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This study concluded that cytokines and growth factors significantly regulate hair growth in vitro, with some completely inhibiting growth, such as EGF and TNFα.

This study found that red ginseng oil may enhance hair growth and protect skin from UV damage in mouse models by promoting regenerative processes and reducing inflammation.

This study found that HB-EGF and TGF-α work together to stimulate wound healing in a murine model of thermal injury, with peak keratinocyte proliferation observed by postburn day five.

Growth factors can either promote or inhibit hair follicle cell growth and collagen breakdown.

This study found that C. obtusa oils promoted hair growth in shaved mice and increased the expression of a hair growth regulator, VEGF, in a cell line.

This study found that dihydrotestosterone (DHT) suppresses prostaglandin E2 and TGF-β induced IGF-I gene promoter activity in osteoblasts, suggesting complex interactions among bone growth regulators and potential complications from anabolic steroid use.

This article discusses the early development of hair follicles with a focus on the formation of epidermal thickenings called placodes, reporting no new experimental results.

This study reported that the use of composite RGDmix hydrogel improved the survival and proliferation of human amniotic mesenchymal stem cells and increased growth factor expression, enhancing wound healing through the RGDSP/integrin αv/PI3K/AKT signaling pathway.

This article discusses the concept of telogen effluvium, introduced in 1961, characterized by diffuse scalp hair loss due to various triggers, and reports no new clinical findings.

This study found that treatment with EGFR inhibitors or mitogen-activated kinase inhibitors may compromise the immune privilege of human scalp hair follicles, suggesting new directions for managing drug-induced folliculitis.

In this study, fish-derived collagen hydrolysate from tilapia scales improved hair growth and skin health in both cellular and mouse models, reducing oxidative stress and inflammation while enhancing hair quality and promoting beneficial gene expression.

This study found that administering lower doses of sodium pentaborate pentahydrate increased hair growth in rats via specific molecular pathways, while a higher dose suppressed these pathways and impaired hair growth.

In this study, researchers found that the variability in growth factor expression, particularly TGFβ1, in PRP samples could influence patient responses to hair loss treatment with PRP therapy.

This review examines how growth factors and cytokines influence mammalian hair growth and highlights the impact of their dysregulation, but it presents no new experimental findings.

In this study, researchers developed a new method called Enriched-GF, which enhances growth factor recovery from platelet concentrates through a combination of glass bead activation, freeze-thaw cycling, and calcium stimulation, outperforming conventional methods by providing higher and more consistent yields for regenerative medicine applications.

This review investigates how various intrinsic factors—such as growth factors, cytokines, chemokines, and interferons—regulate hair growth through evidence gathered from in vitro and in vivo studies, highlighting the need for further research in human subjects to validate these findings.

This study examined proteomic changes in Inner Mongolia cashmere goat skin, finding 631 proteins differentially regulated during hair growth stages; key keratin proteins, crucial for hair follicle development, were localized in secondary hair follicles.

In this case report, a 36-year-old woman with systemic lupus erythematosus and alopecia related to discoid lupus erythematosus showed hair regrowth following treatment with concentrated growth factor, suggesting its potential as a cosmetic therapy for DLE.

This study found that garlic exosomes induced hair growth in rats by increasing anagen follicle counts and activating multiple signaling pathways, including Wnt-1, β-catenin, and TGF-β1.

This study found that 4-aminopyridine significantly enhanced skin wound healing by accelerating wound closure, improving skin architecture, and promoting hair follicle neogenesis and tissue regeneration.

This study found that epidermal growth factor receptor inhibitors used in cancer treatment induce a distinct inflammatory response in hair follicles, marked by immune privilege collapse and upregulation of inflammatory pathways.

Higher levels of certain nerve-related proteins are linked to hair loss in women with scalp pain.

Different substances affect hair and skin cell growth in various ways.

This study reported that paracrine factors, such as IGF-I and SCF, were reduced in balding hair follicles compared to non-balding ones, while inhibitory factors like TGFß-1 were increased, providing insights into the androgen action in hair follicles.

This study successfully grew and maintained human hair follicles in vitro, noting that TGF-β1 negatively affects growth, while EGF replicates hair-removal effects seen in animals.

In this study, the researchers developed an in vitro model that maintains human hair follicles to grow at in vivo rates and observed that factors like EGF and IGF-I influence hair follicle growth and catagen entry.

Hair growth is influenced by interactions between skin layers, growth factors, and hormones, but the exact mechanisms are not fully understood.

In this study, insulin-like growth factor-1 did not impact hair follicle elongation in rat pelage hair follicles, while transforming growth factor-beta 1 inhibited both elongation and thymidine uptake.

This study found that IGF-1 injections increased hair follicle number and growth phase duration in wild-type mice, suggesting potential for baldness treatment.

This study found that insulin-like growth factor-I and hepatocyte growth factor increased the chemotactic migration of human hair outer root sheath cells, suggesting these factors have both growth stimulatory and chemotactic effects.