Zuzana Pakanova

• PhD
• Researcher at Slovak Academy of Sciences

We investigated the use of boron-doped diamond (BDD) with different surface morphologies for the enhanced detection of nine different peptides by matrix-assisted laser desorption/ionisation mass spectrometry (MALDI-MS). For the first time, we compared three different nanostructured BDD film morphologies (Continuous, Nanograss, and Nanotips) with di...

Background Aberrant glycosylation is a hallmark of cancer and thereby has an excellent potential for the discovery of novel biomarkers. Impairments in the glycan composition of lipoproteins impact their functional properties and can be associated with various diseases, including cancer. This research is still in its infancy; however, it can lead to...

Changes in protein glycosylation are associated with most biological processes, and the importance of glycomic analysis in the research of disorders is constantly increasing, including in the neurodevelopmental field. We glycoprofiled sera in 10 children with attention-deficit hyperactivity disorder (ADHD) and 10 matching healthy controls for 3 typ...

Background Alpha-mannosidosis is a rare lysosomal storage disorder, caused by decreased activity of α-D-mannosidase. This enzyme is involved in the hydrolysis of mannosidic linkages in N-linked oligosaccharides. Due to the mannosidase defect, undigested mannose-rich oligosaccharides (Man2GlcNAc - Man9GlcNAc) accumulating in cells are excreted in la...

Citation: Kodríková, R.; Pakanová, Z.; Krchňák, M.; Šedivá, M.; Šesták, S.; Květoň, F.; Beke, G.; Šalingová, A.; Skalická, K.; Brennerová, K.; et al. N-Glycoprofiling of SLC35A2-CDG: Patient with a Novel Hemizygous Variant. Biomedicines 2023, 11, 580. Abstract: Congenital disorders of glycosylation (CDG) are a group of rare inherited metabolic diso...

Abstract Mucopolysaccharidosis IIIA (MPS IIIA) is a lysosomal storage disorder (LSD) caused by deficiency of lysosomal N-sulphoglucosamine sulphohydrolase, which is one of four enzymes involved in heparan sulfate degradation. Traditional methods used for MPS IIIA diagnostics usually constitute of selective screening, based on the analysis of urinar...

In this study, we applied MXene as column cartridge for N-glycan enrichment from human samples with a focus on the analysis of sialic acid linkages using a derivatisation protocol followed by glycan analysis via Matrix Assisted Laser Desorption Ionisation-Time Of Flight Mass Spectrometry (MALDI-TOF-MS). The MXene-based cartridge enriches a higher n...

Cholera is a life-threatening diarrhoeal disease caused by ingestion of Vibrio cholerae. There are at least 200 serogroups of V. cholerae but only two of them are causing epidemics – O1 and O139 serogroups. Fragmentation analysis of O-antigen, also known as O-specific polysaccharide (OSP), from lipopolysaccharide (LPS) is important to obtain new in...

Increasing the production of recombinant antibodies while ensuring high and stable protein quality remains a challenge in mammalian cell culture. This review is devoted to advances in the field of obtaining stable and optimal glycosylation of therapeutic antibodies based on IgA, as well as the subsequent issues of glycosylation control of glycoprot...

Lysosomal storage disorders (LSD) are a group of over 70 rare inherited metabolic disorders that are caused mostly by the deficiency of specific lysosomal enzymes. Lack of these enzymes leads to the interference with cellular functions due to excessive accumulation of undegraded substrate in cells and tissues. Effective treatment of these diseases,...

Congenital disorder of glycosylation type Ig (ALG12-CDG) is a rare inherited metabolic disease caused by a defect in alpha-mannosyltransferase 8, encoded by the ALG12 gene (22q13.33). To date, only 15 patients have been diagnosed with ALG12-CDG globally. Due to a newborn Slovak patient's clinical and biochemical abnormalities, the isoelectric focus...

The ferroxidase ceruloplasmin (CP) plays a crucial role in iron homeostasis in vertebrates together with the iron exporter ferroportin. Mutations in the CP gene give rise to aceruloplasminemia, a rare neurodegenerative disease for which no cure is available. Many aspects of the (patho)physiology of CP are still unclear and would benefit from the av...

Significance The cell envelope of Mycobacterium tuberculosis serves as a primary protective barrier of the pathogen, which claims more than a million lives each year. Its basis, the unique mycobacterial cell wall core, is composed of covalently linked peptidoglycan, branched heteropolysaccharide arabinogalactan, and mycolic acids. Construction of t...

