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Sirius Red

Chemical compound From Wikipedia, the free encyclopedia

Sirius Red
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Sirius Red F 3B (Direct Red 80) is an azo dye primarily used in staining methods for collagen and amyloid.[1] It has the molecular formula C45H26N10Na6O21S6.

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In histology, sirius red staining is used in various domains of diagnostic to observe fibrosis levels in a lot of cases of inflammation induced by cancer, vascular or metabolic pathologies.[2]

In bright field microscopy the following can be observed:

  • The nuclei in yellow
  • The cytoplasm in yellow
  • Collagen fibers in red
  • Muscular fibers in yellow
  • Red blood cells in yellow
Thumb
Sirius red staining in rat liver, where the red color indicates collagen deposition[3]
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