High levels of HDL have been linked to increased breast cancer risks and to enhanced cancer aggressiveness in animal experiments. Now, a team of researchers has shown that an HDL receptor found on breast cancer cells may be responsible for this effect.
Scientists have discovered, by studying the genetics of two families severely affected by eating disorders, two gene mutations that are associated with increased risk of developing eating disorders.
James Rothman, 62, of Yale University, Randy Schekman, 64, of the University of California, Berkeley, and Dr. Thomas Sudhof, 57, of Stanford University shared the $1.2 million Nobel prize in medicine for discovering how key substances are transported within cells, a process involved in such important activities as brain cell communication and the release of insulin.
Researchers have suggested a new view of how stem cells may help repair the brain following trauma. In a series of preclinical experiments, they report that transplanted cells appear to build a “biobridge” that links an uninjured brain site where new neural stem cells are born with the damaged region of the brain.
Selectively bred strains of laboratory rats that either prefer or avoid alcohol have been a mainstay of alcohol research for decades. Alcohol-preferring rats voluntarily consume much greater amounts of alcohol than do non-preferring rats. Now, scientists report that a specific gene plays an important role in the alcohol-consuming tendencies of both types of rats.
Men who have low testosterone levels may have a slightly elevated risk of developing or dying from heart disease, according to a recent study. Over time, low testosterone may contribute to an increase in body fat, loss of body hair and muscle bulk.
Researchers at MIT have developed a microfluidic device that mimics the process of extravasation, showing the flow of cancer cells through a system of blood vessels. The extravasation process is a crucial step in cancer metastasis that, until now, has been unclear.
In this edition of Bioscience Technology Update: Surgeons Successfully Implant Bioengineered Vein Genetically Modified Mosquitoes Lose Appetite for Humans Bacteria Ingested Through Yogurt Affects Brain Function Young Genes Can Become Essential for Life
New research reveals how a tiny molecule called mir-79 regulates neural development in roundworms by controlling the correct balance of sugar-transmitters on signaling molecules. If mir-79 does not function, the nervous system is malformed.
Scientists have achieved a major milestone in understanding how genomic "dark matter" originates. This "dark matter"- called non-coding RNA- comprises more than 95 percent of the human genome, but it does not contain the blueprint, or code, for making proteins.
The structure of the brain may predict whether a person will suffer chronic low back pain, according to researchers who used brain scans. The results support the growing idea that the brain plays a critical role in chronic pain, a concept that may lead to changes in the way doctors treat patients.
The process of glycosylation, where sugar molecules are attached to proteins, has long been of interest to scientists, particularly because certain sugar molecules are present in very high numbers in cancer cells. It now turns out that these sugar molecules are not only present, but actually aid the growth of the malignant cells.
In a long-awaited finding, a team of Chinese and US scientists has determined the high-resolution atomic structure of a cell-surface receptor that most strains of HIV use to get into human immune cells. The researchers also showed where maraviroc, an HIV drug, attaches to cells and blocks HIV’s entry.
A research team has become the first to make adult cells from a living organism retreat in their evolutionary development to recover the characteristics of embryonic stem cells. They have also discovered that these embryonic stem cells have a broader capacity for differentiation than those obtained via in vitro culture.
Screening older people for minor memory changes (often called mild cognitive impairment or pre-dementia) may be leading to unnecessary investigation and potentially harmful treatment for what is arguably an inevitable consequence of aging, warn experts.
Patrick McGovern is an archaeologist devoted to studying ancient artifacts and trying to piece together their role in advancing civilization. But his specialty is focused on the origins and expansion of the fermentable beverages of early civilizations, which suits him perfectly as the director of the Biomolecular Archaeology Project at the University of Pennsylvania Museum of Archaeology and Anthropology, Philadelphia.
A genetic mutation that can lead to hemorrhagic stroke has been identified by scientists– along with a drug to potentially treat it. COL4a2 is a protein that is expressed by the gene of the same name, which forms a structure outside the cell called a basement membrane. Scientists have now identified for the first time that accumulation of the mutant protein inside the cell can influence the development of haemorrhagic stroke.
Being short on cash may make you a bit slower in the brain, a new study suggests. People worrying about having enough money to pay their bills tend to lose temporarily the equivalent of 13 IQ points, scientists found when they gave intelligence tests to shoppers at a New Jersey mall and farmers in India.
By lowering the expression of a single gene, researchers have extended the average lifespan of a group of mice by about 20 percent— the equivalent of raising the average human lifespan by 16 years, from 79 to 95. The research team targeted a gene called mTOR, which is involved in metabolism and energy balance, and may be connected with the increased lifespan associated with caloric restriction.
Complex human brain tissue has been successfully developed in a three-dimensional culture system established in an Austrian laboratory. The method allows pluripotent stem cells to develop into cerebral organoids – or "mini brains" – that consist of several discrete brain regions.
Problems with a key group of enzymes called topoisomerases can have profound effects on the genetic machinery behind brain development and potentially lead to autism spectrum disorder (ASD). Scientists at the University of North Carolina School of Medicine have described a finding that represents a significant advance in the hunt for environmental factors behind autism and lends new insights into the disorder’s genetic causes.
Researchers have performed what they believe is the first noninvasive human-to-human brain interface, with one researcher able to send a brain signal via the Internet to control the hand motions of a fellow researcher, using electrical brain recordings and a form of magnetic stimulation.
When mice ate a diet of 25 percent extra sugar– the mouse equivalent of a healthy human diet plus three cans of soda daily– females died at twice the normal rate and males were a quarter less likely to hold territory and reproduce, according to a newly developed toxicity test.
New research has confirmed that everyone on Earth is related to everyone else on the planet, using DNA-based evidence to confirm a mathematical theory. So, the Trojan Family is not just a metaphor. Turns out, we’re also linked by genetics more closely than previously thought.
Though one might think the brains of people who develop Alzheimer’s disease possess building blocks of the disease absent in healthy brains, for most sufferers, this is not true. Every human brain contains the ingredients necessary to spark AD, but the vast majority of people do not and will not develop the neurological condition.