Is dyskeratosis congenita a genetic disorder?

Dyskeratosis congenita is a rare genetic form of bone marrow failure, the inability of the marrow to produce sufficient blood cells.

Who does dyskeratosis congenita affect?

Key points about dyskeratosis congenita in children It affects the skin and nails. In its most severe form, it causes bone marrow failure. Symptoms can include nail abnormalities, skin abnormalities, and white patches in the mouth.

What is DKC disease?

Dyskeratosis congenita (dis-ker-a-TOE-sis kon-JEN-et-a) is a rare bone marrow failure disorder. This means that the soft area in the center of most bones (marrow) does not make enough blood cells. People with DKC may have low levels of: White blood cells, which fight infection. Red blood cells, which carry oxygen.

Is dyskeratosis congenita a type of cancer?

Highlights from “Telomere Biology and Cancer Risk” Dyskeratosis Congenita (DC) is a cancer-prone inherited bone marrow failure syndrome (IBMFS) caused by aberrant telomere biology.

What type of mutation is dyskeratosis congenita?

In about half of people with dyskeratosis congenita, the disorder is caused by mutations in the TERT, TERC, DKC1, or TINF2 gene. These genes provide instructions for making proteins that help maintain structures known as telomeres , which are found at the ends of chromosomes.

What is the life expectancy of someone with dyskeratosis congenita?

Life expectancy ranges from infancy to well into the 7th decade. Up to 40% of patients will have BMF by the age of 40. Major causes of morbidity include BMF, cancer and pulmonary complications.

What are the symptoms of dyskeratosis congenita?

abnormalities of the skin, such as unusual pigmentation with a net-like pattern on the neck and upper chest.
defects in fingernails and toenails, including cracking, splitting, and underdevelopment or distortion.
oral lesions that appear as white patches in the mouth.

What organelle does dyskeratosis congenita affect?

Dyskeratosis congenita is a disorder of poor telomere maintenance mainly due to a number of gene mutations that give rise to abnormal ribosome function, termed ribosomopathy. Specifically, the disease is related to one or more mutations which directly or indirectly affect the vertebrate telomerase RNA component (TERC).

Is dyskeratosis congenita dominant or recessive?

When dyskeratosis congenita is caused by DKC1 gene mutations, it is inherited in an X-linked recessive pattern. The DKC1 gene is located on the X chromosome, which is one of the two sex chromosomes. In males (who have only one X chromosome), one altered copy of the gene in each cell is sufficient to cause the condition.

How does dyskeratosis congenita affect myelodysplastic syndrome?

People with dyskeratosis congenita are also at increased risk of developing leukemia even if they never develop myelodysplastic syndrome. In addition, they have a higher than average risk of developing other cancers, especially cancers of the head, neck, anus, or genitals.

What is the function of DKC1 gene?

The DKC1 gene provides instructions for making another protein that is important in telomerase function. This protein, called dyskerin, attaches (binds) to hTR and helps stabilize the telomerase complex. The shelterin complex helps protect telomeres from the cell’s DNA repair process.