Resumen
Objetivo: Analizar los principales mecanismos fisiopatológicos de la dermatitis atópica desde una perspectiva neuroinmune, enfatizando la interacción entre disfunción de la barrera epidérmica, inflamación crónica mediada por respuestas Th2 y vías del prurito neurógeno, además del papel regulador del endocannabinoidoma y la modulación por cannabidiol. Revisión de la literatura: La dermatitis atópica resulta de la disfunción de la barrera cutánea, la hiperreactividad inmunológica y alteraciones neuroinmunes que perpetúan el prurito crónico. Citocinas como IL‑4, IL‑13 e IL‑31 comprometen la barrera epidérmica e intensifican la inflamación, mientras mediadores neurógenos amplifican la sensibilización periférica y central. El endocannabinoidoma es un sistema regulador formado por mediadores lipídicos, enzimas y receptores, incluidos TRP, PPARγ y GPR55, que modulan inflamación, diferenciación epidérmica y señalización pruritogénica. El cannabidiol regula indirectamente este sistema mediante modulación de CB1, interacción con CB2 e inhibición parcial de FAAH, favoreciendo el control de procesos inflamatorios y neuroinmunes. Consideraciones finales: El endocannabinoidoma constituye un marco relevante para comprender la relación entre inflamación, barrera epidérmica y prurito. El cannabidiol presenta potencial terapéutico prometedor, aunque aún existen lagunas científicas que exigen investigaciones más rigurosas.
Referencias
BÍRÓ T, et al. Endocannabinoids and the skin. Trends in Pharmacological Sciences, 2009; 30, 411–420.
BISOGNO T, et al. Molecular targets for cannabidiol and its synthetic analogues: effect on vanilloid VR1 receptors and on the cellular uptake and enzymatic hydrolysis of anandamide. British Journal of Pharmacology, 2001,134, n. 4,845–852.
BRANDT EB, SIVAPRASAD U. Th2 cytokines and atopic disease. Journal of Clinical & Cellular Immunology, 2011; 2, 110–118.
CHUNG H, et al. Cannabidiol binding and negative allosteric modulation at the cannabinoid type 1 receptor in the presence of delta-9-tetrahydrocannabinol: An In Silico study PloS one 2019,14.7: e0220025.
CRIADO PR. Dermatite atópica: atualização em imunopatogênese. Anais Brasileiros de Dermatologia, 2024; 99,1,1–15.
D'AVINO P, et al. Distinct Roles of IL‐4, IL‐13, and IL‐22 in Human Skin Barrier Dysfunction and Atopic Dermatitis. Allergy, 2025.
DE PETROCELLIS L, et al. Effects of cannabinoids and cannabinoid‑enriched Cannabis extracts on TRP channels and endocannabinoid metabolic enzymes. British Journal of Pharmacology, 2012; 161: 1494–1504.
DI MARZO V, PISCITELLI F. The endocannabinoid system and its modulation by phytocannabinoids. Neurotherapeutics, 2015; 12, n. 4, 692-698.
EICHENFIELD LF, et al. Atopic dermatitis: epidemiology and pathogenesis. Journal of the American Academy of Dermatology, 2014; 70, 338–351.
EICHENFIELD LF, et al. IL-31 and pruritus. Journal of Allergy and Clinical Immunology, 2017;140, 605–614.
ELIAS PM. Lipid abnormalities and lipid-based repair strategies in atopic dermatitis. Biochimica et Biophysica Acta (BBA)-Molecular and Cell Biology of Lipids, 2014; 1841, n.3, 323-330.
ELIAS PM, STEINHOFF M. Outside-to-inside (and now back to “outside”) pathogenic mechanisms in atopic dermatitis. Journal of Investigative Dermatology, 2008, 128 n.5, 1067-1070.
GUTTMAN‐YASSKY E, et al. Systemic immune mechanisms in atopic dermatitis and psoriasis with implications for treatment. Experimental dermatology, 2018, 27 n.4, 409-417.
HOWELL MD, et al. Th2 cytokines act on S100/A11 to downregulate keratinocyte differentiation. Journal of Investigative Dermatology, 2008; 128 n.9, 2248-2258.
