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1.
Heliyon ; 7(11): e08347, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-34816041

RESUMO

Understanding the structure of dog population and the evaluation of the accessibility of dogs to vaccination is essential to succeed in the fight against dog rabies and to adapt the strategy of its control. We studied the characteristics of the unowned and owned dogs using the beck method during a rabies vaccination campaign in randomly selected sectors (urban and rural sites) in the North West of Tunisia. During a door-to-door investigation of households, data on owned dogs were collected to describe the owned population dog. A photographic-recapture method was used to characterize and estimate the size of the unowned dogs. A total of 1432 households accounting for 5403 inhabitants were interviewed during the survey (1298 (90.6%) in the urban site and 134 (9.3%) in the rural site). The dog-owning households were significantly higher in the rural site (76.1% (102/134)) compared to the urban site (17.8% (231/1298)) (P < 0.000000). Of the 17.8% dog-owning households in urban site, 58.4% owned one dog and 9% between 4 and 8 dogs. While, of the 76.1% dog-owning households in rural site, 24.5% owned one dog and 32.3% owned between 4 and 10 dogs. The dog: human ratio was 1:11 in the urban site and 1:1.6 in the rural site. The dog population density was estimated at 16 dogs/km2 and 4 dogs/km2 in the urban and rural sites, respectively. The confinement practices varied significantly among the urban and rural sites (P < 0.000000). The percentage of free-roaming owned dogs was 51.1% in the rural site and 31.4% in the urban site. More than 60.0% of the owned dogs in the urban site were confined. The majority of dogs in the rural site were born in the house, although, a high percentage (56.7%) of owned dogs in the urban site was adopted from neighbours, others sectors, or countries. The vaccination coverage findings indicated that 77.8% and 84.2% of the owned dog were vaccinated in the urban and rural sites, respectively. The estimated size of the free-roaming dogs was 72 dogs in the urban site (Kalaat Senan) and 16 dogs in the rural site (Sod el Khir).

2.
BMC Med Genet ; 21(1): 111, 2020 05 24.
Artigo em Inglês | MEDLINE | ID: mdl-32448126

RESUMO

BACKGROUND: Mucopolysaccharidosis type II (MPS II) or Hunter syndrome is an X-linked recessive lysosomal storage disorder resulting from deficient activity of iduronate 2-sulfatase (IDS) and the progressive lysosomal accumulation of sulfated glycosaminoglycans (GAGs). METHODS: A diagnosis of MPS II or Hunter syndrome was performed based on the following approach after a clinical and paraclinical suspicion. Two biochemical and molecular tests were carried out separately and according to the availability of the biological material. RESULTS: All patients in this cohort presented the most common MPS II clinical features. Electrophoresis of GAGs on a cellulose acetate plate in the presence of a high concentration of heparane sulfate showed an abnormal dermatan sulfate band in the patients compared with that in a control case. Furthermore, leukocyte IDS activity ranged from 0.00 to 0.75 nmol/h/mg of leukocyte protein in patients. Five previously reported mutations were identified in this study patients: one splice site mutation, c.240 + 1G > A; two missense mutations, p.R88P and p.G94D; a large deletion of exon 1 to exon 7; and one nonsense mutation, p.Q396*. In addition, two novel alterations were identified in the MPS II patients: one frame shift mutation, p.D450Nfs*95 and one nonsense mutation, p.Q204*. Additionally, five known IDS polymorphisms were identified in the patients: c.419-16 delT, c.641C > T (p.T214M), c.438 C > T (p.T146T), c.709-87G > A, and c.1006 + 38 T > C. CONCLUSIONS: The high level of urine GAGs and the deficiency of iduronate 2-sulfatase activity was associated with the phenotype expression of Hunter syndrome. Molecular testing was useful for the patients' phenotypic classification and the detection of carriers.


