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Polymorphisms and gene expression of metalloproteinases and their inhibitors associated with cerebral ischemic stroke in young patients with sickle cell anemia
CONCLUSION: The findings of this study, the SNPs, and expression provide initial support for understanding the role of MMPs-TIMPs in the pathophysiology of SCA in young patients.PMID:36720795 | DOI:10.1007/s11033-023-08262-2
Source: Molecular Biology Reports - January 31, 2023 Category: Molecular Biology Authors: Ó do Kleyton Palmeira Ana Karla da Silva Freire D ébora Nascimento de Nóbrega Roberta Dos Santos Souza Isabela Cristina Cordeiro Farias Taciana Furtado de Mendon ça Belmont Andreia Soares da Silva Gabriela da Silva Arcanjo Aderson da Silva Araujo Ana Source Type: research

Decompressive Craniectomy for Traumatic Brain Injury: Postoperative Cerebral Hemodynamic Evaluation
Conclusion: There is a wide heterogeneity of postoperative cerebral hemodynamic findings among TBI patients who underwent DC, including hemodynamic heterogeneity between their cerebral hemispheres. DC was proved to be effective for the treatment of cerebral oligoemia. Our data support the concept of heterogeneous nature of the pathophysiology of the TBI and suggest that DC as the sole treatment modality is insufficient. Introduction Decompressive craniectomy (DC) may effectively decrease intracranial pressure (ICP) and increase cerebral perfusion pressure (CPP) in traumatic brain injury (TBI) patients with refracto...
Source: Frontiers in Neurology - April 11, 2019 Category: Neurology Source Type: research

Decompressive Craniectomy for Traumatic Brain Injury: Postoperative TCD Cerebral Hemodynamic Evaluation
Conclusion: There is a wide heterogeneity of postoperative cerebral hemodynamic findings among TBI patients who underwent DC, including hemodynamic heterogeneity between their cerebral hemispheres. DC was proved to be effective for the treatment of cerebral oligoemia. Our data support the concept of heterogeneous nature of the pathophysiology of the TBI and suggest that DC as the sole treatment modality is insufficient. Introduction Decompressive craniectomy (DC) may effectively decrease intracranial pressure (ICP) and increase cerebral perfusion pressure (CPP) in traumatic brain injury (TBI) patients with refracto...
Source: Frontiers in Neurology - April 11, 2019 Category: Neurology Source Type: research

Alpha thalassemia, but not β S -globin haplotypes, influence sickle cell anemia clinical outcome in a large, single-center Brazilian cohort
AbstractAlpha thalassemia and beta-globin haplotype are considered classical genetic disease modifiers in sickle cell anemia (SCA) causing clinical heterogeneity. Nevertheless, their functional impact on SCA disease emergence and progression remains elusive. To better understand the role of alpha thalassemia and beta-globin haplotype in SCA, we performed a retrospective study evaluating the clinical manifestations of 614 patients. The univariate analysis showed that the presence of alpha-thalassemia −3.7-kb mutation (αα/-α and -α/-α) decreased the risk of stroke development (p = 0.046), priapism (p = 0.033), and cho...
Source: Annals of Hematology - February 13, 2021 Category: Hematology Source Type: research

Interleukin-10 haplotypes are not associated with acute cerebral ischemia or high-risk transcranial Doppler in a newborn cohort of 395 children with sickle cell anemia
Conclusion: Interleukin-10 haplotypes were not associated with the risk of acute cerebral ischemia or high-risk transcranial Doppler velocity in children with sickle cell anemia from the state of Minas Gerais, Brazil.
Source: Revista Brasileira de Hematologia e Hemoterapia - July 3, 2017 Category: Hematology Source Type: research

Generation of integration-free iPS cell lines from three sickle cell disease patients from the state of Bahia, Brazil
In this study, we generated induced pluripotent stem cell (iPSC) lines from three homozygous SCD patients from the state of Bahia, Brazil, where SCD is highly prevalent. Peripheral blood mononuclear cells were collected and erythroblasts were expanded for cell reprogramming with the use of non-integrative episomal vectors. The generated iPSC lines expressed high levels of pluripotency markers, presented a normal karyotype and were able to differentiate into the three germ layers in embryoid body spontaneous differentiation assays. Moreover, the expression of the episomal vectors was lost in all iPSC lines after 15 passages...
Source: Stem Cell Research - October 4, 2018 Category: Stem Cells Source Type: research

A Polymorphism in Toll-like Receptor 2 Gene Is Associated with Occurrence of Bacterial Infections in Sickle Cell Disease Patients
Discussion: In SCD pts, TLR-2 rs4696480 TA genotype might be protective against bacterial infections, whereas TT genotype might increase risk of such infections. Previous reports demonstrated higher secretion of inflammatory factors in cells from AA individuals, lower occurrence and severity of immune diseases in T carriers. TA genotype might stand between deleterious effects of over inflammatory response (AA genotype) and under response (TT genotype) to infectious agents.DisclosuresNo relevant conflicts of interest to declare.
Source: Blood - November 21, 2018 Category: Hematology Authors: Tozatto-Maio, K., Girot, R., Ly, I. D., Rocha, V., Pinto, A. C. S., Diagne, I., Benzerara, Y., Dinardo, C. L., Kashima, S., Araujo, I. L., Kenzey, C., Fonseca, G. H. H., Rodrigues, E., Volt, F., Jarduli, L. R., Ruggeri, A., Mariaselvam, C. M., Gualandro, Tags: 113. Hemoglobinopathies, Excluding Thalassemia-Basic and Translational Science: Poster III Source Type: research

High levels of proinflammatory cytokines IL-6 and IL-8 are associated with a poor clinical outcome in sickle cell anemia
AbstractSickle cell anemia (SCA) pathophysiology is characterized by the activation of sickle red blood cells, reticulocytes, leukocytes, platelets, and endothelial cells, and with the expression of several inflammatory molecules. Therefore, it is conceivable that variations in levels of proinflammatory cytokines may act as a signaling of differential clinical course in SCA. Here, we evaluated the clinical impact of proinflammatory cytokines interleukin 1- β (IL-1β), interleukin 6 (IL-6), and interleukin 8 (IL-8) in 79 patients with SCA, followed in a single reference center from northeastern Brazil. The main clinical/la...
Source: Annals of Hematology - March 4, 2020 Category: Hematology Source Type: research