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1.
Med Trop Sante Int ; 4(1)2024 Mar 31.
Artigo em Francês | MEDLINE | ID: mdl-38846113

RESUMO

Background: Sickle cell disease is one of the most common genetic diseases in France. In French Guiana, neonatal screening was introduced in 1992, at the same time as other screening programs for childhood diseases. The aim of this study is to describe the organization of newborn screening for sickle cell disease in French Guiana. Materials and methods: We used several data sources: data collected from hospital records since 2005, activity reports from the national neonatal screening program and data from screening campaigns organized by the Drepaguyane association between 2010 and 2021 on 1,300 subjects. Blood samples from newborns are collected by capillary or venous sampling and absorbed on blotting paper (Guthrie) at the same time as those for other neonatal screenings. The dried papers are sent to the inter-regional laboratory in Lille, for further processing. In Saint-Laurent-du-Maroni, in order to reduce the proportion of people lost to follow-up, a double screening is carried out and the results are returned before discharge from the maternity hospital. All data were entered into an anonymous Excel file. The data were analyzed using STATA software. Results: Among the 175,593 screened neonates between 1992 and 2021, screening detected 823 infants with sickle cell disease and 17,950 heterozygotes. Sickle cell genotypes include 493 SS (60%), 302 SC (37%) and 28 S-Beta-thalassemia (3%). The incidence of sickle cell disease was 1/213, 95% CI [1/236-1/204], and that of heterozygotes 1/10, IC 95% [1/12-1/8]. The majority of these children (52%) were from the Maroni region. The delay between screening and test results was 7 days. Only pathological results (homozygous, heterozygous) were communicated to parents and/or the attending physician by post. These data confirm the upward trend in the number of children screened for sickle cell disease in French Guiana. Data from screening campaigns organized by the Drepaguyane association have enabled to describe the distribution of the various abnormal hemoglobin fractions, and to confirm that HbS is more frequent in Western French Guiana. In Cayenne, in 2021, the active file comprised 699 patients, including 266 children under 18 years old. Discussion and conclusion: This study provides valuable data on 30 years of neonatal screening for sickle cell disease in French Guiana, and on the evolution of sickle cell disease patients. It confirms that French Guiana is the French territory with the highest incidence of sickle cell disease. This incidence continues to rise over time. The study reveals the improvement in the organization of sickle cell disease management in French Guiana between 1992, when screening was introduced, and the present day. It highlights the role of patient associations in the fight against this disease, by organizing awareness and screening campaigns. These data will be used to guide public health policies in the pursuit of improved care and primary prevention.


Assuntos
Anemia Falciforme , Triagem Neonatal , Humanos , Anemia Falciforme/epidemiologia , Anemia Falciforme/diagnóstico , Anemia Falciforme/genética , Guiana Francesa/epidemiologia , Triagem Neonatal/métodos , Recém-Nascido , Feminino , Fatores de Tempo
2.
J Med Life ; 17(1): 63-66, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38737665

RESUMO

Sickle cell disease (SCD) is the most common monogenic disorder, although the diversity and heterogenicity of clinical presentations render estimations of disease severity unpredictable. This cross-sectional study aimed to determine if laboratory markers could serve as indicators of SCD severity. We enrolled 90 adult patients with SCD with a mean age of 32.33 ± 11.84 years from the eastern province of Saudi Arabia, where SCD is more common than in other regions. Our study revealed a positive significant association between the number of hospitalizations and emergency visits with white blood cells (WBC) (R = 0.241, R = 0.207), respectively. Similarly, positive significant associations were found between the number of hospitalizations and emergency visits with platelets (R = 0.393, R = 0.276), respectively. Conversely, negative significant relationships were found between the number of hospitalizations and emergency visits (ER) with hemoglobin (Hb) F (R = -0.268, R = -0.263), respectively. Additionally, significant negative relationships were found between Hb F (R = -0.223) and the frequency of ICU admission. Only the number of hospitalizations and emergency visits annually were significantly predicted with P values of 0.021 and 0.038, respectively. Moreover, an increase in WBC was found to significantly increase the chance of undergoing splenectomy by 23.02%. SCD is a multisystemic disease with heterogeneous clinical presentations and disease severity. Inflammatory markers are valuable tools for better risk stratification and could be translated into developing new therapeutic strategies and modifying the treatment paradigm.


