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2. Genotypic and phenotypic spectrum of infantile liver failure due to pathogenic TRMU variants

Author

Vogel, Georg F., Mozer-Glassberg, Yael, Landau, Yuval E., Schlieben, Lea D., Prokisch, Holger, Feichtinger, René G., Mayr, Johannes A., Brennenstuhl, Heiko, Schröter, Julian, Pechlaner, Agnes, Alkuraya, Fowzan S., Baker, Joshua J., Barcia, Giulia, Baric, Ivo, Braverman, Nancy, Burnyte, Birute, Christodoulou, John, Ciara, Elzbieta, Coman, David, Das, Anibh M., Darin, Niklas, Della Marina, Adela, Distelmaier, Felix, Eklund, Erik A., Ersoy, Melike, Fang, Weiyan, Gaignard, Pauline, Ganetzky, Rebecca D., Gonzales, Emmanuel, Howard, Caoimhe, Hughes, Joanne, Konstantopoulou, Vassiliki, Kose, Melis, Kerr, Marina, Khan, Aneal, Lenz, Dominic, McFarland, Robert, Margolis, Merav Gil, Morrison, Kevin, Müller, Thomas, Murayama, Kei, Nicastro, Emanuele, Pennisi, Alessandra, Peters, Heidi, Piekutowska-Abramczuk, Dorota, Rötig, Agnès, Santer, René, Scaglia, Fernando, Schiff, Manuel, Shagrani, Mohmmad, Sharrard, Mark, Soler-Alfonso, Claudia, Staufner, Christian, Storey, Imogen, Stormon, Michael, Taylor, Robert W., Thorburn, David R., Teles, Elisa Leao, Wang, Jian-She, Weghuber, Daniel, and Wortmann, Saskia

Published
2023
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3. Genotype-phenotype relationships of truncating mutations, p.E297G and p.D482G in bile salt export pump deficiency

Author

Felzen, Antonia, van Wessel, Daan B.E., Gonzales, Emmanuel, Thompson, Richard J., Jankowska, Irena, Shneider, Benjamin L., Sokal, Etienne, Grammatikopoulos, Tassos, Kadaristiana, Agustina, Jacquemin, Emmanuel, Spraul, Anne, Lipiński, Patryk, Czubkowski, Piotr, Rock, Nathalie, Shagrani, Mohammad, Broering, Dieter, Nicastro, Emanuele, Kelly, Deirdre, Nebbia, Gabriella, Arnell, Henrik, Fischler, Björn, Hulscher, Jan B.F., Serranti, Daniele, Arikan, Cigdem, Polat, Esra, Debray, Dominique, Lacaille, Florence, Goncalves, Cristina, Hierro, Loreto, Muñoz Bartolo, Gema, Mozer-Glassberg, Yael, Azaz, Amer, Brecelj, Jernej, Dezsőfi, Antal, Calvo, Pier Luigi, Grabhorn, Enke, Hartleif, Steffen, van der Woerd, Wendy J., Kamath, Binita M., Wang, Jian-She, Li, Liting, Durmaz, Özlem, Kerkar, Nanda, Jørgensen, Marianne Hørby, Fischer, Ryan, Jimenez-Rivera, Carolina, Alam, Seema, Cananzi, Mara, Laverdure, Noemie, Ferreira, Cristina Targa, Guerrero, Felipe Ordoñez, Wang, Heng, Sency, Valerie, Kim, Kyung Mo, Chen, Huey-Ling, de Carvalho, Elisa, Fabre, Alexandre, Bernabeu, Jesus Quintero, Zellos, Aglaia, Alonso, Estella M., Sokol, Ronald J., Suchy, Frederick J., Loomes, Kathleen M., McKiernan, Patrick J., Rosenthal, Philip, Turmelle, Yumirle, Horslen, Simon, Schwarz, Kathleen, Bezerra, Jorge A., Wang, Kasper, Hansen, Bettina E., and Verkade, Henkjan J.

Published
2023
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5. Kinesin family member 12‐related hepatopathy: A generally indolent disorder with elevated gamma‐glutamyl‐transferase activity.

Author

Vogel, Georg‐Friedrich, Podpeskar, Alexandra, Rieder, Dietmar, Salzer, Helin, Garczarczyk‐Asim, Dorota, Wang, Li, Abuduxikuer, Kuerbanjiang, Wang, Jian‐She, Scharrer, Anke, Faqeih, Eissa Ali, Aseeri, Ali T., Vodopiutz, Julia, Heilos, Andreas, Pichler, Judith, Huber, Wolf‐Dietrich, Müller, Thomas, Knisely, A. S., and Janecke, Andreas R.

Subjects
HEPATIC fibrosis, LIVER failure, CHILD patients, LIVER transplantation, LIVER diseases, GAMMA-glutamyltransferase
Abstract

Exome sequencing (ES) has identified biallelic kinesin family member 12 (KIF12) mutations as underlying neonatal cholestatic liver disease. We collected information on onset and progression of this entity. Among consecutively referred pediatric patients at our centers, diagnostic ES identified 4 patients with novel, biallelic KIF12 variants using the human GRCh38 reference sequence, as KIF12 remains incompletely annotated in the older reference sequence GRCh37. A review of these and of 21 reported patients with KIF12 variants found that presentation with elevated serum transaminase activity in the context of trivial respiratory infection, without clinical features of liver disease, was more common (n = 18) than manifest cholestatic disease progressing rapidly to liver transplantation (LT; n = 7). Onset of liver disease was at age <1 year in 15 patients; LT was more common in this group. Serum gamma‐glutamyl transpeptidase activity (GGT) was elevated in all patients, and total bilirubin was elevated in 15 patients. Liver fibrosis or cirrhosis was present in 14 of 18 patients who were biopsied. The 16 different pathogenic variants and 11 different KIF12 genotypes found were not correlated with age of onset or progression to LT. Identification of biallelic pathogenic KIF12 variants distinguishes KIF12‐related disease from other entities with elevated GGT. [ABSTRACT FROM AUTHOR]

