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Egami N, Ishimura M, Ochiai M, Ichiyama M, Inoue H, Suenobu S, Nishikubo T, Nogami K, Ishiguro A, Hotta T, Uchiumi T, Kang D, Ohga S. The clinical and genetic landscape of early-onset thrombophilia in Japan. Pediatr Blood Cancer 2024; 71:e30824. [PMID: 38155150 DOI: 10.1002/pbc.30824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 11/11/2023] [Accepted: 12/06/2023] [Indexed: 12/30/2023]
Abstract
OBJECTIVES To determine the optimal management for early-onset thrombophilia (EOT), the genetic and clinical features of protein C (PC)-, protein S (PS)-, or antithrombin (AT)-deficient patients of ≤20 years of age were studied in Japan. METHODS/RESULTS Clinical and genetic information of all genetically diagnosed cases was collected through the prospective, retrospective study, and literature review. One-hundred-one patients had PC (n = 55), PS (n = 29), or AT deficiency (n = 18). One overlapping case had PC- and PS-monoallelic variant. Fifty-five PC-deficient patients (54%) had 26 monoallelic or 29 biallelic variant(s), and 29 (29%) PS-deficient patients had 20 monoallelic or nine biallelic variant(s). None of the patients had AT-biallelic variants. The frequent low-risk allele p.K193del (PC-Tottori) was found in five patients with monoallelic (19%) but not 29 with biallelic variant(s). The most common low-risk allele p.K196E (PS-Tokushima) was found in five with monoallelic (25%) and six with biallelic variant(s) (67%). One exceptional de novo PC variant was found in 32 families with EOT. Only five parents had a history of thromboembolism. Thrombosis concurrently developed in three mother-newborn pairs (two PC deficiency and one AT deficiency). The prospective cohort revealed the outcomes of 35 patients: three deaths with PC deficiency and 20 complication-free survivors. Neurological complications were more frequently found in patients with PC-biallelic variants than those with PC-, PS-, or AT-monoallelic variants (73% vs. 24%, p = .019). CONCLUSIONS We demonstrate the need for elective screening for EOT targeting PC deficiency in Japan. Early prenatal diagnosis of PC deficiency in mother-infant pairs may prevent perinatal thrombosis in them.
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Affiliation(s)
- Naoki Egami
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masataka Ishimura
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masayuki Ochiai
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Research Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masako Ichiyama
- Department of Pediatrics, National Hospital Organization Kokura Medical Center, Kitakyushu, Japan
| | - Hirosuke Inoue
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Souichi Suenobu
- Division of General Pediatrics and Emergency Medicine, Department of Pediatrics, Oita University Faculty of Medicine, Yufu, Japan
| | - Toshiya Nishikubo
- Division of Neonatal Intensive Care, Center of Maternal-Fetal Medicine, Nara Medical University, Kashihara, Japan
| | - Keiji Nogami
- Department of Pediatrics, Nara Medical University, Kashihara, Japan
| | - Akira Ishiguro
- Center for Postgraduate Education and Training, National Center for Child Health and Development, Setagaya-ku, Japan
| | - Taeko Hotta
- Department of Clinical Chemistry and Laboratory Medicine, Kyushu University Hospital, Fukuoka, Japan
| | - Takeshi Uchiumi
- Department of Clinical Chemistry and Laboratory Medicine, Kyushu University Hospital, Fukuoka, Japan
| | - Dongchon Kang
- Department of Clinical Chemistry and Laboratory Medicine, Kyushu University Hospital, Fukuoka, Japan
| | - Shouichi Ohga
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Hirose F, Sekinaka Y, Matsumoto S, Imai K, Ohga S, Nonoyama S, Kawaguchi H. Congenital heterozygous protein C deficiency with portal vein thrombosis. Pediatr Int 2023; 65:e15627. [PMID: 37705371 DOI: 10.1111/ped.15627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 06/12/2023] [Accepted: 07/10/2023] [Indexed: 09/15/2023]
Affiliation(s)
- Fumi Hirose
- Department of Pediatrics, National Defense Medical College, Saitama, Japan
| | - Yujin Sekinaka
- Department of Pediatrics, National Defense Medical College, Saitama, Japan
- Department of Pediatrics, Self Defense Forces Central Hospital, Tokyo, Japan
| | - Shinya Matsumoto
- Department of Clinical Chemistry and Laboratory Medicine, Kyushu University Hospital, Fukuoka, Japan
| | - Kohsuke Imai
- Department of Pediatrics, National Defense Medical College, Saitama, Japan