Assuntos
Anemia Falciforme , Índice de Gravidade de Doença , Humanos , Anemia Falciforme/sangue , Anemia Falciforme/epidemiologia , Anemia Falciforme/diagnóstico , Estudos Transversais , Adulto , Masculino , Feminino , Arábia Saudita/epidemiologia , Biomarcadores/sangue , Hospitalização/estatística & dados numéricos , Adulto Jovem , Pessoa de Meia-Idade , Serviço Hospitalar de Emergência/estatística & dados numéricos
3.
PLoS One ; 19(5): e0303520, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38768171

RESUMO

INTRODUCTION: Sickle cell disease (SCD) remains a public health problem especially in sub-Saharan Africa including Ghana. While pilot initiatives in Africa have demonstrated that neonatal screening coupled with early intervention reduces SCD-related morbidity and mortality, only 50-70% of screen-positive babies have been successfully retrieved to benefit from these interventions. Point-of-care testing (POCT) with high specificity and sensitivity for SCD screening can be integrated into existing immunization programs in Africa to improve retrieval rates. This study explored community acceptability of integrating POCT to screen for SCD in children under 5 years of age in primary healthcare facilities in Northern Ghana. METHOD: This was an exploratory study using qualitative research approach where 10 focus group discussions and 20 in-depth interviews were conducted with community members and health workers between April and June 2022. The recorded interviews were transcribed verbatim after repeatedly listening to the recordings. Data was coded into themes using QSR Nvivo 12 software before thematic analysis. RESULTS: Most participants (70.9%) described SCD as serious and potentially life-threatening condition affecting children in the area. Of 148 community members and health workers, 141 (95.2%) said the screening exercise could facilitate diagnosis of SCD in children for early management. However, discrimination, fear of being tested positive, stigmatization, negative health worker attitude linked with issues of maintaining confidentiality were reported by participants as key factors that could affect uptake of the SCD screening exercise. Most participants suggested that intensive health education (78.3%), positive attitude of health workers (69.5%), and screening health workers not being biased (58.8%) could promote community acceptability. CONCLUSION: A large majority of participants viewed screening of SCD in children as very important. However, opinions expressed by most participants suggest that health education and professionalism of health workers in keeping patients' information confidential could improve the uptake of the exercise.


Assuntos
Anemia Falciforme , Testes Imediatos , Atenção Primária à Saúde , Humanos , Anemia Falciforme/diagnóstico , Anemia Falciforme/psicologia , Gana , Feminino , Masculino , Pré-Escolar , Adulto , População Rural , Lactente , Aceitação pelo Paciente de Cuidados de Saúde , Pessoal de Saúde/psicologia , Programas de Rastreamento/métodos , Pessoa de Meia-Idade , Recém-Nascido , Adulto Jovem , Grupos Focais
4.
BMC Pediatr ; 24(1): 323, 2024 May 10.
Artigo em Inglês | MEDLINE | ID: mdl-38730340

RESUMO

BACKGROUND: Sickle cell disease (SCD), a noncommunicable disease, has the greatest burden in sub-Saharan Africa. The majority of children (50-90%) with SCD die before their 5th birthday, with approximately 150,000-300,000 annual SCD child deaths in Africa. In developed countries, newborn screening (NBS) has been shown to improve the survival of children with sickle cell disease, with under5 childhood mortality reduced tenfold due to interventions performed before the development of complications. Point -of-care tests have been developed for resource limited settings to expand NBS. The aim of this study was to determine the birth prevalence of sickle cell disease in Namibia using the HemoTypeSC™ point-of-care test. METHODS: A cross-sectional descriptive study was carried out at Rundu Intermediate Hospital in the Kavango East Region. Two hundred and two (202) well newborns within 72 h of birth were recruited for the study from 22 February to the 23th March 2023. Descriptive statistics were used to compute the haemoglobin types of the study participants. RESULTS: The majority of the participants (n = 105, 52%) were females, and (n = 97,48%) were males. The median age of the participants was 23 h (Q1, Q3; 11; 33),) with an age range of 2-98 h. Sickle cell trait was present in 9.4% of the screened newborns, no homozygous disease was detected, and 90.6% had Hb AA. CONCLUSIONS: This study is the first to measure HbS gene carriage at birth using HemotypeSC point-of-care testing in Namibia. There was a moderate prevalence of sickle cell traits but no SCD. This baseline study may provide the foundation for larger epidemiological surveys to map HbS gene carriage in Namibia to provide evidence for policy makers to fashion appropriate SCD newborn screening services.


