RESUMEN
Due to the high transfusion volume, polytransfused patients with sickle cell disease (SCD) and beta-thalassemia are constantly exposed to parenterally transmitted infections. Currently, we have little information about the virome of such patients and how the virological composition might be influenced by the hemotherapy procedures that these patients receive. The objective of this study was to compare the viral diversity between these two groups with respect to the viral abundance and how it might be affected by the specific conditions of these groups. We sequenced by next-generation sequencing (NGS) and compared the virome of 30 patients with beta-thalassemia major, 45 with SCD, and 16 blood donors from the Blood Center of Ribeirão Preto, Brazil. Predominantly, commensal viruses including Torque teno virus (TTV) genotypes and human pegiviris-1 (HPgV-1) were identified in each group. Strikingly, while HPgV-1 reads were dominant in the SCD group, thalassemic patients showed high TTV abundance, expressed both in viral reads and genotypes. We speculated that the commensal virome of polytransfused patients might be influenced by the transfusion frequency and disease characteristics and that commensal viruses might be used as important genetic biomarkers for these hematological disturbances. Nevertheless, more specific studies are necessary to confirm a relationship between blood virome and transfusion treatment.
Asunto(s)
Infecciones por Virus ADN , Torque teno virus , Donantes de Sangre , Transfusión Sanguínea , ADN Viral , Genotipo , Humanos , Torque teno virus/genéticaRESUMEN
Due to the high transfusion volume, polytransfused patients with sickle cell disease (SCD) and beta-thalassemia are constantly exposed to parenterally transmitted infections. Currently, we have little information about the virome of such patients and how the virological composition might be influenced by the hemotherapy procedures that these patients receive. The objective of this study was to compare the viral diversity between these two groups with respect to the viral abundance and how it might be affected by the specific conditions of these groups. We sequenced by next-generation sequencing (NGS) and compared the virome of 30 patients with beta-thalassemia major, 45 with SCD, and 16 blood donors from the Blood Center of Ribeirão Preto, Brazil. Predominantly, commensal viruses including Torque teno virus (TTV) genotypes and human pegiviris-1 (HPgV-1) were identified in each group. Strikingly, while HPgV-1 reads were dominant in the SCD group, thalassemic patients showed high TTV abundance, expressed both in viral reads and genotypes. We speculated that the commensal virome of polytransfused patients might be influenced by the transfusion frequency and disease characteristics and that commensal viruses might be used as important genetic biomarkers for these hematological disturbances. Nevertheless, more specific studies are necessary to confirm a relationship between blood virome and transfusion treatment.
RESUMEN
Due to the high transfusion volume, polytransfused patients with sickle cell disease (SCD) and beta-thalassemia are constantly exposed to parenterally transmitted infections. Currently, we have little information about the virome of such patients and how the virological composition might be influenced by the hemotherapy procedures that these patients receive. The objective of this study was to compare the viral diversity between these two groups with respect to the viral abundance and how it might be affected by the specific conditions of these groups. We sequenced by next-generation sequencing (NGS) and compared the virome of 30 patients with beta-thalassemia major, 45 with SCD, and 16 blood donors from the Blood Center of Ribeirão Preto, Brazil. Predominantly, commensal viruses including Torque teno virus (TTV) genotypes and human pegiviris-1 (HPgV-1) were identified in each group. Strikingly, while HPgV-1 reads were dominant in the SCD group, thalassemic patients showed high TTV abundance, expressed both in viral reads and genotypes. We speculated that the commensal virome of polytransfused patients might be influenced by the transfusion frequency and disease characteristics and that commensal viruses might be used as important genetic biomarkers for these hematological disturbances. Nevertheless, more specific studies are necessary to confirm a relationship between blood virome and transfusion treatment.
