BACKGROUND Ethical and regulatory guidance on the collection and use of human biospecimens (HBS) for research forms an essential component of national health systems in Sub-Saharan Africa (SSA), where rapid advances in genetic- and genomic-based technologies are fueling clinical trials involving HBS and the establishment of large-scale biobanks. METHODS An extensive multi-level search for pub...

Recently, it was suggested that maternal hepatitis B surface antigen antibodies (anti-HBs) acquired transplacentally could play a negative role in newborn infants' immune response to the hepatitis B vaccine. We compared the hepatitis B virus (HBV) vaccine response in infants born to mothers previously vaccinated against HBV (n = 91) to infants born to mothers who were not previously vaccinated ...

BACKGROUND The epidemiological impact and the duration of protection provided by infant hepatitis B (HB) vaccination are unknown. OBJECTIVES This study was designed to determine the hepatitis B virus (HBV) infection seromarkers in young adults who have been vaccinated against HBV as the first group of Iranian neonates during 1993 and 1994. PATIENTS AND METHODS We recruited 510 young adults ...

The intracellular polymerization of deoxy-sickle cell hemoglobin (HbS) has been identified as the main cause of sickle cell disease. Therefore, the material properties and biomechanical behavior of polymerized HbS fibers is a topic of intense research interest. A solvent-free coarse-grain molecular dynamics (CGMD) model is developed to represent a single hemoglobin fiber as four tightly bonded ...

The use of recombinant Hb has provided the advantage that any amino acid substitution can be made at sites not represented by natural mutants or that cannot be modified by chemical procedures. We have recently reported the expression of human sickle Hb (HbS) in the yeast Saccharomyces cerevisiae that carries a plasmid containing the human alpha- and beta-globin cDNA sequences; N-terminal nascen...

The inherited diseases of hemoglobin have remarkable phenotypic variability because of genetic modifiers necessitating medical intervention at various stages of disease. Genotype–phenotype relationship is crucial in this regard. So three year retrospective study of biochemical pattern of Hemoglobinopathies and Thalassemias and their clinical manifestations was done in a cohort of 689 patients i...

Hepatitis B remains a global burden, with estimated 15 to 40 percents of infected individuals eventually suffer from liver cirrhosis, liver failure, and hepatocellular carcinoma. Vaccination aims to form anti-HBs antibody with protective titer to prevent infection. CD4 T cell lymphocytes are known to play a major role in establishing immunity after vaccination. This study aimed to investigate p...

Coexistence of hepatitis B surface antigen (HBsAg) and antibody against HBsAg (anti-HBs) comprises an atypical serological profile in patients with chronic hepatitis B virus (HBV) infection. In this study, in total 94 patients with coexisting HBsAg and anti-HBs and 94 age- and sex-matched patients with positive HBsAg were characterized by quantitatively measuring HBsAg and HBV DNA, sequencing l...

Healthcare workers are at high risk of blood borne infections especially Hepatitis B virus (HBV), Hepatitis C virus (HCV) and human immunodeficiency virus (HIV). Such an infection may progress to serious consequences. The aim of this study was to determine the prevalence of HBV, HCV and HIV in all health workers in departments of Surgery in Azadi teaching hospital in Duhok. Anti-HBs antibody po...

UNLABELLED Cross-sectional study conducted among workers of the Family Health Strategy Montes Claros. OBJECTIVE To investigate the report of vaccination against Hepatitis B, verification of immunization and the factors associated with dosages of anti-HBs. METHOD We collected blood samples from those reported that they had one or more doses of the vaccine. We evaluated the association of the...