Assuntos
Anemia Falciforme , Triagem Neonatal , Testes Imediatos , Humanos , Anemia Falciforme/epidemiologia , Anemia Falciforme/diagnóstico , Anemia Falciforme/genética , Recém-Nascido , Estudos Transversais , Namíbia/epidemiologia , Prevalência , Feminino , Masculino , Triagem Neonatal/métodos
5.
BMC Public Health ; 24(1): 1467, 2024 May 31.
Artigo em Inglês | MEDLINE | ID: mdl-38822327

RESUMO

BACKGROUND: Screening for sickle cell traits before marriage or producing children is one of the outstanding preventive measures for sickle cell disease (SCD).The disease is a collection of inherited blood disorders that impact millions globally, with a predominant 75% occurrence in the sub-Saharan region. With increasing burden of SCD on the continent amidst a cost effective prevention method, no study has systematically reviewed or presented meta-analytic uptake or practice of premarital sickle cell trait screening. METHODS: This review systematically explored the uptake or practice of premarital genotype screening in Africa. We searched PubMed and Scopus databases for African studies on premarital screening for sickle cell traits. RESULTS: Our results indicate that the pooled uptake of premarital sickle cell trait screening in Africa is 47.82% (95% CI: [46.53-49.11]; I2: 98.95% [98.74-99.13]). Our review observed, a significant relationship between the awareness of sickle cell disease and the uptake of genotype screening; F(1, 13) = 12.04, p = 0.004). The model explained approximately 48.08% of the variation in genotype screening (R² = 0.4808) and predicted a 0.729 increase in the likelihood of genotype screening uptake for every unit rise in sickle cell disease awareness (ß = 0.729, p = 0.004). Additionally, Pearson correlation (r = 0.6934) indicated a moderately strong positive correlation between the two variables. CONCLUSION: With over 75% of the global burden of sickle cell disease domiciled in Africa, the continent cannot overlook the cost of hemoglobinopathies. The uptake of sickle cell traits screening is suboptimal across the continent. To achieve the mandate of sustainable development goal number (3); to end preventable deaths of newborns and children under 5 years of age by 2030, there is need to intensify campaigns on premarital genetic screening through education and other health promotion tools.


Assuntos
Anemia Falciforme , Exames Pré-Nupciais , Traço Falciforme , Humanos , Traço Falciforme/diagnóstico , África , Anemia Falciforme/diagnóstico , Anemia Falciforme/genética , Programas de Rastreamento , Testes Genéticos
7.
BMC Pregnancy Childbirth ; 24(1): 321, 2024 Apr 26.
Artigo em Inglês | MEDLINE | ID: mdl-38671412

RESUMO

BACKGROUND: Pregnancy presents a critical period for any maternal and child health intervention that may impact the health of the newborn. With low antenatal care attendance by pregnant women in health facilities in Nigeria, community-based programs could enable increased reach for health education about sickle cell disease (SCD) and newborn screening (NBS) among pregnant women. This pilot study aimed to assess the effect of education on the knowledge about SCD and NBS among pregnant women using the Healthy Beginning Initiative, a community-based framework. METHODS: A pre-post study design was used to evaluate knowledge of SCD and NBS in a convenience sample of 89 consenting pregnant women from three communities. Participants were given surveys prior to and following completion of a health education session. McNemar's test was used to compare the proportion of participants with correct responses. The level of significance was taken as p < 0.05. RESULTS: Compared to pre-test values, post-test values showed that participants understood that SCD is hereditary (93.3% vs. 69.7%), both parents must have at least one gene for someone to have SCD (98.9% vs. 77.5) and blood test is the right way to know if one has SCD (98.8% vs. 78.7%). Also, a large proportion of participants (post-test ~ 89.9%; compared to pre-test ~ 23.6%) understood that the chance of conceiving a child with SCD was 25% for a couple with the sickle cell trait (SCT). Knowledge of the possibility of diagnosing SCD shortly after birth was highly increased in the post test phase of the study when compared to the pre-test phase (93.3% vs. 43.9%, respectively). Concerning the overall knowledge scores, those with high level of knowledge significantly increase from 12.6% pretest to 87.4% posttest (p = 0.015). CONCLUSION: The health education intervention was associated with significant improvement on almost all measures of SCD knowledge. Focused health education for pregnant women using community structures can improve knowledge of SCD and NBS.