Assuntos
Estudos de Associação Genética , Predisposição Genética para Doença , Glicoproteínas/genética , Mucopolissacaridose II/diagnóstico , Mucopolissacaridose II/genética , Mutação , Adolescente , Adulto , Criança , Pré-Escolar , Análise Mutacional de DNA , Ativação Enzimática , Feminino , Estudos de Associação Genética/métodos , Glicosaminoglicanos/metabolismo , Glicosaminoglicanos/urina , Humanos , Lactente , Masculino , Mucopolissacaridose II/epidemiologia , Mucopolissacaridose II/metabolismo , Fenótipo , Tunísia/epidemiologia , Adulto Jovem
3.
Br J Biomed Sci ; 77(2): 64-68, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-31679469

RESUMO

Background: Recurrent pregnancy loss is a serious complication of pregnancy and failure of the innate immune system, one part of which are toll-like receptors (TLRs). We hypothesised links between variants of TLR-2 and TLR-4 with recurrent pregnancy loss.Subjects and methods: We recruited 335 women with recurrent pregnancy loss, defined as ≥3 consecutive spontaneous miscarriage of unknown aetiology, and 331 age-matched control women. TLR-2 rs1898830 and rs4696483 and TLR-4 rs2770150, rs1554973 and rs7856729 genotyping were performed by allelic exclusion method (real-time PCR).Result: Of the five tested TLR-2 and TLR-4 tag-SNPs, minor allele frequency of TLR-2 rs1898830 was significantly more frequent in recurrent pregnancy loss patients than in controls. Significantly higher frequencies of homozygous (2/2) TLR-2 rs1898830 (14.1% vs. 8.9%) genotype carriers were seen between recurrent pregnancy loss cases and control women. Haploview analysis identified 1-locus TLR-2 haplotype (GC) that was positively associated with recurrent pregnancy loss. No TLR-4 haplotypes associated with altered recurrent pregnancy loss risk were identified.Conclusion: These findings confirm positive associations of TLR-2 rs1898830 with recurrent pregnancy loss, further supporting a role for TLR signalling in defining pregnancy outcome.


Assuntos
Aborto Habitual/genética , Receptor 2 Toll-Like/genética , Receptor 4 Toll-Like/genética , Adulto , Estudos de Casos e Controles , Feminino , Predisposição Genética para Doença , Humanos , Polimorfismo de Nucleotídeo Único , Gravidez
4.
Curr Res Transl Med ; 66(4): 95-101, 2018 11.
Artigo em Inglês | MEDLINE | ID: mdl-30274738

RESUMO

PURPOSE OF THE STUDY: No studies have compared the risk of mortality or graft-versus-host disease, in an inpatient setting in France, in allogeneic hematopoietic cell transplant recipients who develop cytomegalovirus disease with those who do not. This study assessed the impact of cytomegalovirus disease on clinical outcomes and healthcare resource utilization in allogeneic hematopoietic cell transplant recipients using the French Programme de Médicalisation des Systèmes d'Information database. PATIENTS AND METHODS: Recipients who had undergone allogeneic hematopoietic cell transplant in French hospitals between 2008 and 2011 were included in this retrospective, matched cohort study. Those with cytomegalovirus disease were each matched with two allogeneic hematopoietic cell transplant recipients without cytomegalovirus disease according to demographic and clinical characteristics. Probabilities of in-hospital mortality, graft rejection and/or graft-versus-host disease, and healthcare resource utilization were compared up to 12 months after cytomegalovirus disease diagnosis. RESULTS: Overall, 4884 transplant recipients were enrolled, of which 194 had cytomegalovirus disease. Of these, 165 recipients with cytomegalovirus disease were matched to 330 without cytomegalovirus disease (1:2 ratio). The development of cytomegalovirus disease was associated with a significantly higher risk of in-hospital mortality (relative risk = 1.7, p = 0.0005) and higher cumulative number of inpatient days (p < 0.0001), but was not associated with a significantly higher risk of graft rejection and/or graft-versus-host disease or healthcare costs. CONCLUSIONS: Due to the increased risk of in-hospital mortality and higher cumulative number of inpatient days in allogeneic hematopoietic cell transplant recipients with cytomegalovirus disease versus those without, new strategies to prevent and manage cytomegalovirus disease are warranted.


