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Glycolipids and Prostaglandins
Glycolipids and Prostaglandins by Dr. Knight
37
Medical
Professional
09/08/2011

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Term
a compound that is made of carbs and lipids, is a ceramide derivative
it functions in regulatingcell growth, development, and cell-cell interaction. ALso has a role in ABO blood group antigens.
Definition
Glycolipids
Term
What compound is found predominately in nerve tissue, but can be seen in all body tissue. It is also found in the exterior of the plasma membrane in touch with ECM
Definition
glycolipids
Term
the organization of glycolipids
Definition
GLYCOLIPIDS
Neutral
Acidic
Gangliosides
Sulfatides
Term
a type of neutral glycosphingolipid that is made of either galactose or glucose and is found primarily in the Brain and PNS
Definition
cerebrosides
Term
a negatively charged glycosphingolipid that can be either a ganglioside or a sulfatide
Definition
acidic glycosphingolipid
Term
an acidic glycosphingolipid that has one or more negatively charged NANA moleucles. It is made of ceramide derivative and is located mostly in ganglion cells and nerve endings
Definition
gangliosides
Term
an acidic glycosphingolipid that is composed of cerebrosides that have sulfated galactosyl residues
These are found primarily in the nerve tissue and kidney
Definition
sulfatides
Term
the major sulfatide found in the brain
Definition
galactocerebroside 3-phosphate
Term
in gamnglioside nomenclature the G stands for
Definition
ganglioside
Term
in gamnglioside nomenclature the M stands for
Definition
the number of NANA molecules (Mono, Di, Tri)
Term
in gamnglioside nomenclature the # stands for
Definition
monomeric sequence of migration (1, 2, 3)
Term
Where does glycosphingolipid synthesis occur
Definition
in the golgi
Term
what are the enzymes involved in glycosphingolipid synthesis?
Definition
glycosyl transferases
sulfotransferases- transfers sulfate group from PAPS
Term
Major enzyme used in glycosphingolipid degradation
Definition
lysosomal enzymes
Term
during a defiency of glycosphingolipid degradation where is there an accumulation of glycosphingolipids
Definition
in the lysosomes
Term
a general name for a defienency that occurs when a specific lysosomal enzyme is defieicent and usually one spingolipid accumulates.
It can be diagnosed by enzyme activity and DNA analysis. Also by histological examination
Definition
sphingolipidosis
Term
How is sphingolipidosis treated?
Definition
enzyme replacement therapy and bone marrow transplant
Term
an X linked recessive disorder caused by a deficiency in a-galactosidase. Symptoms are a skin rash ans kidney failure
Definition
Fabry's disease
Term
a hexaminidase deficiency that causes symptoms of heptomegaly, neurological deterioration, and blindness
Definition
Tay-Sachs
Term
an autosomal recessive sphinomylinase defiency that can be type A or type B
Definition
Neimann-Pick Dieases
Term
a sphiingomyelinase deficiency that is seen in infants with less that 1% enzymatic activity
Also the patients have hepatosplenomegaly and neurological degeneration
Definition
Type A Niemann-Pick Disease
Term
a sphingomyelinase deficiency characterized bt hepatosplenomegaly that usually a seen in adults
Definition
Niemann-Pick type B
Term
a disorder caused by a beta-glucosidase defiency, characterized by enlarged liver and spleen, erosion of the long bone. and retardation in infants
Definition
Gaucher's Disease
Term
a ceramidase defiency that causes hoarseness, dermatitis, skeletal deformation, mental retardation, and is fatal early in life
Definition
Farber's disease
Term
a short lived unstored molecule, whose precursors are made of unsaturated FAs longer than 20 Cs

THe function is the mediate g proteins, regulation of smooth muscle contraction, promotion of blood clotting process, inflammatory response, and hypersensitivity
Definition
eicosanoids
Term
Where are eicosanoids produced?
Definition
produced in all tissues
Term
Produced by activated platelets
Promotes platelet aggregation and formation of blood clots
Vasoconstriction
Definition
thromboxane A2 (TXA2)
Term
Produced by endothelial cells
Inhibits platelet aggregation
Vasodilation
Definition
Prostacyclin (PGI2)
Term
Produced by most tissues
Vasoconstriction
Smooth muscle contraction
Definition
Prostaglandin F2α(PGF2α)
Term
Produced by hepatocytes, also in most tissues
Vasodilation
Smooth muscle relaxation
Definition
Prostaglandin E2 (PGE2)
Term
this compound serves as a precursor to provide arachadonic acid 20:4(5,8,11,14)
Definition
linoleic acid 18:2(9,12)
Term
the function of these enzymes is to create 5 membered ring structure of PGG
Definition
cyclooxygenase (COX) enzymes
Term
Constitutively expressed in all tissues
Involved in cell maintenance
Definition
COX-1
Term
Inducible enzyme during inflammatory response
Definition
COX-2
Term
inhibit COX-1 & COX-2
Side effects: GI discomfort
Definition
NSAIDs
Term
an inhibitor of COX-2 that is used in the treatment of arthritis
Side effects: stroke and heart attack
Definition
Celebrex, Bextra, Vioxx
Term
Inhibits action of acetaminophen
Definition
COX-3
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