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This review discusses the multi-system impacts of polycystic ovary syndrome and explores evaluation and treatment strategies, but it reports no new research findings.

This article provides an overview of treatment options for hirsutism, summarizing both pharmacologic and non-pharmacologic approaches, but reports no new clinical results.

This source discusses how radiotherapy-induced skin fibrosis, a chronic side effect affecting cancer survivors' quality of life, is driven by ongoing inflammation and fibroblast activity, and emphasizes the need for comprehensive dermatologic management and better diagnostic tools.

This source describes the fourth volume of the "Guía de Procedimientos en Cirugía Plástica Reconstructiva" as an essential, expert-compiled reference detailing the latest advanced techniques in reconstructive plastic surgery for surgeons, residents, and professionals in the field.

This study found that 6 months of Low-Level-Laser Therapy significantly increased overall hair density, particularly Vellus hair density, in women with hormonal, age-related hair loss.

This article discusses the Columbia Manual of Dermatologic Cosmetic Surgery but provides no research results.

This study identified two evolutionarily conserved ultra-high-sulfur keratin proteins in human and sheep hair follicles, which are specifically expressed in the hair cuticle during the late stages of fiber development.

This study identified genetic, biological, and technical factors that influence circRNA expression in the human brain, connecting these factors to potential genetic risk for diseases like schizophrenia and type II diabetes.

This study reports that structural abnormalities in the inner root sheath of hair follicles may cause the hair shaft to be loosely attached in patients with loose anagen hair syndrome.

This study suggests that human keratin fiber matrix has a well-defined nano-scale grainy structure rather than being amorphous, with grain size influenced by chemical treatments, temperature, humidity, and follicle-level factors.

This study suggests that the cell membrane complex in hair cuticles contains hydrophilic regions with disulfide bonds allowing polymer uptake and hydrophobic lamella-like lipid layers.

This study identified two high sulfur protein genes, B2E and B2F, in rats, which are expressed in hair cortical cells during anagen and contribute to hair fiber production.

In this study using guinea pigs, the low-dose 800 nm semiconductor laser was found to effectively treat skin blackheads and coarse pores by promoting hair follicle cell apoptosis, while maintaining PCNA expression levels in sebaceous glands.

Junctional proteins stabilize the inner root sheath and connect the companion layer in human hair.

In this study, researchers developed an enhanced rodent model of trigeminal neuralgia, demonstrating that structural and functional changes in the anterior cingulate cortex are linked to chronic pain and emotional disturbances, and chemogenetic inhibition of specific neurons could alleviate symptoms.

This study characterized a new human keratin, hK6irs1, specifically found in the inner root sheath of hair follicles, which suggests its role in the structural integrity and guidance of growing hair shafts.

This study identified a new cytokeratin, mK6irs, specifically expressed in the inner root sheath of mouse hair follicles, distinguishing it as a member of the type II cytokeratin family.

This study found that age-related hair thinning in Caucasian women over 50 involves significant structural changes within the hair follicle, suggesting an "aged hair program" rather than just producing thinner hairs.

This study observed defects in hair cuticle cross-linking in some, but not all, mouse mutants with sparse or structurally unsound hair.

This research highlights the key interactions of hair cosmeceuticals, focusing on their effects on the hair fiber surface, cuticle, and cortex, which are crucial for protection and mechanical strength, particularly in damaged hair.

This study found that while molecular hair structures were nearly identical across individuals, genetic factors seem to influence specific lipid compositions, as seen in identical-patterned hair from parent-child pairs and identical twins, but not fraternal twins.

This study investigated the immunohistochemical characteristics of keratin proteins in epidermal appendages, finding variable staining patterns in different skin structures and tumor cells, which suggests differences in keratinization.

This study found that shikimic acid- and maleate-based hair repair agents modified the structure of hair fibers, though they did not increase disulfide bridge content in the hair cortex.

This study examined the cytodifferentiation stage of hair follicle development in cashmere goats, identifying nine cell populations and key regulatory pathways, including transcription factors and keratin genes, that may influence fiber quality and inform breeding strategies.

This chapter reviews the science and technology of hair fiber, exploring its composition, the impact of genetics and environmental factors, and recent advancements in hair care products, but presents no new research findings.

Different keratin proteins are expressed in various epithelial cells at different stages, affecting cell structure and function.

Hair differentiation starts earlier than thought, involving multiple type-II keratins.

In this study, the researchers identified the specific subcellular localization of the protein S100A3 in the endocuticle and cortex of human hair shafts.

This study found that the orphan protein Plet-1 is expressed in specific keratinocytes of mouse hair follicles and may regulate keratinocyte interactions with inert tissues by affecting migration and adhesion.

In this study, researchers observed that cosmetic peroxide bleaching causes oxidative damage and protein loss in human hair, not only affecting the cuticle but also deeper cortical structures, correlating with bleaching severity.