Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2025
Forfattere
Ya-Lan Hong Wei-Ming Xi Ya-Ting Wang Yi Yuan Zong-Zhuan Shen Ming Tian Jihong Liu Clarke Wang-Ying Xie Fang-jie ZhaoSammendrag
Environmental transmission of antibiotic resistance poses a significant threat to human health by undermining the efficacy of therapeutic interventions against bacterial infections. Agricultural practices, particularly the application of organic fertilizers derived from animal manure, are major contributors to the spread of antibiotic resistance determinants (ARDs) in soil ecosystems. However, the fates of ARDs and their bacterial hosts in soil following organic fertilization as well as the impact of water management regimes remain poorly understood. We investigated the attenuation and persistence of ARDs in soil following organic fertilization under water management practices of upland, continuous flooding, and intermittent flooding. Most ARDs introduced via the organic fertilizer exhibited significant attenuation, with half-lives ranging from 19 to 50 days, primarily due to the decline of fertilizer-derived bacterial hosts. Specific ARDs, such as aph(3’)-IIIa and tetO, persisted across all treatments. Upland conditions accelerated the attenuation of ARDs and their pathogenic hosts compared to f looding conditions, which prolonged their survival and promoted horizontal gene transfer. The divergent responses of ARD composition and soil bacterial communities to the environmental variables revealed a unique dissemination pattern, wherein the soil co-occurring bacterial communities served as critical hubs for the dissemination of ARDs and their bacterial hosts from organic fertilizers. The soil co-occurring bacterial communities exhibited strong interspecies interactions and high sensitivity to environmental changes. Targeted strategies to disrupt these assembly hubs may provide an effective way to mitigate the spread of antibiotic resistance from organic fertilizers to soil ecosystems.
Forfattere
Erik J. JonerSammendrag
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Forfattere
Ana-Maria Pantazica Alexander Hammel Iuliana Caras Irina Ionescu Catalin Tucureanu Adrian Onu Maria Murace Jihong Liu Clarke Crina Stavaru Norica Branza-Nichita Ralph BockSammendrag
Microalgae represent promising production factories for the light-driven, cost-effective production of recombinant proteins. The red microalga Porphyridium purpureum displays particularly favourable transgene expression properties due to the episomal maintenance of transformation vectors at high copy numbers in the nucleus. In this work, we explored the potential of Porphyridium purpureum to synthesise a candidate vaccine against Hepatitis B virus (HBV). We show high-yield expression of an HBV chimeric surface antigen and efficient assembly of virus-like particles (VLPs) in algal cells. We established a purification protocol for the VLPs and conducted vaccination studies in experimental animals. The results demonstrate that the alga-produced HBV antigen elicits superior humoral and cellular immune responses compared to a commercial HBV vaccine produced in yeast. The antigen triggers virus-neutralising antibodies against different HBV variants, including vaccine-escape mutations that evade the immune response to current vaccines in humans. Our work establishes Porphyridium as a highly promising production platform for vaccines and other proteinaceous biopharmaceuticals.
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