Published
2024
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19. Natural History of Liver Disease in a Large International Cohort of Children with Alagille syndrome: Results from The <scp>GALA</scp> Study

Author

UCL - SSS/IREC/PEDI - Pôle de Pédiatrie, UCL - (SLuc) Service de gastro-entérologie et hépatologie pédiatrique, Vandriel, Shannon M., Li, Li‐Ting, She, Huiyu, Wang, Jian‐She, Gilbert, Melissa A., Jankowska, Irena, Czubkowski, Piotr, Gliwicz‐Miedzińska, Dorota, Gonzales, Emmanuel M., Jacquemin, Emmanuel, Bouligand, Jérôme, Spinner, Nancy B., Loomes, Kathleen M., Piccoli, David A., D'Antiga, Lorenzo, Nicastro, Emanuele, Sokal, Etienne, Demaret,Tanguy, Ebel, Noelle H., Feinstein, Jeffrey A., Fawaz, Rima, Nastasio, Silvia, Lacaille, Florence, Debray, Dominique, Arnell, Henrik, Fischler, Björn, Siew, Susan, Stormon, Michael, Karpen, Saul J., Romero, Rene, Kim, Kyung Mo, Baek, Woo Yim, Hardikar, Winita, Shankar, Sahana, Roberts, Amin J., Evans, Helen M., Jensen, M. Kyle, Kavan, Marianne, Sundaram, Shikha S., Chaidez, Alexander, Karthikeyan, Palaniswamy, Sanchez, Maria Camila, Cavalieri, Maria Lorena, Verkade, Henkjan J., Lee, Way Seah, Squires, James E., Hajinicolaou, Christina, Lertudomphonwanit, Chatmanee, Fischer, Ryan T., Larson‐Nath, Catherine, Mozer‐Glassberg, Yael, Arikan, Cigdem, Lin, Henry C., Quintero Bernabeu, Jesus, Alam, Seema, Kelly, Deirdre, Carvalho, Elisa, Ferreira, Cristina Targa, Indolfi, Giuseppe, Quiros‐Tejeira, Ruben E., Bulut, Pinar, Calvo, Pier Luigi, Önal, Zerrin, Valentino, Pamela L., Desai, Dev M., Eshun, John, Rogalidou, Maria, Dezsőfi, Antal, Wiecek, Sabina, Nebbia, Gabriella, Borges Pinto, Raquel, Wolters, Victorien M., Tamara, María Legarda, Zizzo, Andréanne N., Garcia, Jennifer, Schwarz, Kathleen, Beretta, Marisa, Sandahl, Thomas Damgaard, Jimenez‐Rivera, Carolina, Kerkar, Nanda, Brecelj, Jernej, Mujawar, Quais, Rock, Nathalie, Busoms, Cristina Molera, Karnsakul, Wikrom, Lurz, Eberhard, Santos‐Silva, Ermelinda, Blondet, Niviann, Bujanda, Luis, Shah, Uzma, Thompson, Richard J., Hansen, Bettina E., Kamath, Binita M., UCL - SSS/IREC/PEDI - Pôle de Pédiatrie, UCL - (SLuc) Service de gastro-entérologie et hépatologie pédiatrique, Vandriel, Shannon M., Li, Li‐Ting, She, Huiyu, Wang, Jian‐She, Gilbert, Melissa A., Jankowska, Irena, Czubkowski, Piotr, Gliwicz‐Miedzińska, Dorota, Gonzales, Emmanuel M., Jacquemin, Emmanuel, Bouligand, Jérôme, Spinner, Nancy B., Loomes, Kathleen M., Piccoli, David A., D'Antiga, Lorenzo, Nicastro, Emanuele, Sokal, Etienne, Demaret,Tanguy, Ebel, Noelle H., Feinstein, Jeffrey A., Fawaz, Rima, Nastasio, Silvia, Lacaille, Florence, Debray, Dominique, Arnell, Henrik, Fischler, Björn, Siew, Susan, Stormon, Michael, Karpen, Saul J., Romero, Rene, Kim, Kyung Mo, Baek, Woo Yim, Hardikar, Winita, Shankar, Sahana, Roberts, Amin J., Evans, Helen M., Jensen, M. Kyle, Kavan, Marianne, Sundaram, Shikha S., Chaidez, Alexander, Karthikeyan, Palaniswamy, Sanchez, Maria Camila, Cavalieri, Maria Lorena, Verkade, Henkjan J., Lee, Way Seah, Squires, James E., Hajinicolaou, Christina, Lertudomphonwanit, Chatmanee, Fischer, Ryan T., Larson‐Nath, Catherine, Mozer‐Glassberg, Yael, Arikan, Cigdem, Lin, Henry C., Quintero Bernabeu, Jesus, Alam, Seema, Kelly, Deirdre, Carvalho, Elisa, Ferreira, Cristina Targa, Indolfi, Giuseppe, Quiros‐Tejeira, Ruben E., Bulut, Pinar, Calvo, Pier Luigi, Önal, Zerrin, Valentino, Pamela L., Desai, Dev M., Eshun, John, Rogalidou, Maria, Dezsőfi, Antal, Wiecek, Sabina, Nebbia, Gabriella, Borges Pinto, Raquel, Wolters, Victorien M., Tamara, María Legarda, Zizzo, Andréanne N., Garcia, Jennifer, Schwarz, Kathleen, Beretta, Marisa, Sandahl, Thomas Damgaard, Jimenez‐Rivera, Carolina, Kerkar, Nanda, Brecelj, Jernej, Mujawar, Quais, Rock, Nathalie, Busoms, Cristina Molera, Karnsakul, Wikrom, Lurz, Eberhard, Santos‐Silva, Ermelinda, Blondet, Niviann, Bujanda, Luis, Shah, Uzma, Thompson, Richard J., Hansen, Bettina E., and Kamath, Binita M.

