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Hemolytic causes associated with bilirubin overproduction are diverse and include disorders such as sickle cell anemia, [2] hereditary spherocytosis, [3] thrombotic thrombocytopenic purpura, [4] autoimmune hemolytic anemia, [5] hemolysis secondary to drug toxicity, [6] thalassemia minor, [7] and congenital dyserythropoietic anemias. [8]
Hemolytic anemia affects nonhuman species as well as humans. It has been found, in a number of animal species, to result from specific triggers. [51] Some notable cases include hemolytic anemia found in black rhinos kept in captivity, with the disease, in one instance, affecting 20% of captive rhinos at a specific facility.
The increased breakdown of erythrocytes → increased unconjugated serum bilirubin → increased deposition of unconjugated bilirubin into mucosal tissue. [21] These diseases may cause jaundice due to increased erythrocyte hemolysis: [22] Sickle-cell anemia [23] Spherocytosis [24] Thalassemia [25] Pyruvate kinase deficiency
Bilirubin (BR) (from the Latin for "red bile") is a red-orange compound that occurs in the normal catabolic pathway that breaks down heme in vertebrates.This catabolism is a necessary process in the body's clearance of waste products that arise from the destruction of aged or abnormal red blood cells. [3]
Unconjugated bilirubin: Increased (normal range: 0.2–1.2 mg/dL). This is caused by heme released into the hepatosplenic circulation by macrophages that have phagocytosed erythrocytes. The unconjugated bilirubin is not soluble in water (blood), so it binds to albumin, and is processed in the liver.
Serum tests evaluate plasma bilirubin, haemolysis and liver function and are essential for definitive diagnosis. When total serum bilirubin exceeds 2.5 mg/dL and unconjugated bilirubin occupies >85% of total amount, it is classified as unconjugated hyperbilirubinemia. [6]
Before iron deficiency anemia sets in, “the body will do everything it can to retain the right number of red blood cells. So, it will deplete the storage iron before it depletes the red blood ...
The bilirubin-UGT enzyme performs a chemical reaction called glucuronidation. Glucuronic acid is transferred to unconjugated bilirubin, which is a yellowish pigment made when your body breaks down old red blood cells, [35] and then being converted to conjugated bilirubin during the reaction. Conjugated bilirubin passes from the liver into the ...