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A clean, simplified medical study diagram for MDS exam on "Desquamative Gingivitis - Epithelial Adhesion Structures & Target Antigens". Layout in two sections: TOP SECTION - "Structural Arrangement" diagram showing layered epithelium from top to bottom: - Top layer: Suprabasal cells connected by DESMOSOMES (labeled with components: Desmogleins 1,3 + Desmocollins + Desmoplakins + Plakoglobin) - Middle: BASAL CELL LAYER - Bottom: BASEMENT MEMBRANE ZONE with 4 layers labeled: Basal keratinocyte layer ā†’ Lamina Lucida ā†’ Lamina Densa ā†’ Sublamina Densa - HEMIDESMOSOMES shown anchoring basal cells to basement membrane (labeled: BP1/BPAg1, BP2/BPAg2, Ī±6Ī²4 integrin, Laminin 5, Collagen VII) MIDDLE SECTION - Two color-coded boxes side by side: Left box (blue) "DESMOSOMES - Intercellular Adhesion": ā€¢ Desmogleins (Dsg 1, 3) - Cadherin superfamily ā€¢ Desmocollins ā€¢ Desmoplakins ā€¢ Plakoglobin ā€¢ Link via cytokeratins Right box (green) "HEMIDESMOSOMES - Cell-Basement Membrane": ā€¢ BPAg1 (BP1) & BPAg2 (BP2) ā€¢ Ī±6Ī²4 Integrin ā€¢ Laminin 5 & 6 ā€¢ Collagen Type VII ā€¢ Links to lamina lucida BOTTOM SECTION - Table "Antigens Targeted in Vesiculobullous Lesions": | Disease | Antigen Target | | Pemphigus Vulgaris | Desmoglein 1 & 3 | | Pemphigus Foliaceous | Desmoglein 1 only | | Paraneoplastic Pemphigus | Dsg 1,3 + Plakin proteins | | IgA Pemphigus | Dsg3, Desmocollin 1 & 2 | | Bullous Pemphigoid | BP180 & BP230 | | Cicatricial Pemphigoid | BPAg1/2, Laminin, Ī±6Ī²4-integrin, Collagen VII | | Epidermolysis Bullosa Acquisita | Type VII Collagen | | Dermatitis Herpetiformis | Tissue Transglutaminase | Memory aid box at bottom: "ABOVE Basement Membrane = Pemphigus (Desmoglein) | AT/BELOW Basement Membrane = Pemphigoid (BP antigens)" Clean white background, bold headings, color-coded boxes, clear arrows, suitable for exam revision

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Answer

Here is a fully simplified, exam-ready summary of that textbook page on Desquamative Gingivitis / Epithelial Adhesion Structures:

šŸ—ļø Structural Arrangement of Oral Epithelium

SUPRABASAL CELLS
      |
   [DESMOSOMES] ā† intercellular adhesion
      |
BASAL CELL LAYER
      |
   [HEMIDESMOSOMES] ā† cell to basement membrane
      |
ā”ā”ā”ā”ā”ā”ā”ā”ā”ā”ā”ā”ā”ā”ā”ā”ā”ā”ā”ā”ā” BASEMENT MEMBRANE ZONE ā”ā”ā”ā”ā”ā”ā”
  Layer 1: Basal Keratinocyte layer
  Layer 2: Lamina Lucida
  Layer 3: Lamina Densa
  Layer 4: Sublamina Densa (superficial papillary dermis)
      |
   Anchoring Fibrils ā†’ Connective Tissue

šŸ”— DESMOSOMES (Intercellular Adhesion)

ComponentDetail
Desmogleins (Dsg)Dsg 1, 2, 3, 4 - cadherin superfamily glycoproteins
DesmocollinsCadherin superfamily
DesmoplakinsLink to cytokeratins
PlakoglobinPlaque-associated protein
In skin: Dsg 1 & 3 expressed In oral epithelium: Dsg 3 preferentially expressed

šŸ”© HEMIDESMOSOMES (Cell-Basement Membrane)

ComponentOther Name
BPAg1BP1 / Bullous pemphigoid antigen 1
BPAg2BP2 / Bullous pemphigoid antigen 2
Ī±6Ī²4 Integrinā€”
Laminin 5 & 6ā€”
Unceinā€”
Collagen Type VII & IVā€”
Role: Links keratinocyte cytoskeleton to lamina lucida

