8,871 results match your criteria: "Thalassemia Alpha"

Hematologic Parameters Cut-off Assessment of Adult Alpha-Thalassemia Patients in Iran.

Int J Hematol Oncol Stem Cell Res

October 2024

Thalassemia & Hemoglobinopathy Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.

Thalassemia is one of the most common blood disorders in Iran. Alpha-thalassemia is caused by the deletion of the alpha-globin gene. The frequency of deletions in the alpha-globin gene is associated with microcytosis and hypochromia, making hematological parameters valuable predictive tools in the initial identification of alpha-thalassemia patients.

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Hb Monza: A novel extensive HBB duplication with preserved α-β subunit interaction and unstable hemoglobin phenotype.

Med

December 2024

Department of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy; Hematology Department, Fondazione IRCCS San Gerardo dei Tintori, Monza, Italy.

Background: Unstable hemoglobins are caused by single amino acid substitutions in the HBB gene, often affecting key histidine residues, leading to protein destabilization and hemolytic crises. In contrast, long HBB variants, exceeding 20 bp, are rare and associated with a β-thalassemia phenotype due to disrupted α-β chain interactions. We describe a family wherein four of six members carry a novel 23-amino-acid in-frame duplication of HBB (c.

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Isocitrate dehydrogenase (IDH) mutant gliomas are classified as astrocytoma or oligodendroglioma based on the recent application of mutation, mutation, and 1p/19q co-deletion. Astrocytomas classically show and mutations, whereas oligodendrogliomas are defined by 1p/19q co-deletion. However, there are reports of gliomas that harbor both astrocytoma and oligodendroglioma morphologically and molecularly.

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Application of third-generation sequencing technology in the genetic testing of thalassemia.

Mol Cytogenet

December 2024

Prenatal Diagnostic Center, Medical Genetics Center, Department of Obstetrics and Gynaecology, The Seventh Affiliated Hospital of Sun Yat-sen University, 628 Zhenyuan Rd., Guangming Dist., Shenzhen, China.

Thalassemia is an autosomal recessive genetic disorder and a common form of Hemoglobinopathy. It is classified into α-thalassemia and β-thalassemia. This disease is mainly prevalent in tropical and subtropical regions, including southern China.

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In southern China, α-thalassemia is the most prevalent hereditary monogenic disorder, and deletion variants are the predominant form. Conventional thalassemia diagnosis techniques are numerous, however they are all limited in their ability to detect rare deletions. Here, we discuss a family who sought genetic counseling during their fourth pregnancy after experiencing Hb Bart's hydrops fetalis in two of their previous pregnancies.

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Accumulation of free α-globin is a critical factor in the pathogenesis of β-thalassemia. Autophagy plays a crucial role in clearing toxic free α-globin, thereby reducing disease severity. However, the impact of natural mutations in autophagy-related genes (ATGs) on the phenotypic variability of β-thalassemia remains unclear.

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Rationale: Mirror syndrome is a rare pregnancy condition in which maternal edema is associated with fetal hydrops. Because of its rarity and overlapping symptoms, this condition is often misdiagnosed as another pregnancy complication.

Patient Concerns: A 28-year-old pregnant Japanese woman presented with sudden 7.

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Objectives: This study aims to investigate the serotransferrin (TF), complement C1s subcomponent (C1S), immunoglobulin heavy constant gamma 4 (IGHG4), hemoglobin subunit alpha (HBA1), and clusterin (CLU) contents in β-thalassemia patients, and explores their physiological role as potential non-invasive bioindicators for disease diagnosis and iron overload.

Methods: A total of 62 children with β-thalassemia were recruited and categorized by genotype, along with 17 healthy pediatric volunteers for analysis. The circulating ferritin content was evaluated, and plasma levels of TF, C1S, IGHG4, HBA1, and CLU were assessed using ELISA.

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Objective: To explore the effect of the Mentzer Index (MI) in screening for children thalassemia (TT) minor.

Methods: We determined the MI cutoff value of diagnosing TT minor in children by utilizing a receiver operating characteristic (ROC) curve. Samples with MI values below this threshold, and no detectable gene mutations or IDA were further analyzed using Sanger sequencing or specific primer GAP-PCR.

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Based on the relationship between the intracellular concentration of sickle hemoglobin S (HbS) and the delay that occurs prior to the onset of sickling following deoxygenation, targeting the intracellular HbS concentration is a recognized therapeutic approach for sickle cell disease (SCD). We and others have shown that restricting iron by dietary or pharmacologic means improves hematologic parameters, inflammation, and organ damage in mouse models of SCD. Clinical evidence corroborating these findings is confined to case reports and small case series studies, none of which account for treatment or -thalassemia.

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Approximately 10-15% of human cancers are telomerase-negative and maintain their telomeres through a recombination-based process known as the alternative lengthening of telomeres (ALT) pathway. Loss of the alpha-thalassemia/mental retardation, X-linked (ATRX) chromatin remodeller is a common event in ALT-positive cancers, but is generally insufficient to drive ALT induction in isolation. We previously demonstrated that ATRX binds to the MRN complex, which is also known to be important in the ALT pathway, but the molecular basis of this interaction remained elusive.

