A Brazilian research team has identified a key gene responsible for the virulence of Aspergillus fumigatus, a fungus that causes severe lung infections. By silencing this gene, the researchers found that the fungus became less virulent and more susceptible to existing medications.
A study analyzing 47 fatal COVID-19 cases reveals two distinct disease pathways: one characterized by high viral load and low inflammation, the other by exacerbated lung inflammation. The findings suggest that understanding these molecular mechanisms can inform treatment decisions for critical cases.
Researchers at Tecnolat have identified three Lactobacillus strains with probiotic properties, safe for consumption, and beneficial to human health. These strains can also enhance the sensory diversity and microbiological quality of traditional Brazilian cheeses.
A study found that Brazilian women are giving birth too early, impairing the health of their babies, due to manipulation of birth timing around Carnival. Preterm deliveries via cesarean section lead to reduced gestational age and birth weight, especially in high-risk pregnancies.
Scientists at the University of São Paulo found that converting degraded land to climate-smart agricultural practices can significantly reduce greenhouse gas emissions in Brazil. The study highlights the need for more data and research opportunities to support the development of carbon markets and green finance mechanisms.
A study in Current Biology mapped a brain circuit responsible for detecting threats and forming fear memories. The hippocampus and subiculum are key structures involved, with the subiculum transferring information to the hypothalamus.
A study of over 900 children with autism spectrum disorder found that brain overgrowth is associated with increased social and communication symptoms. The research used MRI brain images and mini-brain experiments to show that enlarged brains are linked to altered Ndel1 enzyme activity, potentially affecting brain development.
SARS-CoV-2 uses machinery of defense cells to induce expression of unproductive isoforms of key antiviral genes, disrupting normal protein production and immune response. The study provides fundamental information on potential targets for antiviral medications and immunomodulatory interventions.
A study at UFSCar found that remote testing can be reliable for functional mobility and muscle strength, especially for those with dementia. This new methodology enables more frequent health sessions and better patient tracking.
Researchers found a Leishmania amazonensis strain resistant to amphotericin B, a widely used treatment for cutaneous leishmaniasis. The study highlights the urgent need for alternative drugs to combat the disease, which affects over 15,000 people in Brazil annually.
A study by researchers at São Paulo State University found that dopaminergic medication levodopa improves sleep quality in Parkinson's disease patients. The number of times patients woke up during the night fell by 25% and the amount of time they remained awake fell 30% on average.
Researchers have developed a chip-based quantum system that can detect unauthorized access in quantum communication, using entangled four-photon states. This technology has the potential to strengthen data security and protect sensitive information from cyber threats.
A study in São Paulo state found that peer-to-peer certified organic farms had an average of 58.8 organic items, while conventionally certified farms had only 22.2. This greater diversity includes native and medicinal species, contributing to a more sustainable and biodiverse organic farming system.
A group of scientists discovered that the Black and white tegu lizard can raise its own body temperature during the reproductive season, even in a dark burrow. The study found that this phenomenon is due to the increased production of mitochondria and a protein called ANT, which generates heat.
The study found that Tipuana tipu grows faster at higher temperatures and can contribute to urban climate resilience. The tree can thrive in restrictive weather conditions, providing ecosystem services such as carbon capture and temperature regulation.
A study by UNESP found that smoke from two concentrations stimulates germination in 32% of plant species, with some grasses growing faster. The results could aid restoration strategies for degraded areas and offer a competitive advantage to certain Cerrado species after fires.
Researchers discovered that strigolactones, previously only associated with plant development, directly influence flowering and fruiting in tomatoes. By regulating the microRNA319 pathway and gibberellin levels, strigolactones promote faster and better flowering, leading to increased yields.
A study identified a protein called IL-22BP that affects the composition of gut microbiota and the body's response to bacterial infection. The absence of this protein results in stronger defenses against intestinal infections, including increased production of short-chain fatty acids that promote an anti-inflammatory environment.
Researchers developed a new approach to combat cancer by hyperactivating tumor cells, making them stressed and vulnerable to specific drugs. The combination strategy showed promising results in colorectal and pancreatic adenocarcinoma models, paving the way for potential treatment options.
A new study has determined the vertical limits of the marine environment in the Southwest Atlantic, revealing that the mesophotic zone extends to a depth of between 15m and 18m. The research found distinct differences in fish diversity and species composition between the shallow and mesophotic zones.
A recent study published in BMC Psychology found that mild COVID-19 patients experienced significant cognitive impairment, with 11.7% showing memory loss and attention deficits. The study suggests that neuroinflammation due to SARS-CoV-2 infection may be a contributing factor to these long-term effects.
A study proposes changes to simplify licensing for landowners in the Atlantic Rainforest biome, making conservation policy more effective. The current legislation allows for the destruction of valuable forests due to its subjective and imprecise criteria.
A study has identified a key factor in how SARS-CoV-2 evades the immune system, which could lead to effective treatments. The researchers discovered that the virus distorts certain proteins on infected cells to inhibit interaction with T-lymphocytes, facilitating viral proliferation.
Yanomami children face the most severe nutritional deficit in Indigenous communities in the Americas, with 52.2% undernourished and 570 starved to death in four years. Malnutrition during infancy can have lifelong effects on health, increasing disease risk and mortality rates.
Co-circulation of Mayaro and chikungunya viruses has been observed in Roraima, Brazil's northernmost state, according to a recent study. The finding highlights the need for more effective epidemiological surveillance in the region. Deforestation and human activities may facilitate transmission in urban areas.
Researchers at Butantan Institute and collaborators developed a more potent version of the BCG vaccine, which protects against tuberculosis by inducing a strong immune response. The new formulation protected animals for a significantly longer period than conventional BCG.
