Dictionary > Lipidosis

Lipidosis

Definition
noun, plural: lipidoses
A type of lysosomal storage disease that is often caused by a deficiency of enzymes essential in lipid metabolism, thus resulting in the accumulation of lipids in cells and tissues, which in turn, leads to the various symptoms associated with the disease
Supplement
Lipidosis is one of the many forms of lysosomal storage disease. Lysosomal storage disease is a collective term for the various metabolic disorders due to defects in lysosomal function resulting in an abnormal accumulation of toxic materials in the cell. In lipidosis, fats and lipids are in excess and thereby accumulate within cells. Over time, the buildup of fats and lipids leads to permanent damage in cells and tissues (e.g. brain, liver, spleen, bone marrow, etc.).
Lipidosis is caused by the deficiency of certain enzymes involved in lipid metabolism. The deficiency is associated with pathological mutations in certain genes. Lipidoses includes sphingolipidoses, neuronal ceroid lipofuscinoses, and Wolman disease. An example of sphingolipidosis is Niemann-Pick disease. Niemann-Pick disease is caused by a deficiency in sphingomyelinase resulting in the accumulation of sphingomyelin in brain and erythrocytes. It has four types: type A, type B, type C, and type D. Types A and B are associated with pathological mutation in SMPD1 gene whereas mutations in NPC1 OR NPC2 genes are associated with types C and D. These mutations lead to a deficiency in sphingomyelinase. Because of this, sphingomyelin accumulates in brain and erythrocytes, and eventually cause CNS damage, thrombocytopenia, spasticity, ataxia, and organ enlargement (particularly hepatosplenomegaly).
Synonym(s):

  • lipid storage disorder

See also:

  • lysosomal storage disease
  • sphingolipidosis


    You will also like...

    Body temperature regulation by the hypothalamus
    Temperature Regulation in Animals

    This tutorial elucidates body temperature regulation. Know the details here to learn how the body sets the body temperat..

    Pink Lotus plant on a pond
    Freshwater Lentic Communities & Animals

    This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..

    Homo Species
    The Homo Species

    The evolution of the species of the genus "Homo" led to the emergence of modern humans. Find out more about human evolut..

    Oligodendrocyte and Schwann cell
    The Central Nervous System

    Myelin sheath is essential for a faster conductivity of signals. Know more about this feature of some neurons in the Cen..

    Disturbance on a still water
    Abiotic Factors – Water Conditions

    A still body of water may be disturbed by a variety of factors. One of them is wind. In fact, it is considered as the pr..

    Chromosomes X and Y and Sex Determination
    Chromosomes X and Y and Sex Determination

    This tutorial looks at sex determination via the sex chromosomes, X and Y. Read it to get more info on X and Y chromosom..