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1036A AASLD ABSTRACTS HEPATOLOGY, October, 2015 1696 Diagnostic determination system for high-risk screening for inborn errors of bile acid metabolism: Results during 20 years in East Asia Nakayuki Naritaka 1 , Mitsuyoshi Suzuki 1 , Hajime Takei 2 , Akihiko Kimura 3 , Takao Kurosawa 4 , Takashi Iida 5 , Hiroshi Nittono 2 , Toshiaki Shimizu 1 ; 1 Pediatrics, Juntendo University Faculty of Medicine, Tokyo, Japan; 2 Junshin Clinic bile acid institute, Tokyo, Japan; 3 Pediatrics, Kurume University School of Medicine, Fukuoka, Japan; 4 Faculty of Pharmaceutical Sciencies, Health Services University of Hokkaido, Hokkaido, Japan; 5 Nihon University College of Humanities and Sciences, Tokyo, Japan BACKGROUND: Some patients with cholestasis of unknown cause may have inborn errors of bile acid metabolism (IEBAM), leading to abnormalities of bile acid biosynthesis. Although many types of bile acid synthesis defects have been reported for this disorder, no detailed information on its incidence and other aspects in East Asia has been available. To elucidate the current status of IEBAM, in July 1996, a diagnostic determination system was established for high-risk screening for IEBAM. METHODS: The target patients included children with hepatic disorders for which the cause could not be identified on conventional liver function testing or hepatitis virus testing, patients with liver cirrhosis of unknown etiology, sibling cases, and patients with cholestasis who exhibited serum levels of direct bilirubin (D-Bil) was ^2.0mg/dL,besides total bile acid and γ-glutamyltranspeptidase (GGT) were within the normal range. Urine samples were sent to the Bile Acid Institute which located in Tokyo, via refrigerated delivery service or impregnated filter paper with sufficient urine volume. The samples were analyzed during the 20 years between July 1996 and May 2015.Urinary bile acids were analyzed via gas chromatography–mass spectrometry (GC/MS) or liquid chromatography-tandem mass spectrometry (LC-MS/MS). RESULTS: In 960 cases analyzed over a 20-year period, 12 samples were differentially diagnosed with IEBAM, including: 3β-hydroxy-Δ 5 -C 27 -steroid dehydrogenase/isomerase deficiency in 5 (2 in Japan, 2 in China, 1 in Thailand), 3-oxo-Δ 4 -steroid 5β-reductase deficiency in 3 (all in Japan), oxysterol 7α-hydroxylase deficiency in 3 (1 in Japan, 2 in Taiwan), bile acid-CoA amino acid N-acyltransferase deficiency in 1 (speculated in Thailand). Especially in Japanese cases, 2 cases each of 3β-hydroxy-Δ 5 -C 27 -steroid dehydrogenase/isomerase deficiency and 3-oxo-Δ 4 -steroid 5β-reductase deficiency were effectively treated with oral bile acid therapy. The third case of 3-oxo-Δ 4 -steroid 5β-reductase deficiency had spontaneous remission without oral therapy. The Japanese case of oxysterol 7α-hydroxylase deficiency underwent successful heterozygous living donor liver transplantation. CONCLUSIONS: Twelve patients were identified with cholestasis of unknown cause in East Asia during 20 years. IEBAM is a rare hereditary disease; therefore, much cost and labor is spent to make a definitive diagnosis via genetic analysis. The diagnostic determination system with urinalysis is considered useful for diagnosis and treatment planning, and furthermore, contributes to improved treatment efficacy for IEBAM. Disclosures: The following authors have nothing to disclose: Nakayuki Naritaka, Mitsuyoshi Suzuki, Hajime Takei, Akihiko Kimura, Takao Kurosawa, Takashi Iida, Hiroshi Nittono, Toshiaki Shimizu 1697 Role of transient elastography to differentiate children with biliary atresia from other causes of neonatal cholestasis Bikrant B. Lal, Rajeev Khanna, Vikrant Sood, Dinesh Rawat, Seema Alam; DEPARTMENT OF PEDIATRIC HEPATOLOGY, INSTITUTE OF LIVER AND BILIARY SCIENCES, New Delhi, India Transient elastography is an important non-invasive tool to detect fibrosis. Children with biliary atresia need to be diagnosed early as outcome post Kasai surgery depends on age at operation. Fibroscan can serve as an important non-invasive tool and an alternative to liver biopsy. Objective: To study the role of transient elastography to differentiate biliary atresia from neonatal hepatitis. To evaluate its efficacy in predicting outcome post kasai portoenterostomy. Methodology: All patients with neonatal cholestasis were included in the study and evaluated as per the instituitional protocol. Transient elastography (TE) was done in a 4-hour fasting state using Fibro- Scan502, Echosens, Paris, France. Median of 10 successful readings was taken and values with IQR>30% or success rate of
HEPATOLOGY, VOLUME 62, NUMBER 1 (SUPPL) AASLD ABSTRACTS 1037A in experimental and human BA. Methods: Neonatal mice were challenged with saline or RRV soon after birth. Gene expression was determined by real-time PCR and immune cells were quantified by flow cytometry. Histology was performed using H/Estained sections. Immunofluorescence was performed using antibodies against C5aR, CD68, pan-cytokeratin (CK) and Vimentin. Liver wedge biopsies were obtained from patients at Kasai and explants at transplantation. Genome-wide expressions were obtained from GEO Series: GSE46995. Results: In diseased mice, expression levels of Cd68, Cd14 and Mpeg1 progressively increased from the inception of epithelial injury to complete duct atresia (days 3–14, 1.7–4.5 fold above saline-injected mice; P=0.001). Proinflammatory macrophage polarization correlated with increased expressions of Ccl2, Ccl3, Ccl4, Ccr7, Tlr2 and Tlr6 (1.3–8.3 fold above controls; P
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1312A AUTHOR INDEX HEPATOLOGY, Octo
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1366A CATEGORY INDEX HEPATOLOGY, Oc
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