MSUD is a recessive genetic disease. This means both parents of a child with MSUD must carry a mutation in the same gene (the same genetic code). These mutated genes do not function normally, thus causing disease. A person with a gene mutation is called a carrier. Carriers are not affected by their one abnormal gene. (Just as everyone carries genetic codes for things like the color of hair and eyes, everyone also carries several abnormal genes which can cause disease.)

Each individual person has two genes that code for the enzyme activity involved in the breakdown of the BCAAs-one gene coming from the father and one from the mother. If one gene functions normally, but the other does not, then the person is a carrier of MSUD. If neither gene functions normally, then that person has MSUD. It is also possible to receive the normal gene from each parent and not have any mutated genes for the disease.

When parents are both carriers of the gene for MSUD, with each pregnancy, there is a 1 in 4 chance of having a baby with MSUD, a 2 in 4 chance that the baby will have only one gene for MSUD and be a carrier like the parents, and a 1 in 4 chance that the baby will neither be a carrier nor have MSUD.

MSUD Awareness Day

Now more than ever before we are hearing about National Awareness Days which are set by organizations or the government to bring attention to issues of importance.

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Metformin As A Possible Therapeutic Agent In The Treatment Of MSUD

The MSUD Family Support Group has provided funds to Buck Institute for its preliminary studies investigating metformin

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As our legislators headed home for their August break, Rare Disease Legislative Advocates got busy.

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Indigo Charlie Mays - Variant MSUD Age 4

Meet our girl Indigo Charlie Mays. After a smooth pregnancy and delivery, she was born on July 21st, 2013 in Seattle, WA.

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Our Story

On April 23 2015, our precious firstborn son Eliyahu Tuvia was born in Jacksonville, FL. All seemed well and we took our bundle of joy home.

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Galen Carrington Classic MSUD age 27

Galen Carrington is a 27 year old Indiana resident who has classic MSUD. He underwent liver transplantation 5 years ago at Children’s Hospital

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A Child's Life

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