V. NEEL, M.D., PH.D. T HIS REPORT deals with a new inherited abnormality of hemoglobin encountered in American Negroes. The existence of this traitcame to light ill the course of extensive clinical and genetic studies u’egarding the sickling pheuiomenon. Among the individuals examined thei’e were anumber of patients ‘it-h a hemolytic syndrome associated with erythrocytic sickling in whom neithe...

Hemoglobin E is very common in parts of Southeast Asia. The possible malaria protective effects of this and other inherited hemoglobin abnormalities prevalent in Thailand were assessed in a mixed erythrocyte invasion assay. In vitro, starting at 1% parasitemia, Plasmodium falciparum preferentially invaded normal (HbAA) compared to abnormal hemoglobin (HbH, AE, EE, HCS, beta-thalassemia E) red c...

Hemoglobin H (Hb H) disease is the most common form of thalassemia intermedia and has many features that require careful consideration in management. In the majority of cases, Hb H disease results from double heterozygosity for alpha(0)-thalassemia due to deletions that remove both linked alpha-globin genes on chromosome 16, and deletional alpha(+)-thalassemia from single alpha-globin gene dele...

Abstract Background Iron-deficiency anemia is a widespread public health problem with major consequences for human health especially, children. However, in a fraction of patients an underlying cause is never found during routine investigation. Recent studies have suggested an association between Helicobacter pylori (H. Pylori) infection and iron-deficiency ...

In this article, an interference caused by hemoglobin H (Hb H), during the measurement of hemoglobin A1c (HbA1c) with ion exchange high pressure liquid chromatography (HPLC) method, was presented in blood sample of a 20-year-old male patient. HbA1c measurement was performed with Agilent 1200 HPLC system using a commercial Recipe HbA1c ion-exchange column. Hemoglobin electrophoresis was performe...

In the present study, we fabricated a hemoglobin/gold nanoparticle (Hb/GNP) heterolayer immobilized on the Au micro-gap to confirm H₂O₂ detection with a signal-enhancement effect. The hemoglobin which contained the heme group catalyzed the reduction of H₂O₂. To facilitate the electron transfer between hemoglobin and Au micro-gap electrode, a gold nanoparticle was introduced. The Au micro-gap el...

OBJECTIVES The clinical analysis of hemoglobin by ion exchange chromatography can result in ambiguities in identification of the nature of the globin chain present in patient samples. LC/ESI-MS provides rapid and precise determination of globin chain masses. DESIGN AND METHODS Hemolysate of hemoglobin Q-India and hemoglobin S/D/F have been analyzed using ESI-MS. Tandem-MS has been used to est...

OBJECTIVES To evaluate the stability of complete blood count (CBC) parameters by measuring at multiple time points up to 72 h after venepuncture. METHODS 36 samples submitted for routine haematology were measured at 0, 8, 24, 48, 72 h. 18 samples were kept at room temperature (23-25 °C) and the other 18 at 4 °C. The stability of the CBC parameters was determined by comparing the results to th...

Binding of biotinylated human hemoglobin to Haemophilus influenzae was detected when organisms were grown in heme-deplete, but not heme-replete, conditions. Hemoglobin binding was completely inhibited by a 100-fold excess of unlabelled human hemoglobin or human hemoglobin complexed with human haptoglobin. Binding was only partially inhibited by rat hemoglobin, bovine hemoglobin, human globin, a...

Primary cultures of Friend virus-infected spleen cells have a marked increase of hemoglobin synthesis in vitro in the absence of added erythropoietin. Seven sulfhydryl compounds were tested in this liquid culture system and all were found to enhance hemoglobin synthesis in a dose-dependent fashion. An optimum concentration for each compound was determined beyond which inhibition was observed. T...