Tag: "precursors" at biology news
Researchers To Investigate Years Before Menopause
...men are born with all the ovarian follicles -- egg precursors
-- they will ever have. Each month a number of egg precursors
begin to grow, but normally most die off, leaving one egg per cycle to ovulate. As women age...
Wonder Thread: UD Scientists Report First Protein With Collagen And Elastin-Like Domains
...distal end." The UD team also examined the protein precursors
for Col-P and Col-D, found in the mussel foot, where byssal threads are produced. Specific antibodies--proteins designed to detect and fight off foreign molecules by binding with them--helped Coyne target preCol-P. First, messenger RNA (ribonucleic a...
Cellular Engineers Design Custom Cell Surfaces Able To Adhere To Synthetic Materials
... amounts of natural (ManNAc)and unnatural (ManLev) precursors
fed to the cells. Cell surfaces modified for specific reactions hold great promise in theconstruction of biocompatible materials and artificial organs, but the interestsof Bertozzi's cell-surface group don't stop there. "We're investigating ...
Researchers Investigate Years Before Menopause
...men are born with all the ovarian follicles -- egg precursors
-- theywill ever have. Each month a number of egg precursors
begin to grow, butnormally most die off leaving one egg per cycle to ovulate. As women age, theyhav...
Retinoic Acid Used In Cancer Treatment
...forming proteins to switch on proto-oncogenes, the precursors
to oncogenes -- demonstrate how retinoic acid can use the same chemical-signalling cascades that cause cell growth instead to arrest growth. "Retinoic acid can reverse the defect in growth control that was caused by the viral agent and result...
Precursors To Red Blood Cells Form Earlier Than Previously Thought
...f Rochester Medical Center havediscovered that the precursors
of blood cells develop in theembryos of mammals so...ght topinpoint the place and time that blood cells precursors
firstarise. "We wanted to know where and when embryonic cells becomecommitted to blood cell fates, i...
Scientists Make Progress Toward Gene Therapy For HIV Infection
... of mature T-cells rather than from stemcells, the precursors
of all immune system cells. Thus, once T-cells withcertain specificities are lost to HIV infection, they may be difficult toreplace. According to Dr. Walker, this finding suggests that "adoptive transfer ofT-cells may prove to be a feasible appr...
Cultured Neural Stem Cells Reduce Symptoms In Model Of Parkinsons Disease
... R.D.G. "Transplantation of expandedmesencephalic precursors
leads to recovery in Parkinsonian rats." NatureNeuroscience, Vol. 1, No. 4, August 1998, pages 290-295. This release will be posted on EurekAlert! at http://www.eurekalert.org and onthe NINDS home page at http://www.ninds.nih.gov/whtnwhp.htm ....
Studies Rebut Concept That Body Stores Vitamin A-Making Substances
...me carotenoids, particularly beta carotene, act as precursors
tovitamin A. The carotenoids convert intoretinol, which is the active form of the vitamin. The new research, involving two studies, was performed on Mongolian gerbils andreported in the July issue of theJournal of Nutrition. Implications of the work...
Computer Simulation To Predict Forest Fires
... can be omens of larger ones and landslides can be precursors
to avalanches, Cornell University geologists have shown in a computer simulation that forest fires display the same natural behavior. Their findings, they believe, could be used to predict where large forest fires can occur -- and how to prevent the...
Monkeys Have Numerical Abilities, Two Columbia Psychologists Report
...ace's serial task, which he developed to study the precursors
oflanguage in non-human primates, to ask questions about natural abilities thatmonkeys might use to represent their environment, such as counting. She wasrecently awarded a fellowship from the National Institutes of Health to continueher experiments...
New England Journal Of Medicine Reports Calcium Supplements Help Prevent Polyp Recurrence; DMS Led Study
... of calcium in reducing adenomas, which are likely precursors
of mostcolorectal cancers. Earlier studies in humans and animals indicated positiveeffects, but this investigation provides direct experimental results in humansubjects. Baron notes, "Epidemiological data regarding the association between dietaryca...
A Versatile Signal In Vertebrate Embryogenesis: Wnt-4 Regulates Kidney Development, Sex Organ Differentiation, Neuronal Survival And Axonal Guidance
...s the mesenchyme to condense and to form tubules - precursors
tonephrons. The mesenchyme in turn promotes ureteric bud proliferation andbranching. The ureteric signal can be mimicked by other tissues, in particularthe spinal cord. Andreas Kispert, when postdoc in Andrew McMahon's laboratory at HarvardUniversit...
Cedars-Sinai Medical Center Physicians And Scientists Present Findings At Annual Meeting Of The Pediatric Academic Societies
...oliferating during the initial 24-hour period were precursors
to glia cells -the supportive structures of the nervous system. This rapid reproduction of glial precursors
is believed to be at least partlydue to activation of PI3 Kinase, an enzyme that interacts with othe...
Brown University research team finds keys to liver development
... "We are working with the true embryological precursors
to the liver,allowing us to study how cells go down that particular pathway," Zaret said. "Withthis lineage of definitive precursor cells, we have a chance of advancing thefield of stem cell biology." The study's lead author ...
Scientists find first molecule that guides nerve cells through the brain
...ostral migratory stream). By labeling the neuronal precursors
with dye, theresearchers were able to see them migrating in the RMS. But when they placedSlit-producing kidney cells on the RMS, very few young neurons ventured forth."This experiment provides strong evidence that Slit can repulse neurons in theirnat...
National Cancer Institute awards cancer center $4.5 million for colon cancer research
...identify 20 siblings who had colon polyps that are precursors
to cancer, and two individuals whose polyps showed early changes of colon cancer," said Markowitz, who is an oncologist at UHC. "This is more evidence that the whole family is at risk once a family member is found to have polyps or cancer." Markowi...
Don't slight the birdbrain
...mmals, where scientists now agree that multipotent precursors
line the brain's inner ventricles, but only two sp...t do so? To find out whether the answer lay in the precursors
themselves or in the brain environment they encounter, they tested the notion that it is the death o...
Healing the brain from the inside out
... the forebrains of mice. Other work has shown that precursors
can form new neurons in two limited areas of the b...ab has had success with injecting lab-grown neural precursors
into the cortex of mice and watching them replace dying cells. Still even while working with transpl...
UNC opens first clinical trial of vaccine treatment for advanced breast cancer
...he team removes progenitor cells -- dendritic cell precursors
-- from the patient's blood. "At any one time, the percentage of dendritic cells in the bloodstream is quite small, maybe one hundredth to one thousandth of the cells in the bloodstream," Dr. Serody explained. "So we need to increase that number ini...
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