What Causes Niemann-Pick Disease Type a?

What causes Niemann-Pick disease Type A?

Niemann-Pick disease type A is caused by a mutation in a gene known as SMPD1, which provides instructions for the production of an enzyme called acid sphingomyelinase. This enzyme is located in a cell’s lysosomes and is responsible for the conversion and recycling of a specific fat molecule.

What are the symptoms of Niemann-Pick disease?

Niemann-Pick signs and symptoms may include:

• Clumsiness and difficulty walking.
• Excessive muscle contractions (dystonia) or eye movements.
• Sleep disturbances.
• Difficulty swallowing and eating.
• Recurrent pneumonia.

What is Niemann-Pick disease type A treatment?

There is currently no cure for Niemann-Pick disease. Treatment is supportive. Children usually die from infection or progressive neurological loss. There is currently no effective treatment for persons with type A.

How long can you live with Niemann-Pick type C?

Niemann-Pick type C is always fatal. However, life expectancy depends on when symptoms begin. If symptoms appear in infancy, your child isn’t likely to live past the age of 5. If symptoms appear after 5 years of age, your child is likely to live until about 20 years of age.

How common is Niemann-Pick disease Type A?

Niemann-Pick disease type A occurs more frequently among individuals of Ashkenazi (eastern and central European) Jewish descent than in the general population. The incidence within the Ashkenazi population is approximately 1 in 40,000 individuals.

What chromosome is Niemann-pick on?

A number sign (#) is used with this entry because Niemann-Pick disease type C1 and Niemann-Pick disease type D, also known as the Nova Scotian type, are caused by homozygous or compound heterozygous mutation in the NPC1 gene (607623) on chromosome 18q11.

What organelles are affected by Niemann-Pick disease?

Niemann-Pick disease types A and B is caused by mutations in the SMPD1 gene. This gene provides instructions for producing an enzyme called acid sphingomyelinase. This enzyme is found in lysosomes , which are compartments within cells that break down and recycle different types of molecules.

What is Niemann-Pick Type B?

Niemann-Pick disease type B is an inherited condition involving lipid metabolism. People with this condition experience a build up of lipids in the spleen, liver, lungs, bone marrow, and brain.

Is Niemann-Pick disease the same as Pick’s disease?

Niemann-Pick disease type C is one of a group of rare inherited disorders. It is not related to frontotemporal dementia, which is also sometimes called Pick’s disease. It mainly affects school-age children but can occur at any time, from early infancy to adulthood.

Is Niemann-Pick disease curable?

No cure exists for Niemann-Pick disease. No effective treatment is available to people with type A or B. For people with mild to moderate type C, a drug called miglustat (Zavesca) may be an option.

What is type 1 Niemann Pick disease?

1 Overview. Niemann-Pick is a rare, inherited disease that affects the body’s ability to metabolize fat (cholesterol and lipids) within cells. 2 Symptoms. The three main types of Niemann-Pick are types A, B and C. 3 Causes. Niemann-Pick is caused by mutations in specific genes related to how the body metabolizes fat (cholesterol and lipids).

What is the difference between Niemann-Pick Type B and Type C?

Type B usually occurs later in childhood and is not associated with primary brain disease. Most people affected with type B survive into adulthood. Niemann-Pick type C is a rare inherited disease. The genetic mutations of this type cause cholesterol and other fats to accumulate in the liver, spleen or lungs.