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Kadi Ozan Z, Erduran E, Ceylaner S, Aslan Y, Bahadir A, Reis GP, Mutlu M. Familial Hemophagocytic Lymphohistiocytosis Screening in Neonatal Sepsis. J Pediatr Hematol Oncol 2024; 46:e393-e401. [PMID: 38968556 DOI: 10.1097/mph.0000000000002906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 05/15/2024] [Indexed: 07/07/2024]
Abstract
OBJECTIVE Neonatal sepsis and familial hemophagocytic lymphohistiocytosis (fHLH) have similar clinical and laboratory symptoms and the possibility of overlooking fHLH diagnosis is high in newborns with sepsis. History of consanguineous marriage and/or sibling death, hepatomegaly/splenomegaly, and hyperferritinemia (>500 ng/mL) are likely to support fHLH in newborns with sepsis. Therefore, in newborns with sepsis in whom at least 2 of these 3 criteria were detected, genetic variants was investigated for the definitive diagnosed of fHLH. According to the results of genetic examination, we investigated whether these criteria supporting fHLH could be used as a screening test in fHLH. MATERIALS AND METHODS fHLH-associated genetic variants were investigated in 22 patients diagnosed with neonatal sepsis who fulfilled at least 2 of the following criteria (1) history of consanguineous marriage and/or sibling death, (2) hepatomegaly/splenomegaly, and (3) hyperferritinemia (>500 ng/mL). RESULTS Heterozygous variants were determined in 6 patients (27.2%): 3 STXBP2 , 1 STX11 , 1 UNC13D , and 1 PRF1 . Polymorphisms associated with the clinical symptoms and signs of HLH were determined in 5 patients (22.7%): 4 UNC13D , 1 PRF1 . Two patients were in the heterozygous variants and polymorphism associated with the clinical symptoms and signs of HLH groups. In 12 patients, benign polymorphisms were detected in STXBP2 and UNC13D genes. No change in fHLH associated genes were found in 1 patient. CONCLUSION Some variants and/or polymorphisms identified in our patients have been previously reported in patients with HLH. Therefore, we recommend further investigation of fHLH in patients with neonatal sepsis who fulfill at least 2 of the above 3 criteria.
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Affiliation(s)
| | - Erol Erduran
- Department of Pediatrics, Division of Pediatric Hematology-Oncology, Faculty of Medicine, Karadeniz Technical University, Trabzon
| | - Serdar Ceylaner
- Intergen Genetics and Rare Diseases Diagnosis Center, Ankara
| | - Yakup Aslan
- Department of Pediatrics, Division of Neonatology, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey
| | - Aysenur Bahadir
- Department of Pediatrics, Division of Pediatric Hematology-Oncology, Faculty of Medicine, Karadeniz Technical University, Trabzon
| | - Gokce P Reis
- Department of Pediatrics, Division of Pediatric Hematology-Oncology, Faculty of Medicine, Karadeniz Technical University, Trabzon
| | - Mehmet Mutlu
- Department of Pediatrics, Division of Neonatology, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey
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Selvaratnam K, Nusair M, Mayurathan P. Overcoming Diagnostic Challenges: A Rare Presentation of Primary Hemophagocytic Lymphohistiocytosis (HLH) in a Young Female and the Importance of Timely Recognition. Cureus 2024; 16:e60242. [PMID: 38872699 PMCID: PMC11169998 DOI: 10.7759/cureus.60242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/13/2024] [Indexed: 06/15/2024] Open
Abstract
Hemophagocytic lymphohistiocytosis (HLH) is a severe life-threatening hematological disorder characterized by the dysregulation of the immune system and a hyperinflammatory response. Prompt treatment is crucial to prevent fatality. Although primarily affecting infants, HLH can also occur in children and adults. It is classified as primary and secondary, with primary HLH being genetic and predominantly affecting children. Secondary HLH is triggered by infections, malignancy, metabolic disorders, and rheumatological conditions. Diagnosis is based on the HLH-2004 criteria, considering clinical and laboratory parameters. Early diagnosis and treatment improve prognosis. Treatment follows the HLH-94 and HLH-2004 protocol and consists of eight weeks of induction therapy with cyclosporine, corticosteroids, and etoposide. This case describes a 26-year-old female diagnosed with HLH and successfully treated according to the protocol. The patient exhibited improvement and was discharged, demonstrating the importance of early diagnosis and appropriate management in adult HLH cases.