| | - Shouichi Ohga
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Shigeaki Nonoyama
- Department of Pediatrics, National Defense Medical College, Saitama, Japan
| | - Hiroyuki Kawaguchi
- Department of Pediatrics, National Defense Medical College, Saitama, Japan
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Villacis Calderon DG, Lone DW, Boucher AA, Osterholm EA. Term Infant with Bilateral Parenchymal Brain Hemorrhages. Neoreviews 2022; 23:e335-e338. [PMID: 35490187 DOI: 10.1542/neo.23-5-e335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
| | - Diana W Lone
- Pediatric Hematology-Oncology, University of Minnesota Masonic Children's Hospital, Minneapolis, MN
| | - Alexander A Boucher
- Pediatric Hematology-Oncology, University of Minnesota Masonic Children's Hospital, Minneapolis, MN
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Clinical Impact of Heritable Thrombophilia on Neonatal-Onset Thromboembolism: A Nationwide Study in Japan. J Pediatr 2021; 238:259-267.e2. [PMID: 34245770 DOI: 10.1016/j.jpeds.2021.07.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 06/25/2021] [Accepted: 07/01/2021] [Indexed: 01/05/2023]
Abstract
OBJECTIVE To clarify the incidence and genetic risk of neonatal-thromboembolism, we conducted a nationwide study exploring the impact of thrombophilia on neonatal-thromboembolism in Japan. STUDY DESIGN A questionnaire survey was conducted for perinatal centers in Japan, focusing on the clinical expression, genotype, treatment, and outcome of patients who developed thromboembolism within 28 days of birth from 2014 to 2018. RESULTS The estimated incidence of neonatal-thromboembolism was 0.39 cases per 10 000 live births. Intracranial lesions and purpura fulminans occurred in 66 and 5 of 77 patients, respectively. Fifty-eight (75.3%) infants presented within 3 days after birth. Four (5.2%) died, and 14 (18.2%) survived with disability. At the diagnosis, <20% plasma activity of protein C was noted in 16 infants, protein S (in 2), and antithrombin (in 1). Thirteen genetic tests identified 4 biallelic and 5 monoallelic protein C-variants but no protein S- or antithrombin-variants. Protein C-variants had purpura fulminans (P < .01), ocular bleeding (P < .01), positive-family history (P = .01), and death or disability (P = .03) more frequently than others. Protein C-variants were independently associated with disability (OR 5.74, 95% CI 1.16-28.4, P = .03) but not death. Four biallelic variants had serious thrombotic complications of neurologic disability, blindness, and/or amputation. Three monoallelic variants survived without complications. The only protein C-variant death was an extremely preterm heterozygote infant. CONCLUSIONS Monoallelic protein C-variants had a higher incidence of neonatal-thromboembolism than biallelic variants. Thrombophilia genetic testing should be performed in the setting of neonatal-thromboembolism and low protein C to identify the underlying genetic defect.
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Kobayashi T, Morishita E, Tsuda H, Neki R, Kojima T, Ohga S, Ochiai M, Adachi T, Miyata T. Clinical guidance for peripartum management of patients with hereditary thrombophilia. J Obstet Gynaecol Res 2021; 47:3008-3033. [PMID: 34169611 DOI: 10.1111/jog.14879] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/13/2021] [Accepted: 05/29/2021] [Indexed: 12/24/2022]
Abstract
Hereditary thrombophilia is a condition in which individuals are susceptible to the formation of thrombi due to a hereditary deficiency in anticoagulant factors, antithrombin (AT), protein C (PC), or protein S (PS). Many Japanese thrombophilia patients have PS deficiency, especially PS p.K196E (also called as PS Tokushima), which is exclusive to the Japanese population, and thrombosis sometimes occurs during pregnancy. At present, no management guidelines for pregnancy and delivery in thrombophilia patients have been developed. The Study Group for Hereditary Thrombophilia, one of the research groups of blood coagulation abnormalities in the Research Program on Rare and Intractable Diseases supported with the Research Grants of the Ministry of Health, Labour and Welfare Science, has therefore developed this clinical guidance to provide healthcare workers with necessary information on safe pregnancy, parturition and neonatal management, adopting a format of responses to seven clinical questions (CQ). At the end of each answer, the corresponding Recommendation Level (A, B, C) is indicated.