Assuntos
Anemia Falciforme , Educação em Saúde , Conhecimentos, Atitudes e Prática em Saúde , Triagem Neonatal , Humanos , Feminino , Projetos Piloto , Anemia Falciforme/diagnóstico , Anemia Falciforme/genética , Triagem Neonatal/métodos , Gravidez , Adulto , Recém-Nascido , Nigéria , Educação em Saúde/métodos , Adulto Jovem , Cuidado Pré-Natal/métodos , Gestantes/psicologia , Gestantes/educação
8.
Biomedica ; 44(1): 102-107, 2024 03 31.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-38648350

RESUMO

Introduction. The first neonatal screening program in Colombia ­ PREGEN ­ was set up in the medical private sector of Bogotá in 1988. We report the results from recent years that, given the scarcity of similar information in our country, may help estimate the frequency of the evaluated neonatal disorders and which ones should be included in the neonatal screening programs in our country. Objective. To describe the results of PREGEN´s newborn screening program between 2006 and 2019. Materials and methods. We analyzed databases and other informative documents preserved in PREGEN from the 2006-2019 period. Results. One in every 164 newborns screened in our program had an abnormal hemoglobin variant, and one in every 194 carried some hemoglobin S variant. Glucose-6- phosphate dehydrogenase deficiency and congenital hypothyroidism are next as the more common disorders. Conclusions. Abnormal hemoglobin causes the most frequent monogenic disorder in the world. Glucose-6-phosphate dehydrogenase deficiency is the most common enzymopathy affecting nearly 400 million individuals worldwide. Since both disorders are more common in people of African descent and confer some resistance to malaria, we believe that screening for both disorders may be more relevant in the areas with African ancestry in our country.


Introducción. En Colombia, el primer programa de tamizaje neonatal, PREGEN, inició labores en el sector privado de Bogotá en 1988. En este artículo se presentan los resultados obtenidos en los últimos años, que, dada la carencia de estos estudios en el país, pueden servir para evaluar la frecuencia de aparición de los trastornos congénitos evaluados y estimar cuáles de ellos deben ser objeto de tamizaje neonatal a nivel nacional. Objetivos. Reportar los resultados del programa de tamizaje PREGEN entre el 2006 y el 2019. Materiales y métodos. Para este análisis se examinaron las bases de datos y otros documentos informativos de PREGEN para el periodo 2006-2019. Resultados. Uno de cada 164 recién nacidos tamizados en el programa PREGEN en Bogotá presentó una variante anormal de la hemoglobina y uno de cada 194 es portador de hemoglobina S. Los siguientes dos trastornos más frecuentes encontrados fueron la deficiencia de la enzima glucosa-6-fosfato deshidrogenasa (frecuencia 1:2.231) y el hipotiroidismo congénito (frecuencia 1:3.915). Conclusiones. Las hemoglobinopatías mostraron ser uno de los desórdenes monogénicos más comunes, seguidos por la deficiencia de glucosa-6-fosfato deshidrogenasa y el hipotiroidismo congénito. Se calcula que cerca de 400 millones de personas en el mundo están afectadas por la deficiencia de glucosa-6-fosfato deshidrogenasa, por lo cual es la enzimopatía más común en el mundo. Como ambos desórdenes son más frecuentes en poblaciones de origen africano y confieren algún grado de resistencia a la malaria, es de prever que su tamizaje debe ser de mayor importancia en las zonas con ancestros africanos en Colombia.


