Tag: "distinct" at biology news
Alzheimer's disease is not accelerated aging
...t changes related to Alzheimer's disease appear in distinct
regions of the brain and reflect unique pathology compared with changes that occur in older adults without dementia. "We're getting a better understanding of the complex constellation of factors that change [in the brain] with aging," said Howard H...
Genetic differences might help distinguish thyroid cancers
...ses. Eng and her colleagues have shown that two distinct
groups of genes are either over-active or under-active in PTC cells compared with normal thyroid cells. Genes that were inactive or under-active were more typical of FTC cells. They further found that five genes could distinguish the two tumor...
Hidden diversity: DNA 'barcoding' reveals a common butterfly is actually 10 different species
...s" is really an amalgam of a number of genetically distinct
lineages, each with different caterpillars and pre...tinct animal was the only example of a genetically distinct
species, hiding inside a morphology similar to the surviving species?" Janzen and his colleagues rep...
DNA barcode finds four new bird species
...f animal life, from flatworms to vertebrates, have distinct
COI sequences. "The genetic barcoding ...ey found that each of the 260 species tested had a distinct
COI sequence. For 130 of these species, the researchers looked at the DNA of two or more individuals...
Tracing genes, biologists show lizard migration is traced to Florida
...ve found that there are at least eight genetically distinct
groups of the lizard. In the late 1800s, Anolis s...o Florida, there is a new mixing of genes from the distinct
Cuban source populations." Kolbe, Glor, Washington University biology professors Allan Lar...
Key cell-death step found
... two mitochondria could join without mixing up the distinct
membranes. Nunnari's team devised ways to get stop...the process in isolated mitochondria. They saw two distinct
stages. First, outer membranes joined, creating an intermediate structure with one outer membrane ho...
Targeted therapy knocks out pediatric brain cancer in mice
...he use of several compounds in concert that target distinct
pathways important for tumor cell growth. Our mouse studies with HhAntag offer the hope that such precise, targeted molecular interventions could spare children from the devastating effects of surgery, toxic chemotherapy, and exposure to high doses o...
Genes expose secrets of sex on the side
...up tested DNA from 389 individuals representing 10 distinct
human populations from places as far apart as the Netherlands, South Africa and Papua New Guinea. Previous explanations of women and men's migration patterns had been based on a combination of genetic patterns and knowledge about the m...
Gene expression in liver tumors and patient prognosis
...en the subclasses. The study yielded two distinct
subclasses of HCC that were highly associated with patient survival and provided new molecular insight into the pathogenesis of HCC. Tumors from the low survival subclass had a strong cell proliferation and antiapoptosis gene expression signatures. T...
Can an old gene learn new tricks?
...ctions in CNS development and have overlapping yet distinct
functions in the development of the vestibular system of the inner ear, an organ that has no counterpart in Drosophila. The researchers found that when mice are genetically engineered to lack Hmx2 and Hmx3, Drosophila Hmx can substitute for the mous...
There and back again
...cope, mesenchymal cells are amorphous and lack the distinct
apical-basal polarity that characterizes their epi...ypes of cells contribute to the body's function in distinct
ways, with epithelium being the essential structural and physiological component of organs and tissu...
Researchers report new gene test for isolated cleft lip and palate
...ostic tools of its kind, the gene test is based on distinct
mutations in and around the gene IRF6, which encodes a specific protein that plays a vital role in the normal formation of the lips, palate, skin and genitalia during the early stages of development. The researchers found that mutations of the IRF6 g...
OutFoxed! New research may redefine late-stage cardiac development
...idedness". Many organs in the mammalian body have distinct
left and right sides such as the heart and lung. In Foxp4 mutant embryos, both hearts show the correct "sidedness" regardless of whether they were on the right or left side of the embryo. The researchers suggest this work may be crucial in determin...
Complex cells likely arose from combination of bacterial and extreme-microbe genomes
... Archaea as "prokaryotes"--a cell type that has no distinct
nucleus to contain the genetic material, DNA, and few other specialized components. More-complex cells, known as "eukaryotes," contain a well-defined nucleus as well as compartmentalized "organelles" that carry out metabolism and transport molecules ...
Viral suspect for amphibian decline traced to human spread through bait
...om frogs to fish. The salamander virus however, is distinct
from either of these and may be a recent development because of its lack of genetic diversity. "The basic story, based on the molecular analysis, is that the virus has a very recent history in the west and it is a history that suggests in its pattern...
Common cold virus can cause polio in mice when injected into muscles
... accepted that Coxsackievirus and poliovirus cause distinct
illnesses because they bind to different docking s... the nervous system. "We gave the coxsackievirus a distinct
advantage by injecting it directly into muscle, where it had direct access to the kinds of nerve cel...
Genuine stem cells found in skin might treat hair loss, wounds
... the hair follicle, the researchers discovered two distinct
populations of resident cells within the bulge--one attached and one detached from the underlying extracellular matrix known as the basal lamina. New methods devised by the team then allowed them to isolate those two cell types for independent examin...
The birth of a beak
...ed from a common ancestor, they had developed into distinct
species based on differences in their beaks-differences which corresponded with their confinement to different islands in the archipelago and their adaptation to different ecological niches. Today, beak shape is considered "a classical example of evo...
Skin stem cells give hairless mice hair
...e stem cells revealed that the bulge contained two distinct
populations of stem cells. One type, called "basal" cells, is active during early development. In contrast the "suprabasal" cells appear only after the first hair generation cycle. This distinction offers biologists an opportunity to compare the two ...
Analysis fingers causes of desertification
...mber of recurrent pathways that include regionally distinct
combinations of factors and feedbacks. Public and individual decisions leading to desertification largely respond to national-scale policies aimed at promoting advanced land-use technologies and creating new economic opportunities. ...
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