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BRCA1 gene inhibits estrogen and progesterone

It's been known that the breast cancer susceptibility gene BRCA1 regulates use of estrogen in breast and other cells, but now researchers at Georgetown University Medical Center have discovered that it also controls activity of a second sex steroid hormone, progesterone.

27 Jan 2006

New human embryonic stem cells grown in animal cell-free cultures

Scientists working at the WiCell Research Institute, a private laboratory affiliated with the University of Wisconsin-Madison, have developed a precisely defined stem cell culture system free of animal cells and used it to derived two new human embryonic stem cell.

2 Jan 2006

Protein induces dental pulp stem cells into dentin-forming odontoblasts

When dentists examine patients with a damaged tooth that has become infected and abscessed, or filled with tissue-eroding fluid, they typically have two options: Root canal or extraction.

15 Dec 2005

Stem cells may cause some forms of bone cancer

The researchers are the first to identify a population of cells with characteristics of adult and embryonic stem cells in cultures derived from biopsies of patients' bone tumors. They describe their findings in the medical journal Neoplasia.

7 Dec 2005

Cancer cell resistance to chemotherapy drugs - mechanism discovered

Technion-Israel Institute of Technology researchers have discovered new mechanisms developed by cancer cells to become resistant to various chemotherapy drugs.

6 Dec 2005

New anthrax antibody

A new anthrax antibody engineered by scientists at The University of Texas at Austin protects and defends against inhalation anthrax without the use of antibiotics and other more expensive antibodies.

2 Dec 2005

Biologically engineered blood vessels now an option in cardiac bypass

The first-ever human use of completely biologically engineered blood vessels grown from a person's own cells could be an option for people who have vessels too damaged for heart bypass, researchers reported at the American Heart Association's Scientific Sessions 2005.

16 Nov 2005

Resveratrol effective in lowering amyloid-beta peptides

A study published in the November 11 issue of the Journal of Biological Chemistry shows that resveratrol, a compound found in grapes and red wine, lowers the levels of the amyloid-beta peptides which cause the telltale senile plaques of Alzheimer's disease.

7 Nov 2005

Bush wants $7bn to fight bird flu

U.S. president George Bush has called on Congress to approve $7.1 billion in emergency spending to pay for a strategy to prepare America for the danger of a pandemic bird flu outbreak.

2 Nov 2005

Analytical method to trace the lineage trees of cells

Some fundamental outstanding questions in science - "Where do stem cells originate?" "How does cancer develop?" "When do cell types split off from each other in the embryo?" - might be answered if scientists had a way to map the history of the body's cells going back to the fertilized egg.

30 Oct 2005

Morphine withdrawal enhances hepatitis C virus (HCV) replicon expression

Researchers at the University of Pennsylvania have demonstrated that morphine withdrawal complicates hepatitis C by suppressing IFN-alpha-mediated immunity and enhancing virus replication.

30 Oct 2005

Chiron initiates Phase I/II study of an investigational cell culture-derived influenza vaccine

Cell culture-derived influenza vaccine (commonly referred to as "flu cell culture" vaccine) represents the next generation of influenza vaccine, both for annual vaccine production and for long-term pandemic preparedness.

26 Oct 2005

Discovery of molecular roots of asthma, arthritis, and multiple sclerosis

The molecular roots of inflammatory and autoimmune diseases such as asthma, arthritis, and multiple sclerosis (MS) have been discovered by a team of researchers led by The University of Texas M. D. Anderson Cancer Center. They say their findings may point to ways to effectively treat these diseases - if not stop them before they start.

4 Oct 2005

New method to measure circadian cycles

Everyone knows morning people and late-night owls. The variation in individual circadian rhythms is an anecdotal as well as experimentally verified fact. But, until now, to systematically study circadian differences (and thereby hope to rout out the underlying genetic causes), scientists have had to rely on prolonged behavioural observation.

27 Sep 2005

Discovery of molecule that causes transverse myelitis

Hopkins researchers have discovered a single molecule that is a cause of an autoimmune disease in the central nervous system, called transverse myelitis (TM), that is related to multiple sclerosis.

26 Sep 2005

Microchip system aims to reduce the number of animals used in the development of new drugs

Reducing the number of animals used in the development of new drugs is a priority for the pharmaceutical industry

26 Sep 2005

Clioquinol appears to block the genetic action of Huntington's disease

Clioquinol, an antibiotic that was banned for internal use in the United States in 1971 but is still used in topical applications, appears to block the genetic action of Huntington's disease in mice and in cell culture, according to a study reported by San Francisco VA Medical Center (SFVAMC) researchers.

12 Sep 2005

Workshop - stem cells in reproduction and in the brain

"Once we have found the factors by which body cells can be re-programmed into stem cells, then therapeutic cloning might become superfluous," said Hans R. Scholer, director of the Max Planck Institute for Molecular Biomedicine in Munster, Germany, at an international scientific symposium on stem cell research in Kobe, Japan.

10 Sep 2005

Anti-cancer antibodies produced in chickens

A team of researchers have produced the first fully functional, human sequence monoclonal antibodies (mAbs) in chickens.

29 Aug 2005

Asymmetric cell divisions are essential for skin development

It took almost 10 years for Elaine Fuchs, Ph.D., a Howard Hughes Medical Institute investigator at Rockefeller University, to find a postdoctoral fellow who shared her curiosity for the direction of cell divisions in the skin.

18 Aug 2005