Iron overload in transfusion-dependent survivors of hemoglobin Bart's hydrops fetalis.
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ABSTRACT:
SUBMITTER: Amid A
PROVIDER: S-EPMC5927987 | biostudies-literature |
REPOSITORIES: biostudies-literature
Similar Datasets
Project description:This SuperSeries is composed of the SubSeries listed below.
2023-09-26 | GSE184927 | GEO
Project description:Hemoglobin Bart’s hydrops fetalis syndrome (BHFS) is the most severe form of α-thalassemia. Histological alternations can be observed in placenta, but placental transcriptome profile and circular RNAs have not been study in this disease. The aim of this study was to define the placental transcriptional changes and find relevant circular RNAs in BHFS. We performed high-throughput RNA sequencing to detect placental samples from fetuses affected by BHFS (n=5) and normal fetuses (NF, n=5). Our results showed 152 differentially expressed genes (DEGs), 112 circRNAs, and 45 microRNAs that were differentially expressed. DEGs were found to be involved in Gene Ontology terms related to gas transport, cell adhesion, oxidative stress, organ development, hemopoiesis, etc. Our study characterized the placental transcriptome of BHFS.
2023-09-26 | GSE184925 | GEO
Project description:Hemoglobin Bart’s hydrops fetalis syndrome (BHFS) is the most severe form of α-thalassemia. Histological alternations can be observed in placenta, but placental transcriptome profile and circular RNAs have not been study in this disease. The aim of this study was to define the placental transcriptional changes and find relevant circular RNAs in BHFS. We performed high-throughput RNA sequencing to detect placental samples from fetuses affected by BHFS (n=5) and normal fetuses (NF, n=5). Our results showed 152 differentially expressed genes (DEGs), 112 circRNAs, and 45 microRNAs that were differentially expressed. DEGs were found to be involved in Gene Ontology terms related to gas transport, cell adhesion, oxidative stress, organ development, hemopoiesis, etc. Our study characterized the placental transcriptome of BHFS.
2023-09-26 | GSE184915 | GEO
Project description:The ?-thalassemia trait, associated with deletions removing both ?-globin genes from 1 chromosome (genotype ? ??/?--), is common throughout Southeast Asia. Consequently, many pregnancies in couples of Southeast Asian origin carry a 1 in 4 risk of producing a fetus inheriting no functional ?-globin genes (?--/?--), leading to hemoglobin (Hb) Bart's hydrops fetalis syndrome (BHFS). Expression of the embryonic ?-globin genes (?-globin) is normally limited to the early stages of primitive erythropoiesis, and so when the ?-globin genes are silenced, at ?6 weeks of gestation, there should be no ?-like globin chains to pair with the fetal ?-globin chains of Hb, which consequently form nonfunctional tetramers (?4) known as Hb Bart's. When deletions leave the ?-globin gene intact, a low level of ?-globin gene expression continues in definitive erythroid cells, producing small amounts of Hb Portland (?2?2), a functional form of Hb that allows the fetus to survive up to the second or third trimester. Untreated, all affected individuals die at these stages of development. Prevention is therefore of paramount importance. With improvements in early diagnosis, intrauterine transfusion, and advanced perinatal care, there are now a small number of individuals with BHFS who have survived, with variable outcomes. A deeper understanding of the mechanism underlying the switch from ?- to ?-globin expression could enable persistence or reactivation of embryonic globin synthesis in definitive cells, thereby providing new therapeutic options for such patients.
