page_title: Lamellar bodies
hierarchical_section_title: Lamellar bodies
caption_attribution_description: English: LGs start being secreted before establishment of paracellular permeability barrier. (A, B) TJ permeability assay using a surface biotinylation technique. LG molecules, CDSN and glucosylceramides (GlcCer) are co-localized with biotin (areas between arrowheads). A part of CDSN/biotin image in A is magnified in A′ and the points where the tracer stops are indicated with yellow arrows. The basement membrane zone is highlighted by the broken line. (C, D) Lanthanum penetration assay on normal human skin. (C) Lanthanum penetration is blocked at the TJ (bracket) in the SG1. (D) Secreted LGs (red arrows) can be found in the tracer permeable intercellular space. Green arrows indicate LGs in the cytoplasm. The area in the rectangle with broken lines in D is magnified in D′. D, desmosome. Bars = 10 µm (A, A′, B), 200 nm (C, D′) and 500 nm (D).
context_page_description: In cell biology, lamellar bodies are secretory organelles found in type II alveolar cells in the lungs, and in keratinocytes in the skin. They are oblong structures, appearing about 300-400 nm in width and 100-150 nm in length in transmission electron microscopy images. Lamellar bodies in the alveoli of the lungs, fuse with the cell membrane and release pulmonary surfactant into the extracellular space.
context_section_description: In cell biology, lamellar bodies (otherwise known as lamellar granules, membrane-coating granules (MCGs), keratinosomes or Odland bodies) are secretory organelles found in type II alveolar cells in the lungs, and in keratinocytes in the skin. They are oblong structures, appearing about 300-400 nm in width and 100-150 nm in length in transmission electron microscopy images. Lamellar bodies in the alveoli of the lungs, fuse with the cell membrane and release pulmonary surfactant into the extracellular space.
caption: Red arrows indicate secreted lamellar bodies, and green arrows indicate lamellar bodies in the cytoplasm. Scale bar = 200 nm.
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