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Affiliation(s)
| | - Msm Nusair
- Internal Medicine Department, Teaching Hospital Batticaloa, Batticaloa, LKA
| | - Pakkiyaretnam Mayurathan
- University Medical Unit, Teaching Hospital Batticaloa, Batticaloa, LKA
- Clinical Sciences Department, Faculty of Health-Care Sciences, Eastern University Sri Lanka, Batticaloa, LKA
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Sztajnbok F, Fonseca AR, Campos LR, Lino K, Rodrigues MCF, Silva RM, de Almeida RG, Perazzio SF, Carvalho MDFF. Hemophagocytic lymphohistiocytosis and macrophage activation syndrome: two rare sides of the same devastating coin. Adv Rheumatol 2024; 64:28. [PMID: 38627860 DOI: 10.1186/s42358-024-00370-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 04/02/2024] [Indexed: 04/19/2024] Open
Abstract
Hemophagocytic lymphohistiocytosis (HLH) is a rare genetic hyperinflammatory syndrome that occurs early in life. Macrophage activation syndrome (MAS) usually refers to a secondary form of HLH associated with autoimmunity, although there are other causes of secondary HLH, such as infections and malignancy. In this article, we reviewed the concepts, epidemiology, clinical and laboratory features, diagnosis, differential diagnosis, prognosis, and treatment of HLH and MAS. We also reviewed the presence of MAS in the most common autoimmune diseases that affect children. Both are severe diseases that require prompt diagnosis and treatment to avoid morbidity and mortality.
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Affiliation(s)
- Flavio Sztajnbok
- Department of Pediatrics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
- Pediatric Rheumatology Division, Hospital Universitário Pedro Ernesto, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil.
- Rare Diseases Committee, Brazilian Society of Rheumatology (SBR), Rio de Janeiro, Brazil.
| | - Adriana Rodrigues Fonseca
- Department of Pediatrics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
- Instituto de Puericultura e Pediatria Martagão Gesteira, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Leonardo Rodrigues Campos
- Hospital Universitário Antônio Pedro, Universidade Federal Fluminense, Niterói, Brazil
- Pediatric Rheumatology Committee, Sociedade de Reumatologia do Rio de Janeiro 2022-2024, Rio de Janeiro, Brazil
| | - Kátia Lino
- Hospital Universitário Antônio Pedro, Universidade Federal Fluminense, Niterói, Brazil
| | - Marta Cristine Félix Rodrigues
- Pediatric Rheumatology Division, Instituto de Puericultura e Pediatria Martagão Gesteira, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Rodrigo Moulin Silva
- Hospital Universitário Pedro Ernesto, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Rozana Gasparello de Almeida
- Instituto de Puericultura e Pediatria Martagão Gesteira, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Sandro Félix Perazzio
- Rare Diseases Committee, Brazilian Society of Rheumatology (SBR), Rio de Janeiro, Brazil
- Division of Rheumatology, Universidade Federal de São Paulo (UNIFESP), Sao Paulo, Brazil
| | - Margarida de Fátima Fernandes Carvalho
- Rare Diseases Committee, Brazilian Society of Rheumatology (SBR), Rio de Janeiro, Brazil
- Division of Pediatric Rheumatology, Universidade Estadual de Londrina (UEL), Paraná, Brazil
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Zhang L, Dong C, Wu Q, Li Y, Feng L, Xing Y, Dong Y, Liu L, Li X, Huo R, Dong Y, Cheng E, Ge X, Xinrui T. Repeated pulmonary nodules as the primary symptom of familial hemophagocytic lymphohistiocytosis in adults: a case report and review. J Int Med Res 2023; 51:3000605231199019. [PMID: 37756585 PMCID: PMC10683577 DOI: 10.1177/03000605231199019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 08/11/2023] [Indexed: 09/29/2023] Open
Abstract
Pulmonary nodules are usually considered to be associated with malignant tumors and benign lesions, such as granuloma, pulmonary lymph nodes, fibrosis, and inflammatory lesions. Clinical cases of pulmonary nodules associated with hemophagocytic lymphohistiocytosis have rarely been reported. Therefore, when patients develop pulmonary nodules, the possibility of developing hemophagocytic lymphohistiocytosis is often not considered. We report the first case of familial hemophagocytic lymphohistiocytosis with recurrent pulmonary nodules as the first symptom. Our findings will hopefully provide new ideas for the diagnosis and treatment of pulmonary nodules in the future.
