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This study found that treating neonatal mice with the neurotoxin 6-OHDA resulted in temporary hair loss and thinner skin compared to control mice, linking sympathetic neurons to hair growth and skin thickness.

This review highlights that disturbances in neuroimmune communication, particularly between sympathetic nerves and macrophages, may contribute to autoimmune diseases like rheumatoid arthritis and type 1 diabetes, and suggests potential therapeutic avenues by restoring this communication in preclinical and early clinical studies.

Stress may affect hair growth by influencing hair follicle development and could contribute to hair loss.

This study found that stress-induced signaling from the sympathetic nervous system in mice led to the depletion of stem cells in hair follicles, resulting in premature greying.

This study found that sympathetic nerves and arrector pili muscles form a niche that modulates hair follicle stem cell activity, revealing their role in hair follicle regeneration.

This study found that subcutaneous injections of guanethidine or 6-hydroxydopamine induced premature hair growth in mice, suggesting a role for sympathetic nerves in hair growth control.

This review discusses recent advancements in understanding how the sympathetic nervous system and norepinephrine regulate hair follicle growth, highlighting innovative studies that explore their effects on hair follicle stem cells.

This study on C57BL/6 mice found that subcutaneous cholesterol injections significantly promoted hair regeneration by enhancing hair follicle stem cell proliferation, highlighting the role of the PKA-tyrosine hydroxylase-sympathetic nervous system pathway in this process.

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.

This review concluded that botulinum toxins have various potential off-label uses for dermatological conditions, but further research is needed to fully establish their efficacy and safety in these applications.

This review discusses the structural properties, pharmacological effects, and clinical applications of neurotoxins on synapses, reporting no new experimental results.

This chapter discusses the potential therapeutic applications of Botulinum toxin for various non-cosmetic skin conditions, such as acne, rosacea, and hyperhidrosis, highlighting case reports and some randomized controlled trials that indicate promise in alleviating discomfort, inflammation, and excessive sweating.

This review discusses neural mechanisms involved in hair growth control, focusing on piloneural interactions, but reports no clinical findings; the authors suggest further exploration for managing hair growth disorders.

5α-reduced progestogens may reduce mood issues and brain damage linked to HIV-1 Tat.

This review discusses the roles of peripheral nerves in stem cell and immune responses within the skin and hematopoietic system, emphasizing their potential in developing new therapies; it reports no new experimental results.

This study introduced a customizable ELISA for detecting antibodies against botulinum neurotoxin that matches or surpasses other tests in sensitivity and allows for more efficient and animal-friendly testing when combined with the hemidiaphragm assay.

This narrative review highlights that endurance, skill-oriented athletes, and physique-oriented competitors such as bodybuilders face accelerated degradation of fillers and botulinum neurotoxin due to elevated basal metabolic rates and other factors, and raised concerns about psychological conditions like body dysmorphic disorder in these populations.

This chapter reviews studies on the side effects of cytostatics and immunosuppressive drugs, detailing various toxicities such as cardiovascular, pulmonary, and neurotoxicity, but provides no new clinical results.

This study found that chemical sympathectomy inhibited hair follicle growth in mice, suggesting that sympathetic nerves may regulate keratinocyte behavior to promote hair growth.

This review discusses pharmacologic treatment options for muscle-related pain conditions and notes that there is strong evidence for the efficacy of tricyclic antidepressants and muscle relaxants in specific myofascial pain syndromes, but not universally.

This study found that minoxidil prevents long-term serotonergic toxicity induced by MDMA in rats, primarily by opening mitochondrial KATP channels and involving Akt and MAP kinases in its neuroprotective mechanism.

This study reports that patients with Alzheimer's disease have increased levels of polyamines in their hair.

This review detailed the types and mechanisms of injectable "skin boosters" and evaluated their effectiveness and safety for mitigating age-related skin changes, providing insight into their use in contemporary dermatological practice.

This review provides a comprehensive overview of melatonin's physiological roles, effects, and clinical implications, but it does not present new experimental findings.

This study provides evidence that psychoemotional stress inhibits hair growth in mice by affecting the brain-hair follicle axis, with specific neuropeptides and treatments modulating this effect.

This review discusses current and emerging treatments for benign prostatic hyperplasia and emphasizes the need for further research to optimize treatment selection, but reports no new clinical results.

This review discusses how acute exposures to environmental and internal stressors can quickly alter skin functions, leading to various dermatological symptoms, and calls for more research on these short-term effects.

This article reviews skin disorders in Parkinson's disease, highlighting the potential of skin studies and stem cell research to advance understanding and treatment of the neurodegenerative disorder, without presenting new results.

This book discusses various unanswered questions about headaches, including genetic factors, smartphone effects, and botulinum toxin's potential benefits for chronic migraines, but reports no new clinical findings.

This article reviews popular peptides used in cosmetics for wrinkle treatment and presents no new clinical findings.