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N-glycan profiling of the human serum glycoproteins including immunoglobulin fraction on different age groups of healthy persons shows substantial changes with increasing age in three major N-glycan structures. In individuals more than 40-50 years of age, there is an increase in under-galactosylated glycans and a decrease in the core alpha-1,6-fucosylated(More)
Biomarkers indicating biological age are of significant interest for prevention, diagnosis and monitoring (and the treatment) of age-related diseases. We previously reported an alteration of serum N-glycan profile in old humans using "DNA Sequencer Adapted-Fluorophore Assisted Carbohydrate Electrophoresis" (DSA-FACE). To validate the shift in serum N-glycan(More)
UNLABELLED We evaluated the use of blood serum N-glycan fingerprinting as a tool for the diagnosis of hepatocellular carcinoma (HCC) in patients with cirrhosis induced by hepatitis B virus (HBV). A group of 450 HBV-infected patients with liver fibrosis or cirrhosis with or without HCC were studied. HCC was diagnosed by alpha-fetoprotein (AFP) analysis,(More)
BACKGROUND AND AIMS There is a demand for serum markers that can routinely assess the progression of liver cancer. DENA (diethylnitrosamine), a hepatocarcinogen, is commonly used in an experimental mouse model to induce liver cancer that closely mimics a subclass of human hepatocellular carcinoma (HCC). However, blood monitoring of the progression of HCC in(More)
We developed a high-throughput functional genomic screening system that allows identification of genes prolonging life-span in the baker's yeast Saccharomyces cerevisiae. The method is based on isolating yeast mother cells with extended number of cell divisions as indicated by the increased number of bud scars on their surface. Fluorescently labelled Wheat(More)
BACKGROUND Glycosylation, i.e the enzymatic addition of oligosaccharides (or glycans) to proteins and lipids, known as glycosylation, is one of the most common co-/posttranslational modifications of proteins. Many important biological roles of glycoproteins are modulated by N-linked oligosaccharides. As glucose levels can affect the pathways leading to(More)
In this study, we used our recently developed screening method, Bud-Scar-based Screening (BSS), to screen a yeast cDNA expression library in an SGS1 deletion BY4742 yeast strain. One gene involved in a nonclassical export pathway, NCE102, was found to extend the life span of Deltasgs1 yeast. Deletion of NCE102 in a wild type yeast strain increased its(More)
We investigated whether blood N-glycan changes can be used as a diagnostic biomarker for Alzheimer disease (AD). We used DNA sequencer-assisted, fluorophore-assisted carbohydrate electrophoresis (DSA-FACE) technology to assay N-glycans in sera from 79 autopsy-confirmed dementia patients and 149 healthy controls. One N-glycan (NA2F) was substantially(More)
Ferritin is one of the major eukaryotic proteins involved in regulating iron metabolism and maintaining iron homeostasis. However, Saccaromyces cerevisiae is an exception, possessing no ferritin and using other means to store excess iron. The only potential iron storage protein identified in yeast so far is the homologue of human frataxin (YFH1p). In this(More)
BACKGROUND We previously reported on serum N-glycans as markers for the diagnosis of cirrhosis in patients with chronic hepatitis C infection. Our present study aimed to evaluate the use of serum glycan markers for the diagnosis of liver fibrosis in patients with chronic hepatitis B infection. METHODS Patients with hepatitis B virus (HBV) infection(More)