Abstract

Background: Alagille syndrome (ALGS) is a multisystem disorder, characterized by cholestasis. Existing outcome data are largely derived from tertiary centers and real-world data are lacking. This study aimed to elucidate the natural history of liver disease in a contemporary, international, cohort of children with ALGS. Methods: Multicenter retrospective study of children with a clinically and/or genetically confirmed ALGS diagnosis, born Jan-1997 - Aug-2019. Native liver survival (NLS) and event-free survival rates were assessed. Cox models were constructed to identify early biochemical predictors of clinically evident portal hypertension (CEPH) and NLS. Results: 1433 children (57% male) from 67 centers in 29 countries were included. 10 and 18-years NLS rates were 54.4% and 40.3%. By 10 and 18-years, 51.5% and 66.0% of ALGS children experienced ≥1 adverse liver-related event (CEPH, transplant or death). Children (>6 and ≤12 months) with median total bilirubin (TB) levels between ≥5.0 and <10.0 mg/dL had a 4.1-fold (95% CI 1.6 - 10.8) and those ≥10.0 mg/dL had an 8.0-fold (95% CI 3.4 - 18.4) increased risk of developing CEPH compared with those <5.0 mg/dL. Median TB levels between ≥5.0 and <10.0 mg/dL and >10.0 mg/dL were associated with a 4.8 (95% CI 2.4 - 9.7) and 15.6 (95% CI 8.7 - 28.2) increased risk of transplantation relative to <5.0 mg/dL. Median TB <5.0 mg/dL were associated with higher NLS rates relative to ≥5.0 mg/dL, with 79% reaching adulthood with native liver (p<0.001). Conclusions: In this large international cohort of ALGS, only 40.3% of children reach adulthood with their native liver. A TB <5.0 mg/dL between 6-and-12-months of age is associated with better hepatic outcomes. These thresholds provide clinicians with an objective tool to assist with clinical decision-making and in the evaluation of novel therapies.

Published
2023

20. Genotype-phenotype relationships of truncating mutations, p.E297G and p.D482G in bile salt export pump deficiency

Author

UCL - SSS/IREC/PEDI - Pôle de Pédiatrie, UCL - (SLuc) Service de gastro-entérologie et hépatologie pédiatrique, Felzen, Antonia, van Wessel, Daan B.E., Gonzales, Emmanuel, Thompson, Richard J., Jankowska, Irena, Shneider, Benjamin L., Sokal, Etienne, Grammatikopoulos, Tassos, Kadaristiana, Agustina, Jacquemin, Emmanuel, Spraul, Anne, Lipiński, Patryk, Czubkowski, Piotr, Rock, Nathalie, Shagrani, Mohammad, Broering, Dieter, Nicastro, Emanuele, Kelly, Deirdre, Nebbia, Gabriella, Arnell, Henrik, Fischler, Björn, Hulscher, Jan B.F., Serranti, Daniele, Arikan, Cigdem, Polat, Esra, Debray, Dominique, Lacaille, Florence, Goncalves, Cristina, Hierro, Loreto, Muñoz Bartolo, Gema, Mozer-Glassberg, Yael, Azaz, Amer, Brecelj, Jernej, Dezsőfi, Antal, Calvo, Pier Luigi, Grabhorn, Enke, Hartleif, Steffen, van der Woerd, Wendy J., Kamath, Binita M., Wang, Jian-She, Li, Liting, Durmaz, Özlem, Kerkar, Nanda, Jørgensen, Marianne Hørby, Fischer, Ryan, Jimenez-Rivera, Carolina, Alam, Seema, Cananzi, Mara, Laverdure, Noemie, Ferreira, Cristina Targa, Guerrero, Felipe Ordoñez, Wang, Heng, Sency, Valerie, Kim, Kyung Mo, Chen, Huey-Ling, de Carvalho, Elisa, Fabre, Alexandre, Bernabeu, Jesus Quintero, Zellos, Aglaia, Alonso, Estella M., Sokol, Ronald J., Suchy, Frederick J., Loomes, Kathleen M., McKiernan, Patrick J., Rosenthal, Philip, Turmelle, Yumirle, Horslen, Simon, Schwarz, Kathleen, Bezerra, Jorge A., Wang, Kasper, Hansen, Bettina E., Verkade, Henkjan J., UCL - SSS/IREC/PEDI - Pôle de Pédiatrie, UCL - (SLuc) Service de gastro-entérologie et hépatologie pédiatrique, Felzen, Antonia, van Wessel, Daan B.E., Gonzales, Emmanuel, Thompson, Richard J., Jankowska, Irena, Shneider, Benjamin L., Sokal, Etienne, Grammatikopoulos, Tassos, Kadaristiana, Agustina, Jacquemin, Emmanuel, Spraul, Anne, Lipiński, Patryk, Czubkowski, Piotr, Rock, Nathalie, Shagrani, Mohammad, Broering, Dieter, Nicastro, Emanuele, Kelly, Deirdre, Nebbia, Gabriella, Arnell, Henrik, Fischler, Björn, Hulscher, Jan B.F., Serranti, Daniele, Arikan, Cigdem, Polat, Esra, Debray, Dominique, Lacaille, Florence, Goncalves, Cristina, Hierro, Loreto, Muñoz Bartolo, Gema, Mozer-Glassberg, Yael, Azaz, Amer, Brecelj, Jernej, Dezsőfi, Antal, Calvo, Pier Luigi, Grabhorn, Enke, Hartleif, Steffen, van der Woerd, Wendy J., Kamath, Binita M., Wang, Jian-She, Li, Liting, Durmaz, Özlem, Kerkar, Nanda, Jørgensen, Marianne Hørby, Fischer, Ryan, Jimenez-Rivera, Carolina, Alam, Seema, Cananzi, Mara, Laverdure, Noemie, Ferreira, Cristina Targa, Guerrero, Felipe Ordoñez, Wang, Heng, Sency, Valerie, Kim, Kyung Mo, Chen, Huey-Ling, de Carvalho, Elisa, Fabre, Alexandre, Bernabeu, Jesus Quintero, Zellos, Aglaia, Alonso, Estella M., Sokol, Ronald J., Suchy, Frederick J., Loomes, Kathleen M., McKiernan, Patrick J., Rosenthal, Philip, Turmelle, Yumirle, Horslen, Simon, Schwarz, Kathleen, Bezerra, Jorge A., Wang, Kasper, Hansen, Bettina E., and Verkade, Henkjan J.

