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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]

 

"Imaging Modalities for Biological and Preclinical Research: A Compendium", with unique, comprehensive collection of about 100 state-of-the-art imaging technologies.

Anastasia Meshcheryakova, Felicitas Mungenast and Diana Mechtcheriakova (Research Group Molecular Systems Biology and Pathophysiology, Department of Pathophysiology and Allergy Research, Medical University of Vienna) – experts in...[more]

 

IgE-cross-blocking antibodies to Fagales following sublingual immunotherapy with recombinant Bet v 1

João Rodrigues Grilo, Claudia Kitzmüller, Lorenz Aglas, Gabriela Sánchez Acosta, Ute Vollmann, Christof Ebner, Fritz Horak, Tamar Kinaciyan, Christian Radauer, Fatima Ferreira, Beatrice Jahn-Schmid, and Barbara Bohle Allergy....[more]

 

Amino Acid Transporter LAT1 (SLC7A5) Mediates MeHg-Induced Oxidative Stress Defense in the Human Placental Cell Line HTR-8/SVneo.

Granitzer S, Widhalm R, Forsthuber M, Ellinger I, Desoye G, Hengstschläger M, Zeisler H, Salzer H, Gundacker C. Amino Acid Transporter LAT1 (SLC7A5) Mediates MeHg-Induced Oxidative Stress Defense in the Human Placental Cell...[more]

 

The Immune Phenotype of Isolated Lymphoid Structures in Non-Tumorous Colon Mucosa Encrypts the Information on Pathobiology of Metastatic Colorectal Cancer

The gut-associated lymphoid tissue represents an integral part of the immune system. Among the powerful players of the mucosa-associated lymphoid tissue are isolated lymphoid structures, ILSs. Additionally, in the course of...[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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