Assuntos
Infecções por Citomegalovirus/epidemiologia , Transplante de Células-Tronco Hematopoéticas/estatística & dados numéricos , Transplantados/estatística & dados numéricos , Estudos de Casos e Controles , Estudos de Coortes , Feminino , França/epidemiologia , Rejeição de Enxerto/epidemiologia , Doença Enxerto-Hospedeiro , Mortalidade Hospitalar , Humanos , Incidência , Masculino , Estudos Retrospectivos , Transplante Homólogo/estatística & dados numéricos
5.
Gene ; 651: 44-48, 2018 Apr 20.
Artigo em Inglês | MEDLINE | ID: mdl-29408271

RESUMO

Maturity Onset Diabetes of the Young (MODY) is a monogenic form of diabetes characterized by autosomal dominant inheritance, an early clinical onset and a primary defect in ß-cell function. Mutations in the GCK and HNF1A genes are the most common cause of MODY among Caucasians. The etiology of MODY in Tunisia stills a challenge for researchers. The aim of this study was to screen for mutations in GCK, HNF1A, HNF4A and INS genes in North African Tunisians subjects, in whom the clinical profile was very suggestive of MODY. A total of 23 unrelated patients, with clinical presentation of MODY were tested for mutations in GCK, HNF1A, HNF4A and INS genes, using Denaturing High Performance Liquid Chromatography (DHPLC), Multiplex Ligation-depend Probe Amplification (MLPA) and sequencing analysis. We identified the previously reported mutation c-169C > T in one patient as well as a new mutation c-457C > T in two unrelated patients. No mutations were detected in the HNF1A and INS genes. Despite restrictive clinical criteria used for selecting patients in this study, the most common genes known for MODY do not explain the majority of cases in Tunisians. This suggests that there are others candidate or unidentified genes contributing to the etiology of MODY in Tunisians families.


Assuntos
Diabetes Mellitus Tipo 2/genética , Glucoquinase/genética , Fator 1-alfa Nuclear de Hepatócito/genética , Mutação , Adulto , Feminino , Frequência do Gene , Quinases do Centro Germinativo , Fator 4 Nuclear de Hepatócito/genética , Humanos , Masculino , Polimorfismo Genético , Regiões Promotoras Genéticas , Proteínas Serina-Treonina Quinases , Tunísia , Adulto Jovem
7.
Int J Sports Med ; 33(11): 886-91, 2012 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-22791622

RESUMO

The study investigated if markers of muscle injury and antioxidant status were affected by a Wingate test performed at 2 different times of day. 15 young male footballers performed 2 tests (randomized) at 07:00-h and 17:00-h. Fasting blood samples were collected before and 3 min after each test for assessment of markers of muscle injury and antioxidant status. Resting oral temperature was recorded during each session. Peak power (10.76 ± 1.05 vs. 11.15 ± 0.83 W.kg( - 1)) and fatigue index (0.41 ± 0.04 vs. 0.49 ± 0.13%) during the Wingate test, and core temperature, were significantly higher (all p<0.05) in the evening. Markers of muscle injury were significantly higher in the evening before and after exercise (e. g., 148.7 ± 67.05 vs. 195 ± 74.6 and 191.6 ± 79.52 vs. 263.6 ± 96.06 IU.L (- 1), respectively, for creatine kinase; both p<0.001). Antioxidant parameters increased after the Wingate test but only resting values were significantly higher in the morning (e. g., 1.33 ± 0.19 vs. 1.19 ± 0.14 µmol.L (- 1) for total antioxidant status; p<0.05). The results indicate that muscle injury and antioxidant activity after the Wingate test were higher in the evening, suggesting a possible link between the biochemical measures and the diurnal fluctuation of anaerobic performance. However, repetition of this study after prescribed rather than self-selected exercise intensity is recommended.


Assuntos
Antioxidantes/metabolismo , Ciclismo/fisiologia , Ritmo Circadiano/fisiologia , Músculo Esquelético/lesões , Adolescente , Atletas , Desempenho Atlético/fisiologia , Biomarcadores/metabolismo , Temperatura Corporal , Teste de Esforço , Humanos , Masculino , Fadiga Muscular/fisiologia , Músculo Esquelético/fisiologia , Futebol , Fatores de Tempo
8.
Pathol Biol (Paris) ; 60(3): 190-2, 2012 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-22078177

