Conceitos essenciais
Ongoing European research efforts are shedding light on the mechanisms underlying long COVID, paving the way for potential treatments.
Resumo
The article discusses the European Union's efforts to fund large-scale studies on the long-term consequences of COVID-19 infection, known as "long COVID." It highlights the work of several researchers who are gaining insights into the condition.
Key points:
- Early on, clinicians noticed that some COVID-19 patients were returning to the hospital sicker than when they had left, even months after the initial infection.
- In 2021, the EU's Horizon Europe program provided over €100 million to fund cohort studies on long COVID, and an additional €2 million was recently announced.
- Researchers have found that long COVID is associated with a dysregulated immune system, including increased activation of the complement system and the reactivation of latent viruses like herpes.
- Persistent SARS-CoV-2 RNA in the body, known as "RNAemia," has also been linked to long COVID, though the exact relationship is still unclear.
- Genetic factors and the use of antiviral treatments are being investigated as potential contributors to and solutions for long COVID.
- While many questions remain, the increased research focus on long COVID is expected to lead to a better understanding of the condition and the development of effective treatments.
Estatísticas
The EU's Horizon Europe program provided over €100 million to fund large cohort studies on the long-term consequences of COVID-19.
The European Commission recently announced an additional €2 million for long COVID projects.
A study found that the Omicron variant was associated with a reduced risk of developing long COVID compared to previous variants.
A study of 39 healthy controls and 113 COVID-19 patients found that 40 patients exhibited long COVID symptoms at the 6-month mark, and they had elevated complement activation and thromboinflammation markers.
Researchers found that in vitro exposure to SARS-CoV-2 triggers the expression of the HERV-W proinflammatory envelope protein in a subset of healthy patients, and this protein was consistently detected in blood samples from 221 COVID-19 patients.
Citações
"Very early on, we had the feeling that we had to keep following them."
"The vast majority of people have been infected with herpetic viruses at some point in their lives. In some stressful conditions, such as coinfection, they can be reactivated. One hypothesis is that this coinfection mechanism happens in some who develop long COVID."
"Long COVID is a new condition, very hard to understand fully. But we are now entering a very different era. Now that we are out of the madness of the pandemic, we can focus on understanding what is happening in people with long COVID."