Assuntos
Deficiência de Glucosefosfato Desidrogenase , Triagem Neonatal , Colômbia/epidemiologia , Humanos , Recém-Nascido , Deficiência de Glucosefosfato Desidrogenase/diagnóstico , Deficiência de Glucosefosfato Desidrogenase/epidemiologia , Deficiência de Glucosefosfato Desidrogenase/genética , Setor Privado , Hipotireoidismo Congênito/diagnóstico , Hipotireoidismo Congênito/epidemiologia , Anemia Falciforme/diagnóstico , Anemia Falciforme/epidemiologia , Hemoglobinopatias/diagnóstico , Hemoglobinopatias/epidemiologia
9.
Andes Pediatr ; 95(1): 41-52, 2024 Feb.
Artigo em Espanhol | MEDLINE | ID: mdl-38587343

RESUMO

Sickle cell anemia (SCA) is the most common genetic disease worldwide. There are countries with massive public health programs for early detection of this condition. In the literature, several specific haplotypes or single-base polymorphic variants (SNPs) have been associated with the SCA prognosis. OBJECTIVE: To demonstrate the significant correlation of SNPs relevant to the diagnosis and prognosis of SCA among different ethnic groups. METHODOLOGY: we analyzed population frequencies and correlations of several SNPs related to the prognosis of SCA (i.e., baseline fetal hemoglobin levels), response to hydroxyurea treatment, and response to other drugs used in the SCA treatment, collected from validated genomic databases among different ethnic groups. RESULTS: The calculation of the Hardy-Weinberg equilibrium and the logistic regression was successful in classifying the ethnic groups as African (0 = 0.78, 1 = 0.89), and with a lower efficiency as American (AMR) (0 = 0.88, 1 = 0.00), East Asian (EAS) (0 = 0.80, 1 = 0.00), European (EUR) (0 = 0.79, 1 = 0.00), and South Asian (SAS) (0 = 0.80, 1 = 0.00). CONCLUSIONS: The results extend those from previous reports and show that the profile of most of the SNPs studied presented statistically significant distributions among general ethnic groups, pointing to the need to carry out massive early screening of relevant SNPs for SCA in patients diagnosed with this disease. It is concluded that the application of a broad mutation detection program will lead to a more personalized and efficient response in the treatment of SCA.


Assuntos
Anemia Falciforme , Medicina de Precisão , Humanos , Anemia Falciforme/diagnóstico , Anemia Falciforme/genética , Anemia Falciforme/terapia , Mutação , Etnicidade/genética , Prognóstico
11.
MMWR Morb Mortal Wkly Rep ; 73(12): 248-254, 2024 Mar 28.
Artigo em Inglês | MEDLINE | ID: mdl-38547025

RESUMO

Sickle cell disease (SCD) remains a public health priority in the United States because of its association with complex health needs, reduced life expectancy, lifelong disabilities, and high cost of care. A cross-sectional analysis was conducted to calculate the crude and race-specific birth prevalence for SCD using state newborn screening program records during 2016-2020 from 11 Sickle Cell Data Collection program states. The percentage distribution of birth mother residence within Social Vulnerability Index quartiles was derived. Among 3,305 newborns with confirmed SCD (including 57% with homozygous hemoglobin S or sickle ß-null thalassemia across 11 states, 90% of whom were Black or African American [Black], and 4% of whom were Hispanic or Latino), the crude SCD birth prevalence was 4.83 per 10,000 (one in every 2,070) live births and 28.54 per 10,000 (one in every 350) non-Hispanic Black newborns. Approximately two thirds (67%) of mothers of newborns with SCD lived in counties with high or very high levels of social vulnerability; most mothers lived in counties with high or very high levels of vulnerability for racial and ethnic minority status (89%) and housing type and transportation (64%) themes. These findings can guide public health, health care systems, and community program planning and implementation that address social determinants of health for infants with SCD. Implementation of tailored interventions, including increasing access to transportation, improving housing, and advancing equity in high vulnerability areas, could facilitate care and improve health outcomes for children with SCD.


