Cell Nucleus News and Research

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Discovery of key decision-point at which cells with broken DNA repair themselves or die

When cells undergo potentially catastrophic damage, for example as a result of exposure to ionizing radiation, they must make a decision: either to fix the damage or program themselves for death, a process called apoptosis.

12 Apr 2009

Researchers explain process by which cells 'hide' potentially dangerous DNA segments

The DNA in the 23 pairs of chromosomes in each of the billions of cells of the human body is so tightly packed that it would measure six feet in length if stretched end to end.

12 Apr 2009

Experimental drug lowers PSA levels

A new multi-center study shows that an experimental drug lowers prostate specific antigen (PSA) levels – a marker for tumor growth – in men with advanced prostate cancer for whom traditional treatment options have failed.

9 Apr 2009

New type of probe enables visualization of single ribonucleic acid

Biomedical engineers have developed a new type of probe that allows them to visualize single ribonucleic acid (RNA) molecules within live cells more easily than existing methods.

6 Apr 2009

Researchers discover structure-building role for 2 non-coding RNAs

Most of the DNA in the nucleus of each of our cells is converted into RNA, but only a small fraction of these RNA molecules serve as coding templates for the synthesis of proteins.

2 Apr 2009

Blocking hunger hormone helps fight cocaine addiction

UC Irvine pharmacological researchers have discovered that blocking a hormone related to hunger regulation can limit cocaine cravings.

1 Apr 2009

Gene scan shows body's sleep cycle influences numerous physical functions

The pineal gland - integral to setting the body's sleep and wake cycles - may be involved in a broad range of bodily functions, according to a study by researchers at the National Institutes of Health and other institutions.

30 Mar 2009

Discovery of protein that reactivates latent herpes simplex virus

Research in Public Library of Science (PLoS) Pathogens appears to solve a long standing medical mystery by identifying a viral protein, VP16, as the molecular key that prompts herpes simplex virus (HSV) to exit latency and cause recurrent disease.

29 Mar 2009

DNA repair mechanisms relocate in response to stress

Like doctors making house calls, some DNA repair enzymes can relocate to the part of the cell that needs their help, a collaborative team of scientists at Emory University School of Medicine has found.

29 Mar 2009

The egg makes sure that sperm don't get too old

In contrast to women, men are fertile throughout life, but research at the Sahlgrenska Academy, University of Gothenburg, Sweden, has now shown that a fertilising sperm can get help from the egg to rejuvenate. The result is an important step towards future stem cell therapy.

25 Mar 2009

Activity in one brain structure can predict people's preferences

The study shows that even when people rate options similarly, they will choose the one that causes more activation in the caudate nucleus, a brain region involved in anticipating reward.

24 Mar 2009

New strategy for fighting persistent bacterial infections

Researchers at National Jewish Health have discovered a promising strategy for destroying the molecular scaffolding that can make Pseudomonas bacterial infections extremely difficult to treat in cystic fibrosis patients, wearers of contact lenses, and burn victims.

23 Mar 2009

Scientists make a new protein from scratch

No doubt proteins are complex. Most are "large" and full of interdependent branches, pockets and bends in their final folded structure.

23 Mar 2009

Insights into Parkinson's disease and deep-brain stimulation

About the only thing doctors have understood about deep-brain stimulation, which is widely used to treat Parkinson's disease symptoms, is that somehow it works for many patients.

20 Mar 2009

Drug being used to improve cognition affects dopamine, suggesting potential for abuse

Preliminary research in healthy men suggests that the narcolepsy drug modafinil, increasingly being used to enhance cognitive abilities, affects the activity of dopamine in the brain in a way that may create the potential for abuse and dependence, according to a study in the March 18 issue of JAMA.

17 Mar 2009

University of Florida doctors test targets for Parkinson surgery

Doctors may be able to tailor a specialized form of brain surgery to more closely match the needs of Parkinson patients, according to results from the first large-scale effort to compare the two current target areas of deep brain stimulation surgery, or DBS.

15 Mar 2009