Abstract

Background & aims: Bile salt export pump (BSEP) deficiency frequently necessitates liver transplantation in childhood. In contrast to two predicted protein truncating mutations (PPTMs), homozygous p.D482G or p.E297G mutations are associated with relatively mild phenotypes, responsive to surgical interruption of the enterohepatic circulation (siEHC). The phenotype of patients with a compound heterozygous genotype of one p.D482G or p.E297G mutation and one PPTM has remained unclear. We aimed to assess their genotype-phenotype relationship. Methods: From the NAPPED database, we selected patients with homozygous p.D482G or p.E297G mutations (BSEP1/1; n = 31), with one p.D482G or p.E297G, and one PPTM (BSEP1/3; n = 30), and with two PPTMs (BSEP3/3; n = 77). We compared clinical presentation, native liver survival (NLS), and the effect of siEHC on NLS. Results: The groups had a similar median age at presentation (0.7-1.3 years). Overall NLS at age 10 years was 21% in BSEP1/3 vs. 75% in BSEP1/1 and 23% in BSEP3/3 (p <0.001). Without siEHC, NLS in the BSEP1/3 group was similar to that in BSEP3/3, but considerably lower than in BSEP1/1 (at age 10 years: 38%, 30%, and 71%, respectively; p = 0.003). After siEHC, BSEP1/3 and BSEP3/3 were associated with similarly low NLS, while NLS was much higher in BSEP1/1 (10 years after siEHC, 27%, 14%, and 92%, respectively; p <0.001). Conclusions: Individuals with BSEP deficiency with one p.E297G or p.D482G mutation and one PPTM have a similarly severe disease course and low responsiveness to siEHC as those with two PPTMs. This identifies a considerable subgroup of patients who are unlikely to benefit from interruption of the enterohepatic circulation by either surgical or ileal bile acid transporter inhibitor treatment. Impact and implications: This manuscript defines the clinical features and prognosis of individuals with BSEP deficiency involving the combination of one relatively mild and one very severe BSEP deficiency mutation. Until

