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thalassemia and hemoglobinopathies

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https://www.readbyqxmd.com/read/28904678/-epidemiological-profile-of-hemoglobinopathies-a-cross-sectional-and-descriptive-index-case-study
#1
Fatima Dahmani, Souad Benkirane, Jaafar Kouzih, Aziz Woumki, Hassan Mamad, Azlarab Masrar
Hemoglobinopathies are congenital disorders resultimg from hemoglobin abnormalities. Major forms are often severe, their management is difficult and associated with a great psychosocial impact on patients and their families. They are classified as rare diseases and are still insufficiently known by health professionals. This lack of knowledge is at the origin of diagnostic errors, delay in their management and therefore high morbidity and mortality rate for these patients. In 2008, the World Health Organization (WHO) has published data on hemoglobinopathies epidemiology: more than 330...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28895851/gene-therapy-approaches-to-hemoglobinopathies
#2
REVIEW
Giuliana Ferrari, Marina Cavazzana, Fulvio Mavilio
Gene therapy for hemoglobinopathies is currently based on transplantation of autologous hematopoietic stem cells genetically modified with a lentiviral vector expressing a globin gene under the control of globin transcriptional regulatory elements. Preclinical and early clinical studies showed the safety and potential efficacy of this therapeutic approach as well as the hurdles still limiting its general application. In addition, for both beta-thalassemia and sickle cell disease, an altered bone marrow microenvironment reduces the efficiency of stem cell harvesting as well as engraftment...
October 2017: Hematology/oncology Clinics of North America
https://www.readbyqxmd.com/read/28865746/rapid-targeted-next-generation-sequencing-platform-for-molecular-screening-and-clinical-genotyping-in-subjects-with-hemoglobinopathies
#3
Xuan Shang, Zhiyu Peng, Yuhua Ye, Asan, Xinhua Zhang, Yan Chen, Baosheng Zhu, Wangwei Cai, Shaoke Chen, Ren Cai, Xiaoling Guo, Chonglin Zhang, Yuqiu Zhou, Shuodan Huang, Yanhui Liu, Biyan Chen, Shanhuo Yan, Yajun Chen, Hongmei Ding, Xiaolin Yin, Liusong Wu, Jing He, Dongai Huang, Sheng He, Tizhen Yan, Xin Fan, Yuehong Zhou, Xiaofeng Wei, Sumin Zhao, Decheng Cai, Fengyu Guo, Qianqian Zhang, Yun Li, Xuelian Zhang, Haorong Lu, Huajie Huang, Junfu Guo, Fei Zhu, Yuan Yuan, Li Zhang, Na Liu, Zhiming Li, Hui Jiang, Qiang Zhang, Yijia Zhang, Wan Khairunnisa Wan Juhari, Sarifah Hanafi, Wanjun Zhou, Fu Xiong, Huanming Yang, Jian Wang, Bin Alwi Zilfalil, Ming Qi, Yaping Yang, Ye Yin, Mao Mao, Xiangmin Xu
Hemoglobinopathies are among the most common autosomal-recessive disorders worldwide. A comprehensive next-generation sequencing (NGS) test would greatly facilitate screening and diagnosis of these disorders. An NGS panel targeting the coding regions of hemoglobin genes and four modifier genes was designed. We validated the assay by using 2522 subjects affected with hemoglobinopathies and applied it to carrier testing in a cohort of 10,111 couples who were also screened through traditional methods. In the clinical genotyping analysis of 1182 β-thalassemia subjects, we identified a group of additional variants that can be used for accurate diagnosis...
August 17, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28836463/prevalence-incidence-trend-and-complications-of-thalassemia-in-iraq
#4
Kamal A Kadhim, Kadhim H Baldawi, Faris H Lami
Globally, thalassemia is the most common hereditary hemoglobinopathy, and occurs in 4.4/10,000 live births. In the developing world, the majority of patients die before the age of 20 years. In Iraq, there is little data on the epidemiology and burden of thalassemia. The objectives of this study were to determine the prevalence, incidence, trend, and complications of thalassemia patients in Iraq. All thalassemia patients registered in the accessible 16 (of the 19) thalassemia centers in Iraq until December 31 2015, were included...