Aim: Congenital disorders of glycosylation (CDG) belong to an expanding group of rare genetic metabolic disorders caused by defects in the complex chemical enzymatic process of glycosylation. The study is aimed at presenting a case report of a premature dysmorphic newborn, clinical presentation of the condition, the way it was diagnosed and treate...

Mr 97 66 45 30 20.1 St. HvXET3 HvXET4 HvXET6 Supplemental Figure S1. SDS-PAGE profiles of HvXET3, HvXET4, and HvXET6 purified by Immobilized Metal Affinity Chromatography. Protein loadings in lane 2 (15 μg), lane 3 (20 μg), and lane 4 (2 μg) were quantified by the QubitTM assay and visualised by Coomassie Brilliant Blue. Molecular masses of standar...

Another building block in the plant cell wall: Barley xyloglucan xyloglucosyl transferases link covalently xyloglucan and anionic oligosaccharides derived from pectin SUMMARY We report on the homo-and hetero-transglycosylation activities of the HvXET3 and HvXET4 xyloglucan xyloglucosyl transferases (XET; EC 2.4.1.207) from barley (Hordeum vulgare L...

We report on the homo‐ and hetero‐transglycosylation activities of the HvXET3 and HvXET4 xyloglucan xyloglucosyl transferases (XET; EC 2.4.1.207) from barley (Hordeum vulgare L.), and the visualisation of these activities in young barley roots using Alexa Fluor 488‐labelled oligosaccharides. We discover that these isozymes catalyse the transglycosy...

Glycosylation of therapeutic glycoproteins significantly affects their physico-chemical properties, bioactivity and immunogenicity. The determination of glycan composition is highly important regarding their development and production. Therefore, there is a demand for analytical techniques enabling rapid and reliable glycoprofiling of therapeutic p...

Inherited metabolic disorders of glycoconjugate metabolism include congenital disorders of glycosylation (CDG) - disorders in biosynthesis of glycoconjugates; and some of the lysosomal storage diseases (LSD) - disorders of their degradation. This review summarizes the brief characteristics of metabolic pathways of synthesis and catabolism of glycoc...

Colorectal Cancer (CRC) represents the fourth most common cause of cancer mortality as reported by the World Health Organization. Changes in the glycosylation pattern results in the production of tumor-associated glycans or glycoproteins, they can be secreted into the blood stream and therefore they can be used as glycobiomarkers. Serum alpha-fetop...

Due to the lack of the acid 1,4-α-glucosidase, the urine of Pompe patients contains increased levels of specific glucose tetrasaccharide αGlc(1 → 6)αGlc(1 → 4)αGlc(1 → 4)Glc (Glc4), which was approved as a non-invasive biomarker of glycogen accumulation in the muscles of Pompe patients. MALDI-TOF mass spectrometry and ¹H NMR spectroscopy were used...

Introduction: Apolipoprotein C-III (ApoC-III) is a mostly liver-derived serum O-glycoprotein, which is used, along with an N-glycoprotein transferrin (TF), as a marker in the biochemical screening for congenital disorders of glycosylation (CDG). However, it is increasingly evident that secondary glycosylation abnormalities might occur in other, no...

Background The brain stem contains important nuclei that control cardiovascular function via the sympathetic nervous system (SNS), which is strongly influenced by nitric oxide. Its biological activity is also largely determined by oxygen free radicals. Despite many experimental studies, the role of AT1R-NAD(P)H oxidase-superoxide pathway in NO-defi...

DOI: 10.1002/pmic.201500463 Mass spectrometry analysis of different linkages sialic acid is attached to the glycan backbone is a daunting task requiring derivatisation steps. In this work we applied lectins specifically recognizing either α-(2,3)- or α-(2,6)-linked terminal sialic acid for specific glycoprofiling of a prostate specific antigen (a p...

The construction of a sensitive electrochemical lectin-based immunosensor for detection of a prostate specific antigen (PSA) is shown here. Three lectins with different carbohydrate specificities were used in this study to glycoprofile PSA, which is the most common biomarker for prostate cancer (PCa) diagnosis. The biosensor showed presence of α-L-...

Modern glycan analysis is primarily based on mass spectrometry, where instruments based on electrospray or matrix-assisted laser desorption ionization are currently the most frequently used. In the present study, electrospray ionization (ESI) coupled with a high-resolution Fourier transform mass spectrometer (LTQ Orbitrap) and matrix-assisted laser...

Pompe disease, glycosomal storage disorder type II, is caused by a deficiency of lysosomal exo-α- 1,4-glucosidase, which participates in glycogen degradation. Due to the wide variety of its clinical symptoms, this lysosomal storage disorder is difficult to diagnose. The “gold standard” diagnosis of Pompe disease is based on an enzyme activity analy...