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|a 10.3760/cma.j.cn112140-20240415-00269
|2 doi
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|e rakwb
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|a chi
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|a Wang, C H
|e verfasserin
|4 aut
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|a Congenital bile acid synthetic disorder type 3 caused by CYP7B1 gene variation in 2 cases and literature review
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|c 2024
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|a Text
|b txt
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 03.09.2024
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|a Date Revised 17.09.2024
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|a published: Print
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|a Citation Status MEDLINE
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|a Objective: To summarize the clinical features and genetic characteristics of Congenital bile acid synthetic disorder type 3 (BASD3) disorder caused by CYP7B1 gene variation. Methods: This was a case series study. Clinical data and genetic results of 2 cases of congenital bile acid synthetic disorder type 3 caused by CYP7B1 gene variations in the Department of Infectious Diseases, Children's Hospital of Fudan University at Xiamen and Department of Pediatrics, Women and Children's Hospital, School of Medicine, Xiamen University from January 2021 to December 2023 were retrospectively collected and analyzed. Literature up to December 2023 was searched from electronic databases of China National Knowledge Infrastructure (CNKI), Wanfang Data and PubMed with the combined keywords of " Congenital bile acid synthetic disorder type 3""Oxysterol 7-alpha-hydroxylase""Oxysterol 7α-Hydroxylase Deficiency""BASD3" and "CYP7B1 liver" both in Chinese and English. The main clinical features and genetic characteristics of BASD3 disorder caused by CYP7B1 gene variations were summarized. Results: Two BASD3 patients, 1 male and 1 female, were admitted at the ages of 3 months and 18 days, and 2 months and 7 days, respectively. Both patients presented with neonatal cholestasis and hepatomegaly. Biochemical evidence indicated direct hyper-bilirubinemia with elevated aminotransferase levels, while gamma-glutamyltransferase (GGT) and total bile acid levels were normal or nearly normal. Patient 1 was a compound heterozygotes of the CYP7B1 gene variants c.525-526insCAAGTTGG(p.Asp176GInfs*15) and c.334C>T(p.Arg112Ter). Patient 1 jaundice resolved and liver function tests normalized after oral administration of chenodeoxycholic acid (CDCA). Patient 2 was homozygous for variant c.334C>T(p.Arg112Ter) in CYP7B1 gene. Patient 2 was in liver failure status already and not reactive to oral CDCA administration. Patient 2 received living-related liver transplantation for enhanced abdominal CT revealed a liver tumor likely vascular origin. Literature review revealed no cases of BASD3 reported in Chinese literature, including 2 patients in this study, while 12 patients (9 males and 3 females) were reported in 9 English literatures. All of the 12 manifested jaundice and hepatosplenomegaly in infancy, with cirrhosis, liver failure, kidney enlargement, hypoglycemia, and spontaneous bleeding in some cases, polycystic kidney disease was demonstrated in 5 cases of them. The c.334C>T (p.Arg112Ter) of the CYP7B1 gene was homozygous in 4 cases and compound heterozygous in 2 cases. Among the 12 children, 6 cases received CDCA treatment, while 6 cases not. Four survived with their native liver in the 6 cases who received CDCA therapy, while none in the 6 cases not received CDCA therapy. Conclusions: BASD3 is a rare hereditary cholestatic disorder. Markedly elevated levels of conjugated bilirubin and aminotransferases, with normal or nearly normal GGT and total bile acid levels can serve as diagnostic clue. c.334C>T is the most common pathogenic variant of the CYP7B1 gene. Timely administration of CDCA may save the liver
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|a Journal Article
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|a Case Reports
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|a Review
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|a English Abstract
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|a Bile Acids and Salts
|2 NLM
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|a CYP7B1 protein, human
|2 NLM
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|a EC 1.14.14.29
|2 NLM
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|a Cytochrome P450 Family 7
|2 NLM
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|a EC 1.14.14.23
|2 NLM
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|a Steroid Hydroxylases
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| 700 |
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|a Lu, M
|e verfasserin
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|a Zhao, J
|e verfasserin
|4 aut
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|a Huang, B Q
|e verfasserin
|4 aut
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|a Ye, P P
|e verfasserin
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|a Wang, J S
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Zhonghua er ke za zhi = Chinese journal of pediatrics
|d 1960
|g 62(2024), 9 vom: 02. Sept., Seite 877-882
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|g volume:62
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|g pages:877-882
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|u http://dx.doi.org/10.3760/cma.j.cn112140-20240415-00269
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