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Università della Svizzera italiana

Identification and structure of a multidonor class of head-directed influenza-neutralizing antibodies reveal the mechanism for its recurrent elicitation

Sao-Fong Cheung, Crystal ; Fruehwirth, Alexander ; Paparoditis, Philipp Carl Georg ; Shen, Chen-Hsiang ; Foglierini, Mathilde ; Joyce, M. Gordon ; Leung, Kwanyee ; Piccoli, Luca ; Rawi, Reda ; Silacci-Fregni, Chiara ; Tsybovsky, Yaroslav ; Verardi, Raffaello ; Wang, Lingshu ; Wang, Shuishu ; Yang, Eun Sung ; Zhang, Baoshan ; Zhang, Yi ; Chuang, Gwo-Yu ; Corti, Davide ; Mascola, John R. ; Shapiro, Lawrence ; Kwong, Peter D. ; Lanzavecchia, Antonio ; Zhou, Tongqing

In: Cell reports, 2020, vol. 32, no. 9, p. 12 p

Multidonor antibodies are of interest for vaccine design because they can in principle be elicited in the general population by a common set of immunogens. For influenza, multidonor antibodies have been observed against the hemagglutinin (HA) stem, but not the immunodominant HA head. Here, we identify and characterize a multidonor antibody class (LPAF-a class) targeting the HA head. This class...

Université de Fribourg

Coronavirus infections in children including covid-19: an overview of the epidemiology, clinical features, diagnosis, treatment and prevention options in children

Petra, Zimmermann ; Nigel, Curtis

In: The Pediatric Infectious Disease Journal, 2020, vol. 39, no. 5, p. 355–368

Coronaviruses (CoVs) are a large family of enveloped, single-stranded, zoonotic RNA viruses. Four CoVs commonly circulate among humans: HCoV2-229E, -HKU1, -NL63 and -OC43. However, CoVs can rapidly mutate and recombine leading to novel CoVs that can spread from animals to humans. The novel CoVs severe acute respiratory syndrome coronavirus (SARS-CoV) emerged in 2002 and Middle East...

Université de Fribourg

The immunomodulatory effects of macrolides - a systematic review of the underlying mechanisms

Zimmermann, Petra ; Ziesenitz, Victoria C. ; Curtis, Nigel ; Ritz, Nicole

In: Frontiers in Immunology, 2018, vol. 9, p. -

The mechanisms underlying the non-antimicrobial immunomodulatory properties of macrolides are not well understood.Objectives: To systematically review the evidence for the immunomodulatory properties of macrolides in humans and to describe the underlying mechanism and extent of their influence on the innate and adaptive immune system.Methods: A systematic literature search was done in MEDLINE...

Université de Fribourg

The effect of maternal immunisation during pregnancy on infant vaccine responses

Zimmermann, Petra ; Perrett, Kirsten P. ; Messina, Nicole L. ; Donatha, Susan ; Ritz, Nicole ; Klis, Fiona R. M. van der ; Curtis, Nigel

In: EClinicalMedicine, 2019, vol. 13, p. 21–30

Immunisation during pregnancy to protect infants against tetanus, pertussis and influenza is recommended in many countries. However, maternal antibodies can interfere with infant vaccine responses. We investigated the effect of antenatal diphtheria-tetanus-acellular pertussis (dTpa) and trivalent inactivated influenza (TIV) immunisation on specific and heterologous antibody responses to...

Université de Fribourg

Antimicrobial effects of antipyretics

Zimmermann, Petra ; Curtis, Nigel

In: Antimicrobial Agents and Chemotherapy, 2017, vol. 61, no. 4, p. -

Antipyretics are some of the most commonly used drugs. Since they are often coadministered with antimicrobial therapy, it is important to understand the interactions between these two classes of drugs. Our review is the first to summarize the antimicrobial effects of antipyretic drugs and the underlying mechanisms involved. Antipyretics can inhibit virus replication, inhibit or promote...

Université de Fribourg

Biological sex influences antibody responses to routine vaccinations in the first year of life

Zimmermann, Petra ; Perrett, Kirsten P. ; Ritz,  Nicole ; Flanagan, Katie L. ; Robins-Browne, Roy ; Klis, Fiona R. M. van der ; Curtis, Nigel ; the MIS BAIR group

In: Acta Paediatrica, 2019, p. -

Aim We investigated the effect of early-life factors, namely sex, delivery mode, feeding method and antibiotic exposure, on antibody responses to routine vaccinations administered during the first year of life. Methods One and seven months after the primary course of routine vaccines and 1 month after routine vaccines at 12 months of age, antibodies against 26 vaccine antigens were measured...

Université de Fribourg

Large-scale analysis of the mycoplasma bovis genome identified non-essential, adhesion- and virulence-related genes

Josi, Christoph ; Bürki, Sibylle ; Vidal, Sara ; Dordet-Frisoni, Emilie ; Citti, Christine ; Falquet, Laurent ; Pilo, Paola

In: Frontiers in Microbiology, 2019, vol. 10, p. -

Mycoplasma bovis is an important pathogen of cattle causing bovine mycoplasmosis. Clinical manifestations are numerous, but pneumonia, mastitis, and arthritis cases are mainly reported. Currently, no efficient vaccine is available and antibiotic treatments are not always satisfactory. The design of new, efficient prophylactic and therapeutic approaches requires a better understanding of the...

Università della Svizzera italiana

Adjuvants and the vaccine response to the DS-Cav1-stabilized fusion glycoprotein of respiratory syncytial virus

Sastry, Mallika ; Zhang, Baoshan ; Chen, Man ; Joyce, M. Gordon ; Kong, Wing-Pui ; Chuang, Gwo-Yu ; Ko, Kiyoon ; Kumar, Azad ; Silacci, Chiara ; Thom, Michelle ; Salazar, Andres M. ; Corti, Davide ; Lanzavecchia, Antonio ; Taylor, Geraldine ; Mascola, John R. ; Graham, Barney S. ; Kwong, Peter D.

In: Plos one, 2017, vol. 12, no. 10, p. e0186854

Appropriate adjuvant selection may be essential to optimize the potency and to tailor the immune response of subunit vaccines. To induce protective responses against respiratory syncytial virus (RSV)—a highly prevalent childhood pathogen without a licensed vaccine—we previously engineered a pre-fusion-stabilized trimeric RSV F (pre-F) “DS-Cav1” immunogen, which induced high titer...

Università della Svizzera italiana

Protection of calves by a prefusion-stabilized bovine RSV F vaccine

Zhang, Baoshan ; Chen, Lei ; Silacci, Chiara ; Thom, Michelle ; Boyington, Jeffrey C. ; Druz, Aliaksandr ; Joyce, M. Gordon ; Guzman, Efrain ; Kong, Wing-Pui ; Lai, Yen-Ting ; Stewart-Jones, Guillaume B. E. ; Tsybovsky, Yaroslav ; Yang, Yongping ; Zhou, Tongqing ; Baxa, Ulrich ; Mascola, John R. ; Corti, Davide ; Lanzavecchia, Antonio ; Taylor, Geraldine ; Kwong, Peter D.

In: Npj vaccines, 2017, vol. 2, p. 7

Bovine respiratory syncytial virus, a major cause of respiratory disease in calves, is closely related to human RSV, a leading cause of respiratory disease in infants. Recently, promising human RSV-vaccine candidates have been engineered that stabilize the metastable fusion (F) glycoprotein in its prefusion state; however, the absence of a relevant animal model for human RSV has complicated...