders and compiles recent research on using stem cell-based regenerative medicine for treating alopecia, without reporting new clinical results.

This study found that systemic ovalbumin–aluminum sensitization followed by cutaneous challenge in mice induced thermal hyperalgesia, increased spinal cord gliosis, and sprouting of nociceptive fibers, along with elevated mast cell and nerve profile densities in the skin compared to controls.

In this case study, a 43-year-old male with anti-GBM disease experienced a relapse triggered by hair dye, leading to diffuse alveolar hemorrhage; managing this with plasmapheresis, intravenous immunoglobulins, and rituximab suggests rituximab may be beneficial for relapsing cases.

This study reports that SARS-CoV-2 infection, COVID-19 vaccination, and off-label dupilumab treatment may exacerbate psoriasis, with overlapping inflammatory pathways involving cytokines like IL-17 and TNF-α. Histopathological similarities between psoriasis flares and COVID-19 skin manifestations were noted, suggesting a potential connection requiring further research.

In this study, the deletion of NIPP1 in keratinocytes led to chronic skin inflammation and epidermal changes in mice, with early cell-cycle arrest and premature senescence observed, potentially contributing to reduced mutagen sensitivity.

This study reports that the Pfizer-BioNTech COVID-19 vaccine showed 52% protection against COVID-19 after the first dose and 95% after the second in phase 3 trials.

This study observed that women with female pattern hair loss had a significantly lower ratio of estradiol to free testosterone compared to healthy controls, suggesting a potential hormonal trigger for hair loss.

This case study highlights a patient with alopecia areata who also has eosinophilic esophagitis, suggesting it may be considered an atopic disease and a potential trigger for alopecia areata in affected patients.

This study reports that telogen effluvium, a reversible hair loss condition following COVID-19, is influenced by factors like stress and inflammation, but appropriate dermatological treatment can aid recovery, as highlighted by a clinical case example.

This article reviews the theory that certain cultural practices, like specific haircuts, contribute to common baldness but reports no new clinical findings.

In this study on mice, intensive stress through methods like resiniferatoxin injections and physical restraint was found to inhibit hair follicle growth, with the mechanism involving the sympathetic nervous system and the cAMP signaling pathway in hair follicle stem cells.

This case report describes a 38-year-old man who experienced alopecia areata immediately following a COVID-19 infection with high fever, suggesting a potential association between the two events.

This article explores potential risk factors for central centrifugal cicatricial alopecia and suggests that seborrheic dermatitis may play a role in its development, but it reports no new scientific findings.

This study found that gene expression patterns can effectively distinguish the cashmere growth cycle stages and highlight molecular pathways, suggesting melatonin's role in regulating cashmere growth in Inner Mongolian goats.

This study reports that melatonin influences gene expression related to cashmere growth cycles in Inner Mongolian cashmere goats, potentially aiding in understanding and enhancing cashmere yield through molecular regulation.

The KDM1 gene helps Venus flytraps close by managing potassium ions.

This study found that disrupting testosterone biosynthesis in male rats mitigated cardiovascular and autonomic impairments caused by endotoxemia, indicating testosterone's significant role in these conditions.

In this study, neutralizing nerve growth factor reduced stress-triggered hair loss in mice, suggesting that nerve-immune system interactions and neurogenic inflammation contribute to this condition.

This study in mice demonstrated that stress or nerve growth factor injection increases sensory neuron activity related to skin innervation, suggesting a strong connection between stress perception and neurogenic skin inflammation.

This study found that selective deletion of Ctip2 in epidermal keratinocytes in adult mice leads to atopic dermatitis-like inflammation and suggests Ctip2 plays a crucial role in skin barrier maintenance and inflammatory regulation.

In this study, researchers found that impaired cholesterol biosynthesis in hair follicles may trigger an inflammatory immune response linked to primary cicatricial alopecia, providing new insights into the disorder's pathogenesis.

This article explores potential mechanisms of acneiform skin eruptions linked to EGFR inhibition in cancer patients, focusing on EGFR's role in controlling IL-1-dependent inflammation at hair follicles, but reports no clinical results.

This study found that in mice, EGFR activation suppresses mitotic regulators like Rcc2 and Stathmin 1, facilitating the transition to catagen in hair follicles.

This study observed hair-specific transcription of a reporter gene in transgenic mice, with increased expression after dexamethasone and ultraviolet B treatment.

This study found that acute stress can cause rapid hair loss by triggering necrosis in hair follicle cells and initiating autoimmunity, revealing a mechanism where stress-induced nerve activity leads to tissue damage and immune system activation.