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Affiliation(s)
- Lulu Zhang
- The Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Chuanchuan Dong
- The Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Qiannan Wu
- The Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Yupeng Li
- The Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Liting Feng
- The Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Yanqing Xing
- The Second Hospital of Shanxi Medical University, Taiyuan, China
| | | | - Le Liu
- The Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Xiaohui Li
- The Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Rujie Huo
- The Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Yanting Dong
- The Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Erjing Cheng
- The Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Xiaoyan Ge
- The Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Tian Xinrui
- The Second Hospital of Shanxi Medical University, Taiyuan, China
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Yu MZ, Wu L, Zhang J, Wang JS, Wang YN, Wang Z. [Clinical characteristics of primary hemophagocytic lymphohistiocytosis associated with perforin gene deficiency: a single-center retrospective study]. ZHONGHUA XUE YE XUE ZA ZHI = ZHONGHUA XUEYEXUE ZAZHI 2023; 44:572-577. [PMID: 37749038 PMCID: PMC10509624 DOI: 10.3760/cma.j.issn.0253-2727.2023.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Indexed: 09/27/2023]
Abstract
Objective: This study aimed to investigate the clinical characteristics of patients diagnosed with primary hemophagocytic lymphohistiocytosis (pHLH) associated with perforin gene deficiency. Methods: We retrospectively analyzed the clinical data of 16 pHLH patients associated with perforin gene deficiency at Beijing Friendship Hospital, Capital Medical University, from April 2014 to August 2021. The mutation sites, mutation types, family history, clinical characteristics, and prognosis of the patients were assessed. Results: A total of 16 patients, including ten males and six females, with a median onset age of 17.5 years (range: 4-42 years), were enrolled in this study. Sixteen different mutations were identified, consisting of 11 missense mutations, one nonsense mutation, two frameshift mutations, and two in-frame mutations. All patients harbored at least one deleterious missense mutation, with the most common mutation sites being c.1349C>T (p.T450M) and c.503G>A (p.S168N). Decreased natural killer (NK) cell activity was observed in 11 patients, reduced perforin protein expression in ten patients, concurrent Epstein-Barr virus (EBV) infection at onset in eight patients, a family history in two patients, and central nervous system involvement in four patients. Eleven cases underwent allogeneic hematopoietic stem cell transplantation (allo-HSCT), with eight cases surviving. The median survival time of non-transplanted patients was eight months (range: 4-18 months), while that of transplanted patients was reported as "not reached". Conclusions: Emphasizing the diagnosis of pHLH in adults with perforin gene deficiency. In addition, it should be noted that EBV infection can potentially act as a triggering factor in such disease, and allo-HSCT exerts a substantial effect on the prognosis of patients.
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Affiliation(s)
- M Z Yu
- Department of Hematology, Benjing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - L Wu
- Department of Hematology, Benjing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - J Zhang
- Department of Hematology, Benjing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - J S Wang
- Department of Hematology, Benjing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Y N Wang
- Department of Hematology, Benjing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Z Wang
- Department of Hematology, Benjing Friendship Hospital, Capital Medical University, Beijing 100050, China
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You Y, Wu W, Li B. Familial hemophagocytic phohistiocytosis induced by PRF1 mutation with neurologic manifestations as the initial clinical presentations: A case report. Medicine (Baltimore) 2023; 102:e34198. [PMID: 37390248 PMCID: PMC10313311 DOI: 10.1097/md.0000000000034198] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 06/14/2023] [Indexed: 07/02/2023] Open
Abstract
BACKGROUND To investigate the clinical characteristics of familial hemophagocytic phohistiocytosis (FHL) induced by PRF1 gene mutation and with central nervous injury as the initial presentation. CASE PRESENTATION Herein, we presented 2 cases of a familial hemophagocytic syndrome caused by PRF1 gene mutation in 1 family with central nervous injury as the first symptom and searched relevant literature for clinical analysis of its pathogenic characteristics. Two children from 1 family were included in this study, both of whom had complex heterozygous mutations of C. 1189_1190dupTG (p.H398Afs*23) and C. 394G>A (p.G132R). Literature search further revealed 20 cases of PRF1 gene mutation-induced familial FHL with central nervous injury as the initial presentation. The main neurological symptoms included cranial nerve injury (81.8%), convulsion (77.3%), ataxia (63.6%), encephalopathy (59.1%), and limb paralysis (40.9%). Cranial imaging findings were dominated by the cerebral hemisphere (100%), cerebellar hemisphere (85%), brainstem (55%), and periventricular white matter (40%), and 73.7% of cases had elevated white blood cell count in CSF. Most cases were confirmed by differential diagnosis and gene sequencing, which suggested that C. 673C>T (P.r225W), C. 394G>A (P.G132r), C. 666C>A (p.H222Q), C. 1349C>T (p.T450M), C. 1349C>T (p.T450M), and C. 443C>C (p.A148G) could be focal mutations of this disease. CONCLUSION Lesions involving the cerebellum and brainstem in children with ataxia and cranial nerve damage could be indicative of primary FHL; thus, the inherent immune test and gene test should be timely performed to help confirm the diagnosis, guide the treatment, and improve the prognosis.