Assuntos
Anemia Falciforme , Etnicidade , Feminino , Criança , Humanos , Recém-Nascido , Estados Unidos/epidemiologia , Prevalência , Estudos Transversais , Vulnerabilidade Social , Grupos Minoritários , Anemia Falciforme/epidemiologia , Anemia Falciforme/diagnóstico
13.
J Natl Med Assoc ; 116(2 Pt 1): 119-125, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38383222

RESUMO

Sickle cell disease (SCD) is an inherited hemoglobinopathy with protean clinical manifestations. The liver could be affected by various SCD-associated complications of an overlapping nature. The clinical presentations of "sickle cell hepatopathy" range from clinically asymptomatic patients to those with life-threatening complications. Herein we report an SCD patient who presented with right upper quadrant abdominal pain and jaundice, eventually diagnosed as a self-limited form of acute sickle cell hepatopathy with overlapping features of acute hepatic crisis and benign intrahepatic cholestasis. Using this patient as an illustration, we will review the spectrum of hepatobiliary presentations in the SCD population.


Assuntos
Anemia Falciforme , Colestase Intra-Hepática , Humanos , Anemia Falciforme/complicações , Anemia Falciforme/diagnóstico , Colestase Intra-Hepática/etiologia , Colestase Intra-Hepática/complicações , Dor Abdominal/etiologia
14.
Am J Hypertens ; 37(5): 358-365, 2024 Apr 15.
Artigo em Inglês | MEDLINE | ID: mdl-38323455

RESUMO

BACKGROUND: An important prevalence (32%-45%) of masked hypertension has been reported in children with sickle cell disease (SCD). Stroke screening is well established using transcranial Doppler (TCD) ultrasound. The objectives of our proof-of-concept study in childhood SCD were to evaluate the prevalence of hypertension and its relationships with cerebral vasculopathy (TCD velocity) and to further evaluate in a subgroup of children the correlations of cardiovascular autonomic nervous system indices with TCD velocity. METHODS: Ambulatory blood pressure measurement (ABPM) and TCD velocity were obtained in children with SCD and in a restricted sample, cardiac sympathovagal balance using heart rate variability analyses, baroreflex sensitivity, and pulse wave velocity were measured. RESULTS: In 41 children with SCD (median age 14.0 years, 19 girls, SS/Sß + thalassemia/SC: 33/2/6), ABPM results showed masked hypertension in 2/41 (5%, 95% confidence interval, 0-11) children, consistent with the prevalence in the general pediatric population, elevated blood pressure (BP) in 4/41 (10%) children, and a lack of a normal nocturnal dip in 19/41 children (46%). Children with increased TCD velocity had lower nocturnal dipping of systolic BP. In the 10 participants with extensive cardiovascular assessment, increased TCD velocity was associated with parasympathetic withdrawal and baroreflex failure. Exaggerated orthostatic pressor response or orthostatic hypertension was observed in 7/10 children that was linked to parasympathetic withdrawal. CONCLUSIONS: Autonomic nervous system dysfunction, namely loss of parasympathetic modulation, of SCD contributes to increase TCD velocity but is not associated with an increased prevalence of masked hypertension. CLINICAL TRIALS REGISTRATION: NCT04911049.


Assuntos
Anemia Falciforme , Hipertensão Mascarada , Acidente Vascular Cerebral , Adolescente , Criança , Feminino , Humanos , Anemia Falciforme/complicações , Anemia Falciforme/diagnóstico , Anemia Falciforme/epidemiologia , Monitorização Ambulatorial da Pressão Arterial , Hipertensão Mascarada/diagnóstico , Hipertensão Mascarada/epidemiologia , Hipertensão Mascarada/complicações , Prevalência , Análise de Onda de Pulso , Acidente Vascular Cerebral/prevenção & controle , Masculino
15.
Clin Chem Lab Med ; 62(6): 1149-1157, 2024 May 27.
Artigo em Inglês | MEDLINE | ID: mdl-38353144

