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Infectious Disease: Influenza
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New insights into the neuraminidase-mediated hemagglutination activity of influenza A(H3N2) viruses
In this study, we examined the effect of natural amino acid polymorphism at position 150 on NA-mediated hemagglutination. Using the A/Puerto Rico/8/34 backbone, we generated a comprehensive panel of recombinant A(H3N2) viruses that have different NAs but shared an HA that displays poor binding to red blood cells (RBCs). None of the tested substitutions at 150 (C, H, L, R, and S) promoted NA-binding. However, we identified two new determinants of NA-binding, Q136K and T439R, that emerged during virus culturing. Similar to T148I, both Q136K and T439R reduced NA enzyme activity by 48-86% and inhibition (14- to 173-fold) by th...
Source: Antiviral Research - September 17, 2023 Category: Virology Authors: Rongyuan Gao Philippe Noriel Q Pascua Ha T Nguyen Anton Chesnokov Chloe Champion Vasiliy P Mishin Dave E Wentworth Larisa V Gubareva Source Type: research
Baseline immune states (BIS) associated with vaccine responsiveness and factors that shape the BIS
Semin Immunol. 2023 Sep 15;70:101842. doi: 10.1016/j.smim.2023.101842. Online ahead of print.ABSTRACTVaccines are among the greatest inventions in medicine, leading to the elimination or control of numerous diseases, including smallpox, polio, measles, rubella, and, most recently, COVID-19. Yet, the effectiveness of vaccines varies among individuals. In fact, while some recipients mount a robust response to vaccination that protects them from the disease, others fail to respond. Multiple clinical and epidemiological factors contribute to this heterogeneity in responsiveness. Systems immunology studies fueled by advances in...
Source: Seminars in Immunology - September 17, 2023 Category: Allergy & Immunology Authors: Djamel Nehar-Belaid Mark Sokolowski Sathyabaarathi Ravichandran Jacques Banchereau Damien Chaussabel Duygu Ucar Source Type: research
New insights into the neuraminidase-mediated hemagglutination activity of influenza A(H3N2) viruses
In this study, we examined the effect of natural amino acid polymorphism at position 150 on NA-mediated hemagglutination. Using the A/Puerto Rico/8/34 backbone, we generated a comprehensive panel of recombinant A(H3N2) viruses that have different NAs but shared an HA that displays poor binding to red blood cells (RBCs). None of the tested substitutions at 150 (C, H, L, R, and S) promoted NA-binding. However, we identified two new determinants of NA-binding, Q136K and T439R, that emerged during virus culturing. Similar to T148I, both Q136K and T439R reduced NA enzyme activity by 48-86% and inhibition (14- to 173-fold) by th...
Source: Antiviral Research - September 17, 2023 Category: Virology Authors: Rongyuan Gao Philippe Noriel Q Pascua Ha T Nguyen Anton Chesnokov Chloe Champion Vasiliy P Mishin Dave E Wentworth Larisa V Gubareva Source Type: research
Baseline immune states (BIS) associated with vaccine responsiveness and factors that shape the BIS
Semin Immunol. 2023 Sep 15;70:101842. doi: 10.1016/j.smim.2023.101842. Online ahead of print.ABSTRACTVaccines are among the greatest inventions in medicine, leading to the elimination or control of numerous diseases, including smallpox, polio, measles, rubella, and, most recently, COVID-19. Yet, the effectiveness of vaccines varies among individuals. In fact, while some recipients mount a robust response to vaccination that protects them from the disease, others fail to respond. Multiple clinical and epidemiological factors contribute to this heterogeneity in responsiveness. Systems immunology studies fueled by advances in...
Source: Seminars in Immunology - September 17, 2023 Category: Allergy & Immunology Authors: Djamel Nehar-Belaid Mark Sokolowski Sathyabaarathi Ravichandran Jacques Banchereau Damien Chaussabel Duygu Ucar Source Type: research
Salmonella delivers H9N2 influenza virus antigens via a prokaryotic and eukaryotic dual-expression vector and elicits bivalent protection against avian influenza and fowl typhoid
Dev Comp Immunol. 2023 Sep 13:105058. doi: 10.1016/j.dci.2023.105058. Online ahead of print.ABSTRACTThe H9N2 avian influenza virus significantly affects the health of poultry and humans. We identified a prokaryotic and eukaryotic dual-expression vector system, pJHL270, that can provide simultaneous MHC class I and II stimulation of the host immune system, and we designed vaccine antigens by selecting the consensus HA1 sequence and M2e antigens from H9N2 virus circulating in South Korea from 2000 to 2021. The genes were cloned into the pJHL270 vector, and the cloned plasmid was delivered by a live-attenuated Salmonella Gall...
