Corals can sense what's coming
Australian scientists have thrown new light on the mechanism behind the mass death of corals worldwide as the Earth's climate warms.
Australian scientists have thrown new light on the mechanism behind the mass death of corals worldwide as the Earth's climate warms.
Environment
Nov 18, 2011
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Do bacteria, like higher organisms, have a built-in program that tells them when to die? The process of apoptosis, or cell death, is an important part of normal animal development. In a new study published March 6 in the ...
Cell & Microbiology
Mar 6, 2012
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A research team from the National Institute for Materials Science has developed a new nanofiber mesh which is capable of simultaneously realizing thermotherapy (hyperthermia) and chemotherapy (treatment with anticancer drugs) ...
Bio & Medicine
Jul 2, 2013
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Japanese researchers report that incorporating magnetic nanoparticles and an anticancer drug into crosslinked polymer nanofibers presents a twofold treatment for fighting cancer with diminished side effects.
Bio & Medicine
Jul 16, 2013
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(PhysOrg.com) -- An international team of biochemists, biophysicists, and neutron scientists are using a combination of fluorescence and small-angle neutron scattering (SANS) techniques to assist biochemists in better understanding ...
Biochemistry
Dec 15, 2011
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Inside a cell, death often occurs like the wave at a baseball game.
Cell & Microbiology
Aug 9, 2018
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126
(Phys.org) —Scientists at the University of East Anglia are developing a new class of anti-cancer drugs that are not only powerful but also circumvent a primary cause of resistance to chemotherapy.
Cell & Microbiology
Jul 3, 2013
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Apoptosis, often referred to as programmed cell death, is a fundamental process crucial to the growth and development of multicellular organisms. This process, or a primordial form of it, is also observed in single-celled ...
Evolution
Oct 12, 2023
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196
(Phys.org) —A team of researchers with members from several facilities in California and from one in Australia has found evidence that an unfolded-protein-response can both activate and degrade the death receptor 5 protein ...
A young scientist from The Hong Kong Polytechnic University (PolyU)'s Food Safety and Technology Research Centre (FSTRC) has successfully prepared highly stable selenium nanoparticles by using the polysaccharide-protein complex ...
Bio & Medicine
Dec 21, 2011
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Apoptosis ( /ˌæpəˈtoʊsɪs/) is the process of programmed cell death (PCD) that may occur in multicellular organisms. Biochemical events lead to characteristic cell changes (morphology) and death. These changes include blebbing, cell shrinkage, nuclear fragmentation, chromatin condensation, and chromosomal DNA fragmentation. (See also Apoptosis DNA fragmentation.) Unlike necrosis, apoptosis produces cell fragments called apoptotic bodies that phagocytic cells are able to engulf and quickly remove before the contents of the cell can spill out onto surrounding cells and cause damage.
In contrast to necrosis, which is a form of traumatic cell death that results from acute cellular injury, apoptosis, in general, confers advantages during an organism's life cycle. For example, the differentiation of fingers and toes in a developing human embryo occurs because cells between the fingers apoptose; the result is that the digits are separate. Between 50 and 70 billion cells die each day due to apoptosis in the average human adult. For an average child between the ages of 8 and 14, approximately 20 billion to 30 billion cells die a day.
Research in and around apoptosis has increased substantially since the early 1990s. In addition to its importance as a biological phenomenon, defective apoptotic processes have been implicated in an extensive variety of diseases. Excessive apoptosis causes atrophy, whereas an insufficient amount results in uncontrolled cell proliferation, such as cancer.
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