| S-EPMC6246003 | biostudies-literature
Project description:RNA expression in human placental tissue with Hemoglobin Bart's Hydrops Fetalis Syndrome
| PRJNA767043 | ENA
Project description:MiRNAs expression in human placental tissue with Hemoglobin Bart's Hydrops Fetalis Syndrome
| PRJNA767050 | ENA
Project description:BackgroundIron overload is one of the main factors that increase morbidity and mortality in patients with non-transfusion dependent thalassemia (NTDT).AimThis study aimed at investigating the prevalence and severity of iron overload in Chinese NTDT patients.Methodswe analyzed serum ferritin (SF), liver iron concentration (LIC) and cardiac T2* in 178 Chinese NTDT in this cross-sectional study.ResultsThe median SF level was 996.00(27.15-19704.00) ng/ml and the median LIC value was 8.90(0.60-43.00) mg Fe/g dry weight (dw). The youngest patient with liver iron overload was 5 years old with 5.6 mg Fe/g dw in LIC. The median cardiac T2* was 33.06(7.46-75.08) ms. 6 patients had cardiac T2*⩽20ms. The patients with β thalassemia intermedia and HbE/β thalassemia showed a statistically significant lower Hb and higher values of SF and LIC than those of hemoglobin H disease patients. On multivariate logistic regression analysis, patients in ⩾ age 30-year old had a significant higher risk for iron overload (OR: 77.75, 95% CI: 8.76-690.49) in the age group. The detailed analysis of proportions of different LIC indicate in > 30-year old group, 76.8% patients suffered from moderate and severe LIC.ConclusionOur study provides a strong support for the novel findings that Chinese NTDT patients have a high prevalence of iron overload. The first assessment of MRI LIC should be performed as early as 5 years old. Then, NTDT patients > 30 years old may suffer with a high burden of iron overload.
| S-EPMC8935562 | biostudies-literature
Project description:Fetal heart failure and hydrops fetalis may occur due to systemic arteriovenous fistula because of increased cardiac output. Arteriovenous fistula of the central nervous system, liver, bone or vascular tumors such as sacrococcygeal teratoma were previously reported to be causes of intrauterine heart failure. However, coronary arteriovenous fistula was not reported as a cause of fetal heart failure previously. It is a rare pathology comprising 0.2-0.4% of all congenital heart diseases even during postnatal life. Some may remain asymptomatic for many years and diagnosed by auscultation of a continuous murmur during a routine examination, while a larger fistulous coronary artery opening to a low pressure cardiac chamber may cause ischemia of the affected myocardial region due to steal phenomenon and may present with cardiomyopathy or congestive heart failure during childhood. We herein report a neonate with coronary arteriovenous fistula between the left main coronary artery and the right ventricular apex, who presented with hydrops fetalis during the third trimester of pregnancy.
| S-EPMC4160637 | biostudies-other
Project description:α0-thalassemia of SEA deletion (-SEA) is common among Southeast Asian and Chinese. Using haplotype and phylogenetic analyses, we examined the origin of this defect in Southeast Asian populations. Study was done on both normal and α0-thalassemia alleles in 3 ethnic groups including 96 Thai, 52 Laotian and 21 Cambodian. Five SNPs encompassing the (-SEA) including (rs3760053 T>G), (rs1211375 A>C), (rs3918352 A>G), (rs1203974 A>G) and (rs11248914 C>T) were examined using high-resolution melting assays. It was found that 94.0% of Thai, 100% of Laotian and 100% of Cambodian α0-thalassemia alleles were linked to the same haplotype: the haplotype H4 (AAGC), representing an Asian specific origin. An G allele of the (rs3760053) was found to be in strong linkage disequilibrium with the α0-thalassemia allele in these populations. A multiplex PCR assay was developed to detect simultaneously the (-SEA) allele and genotyping of a linked (rs3760053) to improve accuracy of prenatal diagnosis of α0-thalassemia. Application of this multiplex PCR assay for routine prenatal diagnosis of α0-thalassemia in 12 families revealed a 100% concordant result with conventional gap-PCR assay. Therefore, a single genetic origin is responsible for the spread and high prevalence of the (-SEA) in the region. The multiplex PCR assay developed should provide a double-check PCR system for more accurate diagnosis and allow the monitoring of possible maternal contamination at prenatal diagnosis of this important genetic disorder.
| S-EPMC5584512 | biostudies-literature
Project description:Background Familial hemophagocytic lymphohistiocytosis (FLH) is an autosomal recessive disorder of immune regulation that leads to a hyperinflammatory syndrome. Fetal onset FHL is extremely rare and is considered to be the most severe form of FHL. Case We report a preterm case of FHL that presented as hydrops fetalis. The infant was treated with a chemotherapy regimen based on the HLH-2004 protocol from the third day of life. However, he had persistent cytopenia and died on the 18th day of life due to bacteremia. The detection of defective perforin expression in the patient's natural killer cells and mutations in the PRF1 gene resulted in a molecular diagnosis of FHL. Conclusion We suggest that early diagnosis and the development of an appropriate immunosuppressive strategy that can induce and maintain remission until hematopoietic stem cell transplantation can be performed are required to improve the outcomes of fetal onset FHL.
| S-EPMC4502624 | biostudies-other