Published
2023

21. Genotype-phenotype relationships of truncating mutations, p.E297G and p.D482G in bile salt export pump deficiency

Author

Arıkan, Çiğdem (ORCID 0000-0002-0794-2741 & YÖK ID 240198), Felzen, Antonia; van Wessel, Daan B.E.; Gonzales, Emmanuel; Thompson, Richard J.; Jankowska, Irena; Shneider, Benjamin L.; Sokal, Etienne; Grammatikopoulos, Tassos; Kadaristiana, Agustina; Jacquemin, Emmanuel; Spraul, Anne; Lipi?ski, Patryk; Czubkowski, Piotr; Rock, Nathalie; Shagrani, Mohammad; Broering, Dieter; Nicastro, Emanuele; Kelly, Deirdre; Nebbia, Gabriella; Arnell, Henrik; Fischler, Björn; Hulscher, Jan B.F.; Serranti, Daniele; Polat, Esra; Debray, Dominique; Lacaille, Florence; Goncalves, Cristina; Hierro, Loreto; Muñoz Bartolo, Gema; Mozer-Glassberg, Yael; Azaz, Amer; Brecelj, Jernej; Dezs?fi, Antal; Calvo, Pier Luigi; Grabhorn, Enke; Hartleif, Steffen; van der Woerd, Wendy J.; Kamath, Binita M.; Wang, Jian-She; Li, Liting; Durmaz, Özlem; Kerkar, Nanda; Jørgensen, Marianne Hørby; Fischer, Ryan; Jimenez-Rivera, Carolina; Alam, Seema; Cananzi, Mara; Laverdure, Noemie; Ferreira, Cristina Targa; Guerrero, Felipe Ordoñez; Wang, Heng; Sency, Valerie; Kim, Kyung Mo; Chen, Huey-Ling; de Carvalho, Elisa; Fabre, Alexandre; Bernabeu, Jesus Quintero; Zellos, Aglaia; Alonso, Estella M.; Sokol, Ronald J.; Suchy, Frederick J.; Loomes, Kathleen M.; McKiernan, Patrick J.; Rosenthal, Philip; Turmelle, Yumirle; Horslen, Simon; Schwarz, Kathleen; Bezerra, Jorge A.; Wang, Kasper; Hansen, Bettina E.; Verkade, Henkjan J., Koç University Research Center for Translational Medicine (KUTTAM) / Koç Üniversitesi Translasyonel Tıp Araştırma Merkezi (KUTTAM), School of Medicine, Arıkan, Çiğdem (ORCID 0000-0002-0794-2741 & YÖK ID 240198), Felzen, Antonia; van Wessel, Daan B.E.; Gonzales, Emmanuel; Thompson, Richard J.; Jankowska, Irena; Shneider, Benjamin L.; Sokal, Etienne; Grammatikopoulos, Tassos; Kadaristiana, Agustina; Jacquemin, Emmanuel; Spraul, Anne; Lipi?ski, Patryk; Czubkowski, Piotr; Rock, Nathalie; Shagrani, Mohammad; Broering, Dieter; Nicastro, Emanuele; Kelly, Deirdre; Nebbia, Gabriella; Arnell, Henrik; Fischler, Björn; Hulscher, Jan B.F.; Serranti, Daniele; Polat, Esra; Debray, Dominique; Lacaille, Florence; Goncalves, Cristina; Hierro, Loreto; Muñoz Bartolo, Gema; Mozer-Glassberg, Yael; Azaz, Amer; Brecelj, Jernej; Dezs?fi, Antal; Calvo, Pier Luigi; Grabhorn, Enke; Hartleif, Steffen; van der Woerd, Wendy J.; Kamath, Binita M.; Wang, Jian-She; Li, Liting; Durmaz, Özlem; Kerkar, Nanda; Jørgensen, Marianne Hørby; Fischer, Ryan; Jimenez-Rivera, Carolina; Alam, Seema; Cananzi, Mara; Laverdure, Noemie; Ferreira, Cristina Targa; Guerrero, Felipe Ordoñez; Wang, Heng; Sency, Valerie; Kim, Kyung Mo; Chen, Huey-Ling; de Carvalho, Elisa; Fabre, Alexandre; Bernabeu, Jesus Quintero; Zellos, Aglaia; Alonso, Estella M.; Sokol, Ronald J.; Suchy, Frederick J.; Loomes, Kathleen M.; McKiernan, Patrick J.; Rosenthal, Philip; Turmelle, Yumirle; Horslen, Simon; Schwarz, Kathleen; Bezerra, Jorge A.; Wang, Kasper; Hansen, Bettina E.; Verkade, Henkjan J., Koç University Research Center for Translational Medicine (KUTTAM) / Koç Üniversitesi Translasyonel Tıp Araştırma Merkezi (KUTTAM), and School of Medicine

Abstract

Background & Aims: bile salt export pump (BSEP) deficiency frequently necessitates liver transplantation in childhood. In contrast to two predicted protein truncating mutations (PPTMs), homozygous p.D482G or p.E297G mutations are associated with relatively mild phenotypes, responsive to surgical interruption of the enterohepatic circulation (siEHC). The phenotype of patients with a compound heterozygous genotype of one p.D482G or p.E297G mutation and one PPTM has remained unclear. We aimed to assess their genotype-phenotype relationship. Methods: from the NAPPED database, we selected patients with homozygous p.D482G or p.E297G mutations (BSEP1/1; n = 31), with one p.D482G or p.E297G, and one PPTM (BSEP1/3; n = 30), and with two PPTMs (BSEP3/3; n = 77). We compared clinical presentation, native liver survival (NLS), and the effect of siEHC on NLS. Results: the groups had a similar median age at presentation (0.7-1.3 years). Overall NLS at age 10 years was 21% in BSEP1/3 vs. 75% in BSEP1/1 and 23% in BSEP3/3 (p <0.001). Without siEHC, NLS in the BSEP1/3 group was similar to that in BSEP3/3, but considerably lower than in BSEP1/1 (at age 10 years: 38%, 30%, and 71%, respectively; p = 0.003). After siEHC, BSEP1/3 and BSEP3/3 were associated with similarly low NLS, while NLS was much higher in BSEP1/1 (10 years after siEHC, 27%, 14%, and 92%, respectively; p <0.001). Conclusions: individuals with BSEP deficiency with one p.E297G or p.D482G mutation and one PPTM have a similarly severe disease course and low responsiveness to siEHC as those with two PPTMs. This identifies a considerable subgroup of patients who are unlikely to benefit from interruption of the enterohepatic circulation by either surgical or ileal bile acid transporter inhibitor treatment. Impact and implications: this manuscript defines the clinical features and prognosis of individuals with BSEP deficiency involving the combination of one relatively mild and one very severe BSEP deficiency mutation. Until, 1. MD/PhD scholarship from the University of Groningen, Groningen, The Netherlands 2. ESPGHAN Networking Grant 2019 3. ChiLDReN and CTSA National Institutes of Health grants: Ann & Robert H. Lurie Children's Hospital, Chicago: U01DK062436; University of Colorado, Denver: U01DK62453, UL1 TR002535; Baylor college of Medicine, Houston: U01DK103149; Children's Hospital of Philadelphia, Philadelphia: U01DK062481, UL1TR000003; Children's Hospital of Pittsburgh, Pittsburgh: U01DK062466; University of California, San Francisco U01DK062500; University of California, San Francisco CTSI grant UL1TR001872; Riley Hospital for Children, Indianapolis: U01DK084536; Seattle Children’s Hospital, Seattle: DK084575; Children’s Hospital Los Angeles, California: U01DK084538. 4. Unrestrictive research grant from Albireo 5. Unrestrictive research grant from Mirum Pharmaceuticals. 6. C&W de Boer Stichting research grant.