RESUMO

UNLABELLED: Mucopolysaccharidosis type IVA or Morquio A disease is an autosomal recessive disease resulting from a deficiency of the lysosomal enzyme N-acetylgalactosamine-6-sulfate-sulfatase, which hydrolyses N-acetylgalactosamine-6-sulfate and galactose-6-sulfate in glycosaminoglycans. Phenotypes in Morquio A disease vary from the classical form with severe bone dysplasia, heart valve involvement, corneal opacity, short trunk dwarfism and a life span of 20 to 30 years, to attenuated forms with normal life span, mild bone involvement and mild visceral organ involvement. Unlike the other forms of mucopolysaccharidoses, Morquio A disease is characterized by normal intelligence. AIM OF THE STUDY: The aims of this study were to determine if the novel GALNS anomalies IVS1+1G-A and G66R identified in Tunisia are mutations or polymorphisms. PATIENTS AND METHODS: This study was carried out on six Morquio A patients recruited from many regions of Tunisia. We have used SCCP, sequencing and enzymatic digestion. RESULTS: IVS1+1G-A and G66R were two deleterious mutations and not polymorphisms. CONCLUSION: Screening of mutations and polymorphisms in GALNS gene provide useful information on genotype/phenotype correlations. It should also facilitate more accurate genetic counselling of newly diagnosed cases and their family members.


Assuntos
Condroitina Sulfatases/genética , Mucopolissacaridose IV/genética , Polimorfismo Genético , Adulto , Sequência de Bases , Análise Mutacional de DNA , Estudos de Associação Genética , Humanos , Dados de Sequência Molecular , Mucopolissacaridose IV/epidemiologia , Mutação/fisiologia , Polimorfismo Conformacional de Fita Simples/fisiologia , Sítios de Splice de RNA/genética , Tunísia/epidemiologia , Estudos de Validação como Assunto , Adulto Jovem
9.
Ann Cardiol Angeiol (Paris) ; 60(3): 135-40, 2011 Jun.
Artigo em Francês | MEDLINE | ID: mdl-21277558

RESUMO

BACKGROUND: The acute coronary syndromes (ACS) are classified among the major causes of mortality in the industrialized countries. The increased angiotensin I converting enzyme (ACEI) activity related to a genetic polymorphism constitutes a hereditary predisposition to these syndromes. AIM: Evaluate the ACEI activity in Tunisian patients with coronary heart disease, and investigate the association between this activity and an intronic deletion of 287 pb on the intron 16 of the ACEI gene. PATIENTS AND METHODS: Seventy-two coronary patients and 34 control subjects are recruited for our study. ACEI activity was measured by kinetic method. The intronic deletion was identified by PCR technique. RESULTS: An increased activity of ACEI was observed in patients compared with control subjects (84.38 ± 33.83 UI/L vs 59.06 ± 18.2 UI/L, P=10(-5)). The molecular study showed a raised relative frequency of D/D genotype (51.4%) among patients, whereas among the witnesses, I/I genotype prevailed (62%). D/D genotype is always associated with highest ACEI activity for the patients and the control subjects. CONCLUSION: The molecular studies and the biochemical investigations of the various parameters of cardiovascular risk (including the ACEI) direct towards a better treatment.


Assuntos
Síndrome Coronariana Aguda/genética , Angiotensinas/genética , Genótipo , Íntrons/genética , Polimorfismo Genético/genética , Síndrome Coronariana Aguda/diagnóstico , Adulto , Idoso , Feminino , Predisposição Genética para Doença , Humanos , Masculino , Pessoa de Meia-Idade , Valores de Referência , Fatores de Risco , Tunísia
10.
Ann Biol Clin (Paris) ; 66(2): 151-6, 2008.
Artigo em Francês | MEDLINE | ID: mdl-18390425

