Genetically controllable self-destruction of cells or apoptosis (originating from the Greek “apoptosis” - defoliation) – is one of important processes in animate nature. Surprising transformations of embryos as they grow, development and disappearance of organs and tissues – all these are apoptosis’ work. It can protect from disease or cancer or it can mutilate and kill, for example, in case of infarct or autoimmune diseases when a lot of cells perish at once.
Biochemists from the Scientific Research Institute of Physicochemical Biology (Lomonosov Moscow State University) jointly with their British colleagues have discovered that apoptosis in one cell entails the death of neighboring cells as if they came to an agreement. The researchers have assumed that the signal for mass suicide of cells is sent by hydrogen peroxide, which is formed in mitochondria of apoptosis cells, gets into the environment, easily penetrates via membranes inside healthy cells, and healthy cells in response to the invasion also start their dissociation. This is the way young frog’s tail “dissolves”.
To investigate the mechanism of this phenomenon, the researchers observed the process by the example of the cancer cells culture (uterus carcinoma) growing in Petri dishes in a thin layer. The researchers processed individual cells and groups of cells by a hormone - tumor necrosis factor. Further developments were observed by the researchers via a microscope and camera-recorded.
Sergey Komarov | alfa
Meadows beat out shrubs when it comes to storing carbon
23.11.2017 | Norwegian University of Science and Technology
Migrating Cells: Folds in the cell membrane supply material for necessary blebs
23.11.2017 | Westfälische Wilhelms-Universität Münster
Heat from the friction of rocks caused by tidal forces could be the “engine” for the hydrothermal activity on Saturn's moon Enceladus. This presupposes that...
The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.
Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....
The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.
During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....
15.11.2017 | Event News
15.11.2017 | Event News
30.10.2017 | Event News
23.11.2017 | Information Technology
23.11.2017 | Physics and Astronomy
23.11.2017 | Life Sciences