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Masuya R, Muraji T, Kanaan SB, Harumatsu T, Muto M, Toma M, Yanai T, Stevens AM, Nelson JL, Nakame K, Nanashima A, Ieiri S. Circulating maternal chimeric cells have an impact on the outcome of biliary atresia. Front Pediatr 2022; 10:1007927. [PMID: 36204668 PMCID: PMC9530628 DOI: 10.3389/fped.2022.1007927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 09/05/2022] [Indexed: 11/13/2022] Open
Abstract
INTRODUCTION We aimed to quantify the DNA of maternal chimeric (MC) cells in the peripheral blood of the BA patients and investigated the impact on the outcome. METHODS Patients with progressive jaundice because of no bile flow, which necessitated liver transplantation, or who showed inadequate bile flow with or without episodes of cholangitis and progressive hepatic fibrosis and portal hypertension were classified into the poor group. Those with adequate bile flow with completely normal liver function tests beyond 2 years were classified into the good group. The qPCR were separately carried out in buffy coat samples and plasma samples, targeting the non-inherited maternal HLA alleles in the DNA samples. RESULTS MC-DNA was present in the buffy coat (10-328 gEq per 106 host cells) in seven patients. There was no MC-DNA in the remaining five patients. MC-DNA (214-15,331 gEq per 106 host cells) was observed in the plasma of five patients. The quantity of MC-DNA in the buffy coat showed a significant difference between the two prognostic groups (p = 0.018), whereas there was no significant difference in the quantity of MC-DNA in plasma (p = 0.205). MC-DNA in the buffy coat was significantly associated with the outcome (p = 0.028), whereas MC-DNA in the plasma did not influence the outcome (p = 0.56). CONCLUSIONS Poor outcomes in BA were correlated with circulating maternal chimeric lymphocytes.
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Affiliation(s)
- Ryuta Masuya
- Division of the Gastrointestinal, Endocrine and Pediatric Surgery, Department of Surgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.,Department of Pediatric Surgery, Research Field in Medicine and Health Sciences, Medical and Dental Sciences Area, Research and Education Assembly, Kagoshima University, Kagoshima, Japan
| | - Toshihiro Muraji
- Department of Pediatric Surgery, Research Field in Medicine and Health Sciences, Medical and Dental Sciences Area, Research and Education Assembly, Kagoshima University, Kagoshima, Japan
| | - Sami B Kanaan
- Research and Development, Chimerocyte, Inc., Seattle, WA, United States.,Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, United States
| | - Toshio Harumatsu
- Department of Pediatric Surgery, Research Field in Medicine and Health Sciences, Medical and Dental Sciences Area, Research and Education Assembly, Kagoshima University, Kagoshima, Japan
| | - Mitsuru Muto
- Department of Pediatric Surgery, Research Field in Medicine and Health Sciences, Medical and Dental Sciences Area, Research and Education Assembly, Kagoshima University, Kagoshima, Japan
| | - Miki Toma
- Department of Pediatric Surgery, Ibaraki Children's Hospital, Mito, Japan
| | - Toshihiro Yanai
- Department of Pediatric Surgery, Ibaraki Children's Hospital, Mito, Japan
| | - Anne M Stevens
- Seattle Children's Research Institute, University of Washington, Seattle, WA, United States
| | - J Lee Nelson
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, United States
| | - Kazuhiko Nakame
- Division of the Gastrointestinal, Endocrine and Pediatric Surgery, Department of Surgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.,Department of Pediatric Surgery, Research Field in Medicine and Health Sciences, Medical and Dental Sciences Area, Research and Education Assembly, Kagoshima University, Kagoshima, Japan
| | - Atsushi Nanashima
- Division of Hepato-Biliary-Pancreatic Surgery, Department of Surgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Satoshi Ieiri
- Department of Pediatric Surgery, Research Field in Medicine and Health Sciences, Medical and Dental Sciences Area, Research and Education Assembly, Kagoshima University, Kagoshima, Japan
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Muraji T, Masuya R, Harumatsu T, Kawano T, Muto M, Ieiri S. New insights in understanding biliary atresia from the perspectives on maternal microchimerism. Front Pediatr 2022; 10:1007987. [PMID: 36210938 PMCID: PMC9539747 DOI: 10.3389/fped.2022.1007987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 09/02/2022] [Indexed: 11/13/2022] Open
Abstract
Biliary atresia (BA) is a fibroinflammatory cholangiopathy and portal venopathy. It is of unknown etiology and is associated with systemic immune dysregulation, in which the first insult begins before birth. Maternal microchimerism is a naturally occurring phenomenon during fetal life in which maternal alloantigens promote the development of tolerogenic fetal regulatory T-cells in utero. However, maternal cells may alter the fetus's response to self-antigens and trigger an autoimmune response under certain histocompatibility combinations between the mother and the fetus. A recent report on a set of dizygotic discordant twins with BA, one of whose placentae showed villitis of unknown etiology, implies a certain immune-mediated conflict between the fetus with BA and the mother. Maternal chimeric cells persist postnatally for various time spans and can cause cholangitis, which ultimately leads to liver failure. In contrast, patients who eliminate maternal chimeric cells may retain their liver function.
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Affiliation(s)
- Toshihiro Muraji
- Department of Pediatric Surgery, Research Field in Medicine and Health Sciences, Medical and Dental Sciences Area, Research and Education Assembly, Kagoshima University, Kagoshima, Japan
| | - Ryuta Masuya
- Division of the Gastrointestinal, Endocrine and Pediatric Surgery, Department of Surgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Toshio Harumatsu
- Department of Pediatric Surgery, Research Field in Medicine and Health Sciences, Medical and Dental Sciences Area, Research and Education Assembly, Kagoshima University, Kagoshima, Japan
| | - Takafumi Kawano
- Department of Pediatric Surgery, Research Field in Medicine and Health Sciences, Medical and Dental Sciences Area, Research and Education Assembly, Kagoshima University, Kagoshima, Japan
| | - Mitsuru Muto
- Department of Pediatric Surgery, Research Field in Medicine and Health Sciences, Medical and Dental Sciences Area, Research and Education Assembly, Kagoshima University, Kagoshima, Japan
| | - Satoshi Ieiri
- Department of Pediatric Surgery, Research Field in Medicine and Health Sciences, Medical and Dental Sciences Area, Research and Education Assembly, Kagoshima University, Kagoshima, Japan
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