Published
2023

24. Recurrent AKR1D1 c.580-13T>A Variant

Author

Zhao, Jing, primary, Qiu, Yi-ling, additional, Wang, Li, additional, Li, Zhong-die, additional, Xie, Xin-bao, additional, Lu, Yi, additional, Setchell, Kenneth D.R., additional, Cheng, Ye, additional, Xing, Qing-he, additional, and Wang, Jian-She, additional

Published
2023
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26. Balanced Translocation Disrupting JAG1 Identified by Optical Genomic Mapping in Suspected Alagille Syndrome

Author

Zhang, Yi-Qiong, Gao, Peng-Fei, Yang, Jing-Min, Zhang, Jing, Lu, Yu-Lan, and Wang, Jian-She

Abstract

We report the clinical and genetic features of a Han Chinese boy who presented with disease suspect for Alagille syndrome (ALGS). Multiple genetic analyses (panel sequencing, multiplex-ligation-dependent probe amplification, and whole genome sequencing) failed to uncover a causative variant. Optical genomic mapping detected a reciprocal translocation between chromosomes 4 and 20, interrupting JAG1. Long-range polymerase chain reaction and targeted sequencing identified the exact breakpoints. Sanger sequencing and reanalysis of genome sequencing raw data further confirmed the result. This translocation is expected to generate aberrant JAG1 transcripts that lead to complete loss of JAG1 expression. This is the first t(4;20)(q22.1;p12.2) balanced translocation detected by optical genomic mapping and characterized at base-pair resolution in ALGS. Our approach permitted precise diagnosis and genetic counseling.

Published
2023
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28. Splicing Analysis of MYO5B Noncanonical Variants in Patients with Low Gamma-Glutamyltransferase Cholestasis.

Author

Wang, Li, Qiu, Yi-Ling, Abuduxikuer, Kuerbanjiang, Wang, Neng-Li, Li, Zhong-Die, Cheng, Ye, Lu, Yi, Xie, Xin-Bao, Xing, Qing-He, and Wang, Jian-She

Abstract

Biallelic MYO5B variants have been associated with familial intrahepatic cholestasis (FIC) with low serum gamma-glutamyltransferase (GGT). Intronic or synonymous variants outside of canonical splice sites (hereinafter referred to as noncanonical variants) with uncertain significance were identified in MYO5B posing a challenge in clinical interpretation. This study is aimed at assessing the effects of these variants on premessenger RNA (pre-mRNA) splicing to improve recognition of pathogenic spliceogenic variants in MYO5B and better characterize the MYO5B genetic variation spectrum. Disease-associated MYO5B noncanonical variants were collected from the literature or newly identified low GGT cholestasis patients. In silico splicing predictions were performed to prioritize potential pathogenic variants. Minigene splicing assays were performed to determine their splicing patterns, with confirmation by blood RNA analysis in one case. Eleven (five novel) noncanonical variants with uncertain significance were identified. Minigene splicing assays revealed that three variants (c.2090+3A>T, c.2414+5G>T, and c.613-11G>A) caused complete aberrations, five variants (c.2349A>G/p.(=), c.4221G>A/p.(=), c.1322+5G>A, c.1669-35A>C, and c.3045+3A>T) caused predominant aberrations, and three variants (c.4852+11A>G, c.455+8T>C, and c.2415-6C>G) had no effect on pre-mRNA splicing. Patient-derived RNA analysis showed consistent results. Based on our results, eight variants were reclassified as likely pathogenic and three as likely benign. Combining the clinical features and the above analysis, the diagnosis of MYO5B-associated FIC could be made in three new patients. In conclusion, we characterized the splicing patterns of MYO5B noncanonical variants and suggest that RNA analysis should be routinely included in clinical diagnostics to provide essential evidence for the interpretation of variants. [ABSTRACT FROM AUTHOR]

Published
2023
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36. A Molecular Mechanism Underlying Genotype-Specific Intrahepatic Cholestasis Resulting From MYO5B Mutations

Author

Overeem, Arend W., Li, Qinghong, Qiu, Yi-Ling, Cartón-Garcia, Fernando, Leng, Changsen, Klappe, Karin, Dronkers, Just, Hsiao, Nai-Hua, Wang, Jian-She, Arango, Diego, van Ijzendoorn, Sven C. D., Universitat Autònoma de Barcelona, Center for Liver, Digestive and Metabolic Diseases (CLDM), and Groningen Institute for Gastro Intestinal Genetics and Immunology (3GI)

Subjects
0301 basic medicine, Genotype, Endosome, Mutant, Myosin Type V, Cholestasis, Intrahepatic, medicine.disease_cause, Pediatrics, Frameshift mutation, 03 medical and health sciences, 0302 clinical medicine, Tumor Cells, Cultured, medicine, Genetics, Missense mutation, Humans, FAILURE, TRAFFICKING, RAB11A, Mutation, MYO5B protein, Human, Myosin Heavy Chains, Hepatology, Chemistry, MYOSIN VB, Progressive familial intrahepatic cholestasis, MICROVILLUS INCLUSION DISEASE, Cholestasis, Progressive familial intrahepatic, Original Articles, medicine.disease, Protein subcellular localization prediction, TRANSPORT, EXPORT, Cell biology, 030104 developmental biology, Lipid metabolism, Metabolism, 030211 gastroenterology & hepatology, Original Article
Abstract

