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This study found that inducing miR-205 reduces actin contractility and stiffness in hair follicle stem cells and progenitors, stimulating hair regeneration in both young and old mice.

Pili annulati is caused by a protein metabolism disorder affecting hair structure.

This study suggests that the anchorage of the arrector pili muscle to the extracellular matrix is likely mediated by α5β1 integrin, with α1β1 integrin involved in muscle cell-cell adhesion.

This study reported that X-ray microscopy provides more intact images of hair's internal structure compared to transmission electron microscopy, particularly for observing fine details like cuticle coarsening and cortex cracks.

In this study, researchers found that circulating exosomes from different sheep breeds can significantly alter hair growth in mice, with the source of exosomes influencing hair follicle size and hair diameter, as well as expression of specific hair growth and melanin synthesis markers.

In this study, a "frequent profile" of hair proteins was observed in 180 of 182 individuals, showing consistent electrophoretic bands characteristic of keratins, with rare deviations in two samples.

In this study, the researchers found that a manual micrometer caliper is a reliable tool for planning hair transplant surgery and accurately measures the short axis of the hair shaft.

This study describes how shotgun proteomics can identify over 300 proteins in hair shafts, potentially allowing for the diagnosis of diseases through noninvasive human proteome sampling.

Scientists identified and cloned specific keratin proteins in mouse hair.

This research analyzed two ancient mammoth hair strands and reported distinct structural and elemental differences, including calcium, iron, and copper deposits, which vary with age and origin.

This study observed varying levels of polyamines in different compartments of rat hair follicles, indicating their potential involvement in hair growth, especially in the matrix and inner root sheath layers.

This study found that keratin filament networks in SG1 cells of mice undergo dynamic changes during cornification, impacting the barrier function of the stratum corneum.

This study suggests that the mechanical robustness of hair may be enhanced by the binding interactions of keratin-associated proteins, particularly KAP8.1, with intermediate filament proteins.

In this study, topical application of α-methylspermidine during the telogen phase in mice induced hair growth by increasing the polyamine pool and mimicking the anagen phase's characteristics.

This study found that extracellular vesicles from low-passage dermal papilla cells may activate hair growth by delivering miR-140-5p, which downregulates BMP2 signaling, suggesting potential therapeutic targets for alopecia.

Proteomic analysis can identify genetic differences in mouse hair, helping understand hair defects and variations.

This study used Scanning Electron Microscopy to analyze South American mummy hair, revealing high levels of sulfur, calcium, and potassium, highlighting SEM's utility in anthropological investigations.

This study found that human dermal papilla cells are surrounded by a basement membrane-like extracellular matrix, which maintains their aggregated structure without strong cell‒cell contacts.

In this study, autophagy was commonly observed during keratinization in neonate rat hair follicles, suggesting lysosomal proteases and cytoplasmic enzymes may coordinate in hair follicle cell differentiation.

This study found that dermal papilla cells exhibit stage-dependent variation in histone methylation during the hair follicle cycle and display distinct chromatin marker expression when transitioning to in vitro culture.

This study used electron microscopy to characterize tissues on telogen hair roots, finding that tissue quality, including nucleated and nonnucleated epithelial cells, may play a crucial role in DNA typing for forensic analysis.

This study explored the role of nine specific miRNAs in human hair follicles, revealing significant miRNA/mRNA correlations for miR-24, miR-31, and miR-106a and identifying target genes involved in hair biology.

This study suggests that the expression patterns of keratin and filaggrin indicate milia may originate from the outermost cells of the hair bulge in the outer root sheath.

In this study, transcutaneously applied nanoparticles and viral vectors were shown to penetrate murine hair follicles, internalize in antigen-presenting cells, and induce immune responses, suggesting a promising approach for vaccine delivery.

In this study, epithelial cell-derived exosomes promoted fibroblast migration and inhibited their proliferation, suggesting a role in dermal condensate formation and hair follicle morphogenesis in cashmere goats.

This review discusses the evolution and development of smart and multifunctional microneedles, highlighting their potential future importance in medical applications, but it reports no new experimental results.

This study observed that the catagen phase in hairless mice displayed a slower shortening of the mutant epithelial column, resulting in longer total follicle length and abnormalities in the connective tissue sheath and glassy membrane.