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Abnormalities of teeth and jaws in thalassemia pediatric patients.

Spec Care Dentist

December 2024

Division of Orthodontics, Department of Preventive Dentistry, Faculty of Dentistry, Khon Kaen University, Khon Kaen, Thailand.

Aims: To assess the prevalence of abnormalities of teeth and jaws in thalassemia patients and their association with the severity and type of thalassemia.

Methods And Results: This cross-sectional study was conducted among thalassemia patients, attending the Pediatric Outpatient Clinic at a university hospital in Thailand. Data were collected from medical records, clinical and orthopantomographic examinations.

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Chronic hemolysis potentially elevates the risk of gallstones in several types of congenital red blood cell (RBC) disorders. However, the magnitude of the risk is unknown. We investigate the risk of gallstone disease in congenital RBC disorder patients, compared with general population comparators.

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Sickle cell disease in India: the journey and hope for the future.

Hematology Am Soc Hematol Educ Program

December 2024

Department of Paediatrics, Government Medical College, Nagpur, Maharashtra, India.

India, the most populous nation in the world, also has a high frequency of the sickle hemoglobin (HbS) allele globally. The Arab Indian HbS haplotype in India is characterized by a relatively high percentage of fetal Hb, with widely varying frequencies of α-thalassemia. Hence, sickle cell disease (SCD) in India was perceived to be mild.

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Background: The study aims to establish prediction model derived from red blood cell indices to improve the accuracy of α-thalassemia trait screening in non-anemic pregnant women.

Method: A diagnostic study as secondary analysis on the prospective database was conducted. The participants were pregnant women, undergoing α-thalassemia screening at first visit antenatal care using red blood cell indices with confirmation by PCR method.

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In this report, we describe a case of homozygous delta-beta (δβ) thalassaemia, a rare genetic disorder characterized by severe deficiency in delta (δ) and beta (β)-globin chain production, leading to ineffective erythropoiesis and chronic haemolytic anaemia. The patient, a 26-year-old female with δβ-thalassaemia, experienced a miscarriage. High-performance liquid chromatography revealed 89.

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Efficient and correction of hemoglobin Constant Spring mutation by prime editing in human hematopoietic cells.

Mol Ther Nucleic Acids

December 2024

Cyrus Tang Medical Institute, National Clinical Research Center for Hematologic Diseases, Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Protection, Soochow University, Suzhou, Jiangsu 215123, China.

Article Synopsis
  • - Hemoglobin Constant Spring (Hb CS) is a significant mutation linked to α-thalassemia caused by an anti-termination mutation in the α2-globin gene stop codon.
  • - A prime editing strategy was developed, demonstrating a successful introduction of Hb CS mutations in human cell lines (averaging 32% efficiency) and primary hematopoietic stem and progenitor cells (HSPCs) from healthy donors (averaging 27% efficiency).
  • - The prime editing process also corrected the Hb CS mutation to its normal form in HSPCs from patients with hemoglobin H Constant Spring, suggesting its potential as a therapeutic approach for treating this condition.
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Sickle Trait and Alpha Thalassemia Increase NOS-Dependent Vasodilation of Human Arteries Through Disruption of Endothelial Hemoglobin-eNOS Interactions.

Circulation

December 2024

Physiology Unit, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, Rockville, MD. (S.D.B., A.P.R., X.Z., M.A.H., L.A.R., R.L.S., M.J., J.N.d.R., A.J.M., J.M.J., R.O.E., N.T., K.L., H.C.A.).

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The 3.7 kb deletion is the most common known mutation in the α-globin gene cluster worldwide. The aim of this study is to investigate the most common types of 3.

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Background: Gilteritinib is a commonly used targeted drug for acute myeloid leukemia (AML), but the emergence of gilteritinib resistance greatly reduces the therapeutic effect. RING finger protein 38 (RNF38), a protein with RING Finger domain and E3 ubiquitin ligase activity, has been implicated in tumorigenesis and drug resistance. However, the role and mechanism of RNF38 in the gilteritinib resistance of AML remains unclear.

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Article Synopsis
  • The study explores the detection of a rare fusion gene associated with α-thalassemia, which can be mistakenly identified as normal or a different mutation using standard testing methods.
  • Over a sample period from January 2019 to January 2024, 32,083 samples were tested, revealing that 25 samples (0.08%) initially appeared suspicious for a common -α deletion but were ultimately found to be negative upon further testing.
  • The research concludes that while conventional methods can lead to misdiagnosis, flow-through hybridization is an effective way to screen for the fusion gene, which was identified in a small percentage of the Guangzhou population.
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Article Synopsis
  • * The most common genotype found was Southeast Asian deletion (--)/αα, while a rare genotype HKαα/-- was also identified; individuals with thalassemia had milder anemia symptoms compared to those with iron deficiency or overload.
  • * The research indicated significant differences in hematological parameters based on age and gender in patients, with older individuals and males generally showing higher hemoglobin and RBC levels than their counterparts.
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