Tag: "errors" at biology news
Researchers suggests a potentially damaging effect of extremely low frequency electromagnetic fields
...LF-EMF makes the cells push on into division where errors
become compounded. The researchers suggest that ELF-EMF may interfere with the G2 checkpoint that normally stops damaged cells entering division before they have had the opportunity to repair the damage, increasing the chances of them becoming cancer...
Genetic discovery in fruit flies may open new avenues for understanding cancer growth in humans
...cts. In lower organisms, for example, such genetic errors
have been associated with a shortened life span. In the Parkhurst lab, Sir2 mutations have been linked to drastic developmental defects and foiled gender assignment, taking a significant toll on equality of the sexes, at least as far as the fruit fly...
Damaged DNA synthesis enzyme shown to cause progressive muscle weakening
...s (the mitochondrial genes) a damaged enzyme makes errors
ten-fold to 100-fold more frequently than in healt...ver, they said, the principle of repeated, copying errors
applies to other mitochondrial degenerative conditions as well, including aging itself. The answer t...
Gene study determines how humans are related to fruit flies and nematode worms
...as carefully as we wanted to in order to avoid the errors
that can creep into automated analyses," comments Jaime E. Blair, a graduate student at Penn State and first author of the paper. "You want to be sure, for example, that you are comparing the nematode version of gene A with the human version of gene...
Men regain evolutionary drivers seat
...s that these mutations are caused mainly by random errors
that occur during cell divisions rather than by en...tually no polymorphism, did not start accumulating errors
until the point of speciation. "When you account for ancient-nucleotide polymorphism, alpha increase...
Researchers discover new mechanism that targets and destroys abnormal RNA
... destroys faulty mRNA is critical in ensuring that errors
in the genetic code are not passed on to proteins.... called nonsense codons. Many genetic mutations or errors
in transcribing mRNA result in nonsense codons that fail to code for any amino acids, the building b...
Cutting-edge research to be presented at ASCPT pharmacology conference
...e control Tool to identify and prevent medication errors
A pressroom will be available for media representatives on the Convention Level of the Atlanta Marriott Marquis, from March 24 through March 27, 8:00 a.m. to 5:00 p.m., daily. Log on to http://www.ascpt.org/press/ for press releases, tip sheets an...
UCSD biologists discover that machinery for cell division plays dual role in partitioning developing embryo
...e mutations in the genes that produce them lead to errors
in the partitioning of germline granules that, in a healthy embryo, all flow into the smaller of the first two dividing cells. This can be seen in a series of photographs taken by Rappleye of roundworm sperm DNA (at arrow) entering a normal egg (at ...
A novel cardiac glycogen storage disease
Glycogen storage disorders are inborn errors
of metabolism that typically affect the cellular architecture and function of the liver or kidney. However, some of these diseases manifest in skeletal or cardiac myocytes, where they lead to altered electrophysiological responses, muscle weakness, a...
Stool test for colon cancer reported by Kimmel Cancer Center at Johns Hopkins
...ons initiate the cascade of molecular and cellular errors
that eventually result in tumor formation. Though the Hopkins team has always expected this early colon cancer marker was present in cells shed into stool, it required several years of additional research to develop the technology to reliably identi...
Genetic mutations linked to breast, ovarian cancer may be underestimated
...he "misses" were the result of both administrative errors
and inherent weaknesses in the detection methods. This led the authors to conclude that earlier studies may have underestimated the prevalence of BRCA1 mutations. For example, the authors said a previous study pegging the rate of mutations in BRCA...
Human cancer-detection test showing promise in pets, too
... the two malignant tumors likely was the result of errors
in tissue processing, Kitchell said. The malignant samples included vaccine-induced sarcomas, osteosarcomas and lymphosarcomas, Kitchell said. Telomerase activity appears to be a unique feature of benign tumor cells that have undergone malignant tra...
New analysis promises to speed application of human genome draft
...nough, says Zwick. Such an analysis would give 10 errors
out of every 10,000 points in the sequence, but th...o be useful, the data has to have fewer than eight errors
in 10,000," he explains. The new technique identified more than 80 percent of the determined sequen...
USF creates national patient safety center to study fall-related injuries, medication errors
...s on preventing injuries from falls and medication errors
has been created at the University of South Flori...nslate findings about patient falls and medication errors
into educational programs and clinical practices and technologies that will make the health care sys...
New study shows normal-looking clones may be abnormal
... may have a different set of problems arising from errors
occurring during culturing that cannot be fixed by cloning," says David Humpherys, a senior graduate student in the Jaenisch lab. This may mean researchers will need to find ways to better preserve gene regulatory tags during cell culture techniques....
Scientists decipher "fail-safe" system that limits gene copying in cells
...get faulty instructions and may start a buildup of errors
that can cause cancer generations hence. Scientists at the University of California, San Francisco have deciphered the long-puzzling process by which every cell regularly averts these dangers by shutting down the gene copying process as soon as one c...
Scientists find solution to a mystery surrounding Alzheimers, Huntington's and other neurological diseases
...e determined by specific genes. But random genetic errors
and mutations may cause proteins to fold into the wrong 3-D configuration - often with devastating results. One example is huntingtin a protein found in healthy nerve cells. A slight genetic mutation may cause huntingtin proteins to fold incorrectl...
K-State veterinarian's lab site for DNA registry
... or more litters had gotten mixed-up. In addition, errors
in pedigrees have been identified and corrected. In a few cases, DNA testing provided the evidence necessary to remove individuals from the National Greyhound Association because they had purposefully misrepresented the pedigree or identity of a dog....
Mistaken attachments cause cancer-promoting chromosome distribution errors
... This appears to be a major source of distribution errors
that often lead to cancer.Dividing cells first duplicate each of their chromosomes, then use a diamo...
UCSD biologists discover new class of genes responsible for embryonic development
...n as PAR, because mutations in these genes lead to errors
in the partitioning of germline granules that, in a healthy embryo, all flow into the smaller of the first two dividing cells. First discovered in 1988, six PAR mutants have been identified in C. elegans and related genes have been found in frog, fru...
1 2 3 4 5 6