FIC1 and BSEP defects in Taiwanese patients with chronic intrahepatic cholestasis with low gamma-glutamyltranspeptidase levels.
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Chen HL, Chang PS, Hsu HC, Ni YH, Hsu HY, Lee JH, Jeng YM, Shau WY, Chang MH
FIC1 and BSEP defects in Taiwanese patients with chronic intrahepatic cholestasis with low gamma-glutamyltranspeptidase levels.
J Pediatr. 2002 Jan;140(1):119-24.
- PubMed ID
- 11815775 [ View in PubMed]
- Abstract
To elucidate the frequency of FIC1 (ATP8B1) and BSEP (ABCB11) mutations in Taiwanese children with chronic intrahepatic cholestasis with low gamma-glutamyltranspeptidase (GGT) levels, we assessed 13 unrelated patients with infantile onset chronic intrahepatic cholestasis. Liver complementary DNA sequencing was performed in 7 infants for mutation analyses of FIC1 and BSEP genes. Two distinct liver histologic features were found. Group 1 (n = 5) was characterized by bland cholestasis and group 2 (n = 8) by giant cell transformation. Group 2 patients were associated with higher transaminase levels, alpha-fetoprotein levels, and early mortality. Novel FIC1 mutations were found in all 4 patients tested in group 1, including a 74-bp deletion, a 98-bp deletion, a nonsense, and 2 missense mutations. BSEP mutations were found in 2 of the 3 patients in group 2, including 2 missense mutations and a 1-bp deletion. Phenotypic characterization is useful to differentiate FIC1- from BSEP-related disease.