RESUMEN
Introducción: El situs inversus totalis es un hallazgo poco común. Sólo un pequeño porcentaje presentará cardiopatías asociadas, por lo que el diagnóstico suele realizarse de forma casual. Objetivo: Destacar las claves diagnósticas del situs inversus totalis y la importancia de un diagnóstico temprano. Caso clínico: Presentamos dos pacientes pediátricos de 9 y 14 años que fueron diagnosticados de forma incidental. El primer caso fue estudiado por dolor precordial, en la auscultación cardíaca se escuchaba aumento de ruidos cardíacos en precordio derecho y atenuados en el izquierdo. El electrocardiograma (ECG) mostró eje QRS y onda P de +150°, QRS estrecho de voltaje atenuado en precordiales V3-V6 y ondas T negativas en V1-V4 y aVL. La radiografía de tórax confirmó dextrocardia, además se apreció burbuja gástrica a la derecha y sombra hepática a la izquierda. La ecocardiografía evidenció dextrocardia especular clásica sin malformaciones asociadas. En el segundo caso se encontró incidentalmente dextrocardia en radiografía solicitada para evaluación de escoliosis. El ECG objetivó eje QRS +120°, eje onda P +150°, QRS estrecho de voltaje atenuado en precordiales izquierdas. La ecocardiografía doppler confirmó dextrocardia especular sin anomalías asociadas. En ecografía abdominal el hígado se encontró en hipocondrio izquierdo y el bazo en hipocondrio derecho. Conclusión: El diagnóstico temprano del situs inversus totalis es importante, dado que el abordaje quirúrgico torácico y abdominal es diferente y determinadas patologías pueden presentarse con clínica inusual. Además, tras el diagnóstico de situs inversus se puede estudiar la presencia de patologías asociadas como discinesia ciliar primaria (Síndrome de Kartagener).
Introduction: Situs inversus totalis is a rare find and only a small percentage are associated with heart disease; its diagnosis is usually made incidentally. Objective: To discuss the diagnostic features of situs inversus totalis and the importance of early diagnosis. Case reports: Two pediatric patients aged 9 and 14 years who were incidentally diagnosed are reported. The first case presented chest pain and during cardiac auscultation, increased heart sounds were heard on the right precordium and attenuated on the left. An electrocardiogram (ECG) showed P wave and QRS axis equal to +150°, narrow QRS voltage attenuated in V3-V6 precordial leads, and negative T waves in leads V1-V4 and aVL. Chest radiography confirmed dextrocardia, and gastric bubble was on the right and hepatic shadow on the left. Echocardiography showed classic mirror dextrocardia without associated malformations. In the second case, dextrocardia was found incidentally after radiography was requested for the evaluation of scoliosis. ECG showed QRS of +120°, P wave axis of +150° and narrow QRS voltage axis attenuated on left precordial leads. Doppler echocardiography confirmed dextrocardia without associated anomalies. Abdominal ultrasound found the liver in left upper quadrant and the spleen in right upper quadrant. Conclusions: Early diagnosis of situs inversus totalis is important because the thoracic and abdominal surgical approach is different and certain diseases could be presented with unusual characteristics. Also, after the diagnosis of situs inversus, the presence of associated pathologies such as primary ciliary dyskinesia can be studied (Kartagener syndrome).
Asunto(s)
Humanos , Masculino , Adolescente , Niño , Síndrome de Kartagener/diagnóstico , Situs Inversus/diagnóstico , Dextrocardia/diagnóstico , Ecocardiografía , Electrocardiografía , Hallazgos Incidentales , Radiografía TorácicaRESUMEN
INTRODUCTION: Situs inversus totalis is a rare find and only a small percentage are associated with heart disease; its diagnosis is usually made incidentally. OBJECTIVE: To discuss the diagnostic features of situs inversus totalis and the importance of early diagnosis. CASE REPORTS: Two pediatric patients aged 9 and 14 years who were incidentally diagnosed are reported. The first case presented chest pain and during cardiac auscultation, increased heart sounds were heard on the right precordium and attenuated on the left. An electrocardiogram (ECG) showed P wave and QRS axis equal to +150°, narrow QRS voltage attenuated in V3-V6 precordial leads, and negative T waves in leads V1-V4 and aVL. Chest radiography confirmed dextrocardia, and gastric bubble was on the right and hepatic shadow on the left. Echocardiography showed classic mirror dextrocardia without associated malformations. In the second case, dextrocardia was found incidentally after radiography was requested for the evaluation of scoliosis. ECG showed QRS of +120°, P wave axis of +150° and narrow QRS voltage axis attenuated on left precordial leads. Doppler echocardiography confirmed dextrocardia without associated anomalies. Abdominal ultrasound found the liver in left upper quadrant and the spleen in right upper quadrant. CONCLUSIONS: Early diagnosis of situs inversus totalis is important because the thoracic and abdominal surgical approach is different and certain diseases could be presented with unusual characteristics. Also, after the diagnosis of situs inversus, the presence of associated pathologies such as primary ciliary dyskinesia can be studied (Kartagener syndrome).