Hemoglobin K-Woolwich (Hb KW) is a rare hemoglobin variant with very few cases reported. It is most prevalent in West African countries, particularly Nigeria, Ghana, and the Ivory Coast. Some reports suggest Hb KW may...Hemoglobin K-Woolwich (Hb KW) is a rare hemoglobin variant with very few cases reported. It is most prevalent in West African countries, particularly Nigeria, Ghana, and the Ivory Coast. Some reports suggest Hb KW may be a clinically benign trait, whereas others indicate it may behave similarly to a β+ thalassemia. The combination of hemoglobin S and hemoglobin KW (Hb S/KW) is a rare double heterozygous disorder with little known clinical characteristics. We report the hematologic and clinical data on three patients with Hb S/KW to help describe the characteristics of this patient population. The first two cases represent first cousins, ages 3 and 2 years. They are clinically asymptomatic. They have normal hemoglobin and mean corpuscle volume (MCV) levels without reticulocytosis. The third case is of a 14-year-old male who is non-anemic with no microcytosis. He has been clinically well except for abdominal pain upon dehydration. On hemoglobin electrophoresis, these patients have Hb S levels slightly higher than typically observed with sickle cell trait and a delay of hemoglobin F to adult levels. There exists a need for more reports to better delineate the clinical course and management of these patients.展开更多
研究了牛血红蛋白（Hemoglobin，Hb）作为过氧化物模拟酶，以酸性铬蓝K（Acid Chrome Blue K，ACBK）作为氢供体底物的酶催化反应体系的催化特性和反应条件．体系在pH9．6的条件下波长为536nm处有最大吸收．建立了褪色程度△A与H2O2浓...研究了牛血红蛋白（Hemoglobin，Hb）作为过氧化物模拟酶，以酸性铬蓝K（Acid Chrome Blue K，ACBK）作为氢供体底物的酶催化反应体系的催化特性和反应条件．体系在pH9．6的条件下波长为536nm处有最大吸收．建立了褪色程度△A与H2O2浓度的线性关系，从而建立了测定H2O2的新方法．测定过氧化氢的线性范围为4．0×10^-7～3．2×10^-5 mol／L，检出限为2．7×10^-8 mol/L．该方法用于雨水和消毒水中过氧化氢含量的测定,结果满意，加标回收率在95．0％-100．0％之间．展开更多
本文报道了应用醋酸纤维薄膜电泳在湖南省湘西地区的汉族、侗族人群中分离出二例快速异常血红蛋白。经一级结构分析证实为Hb New York[β113(G15)Val-Gln]本文还在国内首次应用薄层聚丙烯酰胺凝胶等电聚焦分离血红蛋白,将其分离效果与...本文报道了应用醋酸纤维薄膜电泳在湖南省湘西地区的汉族、侗族人群中分离出二例快速异常血红蛋白。经一级结构分析证实为Hb New York[β113(G15)Val-Gln]本文还在国内首次应用薄层聚丙烯酰胺凝胶等电聚焦分离血红蛋白,将其分离效果与醋纤电泳进行了比较。展开更多
文摘Hemoglobin K-Woolwich (Hb KW) is a rare hemoglobin variant with very few cases reported. It is most prevalent in West African countries, particularly Nigeria, Ghana, and the Ivory Coast. Some reports suggest Hb KW may be a clinically benign trait, whereas others indicate it may behave similarly to a β+ thalassemia. The combination of hemoglobin S and hemoglobin KW (Hb S/KW) is a rare double heterozygous disorder with little known clinical characteristics. We report the hematologic and clinical data on three patients with Hb S/KW to help describe the characteristics of this patient population. The first two cases represent first cousins, ages 3 and 2 years. They are clinically asymptomatic. They have normal hemoglobin and mean corpuscle volume (MCV) levels without reticulocytosis. The third case is of a 14-year-old male who is non-anemic with no microcytosis. He has been clinically well except for abdominal pain upon dehydration. On hemoglobin electrophoresis, these patients have Hb S levels slightly higher than typically observed with sickle cell trait and a delay of hemoglobin F to adult levels. There exists a need for more reports to better delineate the clinical course and management of these patients.
