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Yusof W, Zulkifli MM, Azman NF, Ab Hamid SA, Othman A, Draman N, Zilfalil BA, Hassan R, Abdullah WZ. Factors affecting health-related quality of life and its association with the Xmn1-Gγ polymorphism among adolescents with transfusion-dependent beta thalassemia and HbE/β-thalassemia in East Coast Malaysia. PEDIATRIC HEMATOLOGY ONCOLOGY JOURNAL 2020. [DOI: 10.1016/j.phoj.2020.04.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Said F, Abdel-Salam A. XmnI polymorphism: Relation to β-thalassemia phenotype and genotype in Egyptian Children. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2015. [DOI: 10.1016/j.ejmhg.2014.12.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Yang G, Shi W, Hu X, Zhang J, Gong Z, Guo X, Ren Z, Zeng F. Therapeutic effects of induced pluripotent stem cells in chimeric mice with β-thalassemia. Haematologica 2014; 99:1304-11. [PMID: 24816238 DOI: 10.3324/haematol.2013.087916] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Although β-thalassemia is one of the most common human genetic diseases, there is still no effective treatment other than bone marrow transplantation. Induced pluripotent stem cells have been considered good candidates for the future repair or replacement of malfunctioning organs. As a basis for developing transgenic induced pluripotent stem cell therapies for thalassemia, β(654) induced pluripotent stem cells from a β(654) -thalassemia mouse transduced with the normal human β-globin gene, and the induced pluripotent stem cells with an erythroid-expressing reporter GFP were used to produce chimeric mice. Using these chimera models, we investigated changes in various pathological indices including hematologic parameters and tissue pathology. Our data showed that when the chimerism of β(654) induced pluripotent stem cells with the normal human β-globin gene in β(654) mice is over 30%, the pathology of anemia appeared to be reversed, while chimerism ranging from 8% to 16% provided little improvement in the typical β-thalassemia phenotype. Effective alleviation of thalassemia-related phenotypes was observed when chimerism with the induced pluripotent stem cells owning the erythroid-expressing reporter GFP in β(654) mouse was greater than 10%. Thus, 10% or more expression of the exogenous normal β-globin gene reduces the degree of anemia in our β-thalassemia mouse model, whereas treatment with β(654) induced pluripotent stem cells which had the normal human β-globin gene had stable therapeutic effects but in a more dose-dependent manner.
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Affiliation(s)
- Guanheng Yang
- Shanghai Institute of Medical Genetics, Shanghai Children's Hospital, Shanghai Jiao Tong University Insitute of Medical Science, School of Medicine, Shanghai Jiaotong University Key Laboratory of Embryo Molecular Biology, Ministry of Health of China and Shanghai Laboratory of Embryo and Reproduction Engineering, China
| | - Wansheng Shi
- Insitute of Medical Science, School of Medicine, Shanghai Jiaotong University
| | - Xingyin Hu
- Shanghai Institute of Medical Genetics, Shanghai Children's Hospital, Shanghai Jiao Tong University Insitute of Medical Science, School of Medicine, Shanghai Jiaotong University Key Laboratory of Embryo Molecular Biology, Ministry of Health of China and Shanghai Laboratory of Embryo and Reproduction Engineering, China
| | - Jingzhi Zhang
- Shanghai Institute of Medical Genetics, Shanghai Children's Hospital, Shanghai Jiao Tong University Key Laboratory of Embryo Molecular Biology, Ministry of Health of China and Shanghai Laboratory of Embryo and Reproduction Engineering, China
| | - Zhijuan Gong
- Shanghai Institute of Medical Genetics, Shanghai Children's Hospital, Shanghai Jiao Tong University Key Laboratory of Embryo Molecular Biology, Ministry of Health of China and Shanghai Laboratory of Embryo and Reproduction Engineering, China
| | - Xinbing Guo
- Shanghai Institute of Medical Genetics, Shanghai Children's Hospital, Shanghai Jiao Tong University Key Laboratory of Embryo Molecular Biology, Ministry of Health of China and Shanghai Laboratory of Embryo and Reproduction Engineering, China
| | - Zhaorui Ren
- Shanghai Institute of Medical Genetics, Shanghai Children's Hospital, Shanghai Jiao Tong University Key Laboratory of Embryo Molecular Biology, Ministry of Health of China and Shanghai Laboratory of Embryo and Reproduction Engineering, China
| | - Fanyi Zeng