RESUMO

INTRODUCTION: cardiovascular diseases constitute the most hefty complications in diabetes. Absolute cardiovascular risk (ACVR) can be estimated by many equations that are continuously criticised. The aim is, in one hand, to evaluate ACVR in type 2 diabetes and, in the other hand, is to establish correlations between ACVR and oxidant-antioxidant status. MATERIAL AND METHODS: 183 type 2 diabetes and 200 controls were admitted. ACVR assessment was calculated following Laurier equation. Oxidant status was evaluated by the measure of homocysteine, hydrogen peroxide (H2O2) and LDL thiobarbituric reactive oxygen substances (LDL-TBARS). Antioxidant status was evaluated by the measure of superoxide dismutase (SOD) activity, glutathione peroxidase (GPx), total antioxidant status (TAS) vitamins A, E and zinc. Glycated haemoglobin (HbA1c) and microalbuminuria were assessed by turbidimetry. RESULTS: ninety percent of diabetes belonged to moderate and high ACVR groups. In diabetic men ACVR was doubled each elevation of 4 micromol/L homocysteine, of 50 micromol/L of H2O2 and of 20 mg/L of microalbuminuria. High risk ACVR group showed the lowest SOD activity, zincemia and the highest HbA1c. No significant difference was found in LDL-TBARS, TAS, GPx, vitamins A, E between the different ACVR groups. The strong relation between homocysteine and ACVR confirms homocysteine atherosclerotic role. Homocysteine auto-oxidation produces H2O2 leading to LDL-TBARS increase. Microalbuminuria-ACVR association verifies its vasculopathy predictor role. Urinary albumin leakage may be consequent to the hyperhomocysteinemia found in diabetes. CONCLUSION: homocysteine introduction in ACVR assessment equation may ameliorate this estimation.


Assuntos
Doenças Cardiovasculares/epidemiologia , Diabetes Mellitus Tipo 2/complicações , Estresse Oxidativo , Adulto , Fatores Etários , Idoso , Albuminúria/diagnóstico , Estudos de Casos e Controles , Interpretação Estatística de Dados , Diabetes Mellitus Tipo 2/tratamento farmacológico , Diabetes Mellitus Tipo 2/metabolismo , Feminino , Homocisteína/sangue , Humanos , Hipoglicemiantes/uso terapêutico , Masculino , Menopausa , Pessoa de Meia-Idade , Fatores de Risco , Fatores Sexuais , Fumar/efeitos adversos , Tunísia
11.
Pathol Biol (Paris) ; 56(2): 88-93, 2008 Mar.
Artigo em Francês | MEDLINE | ID: mdl-18178337

RESUMO

Gaucher disease is one of the most prevalent lysosomal disorders. In this present study, we report a diagnostic strategy of type 1 Gaucher disease. The application of combined methods in molecular biology allowed us to analyse the p.Asn 370 Ser mutation. The affected individual activity is very low. First, we have to used the enzymatic digestion method. Then, we have to identified the mutation by the refractory mutation system technique using specific primers for the p.Asn 370 Ser mutation. These analyses are supplemented by the direct sequencing in order to seek and confirm this mutation. Finally, the absence of the 55 pb deletion in exon 9 among corroborated the presence of the homozygous genotype of this p.Asn 370 Ser in the patient DNA.


Assuntos
Substituição de Aminoácidos , Doença de Gaucher/diagnóstico , Doença de Gaucher/genética , Glucosilceramidase/genética , Mutação , Asparagina , DNA/genética , Primers do DNA , Diagnóstico Diferencial , Éxons , Humanos , Reação em Cadeia da Polimerase , Mapeamento por Restrição , Serina
12.
Ann Biol Clin (Paris) ; 65(6): 647-52, 2007.
Artigo em Francês | MEDLINE | ID: mdl-18039610

RESUMO

Our study was carried out at a family from the Sahel (Tunisia). The father (index case) and his two children (son and daughter). The father beta-glucocerebrosidase (GCB) activity showing a deficit. These biochemical analyses are supplemented by molecular studies: enzymatic digestion and the direct sequencing. Two mutations were analysed, the p.Asn 370 Ser and the p.Leu 444 Pro. The DNA sequencing confirmed the presence of the homozygous genotype of this p.Asn 370 Ser in the father DNA and the heterozygous one in the two children DNA. It has no detection of the 55 pb deletion in exon 9 among all the specimens of DNA treated. The mutation p.Asn 370 Ser is associated with Gaucher disease type 1 correlated of a total absence of neurological involvements.