August 24, 2017: Hemoglobin
https://www.readbyqxmd.com/read/28777854/-a-novel-double-heterozygote-of-hbb-c-219t-a-220g-t-gene-diagnosis-and-pedigree-analysis
#5
Jiezhong Lv, Zhaofan Luo, Jianpei Fang, Tao Du, Hongman Xue, Yong Liu, Jianping Zhang
OBJECTIVE: To identify a novel hemoglobinopathy applied by direct sequencing and clone sequencing. METHODS: EDTA anticoagulated blood of proband and his parents were analyzed by hematology analyzers and Capillarys hemoglobin electrophoresis (CE). Then thalassemia genetypes were screened by gap-PCR and reverse dot blot (RDB). Proband was suspected with abnormal hemoglobin combine alpha beta compound thalassemia. The mutation of beta-globin was identified by direct sequencing and clone sequencing...
August 10, 2017: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/28766840/high-birth-prevalence-of-sickle-cell-disease-in-northwestern-tanzania
#6
Emmanuela E Ambrose, Julie Makani, Neema Chami, Tulla Masoza, Rogatus Kabyemera, Robert N Peck, Erasmus Kamugisha, Alphaxard Manjurano, Neema Kayange, Luke R Smart
BACKGROUND: Worldwide, hemoglobinopathies affect millions of children. Identification of hemoglobin disorders in most sub-Saharan African countries is delayed until clinical signs of the disease are present. Limited studies have been conducted to understand their prevalence and clinical presentation among newborns in resource-limited settings. METHODOLOGY: This was a prospective cohort study. Newborns (aged 0-7 days) at two hospitals in Northwestern Tanzania were enrolled and followed prospectively for 6 months...
August 2, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28683515/profile-of-reproductive-issues-associated-with-different-sickle-cell-disease-genotypes
#7
Flávia Anchielle Carvalho, Ariani Impieri Souza, Ana Laura Carneiro Gomes Ferreira, Simone da Silva Neto, Ana Carolina Pessoa de Lima Oliveira, Maria Luiza Rodrigues Pinheiro Gomes, Manuela Freire Hazin Costa
Purpose To describe the reproductive variables associated with different sickle cell disease (SCD) genotypes and the influence of contraceptive methods on acute painful episodes among the women with the homozygous hemoglobin S (HbSS) genotype. Methods A cross-sectional study was conducted between September of 2015 and April of 2016 on 158 women afflicted with SCD admitted to a hematology center in the Northeast of Brazil. The reproduction-associated variables of different SCD genotypes were assessed using the analysis of variance (ANOVA) test to compare means, and the Kruskal-Wallis test to compare medians...
August 2017: Revista Brasileira de Ginecologia e Obstetrícia
https://www.readbyqxmd.com/read/28673501/management-of-iron-overload-in-hemoglobinopathies
#8
S Allali, M de Montalembert, V Brousse, M Chalumeau, Z Karim
Hemoglobinopathies, thalassemia and sickle cell disease are among the most frequent monogenic diseases in the world. Transfusion has improved dramatically their prognosis, but provokes iron overload, which induces multiple organ damages. Iron overload is related to accumulation of iron released from hemolysis and transfused red cell, but also, in thalassemic patients, secondary to ineffective erythropoiesis, which increases intestinal iron absorption via decreased hepcidin production. Transfusion-related cardiac iron overload remains a main cause of death in thalassemia in well-resourced countries, and is responsible for severe hepatic damages in sickle cell disease...
