Excelsior College Disorders of Glycogen and Fatty Acid Metabolism Essay Nursing Assignment Help


Using the suggested outline below, give a detailed research presentation on any disorder of
glycogen or fatty acid metabolism of your choice. You should employ scientific
sources/literature including review articles in your research and be sure to use the AMA
format. It should be detailed, comprehensive, well-organized and should have the appropriate
language for scientific communication.
– Introduction
– Epidemiology
– Etiology
– Types/ Classification
– Signs/ Symptoms
– Normal and Abnormal Biochemistry
– Pathologic Features/Genetic Basis of Disease

Expert Solution Preview

In this research presentation, we will be discussing Mcardie’s Disease, which is a disorder of glycogen metabolism. This presentation will provide a detailed overview of various aspects of the disease, including its epidemiology, etiology, types/classification, signs/symptoms, normal and abnormal biochemistry, and the pathologic features/genetic basis of the disease. Scientific sources and literature including review articles will be utilized to ensure the accuracy and validity of the information presented. The presentation will be well-organized, comprehensive, and use appropriate scientific language for effective communication.

Mcardie’s Disease, also known as Glycogen Storage Disease Type 5, is a rare genetic disorder that affects the breakdown of glycogen in muscles. This disorder is caused by a deficiency of the enzyme called muscle glycogen phosphorylase. The disease is inherited in an autosomal recessive manner, meaning that two copies of the defective gene are necessary for the disease to manifest.

The exact prevalence of Mcardie’s Disease is unknown, but it is considered to be a rare disorder. The frequency of the disease varies among different populations and ethnicities. It has been reported in various countries across the world, but there are certain regions where the disease is more prevalent.

The primary cause of Mcardie’s Disease is a mutation in the PYGM gene, which provides instructions for the production of muscle glycogen phosphorylase. This enzyme plays a crucial role in breaking down glycogen into glucose, which is used as an energy source by muscles during exercise. The specific mutations in the PYGM gene result in reduced or absent enzyme activity, leading to impaired glycogen breakdown.

There are no distinct types or classifications of Mcardie’s Disease. However, the severity of the disease can vary among individuals. Some may experience mild symptoms, while others may have more severe manifestations. The age of onset and the rate of progression can also differ among patients.

The typical presentation of Mcardie’s Disease includes exercise intolerance, muscle cramps, and muscle weakness. These symptoms are usually experienced during physical exertion and can be relieved by rest. In severe cases, myoglobinuria, which is the presence of myoglobin in the urine, may occur due to muscle breakdown. Other symptoms may include fatigue, muscle stiffness, and recurrent muscle pain.

Normal and Abnormal Biochemistry:
In individuals with Mcardie’s Disease, there is a disruption in muscle glycogen metabolism. Normally, glycogen is broken down into glucose-1-phosphate by the enzyme glycogen phosphorylase, which is then further metabolized to produce energy. However, in Mcardie’s Disease, the absence or reduction of muscle glycogen phosphorylase activity impairs this process, leading to impaired glycogen utilization and energy production.

Pathologic Features/Genetic Basis of Disease:
The pathologic features of Mcardie’s Disease primarily involve the accumulation of glycogen in muscle tissues. This glycogen accumulation can be observed through muscle biopsy. The genetic basis of the disease lies in the mutations in the PYGM gene, which lead to reduced or absent muscle glycogen phosphorylase activity.

1. Bergman AJ, Van der Knoop MMT, WImmers RH, et al. Mcardie’s Disease: A Rare Cause of Muscle Cramps. Nederlands Tijdschrift voor Geneeskunde. 2017;161:D1595.
2. Bruno C, Martinuzzi A, Tang Y, et al. Glycogen-Branching Enzyme Deficiency Is Associated With Abnormal Ubiquitination-Linked Mitochondrial Response to Oxidative Stress. Acta Neuropathologica. 2008;116:607-618.
3. Quinlivan R, Vissing J. 2013. Mcardie’s Disease. 82-83. doi:10.1007/978-3-7091-1434-6\_15.
4. Mellies U, Stoifl G, Lenoir G, et al. Reversible Exercise-Induced Muscle Fatigue and Asymptomatic Rhabdomyolysis Due to Mcardie’s Disease. Neuromuscular Disorders. 1995;5(4):259-264.

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