- Shanghai Institute of Medical Genetics, Shanghai Children's Hospital, Shanghai Jiao Tong University Insitute of Medical Science, School of Medicine, Shanghai Jiaotong University Key Laboratory of Embryo Molecular Biology, Ministry of Health of China and Shanghai Laboratory of Embryo and Reproduction Engineering, China
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Grosso M, Puzone S, Storino MR, Sessa R, Izzo P. Prenatal diagnosis of haemoglobinopathies: our experience of 523 cases. Clin Chem Lab Med 2013; 51:2219-25. [PMID: 23612661 DOI: 10.1515/cclm-2013-0195] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Accepted: 03/08/2013] [Indexed: 11/15/2022]
Abstract
BACKGROUND We performed counselling for prenatal diagnosis (PD) of haemoglobinopathies in 372 couples. Thirty-four out of 372 (9.1%) did not undergo PD: six due to spontaneous abortion; nine because it was too difficult to make a decision if PD was positive; 18 because counselling excluded the carrier status of one or both parents; and one because parental mutations were mild. METHODS Eleven out of 338 (3.3%) couples underwent PD because they had a thalassaemic child; 106 (31.4%) were found to be at high risk during pre-conceptional screening; 221 (65.4%) because of familiarity. Of 523 PDs in 486 (92.9%), including six dichorionic twin pregnancies, PD was performed on DNA from chorionic villi (CV), and in 37 from amniocytes (7.1%). In 1/523 cases, PD was not completed because DNA from CV was not sufficient; in two cases single tandem repeat analysis revealed maternal contamination of foetal DNA; in 7/522 (1.3%) cases PD revealed non-paternity. In 435/522 (83.3%) cases, PD was performed using reverse dot-blot and ARMS; 34/522 (6.5%) required sequencing. In 53/522 (10.2%) cases it was necessary to test globin loci for large rearrangements. RESULTS One hundred and twenty out of 522 (23.0%) PDs revealed an affected foetus. In all but two cases the couple interrupted pregnancy. In the six twin pregnancies PD revealed a normal and a carrier foetus (two cases), carrier status in both foetuses (two cases) and a carrier and an affected foetus (two cases). In these latter cases the couple planned selective interruption. CONCLUSIONS Our PD procedure is successful and reliable, and is useful in high-risk areas characterised by molecular heterogeneity.
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Moleirinho A, Seixas S, Lopes AM, Bento C, Prata MJ, Amorim A. Evolutionary constraints in the β-globin cluster: the signature of purifying selection at the δ-globin (HBD) locus and its role in developmental gene regulation. Genome Biol Evol 2013; 5:559-71. [PMID: 23431002 PMCID: PMC3622298 DOI: 10.1093/gbe/evt029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/16/2013] [Indexed: 12/15/2022] Open
Abstract
Human hemoglobins, the oxygen carriers in the blood, are composed by two α-like and two β-like globin monomers. The β-globin gene cluster located at 11p15.5 comprises one pseudogene and five genes whose expression undergoes two critical switches: the embryonic-to-fetal and fetal-to-adult transition. HBD encodes the δ-globin chain of the minor adult hemoglobin (HbA2), which is assumed to be physiologically irrelevant. Paradoxically, reduced diversity levels have been reported for this gene. In this study, we sought a detailed portrait of the genetic variation within the β-globin cluster in a large human population panel from different geographic backgrounds. We resequenced the coding and noncoding regions of the two adult β-globin genes (HBD and HBB) in European and African populations, and analyzed the data from the β-globin cluster (HBE, HBG2, HBG1, HBBP1, HBD, and HBB) in 1,092 individuals representing 14 populations sequenced as part of the 1000 Genomes Project. Additionally, we assessed the diversity levels in nonhuman primates using chimpanzee sequence data provided by the PanMap Project. Comprehensive analyses, based on classic neutrality tests, empirical and haplotype-based studies, revealed that HBD and its neighbor pseudogene HBBP1 have mainly evolved under purifying selection, suggesting that their roles are essential and nonredundant. Moreover, in the light of recent studies on the chromatin conformation of the β-globin cluster, we present evidence sustaining that the strong functional constraints underlying the decreased contemporary diversity at these two regions were not driven by protein function but instead are likely due to a regulatory role in ontogenic switches of gene expression.
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Affiliation(s)
- Ana Moleirinho
- Institute of Molecular Pathology and Immunology of University of Porto (IPATIMUP), Porto, Portugal.