IANNOTTI FA, DI MARZO V. The gut microbiome, endocannabinoids and metabolic disorders. Journal of Endocrinology, 2021;248, 2, R83-R97.
IKOMA A, et al. The neurobiology of itch. Nature reviews neuroscience, 2006, 7 n.7, 535-547.
KIM J, et al. Skin barrier dysfunction. Experimental Dermatology, 2019; 28, 123–131.
KLEIN TW. Cannabinoid-based drugs as anti-inflammatory therapeutics. Nature Reviews Immunology, 2005; 5.5: 400-411.
KONG HH, et al. Temporal shifts in the skin microbiome associated with disease flares and treatment in children with atopic dermatitis. Genome research, 2012, 22.5: 850-859.
LEO R, et al. The Neurogenic Inflammation Mediator Endothelin‐1 Causes Human Skin Barrier Disruption in Atopic Dermatitis via an ETAR/TRPA1‐Axis. Allergy (2025).
LEUNG DYM, BIEBER T. Atopic dermatitis. The Lancet, 2003; 361,151–160.
LEUNG DYM, GUTTMAN-YASSKY E. Deciphering atopic dermatitis. Journal of Allergy and Clinical Immunology, 2014; 134, 769–779.
LEUNG DYM. et al. Skin barrier dysfunction. Journal of Allergy and Clinical Immunology, 2021; 148, 1–8.
MACCARRONE M, et al. Endocannabinoid signaling at the periphery: 50 years after THC. Trends in pharmacological sciences, 2015; 36, n.5, 277-296.
MACCARRONE M, et al. Goods and bads of the endocannabinoid system as a therapeutic target: lessons learned after 30 years. Pharmacological reviews, 2023, 75, n 5: 885-958.
NAKATSUJI T, et al. Antimicrobials from human skin commensal bacteria protect against Staphylococcus aureus and are deficient in atopic dermatitis. Science translational medicine, 2017; 9.378 eaah4680.
NOGRALES KE, et al. IL-22–producing “T22” T cells account for upregulated IL-22 in atopic dermatitis despite reduced IL-17–producing TH17 T cells. Journal of Allergy and Clinical Immunology, 2009; 123, n.6, 1244-1252.
O’SULLIVAN SE. An update on PPAR activation by cannabinoids. British Journal of Pharmacology, 2016; 173, 12, 1899–1910.
OETJEN LK, et al. Sensory neurons co-opt classical immune signaling pathways to mediate chronic itch. Cell, 2017; 171(1): 217-228.
PIOMELLI D, TAGNE AM. Endocannabinoid-based therapies. Annual Review of Pharmacology and Toxicology, 2022, 62: 483-507.
RYBERG E, et al. The orphan receptor GPR55 is a novel cannabinoid receptor. British Journal of Pharmacology, 2007, 152(7): 1092–1101.
SONKOLY E, et al. IL-31: a new link between T cells and pruritus in atopic skin inflammation. Journal of Allergy and Clinical Immunology, 2006; 117.2: 411-417.
STÄNDER S, LUGER TA. Itch in atopic dermatitis—pathophysiology and treatment. Acta Dermatovenerologica Croatica, 2010,18 n.4.
SHIMADA Y, et al. Transepidermal water loss. Skin Research and Technology, 2009;15, 305–310.
STEINHOFF M, et al. Role of vasculature in atopic dermatitis. Journal of allergy and clinical immunology, 2006; 118.1: 190-197.
TOMINAGA M, TAKAMORI K. Itch and nerve fibers with special reference to atopic dermatitis: therapeutic implications. The Journal of dermatology, 2014, 41.3: 205-212.
TÓTH BI et al. Endocannabinoid signaling in skin. Trends in Pharmacological Sciences,2011; 32, 554–563.
TÓTH BI, et al. Cannabinoid receptors in skin homeostasis. Experimental Dermatology, 2019; 28, 1–9.
WILSON SR, et al. TSLP and itch. Cell, 2013;155, 285–295.
YANG X et al. Molecular mechanism of allosteric modulation for the cannabinoid receptor CB1.Nature Chemical Biology, 2022, 18 n 8: 831-840.