Assuntos
Doença de Gaucher/diagnóstico , Doença de Gaucher/genética , Glucosilceramidase/genética , Deleção de Sequência , Adolescente , Adulto , Substituição de Aminoácidos , Éxons , Feminino , Glucosilceramidase/deficiência , Humanos , Masculino , Pessoa de Meia-Idade , Núcleo Familiar , Tunísia
13.
Arch Pediatr ; 14(10): 1183-9, 2007 Oct.
Artigo em Francês | MEDLINE | ID: mdl-17728118

RESUMO

UNLABELLED: Mucopolysaccharidosis type I (MPS I) is a lysosomal disease due to mutations in the gene encoding alpha-l-iduronidase (IDUA) leading to variable clinical phenotypes with progressive severe organomegaly, bone and neurological involvement in the most severe forms. The aim of our study was to propose in Tunisia a strategy of molecular and prenatal diagnosis of the MPS I. POPULATION AND METHODS: Our study was carried out on 8 MPS I patients recruited from different Tunisian regions and issued from 5 unrelated families. All the patients were offspring of consanguineous marriages. RESULTS: The clinical and biological study led to diagnose 5 Hurler patients and 3 Hurler-Scheie patients. Three IDUA mutations were identified by molecular analysis within 6 different families: a novel mutation p.F602X and 2 already described mutations p.P533R and p.R628X. DISCUSSION: MPS I is a heterogeneous disease characterized by variability of the phenotypes. The missense mutation p.P533R associated with the intermediate phenotype was the most frequent in the Tunisian but also in the Moroccan population. In Tunisia, the incidence of p.P533R mutation seems to be associated with the high frequency of consanguineous marriages. CONCLUSION: The identification of known MPS I mutations (p.P533R and p.R628X) and of the novel mutation p.F602X permits reliable genetic counselling of at-risk relatives and molecular prenatal diagnosis.


Assuntos
Iduronidase/genética , Mucopolissacaridose I/genética , Criança , Pré-Escolar , Consanguinidade , Feminino , Humanos , Lactente , Masculino , Mutação , Tunísia
14.
Ann Biol Clin (Paris) ; 65(2): 175-9, 2007.
Artigo em Francês | MEDLINE | ID: mdl-17353172

RESUMO

A Tunisian patient affected by mucopolysaccharidosis (MPS) was investigated for a biological analysis (quantitative and qualitative glycosaminoglycans (GAG) screening). We have also done an enzymatic determination of alpha-L-iduronidase activity (IDUA). The most common mutation (p.Gln 70 X, p.Trp 402X and p.Pro 533 Arg) were researched by an enzymatic restriction and sequencing of the IDUA gene. Enzymatic and urinary diagnostics suggested a MPS I phenotype. The patient investigated had the mutation p.Pro 533 Arg in the homozygous status, whereas his parents were heterozygous for this mutation.


Assuntos
Mucopolissacaridose I/diagnóstico , Criança , Humanos , Masculino , Mucopolissacaridose I/genética , Tunísia
15.
Ann Biol Clin (Paris) ; 65(1): 5-11, 2007.
Artigo em Francês | MEDLINE | ID: mdl-17264033

RESUMO

Mucopolysaccharidosis IVA (MPS IVA; Morquio A disease) is an autosomal recessive lysosomal storage disorder caused by a genetic deficiency of the N-acetylgalactosamine-6-sulfate sulfatase (GALNS; E.C.3.1.6.4). GALNS is required to degrade keratan sulfate (KS) and chondroitine-6-sulfate (C6S). The accumulation of undegraded substrates in lysosomes of the affected tissues leads to a systemic bone dysplasia. Total urine glycosaminoglycans (GAG) in patients with MPS IVA are close to the normal range so it is difficult to distinguish this disease based on urine GAG excretion. Another potential disease marker could be KS levels in urine and plasma. Although the enzymatic diagnosis of affected patients with MPS IVA can be made, the detection of obligate heterozygotes by enzymatic measurement is less reliable because of a marked overlap of GALNS in fibroblasts or leucocytes from affected phenotype and normal controls. The genetic heterozygoty of MPS IVA has been facilitated by the isolation and characterization of the full lengh cDNA encoding human GALNS. Conventional therapy is symptomatic and limited to palliative procedures, which have virtually no impact upon mortality. To date, there is still no general consensus about the effectiveness of bone marrow transplantation. In the future, gene therapy could represent a great therapeutic improvement.


