How is lipofuscin identified?
Lipofuscin is stained by several lipid-staining methods: Sudan III and oil red.
It gives acid-fast coloration with carbol fuchsin.
It stains with ferric ferricyanide (Schmorl method I), methyl green, and the periodic acid-Schiff (PAS) reaction..
What are endogenous pigments?
Endogenous Pigments. Endogenous pigments are characterized as hematogenous and nonhematogenous. Hematogenous pigments originate from blood and nonhematogenous pigments originate from non-blood, fat or fatlike, and non-fatlike substances.
What are exogenous pigments?
Exogenous pigments are characterized as agents containing color that are formed outside of the body but found within tissues. Exogenous pigments can find their way into the body in a variety of ways. Examples of exogenous pigments are carbon, asbestos fibers, tattoo ink, and metals.
What causes lipofuscin?
Numerous studies indicate that the formation of lipofuscin is due to the oxidative alteration of macromolecules by oxygen-derived free radicals generated in reactions catalyzed by redox-active iron of low molecular weight. Two principal explanations for the increase of lipofuscin with age have been suggested.
Why lipofuscin is called the wear and tear pigment?
Lipofuscin is sometimes called “wear-and-tear pigment”, since the amount increases over time (i.e., with advancing age) in cells like hepatocytes and neurons which are both permanent (not routinely replenished) and metabolically active. … Each of these cell types has a characteristic position.
What is lipofuscin pigment?
Lipofuscin is a fluorescent pigment that accumulates with age in the lysosomal compartment of postmitotic cells in several tissues, such as neurons and heart and skeletal muscle among many others. … RPE lipofuscin can act as a photosensitizer, generating reactive oxygen species, and mediating light-induced damage.
How do you prevent lipofuscin?
Calorie restriction, vitamin E, and increased glutathione appear to reduce or halt the production of lipofuscin. The nootropic drug piracetam appears to significantly reduce accumulation of lipofuscin in the brain tissue of rats. Other possible treatments: Centrophenoxine.
What is Brown atrophy of heart?
Brown atrophy of the heart is atrophy of the heart muscle (or myocardium) commonly found in the elderly. It is described as brown because fibers become pigmented by intracellular deposits (mostly around the cell nucleus) of lipofuscin, a type of lipochrome granule.
What is ceroid pigment?
Pigmentation. Accumulation of ceroid (lipofuscin) pigment is a common age-related change in stromal cells of the rodent ovary, as in a number of other steroid secreting tissues including Leydig cells and the adrenal cortex.