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Tag: "within" at biology news

Novel computed imaging technique uses blurry images to enhance view

...n understanding of the physics of light-scattering within the sample. "ISAM has the potential to broadly impact real-time, three-dimensional microscopy and analysis in the fields of cell and tumor biology, as well as in clinical diagnosis where imaging is preferable to biopsy," said Boppart, who is also a...

Baby fish 'smell their way home'

...es are swept off their home reef by ocean currents within days of hatching. Ordinarily you'd expect them to...er from four different reefs. To their amazement, within minutes a surprisingly high percentage of baby fish had congregated in the water flow from their hom...

Liposuctioned fat stem cells to repair bodies

...covery. "If you intervene, with cell transplants, within one week, you can repair the lesion," Galli notes. Like horses, humans are also vulnerable to joint injuries, and rehabilitations are long and costly. Now experience with horses is paving the way to cell therapies for sport-related tendon injuries i...

Scientists identify specific enzymes that make meningitis hard to fight

...nalities that act in different DNA repair pathways within the pathogen." Professor Christoph Tang from Imperial's Division of Investigative Science added: "After realising that the two enzymes had distinct roles repairing different types of DNA damage, were able show the pathogen can 'fend off' different...

Multiple malaria infection inhibits spread of parasite

...s into the development and maintenance of immunity within the population. ...

New culture method for hepatitis C virus uses primary hepatocytes and patient serum

...on in much of the U.S. Study of HCV replication within liver cells, or hepatocytes, has been hampered by a lack of adequate virus culture systems. Some systems allow the virus to infect cells but do not permit prolonged replication and production of virus, while other systems rely on derivatives of perm...

Engineering the heart piece by piece

...f a factory-made one. These possibilities are all within reach, and could transform the way heart care is d... as the cells multiplied and organized into tissue within a few days. Tests showed that the BEHM was capable of generating pulsating forces and reacting to st...

Common mechanisms for viral DNA replication

...icult to investigate in eukaryotes,where it occurs within the confines of the double-membrane nucleus. However, the process is far easier to study in the much simpler virus. In simian virus 40 (SV40), the large T-antigen protein (T-ag) is responsible for recognizing DNA sequences required to start replicati...

Bird flu -- Call for antiviral drugs to be shared

... in which countries use their antiviral drugs only within their borders, limited worldwide sharing of antiviral drugs would slow down the spread of a flu virus by many months, to the benefit of both drug donors and recipients. ...

Blocking immune cell action increases Alzheimer's-associated protein deposits

...them from the bloodstream to sites of inflammation within the brain. Since CCR2 is known to bind chemokines, proteins that attract immune cells and are elevated in brains affected by Alzheimer's, the receptor could be important for the movement of microglia to the site of amyloid-beta deposits. To test tha...

Reactivated gene shrinks tumors

... blood cells, the cancer cells underwent apoptosis within 1 or 2 days of the p53 reactivation. In contrast, sarcomas (which affect connective tissues) did not undergo apoptosis but went into a state of senescence, or no growth. Those tumors took longer to shrink but the senescent tumor cells were eventu...

Protein found that slows hepatitis C growth in liver cells

...way that regulates the growth of hepatitis C virus within the cell,?said Dr. Stanley M. Lemon, director of the National Institutes of Health-funded Hepatitis C Research Center at UTMB and of the academic medical center’s Institute for Human Infections and Immunity. Lemon, senior author of the Journal of Bio...

Genomics throws species definition in question for microbes

...ited to: The establishment of a subcommittee within the International Committee on Systematics of Prokaryotes to consider a paradigm shift in the species definition. The need for more thorough study of the mechanisms of speciation before a more meaningful and practical species theory can be devel...

Stem cell therapy shows promise in regenerating damaged muscle in heart attack patients

...nistered an infusion of either Provacel or placebo within 10 days of having a heart attack and are being followed for 2 years. To prevent bias, neither the patient nor the physician knows who received the stem cell treatment and who received placebo. Rush principal investigator cardiologist Dr. Gary Sch...

Common parasitic infection leads to increased risk for HIV infection

.... Trichomoniasis can cause tiny areas of bleeding within mucous membranes that could provide a physical pathway for HIV infection. Also, the study noted, the T. vaginalis parasite has been shown to break down an enzyme that blocks HIV attachment to cells. The findings from this study provide support fo...

Cancer scientists create 'human' leukemia process to map how disease begins, progresses

...ound to focus on asking which are the normal cells within which the disease arises and then how it evolves and progresses, all within the context of human cells. "So what we are building is a new approach and way of studying how ...

Stem cell therapy shows promise for rescuing deteriorating vision

...They maintain their own identity, but they migrate within the outer and inner retina" where they seem to confer some protection to the light-sensing cells that typically die in the course of degenerative eye disease. For researchers, the work is intriguing because the progenitor cells come from the brain...

Immunization rates hit record high in poor countries

...id-like insect, the adelgid kills eastern hemlocks within a few years after infestation, feeding on the sap at base of their needles and cutting off their nutrients. While the adelgid, originally from Japan and China, appears to have no successful predators in North America, some native fungi—like the on...

Widely used iron nanoparticles exhibit toxic effects on neuronal cells

...them stick selectively to tumors and other targets within the body. The particles can also be made to carry anti-cancer drugs or radioactive materials directly to a tumor. Magnetic nanoparticles designed to attach to cancerous tissue can also be made to heat up by using a remote, alternating magnetic field,...

Fungal factories may save hemlock forests

...id-like insect, the adelgid kills eastern hemlocks within a few years after infestation, feeding on the sap at base of their needles and cutting off their nutrients. While the adelgid, originally from Japan and China, appears to have no successful predators in North America, some native fungi—like the on...

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