General Purpose: To inform
Specific Purpose: To let the audience know that Citrullinemia is an inherited disorder that causes ammonia and other toxic substances to accumulate in the blood.
Central Idea: Patients who are affected by Citrullinemia know that their bodies are at risk as the ammonia builds up in the body causing lack of energy and problems within their muscles.
INTRODUCTION
I. Attention Material
A. Two forms of Citrullinemia have been described including: Type I Citrullinemia and Type II Citrullinemia. They have different signs and symptoms and are caused by mutations in different genes.
B. Type I Citrullinemia is the most common form of the disorder, affecting about 1 in 57,000 people worldwide.
II. Orienting Material
A. Infants
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ASS1 is a gene that typically causes type I Citrullinemia. It provides instructions for making an enzyme that is responsible for one step of the urea cycle.
B. SLC25A13 is a gene that typically causes type II Citrullinemia. This gene provides instructions for making a protein called citrin.
II. This condition is inherited in an autosomal recessive pattern.
A. To inherit this condition, both copies in the gene must have a mutation.
B. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition.
III. Symptoms of Citrullinemia vary depending on the type Citrullinemia that people are diagnosed with.
A. Initial symptoms of type I include: poor appetite, vomiting, lethargy, increased intracranial pressure, apnea, seizures, coma, and possibly leading to death.
B. Initial symptoms of the milder form in children may include: poor growth, poor appetite, vomiting, headaches, learning disabilities, behavior problems, hyperactivity, balance and coordination problems, and spasticity.
CONCLUSION
I. Summary
A. Citrullinemia has been a form of disorder than has affected 1 out of 57,000 people.
B. It is commonly associated with infants and rarely starting during
5. What is the prevalence and prognosis of this condition? Is it an inheritable (genetic) condition/disease? (1 point)
Because there are different types of Waardenburg Syndrome, there are different types of inheritance patterns. Types I and III have an autosomal dominant inheritance pattern while types II and IV have an autosomal recessive inheritance pattern (Calendar 2013). The most common type of inheritance is the autosomal dominant inheritance (Type two 2013). An autosomal dominant inheritance pattern means that the mutated gene (EDNRB, EDN3, MITF, SNAI2, PAX3 and SOX10) is in each cell to cause Waardenburg Syndrome (Genetics 2013). In other words, only one parent has to have the copy of the altered gene in order for someone to have the syndrome. An autosomal recessive inheritance pattern means that the mutated gene has to come from both parents in order for a person to have Waardenburg Syndrome (Calendar 2013). Even though both parents carry the mutated genes, they don’t usually show any signs or symptoms of Waardenburg Syndrome.
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c. Argument #1: The symptoms that are described in the trials are violent muscle spasms, vomiting, delusions, hallucinations, crawling sensations on the skin, and more.
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