Assuntos
Mucopolissacaridose IV/diagnóstico , Mucopolissacaridose IV/terapia , Condroitina Sulfatases/genética , Feminino , Glicosaminoglicanos/urina , Humanos , Sulfato de Queratano/sangue , Sulfato de Queratano/urina , Mucopolissacaridose IV/genética , Reação em Cadeia da Polimerase , Gravidez , Diagnóstico Pré-Natal
16.
Ann Biol Clin (Paris) ; 65(1): 59-63, 2007.
Artigo em Francês | MEDLINE | ID: mdl-17264040

RESUMO

Mucopolysaccharidosis type IV A (MPS IV A) is an autosomal recessive disorder resulting from the deficient activity of the lysosomal enzyme, N-acetylgalactosamine-6-sulfate sulfatase (GALNS) and the progressive lysosomal accumulation of keratane sulfate. Clinically, the MPS IV A differs from the other MPS by the localisation of the keratane sulfate in skelet and in eyes associated to the conservation of a normal intelligence. To date, the characterization and purification of the GALNS gene made a research for pathogenic mutations in patients with MPS IV A easier. These mutations are responsible of severe, intermediate or mild phenotype. The aim for this work was the research of clinical, biologic and molecular characteristics of two Tunisian MPS IV A patients who were offsprings of consanguineous mating. Enzymatic and urinary diagnostics suggested a MPS IV A phenotype. A novel homozygous mutation IVS1+1G-A was identified by direct sequencing in the GALNS gene of the two patients. Identification of GALNS mutations provide genotype/phenotype correlations and permit the precision of anomalies responsible of Morquio A phenotype in concerned families.


Assuntos
Condroitina Sulfatases/genética , Mucopolissacaridoses/genética , Adolescente , Consanguinidade , Feminino , Genótipo , Humanos , Masculino , Mutação , Fenótipo , Análise de Sequência de DNA , Irmãos , Tunísia
17.
Mol Genet Metab ; 87(3): 213-8, 2006 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-16378744

RESUMO

Mucopolysaccharidosis type IVA (MPS IVA; OMIM #253000) or Morquio A syndrome is an autosomal recessive inborn error resulting from the deficient activity of the lysosomal enzyme, N-acetylgalactosamine-6-sulfatase (GALNS), and the progressive lysosomal accumulation of sulfated glycosaminoglycans. Clinically, the severe form of this lysosomal storage disease is characterized by a characteristic severe bone dysplasia and normal intelligence. To date, a variety of mutations have been associated with the severe MPS IVA phenotype. Here, we report the GALNS mutations in six severe MPS IVA patients from four unrelated Tunisian families. For mutation detection, each of the 14 exons and adjacent intron-exon junctions of the GALNS gene were sequenced after PCR-amplification from genomic DNA. Two novel mutations were identified: a G to A transition in the conserved 5' donor splice site of intron 1 (GACgt-->GACat: designated IVS1(+1g-->a)) and a G to C transversion in codon 66 of exon 2 predicting a glycine to arginine substitution (G66R). The IVS1(+1g-->a) mutation was homozygous in five similarly affected patients from three presumably unrelated families, but haplotype analysis suggested a common ancestor. The affected patient in the fourth family was homozygous for the G66R mutation. These are the first GALNS mutations causing severe MPS IVA disease identified in Tunisia. These molecular findings provide genotype/phenotype correlations, and permit accurate carrier detection, prenatal diagnosis, and counseling for MPS IVA disease in Tunisia where first cousin consanguineous mating remains frequent.


Assuntos
Condroitina Sulfatases/genética , Mucopolissacaridose IV/enzimologia , Mucopolissacaridose IV/genética , Mutação/genética , Adolescente , Sequência de Aminoácidos , Criança , Pré-Escolar , Condroitina Sulfatases/química , Condroitina Sulfatases/metabolismo , Análise Mutacional de DNA , Feminino , Haplótipos/genética , Humanos , Lactente , Masculino , Dados de Sequência Molecular , Mucopolissacaridose IV/patologia , Linhagem , Fenótipo , Polimorfismo Genético , Homologia de Sequência de Aminoácidos , Tunísia
18.
J Inherit Metab Dis ; 28(6): 1019-26, 2005.
Artigo em Inglês | MEDLINE | ID: mdl-16435195