Altres ajuts: Supported by grants from the Nederlandse vereniging voor Gastroenterologie (to S. I. J.) and the Natural Science Foundation of China, Nos. 81873543 and 81570468 (to J. S. W.). Progressive familial intrahepatic cholestasis (PFIC) 6 has been associated with missense but not biallelic nonsense or frameshift mutations in MYO5B, encoding the motor protein myosin Vb (myoVb). This genotype-phenotype correlation and the mechanism through which MYO5B mutations give rise to PFIC are not understood. The aim of this study was to determine whether the loss of myoVb or expression of patient-specific myoVb mutants can be causally related to defects in canalicular protein localization and, if so, through which mechanism. We demonstrate that the cholestasis-associated substitution of the proline at amino acid position 600 in the myoVb protein to a leucine (P660L) caused the intracellular accumulation of bile canalicular proteins in vesicular compartments. Remarkably, the knockout of MYO5B in vitro and in vivo produced no canalicular localization defects. In contrast, the expression of myoVb mutants consisting of only the tail domain phenocopied the effects of the Myo5b-P660L mutation. Using additional myoVb and rab11a mutants, we demonstrate that motor domain-deficient myoVb inhibited the formation of specialized apical recycling endosomes and that its disrupting effect on the localization of canalicular proteins was dependent on its interaction with active rab11a and occurred at the trans -Golgi Network/recycling endosome interface. Our results reveal a mechanism through which MYO5B motor domain mutations can cause the mislocalization of canalicular proteins in hepatocytes which, unexpectedly, does not involve myoVb loss-of-function but, as we propose, a rab11a-mediated gain-of-toxic function. The results explain why biallelic MYO5B mutations that affect the motor domain but not those that eliminate myoVb expression are associated with PFIC6.

Published
2020

40. Impact of Genotype, Serum Bile Acids, and Surgical Biliary Diversion on Native Liver Survival in FIC1 Deficiency

Author

van Wessel, Daan B. E. Thompson, Richard J. Gonzales, Emmanuel and Jankowska, Irena Shneider, Benjamin L. Sokal, Etienne and Grammatikopoulos, Tassos Kadaristiana, Agustina Jacquemin, Emmanuel Spraul, Anne Lipinski, Patryk Czubkowski, Piotr and Rock, Nathalie Shagrani, Mohammad Broering, Dieter Algoufi, Talal Mazhar, Nejat Nicastro, Emanuele Kelly, Deirdre and Nebbia, Gabriella Arnell, Henrik Fischler, Bjorn Hulscher, Jan B. F. Serranti, Daniele Arikan, Cigdem Debray, Dominique and Lacaille, Florence Goncalves, Cristina Hierro, Loreto and Bartolo, Gema Munoz Mozer-Glassberg, Yael Azaz, Amer and Brecelj, Jernej Dezsofi, Antal Calvo, Pier Luigi and Krebs-Schmitt, Dorothee Hartleif, Steffen van der Woerd, Wendy L. Wang, Jian-She Li, Li-Ting Durmaz, Ozlem Kerkar, Nanda Jorgensen, Marianne Horby Fischer, Ryan and Jimenez-Rivera, Carolina Alam, Seema Cananzi, Mara and Laverdure, Noemie Ferreira, Cristina Targa Ordonez, Felipe and Wang, Heng Sency, Valerie Kim, Kyung Mo Chen, Huey-Ling and Carvalho, Elisa Fabre, Alexandre Bernabeu, Jesus Quintero and Alonso, Estella M. Sokol, Ronald J. Suchy, Frederick J. and Loomes, Kathleen M. McKiernan, Patrick J. Rosenthal, Philip and Turmelle, Yumirle Rao, Girish S. Horslen, Simon Kamath, Binita M. Rogalidou, Maria Karnsakul, Wikrom W. Hansen, Bettina Verkade, Henkjan J. Nat Course Prognosis PFIC Effect B

Abstract

BACKGROUND AND AIMS: Mutations in ATPase phospholipid transporting 8B1 (ATP8B1) can lead to familial intrahepatic cholestasis type 1 (FIC1) deficiency, or progressive familial intrahepatic cholestasis type 1. The rarity of FIC1 deficiency has largely prevented a detailed analysis of its natural history, effects of predicted protein truncating mutations (PPTMs), and possible associations of serum bile acid (sBA) concentrations and surgical biliary diversion (SBD) with long-term outcome. We aimed to provide insights by using the largest genetically defined cohort of patients with FIC1 deficiency to date. APPROACH AND RESULTS: This multicenter, combined retrospective and prospective study included 130 patients with compound heterozygous or homozygous predicted pathogenic ATP8B1 variants. Patients were categorized according to the number of PPTMs (i.e., splice site, frameshift due to deletion or insertion, nonsense, duplication), FIC1-A (n = 67; no PPTMs), FIC1-B (n = 29; one PPTM), or FIC1-C (n = 34; two PPTMs). Survival analysis showed an overall native liver survival (NLS) of 44% at age 18 years. NLS was comparable among FIC1-A, FIC1-B, and FIC1-C (% NLS at age 10 years: 67%, 41%, and 59%, respectively; P = 0.12), despite FIC1-C undergoing SBD less often (% SBD at age 10 years: 65%, 57%, and 45%, respectively; P = 0.03). sBAs at presentation were negatively associated with NLS (NLS at age 10 years, sBAs < 194 mu mol/L: 49% vs. sBAs >= 194 mu mol/L: 15%; P = 0.03). SBD decreased sBAs (230 [125-282] to 74 [11-177] mu mol/L; P = 0.005). SBD (HR 0.55, 95% CI 0.28-1.03, P = 0.06) and post-SBD sBA concentrations < 65 mu mol/L (P = 0.05) tended to be associated with improved NLS. CONCLUSIONS: Less than half of patients with FIC1 deficiency reach adulthood with native liver. The number of PPTMs did not associate with the natural history or prognosis of FIC1 deficiency. sBA concentrations at initial presentation and after SBD provide limited prognostic information on long-term NLS.

