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In this study, α-MSH and cyclic AMP were found to stimulate melanogenesis in hair follicle cultures, while cyclic GMP and melatonin inhibited melanin production but not tyrosinase activity.

This study found that RhoA influences embryonic stem cell proliferation through the PKN1-cyclin D1 pathway in vitro, suggesting RhoA as a potential target for wound healing therapies.

This study presents a method for extracting and measuring cyclic AMP in small amounts of skin tissue, finding varying levels in the dermis, epidermis, and hair follicles.

This study observed that enzyme activity influencing estradiol-to-estrone conversion in Wistar rat skin varied with the hair cycle in dorsal skin but was minimal in plantar skin.

This study found that DHHC13 is crucial for hair anchoring and skin barrier function, with its deficiency in Zdhhc13(skc4) mice leading to cyclic alopecia and skin abnormalities due to cornifelin deficiencies.

This study found that the expressions of CDK inhibitors p21waf1/cip1 and p27kip1 were higher during the anagen phase compared to telogen, suggesting a role in follicular epithelial cell differentiation.

This laboratory study found that nonanal, a plant scent compound, may stimulate growth factors and cell proliferation in human hair follicle dermal papilla cells, suggesting a cAMP-mediated mechanism.

In this study, researchers report that CDK inhibitors like palbociclib and ribociclib, initially developed for cancer therapy, show potential in treating neutrophilic inflammation-related conditions such as ARDS and psoriasis, although their clinical repurposing requires further research on safety and dose adjustments.

This study found that overexpression of sPLA2-IIA in homozygous mice resulted in cyclic alopecia, a halt in hair follicle cycling, and impaired wound healing due to complete loss of hair follicle stem cells.

This review highlights surprising similarities between hair follicles and antler units, suggesting that a comparative study of their biology could benefit understanding in both areas without presenting new empirical findings.

This case report highlights a successful treatment with granulocyte colony-stimulating factor for cyclic neutropenia in a 16-year-old girl experiencing recurring oral aphthae and fever.

This study synthesized and characterized new 2-hydroxypyrrolidine/piperidine derivatives using FeCl₃·6H₂O as a catalyst, but it reports no biological or clinical results.

In this study, the pharmacological action of dobutamine on rabbit retinae was found to be distinct from that of other dopamine analogs like apomorphine and N-methyl-dopamine.

Melatonin stops melanin production after tyrosinase action, with cyclic GMP mimicking this effect.

In this study, cyclic ADP-ribose (cADPR) treatment in human hair follicle dermal papilla cells was associated with increased intracellular calcium retention and activated anagen-related signaling without causing significant cytotoxicity, indicating its potential impact on hair growth processes.

This study found that for straight hair, friction mainly influences fragment formation during combing, suggesting no direct connection to tensile fatigue failure, while with textured hair, combing performance may be more complex.

This study found that a mathematical model predicts signaling heterogeneity in epithelial outer root sheath cells is necessary for hair follicles to maintain size and grow long hair fibers, supported by molecular experiments.

This study found that AtT-20 pituitary cells with higher cAMP-dependent kinase activity had larger calcium currents and significantly increased beta-endorphin release compared to cells with lower kinase activity.

This study found that epidermal growth factor significantly enhances the proliferation of hair follicle-derived mesenchymal stem cells through the EGFR/ERK and AKT pathways, without involving the STAT3 pathway.

This study found that CDK4/6 inhibitors in hormone-positive metastatic breast cancer were linked to increased risks of fatigue, alopecia, and stomatitis compared to placebo.

This study found that CDK4/6 inhibitors for HR+/HER2- advanced breast cancer are linked to typical adverse events such as fatigue and neutropenia, while also identifying unexpected reactions, highlighting potential safety concerns in their real-world use.

This study found that ablating cyclin D3 in a Ras-dependent skin carcinogenesis model increased apoptosis in hair follicles, reducing papilloma development but potentially facilitating malignant progression when CDK6 is overexpressed.

In this multicentric retrospective study, researchers reported that cutaneous adverse events were common among advanced breast cancer patients treated with cyclin-dependent kinase inhibitors (CDK4/6i), generally mild, and manageable with topical treatments, though in some cases, they led to treatment discontinuation.

This study found that altering cyclin-dependent kinase 4 (CDK4) levels in the bulge region of hair follicles affects the balance of stem cell numbers, potentially influencing hair follicle self-renewal and proliferation.

This study found that altering CDK4 expression in mice affects the population of keratinocyte stem cells, suggesting a correlation with susceptibility to skin papillomas.

This study suggests that diffuse alopecia areata initially involves an intense inflammatory attack during the anagen phase, progressing through different hair cycle stages with specific shedding patterns.

This study reported a rare case where a pheochromocytoma produced ACTH, leading to cyclic Cushing syndrome, and underscores the importance of considering this possibility in cases of ACTH-dependent hypercortisolism with an adrenal mass.

This study demonstrated that the highly divergent WDSV rv-cyclin significantly stimulates eukaryotic cell proliferation, leading to hyperplastic skin lesions in transgenic mice.

This study found that macrophages near hair follicles contribute to the activation of skin epithelial stem cells in mice, suggesting a novel role for macrophages in regulating hair growth.

In this study, researchers analyzed skin samples from Dorper sheep to identify 395 differentially expressed long non-coding RNAs (lncRNAs) linked to hair follicle growth phases, suggesting these lncRNAs may play a role in the regulation of hair shedding through pathways like estrogen and PI3K-Akt signaling.