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Alcohol-induced liver disease
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Familial adenomatous polyposis
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Appendicitis: Pathology review
Cirrhosis: Pathology review
Colorectal polyps and cancer: Pathology review
Congenital gastrointestinal disorders: Pathology review
Diverticular disease: Pathology review
Esophageal disorders: Pathology review
Gallbladder disorders: Pathology review
Gastrointestinal bleeding: Pathology review
GERD, peptic ulcers, gastritis, and stomach cancer: Pathology review
Inflammatory bowel disease: Pathology review
Jaundice: Pathology review
Malabsorption syndromes: Pathology review
Neuroendocrine tumors of the gastrointestinal system: Pathology review
Pancreatitis: Pathology review
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Emilee Williams - Fighting Wilson's Disease
House "Wilson's Disease clip"
Wilson's Disease Pathophysiology
Wilson's Disease Symptoms
Hereditary Hemochromatosis & Wilson's Disease
Wilson disease p. 402
Wilson disease as cause p. 402
for Wilson disease p. 402
chromosome association p. 62
Fanconi syndrome p. 606
free radical injury and p. 211
One essential mineral that our body needs to get through the diet is copper, and typically we take in about 1 to 2 mg per day from the food we eat, things like whole grains, beans, nuts and potatoes; but really our body only needs about 0.75 mg / day, so that extra copper is excreted.
About 90% of the excess copper is excreted into the bile, where it eventually ends up as fecal copper, and the other 10% is excreted in the urine.
In Wilson disease, there’s genetic defect that results in the excess copper being kept in the body and deposited in various tissues...where it’s not supposed to be, and just like iron, free copper reacts with hydrogen peroxide in the body to form the hydroxyl radical, a reactive oxygen species that’s pretty good at damaging tissue, so over time those tissues are seriously damaged by free radical generation.
Now your liver cells, or hepatocytes, play a really important role in helping the body get rid of excess copper.
So usually the copper from the diet is absorbed in the small intestine via enterocytes, and passed off into the portal vein to the liver.
Once it’s in the liver it’s sent to a special transport protein called ATP7B, which has a couple super important jobs.
The first job, is that it binds copper to apoceruloplasmin, which is the major copper-carrying protein in the blood and is responsible for carrying 95% of the copper in blood.
After it binds copper it’s then just called ceruloplasmin, and this guy can haul 6 molecules of copper at once.
ATP7B’s other job is to gather up the rest of the copper into vesicles to be exocytosed into into the bile canaliculi, where it goes into the bile and is eventually excreted.
With Wilson disease, there’s an autosomal recessive defect in this ATP7B transport protein. As you could probably guess, that means it can’t incorporate the copper into ceruloplasmin or excrete it into the bile.
Since it’s not doing either of these things anymore, the copper builds up inside the hepatocyte and starts to produce free radicals.
Eventually, all this built up copper and free-radical damage injures or destroys the hepatocyte, causing free copper to spill out into the interstitial space and from there into the blood supply, where it’s circulated to and deposited in other tissues, where it also causes free radical damage over time.
Wilson disease is a rare autosomal recessive genetic disorder that causes excessive accumulation of copper in various tissues of the body, particularly the liver, and brain as a result of a mutation in the ATP7B gene. Symptoms of Wilson disease can vary widely and may include fatigue, abdominal pain, muscle stiffness or tremors, and a characteristic brown ring around the cornea of the eye known as a Kayser-Fleischer ring. Over time, copper accumulation in the liver can lead to liver disease and cirrhosis, and copper accumulation in the brain can cause neurological symptoms such as movement disorders, psychiatric symptoms, and cognitive decline.
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