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Affiliation(s)
- Takao Kobayashi
- Department of Obstetrics and Gynecology, Hamamatsu Medical Center, Hamamatsu, Japan.,The Study Group for Hereditary Thrombophilia, Research on Blood Coagulation Abnormalities, Research Program on Rare and Intractable Diseases, The Ministry of Health, Labour and Welfare Science Research Grants, Tokyo, Japan
| | - Eriko Morishita
- The Study Group for Hereditary Thrombophilia, Research on Blood Coagulation Abnormalities, Research Program on Rare and Intractable Diseases, The Ministry of Health, Labour and Welfare Science Research Grants, Tokyo, Japan.,Department of Laboratory Sciences, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Hiroko Tsuda
- The Study Group for Hereditary Thrombophilia, Research on Blood Coagulation Abnormalities, Research Program on Rare and Intractable Diseases, The Ministry of Health, Labour and Welfare Science Research Grants, Tokyo, Japan.,Institute of Distribution Sciences, Nakamura Gakuen University, Fukuoka, Japan
| | - Reiko Neki
- The Study Group for Hereditary Thrombophilia, Research on Blood Coagulation Abnormalities, Research Program on Rare and Intractable Diseases, The Ministry of Health, Labour and Welfare Science Research Grants, Tokyo, Japan.,Division of Counseling for Medical Genetics, Department of Obstetrics and Gynecology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Tetsuhito Kojima
- The Study Group for Hereditary Thrombophilia, Research on Blood Coagulation Abnormalities, Research Program on Rare and Intractable Diseases, The Ministry of Health, Labour and Welfare Science Research Grants, Tokyo, Japan.,Medical Division, Aichi Health Promotion Foundation, Nagoya, Japan
| | - Shouichi Ohga
- The Study Group for Hereditary Thrombophilia, Research on Blood Coagulation Abnormalities, Research Program on Rare and Intractable Diseases, The Ministry of Health, Labour and Welfare Science Research Grants, Tokyo, Japan.,Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masayuki Ochiai
- The Study Group for Hereditary Thrombophilia, Research on Blood Coagulation Abnormalities, Research Program on Rare and Intractable Diseases, The Ministry of Health, Labour and Welfare Science Research Grants, Tokyo, Japan.,Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Tomoko Adachi
- Department of Obstetrics and Gynecology, Aiiku Maternal and Child Health Center, Aiiku Hospital, Tokyo, Japan
| | - Toshiyuki Miyata
- The Study Group for Hereditary Thrombophilia, Research on Blood Coagulation Abnormalities, Research Program on Rare and Intractable Diseases, The Ministry of Health, Labour and Welfare Science Research Grants, Tokyo, Japan.,Department of Cerebrovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Japan
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Rahman M, George C, Monagle P. Hot topics in coagulation testing: Important considerations for testing children for bleeding/thrombotic disorders. Int J Lab Hematol 2021; 42 Suppl 1:68-74. [PMID: 32543062 DOI: 10.1111/ijlh.13198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 03/01/2020] [Accepted: 03/17/2020] [Indexed: 11/27/2022]
Abstract
The accurate use and interpretation of diagnostic investigations are essential for safe and effective patient care. Appropriate application and interpretation of coagulation testing can be challenging, and many controversies exist relating to the standardization of testing procedures, the application of relevant tests to different patient populations and the interpretation of test results. We present a list of the most prominent controversies in coagulation testing and have selected three specific examples (age-appropriate reference ranges, therapeutic anticoagulation monitoring and tests of thrombin generation) for closer discussion, highlighting examples with a paediatric framework. We discuss the limitations of discrete age-partitioned reference intervals, given the established principle of developmental haemostasis; the difficulties in establishing normative data across different laboratories; important pre-analytical variables affecting coagulation testing; the challenges in interpreting APTT and anti-Xa assays for monitoring unfractionated heparin therapy in different clinical situations; and the limitations in interpreting tests of thrombin generation due to current available thrombin-specific substrates and the complicating factor of variable alpha2-macroglobulin levels. These controversies are demonstrated using paediatric examples, but raise important implications for coagulation testing in patients of all ages and highlight the pressing need for further research in these areas.
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Affiliation(s)
- Marzia Rahman
- Department of Clinical Haematology, Laboratory Services, Royal Children's Hospital, Parkville, Vic., Australia
| | - Carly George
- Department of Clinical Haematology, Laboratory Services, Royal Children's Hospital, Parkville, Vic., Australia
| | - Paul Monagle
- Department of Clinical Haematology, Laboratory Services, Royal Children's Hospital, Parkville, Vic., Australia
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Plasma phenotypes of protein S Lys196Glu and protein C Lys193del variants prevalent among young Japanese women. Blood Coagul Fibrinolysis 2020; 30:393-400. [PMID: 31490209 PMCID: PMC6887633 DOI: 10.1097/mbc.0000000000000854] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Protein S Tokushima (p.Lys196Glu) and two protein C gene variants (p.Arg189Trp, p.Lys193del) are hereditary thrombophilia in Japanese and Chinese populations, respectively; however, their diagnosis by plasma analyses is difficult because of the type II deficiency phenotype. Three gene variant genotypes were examined in young Japanese women (n = 231). Plasma total protein S activity and total protein S antigen levels were measured using a total protein S assay system, protein C and protein S activities by clot-based methods, and protein C and free protein S antigen levels by latex agglutination methods. protein S Tokushima (p.Lys196Glu) and protein C p.Lys193del variants were prevalent among participants with allele frequencies of 1.08 and 0.86%, respectively, whereas any carrier of protein C p.Arg189Trp variant was not identified. The plasma phenotype of the type II deficiency of protein S Tokushima heterozygotes was demonstrated by decreased total protein S activity with a normal total protein S antigen level; however, the protein C activities of protein C p.Lys193del heterozygotes were within reference intervals, whereas their protein C antigen levels were elevated. We compared the diagnostic accuracy of the total protein S activity/total protein S antigen ratio for identifying protein S Tokushima heterozygotes with that of the clot-based protein S activity/free protein S antigen ratio and found that sensitivity and specificity of 100% each was only achieved by the former. Protein S Tokushima and protein C p.Lys193del are prevalent among young Japanese women, and a plasma analysis using the total protein S assay system is more accurate than the clot-based protein S activity/free protein S antigen ratio for diagnosing protein S Tokushima carriers.
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Mizumoto H, Kimura M, Hata D. Colonic Perforation in a Term Newborn with Hereditary Protein C Deficiency. Indian Pediatr 2019. [DOI: 10.1007/s13312-019-1690-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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