Evilazio Cunha Cardoso, Pedro Vieira Silva-Neto, Bidossessi Wilfried Hounkpe, Francine Chenou, Cintia Cristina Mateus Xerez Albuquerque, Nadja Pinto Garcia, Alexander Leonardo Silva-Junior, Adriana Malheiro, Purim Cesar, Franciele de Lima, Erich V De Paula, Nelson Abrahim Fraiji
{"title":"镰状细胞性贫血急性血管闭塞危象期间血红素水平的变化。","authors":"Evilazio Cunha Cardoso, Pedro Vieira Silva-Neto, Bidossessi Wilfried Hounkpe, Francine Chenou, Cintia Cristina Mateus Xerez Albuquerque, Nadja Pinto Garcia, Alexander Leonardo Silva-Junior, Adriana Malheiro, Purim Cesar, Franciele de Lima, Erich V De Paula, Nelson Abrahim Fraiji","doi":"10.1016/j.hemonc.2021.08.002","DOIUrl":null,"url":null,"abstract":"<p><strong>Objective/background: </strong>Sickle cell anemia (SCA) is associated with increased levels of extracellular heme, which is a key mediator of inflammation in this condition. Despite abundant evidence supporting this concept in cell and animal models, few studies addressed the association between heme levels and the development and severity of acute vasoocclusive crises (VOC) in humans.</p><p><strong>Methods: </strong>A cross-sectional study was conducted in patients with acute VOC. Total extracellular heme levels were measured in both plasma and serum at admission and after convalescence, and correlated with other clinical and laboratory markers of SCA severity.</p><p><strong>Results: </strong>A total of 28 episodes of VOC in 25 patients were included. Heme levels were similar between admission and convalescence, and correlated with the difference between pre and post hemoglobin, and SCA severity estimated by a composite score of clinical and laboratory markers. Heme levels were neither associated with VOC severity nor with markers of hemostasis activation, and were similar to those reported in an independent population of SCA patients at steady state.</p><p><strong>Discussion: </strong>Acute VOC are not characterized by significant increases in total extracellular heme levels. Studies measuring the fraction of free extracellular heme unbound to proteins are warranted to further refine our understanding of the role of heme in acute VOC.</p>","PeriodicalId":39226,"journal":{"name":"Hematology/ Oncology and Stem Cell Therapy","volume":"16 2","pages":"124-132"},"PeriodicalIF":0.0000,"publicationDate":"2023-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.hemonc.2021.08.002","citationCount":"2","resultStr":"{\"title\":\"Changes in Heme Levels During Acute Vaso-occlusive Crisis in Sickle Cell Anemia.\",\"authors\":\"Evilazio Cunha Cardoso, Pedro Vieira Silva-Neto, Bidossessi Wilfried Hounkpe, Francine Chenou, Cintia Cristina Mateus Xerez Albuquerque, Nadja Pinto Garcia, Alexander Leonardo Silva-Junior, Adriana Malheiro, Purim Cesar, Franciele de Lima, Erich V De Paula, Nelson Abrahim Fraiji\",\"doi\":\"10.1016/j.hemonc.2021.08.002\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Objective/background: </strong>Sickle cell anemia (SCA) is associated with increased levels of extracellular heme, which is a key mediator of inflammation in this condition. Despite abundant evidence supporting this concept in cell and animal models, few studies addressed the association between heme levels and the development and severity of acute vasoocclusive crises (VOC) in humans.</p><p><strong>Methods: </strong>A cross-sectional study was conducted in patients with acute VOC. Total extracellular heme levels were measured in both plasma and serum at admission and after convalescence, and correlated with other clinical and laboratory markers of SCA severity.</p><p><strong>Results: </strong>A total of 28 episodes of VOC in 25 patients were included. Heme levels were similar between admission and convalescence, and correlated with the difference between pre and post hemoglobin, and SCA severity estimated by a composite score of clinical and laboratory markers. Heme levels were neither associated with VOC severity nor with markers of hemostasis activation, and were similar to those reported in an independent population of SCA patients at steady state.</p><p><strong>Discussion: </strong>Acute VOC are not characterized by significant increases in total extracellular heme levels. Studies measuring the fraction of free extracellular heme unbound to proteins are warranted to further refine our understanding of the role of heme in acute VOC.</p>\",\"PeriodicalId\":39226,\"journal\":{\"name\":\"Hematology/ Oncology and Stem Cell Therapy\",\"volume\":\"16 2\",\"pages\":\"124-132\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2023-01-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/j.hemonc.2021.08.002\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Hematology/ Oncology and Stem Cell Therapy\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1016/j.hemonc.2021.08.002\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"Medicine\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Hematology/ Oncology and Stem Cell Therapy","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1016/j.hemonc.2021.08.002","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Medicine","Score":null,"Total":0}
Changes in Heme Levels During Acute Vaso-occlusive Crisis in Sickle Cell Anemia.
Objective/background: Sickle cell anemia (SCA) is associated with increased levels of extracellular heme, which is a key mediator of inflammation in this condition. Despite abundant evidence supporting this concept in cell and animal models, few studies addressed the association between heme levels and the development and severity of acute vasoocclusive crises (VOC) in humans.
Methods: A cross-sectional study was conducted in patients with acute VOC. Total extracellular heme levels were measured in both plasma and serum at admission and after convalescence, and correlated with other clinical and laboratory markers of SCA severity.
Results: A total of 28 episodes of VOC in 25 patients were included. Heme levels were similar between admission and convalescence, and correlated with the difference between pre and post hemoglobin, and SCA severity estimated by a composite score of clinical and laboratory markers. Heme levels were neither associated with VOC severity nor with markers of hemostasis activation, and were similar to those reported in an independent population of SCA patients at steady state.
Discussion: Acute VOC are not characterized by significant increases in total extracellular heme levels. Studies measuring the fraction of free extracellular heme unbound to proteins are warranted to further refine our understanding of the role of heme in acute VOC.
期刊介绍：
Hematology Oncology and Stem Cell Therapy is an international, peer-reviewed, open access journal that provides a vehicle for publications of high-quality clinical as well as basic science research reports in hematology and oncology. The contents of the journal also emphasize the growing importance of hematopoietic stem cell therapy for treatment of various benign and malignant hematologic disorders and certain solid tumors.The journal prioritizes publication of original research articles but also would give consideration for brief reports, review articles, special communications, and unique case reports. It also offers a special section for clinically relevant images that provide an important educational value.
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