Tag: "cells" at biology news
Jefferson Scientists Find Potential Deadly Effects Of Two Missing Cancer-Suppressor Genes
...destructing. As many as 60 to 90 percent of the cells
underwent apoptosis." Men have an X and a Y ...is some damage to the X and other chromosomes when cells
duplicate and go through a "cell cycle." Cells have an innate repair mechanism to fix the prob...
A New Biochemical Link Established Between Stress, Sex And Dominance
...n the head All of this is reflected in a patch of cells
in the fish's brain that increase eight-fold in vo...us as well. The colors and eyepatch fade, the GnRH cells
in the brain shrink and so do the gonads. "In our lab, we have shown that behavior influences the b...
Common Childhood Virus Poses Threat To Adults, Research Shows
...lated. The RSV virus attacks the epithelial cells
that line the airways in thelungs. It spreads as people cough up infected epithelial cells, so handwashing is the best way to limit the spread of RSV. RSV is the leading cause of severe lower respiratory tract infectionin infants and young children....
MGH-Led Team Finds Gene For Crippling Neurologic Disorder
... organisms, the heat-shock proteins/proteases help cells
recover from stresses including heat, traumatic injury and chemical poisoning. Until now, no human disease has been associated with these proteins. "This is quite exciting, because it may help us understand how stress situations bring on a variety ...
Pea Plant Stem Growth Gene Cloned
...zyme crucial to the division and elongation of the cells
in the plant's stem. Researchers Diane R. Lester, a molecular biologist; John J. Ross, a plant physiologist and James B. Reid, professor of genetics, all at the University of Tasmania, and Davies, will publish "Mendel's Stem Length Gene (Le) Encodes ...
Discovery Of Genetic Pathways May Provide New Ways To Combat Candida Infections
...ates recently captured on video the fate of immune cells
infected with Candida in a petri dish. When Candida enters a host, the organism is eaten up by cells
called macrophages, which are the sentinels of the immune system. But soon, the fungi fight back, s...
Molecular Piracy Turns Protein Into Traitor
...all main co-receptors used by HIV to gain entry to cells
(CCR5, CCR3, CXCR4 and US28). Full details of the ...ater on, HIV mutatesallowing it to gain entry to T cells
through CXCR4. Biologically, the virus appears to have optimised vMIP-II to block leukocyte recruitm...
Trojan Horse Virus Controls Hiv Infection
...Trojan horse that selectively targets HIV-infected cells
and thendestroys them. As reported Sept. 5 in the...ely controlled HIV infection in laboratory-grown T cells
anddramatically reduced infectious HIV to levels that were barely or no longerdetectable. "This is a...
Low Oxygen, Key To Fetal Development, Also Offers Cancer Clues
...nancy. The team studied cytotrophoblasts, the cells
from theplacenta that form the connection between mother and fetus byattaching to the uterus. These cells
eventually evolve intotumor-like cells
that invade the mother's uterus and establishblood flow to th...
Wonder Thread: UD Scientists Report First Protein With Collagen And Elastin-Like Domains
...D. They used pepsin, an enzyme secreted by stomach cells
of vertebrates, to pinpoint the collagens. Unlike most proteins, Waite says, Col-P and Col-D don't break apart in response to pepsin. Since pepsin works best in an acidic environment, researchers simply placed byssal threads and pepsin in a weak solu...
OHSU Scientists Discover Mice Lacking Dopamine Receptor Are Supersensitive To Alcohol, Cocaine And Methamphetamine
...f mice who lack the D4 receptor. "Branching nerve cells
communicate with each other by secreting chemicalm...pamine that bind to receptors on neighboring nerve cells
in alock-and-key fashion," explains, David Grandy, Ph.D., OHSU scientist and seniorauthor of the art...
Gene For Last Major Form Of Batten Disease Discovered
...m the neurons. Since neurons don?tdivide as other cells
do, they are unable to reduce their load of undigestedproteins. A second possibility is that the normal enzyme is required to producesomething neurons need to survive, such as a nerve growth factor. The researchers are now developing DNA and protein...
Smoking Mice Lead To Emphysema Breakthrough
...at emphysema was caused byneutrophils, white blood cells
that destroy foreign invaders and, occasionally,ca... macrophages played arole in emphysema because the cells
seemed incapable of destroying sturdy lungtissue. But recent experiments by Shapiro and others showe...
Plant-Based Therapies Examined For Colon Cancer Prevention
...ent antioxidantsand antiinflammatories, can affect cells
in a similar manner as sulindac, whichprompts the cells
to "turn on" a program of regulated cell death calledapoptosis. NSAIDs, which include ibuprofen and...
New Mechanism To Explain Carbon Monoxide Poisoning Identified
...ing oxygen delivery to the body'scells. Eventually cells
essentially suffocate and die. "This traditional v...An excess of NO, however, is deleterious to brain cells
and othertissues. "The amount of nitric oxide in the cell interior rises because carbonmonox...
Report Notes Difficulties In Eliminating E. Coli O157:H7 From Food Supply
... document's authors. Less than ten E. coli O157:H7 cells
may cause foodborne illness in people. Infectious doses associated with this pathogen in outbreaks have beenconsistently low?a characteristic associated with the organism's acid tolerance,according to Buchanan and Doyle. Unlike most other pathogens, ...
Study: Hydrogen Bonds Aren't Key To DNA Pairing After All
... to thwart the enzymes that copythe genes of tumor cells
and viruses. The work was supported by the National Institutes of Health....
Bowman Gray Scientists Find Novel Way To Block AIDS Virus
...-receptor on the surface of particular white blood cells
calledlymphocytes is blocked, making the cells
immune to infection by HIV-1. HIV-1 virus causes AIDS by invading and destroying the white b...
Two-Pronged Attack On Immune System Cells Engineered By HIV Gene vpr: Effects Markedly Reversed By Antisteroid Compound RU-486
...mmune system and, in fact, directly infect thevery cells
tasked with defending the body against infection. ...vely induces apoptosis inneighboring immune system cells
that have not yet been infected, known as CD4 Tcells. It also interferes with the ability of those c...
Scientists Find New Trigger For Nerve Cell Death
... challenges awell-established idea about why nerve cells
self-destruct when the brain orspinal cord is inju...will open up new possibilities forprotecting nerve cells
in patients who suffer stroke, head injury, spinal cordinjury or neurodegenerative disorders such as...
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