نتایج جستجو برای: globin mutation

تعداد نتایج: 297002  

2018
Atefeh Valaei Morteza Karimipoor Alireza Kordafshari Sirous Zeinali

Alpha-thalassemia (α-thal) is probably the most prevalent monogenic condition in the world. Deletions are the most common types of mutations in α-thal, followed by point mutations and small insertion/deletion. In the context of national screening program for prevention of thalassemia and hemoglobinopathies in Iran, α-thal carriers have come to more attention. Therefore, the frequency and distri...

Journal: :Journal of pediatric hematology/oncology 2013
Celeste Bento Tabita Magalhães Maia Ines Carvalhais Filipa Moita Gabriela Abreu Luis Relvas Alexandra Pereira José Farela Neves Maria L Ribeiro

Neonatal cyanosis in healthy newborns can be associated either with methemoglobin due to cytochrome b5 reductase deficiency or to M-hemoglobin, a group of hemoglobin variants resulting from mutations in the globin chain genes. We report the clinical case of a neonate with cyanosis and normal cardiac and respiratory function. At birth the hematological parameters were normal; however, the methem...

Journal: :Blood 1998
J Lewis B Yang R Kim H Sierakowska R Kole O Smithies N Maeda

The betaIVS-2-654 C-->T mutation accounts for approximately 20% of beta thalassemia mutations in southern China; it causes aberrant RNA splicing and leads to beta0 thalassemia. To provide an animal model for testing therapies for correcting splicing defects, we have used the "plug and socket" method of gene targeting in murine embryonic stem cells to replace the two (cis) murine adult beta glob...

Journal: :Blood 2000
K P Anderson S C Crable J B Lingrel

The erythroid Krüppel-like factor (EKLF) is a key regulatory protein in globin gene expression. This zinc finger transcription factor is required for expression of the adult beta globin gene, and it has been suggested that it plays an important role in the developmental switch from fetal gamma to adult beta globin gene expression. We have previously described a sequence element in the distal pr...

Journal: :Wellcome Open Research 2022

Background: β-thalassemia is rare in sub-Saharan Africa and to our knowledge there has been no case of homozygous major reported from this region. In a recent cohort study, we identified four mutations among 83 heterozygous carriers Kilifi, Kenya. One the was β-globin gene initiation codon mutation (ATG➝ACG) (rs33941849). Here present patient with resulting mutation,...

2011
Mami Nakamura Ayako Miyazaki Takayuki Takubo Yoko Matsuzawa Jun Saito Masao Omura Tetsuo Nishikawa

Hemoglobin A1c (HbA1c) is an important parameter for evaluating long-term (6-8 weeks) control of blood glucose levels in patients with diabetes mellitus. We report a Japanese diabetic case who harbored abnormal Hb and demonstrated falsely low HbA1c levels in the regular ion exchange HPLC-based assay. His abnormal β-globin chain had an amino acid replacement that corresponded to glycine to serin...

Journal: :Haematologica 2012
Dragana Milojkovic Amr Ibrahim Alistair Reid Letizia Foroni Jane Apperley David Marin

Using the value of 30 mg/L for serum ferritin as cut off, 861 samples showed iron deficiency (ID) (group A) and 271 were without ID (group B) (Figure 1). The mean HbA2 value was 2.8%±0.79 in group A and 3.50%±1.23 in group B, with a significant difference (P=0.00001) among between the two groups. The distribution of the 253 samples with molecular analysis between groups A and B showed that 170 ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1975
B G Forget C A Marotta S M Weissman M Cohen-Solal

In normal messenger RNA for the human beta-globin chain, nucleotide sequences have been identified which can be matched to the amino-acid sequence of the abnormally long segment of the beta-chain of hemoglobin Cranston. The finding of these sequences strengthens the hypothesis that the betaCranston chain arose by a frameshift mutation allowing the "readthrough" of the normal termination codon a...

Journal: :Blood 1993
S Murru M C Pischedda A Cao M C Rosatelli M Pirastu G V Sciarratta L Manca D Gallisai C Toffoli

Journal: :International Journal of Nanomedicine 2006
Viroj Wiwanitkit

Hemoglobin variants in which a frameshift results in chain elongation are unusual. Hemoglobin Pakse (Hb Pakse) is an unstable hemoglobin with abnormal elongation, first described in Indochina. An alpha2-globin gene termination codon mutation, TAA -->TAT or Term -->Tyr, has been described in the pathogenesis of Hb Pakse. This abnormality causes a frameshift that elongates the alpha chain amino a...

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