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Medical Xpress (Reino Unido)
Em 2022: 36 notícias
Desde 1995: 244 notícias
Study reveals main target of SARS-CoV-2 in brain and describes effects of virus on nervous system
Publicado em 01 outubro 2022
A Brazilian study published in the journal PNAS describes some of the effects infection by SARS-CoV-2 can have on the central nervous system.
A preliminary version (not yet peer-reviewed) posted in 2020 was one of the first to show that the virus that causes COVID-19 can infect brain cells, especially astrocytes. It also broke new ground by describing alterations in the structure of the cortex, the most neuron-rich brain region, even in cases of mild COVID-19.
The cerebral cortex is the [...]
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A novel method to predict the behavior of different COVID-19 waves in the vaccinated or previously infected
Publicado em 22 setembro 2022Researchers at the Brazil-UK Center for Arbovirus Discovery, Diagnosis, Genomics and Epidemiology (CADDE) have developed a faster, more affordable method of analyzing serological data to monitor and predict the epidemiological behavior of COVID-19. A study conducted by the scientists showed that the method predicted the arrival in Brazil of the delta variant first detected in India in 2020 and originally named B.1.617.2. They now aim to validate its use in epidemiological surveillance to [...]ver notícia -
Protein restriction can be effective in combating obesity and diabetes, study suggests
Publicado em 20 setembro 2022Cutting protein intake can help control metabolic syndrome and some of its main symptoms, such as obesity, diabetes and high blood pressure (hypertension), according to a study conducted by researchers in Brazil and Denmark to compare the effects of protein and calorie restriction diets in humans. An article reporting the study is published in the journal Nutrients. Metabolic syndrome is a cluster of conditions that heighten the risk of cardiovascular disease, stroke and diabetes, [...]ver notícia -
Researchers identify molecular mechanisms leading to Zika-associated microcephaly
Publicado em 19 setembro 2022Researchers in Brazil affiliated with the State University of Campinas (UNICAMP), D'Or Institute and the Federal University of Rio de Janeiro (UFRJ) have identified molecular processes that may help explain microcephaly in babies born to mothers infected by the Zika virus. The research proposes a model at the molecular level to understand the complications caused by infection during pregnancy and paves the way to the identification of novel therapeutic targets. According to an article on [...]ver notícia -
Hyperglycemia is the variable that most affects the number of deaths from heart attack
Publicado em 19 setembro 2022Several factors increase the risk of heart attack, such as high blood sugar (hyperglycemia), obesity, abnormal cholesterol levels, high blood pressure (hypertension), and smoking. A study conducted in Brazil and reported in an article published in the journal PLOS ONE has measured the impact of these factors. The researchers analyzed data for the Brazilian population collected between 2005 and 2017, determining the number of deaths attributed to each risk factor. The aim of the study [...]ver notícia -
Researchers identify neurons that specialize in remembering speed and location
Publicado em 14 setembro 2022Over a decade after the role of pyramidal neurons in mental representations of space and location was discovered, a group of Brazilian and American researchers has made an important contribution to scientists' understanding of the brain's navigation system by identifying a subtype of these neurons that can gauge speed with great precision. "In experiments involving animals, we demonstrated an association between the electrical activity of inhibitory interneurons and speed [...]ver notícia -
Fungal infections increase mortality among hospitalized COVID-19 patients worldwide
Publicado em 12 setembro 2022Every day we inhale thousands of potentially pathogenic fungal spores, but our immune system simply eliminates them. However, in people with compromised immunity, such as transplant and cancer patients, as well as hospitalized patients in intensive care, the interaction between pathogen and host may be quite different. Fungal infections that emerged during the COVID-19 pandemic, reinforcing the action of SARS-CoV-2 around the world, are a case in point. Mortality reached 80% among severe [...]ver notícia -
Older people with anemia and weak muscles face higher risk of dying
Publicado em 29 agosto 2022A study by researchers at the Federal University of São Carlos (UFSCar) in Brazil and University College London (UCL) in the United Kingdom shows that a combination of anemia and weak muscles in older people heightens the risk of death in ten years by 64% for men and by 117% for women. Anemia alone increases the risk of dying by 58% in men. For women, dynapenia (loss of muscle strength) is a more important risk factor on its own, increasing the risk of death by 68%. The two conditions [...]ver notícia -
Study reveals mechanism involved in rare pediatric brain cancer and points to possible treatment
Publicado em 29 agosto 2022A study conducted by researchers in Brazil, Australia, Austria and the United States has made significant discoveries about a type of pediatric cancer with no approved drugs for treatment and with a low survival rate. The findings, described in an article published in the journal Neuro-Oncology, pave the way for a search for more specific therapies. "Ependymomas are central nervous system tumors of various kinds that can basically be treated only by surgical removal and radiation [...]ver notícia -
Researchers map incidence of malaria in pregnancy in Brazil
Publicado em 16 agosto 2022A malaria study in Brazilian pregnant women by researchers at the University of Sao Paulo (USP) found that Lancet Regional Health – Americas According to the researchers, this study is the first to provide insight into endemic malaria during pregnancy in terms of spatial and temporal trends. The survey results are malaria In the northern regions of Brazil, especially in the Amazon, pregnancies during pregnancy remain a major public health problem, with cases falling by half during the [...]ver notícia