Is Kearns-Sayre syndrome life threatening?

KSS is a slowly progressive disorder. The prognosis for individuals with KSS varies depending on the severity and the number of organs involved. Early diagnosis and periodic electrocardiogram (ECG) are important since heart block can cause death in 20 percent of patients.

How does someone get Kearns-Sayre syndrome?

Most cases of Kearns-Sayre syndrome are not inherited ; they arise from mutations in the body’s cells that occur after conception. This alteration, called a somatic mutation , is present only in certain cells. Rarely, this condition is inherited in a mitochondrial pattern.

How do you treat KSS?

As with all mitochondrial diseases, there is no cure for KSS. Treatments are based on the types of symptoms and organs involved, and may include: Coenzyme Q10, insulin for diabetes, cardiac drugs, and a cardiac pacemaker which may be life-saving.

What is KSS biology?

KSS is a characteristic multiorgan disorder involving external ophthalmoplegia, heart block, and retinitis pigmentosa with onset before age 20 yr caused by single deletions in mtDNA. There must also be at least one of the following: heart block, cerebellar syndrome, or cerebrospinal fluid protein > 100 mg/dL.

Is Kearns-Sayre syndrome genetic?

Kearns-Sayre syndrome is a genetic disease caused by mutations in a particular type of DNA: mitochondrial DNA. In contrast, most of the DNA in your body is stored inside the nucleus of your cells, in chromosomes.

Which complex of the respiratory chain does Kearns-Sayre syndrome affect?

Enzymatic analysis revealed a deficiency of complex II of the mitochondrial respiratory chain, and, more specifically, a deficiency of succinic dehydrogenase, although both subunits of this enzyme proved to be present by immunologic analysis.

Is Kearns-Sayre syndrome recessive?

Autosomal dominant Kearns-Sayre syndrome.