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Impaired Mineral Ion Metabolism in a Mouse Model of Targeted Calcium-Sensing Receptor (CaSR) Deletion from Vascular Smooth Muscle Cells

Martin Schepelmann (group Enikö Kallay) and national and international colleagues and collaborators have just published a study in the Journal of the American Society of Nephrology (JASN), one of the highest ranked and most...[more]

 

Vaccine based on folded RBD-PreS fusion protein with potential to induce sterilizing immunity to SARS-CoV-2 variants

The preclinical data for a vaccine developed at MedUni Vienna to protect against SARS-CoV-2 indicates that it is effective against all SARS-CoV-2 variants known to date, including omicron - even in those who have not yet built up...[more]

 

Birch pollen allergic patients have IgE and IgG antibodies binding to diverse patterns of conformational epitopes on the major allergen, Bet v 1

Schmalz S, Mayr V, Shosherova A, Gepp B, Ackerbauer D, Sturm G, Bohle B, Breiteneder H, Radauer C. Isotype-specific binding patterns of serum antibodies to multiple conformational epitopes of Bet v 1.[more]

 

Neutralization of SARS-CoV-2 requires antibodies against conformational receptor-binding domain epitopes.

Gattinger P, Niespodziana K, Stiasny K, Sahanic S, Tulaeva I, Borochova K, Dorofeeva Y, Schlederer T, Sonnweber T, Hofer G, Kiss R, Kratzer B, Trapin D, Tauber PA, Rottal A, Körmöczi U, Feichter M, Weber M, Focke-Tejkl M,...[more]

 

Stereo-Specific Modulation of the Extracellular Calcium-Sensing Receptor in Colon Cancer Cells

Martin Schepelmann, Nadja Kupper, Marta Sladczyk, Bethan Mansfield, Teresa Manhardt, Karina Piatek, Luca Iamartino, Daniela Riccardi, Benson M. Kariuki, Marcella Bassetto, and Enikö Kallay Stereo-Specific Modulation of the...[more]

 

Amirreza Mahbod, Post-Doc in the group of Isabella Ellinger, has achieved PLACE 1 in the leaderboard of the MICCAI 2021 Foot Ulcer Segmentation Challenge.

Foot ulcer is a common complication of diabetes mellitus; it is associated with substantial morbidity and mortality and remains a major risk factor for lower leg amputation. Extracting accurate morphological features from the...[more]

 

AID/APOBECs among important factors in body’s defence against SARS-CoV-2

Research team comprising Anastasia Meshcheryakova, Diana Mechtcheriakova and Peter Pietschmann from the Institute of Pathophysiology and Allergy Research has addressed the potential interrelations between AID/APOBECs and the...[more]

 
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Inhaltsbereich

Neutralization of SARS-CoV-2 requires antibodies against conformational receptor-binding domain epitopes.

Gattinger P, Niespodziana K, Stiasny K, Sahanic S, Tulaeva I, Borochova K, Dorofeeva Y, Schlederer T, Sonnweber T, Hofer G, Kiss R, Kratzer B, Trapin D, Tauber PA, Rottal A, Körmöczi U, Feichter M, Weber M, Focke-Tejkl M, Löffler-Ragg J, Mühl B, Kropfmüller A, Keller W, Stolz F, Henning R, Tancevski I, Puchhammer-Stöckl E, Pickl WF, Valenta R. Allergy. 2021 Aug 28. doi: 10.1111/all.15066. Online ahead of print.

 

The determinants of successful humoral immune response to the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are of critical importance for the design of effective vaccines and the evaluation of the degree of protective immunity conferred by exposure to the virus. In this study, we analysed the SARS-CoV-2 polyclonal antibody response in a large population of clinically well-characterized patients after mild and severe COVID-19 using a panel of microarrayed structurally folded and unfolded SARS-CoV-2 proteins, as well as sequential peptides, spanning the surface spike protein (S) and the receptor-binding domain (RBD) of the virus. Specific antibody responses were directed against structurally folded S and RBD and three distinct peptide epitopes in S2. The virus-neutralization activity of patients´ sera was highly correlated with IgG antibodies specific for conformational but not sequential RBD epitopes and their ability to prevent RBD binding to its human receptor angiotensin-converting enzyme 2 (ACE2). Twenty percent of patients selectively lacked RBD-specific IgG. Only immunisation with folded, but not with unfolded RBD, induced antibodies against conformational epitopes with high virus-neutralizing activity. Conformational RBD epitopes required for protection do not seem to be altered in the currently emerging virus variants. These results are fundamental for estimating the protective activity of antibody responses after natural infection or vaccination and for the design of vaccines, which can induce high levels of SARS-CoV-2-neutralizing antibodies conferring sterilizing immunity.

https://onlinelibrary.wiley.com/doi/10.1111/all.15066

 

 
 
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