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Zitouni S, Bouatrous E, Laabidi O, Boudrigua I, Chaouachi D, Saidani N, Kraiem I, Ayachi A, Abbes S, Mourali M, Menif S, Ouragini H. Tunisian Newborn's Cord Blood: Reference Values of Complete Blood Count and Hemoglobin Fractions. Am J Perinatol 2022; 39:1241-1247. [PMID: 33374024 DOI: 10.1055/s-0040-1722199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
OBJECTIVE This study was aimed to establish local reference values for hematological indices and hemoglobin (Hb) fractions in umbilical cord blood (UCB) for the northern population of Tunisia. STUDY DESIGN Our study included full-term newborns by vaginal deliveries. Hematological parameters were collected using an automated blood cell counter. The amounts of Hb fractions were measured by capillary electrophoresis of Hb. Statistical analysis was performed using R software. RESULTS A total of 328 cord blood samples were analyzed. Among them, 154 (male: 44.8%, female: 55.2%) were used to establish reference values. The normal reference values of complete blood count (CBC) and Hb fractions were calculated. Mean neonatal Hb was 14.75 ± 2.26 g/dL. Gestational age affects the expression of CBC values as red blood cell (RBC), Hb, hematocrit (Hct), mean corpuscular volume (MCV), white blood cell (WBC), and the Hb profile. Umbilical blood hemogram parameters and Hb profile are affected by the environment; higher in newborns from urban regions but not affected by gender ratio. CONCLUSION Reference ranges of normal CBC indices and Hb fractions have been successfully established in Tunisian neonates' UCB. Our data suggest reference values that could be useful for neonatal patients' laboratory results and clinical interpretation. KEY POINTS · Reference values for CBC and hemoglobin fractions have been established.. · Hematological reference for UCB is useful to identify hemolytic anemia cases early.. · UCB hematological values are influenced by gestational age and probably by environmental factors..
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Affiliation(s)
- Sana Zitouni
- Laboratory of Molecular and Cellular Hematology, Pasteur Institute of Tunis, University of Tunis El Manar, Tunis, Tunisia.,Department of Biology, Faculty of Sciences, Carthage University, Jarzouna, Tunisia
| | - Emna Bouatrous
- Laboratory of Molecular and Cellular Hematology, Pasteur Institute of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Ons Laabidi
- Laboratory of Molecular and Cellular Hematology, Pasteur Institute of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Imen Boudrigua
- Laboratory of Molecular and Cellular Hematology, Pasteur Institute of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Dorra Chaouachi
- Laboratory of Molecular and Cellular Hematology, Pasteur Institute of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Naima Saidani
- Department of Gyneco-Obstetrics, Faculty of Medicine of Tunis, University of Tunis El Manar, Hospital Habib Bougatfa, Tunis, Tunisia
| | - Imen Kraiem
- Laboratory of Molecular and Cellular Hematology, Pasteur Institute of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Amira Ayachi
- Department of Gyneco-Obstetrics, Faculty of Medicine of Tunis, University of Tunis El Manar, Hospital Habib Bougatfa, Tunis, Tunisia
| | - Salem Abbes
- Laboratory of Molecular and Cellular Hematology, Pasteur Institute of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Mechaal Mourali
- Department of Gyneco-Obstetrics, Faculty of Medicine of Tunis, University of Tunis El Manar, Hospital Habib Bougatfa, Tunis, Tunisia
| | - Samia Menif
- Laboratory of Molecular and Cellular Hematology, Pasteur Institute of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Houyem Ouragini
- Laboratory of Molecular and Cellular Hematology, Pasteur Institute of Tunis, University of Tunis El Manar, Tunis, Tunisia
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Trabelsi N, Bouguerra G, Haddad F, Ouederni M, Darragi I, Boudrigua I, Chaouachi D, Barmat M, Fouzai C, Bejaoui M, Menif S, Kraiem I, Abbes S. Biochemical, Cellular, and Proteomic Characterization of Hereditary Spherocytosis Among Tunisians. Cell Physiol Biochem 2021; 55:117-129. [PMID: 33667330 DOI: 10.33594/000000333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/02/2021] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND/AIMS Hereditary Spherocytosis (HS) is the most common erythrocyte membrane disorder causing hemolytic anemia. The wide heterogeneity of both clinical and laboratory manifestations of HS contributes to difficulties associated with the