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Des chercheurs ont trouvé des microparticules de plastique dans le bulbe olfactif de patients décédés. Présents partout dans notre environnement, ils pourraient y entrer par simple inhalation. Les microplastiques sont omniprésents dans l'environnement (jusqu'au sommet de l'Everest), et de nombreuses études en ont retrouvé dans différents organes du corps humain. Elles pourraient même se frayer un chemin [...]

A peptide synthesized by researchers at the University of São Paulo (USP) in Brazil protected human lung cells against infection by SARS-CoV-2 in the laboratory and eliminated the inflammation caused by the virus in mice susceptible to COVID-19. Development of the peptide was inspired by the protein ACE2, the human cell's natural receptor for SARS-CoV-2. An article describing the research is published in the journal Antiviral Research. As noted by the authors, the results point to [...]

Most flowering plants depend on animals for pollination. In warm wet tropical regions, more than 90% of plant species are pollinated by animals. In Dominica, a Caribbean island country, researchers have identified a mutualistic relationship between two species of heliconia plant (Heliconia bihai and H. caribaea) and their hummingbird pollinator, the Purple-throated carib (Eulampis jugularis). The association is so specific that it has often been cited as an example in the scientific [...]

Study finds plant-based diets are adequate but often rely on processed products. A recent study from the University of São Paulo has found that vegans generally consume enough protein and essential amino acids through their diets, but some rely on processed foods like protein supplements to meet their needs. This research, published in JAMA Network Open, involved 774 men and women who follow a vegan diet. The study revealed that the participants mainly ate unprocessed or [...]

A study led by Brazilian researchers and reported in an article published in the journal Nature Communications proposes that simultaneously targeting the enzyme glutaminase and the protein HuR, both of which are essential to tumor progression, may be effective in treating breast cancer. The metabolic requirements of tumor cells are associated with high levels of glutamine consumption to produce energy. The first step is conversion of glutamine to glutamate catalyzed by [...]

A study led by Brazilian researchers and reported in an article published in the journal Nature Communications proposes that simultaneously targeting the enzyme glutaminase and the protein HuR, both of which are essential to tumor progression, may be effective in treating breast cancer. The metabolic requirements of tumor cells are associated with high levels of glutamine consumption to produce energy. The first step is conversion of glutamine to glutamate catalyzed by [...]

Genomic surveillance of the evolving SARS-CoV-2 virus has been essential for managing the COVID-19 pandemic, helping researchers identify new variants, track their circulation, and create new vaccines that target the most common emerging variants. The same approach is applied when developing annual flu shots. This work, however, requires a structured naming system for new variants so that everyone studying and tracking viruses can be on the same page, speaking the same language. To date, [...]

Bacteria that live in soil and help roots fix nitrogen can boost certain plants' capacity to reproduce, according to an article published in the American Journal of Botany describing a study of this mechanism in Chamaecrista latistipula, a legume belonging to the Fabaceae family, which includes beans and peas. Bacteria in the soil enhance the attractiveness of the plant's flowers to pollinators via a type of relationship known as mutualism that is widespread in plants and [...]

As it prepares to host the 30th Conference of the Parties to the United Nations Framework Convention on Climate Change (UNFCCC COP 30, the first COP to be held in the Amazon) in November 2025, Brazil is at a crucial moment. Its greenhouse gas emission reduction targets are still within reach, but socioenvironmental actions and policies focusing on conserving or restoring forests and biomes need to be strengthened. This is one of the key points made by Brazilian scientists in an [...]