{"id":10143,"date":"2025-09-23T22:27:07","date_gmt":"2025-09-23T22:27:07","guid":{"rendered":"https:\/\/atlasemhematologia.com.br\/?p=10143"},"modified":"2026-03-24T20:01:21","modified_gmt":"2026-03-24T20:01:21","slug":"anemia-falciforme","status":"publish","type":"post","link":"https:\/\/atlasemhematologia.com.br\/blog\/anemia-falciforme\/","title":{"rendered":"ANEMIA FALCIFORME E ALTERA\u00c7\u00d5ES NA HEMOSTASIA"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">A anemia falciforme \u00e9 uma condi\u00e7\u00e3o gen\u00e9tica provocada por uma muta\u00e7\u00e3o no gene da hemoglobina beta, resultando na forma\u00e7\u00e3o de hemoglobina S (HbS). Essa hemoglobina S se origina de uma substitui\u00e7\u00e3o de bases nitrogenadas, que altera o \u00e1cido glut\u00e2mico por valina na posi\u00e7\u00e3o 6 do gene da globina beta, localizado no cromossomo 11. Em condi\u00e7\u00f5es de baixo oxig\u00eanio, a valina mutante exp\u00f5e-se e interage com amino\u00e1cidos de outras globinas beta, iniciando o fen\u00f4meno da polimeriza\u00e7\u00e3o, que modifica a forma dos eritr\u00f3citos, tornando-os alongados e, por vezes, curvos, com um formato semelhante \u00e0 foice:<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter is-resized\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXcWEpEBu2W9x9AXEEqtMSvtq-nFftsmUu6n5WdW2XG39bOvN4ALS4NuaLMrMhOluukUq1faijMtrNPNiCnggwTsOZvvcw80kD6TiMAs8GPsi1smHGWY8ISoe00n49SWsoW0uqg_na2jZtNHigbeshSejrA?key=FmELULVPLCls-PaaGubx3g\" alt=\"anemia falciforme\" style=\"width:470px;height:auto\"\/><figcaption class=\"wp-element-caption\"><em>Drepan\u00f3citos em doen\u00e7a falciforme. Fonte: Cellwiki<\/em><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Na anemia falciforme, a mudan\u00e7a na forma das hem\u00e1cias afeta a fun\u00e7\u00e3o da bomba Na+\/K+, levando \u00e0 perda de pot\u00e1ssio e \u00e1gua, tornando as hem\u00e1cias mais densas e. H\u00e1 tamb\u00e9m um aumento do c\u00e1lcio intracelular, pois a bomba de Ca2+\/ATPase deixa de funcionar, resultando em maior concentra\u00e7\u00e3o de hemoglobina corpuscular m\u00e9dia (CHCM) e redu\u00e7\u00e3o da permeabilidade celular. Essas altera\u00e7\u00f5es cont\u00ednuas na forma das hem\u00e1cias causam danos cr\u00f4nicos \u00e0 membrana celular, tornando-as irreversivelmente falciformes.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A vaso-oclus\u00e3o come\u00e7a com a ader\u00eancia das c\u00e9lulas falciformes ao endot\u00e9lio vascular, seguida pelo ac\u00famulo de c\u00e9lulas menos deformadas. A oclus\u00e3o microvascular est\u00e1 relacionada \u00e0 concentra\u00e7\u00e3o de pol\u00edmeros de HbS formados. A ader\u00eancia de hem\u00e1cias falciformes ao endot\u00e9lio vascular causa hip\u00f3xia tecidual, aumentando a presen\u00e7a de HbS desoxi e resultando em mais danos aos tecidos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Os fosfolip\u00eddios, presentes na superf\u00edcie interna da membrana das hem\u00e1cias, sofrem assimetria na doen\u00e7a falciforme, expondo a fosfatidilserina. Isso ativa prote\u00ednas de coagula\u00e7\u00e3o e plaquetas, aumenta a express\u00e3o de mol\u00e9culas de ades\u00e3o no endot\u00e9lio vascular e contribui para a anemia, pois as c\u00e9lulas falciformes s\u00e3o removidas pelo sistema fagocit\u00e1rio, reduzindo seu tempo de vida na corrente sangu\u00ednea.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A atividade fibrinol\u00edtica pode causar crises dolorosas em pacientes com anemia falciforme. As plaquetas circulantes permanecem cronicamente ativadas, mantendo um estado hipercoagul\u00e1vel. No entanto, durante crises dolorosas agudas, observa-se uma redu\u00e7\u00e3o na sobrevida das plaquetas, provavelmente devido \u00e0 deposi\u00e7\u00e3o plaquet\u00e1ria nas paredes do endot\u00e9lio vascular.