diagnosis of this disorder. Although massive data previously reported worldwide, there is yet no data on HS among the Tunisian population. Here we aim to characterize HS in Tunisian patients at biochemical and cellular levels, identify the membrane protein deficiency, and compare the accuracy of the diagnostic tests to identify the most appropriate assay for HS diagnosis. METHODS We investigated 81 patients with hemolytic anemia and 167 normal controls. The exploration of HS based on clinical and family history, physical examination, and the results of laboratory tests: blood smear, osmotic fragility test (OFT), cryohemolysis test (CT), pink test (PT), eosine-5'-maleimide (EMA) test, and erythrocyte membrane protein electrophoresis. RESULTS We identified 21 patients with HS, classified as severe (6/21;28.5%), moderate (10/21;47.6%), and mild (5/21;23.8%). The most prevalent protein deficiency was the band 3 protein detected in ten Tunisian HS patients. The EMA test showed a high specificity (97.5%) and sensitivity (94.7%) for HS diagnosis compared to the other screening tests. Interestingly, fourteen among sixteen patients presenting with homozygous sickle cells HbSS showed an increase of EMA fluorescence intensity compared to other anemic patients. CONCLUSION Our study highlights the efficiency of the EMA dye for the detection of HS whatever the nature of the involved protein deficiency. We report for the first time, the most prevalent protein deficiency among Tunisians with HS. Moreover, we found that the combination of the EMA-binding test with PT or incubated OFT improves the diagnosis sensitivity while maintaining a good specificity.
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Affiliation(s)
- Nawel Trabelsi
- Laboratoire d'Hématologie Moléculaire et Cellulaire (LR16IPT07), Institut Pasteur de Tunis, Tunis, Tunisie, .,Faculté des Sciences de Tunis, Université de Tunis El Manar, Tunis, Tunisie
| | - Ghada Bouguerra
- Laboratoire d'Hématologie Moléculaire et Cellulaire (LR16IPT07), Institut Pasteur de Tunis, Tunis, Tunisie.,Faculté de Médecine de Tunis, Université de Tunis El Manar, Tunis, Tunisie
| | - Faten Haddad
- Laboratoire d'Hématologie Moléculaire et Cellulaire (LR16IPT07), Institut Pasteur de Tunis, Tunis, Tunisie.,Faculté de Médecine de Tunis, Université de Tunis El Manar, Tunis, Tunisie
| | - Monia Ouederni
- Unité d'hématologie-immunologie pédiatrique, Centre National de Transplantation de la Moelle Osseuse, Tunis, Tunisie
| | - Imen Darragi
- Laboratoire d'Hématologie Moléculaire et Cellulaire (LR16IPT07), Institut Pasteur de Tunis, Tunis, Tunisie
| | - Imen Boudrigua
- Laboratoire d'Hématologie Moléculaire et Cellulaire (LR16IPT07), Institut Pasteur de Tunis, Tunis, Tunisie
| | - Dorra Chaouachi
- Laboratoire d'Hématologie Moléculaire et Cellulaire (LR16IPT07), Institut Pasteur de Tunis, Tunis, Tunisie
| | - Mbarka Barmat
- Laboratoire d'Hématologie Moléculaire et Cellulaire (LR16IPT07), Institut Pasteur de Tunis, Tunis, Tunisie
| | - Chaker Fouzai
- Laboratoire d'Hématologie Moléculaire et Cellulaire (LR16IPT07), Institut Pasteur de Tunis, Tunis, Tunisie
| | - Mohamed Bejaoui
- Unité d'hématologie-immunologie pédiatrique, Centre National de Transplantation de la Moelle Osseuse, Tunis, Tunisie
| | - Samia Menif
- Laboratoire d'Hématologie Moléculaire et Cellulaire (LR16IPT07), Institut Pasteur de Tunis, Tunis, Tunisie
| | - Imen Kraiem
- Laboratoire d'Hématologie Moléculaire et Cellulaire (LR16IPT07), Institut Pasteur de Tunis, Tunis, Tunisie
| | - Salem Abbes
- Laboratoire d'Hématologie Moléculaire et Cellulaire (LR16IPT07), Institut Pasteur de Tunis, Tunis, Tunisie.,Faculté de Médecine de Tunis, Université de Tunis El Manar, Tunis, Tunisie
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Trabelsi N, Chaouch L, Haddad F, Jaouani M, Barkaoui E, Darragi I, Chaouachi D, Boudrigua I, Menif S, Abbes S. Novel mutations in Uridyl-diphosphate-glucuronosyl-transferase 1A1 (UGT1A1) gene in Tunisian patients with unconjugated hyperbilirubinemia. Eur J Med Genet 2021; 64:104139. [PMID: 33421605 DOI: 10.1016/j.ejmg.2021.104139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 10/02/2020] [Accepted: 01/03/2021] [Indexed: 11/25/2022]
Abstract