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Affiliation(s)
- Yang You
- Department of Imaging, The Fourth Hospital of Hebei Medical University, Shijiazhuang, China
| | - Wenjuan Wu
- Department of Neurology, Hebei Children’s Hospital, Hebei Children’s Hospital Affiliated to Hebei Medical University, Shijiazhuang, China
| | - Baoguang Li
- Department of Neurology, Hebei Children’s Hospital, Hebei Children’s Hospital Affiliated to Hebei Medical University, Shijiazhuang, China
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Ręka G, Stefaniak M, Lejman M. Novel Molecular Therapies and Genetic Landscape in Selected Rare Diseases with Hematologic Manifestations: A Review of the Literature. Cells 2023; 12:cells12030449. [PMID: 36766791 PMCID: PMC9913931 DOI: 10.3390/cells12030449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/25/2023] [Accepted: 01/26/2023] [Indexed: 02/03/2023] Open
Abstract
Rare diseases affect less than 1 in 2000 people and are characterized by a serious, chronic, and progressive course. Among the described diseases, a mutation in a single gene caused mastocytosis, thrombotic thrombocytopenic purpura, Gaucher disease, and paroxysmal nocturnal hemoglobinuria (KIT, ADAMTS13, GBA1, and PIG-A genes, respectively). In Castleman disease, improper ETS1, PTPN6, TGFBR2, DNMT3A, and PDGFRB genes cause the appearance of symptoms. In histiocytosis, several mutation variants are described: BRAF, MAP2K1, MAP3K1, ARAF, ERBB3, NRAS, KRAS, PICK1, PIK3R2, and PIK3CA. Genes like HPLH1, PRF1, UNC13D, STX11, STXBP2, SH2D1A, BIRC4, ITK, CD27, MAGT1, LYST, AP3B1, and RAB27A are possible reasons for hemophagocytic lymphohistiocytosis. Among novel molecular medicines, tyrosine kinase inhibitors, mTOR inhibitors, BRAF inhibitors, interleukin 1 or 6 receptor antagonists, monoclonal antibodies, and JAK inhibitors are examples of drugs expanding therapeutic possibilities. An explanation of the molecular basis of rare diseases might lead to a better understanding of the pathogenesis and prognosis of the disease and may allow for the development of new molecularly targeted therapies.
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Affiliation(s)
- Gabriela Ręka
- Independent Laboratory of Genetic Diagnostics, Medical University of Lublin, A. Gębali 6, 20-093 Lublin, Poland
- Correspondence:
| | - Martyna Stefaniak
- Student Scientific Society of Independent Laboratory of Genetic Diagnostics, Medical University of Lublin, A. Gębali 6, 20-093 Lublin, Poland
| | - Monika Lejman
- Independent Laboratory of Genetic Diagnostics, Medical University of Lublin, A. Gębali 6, 20-093 Lublin, Poland
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Caldirola MS, Raccio AG, Giovanni DD, Gaillard MI, Preciado MV. Pediatric inborn errors of immunity causing hemophagocytic lymphohistiocytosis: Case report and review of the literature. J Leukoc Biol 2022; 112:607-615. [PMID: 35899932 DOI: 10.1002/jlb.5mr0622-037r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 06/28/2022] [Indexed: 11/07/2022] Open
Abstract
Inborn errors of immunity are a group of genetic disorders caused by mutations that affect the development and/or function of several compartments of the immune system, predisposing patients to infections, autoimmunity, allergy and malignancies. In this regard, mutations that affect proteins involved in trafficking, priming, docking, or membrane fusion will impair the exocytosis of lytic granules of effector NK and cytotoxic T lymphocytes. This may predispose patients to hemophagocytic lymphohistiocytosis, a life-threatening immune disorder characterized by systemic lymphocyte and macrophage activation, and increased levels of cytokines, which lead to an uncontrolled hyperinflammation state and progressive multiorgan damage. In this review, we will describe a clinical case and recent advances in inborn errors of immunity predisposing to hemophagocytic lymphohistiocytosis. Summary sentence: Review of recent advances in inborn errors of immunity predisposing to hemophagocytic lymphohistiocytosis.