Published
2021

41. Additional file 2 of Genetic spectrum and clinical characteristics of 3β-hydroxy-Δ5-C27-steroid oxidoreductase (HSD3B7) deficiency in China

Author

Zhao, Jing, Setchell, Kenneth D. R., Gong, Ying, Sun, Yinghua, Zhang, Ping, Heubi, James E., Fang, Lingjuan, Lu, Yi, Xie, Xinbao, Gong, Jingyu, and Wang, Jian-She

Abstract

Additional file 2. Table S1. Pathogenicity prediction of novel variants in HSD3B7; Table S2. Previously reported variants in HSD3B7; Table S3. Serum liver biochemistries at first referral and at last follow-up; Table S4. Correlation of genotype and phenotype in patients with HSD3B7 deficiency.

Published
2021
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44. Circuit model for shaft voltage prediction in induction motors fed by PWM-based AC drives

Author

Naik, Rajendra, Nondahl, Thomas A., Melfi, Michael J., Schiferl, Rich, and Wang, Jian-She

Subjects
Voltage -- Testing, Induction electric motors -- Evaluation, Circuit analyzer, Business, Computers, Electronics, Electronics and electrical industries
Abstract

The development of high-frequency pulsewidth-modulation-based adjustable-speed drives (ASDs) has increased the efficiency, performance, and controllability in induction motor applications. However, the high switching frequencies and the faster switching times of insulated gate bipolar transistors (the device of choice in these ASDs) introduce disadvantages like overvoltages at the motor terminals when long cables are used between the drive and the motor. Another industry-wide concern is the generation of rotor shaft voltage and the resulting bearing current. The grease film in a bearing acts as a capacitor that charges due to the transitions in the common-mode voltage imposed at the motor terminals by the drive. The breakdown of the film causes a spike of current to flow that can damage the bearing and reduce life. A significant amount of effort has been directed at understanding the shaft voltage phenomenon and the associated bearing current. This paper attempts to develop circuit models to predict the level of the shaft voltage. The circuit models can then be used to predict the shaft voltage levels at different installations, using simulation software like PSpice. Circuit models for two specific motors are developed. The predicted shaft voltage is very close to the actual voltage levels seen on the shaft when the motors are operated by ASDs. Index Terms--Bearing current, circuit model, motor parasitic impedance, shaft voltage.

Published
2003

47. Biallelic loss-of-function ZFYVE19 mutations are associated with congenital hepatic fibrosis, sclerosing cholangiopathy and high-GGT cholestasis

Author

Luan, Weisha, primary, Hao, Chen-Zhi, additional, Li, Jia-Qi, additional, Wei, Qing, additional, Gong, Jing-Yu, additional, Qiu, Yi-Ling, additional, Lu, Yi, additional, Shen, Cong-Huan, additional, Xia, Qiang, additional, Xie, Xin-Bao, additional, Zhang, Mei-Hong, additional, Abuduxikuer, Kuerbanjiang, additional, Li, Zhong-Die, additional, Wang, Li, additional, Xing, Qing-He, additional, Knisely, A S, additional, and Wang, Jian-She, additional

Published
2020
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49. A numerical investigation of the penalty H-formulation for nonlinear time-harmonic magnetic computation

Author

Wang, Jian-She

Subjects
Eddy currents (Electric) -- Research, Finite element method -- Usage, Harmonic analysis -- Evaluation, Magnetic fields -- Analysis, Business, Electronics, Electronics and electrical industries
Abstract

In this paper, the penalized H-formulation, which has been shown by recent research as a promising alternative to vector potential methods, is implemented for simulating 3D time-harmonic eddy current diffusion. Compared to a rigorous time-stepping approach, the present nonlinear time-harmonic FEM procedure can predict global time-average forces and losses with acceptable engineering accuracy, and yet at much reduced computational cost. The procedure is validated with examples involving linear and nonlinear conductors. Index Terms - Eddy currents, nonlinear magnetics, harmonic analysis, finite element methods.

Published
1999

50. PS-195-Predicting long-term outcome after surgical biliary diversion in Bsep-deficiency patients: Results from the NAPPED consortium

Author

Wessel, Daan van, Thompson, Richard, Grammatikopoulos, Tassos, Kadaristiana, Agustina, Jankowska, Irena, Lipiński, Patryk, Czubkowski, Piotr, Gonzales, Emmanuel, Jacquemin, Emmanuel, Spraul, Anne, Sokal, Etienne, Shagrani, Mohammad Ali, Broering, Dieter Clemens, Algoufi, Talal, Mazhar, Nejat, Nicastro, Emanuele, Kelly, Deirdre, Nebbia, Gabriella, Arnell, Henrik, Fischler, Björn, Hulscher, JBF, Serranti, Daniele, Arıkan, Cigdem, Polat, Esra, Debray, Dominique, Lacaille, Florence, Gonçalves, Cristina, Hierro, Loreto, Bartolo, Gema Muñoz, Mozer-Glassberg, Yael, Azaz, Amer, Brecelj, Jernej, Dezsőfi, Antal, Calvo, Pier Luigi, Grabhorn, Enke, Sturm, Ekkehard, Woerd, Wendy van der, Kamath, Binita M., Wang, Jian-She, Liting, Li, Durmaz, Ozlem, Hansen, Bettina, Verkade, Henkjan, The International Liver Congress (EASL), UCL - SSS/IREC/PEDI - Pôle de Pédiatrie, and UCL - (SLuc) Service de gastro-entérologie et hépatologie pédiatrique

Subjects
Pediatrics, medicine.medical_specialty, Hepatology, business.industry, medicine, business, Outcome (game theory), Term (time)
Published
2019

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