INTRODUCTION Unconjugated hyperbilirubinemia (UCB) is a feature of Gilbert's syndrome (GS) and Crigler-Najjar's syndrome (CNS), which are two hereditary defects in bilirubin metabolism. Both syndromes are linked to mutations in the UGT1A1 gene, which cause either the decrease or the absence of the UGT1A1 enzymatic activity. Here, we investigated the molecular basis of the UGT1A1 gene in Tunisian patients presenting with unconjugated hyperbilirubinemia. METHODS Twenty-four patients with UCB were investigated. The screening protocol for hemoglobinopathies, enzymopathies, and membrane defects was executed in all patients. Afterward, the molecular analysis of the entire UGT1A1 gene was performed by DNA Sanger sequencing. Several bioinformatic tools were used to explore the effects of novel mutations. RESULTS Fifteen different UGT1A1 variations were identified, among which four are described here for the first time. In exon 5, the c.1412C > G; p.(Ala471Gly) and c.1589C > T; p.(Ser530Phe) mutations were detected in patients presenting with CNS type I and GS, respectively. In the 3'UTR region of UGT1A1, the c.*90C > T mutation was detected in 3 patients with CNS type I. In the same region, the c.*388C > T defect was found in a GS patient. A deleterious and damaging effect on the UGT1A1 protein were predicted for both exonic mutations. Furthermore, novel microRNAs were identified as targetting the mutated sequences for the 3'UTR mutations. CONCLUSION Our study provides novel data on UCB among Tunisians. Furthermore, we report four novel mutations associated with both GS and CNS. The identification of these mutations increases the spectrum of the UGT1A1 mutations and contributes to an understanding of the molecular abnormalities associated with unconjugated hyperbilirubinemia.
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Affiliation(s)
- Nawel Trabelsi
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire, Tunisie.
| | - Leila Chaouch
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire, Tunisie; Université de Sousse, Faculté de Médecine de Sousse, Tunisie
| | - Faten Haddad
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire, Tunisie
| | - Mouna Jaouani
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire, Tunisie
| | - Emna Barkaoui
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire, Tunisie
| | - Imen Darragi
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire, Tunisie
| | - Dorra Chaouachi
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire, Tunisie
| | - Imen Boudrigua
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire, Tunisie
| | - Samia Menif
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire, Tunisie
| | - Salem Abbes
- Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire, Tunisie
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Kalai M, Dridi M, Chaouch L, Moumni I, Ouragini H, Darragi I, Boudrigua I, Chaouachi D, Mellouli F, Bejaoui M, Abbes S. The role of rs1984112_G at CD36 gene in increasing reticulocyte level among sickle cell disease patients. ACTA ACUST UNITED AC 2016; 22:178-182. [PMID: 27869039 DOI: 10.1080/10245332.2016.1253253] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AIMS AND BACKGROUND Mediators of adhesion become a potential new target for pharmacological therapy to struggle the complications of sickle cell disease (SCD). Several mechanisms for increased adherence have been postulated and the well-studied are CD36 and VLA4 which encoded by ITGA4. Herein, we sought to determine whether one polymorphism of CD36 namely: rs1984112 and three exons of ITGA4 (4, 5, and 6) are implicated in hemolytic status and clinical events among SCD Tunisian patients. MATERIAL AND METHODS This study enrolled 99 unrelated Tunisian subjects (63SS and 36Sβ). All SCD patients are children (less than 16 years old). The rs1984112 and the ITGA4's exons 4, 5, and 6 were analyzed for all subjects by PCR/sequencing. The association of each genotype found with both clinical complications and hemolytic status was performed using t-test. Clinical events studied included vaso-occlusive crisis (VOC), osteonecrosis, stroke, frequent infection, priapism, and acute syndrome. RESULTS The results show that rs1984112_G allele at CD36 gene revealed to be associated with higher levels of reticulocyte count (p < 0.01). The statistical result show a near significance of homozygous mutant GG genotype with VOC (p = 0.051). No association between rs1984112_G allele and the clinical severity of SCD were found. Mutational screening of exon 4, 5, and 6 of ITGA4 gene revealed absence of mutated variant. CONCLUSION Our results are similar to those found in Portuguese population which reported the role of rs1984112_G in increasing reticulocyte level among SCD patients. Consequently, the rs1984112_G of CD36 could be considered as a reliable biomarker for predicting patients at high risk for vascular occlusions and thus, allows earlier and more effective therapeutic management.
