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Samha L, Sirdah MM, Reading NS, Karmi B, Agarwal AM. Molecular Understanding of Severe Cases of β-Thalassemia in the Nablus Region, West Bank, Palestine. Hemoglobin 2020; 44:128-130. [PMID: 32420772 DOI: 10.1080/03630269.2020.1763398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Hemoglobinopathies are common inherited monogenic diseases that are likely to remain a serious regional health problem where thalassemias and sickle cell disease are prevalent. In regions where recessive alleles for hemoglobinopathy disorders are present with high consanguinity rates, such as in Palestine, coinheritance of two different genetic defects becomes anticipated and prevalent. In this report, we characterize the molecular variants of the HBB gene for 16 patients with transfusion-dependent anemia registered at the Thalassemia Patient Friends Society in Nablus governorate, West Bank, Palestine. Analysis revealed that 63.0% (10/16) of the patients were homozygous for β-thalassemia (β-thal), IVS-I-6 (T>C) (HBB: c.92+6T>C) or IVS-I-110 (G>A) (HBB: c.93-21G>A); 19.0% (3/16) homozygous for sickle cell disease or Hb S (HBB: c.20A>T, p.Glu6Val); 13.0% (2/16) were double heterozygotes for Hb S/β-thal, (HBB: c.20A>T/HBB: c.92G>C) and HBB: c.20A>T/HBB: c.321_322insG; and one case was a compound heterozygote for β-thal, codon 39 (C>T) (HBB: c.118C>T) and IVS-I-110. The most common mutation reported in the 16 patients was IVS-I-6 (0.38), followed by IVS-I-110 (0.28) Hb S (0.25) and 0.03 each for codon 39, codons 106/107 (HBB: c.321_322insG) and Hb Monroe (HBB: c.92G>C). In conclusion, in Palestine, a variety of intricate inheritance patterns are encountered in clinical practice.
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Affiliation(s)
- Leen Samha
- University of Utah School of Medicine, Salt Lake City, UT, USA.,Institute for Clinical and Experimental Pathology, ARUP Laboratories, Salt Lake City, UT, USA
| | - Mahmoud M Sirdah
- Department of Internal Medicine, University of Utah, Salt Lake City, UT, USA.,Biology Department, Al Azhar University-Gaza, Gaza, Palestine
| | - N Scott Reading
- Institute for Clinical and Experimental Pathology, ARUP Laboratories, Salt Lake City, UT, USA.,Department of Internal Medicine, University of Utah, Salt Lake City, UT, USA.,Department of Pathology, University of Utah, Salt Lake City, UT, USA
| | - Bashar Karmi
- The Thalassemia Patients' Friends Society/MediCare Pathology Laboratories, West Bank, Ramallah, Palestine
| | - Archana M Agarwal
- Institute for Clinical and Experimental Pathology, ARUP Laboratories, Salt Lake City, UT, USA.,Department of Pathology, University of Utah, Salt Lake City, UT, USA
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Ghoti H, Fibach E, Rachmilewitz EA, Jeadi H, Filon D. New Insights on β-Thalassemia in the Palestinian Population of Gaza: High Frequency and Milder Phenotype Among Homozygous IVS-I-1 (HBB: c.92+1G>A) Patients with High Levels of Hb F. Hemoglobin 2017; 41:144-146. [PMID: 28670942 DOI: 10.1080/03630269.2017.1339611] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
β-Thalassemia (β-thal) is a very common disease in the Palestinian population of the Gaza Strip. We studied their mutation frequency and clinical features. Thirteen different mutations were identified. The most common mutation was IVS-I-1 (G>A) (HBB: c.92+1G>A), which was prevalent in 31.5% of the thalassemia alleles studied. The IVS-I-110 (G>A) (HBB: c.93-21G>A) mutation was found in 25.0% of the alleles. Homozygotes for the IVS-I-1 mutation had higher mean hemoglobin (Hb) levels, required less blood transfusions, and lower transferrin saturation than the homozygotes for the IVS-I-110 mutation. This milder phenotype was, most likely, the result of the persistent production of Hb F; it was 9-fold higher in absolute terms (g/dL) and 7.7-fold higher in relative terms (percentage of total Hb). About half of our IVS-I-1 patients carried the XmnI polymorphism, which is known to be associated with elevated Hb F levels.
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Affiliation(s)
- Hussam Ghoti
- a Department of Hematology , Augusta Victoria Hospital , Jerusalem , Israel
| | - Eitan Fibach
- a Department of Hematology , Augusta Victoria Hospital , Jerusalem , Israel.,b Department of Hematology , Hadassah, Hebrew University Medical Center , Jerusalem , Israel
| | | | - Hisham Jeadi
- d Department of Hematology , European Hospital of Gaza , Gaza , Palestinian Territory
| | - Dvora Filon
- b Department of Hematology , Hadassah, Hebrew University Medical Center , Jerusalem , Israel
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Sirdah MM. Superparamagnetic-bead Based Method: An Effective DNA Extraction from Dried Blood Spots (DBS) for Diagnostic PCR. J Clin Diagn Res 2014; 8:FC01-4. [PMID: 24959449 DOI: 10.7860/jcdr/2014/8171.4226] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 03/27/2014] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Storing blood as dried spots on filter paper is a trustworthy approach used in genetic screening issues which justifies the necessity for a reliable DNA extraction method. The present work aims to investigate the effectiveness of superparamagnetic-bead based method in extracting DNA from dried blood spots (DBS). MATERIALS AND METHODS Sixteen venous blood samples collected in K3-EDTA tubes (400μl of whole blood) were used for the spotting (4 circles each 100μl) on Ahlstrom 226 grad filter papers, for extraction and comparison. To ensure effectiveness, the extracted DNA was checked for quantity using the Quant-iT™ dsDNA Broad-Range Assay Kit and for quality by polymerase chain reaction (PCR) amplification of 344 bp segment of the HBB gene. Hybridization assays based on the dynamic allele specific hybridization (DASH) technique for two hemoglobin beta (HBB) mutations in genomic DNA extracted from DBS of ß-thalassemia patients were also performed to ensure the quality of extraction. RESULTS The results revealed a compatible effectiveness of the superparamagnetic-bead based method in extracting DNA from DBS particularly when incubating the DBS with lysis buffers BL+BLM overnight. A mean concentration of 21ng/ μl was obtained with lysis buffers BL+BLM overnight incubation compared to 5.2 ng/μl for 2 h incubation with lysis buffers BL+BLM and 4.7 ng/μl when extraction performed using the lysis buffer BLM alone. Moreover, PCR amplification of 344 bp segment of the HBB showed a good quality of the extracted DNA. CONCLUSION It was concluded that the superparamagnetic-bead based method is a reliable and effective method for DNA extraction from DBS and can be adopted for genetic diagnostic purposes.
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Consanguinity profile in the Gaza Strip of Palestine: Large-scale community-based study. Eur J Med Genet 2014; 57:90-4. [DOI: 10.1016/j.ejmg.2014.01.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Accepted: 01/14/2014] [Indexed: 11/19/2022]
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