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Quantum dots outline brain tumors for surgical removal

Although surgical removal of a tumor can be the most effective way of treating brain cancer, neurosurgeons are often faced with the dilemma of determining the exact border between a tumor and the healthy tissue that surrounds it.

14 Jun 2007

Nanoparticle-enabled peptide delivery triggers tumor regression

Cells possess a variety of ways of dealing with mutations that can cause them to grow uncontrollably and eventually form a tumor. The tumor suppressor gene p53 plays a critical role in these cancer prevention processes, largely by triggering a form a cell death known as apoptosis.

14 Jun 2007

Nanoprobes with near-infrared persistent luminescence for in vivo imaging

In a new take on use of luminescent nanoparticles as cancer imaging probes, a team of investigators from several research institutes in Paris, France, has developed new metal-containing nanoparticles that emit light for several hours after they are initially excited.

14 Jun 2007

Interfacing silicon nanowires with mammalian cells

A research team at the University of California, Berkeley, has achieved a significant step toward one of the futuristic goals of nanomedicine and nanobiology-developing technology for "wiring" together individual cells.

14 Jun 2007

Hybrid gold-dendrimer nanoparticles target and image tumors

Dendrimer nanoparticles, made of spherical, highly branched polymers, have shown promise as drug delivery vehicles capable of targeting tumors with large doses of anticancer drugs.

14 Jun 2007

Double-duty nanoparticles overcome drug resistance in tumors

Cancer cells, like bacteria, can develop resistance to drug therapy. In fact, research suggests strongly that multidrug resistant cancer cells that remain alive after chemotherapy are responsible for the reappearance of tumors and the poor prognosis for patients whose cancer recurs.

14 Jun 2007

Scientists observe cell migration

Johns Hopkins researchers have found a way to directly observe cell migration -- in real time and in living tissue. In a report in Developmental Cell, the scientists say their advance could lead to strategies for controlling both normal growth and the spread of cancer, processes that depend on the programmed, organized movement of cells across space.

14 Jun 2007

New drug-delivery system using nanomaterials

Researchers at UCLA have successfully manipulated nanomaterials to create a new drug-delivery system that promises to solve the challenge of the poor water solubility of today's most promising anticancer drugs and thereby increase their effectiveness.

8 Jun 2007

Scientists look at slow-freezing techniques for human tissue

The goal is to make human eggs, ovarian tissue, blood vessels, even whole organs available when needed.

8 Jun 2007

Embryonic stem cells can be created without eggs

Embryonic stem cells are unique because they can develop into virtually any kind of tissue type, an attribute called pluripotency.

8 Jun 2007

Discovery of new survival mechanism in common bacteria

Researchers at the National Institute of Allergy and Infectious Diseases (NIAID), a component of the National Institutes of Health, have discovered a survival mechanism in a common type of bacteria that can cause illness.

8 Jun 2007

New bacterium discovered, Bartonella rochalimae

A close cousin of the bacterium that debilitated thousands of World War I soldiers has been isolated at UCSF from a patient who had been on an international vacation.

8 Jun 2007

Mouse hibernation hormones described

A key hormone enables starving mice to alter their metabolism and “hibernate” to conserve energy, revealing a novel molecular target for drugs to treat human obesity and metabolic disorders, UT Southwestern Medical Center researchers have found.

8 Jun 2007

Researchers track how spores break out of dormant state

Tapping into the unknown world of awakening dormant bacterial spores, researchers have revealed through atomic force microscopy (AFM) the alterations of spore coat and germ cell wall that accompany the transformation from a spore to a vegetative cell.

5 Jun 2007