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Affiliation(s)
- Miniar Kalai
- a Université de Tunis El Manar, Institut Pasteur de Tunis , Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisia
| | - Marwa Dridi
- a Université de Tunis El Manar, Institut Pasteur de Tunis , Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisia
| | - Leila Chaouch
- a Université de Tunis El Manar, Institut Pasteur de Tunis , Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisia
| | - Imen Moumni
- a Université de Tunis El Manar, Institut Pasteur de Tunis , Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisia
| | - Houyem Ouragini
- a Université de Tunis El Manar, Institut Pasteur de Tunis , Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisia
| | - Imen Darragi
- a Université de Tunis El Manar, Institut Pasteur de Tunis , Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisia
| | - Imen Boudrigua
- a Université de Tunis El Manar, Institut Pasteur de Tunis , Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisia
| | - Dorra Chaouachi
- a Université de Tunis El Manar, Institut Pasteur de Tunis , Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisia
| | - Fethi Mellouli
- a Université de Tunis El Manar, Institut Pasteur de Tunis , Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisia
| | - Mohamed Bejaoui
- a Université de Tunis El Manar, Institut Pasteur de Tunis , Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisia
| | - Salem Abbes
- a Université de Tunis El Manar, Institut Pasteur de Tunis , Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisia
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Chaouch L, Moumni I, Ouragini H, Darragi I, Kalai M, Chaouachi D, Boudrigua I, Hafsia R, Abbes S. rs11886868 and rs4671393 of BCL11A associated with HbF level variation and modulate clinical events among sickle cell anemia patients. Hematology 2016:1-5. [PMID: 26125973 DOI: 10.1179/1607845415y.0000000026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
AIMS Fetal hemoglobin (HbF) modulates the phenotype of sickle cell anemia (SCA) by inhibiting deoxy sickle hemoglobin (HbS) polymerization. HbF genes are genetically regulated, and the level of HbF and its distribution among sickle erythrocytes is highly variable. Herein, we aimed to determine whether two functional polymorphisms of BCL11A are implicated in the variation of HbF and clinical events in SCA Tunisian patients. MATERIAL AND METHODS The studied population consisted of 148 SCA patients with SS phenotype. The group of patients was divided into two subgroups according to the threshold point of %HbF which is 15%. Genotyping of rs11886868 and rs4671393 was performed using PCR/Sequencing. To test for trait association with the candidate SNPs, genotype and allele frequencies between 'group who had %HbF < 15' and 'group who had %HbF >15' (controls) were compared using Pearson's chi-square test (compare 2, version 1.02). The association of each genotype and the combined genotype with complications was performed by logistic regression test. RESULTS Our findings showed that the majority of patients carried genotype CT of rs11886868 and genotypes AG and GG of rs4671393 present HbF level < 15%. RR = 0.08, RR = 0.176, and RR = 0.189, respectively. The results showed a significant association between the alleles T of rs11886868 and G of rs4671393 and %HbF < 15% with P = 0.016; RR = 0.39 and P = 8.9 × 10-3: RR = 0.567, respectively. Interestingly, the C allele of the rs11886868 and the A allele of the rs46713939 were associated with an ameliorated phenotype in patient's SCA. The combination of the genotypes GG and CT explains more phenotypic variance than the sum of the two BCL11A SNPs taken individually.