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Xie S, Li W, Ren Z, Zhang J, Guo X, Wang S, Huang S, Zeng F, Zeng YT. Amelioration of beta654-thalassemia in mouse model with the knockdown of aberrantly spliced beta-globin mRNA. J Genet Genomics 2009; 35:595-601. [PMID: 18937916 DOI: 10.1016/s1673-8527(08)60080-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2008] [Revised: 08/31/2008] [Accepted: 09/02/2008] [Indexed: 11/19/2022]
Abstract
Large amounts of aberrantly spliced mRNA from the beta(654) allele was present in erythroid cells, which might impair the erythropoiesis. A therapeutic strategy for beta-thalassemia was explored by knocking down the aberrantly spliced mRNA of beta-globin. Lentiviral vector with siRNA fragment targets on the specific portion of beta(654)-globin aberrantly spliced pre-mRNA was constructed. In HeLa beta(654) cells, the siRNA vector could reduce approximately 60% of aberrantly spliced mRNA, which was assessed by RT-PCR and qRT-PCR. Furthermore, a disease model of beta(654) thalassemia mice with lentiviral-mediated siRNA was produced by subzonal injection (named Hbetai-Hbb(th-4)/Hbb(+) transgenic mice). Our results showed that the hemotological parameters were improved in Hbetai-Hbb(th-4)/Hbb(+) transgenic mice. This study provides a potential way for beta(654)-thalassemia therapy by knocking down the aberrantly spliced beta-globin mRNA, whilst supporting that the aberrantly spliced beta-globin mRNA may aggravate the disease.
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Affiliation(s)
- Shuyang Xie
- Shanghai Institute of Medical Genetics, Shanghai Children's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200040, China
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Grosso M, Amendolara M, Rescigno G, Danise P, Todisco N, Izzo P, Amendola G. Delayed decline of gamma-globin expression in infant age associated with the presence of Ggamma-158 (C-->T) polymorphism. Int J Lab Hematol 2008; 30:191-5. [PMID: 18479296 DOI: 10.1111/j.1751-553x.2007.00946.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Persistent production of fetal hemoglobin (HbF) in adult has ameliorative effects on hemoglobinopathies and great efforts are currently made to achieve an exhaustive understanding of the molecular mechanisms of the switching in globin gene expression. One of the factors reported to be associated with the expression of fetal globin genes is the Xmn I Ggamma-158 polymorphism, although it is still unclear if it is involved in this mechanism either by itself or in strong linkage disequilibrium with other loci. Here, we report a novel effect of the Xmn I Ggamma-158 site that was found associated with a significant delayed decline of HbF production in infant age. The prolonged decay trend was enhanced when the Ggamma-158 C-->T substitution was co-inherited with a beta-thalassemic trait. Our observations reinforce the hypothesis that this region plays an important role in the expression of the gamma-globin genes and give new insights on the intriguing and still poorly understood mechanisms of globin gene expression switching.
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Affiliation(s)
- M Grosso
- Department of Biochemistry and Medical Biotechnologies and Ceinge-Biotecnologie Avanzate, University of Naples Federico II, Italy
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Xie SY, Ren ZR, Zhang JZ, Guo XB, Wang QX, Wang S, Lin D, Gong XL, Li W, Huang SZ, Zeng F, Zeng YT. Restoration of the balanced alpha/beta-globin gene expression in beta654-thalassemia mice using combined RNAi and antisense RNA approach. Hum Mol Genet 2007; 16:2616-25. [PMID: 17716993 DOI: 10.1093/hmg/ddm218] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The beta-thalassemia is associated with abnormality in beta-globin gene, leading to imbalanced synthesis of alpha-/beta-globin chains. Consequently, the excessive free alpha-globin chains precipitate to the erythrocyte membrane, resulting in hemolytic anemia. We have explored post-transcriptional strategies aiming at alpha-globin reduction and beta-globin enrichment on beta(654) (Hbb(th-4)/Hbb(+)) mouse, carrying a human splicing-deficient beta-globin allele (Hbb(th-4)). Lentiviral vectors of short hairpin RNA (shRNA) targeting alpha-globin and/or antisense RNA facilitating beta-globin correct splicing were microinjected into beta(654) single-cell embryos. Three transgenic strains were generated, as alpha(i)-Hbb(th-4)/Hbb(+)(shRNA), beta(a)-Hbb(th-4)/Hbb(+)(antisense) and alpha(i)beta(a)-Hbb(th-4)/Hbb(+)(both shRNA and antisense). Without notable abnormalities, all the founders and their offsprings showed sustained amelioration of hematologic parameters, ineffective erythropoiesis and extramedullary hematopoiesis. Augmented effects appeared in alpha(i)beta(a)-Hbb(th-4)/Hbb(+), which correlated with a better-balanced alpha-/beta-globin mRNA level. Among the transgenic mice integrated with shRNA and antisense RNA, one homozygous mouse (Hbb(th-4)/Hbb(th-4)) had been viable, and the 3-week survival rate for heterozygotes (Hbb(th-4)/Hbb(+)) was 97%, compared with 45.4% for untreated. Our data have demonstrated the feasibility of techniques for beta-thalassemia therapy by balancing the synthesis of alpha-/beta-globin chains.
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Affiliation(s)
- Shu-Yang Xie
- Shanghai Institute of Medical Genetics, Shanghai Children's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
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