šŸŽÆ Target Antigens in Vesiculobullous Lesions (Table 26.1)

DiseaseAntigen Targeted
Pemphigus VulgarisDesmoglein 1 & 3
Pemphigus FoliaceousDesmoglein 1 only
Paraneoplastic PemphigusDsg 1 & 3 + Plakin proteins
IgA PemphigusDsg3, Desmocollin 1 & 2
Pemphigus HerpetiformisDesmoglein 1
Cicatricial PemphigoidBPAg1/2, Laminin V/VI, Ī±6Ī²4-integrin, Ī²4-integrin, Collagen VII
Bullous PemphigoidBP 180 & 230
Epidermolysis Bullosa AcquisitaType VII Collagen
Epidermolysis Bullosa SimplexKeratin 5 & 14
EB JunctionalLaminin 5 + Type XVII Collagen
EB DystrophicType VII Collagen
Erythema MultiformeDesmoplakins
Dermatitis HerpetiformisTissue Transglutaminase

āš” High-Yield Memory Tricks

RuleMnemonic
Pemphigus = above BM, intraepithelial blisterTarget = Desmogleins (intercellular)
Pemphigoid = below BM, subepithelial blisterTarget = BP antigens / Hemidesmosomes
PV targets Dsg 1 + 3"Vulgaris = 1+3"
PF targets Dsg 1 only"Foliaceous = skin only (superficial)"
BP targets BP180 + BP230Numbers to memorize directly
Dermatitis HerpetiformisTissue Transglutaminase (not desmoglein!)

šŸ“¦ Basement Membrane Contents (Know More Box)

LayerContents
Lamina LucidaLaminin 332, anchoring filaments
Lamina DensaCollagen IV, Laminins 332/311/511, Nidogen, Perlecan
Sublamina DensaAnchoring fibrils = Collagen VII
Basal keratinocytes containKeratin filaments, BP1 & BP2, Plectin, Ī±6Ī²4 integrin, Ī±3Ī²1 integrin, Collagen XVII, CD151
This covers everything tested in MDS exams from this chapter - structures, components, and disease-antigen correlations.

I need simplified image

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A clean medical study diagram for MDS exam. White background. Title at top: "Desquamative Gingivitis - Epithelial Adhesion & Target Antigens" SECTION 1 (top left): Simple cross-section diagram of epithelium layers from top to bottom: - Row of pink cells labeled "Suprabasal cells" connected by spiky junctions labeled "DESMOSOMES" - Row of pink cells labeled "Basal cell layer" - Spiky connections downward labeled "HEMIDESMOSOMES" - Orange horizontal band labeled "Basement Membrane" - Sub-labels on right side of band: "Lamina Lucida / Lamina Densa / Sublamina Densa" - Brown roots below labeled "Anchoring fibrils (Collagen VII)" SECTION 2 (top right): Two colored boxes side by side Blue box titled "DESMOSOMES": - Desmogleins (Dsg 1,2,3,4) - Desmocollins - Desmoplakins - Plakoglobin - Links via cytokeratins Green box titled "HEMIDESMOSOMES": - BPAg1 (BP1) - BPAg2 (BP2) - alpha-6-beta-4 Integrin - Laminin 5 and 6 - Collagen VII SECTION 3 (bottom): Table titled "TARGET ANTIGENS in Vesiculobullous Lesions" Two columns: Disease | Antigen Pemphigus Vulgaris | Desmoglein 1 and 3 Pemphigus Foliaceous | Desmoglein 1 only Paraneoplastic Pemphigus | Dsg 1, 3 + Plakin proteins IgA Pemphigus | Dsg3 + Desmocollin 1 and 2 Bullous Pemphigoid | BP 180 and 230 Cicatricial Pemphigoid | BPAg1/2, Laminin, alpha6-beta4 integrin, Collagen VII Epidermolysis Bullosa Acquisita | Type VII Collagen Dermatitis Herpetiformis | Tissue Transglutaminase SECTION 4 (bottom strip): Yellow highlighted memory box: "PEMPHIGUS = Above BM = Intraepithelial = TARGET: Desmogleins" "PEMPHIGOID = Below BM = Subepithelial = TARGET: BP antigens / Hemidesmosomes"

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