RESUMO

OBJECTIVES: Newborn screening (NBS) for sickle cell disease (SCD) requires a robust, high-throughput method to detect hemoglobin S (HbS). Screening for SCD is performed by qualitative methods, such as isoelectric focusing (IEF), and both qualitative and quantitative methods such as high performance liquid chromatography (HPLC), capillary electrophoresis (CE), and tandem mass spectrometry (MS/MS). All these methods detect HbS, as well as low-level or absent HbA, and also other variants of hemoglobin. HPLC is considered as a reference method for NBS, because of its high sensitivity and specificity in detecting HbS. NeoSickle®, a fully automated matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) platform, combined with automated sample processing, a laboratory information management system and NeoSickle® software for automatic data interpretation, has increased the throughput of SCD testing. The purpose of this study was to compare the performances of NeoSickle® and HPLC. METHODS: A prospective study was conducted including 9,571 samples from the NBS program to compare MALDI-MS using NeoSickle® with an HPLC method. Correlation between the two methods was studied. For the MALDI-MS method, sensitivity, specificity, NPV, and PPV were calculated. RESULTS: We found over 99.4 % correlation between the HPLC and MALDI-MS results. NeoSickle® showed 100 % of sensitivity and specificity in detecting SCD syndrome, leading to positive and negative predictive values of 100 %. CONCLUSIONS: NeoSickle® is adapted to NBS for SCD, and can be used in first-line high-throughput screening to detect HbS, and beta-thalassemia major warning. When HbS is detected, second-line use of another specific method as HPLC is necessary.


Assuntos
Anemia Falciforme , Triagem Neonatal , Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz , Humanos , Anemia Falciforme/diagnóstico , Anemia Falciforme/sangue , Cromatografia Líquida de Alta Pressão/métodos , Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz/métodos , Recém-Nascido , Estudos Prospectivos , Triagem Neonatal/métodos , Hemoglobina Falciforme/análise
16.
Hemoglobin ; 48(2): 116-117, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38360540

RESUMO

We report a case of Hb S/ß0-thalassemia (Hb S/ß0-thal) in a patient who is a compound heterozygote for the Hb Sickle mutation (HBB:c.20A > T) and a mutation of the canonical splice acceptor sequence of IVS1 (AG > TG, HBB:c.93-2A > T). This is the fifth mutation involving the AG splice acceptor site of IVS1, all of which prevent normal splicing and cause ß0-thal.


Assuntos
Hemoglobina Falciforme , Mutação , Sítios de Splice de RNA , Talassemia beta , Humanos , Talassemia beta/genética , Talassemia beta/diagnóstico , Talassemia beta/sangue , Hemoglobina Falciforme/genética , Globinas beta/genética , Masculino , Heterozigoto , Anemia Falciforme/genética , Anemia Falciforme/diagnóstico , Feminino
17.
Pediatr Blood Cancer ; 71(5): e30912, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38348535

RESUMO

BACKGROUND: Youth with sickle cell disease (SCD) face several challenges as they age, including increased pain frequency, duration, and interference. The purpose of this study was to (i) determine the feasibility of routine pain screening; (ii) identify and describe various clinical pain presentations; and (iii) understand preferences/resources related to engaging in integrative health and medicine (IHM) modalities within an outpatient pediatric SCD clinic. METHODS: During routine outpatient visits, patients aged 8-18 completed measures of pain frequency, duration, and chronic pain risk (Pediatric Pain Screening Tool [PPST]). Participants screening positive for (i) persistent or chronic pain or (ii) medium or high risk for persistent symptoms and disability on the PPST were asked to complete measures of pain interference, pain catastrophizing, and interest in/resources for engaging in IHM modalities. RESULTS: Between March 2022 and May 2023, 104/141 (73.8%) patients who attended at least one outpatient visit were screened. Of these 104 (mean age 12.46, 53.8% female, 63.5% HbSS), 34 (32.7%) reported persistent or chronic pain, and 48 (46.2%) reported medium or high risk for persistent symptoms and disability. Patients completing subsequent pain screening measures reported a mean pain interference T-score of 53.2 ± 8.8 and a mean pain catastrophizing total score of 24.3 ± 10.2. Patients expressed highest interest in music (55.6%) and art therapy (51.9%) and preferred in-person (81.5%) over virtual programming (22.2%). CONCLUSIONS: Comprehensive pain screening is feasible within pediatric SCD care. Classifying patients by PPST risk may provide a means of triaging patients to appropriate services to address pain-related psychosocial factors.