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Affiliation(s)
- Leila Chaouch
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunisia
| | - Imen Moumni
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunisia
| | - Houyem Ouragini
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunisia
| | - Imen Darragi
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunisia
| | - Miniar Kalai
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunisia
| | - Dorra Chaouachi
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunisia
| | - Imen Boudrigua
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunisia
| | - Raouf Hafsia
- b Université de Tunis El Manar, Hopital Aziza Othmena, d'Hématologie Clinique , Tunisia
| | - Salem Abbes
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunisia
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Chaouch L, Moumni I, Ouragini H, Darragi I, Kalai M, Chaouachi D, Boudrigua I, Hafsia R, Abbes S. rs11886868 and rs4671393 of BCL11A associated with HbF level variation and modulate clinical events among sickle cell anemia patients. ACTA ACUST UNITED AC 2016; 21:425-9. [PMID: 27077760 DOI: 10.1080/10245332.2015.1107275] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
AIMS Fetal hemoglobin (HbF) modulates the phenotype of sickle cell anemia (SCA) by inhibiting deoxy sickle hemoglobin (HbS) polymerization. HbF genes are genetically regulated, and the level of HbF and its distribution among sickle erythrocytes is highly variable. Herein, we aimed to determine whether two functional polymorphisms of BCL11A are implicated in the variation of HbF and clinical events in SCA Tunisian patients. MATERIAL AND METHODS The studied population consisted of 148 SCA patients with SS phenotype. The group of patients was divided into two subgroups according to the threshold point of %HbF which is 15%. Genotyping of rs11886868 and rs4671393 was performed using PCR/Sequencing. To test for trait association with the candidate SNPs, genotype and allele frequencies between 'group who had %HbF < 15' and 'group who had %HbF >15' (controls) were compared using Pearson's chi-square test (compare 2, version 1.02). The association of each genotype and the combined genotype with complications was performed by logistic regression test. RESULTS Our findings showed that the majority of patients carried genotype CT of rs11886868 and genotypes AG and GG of rs4671393 present HbF level < 15%. RR = 0.08, RR = 0.176, and RR = 0.189, respectively. The results showed a significant association between the alleles T of rs11886868 and G of rs4671393 and %HbF < 15% with P = 0.016; RR = 0.39 and P = 8.9 × 10(-3): RR = 0.567, respectively. Interestingly, the C allele of the rs11886868 and the A allele of the rs46713939 were associated with an ameliorated phenotype in patient's SCA. The combination of the genotypes GG and CT explains more phenotypic variance than the sum of the two BCL11A SNPs taken individually.
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Affiliation(s)
- Leila Chaouch
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunisia
| | - Imen Moumni
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunisia
| | - Houyem Ouragini
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunisia
| | - Imen Darragi
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunisia
| | - Miniar Kalai
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunisia
| | - Dorra Chaouachi
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunisia
| | - Imen Boudrigua
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunisia
| | - Raouf Hafsia
- b Université de Tunis El Manar, Hopital Aziza Othmena, d'Hématologie Clinique , Tunisia
| | - Salem Abbes
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunisia
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Chaouch L, Kalai1 M, Darragi I, Boudrigua I, Chaouachi D, Ammar SB, Mellouli F, Bjaoui M, Abbes S. Genetic link with cholelithiasis among pediatric SCA Tunisian patients: Examples of UGT1A1, SLCO1A2 and SLCO1B1. Hematology 2015; 21:121-5. [PMID: 26146896 DOI: 10.1179/1607845415y.0000000030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
AIMS AND BACKGROUND Hyperbilirubinemia is often observed in chronic hemolysis and results in the formation of pigment cholelithiasis that could be increased by the presence of defected enzymes involved in the bilirubin metabolism. Indeed, this is the first report that interested in the study of polymorphisms in genes encoded for enzymes involved in the bilirubin metabolism: rs 4149056 of SLCO1B1 and rs4149000 of SLCO1A2 in combination with rs8175347 and rs887829 of UGT1A1 in order to find a correlation between the polymorphisms studied and the presence of gallstones in a population of sickle cell anemia (SCA) pediatric Tunisians. MATERIAL AND METHODS Our study involved 102 unrelated Tunisian subjects. All SCA patients are children (less than 16 years old) and were characterized by hyperbilirubinemia and 52 of them have cholelithiasis. The polymorphisms of the candidate genes were analyzed for all subjects by PCR/sequencing. Genotype and allele frequencies between cases and controls were compared using Pearson's chi-square test with a significance threshold of P < 0.05 (compare 2, version 1.02). RESULTS The novelty of this report is that children carrying the combined genotype of the rs studied: (TA7TA7)/TT/TC/GA have a higher risk to develop gallstones (P = 0.0027, RR = 18.27 (20.0061-915.28)). CONCLUSION Altogether our data provide the implication of UGT1A1 and SLCO1A2 in sickle cell anemia-related cholelithiasis.
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Affiliation(s)
- Leila Chaouch
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisie
| | - Miniar Kalai1
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisie
| | - Imen Darragi
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisie
| | - Imen Boudrigua
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisie
| | - Dorra Chaouachi
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisie
| | - Slim Ben Ammar
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisie
| | - F Mellouli
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisie
| | - M Bjaoui
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisie
| | - Salem Abbes
- a Université de Tunis El Manar, Institut Pasteur de Tunis, Laboratoire d'Hématologie Moléculaire et Cellulaire , Tunis , Tunisie
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