Current Concepts on Bilirubin Metabolism and Gilbert’s Syndrome

1983 ◽  
pp. 70-77
Author(s):  
L. Okolicsanyi
Author(s):  
Roman Petrovich Stepchenkov

Gilbert's syndrome is a benign (functional) hyperbilirubinemia, which is based on a hereditary disorder of bilirubin metabolism, as a result of which the concentration of unbound bilirubin can increase several times. Bilirubin, being a breakdown product of hemoglobin, circulates through the bloodstream, combining with albumin molecules. Such bilirubin is called indirect. In the endoplasmic reticulum, it is conjugated; the enzyme glucuronyltransferase is responsible for this process. In Gilbert's syndrome, as a result of insufficient production of this enzyme, the conjugation process is disrupted, and, as a result, the concentration of unconjugated bilirubin increases. According to statistics, this pathological condition is observed in about 5 % of Russians. This syndrome was first described in 1901 by the French physician Augustin Nicolas Gilbert, and was subsequently named after him. The literature also contains references to this syndrome, described as «constitutional hepatic dysfunction», «familial non-hemolytic hyperbilirubinemia», «idiopathic non-conjugated hyperbilirubinemia». Gilbert's syndrome is inherited in an autosomal recessive manner; men get ill 3–4 times more often than women. A number of scientists associate this with a possible inhibitory effect of testosterone on the enzyme UDP-GT1, which breaks down bilirubin. Clinically, Gilbert's syndrome is manifested by episodes of jaundice caused by an increase in the level of unconjugated bilirubin in the blood serum. Against the background of icterus of the sclera and skin, there is increased fatigue, the appearance of a feeling of bitterness in the mouth, loss of appetite, nausea, and sometimes vomiting. The association of Gilbert's syndrome with functional disorders of the biliary tract, in particular, with gallbladder dyskinesia, is often noted.


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