Assuntos
Anemia Falciforme , Dor Crônica , Humanos , Criança , Feminino , Adolescente , Masculino , Dor Crônica/diagnóstico , Dor Crônica/etiologia , Melhoria de Qualidade , Anemia Falciforme/complicações , Anemia Falciforme/diagnóstico , Anemia Falciforme/psicologia , Catastrofização/psicologia , Medição da Dor
18.
Ann Hum Biol ; 51(1): 2308714, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38378484

RESUMO

BACKGROUND: Colombia has a mestizo population and the prevalence of haemoglobin variants varies according to each region, but heterozygous carriers can be found in all of them. AIM: To characterise sickle cell disease (SCD) haematologically, biochemically, and molecularly, and detect classic haplotypes by DNA sequencing in a group of samples from Bolívar, Colombia. SUBJECTS AND METHODS: Blood samples were collected after informed consent from volunteers from eight communities in the Bolívar department, plus samples from the Pacific region, Providencia Island, and Bogotá were included. Data were obtained from: (1) haematological analyses; (2) biochemical tests: dHPLC was used to determine haemoglobin (Hb); and (3) DNA sequencing data through five SNPs. RESULTS: 101 samples were identified by rs334 through Sanger's Sequencing, structural haemoglobinopathies HbAS (34.65%), HbSS (2.97%) and HbAC (1.98%) were found. When contrasting the Hb identification results between SNP rs334 Vs. dHPLC/Isoelectric Focusing (IEF), a coincidence was found in 39/43 samples analysed, therefore, when comparing these techniques, a significant correlation was found (Pearson's correlation coefficient r = 0.998). 26 samples previously analysed by rs334 were classified into classical haplotypes CAR (50.0%), BEN (30.76%), CAM (7.69%), SEN (3.84%), and ATP-I (7.69%). CONCLUSIONS: SCD characterisation and SNPs-based classification through Sanger's DNA sequencing have not been performed before in Colombia. The results of this work will make it possible to expand the data or records of carriers and those affected, which will benefit patients and their families.


Assuntos
Anemia Falciforme , Polimorfismo de Nucleotídeo Único , Humanos , Haplótipos , Colômbia , Globinas beta/genética , Anemia Falciforme/epidemiologia , Anemia Falciforme/genética , Anemia Falciforme/diagnóstico
19.
AJOB Empir Bioeth ; 15(2): 154-163, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38349128

RESUMO

BACKGROUND: Noninvasive prenatal testing (NIPT) designed to screen for fetal genetic conditions, is increasingly being implemented as a part of routine prenatal care screening in the United States (US). However, these advances in reproductive genetic technology necessitate empirical research on the ethical and social implications of NIPT among populations underrepresented in genetic research, particularly Black women with sickle cell disease (SCD). METHODS: Forty (N = 40) semi-structured interviews were conducted virtually with Black women in the US (19 participants with SCD; 21 participants without SCD) from June 2021 to January 2022. We employed a qualitative approach to examine the study participants' perceptions of the potential advancement of NIPT for screening SCD in the fetus. Data were analyzed using NVivo 12 qualitative software. RESULTS: The themes revealed the complexities involving the intersectional lived experiences of SCD, prenatal care, lack of synergy among health providers, and NIPT decision-making. The results further revealed that even when Black women have shared commonalities in their lived experiences while navigating SCD and motherhood, their perceptions of NIPT screening technologies are divergent. CONCLUSION: Expanding the ethical discourse on the social implications of NIPT is critical to fully elucidate how Black women perceive NIPT's utility, particularly as NIPT advances to screen for SCD in the fetus. Neglecting to include Black women with genetic conditions in empirical studies on NIPT may contribute to ongoing health inequities and limit and constrain reproductive choices among Black women with and without SCD.


Assuntos
Anemia Falciforme , Negro ou Afro-Americano , Teste Pré-Natal não Invasivo , Humanos , Feminino , Anemia Falciforme/diagnóstico , Teste Pré-Natal não Invasivo/ética , Gravidez , Adulto , Estados Unidos , Pesquisa Qualitativa , Cuidado Pré-Natal , Diagnóstico Pré-Natal , Testes Genéticos , Tomada de Decisões , Percepção , Adulto Jovem
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