According to the World Health Organization, one in six worldwide deaths have been attributed to cancer; however, these fatalities were not due to initial malignant tumors—the deaths were caused by the spread of cancer cells to surrounding tissues and subsequent tumor growth. These tissues, which consist largely of collagen, have been the focus of a recent collaborative study by a team from…
An improved high-tech fluorescence microscopy technique is allowing researchers to film cells inside the breast as never seen before. This new protocol provides detailed instructions on how to capture hi-res movies of cell movement, division and cooperation, in hard-to-reach regions of breast tissue. The technology – called multiphoton microscopy – uses infrared lasers to illuminate…
Working with colleagues from Germany and the US, researchers at Leipzig University have achieved a breakthrough in research into how cancer cells spread. In experiments, the team of biophysicists led by Professor Josef Alfons Käs, Steffen Grosser and Jürgen Lippoldt demonstrated for the first time how cells deform in order to move in dense tumour tissues and squeeze past neighbouring cells. The…
University of Minnesota Medical School researchers studied SARS-CoV-2 infections at individual cellular levels and made four major discoveries about the virus, including one that validates the effectiveness of remdesivir – an FDA-approved antiviral drug – as a form of treatment for severe Covid-19 disease. “Since the start of the Covid-19 pandemic, the way that each individual responds…
Improving the detection of cancerous cells during surgery – this is the goal of the European research project CARMEN. The research institutes Laser Zentrum Hannover e.V. (LZH) from Germany and Multitel asbl from Belgium work together with companies from both countries, JenLab GmbH, Deltatec, and LaserSpec, to develop a novel, compact and multimodal imaging system. This could even allow the…
Scientists from Würzburg and the US have charted the first global atlas of direct interactions between SARS-CoV-2 RNA and human host cells. This may provide a starting point for novel treatments. SARS-CoV-2 infections pose a global threat to human health and a formidable research challenge. One of the most urgent tasks is to gain a detailed understanding of the molecular interactions between the…
Researchers have discovered that microglia cells constantly survey the brain to prevent spontaneous seizures.
For the first time ever, expansion microscopy allows the imaging of even the finest details of cell membranes. This offers new insights into bacterial and viral infection processes.
Our immune system can efficiently fend off viral diseases. Two types of immune cells play an important role in this process: The T-cells, which firstly can directly destroy virus-infected cells and secondly enable the formation of efficient, virus-neutralizing antibodies by B-cells. These two cell types also play a crucial role in the immune defense against SARS-CoV-2 infection. Whereas antibody…
How do cells in our bodies ask for directions? Without any maps to guide them, they still know where to go to heal wounds and renew our bodies. Edouard Hannezo and his group at the Institute of Science and Technology Austria (IST Austria) together with Tsuyoshi Hirashima and his group at Kyoto University just published a new study in Nature Physics that shows how mechanical and chemical waves…
Researchers at ETH Zurich and the University of Bern have discovered a mechanism by which the coronavirus manipulates human cells to ensure its own replication. This knowledge will help to develop drugs and vaccines against the coronavirus.
Researchers studying tissue removed from patients noses during surgery believe they may have discovered the reason why so many people with COVID-19 lose their sense of smell, even when they have no other symptoms. In their experiments they found extremely high levels of angiotensin converting enzyme II (ACE-2) only in the area of the nose responsible for smelling. This Enzyme is thought to be the…
Tiny finger-like projections called filopodia drive invasive behavior in a rare subset of lung cancer cells, researchers at Winship Cancer Institute of Emory University have found. Adam Marcus’ lab has developed innovative techniques for separating “leaders” and “followers,” subpopulations of tumor cells that cooperate during the process of metastasis. The lab’s new analysis of what…
Although its name is relatively unspecific and indeed opaque, the Nonstructural Protein 1 (Nsp1) encoded by the coronavirus SARS-CoV-2, which is responsible for the current pandemic, has now been shown to have a devastating effect on host cells. Nsp1 is in fact one of the central weapons used by the virus to ensure its own replication and propagation in human hosts. Nsp1 was identified as a…
As cells develop, changes in how our genes interact determines their fate. Differences in these genetic interactions can make our cells robust to infection from viruses or make it possible for our immune cells to kill cancerous ones. Understanding how these gene associations work across the development of human tissue and organs is important for the creation of medical treatments for complex…
Resistance of cancer cells against therapeutic agents is a major cause of treatment failure, especially in recurrent diseases. An international team around the biochemists Robert Ahrends from the University of Vienna and Jan Medenbach from the University of Regensburg identified a novel mechanism of chemoresistance which has now been published in "Nature Communications". It is driven by…
New research suggests that cigarette smoke spurs the lungs to make more ACE2 (angiotensin-converting enzyme 2), the protein that the coronavirus responsible for COVID-19 grabs and uses to enter human cells. The findings, reported in the journal Developmental Cell, may explain why smokers appear to be particularly vulnerable to severe infections. The analysis also indicates that the change is…
A team of biochemists and virologists at Goethe University and the Frankfurt University Hospital were able to observe how human cells change upon infection with SARS-CoV-2, the virus causing COVID-19 in people. The scientists tested a series of compounds in laboratory models and found some which slowed down or stopped virus reproduction. These results now enable the search for an active substance…
In a new study, researchers from the University of Copenhagen have discovered two important functions of a protein called RTEL1 during cell division. The researchers hope that the new knowledge will help to find new cancer treatments. One of the body's most important processes is cell division, which occurs throughout life. Normal cells only have a limited number of divisions, while in cancer…
