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1.
BMC Med Genet ; 20(1): 136, 2019 08 09.
Artigo em Inglês | MEDLINE | ID: mdl-31399060

RESUMO

BACKGROUND: Thalassemia is the most common inherited disease in the world, involving α- or ß-globin in red blood cells. Thalassemia cases rank fifth in the list of national catastrophic diseases in Indonesia; however, nationwide screening for thalassemia carriers is not yet mandatory. This study aimed to assess whether blood count metrics, such as the Shine & Lal index (SLI; MCV*MCV*MCH/100), might serve as a predictor to screen thalassemia carriers in a limited resource area where molecular methods are not readily available. METHODS: During a family gathering of thalassemia patients, family members (n196) underwent a complete blood count test. Those with MCV < 80 fL and/or MCH < 27 pg and/or SLI < 1530 were further examined for Hb analysis. Only samples with HbA2 fraction > 4% or with a peak in the HbE fraction were sequenced to confirm ß-globin gene mutations. RESULTS: Of 196 family members, 117 (59.6%) had low MCV and/or low MCH and/or low SLI. The HbE fraction (mean 24.06% ± 0.95, range 22.4-26.5) was found in 27 (13.7%) cases, and all had a mutation at codon (CD)26 (c.79G > A). The mean HbA2 fraction in these samples was 3.18% ± 0.62 (range 2.6-3.8). For samples with HbA2 > 4% (n30; 15.3%), all had mutations at IVS1nt5 (c.92 + 5 G > C; n28), CD8/9 (c.27_28insG; n1) and CD19 (c.59A > G; n1). The mean HbA2 fraction with a mutation at IVS1nt5 (c.92 + 5 G > C) was 4.65% ± 0.77 (range 4.0-5.6). Interestingly, anaemia was only present in 25 and 57% of ß-thalassemia carriers with mutations at CD26 (c.79G > A) and at IVS1nt5 (c.92 + 5 G > C), respectively. CONCLUSIONS: The Shine & Lal index is helpful in the early screening of ß-thalassemia carriers, since this index confirms mutations at CD-26 (c.79G > A) and at IVS1nt5 (c.92 + 5 G > C), which are both common mutations in Bandung, Indonesia. Further DNA analysis is a topic of interest to map variants in globin genes and their distribution across populations.


Assuntos
Diagnóstico Precoce , Estudos de Associação Genética , Predisposição Genética para Doença/genética , Globinas beta/genética , Talassemia beta/genética , Adolescente , Sequência de Bases , Eritrócitos , Feminino , Hemoglobinas/genética , Humanos , Indonésia , Masculino , Deleção de Sequência
2.
Cell Mol Biol (Noisy-le-grand) ; 64(5): 97-101, 2018 Apr 30.
Artigo em Inglês | MEDLINE | ID: mdl-29729700

RESUMO

Lifetime blood transfusion experienced by major ß-thalassemia patients complicated with iron overload, therefore, may lead to their tissue injury. Ultimately, free toxic iron may alter immune response via dysregulation of immune cell activity producing prolonged effector reaction. Neutrophil as one of the vital innate immune cell despite serves as the first line of defense resulting acute inflammation has a pivotal role in chronic inflammation while releasing the toxic substance that interferes biological processes. This process is initiated by one of them by activation of Fcγ Receptor III (CD16), a neutrophil membrane-bound protein. A cross-sectional laboratory study involving lysed-erythrocyte heparinized whole blood of fifty pediatric major ß-thalassemia patients treated with monoclonal antibodies i.e. CD16, CD14, and HLA-DR, dissected into CD16+ and CD16++ population using flow cytometry. Expression of Fcγ Receptor III was measured as Median Fluorescent Intensity (MFI). Hematology and iron status were measured. A correlation analysis was done. MFI of CD16 neutrophil [509.5 (371 - 796.5)] and ferritin level [(3209 µg/L, 1862 - 4564)] was positively correlated (r = 0.4, P = 0.007). Respectively, ferritin and serum iron were found negatively correlated with segmented neutrophils (r = -0.3, P = 0.02; r = -0.3, P = 0.02). Change in CD16 expression may implicate preliminarily neutrophil activation as a response of iron-overloaded tissue and result in chronic inflammation in ß-thalassemia patients. However, the maturity of this cell may be altered.  Future study in the understanding of neutrophil-mediated inflammation, particularly related to immune complexes and functionality, is imperative to be explored.


Assuntos
Ferritinas/genética , Sobrecarga de Ferro/genética , Ferro/metabolismo , Neutrófilos/metabolismo , Receptores de IgG/genética , Talassemia beta/genética , Criança , Pré-Escolar , Estudos Transversais , Transfusão de Eritrócitos/efeitos adversos , Feminino , Ferritinas/sangue , Proteínas Ligadas por GPI/genética , Proteínas Ligadas por GPI/metabolismo , Regulação da Expressão Gênica , Humanos , Sobrecarga de Ferro/sangue , Sobrecarga de Ferro/etiologia , Sobrecarga de Ferro/patologia , Masculino , Neutrófilos/patologia , Receptores de IgG/metabolismo , Talassemia beta/sangue , Talassemia beta/patologia
3.
Cell Mol Biol (Noisy-le-grand) ; 63(12): 22-24, 2017 Dec 30.
Artigo em Inglês | MEDLINE | ID: mdl-29307336

RESUMO

Thalassemia is the most common hereditary haemolytic anemia in Southeast Asia, in which Indonesia is among countries that are at a high risk for thalassemia. It has been reported that mutation in the beta-globin gene is responsible in severe Thalassemia. However, the spectrum of beta-globin gene mutations in Indonesian population varies in different regions . Thus, this study aimed to identify the most prevalent mutation of Thalassemia patients from the Hasan Sadikin Hospital, Bandung, using this as a reference hospital for Thalassemia in West Java. The three most prevalent mutations of beta globin (IVS1nt5, Cd26 (HbE), and IVS1nt1), were conducted in the beginning of this study. Mutations of 291 samples were detected by PCR-RFLP in the Molecular Genetic Laboratory, Faculty of Medicine Universitas Padjadjaran, Bandung. The prevalence of the beta globin gene mutation types were 47.4% IVS1nt5 homozygote, 9.9% compound heterozygote IVS1nt5/HbE, 5.4% compound heterozygote IVS1nt5/IVS1nt1, 1.4% compound heterozygote HbE/IVS1nt1, 1% HbE homozygote, 14.4% Compound heterzygote IVS1nt5/… (no paired mutation), 2.06% compound heterozygote HbE/… (no paired mutation), 1.3% compound heterozygote IVS1nt1/… (no paired mutation), and 7 samples were unidentified. The thalassemia mutation IVS1nt5 homozygote is the most common mutation found in Thalassemia patients at Hasan Sadikin Hospital, Bandung. The samples with unidentified results might carry mutations other than the three that are observed in the present study.


Assuntos
Mutação , Talassemia/genética , Globinas beta/genética , Homozigoto , Hospitais , Humanos , Indonésia
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