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Related Concept Videos

Desmosomes01:05

Desmosomes

The term desmosome derives from the Greek words "desmo" and "soma" meaning "adhesion bodies." This structure was first observed during the late 1800s and described as small, dense nodules in the epidermis. Desmosomes are button-like structures that help form an interlinked network of intermediate filaments across the cells. These junctions are  essential to hold cells together under mechanical stress and to maintain tissue integrity. Desmosomes are multi-protein complexes comprising desmosomal...
Gastritis-II: Pathophysiology01:17

Gastritis-II: Pathophysiology

Gastritis is marked by disruption of the mucosal barrier that usually protects the stomach tissue from digestive juices and manifests in acute and chronic forms.
In acute gastritis, the gastric mucosa becomes swollen and red and undergoes superficial erosion. Superficial ulceration may lead to bleeding.
In chronic gastritis, persistent or repeated insults lead to chronic inflammatory changes and, eventually, thinning or atrophy of the gastric tissue.
Gastritis can stem from various causes, each...
Peptic Ulcer01:27

Peptic Ulcer

Peptic ulcers are erosive lesions of the gastric or duodenal lining, most commonly caused by Helicobacter pylori infection. This Gram-negative, helical bacterium has adapted to survive the stomach’s acidic environment by producing urease, which converts urea into ammonia and carbon dioxide. The ammonia neutralizes gastric acid in the bacterium’s immediate environment, allowing colonization of the gastric mucosa. H. pylori attaches to mucus-secreting epithelial cells, penetrates the mucus...
Papillary Dermis01:11

Papillary Dermis

Dermis
The dermis might be considered the "core" of the integumentary system, as distinct from the epidermis and hypodermis. It contains blood and lymph vessels, nerves, and other structures, such as hair follicles and sweat glands. The dermis is made of two layers of connective tissue that comprise an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts.
Papillary Layer
The papillary layer is made of loose, areolar connective tissue, which means the collagen and...
Peptic Ulcer Disease II: Pathophysiology01:24

Peptic Ulcer Disease II: Pathophysiology

Peptic ulcer disease develops when protective mechanisms of the gastrointestinal mucosa are overwhelmed by harmful factors, leading to localized erosions in the stomach or proximal duodenum. The main causes are Helicobacter pylori infection and chronic use of nonsteroidal anti-inflammatory drugs (NSAIDs).Helicobacter pylori–Induced InjuryBacterial Adaptation and Colonization:H. pylori is a spiral, Gram-negative bacterium adapted to the acidic stomach. and transmitted through oral-oral or...
Skin Cancer01:30

Skin Cancer

Skin cancer is a type of cancer that occurs when there is an abnormal growth of skin cells, usually triggered by damage to the DNA within the skin cells. It is primarily caused by exposure to ultraviolet (UV) radiation from the sun or artificial sources like tanning beds. Skin cancer is the most common type of cancer worldwide, and its incidence continues to rise.
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...

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Related Experiment Video

Updated: May 31, 2026

Technique of Conjunctival Biopsy and Direct Immunofluorescence for Diagnosing Mucous Membrane Pemphigoid
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Technique of Conjunctival Biopsy and Direct Immunofluorescence for Diagnosing Mucous Membrane Pemphigoid

Published on: June 17, 2025

IgA pemphigus.

Daisuke Tsuruta1, Norito Ishii, Takahiro Hamada

  • 1Department of Dermatology, Kurume University School of Medicine, and Kurume University Institute of Cutaneous Cell Biology, 67 Asahimachi, Kurume, Fukuoka 830-0011, Japan.

Clinics in Dermatology
|June 18, 2011
PubMed
Summary

IgA pemphigus is a rare autoimmune blistering disease where IgA antibodies attack skin cells. This review details its types, clinical features, and current understanding for better diagnosis and treatment.

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Granulocyte-dependent Autoantibody-induced Skin Blistering
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Granulocyte-dependent Autoantibody-induced Skin Blistering

Published on: October 12, 2012

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Technique of Conjunctival Biopsy and Direct Immunofluorescence for Diagnosing Mucous Membrane Pemphigoid
05:05

Technique of Conjunctival Biopsy and Direct Immunofluorescence for Diagnosing Mucous Membrane Pemphigoid

Published on: June 17, 2025

Granulocyte-dependent Autoantibody-induced Skin Blistering
12:23

Granulocyte-dependent Autoantibody-induced Skin Blistering

Published on: October 12, 2012

Area of Science:

  • Dermatology
  • Immunology
  • Autoimmune Diseases

Background:

  • Pemphigus encompasses several autoimmune blistering diseases, with IgA pemphigus being a distinct subtype.
  • IgA pemphigus involves IgA antibodies targeting epidermal cell surface components, leading to skin blistering.

Purpose of the Study:

  • To provide a comprehensive overview of IgA pemphigus.
  • To consolidate current knowledge on epidemiology, clinical presentation, pathology, and diagnostics.

Main Methods:

  • Systematic review of reported IgA pemphigus cases.
  • Analysis of existing literature on disease characteristics and management.

Main Results:

  • IgA pemphigus presents with distinct histopathological findings, including epidermal acantholysis and neutrophilic infiltration.
  • Two subtypes exist: intraepidermal neutrophilic IgA dermatosis-type (IEN-type) and subcorneal pustular dermatosis-type (SPD-type), with different target antigens.

Conclusions:

  • IgA pemphigus requires further research for improved understanding of its pathophysiology and treatment strategies.
  • This review serves as a resource for clinicians and researchers on IgA pemphigus.