Related Experiment Video
Updated: Jul 13, 2026

06:24
Mouse Models of Periventricular Leukomalacia
Published on: May 19, 2010
Sulfatides in prenatal metachromatic leukodystrophy.
Journal of Neurochemistry
|December 1, 1983
Summary
Early diagnosis of metachromatic leukodystrophy (MLD) in a fetus revealed significant sulfatide buildup in the spinal cord and kidneys due to deficient cerebroside sulfatase. Forebrain sulfatides were measurable but not increased, with galactosyl ceramides remaining normal.
Area of Science:
- Biochemistry
- Neurology
- Genetics
Background:
- Metachromatic leukodystrophy (MLD) is a rare genetic disorder.
- It is characterized by the accumulation of sulfatides in the nervous system and other organs.
- Prenatal diagnosis allows for early intervention and management.
Purpose of the Study:
- To investigate the galactolipid content in a fetus with prenatally diagnosed MLD.
- To compare these levels to a control fetus.
- To understand the early biochemical changes in MLD.
Main Methods:
- Galactolipid analysis was performed on tissue samples from a 21-week-old fetus with MLD.
- Tissues analyzed included forebrain cortex, cerebellum, brainstem, spinal cord, and kidney.
- Levels were compared to an age-matched control.
Main Results:
- The spinal cord and kidney exhibited the highest accumulation of sulfatides.
- This accumulation is attributed to deficient cerebroside sulfatase activity.
- Measurable, but not increased, sulfatide levels were found in the forebrain.
- Prenatal neural sulfatides were rich in hydroxy fatty acids.
- Galactosyl ceramides were not reduced in this early stage.
Conclusions:
- Sulfatide accumulation in MLD begins early, prominently affecting the spinal cord and kidneys.
- The forebrain shows a different pattern of sulfatide accumulation in early stages.
- These findings highlight the utility of prenatal analysis for understanding MLD pathogenesis.
Related Concept Videos
Lysosomal Hydrolases
Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
Preparation and Reactions of Sulfides
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
Glucose Transporters
Glucose transporters facilitate the transport of glucose across the cell membrane. In addition to glucose, some glucose transporters can also aid the movement of other hexoses such as fructose, mannose, and galactose.
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:
Drug Metabolism: Phase II Reactions
Phase II reactions are essential for the detoxification and elimination of drugs from the body. These reactions involve the conjugation of parent drugs or their phase I metabolites with endogenous molecules, resulting in more hydrophilic drug conjugates. The primary conjugation reactions in this phase are sulfation and glucuronidation. Both sulfation and glucuronidation typically produce biologically inactive metabolites. However, in some cases involving prodrugs, active metabolites may be...
Inborn Errors of Metabolism
Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...
Sulfur Assimilation
Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to become...

