Quiz Welcome to your Quiz Name Institute Email Phone City IADVL / SES membership number Which ceramide subclass is covalently bound to involucrin on the cornified envelope to establish the cornified lipid envelope (CLE) scaffold? Cer[NP] Cer[EOS] Cer[AS] Cer[NS] None In the stratum granulosum, which tight junction protein is directly downregulated by IL-4 and IL-13, leading to enhanced antigen penetration? Claudin-1 Claudin-5 Desmoglein-1 Corneodesmosin None Which epidermal-specific ceramide synthase is suppressed by Th2 cytokines (IL-4/IL-13), impairing the synthesis of very long-chain ceramides (C24–C32)? CerS1 CerS2 CerS3 CerS6 None Which cytokine acts predominantly through the IL-31RA/OSMR complex on sensory neurons to serve as the primary mediator of pruritus in AD? IL-22 IL-31 IL-17A IL-10 None How does elevated stratum corneum pH secondary to filaggrin deficiency alter enzymatic barrier homeostasis? Inhibits kallikrein-5 and activates LEKTI Activates acid sphingomyelinase and beta-glucocerebrosidase Inhibits beta-glucocerebrosidase and promotes unrestrained KLK5/KLK7 activity Upregulates ABCA12 lipid loading None In lipidomic analysis of AD stratum corneum, which shift in ceramide chain length distribution is typically observed? Selective increase in C24–C26 ceramides with depletion of C16–C18 ceramides Selective reduction in long-chain ceramides (C24–C26) with a relative increase in short-chain ceramides (C16–C18) Uniform elevation of all ceramide chain lengths Complete loss of short-chain ceramides only None What distinguishes intrinsic AD from extrinsic AD immunologically and clinically? Intrinsic AD shows high total serum IgE with purely Th1-mediated inflammation Intrinsic AD presents with normal serum IgE levels and mixed Th2/Th1/Th17 cytokine activation Intrinsic AD accounts for 70–80% of all atopic dermatitis cases Intrinsic AD exhibits intact filaggrin expression and zero TEWL elevation None According to the "bricks and mortar" model of the stratum corneum, what proportion of total intercellular lipid mass is comprised of ceramides? Roughly 10% Roughly 25% Roughly 50% Roughly 85% None In the sphingomyelin hydrolysis pathway, which enzyme hydrolyzes lamellar body-derived sphingomyelin into ceramide in the stratum corneum extracellular space? Serine palmitoyltransferase (SPT) Acid sphingomyelinase (aSMase) Beta-glucocerebrosidase (GBA) Transglutaminase-1 None In pediatric AD patients with loss-of-function FLG mutations, barrier disruption is characterized by which immune polarization in the stratum corneum compared to adult AD? Th1-predominant environment Th17-enriched environment Pure Th22 environment without Th2 involvement Complete suppression of all adaptive immune axes None 1 out of 2 Which diagnostic presentation is recognized as the most distinctive phenotypic manifestation of AD in Fitzpatrick IV–VI Indian patients? Confluent, bright salmon-pink erythema over extensor surfaces Follicular papules centered on hair follicles, often misdiagnosed as keratosis pilaris or folliculitis Severe generalized bullous eruptions Pitted keratolysis with geographic erythema None Why do non-sedating H1 antihistamines consistently fail to control chronic pruritus in atopic dermatitis? AD itch is primarily non-histaminergic, mediated by mediators such as IL-31, TSLP, and PAR-2 activation H1 receptors are absent in dark skin phenotypes Histamine is neutralized by stratum corneum proteases before receptor binding Mast cells undergo apoptosis in chronic AD lesions None What is the scientifically validated physiological molar ratio of ceramides to cholesterol to free fatty acids required for barrier repair therapy (BRT)? 1:1:1 3:1:1 1:3:1 5:2:1 None In the IADVL STAND AD 2024 consensus, which agent is recommended as the first-line conventional systemic immunosuppressant for moderate-to-severe AD in India? Azathioprine Methotrexate Cyclosporine (2.5–5 mg/kg/day) Mycophenolate mofetil None Which screening test is preferred prior to initiating targeted biologics or JAK inhibitors in BCG-vaccinated Indian patients? Tuberculin skin test (Mantoux) Interferon-Gamma Release Assay (IGRA / QuantiFERON-TB Gold) Serum IgE level Patch testing with PPD None Which biological mechanism explains why topical emollient application within 3 minutes of bathing provides rapid itch relief prior to anti-inflammatory onset? Direct competitive inhibition of H1 receptors on mast cells Immediate suppression of keratinocyte alarmin TSLP release, blocking TRPA1+ sensory nerve activation Cleavage of neuronal IL-31RA receptors Selective degradation of substance P None What dual therapeutic benefit does niacinamide provide in advanced emollient formulations for Indian patients with AD? Upregulates filaggrin/ceramide synthesis and inhibits melanosome transfer to reduce PIH Inhibits Janus kinase-1 and replaces free fatty acids directly Acts as an occlusive wax while bleaching normal skin tones Destroys S. aureus cell walls and prevents sweat production None Which traditional oil is supported by RCT evidence for reducing SCORAD and S. aureus colonization in pediatric AD, contrasting with barrier-disruptive mustard and olive oils? Pure Mustard oil Refined Olive oil Virgin Coconut oil Castor oil None What is the recommended emollient quantity that should be prescribed weekly for an adult patient with atopic dermatitis? 50–100 g/week 100–200 g/week 250–500 g/week 750–1000 g/week None Which targeted agent holds CDSCO approval for Indian AD patients aged 6 months and older and demonstrated a 68% EASI-75 response at 6 months in Indian real-world data? Upadacitinib Abrocitinib Tralokinumab Dupilumab None 2 out of 2 Previous Start Quiz Next Time's up Leave a Reply Cancel replyCommentEnter your name or username to comment Enter your email address to comment Enter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