RESUMO

Mucopolysaccharidosis type I (MPS I) is a lysosomal storage disease resulting from the defective activity of the enzyme alpha-L-iduronidase (IDUA). The disease has severe and milder phenotypic subtypes. The IDUA mutations in five MPS I patients from three unrelated families from central and southern Tunisia were determined by amplifying and sequencing each of the IDUA exons and intron-exon junctions. Two novel IDUA mutations, c.1805delTinsGAACA in exon 13 and I270S in exon 7, and two previously reported mutations, P533R and R628X, were detected. The two patients in family 1 who had the Hurler phenotype were homoallelic for the novel deletion-insertion mutation. The patient in family 2 who also had the Hurler phenotype was heteroallelic for the novel missense mutation I270S and the previously reported nonsense mutation R628X. The two patients in family 3 who had the Hurler-Scheie phenotype were homoallelic for P533R. In addition, six known IDUA polymorphisms were identified. These are the first Tunisian MPS I patients to be genotyped. The identification of these mutations and their genotype-phenotype correlations should facilitate prenatal diagnosis and counselling for MPS I in Tunisia, where a very high rate of consanguinity exists.


Assuntos
Iduronidase/genética , Mucopolissacaridose I/diagnóstico , Mucopolissacaridose I/genética , Mutação , Alelos , Consanguinidade , Análise Mutacional de DNA , DNA Complementar/metabolismo , Éxons , Saúde da Família , Feminino , Deleção de Genes , Genótipo , Heterozigoto , Humanos , Íntrons , Leucócitos/metabolismo , Masculino , Mutação de Sentido Incorreto , Linhagem , Fenótipo , Tunísia
19.
Ann Biol Clin (Paris) ; 62(5): 555-62, 2004.
Artigo em Francês | MEDLINE | ID: mdl-15355805

RESUMO

BACKGROUND: Lipid and glycemic imbalances are frequent disorders found in diabetes type 2. These disorders are influenced by dietary means. AIM: to investigate saturated fatty acids (SFA), polyunsaturated fatty acids (PUFS) and oleic acid of cholesterol ester fraction in non-insulin dependant diabetes mellitus without cardiovascular complications (NIDDM), non-insulin dependant diabetes mellitus with cardiovascular complications (NIDDMc) and healthy controls. METHODS: The composition of cholesterol ester fatty acids in 35 NIDDM, 33 NIDDMc and 32 controls were measured by gas-chromatography. Glycaemia and lipid profile were measured using commercial kits. RESULTS: Compared to NIDDM and to controls, NIDDMc showed a significant increase of different SFA (C12:0, C14:0, C16:0, C18:0). Oleic acid (C18:1) was significantly decreased in NIDDMc and NIDDM compared to controls (15,88 +/- 2,34 and 22,66 +/- 4,14 vs 28,18 +/- 2,90). Linoleic acid (C18:2) was significantly increased in NIDDMc compared to NIDDM and controls (52,59 +/- 5,50 vs 49,29 +/- 8,58 and 39,26 +/- 10,46). Linolenic acid (C18:3) and arachidonic acid (C20:4) were significantly decreased in NIDDMc compared to NIDDM and to controls. Linoleic acid (C18:2) / linolenic acid (C18:3) ratio was increased in NIDDMc. CONCLUSION: Linoleic (C18:2) acid excess intake found in our NIDDMc could emphasize arachidonic synthesis which is directly transformed while an inflammatory syndrome observed in coronary pathologies.


Assuntos
Doenças Cardiovasculares/metabolismo , Ésteres do Colesterol/metabolismo , Diabetes Mellitus Tipo 2/metabolismo , Ácidos Graxos/metabolismo , Doenças Cardiovasculares/complicações , Diabetes Mellitus Tipo 2/complicações , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Tunísia
20.
Ann Biol Clin (Paris) ; 62(5): 578-82, 2004.
Artigo em Francês | MEDLINE | ID: mdl-15355809

RESUMO

Toxic epidermal necrolysis (TEN) is a rare drug-induced disease characterized by extensive epidermal destruction. We reported here a case of Lyell syndrome which happened few hours later after treatment associating lincomycine chlorhydrate with nonsteroidol anti-inflammatory drugs. The 28-year-old female patient developed many visceral complications with biochemical and haematological disorders. This syndrome is a dermatological emergency whose vital prognosis is displayed.


Assuntos
Síndrome de Stevens-Johnson , Adulto , Feminino , Humanos , Síndrome de Stevens-Johnson/diagnóstico , Síndrome de Stevens-Johnson/etiologia
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