June 30, 2017: Transfusion Clinique et Biologique: Journal de la Société Française de Transfusion Sanguine
https://www.readbyqxmd.com/read/28669403/a-genetic-variant-ameliorates-%C3%AE-thalassemia-severity-by-epigenetic-mediated-elevation-of-human-fetal-hemoglobin-expression
#9
Diyu Chen, Yangjin Zuo, Xinhua Zhang, Yuhua Ye, Xiuqin Bao, Haiyan Huang, Wanicha Tepakhan, Lijuan Wang, Junyi Ju, Guangfu Chen, Mincui Zheng, Dun Liu, Shuodan Huang, Lu Zong, Changgang Li, Yajun Chen, Chenguang Zheng, Lihong Shi, Quan Zhao, Qiang Wu, Supan Fucharoen, Cunyou Zhao, Xiangmin Xu
A delayed fetal-to-adult hemoglobin (Hb) switch ameliorates the severity of β-thalassemia and sickle cell disease. The molecular mechanism underlying the epigenetic dysregulation of the switch is unclear. To explore the potential cis-variants responsible for the Hb switching, we systematically analyzed an 80-kb region spanning the β-globin cluster using capture-based next-generation sequencing of 1142 Chinese β-thalassemia persons and identified 31 fetal hemoglobin (HbF)-associated haplotypes of the selected 28 tag regulatory single-nucleotide polymorphisms (rSNPs) in seven linkage disequilibrium (LD) blocks...
July 6, 2017: American Journal of Human Genetics
https://www.readbyqxmd.com/read/28615064/anti-toxoplasma-gondii-antibodies-in-patients-with-beta-hemoglobinopathies-the-first-report-in-the-americas
#10
Marina Neves Ferreira, Claudia Regina Bonini-Domingos, Isabeth Fonseca Estevão, Clarice Lopes de Castro Lobo, Gisele Cristina Souza Carrocini, Aparecida Perpétuo Silveira-Carvalho, Octávio Ricci, Luiz Carlos de Mattos, Cinara Cássia Brandão de Mattos
BACKGROUND: In Brazil, there have been no previous studies of Toxoplasma gondii infection in sickle cell anemia patients and carriers of severe forms of beta-thalassemia. This study evaluated T. gondii infection in patients with beta-hemoglobinopathies. METHODS: A total of 158 samples, 77 (48.7%) men and 81 (51.3%) women, were evaluated. Three groups were formed: G1 (85 patients with sickle cell disease); G2 (11 patients with homozygous beta-thalassemia; G3 (62 patients with heterozygous beta-thalassemia)...
June 14, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28605432/molecular-diagnosis-of-thalassemias-and-hemoglobinopathies-an-aclps-critical-review
#11
Daniel E Sabath
Objectives: To describe the use of molecular diagnostic techniques for patients with hemoglobin disorders. Methods: A clinical scenario is presented in which molecular diagnosis is important for genetic counseling. Globin disorders, techniques for their diagnosis, and the role of molecular genetic testing in managing patients with these disorders are described in detail. Results: Hemoglobin disorders, including thalassemias and hemoglobinopathies, are among the commonest genetic diseases, and the clinical laboratory is essential for the diagnosis of patients with these abnormalities...
June 12, 2017: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28602890/posterior-reversible-encephalopathy-syndrome-after-hematopoietic-cell-transplantation-in-children-with-hemoglobinopathies
#12
Javid Gaziev, Simone Marziali, Katia Paciaroni, Antonella Isgrò, Francesca Di Giuliano, Giorgia Rossi, Marco Marziali, Gioia De Angelis, Cecilia Alfieri, Michela Ribersani, Marco Andreani, Maria Giuseppina Palmieri, Fabio Placidi, Andrea Romigi, Francesca Izzi, Roberto Floris, Nicola Biagio Mercuri
Posterior reversible encephalopathy syndrome (PRES) is a serious adverse event associated with calcineurin inhibitors used for graft-versus-host disease (GVHD) prophylaxis. We compared the incidence of PRES in children with thalassemia (n = 222, 1.4 to 17.8 years old) versus sickle cell disease (SCD; n = 59, 2 to 17 years old) who underwent hematopoietic cell transplantation from HLA-matched siblings or alternative donors and analyzed the risk factors for PRES. Overall, 31 children developed calcineurin inhibitor-related PRES (11%), including 30 patients with seizures and 1 patient without seizures...