Researchers at the University of São Paulo developed a novel approach to monitoring quantum dot formation, enabling real-time control over nanoparticle growth and precise emission color. This technique has several advantages over conventional synthesis strategies, including reduced waste and improved equipment efficiency.
Researchers found that high blood levels of saturated fatty acids, particularly palmitate, cause pre-activation of innate immune cells in obese non-diabetics. This leads to elevated inflammatory molecules when infected with SARS-CoV-2, increasing the risk of severe COVID-19.
Researchers found a correlation between high homocysteine levels and the severity of obstructive sleep apnea. The study suggests that measuring homocysteine could help clinicians predict the risk of developing severe apnea, enabling early intervention and prevention.
Researchers at UNICAMP and UCA optimize anthocyanin extraction from jabuticaba peel, achieving a higher yield than traditional methods. The novel method uses biosorbent material derived from the residue, resulting in an efficient and environmentally friendly process.
A new photodynamic therapy method has been shown to effectively eradicate ocular melanoma in mice, with the technique delivering two photons and minimizing damage to healthy tissue. The approach offers a promising alternative to current treatments that are often ineffective or invasive.
A recent study highlights the need for effective contingency plans and local community involvement in disaster response to mitigate losses. The analysis of landslides in São Sebastião, Brazil, revealed a breakdown in the early warning system, resulting in significant economic and human costs.
Researchers analyzed blood plasma samples from 110 patients infected with Plasmodium vivax to understand how metabolisms were affected during initial episodes versus recurrent cases. The study found that patients with recurrence exhibited modulation in lipid pathways involved in immune system production, while those with first-episode ...
A new model developed by researchers at the University of São Paulo combines physical parameters and machine learning to predict storm tides. The model uses physics-informed machine learning, which harmonizes physical models with measured data to produce more precise forecasts.
A systematic review of 14 studies found that mindfulness reduced anxiety and stress to a statistically significant extent. The study highlights the importance of combining mindfulness with improving work conditions to manage symptoms of anxiety and stress among nursing staff.
Archaeologists have re-analyzed material from the Galheta IV site in Laguna, Santa Catarina state, and found that the sambaqui builders were not replaced by ancestors of the Southern Jê. The study suggests that the sambaqui builders lived there from birth and had different funerary practices and pottery styles.
Researchers in Brazil have developed bread with probiotic yeast that may help combat asthma by reducing airway inflammation and hyperresponsiveness. The bread's probiotic properties were shown to attenuate asthma symptoms in mice, suggesting potential for a new treatment approach.
Researchers tested a therapy combining photobiomodulation and idebenone to minimize Duchenne muscular dystrophy progression. The strategy prevented muscle degeneration and improved regenerative capacity, with synergistic effects observed when administered together.
Despite improved molecular methods, trade in endangered sharks and rays has continued to rise, with 83% of detected species considered at risk of extinction. Research reveals that DNA sequencing techniques have become more cost-effective but failed to reduce the extent of species threats.
A new WhatsApp-based program has shown significant improvements in treating depression among older adults in Brazil. The Viva Vida program used simple audio messages and images to provide education on depression and behavioral activation, with a 10-point improvement in symptom reduction between intervention and control groups.
A study in São Paulo state found that chikungunya virus circulated silently for years before causing major epidemics. The researchers monitored residents for four years and discovered a significant rise in seroprevalence from 0.35% to 2.3%. This finding underscores the need for strengthened disease surveillance.
A study found that pesticides imidacloprid, pyraclostrobin, and glyphosate impair the mobility and immune system of Brazilian native stingless bees. Even if bees survive exposure to these pesticides, their immune systems are weakened, making them more prone to infections and increasing the risk of colony collapse.
Researchers created nanomicelles containing substances already approved for human use, which reduced inflammation in the tumor microenvironment and facilitated the action of the immune system. The treatment induced a reduction of over five times in tumor volume compared to untreated tumors.
Researchers found SARS-CoV-2 in male reproductive cells even when PCR testing failed, revealing a prolonged infection period of up to 90 days. The virus can remain in sperm for 110 days, reducing semen quality and raising concerns for natural conception and assisted reproduction.
A team of researchers discovered a group of neurons in the brain associated with compulsive eating and food craving. The discovery found that activation of these cells triggered vigorous foraging behavior in mice, even when they were already full.
A molecule produced by gut bacteria, indole-3-propionic acid (IPA), has been found to reduce viral load and inflammation in mice infected with influenza virus. Researchers at the State University of Campinas and Pasteur Institute discovered that supplementing IPA supplementation reduced symptoms and improved outcomes.
Researchers optimized the release pattern of Telenomus podisi, a parasitoid wasp that neutralizes the Brown stink bug, for effective biological control in soybean crops. By analyzing the dispersal range and releasing points, they found that intervals of 30 m can assure sufficient control of stink bugs.
Researchers have developed a novel material that can produce green hydrogen through photoelectrocatalysis, a process driven by sunlight. The material, composed of polyaniline nanostructures and carbon nanotubes, demonstrates enhanced light absorption and stability, making it an attractive candidate for the future of fuel production.
Researchers emphasize the importance of addressing socioeconomic, cultural, and epigenetic factors in the Latin American obesity epidemic. The study suggests that public policies and strategies must acknowledge these drivers for effective weight loss.
A study published in Nature Communications reveals that the Cerrado biome in Brazil is experiencing its worst drought in at least 700 years, caused by global warming. The research used chemical analysis of stalagmites to extend the perception of drought back seven centuries and linked it to disruption in the hydrological cycle.