Source: Developmental and Comparative Immunology - September 15, 2023 Category: Allergy & Immunology Authors: Chamith Hewawaduge Jun Kwon Chandran Sivasankar Ji-Young Park Amal Senevirathne John Hwa Lee Source Type: research
Methods for virus recovery from environmental surfaces to monitor infectious viral contamination
Environ Int. 2023 Sep 9;180:108199. doi: 10.1016/j.envint.2023.108199. Online ahead of print.ABSTRACTAccurate quantification of infectious contaminants on environmental surfaces, particularly infectious viruses, is essential for contact transmission risk assessment; however, difficulties in recovering viruses from surfaces using swabs complicates this quantification process. Herein, we identified the factors that significantly affected virus recovery rates and developed an ideal swab method that yielded the highest rate of virus recovery. We comprehensively analyzed the effects of swab type (cotton/polyester), swab water c...
Source: Environment International - September 15, 2023 Category: Environmental Health Authors: Hajime Miyazaki Ryohei Hirose Mikako Ichikawa Hiroki Mukai Katsuma Yamauchi Takaaki Nakaya Yoshito Itoh Source Type: research
Salmonella delivers H9N2 influenza virus antigens via a prokaryotic and eukaryotic dual-expression vector and elicits bivalent protection against avian influenza and fowl typhoid
Dev Comp Immunol. 2023 Sep 13:105058. doi: 10.1016/j.dci.2023.105058. Online ahead of print.ABSTRACTThe H9N2 avian influenza virus significantly affects the health of poultry and humans. We identified a prokaryotic and eukaryotic dual-expression vector system, pJHL270, that can provide simultaneous MHC class I and II stimulation of the host immune system, and we designed vaccine antigens by selecting the consensus HA1 sequence and M2e antigens from H9N2 virus circulating in South Korea from 2000 to 2021. The genes were cloned into the pJHL270 vector, and the cloned plasmid was delivered by a live-attenuated Salmonella Gall...
Source: Developmental and Comparative Immunology - September 15, 2023 Category: Allergy & Immunology Authors: Chamith Hewawaduge Jun Kwon Chandran Sivasankar Ji-Young Park Amal Senevirathne John Hwa Lee Source Type: research
Mentha pulegium: A Plant With Several Medicinal Properties
Endocr Metab Immune Disord Drug Targets. 2023 Sep 14. doi: 10.2174/1871530323666230914103731. Online ahead of print.ABSTRACTThe species Mentha pulegium L. (M. pulegium L.) belongs to the family Lamiaceae, native to Europe, North Africa, and the Middle East, and the genus Mentha. It has been traditionally used in food, cosmetics, and medicines. It is a perennial, fragrant, well-liked, herbaceous plant that can grow up to half a meter tall. It is extensively used as a food flavoring, particularly for Moroccan traditional drinks. Chewing mint and M. pulegium, a relaxing and refreshing plant, can be used to treat hiccups and a...
Source: Endocrine, Metabolic and Immune Disorders Drug Targets - September 15, 2023 Category: Endocrinology Authors: Smail Amtaghri Miloudia Slaoui Mohamed Eddouks Source Type: research
Association of vaccine-specific regulatory T cells with reduced antibody response to repeated influenza vaccination
This article is protected by copyright. All rights reserved.PMID:37713727 | DOI:10.1002/eji.202350525
Source: European Journal of Immunology - September 15, 2023 Category: Allergy & Immunology Authors: Pin-Hung Lin Po-Ju Hsiao Ching-Fu Pan Ming-Tsan Liu Jann-Tay Wang Chi Ching Fang-Yi Wu Yi-Hsuan Lin Yu-Chan Yang Le-Yin Hsu Hung-Chih Yang Un-In Wu Source Type: research
Methods for virus recovery from environmental surfaces to monitor infectious viral contamination
Environ Int. 2023 Sep 9;180:108199. doi: 10.1016/j.envint.2023.108199. Online ahead of print.ABSTRACTAccurate quantification of infectious contaminants on environmental surfaces, particularly infectious viruses, is essential for contact transmission risk assessment; however, difficulties in recovering viruses from surfaces using swabs complicates this quantification process. Herein, we identified the factors that significantly affected virus recovery rates and developed an ideal swab method that yielded the highest rate of virus recovery. We comprehensively analyzed the effects of swab type (cotton/polyester), swab water c...
Source: Environment International - September 15, 2023 Category: Environmental Health Authors: Hajime Miyazaki Ryohei Hirose Mikako Ichikawa Hiroki Mukai Katsuma Yamauchi Takaaki Nakaya Yoshito Itoh Source Type: research
Mentha pulegium: A Plant With Several Medicinal Properties
Endocr Metab Immune Disord Drug Targets. 2023 Sep 14. doi: 10.2174/1871530323666230914103731. Online ahead of print.ABSTRACTThe species Mentha pulegium L. (M. pulegium L.) belongs to the family Lamiaceae, native to Europe, North Africa, and the Middle East, and the genus Mentha. It has been traditionally used in food, cosmetics, and medicines. It is a perennial, fragrant, well-liked, herbaceous plant that can grow up to half a meter tall. It is extensively used as a food flavoring, particularly for Moroccan traditional drinks. Chewing mint and M. pulegium, a relaxing and refreshing plant, can be used to treat hiccups and a...
Source: Endocrine, Metabolic and Immune Disorders Drug Targets - September 15, 2023 Category: Endocrinology Authors: Smail Amtaghri Miloudia Slaoui Mohamed Eddouks Source Type: research