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Affiliation(s)
- María Soledad Caldirola
- Servicio Inmunología, Instituto Multidisciplinario de Investigaciones en Patologías Pediátricas (IMIPP- CONICET-GCBA)- Hospital de Niños "Dr. Ricardo Gutiérrez,", Buenos Aires, Argentina
| | - Andrea Gómez Raccio
- Servicio de Inmunología, Hospital de Niños "Dr. Ricardo Gutiérrez,", Buenos Aires, Argentina
| | - Daniela Di Giovanni
- Servicio de Inmunología, Hospital de Niños "Dr. Ricardo Gutiérrez,", Buenos Aires, Argentina
| | - María Isabel Gaillard
- Servicio Inmunología, Instituto Multidisciplinario de Investigaciones en Patologías Pediátricas (IMIPP- CONICET-GCBA)- Hospital de Niños "Dr. Ricardo Gutiérrez,", Buenos Aires, Argentina.,Sección Citometría - Laboratorio Stamboulian, Buenos Aires, Argentina
| | - María Victoria Preciado
- Laboratorio de Biología Molecular, División Patología, Instituto Multidisciplinario de Investigaciones en Patologías Pediátricas (IMIPP), CONICET-GCBA, Hospital de Niños "Dr. Ricardo Gutiérrez,", Buenos Aires, Argentina
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Roy S, Rai N, Misra S, Prajapati S, Yadav G. Hemophagocytic lymphohistiocytosis after ChAdOx1 nCoV-19 coronavirus vaccination in a patient with no known comorbidities. INDIAN JOURNAL OF MEDICAL SPECIALITIES 2022. [DOI: 10.4103/injms.injms_80_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Shi Y, Qiao Z, Bi X, Zhang C, Fu J, Jia Y, Yang G. RF1 Gene Mutation in Familial Hemophagocytic Lymphohistiocytosis 2: A Family Report and Literature Review. Pharmgenomics Pers Med 2021; 14:1637-1645. [PMID: 34938098 PMCID: PMC8687883 DOI: 10.2147/pgpm.s326921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Accepted: 11/24/2021] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE Gene mutation analysis was performed on a family with familial hemophagocytic lymphohistiocytosis (FHL) so as to provide an accurate etiological diagnosis, leading to genetic counseling for the family members. METHODS The clinical data of two probands (siblings) with FHL in one family were analyzed, and eight genes related to the onset of the primary hemophagocytic lymphohistiocytosis (pHLH) (PRF1, UNC13D, STX11, STXBP2, SH2D1A, BIRC4/XIAP, Rab27a, LYST) were detected and analyzed in the probands and their parents with whole exome sequencing. RESULTS Proband 1 was a two-year-old male with the clinical manifestations of fever, hepatosplenomegaly, and a decreased peripheral blood cell count, sCD25: 12504pg/mL. The results of genetic testing showed that there was a c.1349C>T heterozygous missense mutation and a c.853_855del heterozygous mutation in the PRF1 in proband 1. Proband 2 was an eight-year-old female with the clinical manifestations of convulsions and disturbance of consciousness with fever. The genetic test results were the same as those of proband 1. There was a single heterozygous mutation in the parents of the probands, and both probands had compound heterozygous mutations. CONCLUSION According to the clinical manifestations, laboratory tests, and results of the family molecular genetic testing, the probands could be clinically diagnosed as FHL2. The results of gene sequencing revealed that this was an autosomal recessive family with familial hemophagocytic syndrome. A rare pathogenic mutation (c.853_855del) in the PRF1 was discovered in the two patients with HLH.
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Affiliation(s)
- Yuan Shi
- Department of Pediatric, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, 010000, People’s Republic of China
| | - Zhidong Qiao
- Department of Pediatric, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, 010000, People’s Republic of China
| | - Xiaoduo Bi
- Department of Pediatric, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, 010000, People’s Republic of China
| | - Chenxin Zhang
- Department of Pediatric, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, 010000, People’s Republic of China
| | - Junxian Fu
- Department of Pediatric, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, 010000, People’s Republic of China
| | - Yuexin Jia
- Department of Pediatric, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, 010000, People’s Republic of China
| | - Guanglu Yang
- Department of Pediatric, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, 010000, People’s Republic of China
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