September 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28596657/increased-level-of-factor-viii-and-physiological-inhibitors-of-coagulation-in-patients-with-sickle-cell-disease
#13
Mohamed Chekkal, Mohamed Chakib Arslane Rahal, Khedidja Moulasserdoun, Fatima Seghier
Sickle cell disease (SCD) is a hemoglobinopathy characterized by hemolysis, oxidative stress, and vaso-occlusive crises. Thromboembolism also remains a serious complication and probably underestimated in the SCD. Our objective was to seek the existence of hemostasis abnormalities that predispose to thrombosis such as elevation of FVIII and Physiological inhibitors of coagulation deficiency. We studied 81 patients with SCD, including 32 homozygous S/S, 20 double heterozygous S/β thalassemia and 29 heterozygous S/A...
June 2017: Indian Journal of Hematology & Blood Transfusion
https://www.readbyqxmd.com/read/28497434/thalassemia-and-hemoglobinopathies-in-an-ethnic-minority-group-in-central-vietnam-implications-to-health-burden-and-relationship-between-two-ethnic-minority-groups
#14
Nga Thi Nguyen, Kanokwan Sanchaisuriya, Pattara Sanchaisuriya, Hoa Van Nguyen, Hoa Thi Thuy Phan, Goonnapa Fucharoen, Supan Fucharoen
Thalassemia is a genetic condition that can result in long and expensive treatments, and severe thalassemia may lead to death if left untreated. Couples contributing two genes for thalassemia place their children at particular risk for severe thalassemia. Gene frequency of thalassemia varies in Vietnam, but presents remarkably high levels among some ethnic minority groups. Limited information about thalassemia frequency makes prevention and control of thalassemia difficult. This study aimed to determine gene frequency of certain types of thalassemia among 390 women of reproductive age of the Ta-Oi ethnic minority...
July 2017: Journal of Community Genetics
https://www.readbyqxmd.com/read/28483223/temporal-bone-extramedullary-hematopoiesis-as-a-causeof-pediatric-bilateral-conductive-hearing-loss-case-report-and-review-of-the-literature
#15
REVIEW
Alexander Lanigan, M Taylor Fordham
Extramedullary hematopoiesis occurs in children with hemoglobinopathy and chronic anemia. The liver and spleen are often affected first, but other foci can develop to support erythrocyte demand. We report a case of a nine-year-old with beta thalassemia and temporal bone extramedullary hematopoiesis causing ossicular fixation and bilateral conductive hearing loss. There is only one case in the literature describing this phenomenon in pediatric patients, and this is the first case report of bilateral hearing loss from this physiologic phenomenon...
June 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28475397/complex-interaction-of-hb-q-thailand-with-%C3%AE-0-and-%C3%AE-0-thalassemia-in-a-chinese-family
#16
Sheng He, Qian Qin, Li Lin, Qiuli Chen, Shang Yi, Honhwei Wei, Juan Du, Chenguang Zheng, Xiaoxia Qiu, Biyan Chen
Hb Q-Thailand [α74(EF3)Asp→His (α1); HBA1: c.223 G>C] is an abnormal hemoglobin (Hb), variant found mainly in China and Southeast Asian countries. The association of the α(Q)-Thailand allele with other globin gene disorders has important implications in diagnosis. Here, we report a hitherto undescribed condition of patients with a double heterozygosity for Hb Q-Thailand with α(0)-thalassemia (α(0)-thal) and in combination with β(0)-thalassemia (β(0)-thal) in a Chinese family. Our study will provide some clinical manifestations, laboratory diagnosis and genetic counseling for complex hemoglobinopathies...