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Portanto, a compreens\u00e3o das altera\u00e7\u00f5es na Anemia Falciforme \u00e9 crucial para a gest\u00e3o eficaz da doen\u00e7a e a redu\u00e7\u00e3o das complica\u00e7\u00f5es associadas. Abordagens terap\u00eauticas que visam n\u00e3o apenas a corre\u00e7\u00e3o dos sintomas hematol\u00f3gicos, mas tamb\u00e9m a modula\u00e7\u00e3o dos mecanismos hemost\u00e1ticos, s\u00e3o fundamentais para melhorar a qualidade de vida dos portadores.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/eventos.atlasemhematologia.com.br\/listadeesperatimeblogatlas\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1030\" height=\"276\" src=\"https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/03\/BANNER-BLOG-ATLAS-1030x276.png\" alt=\"\" class=\"wp-image-17314\" srcset=\"https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/03\/BANNER-BLOG-ATLAS-1030x276.png 1030w, https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/03\/BANNER-BLOG-ATLAS-300x80.png 300w, https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/03\/BANNER-BLOG-ATLAS-768x206.png 768w, https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/03\/BANNER-BLOG-ATLAS-1536x411.png 1536w, https:\/\/atlasemhematologia.com.br\/blog\/wp-content\/uploads\/2026\/03\/BANNER-BLOG-ATLAS-2048x549.png 2048w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Refer\u00eancias<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">ZAGO, Marco Antonio; FALC\u00c3O, Roberto Passetto; PASQUINI, Ricardo. Hematologia fundamentos e pr\u00e1tica. In: Hematologia fundamentos e pr\u00e1tica. 2005. p. 1101-1101.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Stypulkowski JB, Manfredini V. Altera\u00e7\u00f5es hemost\u00e1sticas em pacientes com doen\u00e7a falciforme. Associa\u00e7\u00e3o Brasileira de Hematologia e Hemoterapia, 2010.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">NAOUM, Fl\u00e1vio Augusto. Doen\u00e7as que alteram os exames hematol\u00f3gicos. 2. ed. Rio de Janeiro: Atheneu, 2017.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A anemia falciforme \u00e9 uma condi\u00e7\u00e3o gen\u00e9tica provocada por uma muta\u00e7\u00e3o no gene da hemoglobina beta, resultando na forma\u00e7\u00e3o de hemoglobina S (HbS). Essa hemoglobina S se origina de uma substitui\u00e7\u00e3o de bases nitrogenadas, que altera o \u00e1cido glut\u00e2mico por valina na posi\u00e7\u00e3o 6 do gene da globina beta, localizado no cromossomo 11. Em condi\u00e7\u00f5es [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":17083,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"pagelayer_contact_templates":[],"_pagelayer_content":"","footnotes":""},"categories":[14,12],"tags":[],"class_list":["post-10143","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-anemias","category-hemostasia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ANEMIA FALCIFORME E ALTERA\u00c7\u00d5ES NA HEMOSTASIA - Blog - Atlas em Hematologia<\/title>\n<meta name=\"description\" content=\"A anemia falciforme \u00e9 uma condi\u00e7\u00e3o gen\u00e9tica provocada por uma muta\u00e7\u00e3o no gene da hemoglobina beta, resultando na forma\u00e7\u00e3o de\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/atlasemhematologia.com.br\/blog\/anemia-falciforme\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ANEMIA FALCIFORME E ALTERA\u00c7\u00d5ES NA HEMOSTASIA - 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