January 2017: Hemoglobin
https://www.readbyqxmd.com/read/28409222/incidental-splenic-nodules-found-on-mr-imaging-done-for-assessment-of-iron-overload-in-children
#17
Rayan A Ahyad, Christopher Z Lam, Omid Shearkhani, Oscar M Navarro
BACKGROUND: MR imaging is used to assess iron overload in patients with hemoglobinopathies and in those who have undergone multiple blood transfusions. Sometimes splenic nodules are found incidentally on these examinations and this may cause diagnostic uncertainty. OBJECTIVE: To determine the prevalence, imaging characteristics and evolution of splenic nodules found on MR imaging for iron overload evaluation. MATERIALS AND METHODS: Retrospective review of all MR imaging examinations performed for iron overload assessment from 2005 to 2015 in a tertiary pediatric hospital...
April 13, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28404539/a-national-registry-of-thalassemia-in-turkey-demographic-and-disease-characteristics-of-patients-achievements-and-challenges-in-prevention
#18
Yeşim Aydınok, Yeşim Oymak, Berna Atabay, Gönül Aydoğan, Akif Yeşilipek, Selma Ünal, Yurdanur Kılınç, Banu Oflaz, Mehmet Akın, Canan Vergin, Melike Sezgin Evim, Ümran Çalışkan, Şule Ünal, Ali Bay, Elif Kazancı, Dilber Talia İleri, Didem Atay, Türkan Patıroğlu, Selda Kahraman, Murat Söker, Mediha Akcan, Aydan Akdeniz, Mustafa Büyükavcı, Güçhan Alanoğlu, Özcan Bör, Nur Soyer, Nihal Özdemir Karadaş, Ezgi Uysalol, Meral Türker, Arzu Akçay, Süheyla Ocak, Adalet Meral Güneş, Hüseyin Tokgöz, Zümrüt Uysal, Naci Tiftik, Zeynep Karakaş
Turkish Society of Pediatric Hematology set up a National Hemoglobinopathy Registry to demonstrate demographic and disease characteristics of patients, and assessed the efficacy of hemoglobinopathy control program (HCP) over 10 years in Turkey. A total of 2046 patients from 27 Thalassemia Centers were registered in which 1988 were eligible for analysis. This cohort mainly comprised patients with β-thalassemia major (n=1658, 83.4%) and intermedia (n=215, 10.8%). The majority of patients were accumulated into the costal areas of Turkey...
April 13, 2017: Turkish Journal of Haematology: Official Journal of Turkish Society of Haematology
https://www.readbyqxmd.com/read/28383138/evaluation-of-four-hemoglobin-separation-analyzers-for-hemoglobinopathy-diagnosis
#19
Simon Degandt, Rémy Coens, Barbara Cauwelier, Helena Devos, Michel Langlois, Jan Emmerechts
BACKGROUND: Four automated hemoglobin separation devices are compared in their ability to detect hemoglobinopathies, both in HbA1c and in hemoglobinopathy mode. METHODS: Quality control material and 58 samples, including one heterozygous α-thalassemia sample, six heterozygote β-thalassemia samples and 32 samples with a known hemoglobin variant, were used to assess imprecision of HbF and HbA2 measurements, correlation with the gold standard and sensitivity for detecting β-thalassemia and Hb variants on D-100 (Bio-Rad Laboratories), HA 8180T (Menarini), HLC-723G8 (Tosoh Bioscience) and Capillarys 2 Flex Piercing (Sebia)...
April 6, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28379995/investigation-of-mutations-in-the-hbb-gene-using-the-1-000-genomes-database
#20
Tânia Carlice-Dos-Reis, Jaime Viana, Fabiano Cordeiro Moreira, Greice de Lemos Cardoso, João Guerreiro, Sidney Santos, Ândrea Ribeiro-Dos-Santos
Mutations in the HBB gene are responsible for several serious hemoglobinopathies, such as sickle cell anemia and β-thalassemia. Sickle cell anemia is one of the most common monogenic diseases worldwide. Due to its prevalence, diverse strategies have been developed for a better understanding of its molecular mechanisms. In silico analysis has been increasingly used to investigate the genotype-phenotype relationship of many diseases, and the sequences of healthy individuals deposited in the 1,000 Genomes database appear to be an excellent tool for such analysis...
2017: PloS One
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