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Tag: "relationship" at biology news

Buildup of damaged DNA in cells drives aging

...he study. How the researchers came to study the relationship between DNA damage and aging began almost serendipitously in the late 1990s while Dr. Niedernhofer was a post-doctoral fellow in Dr. Hoeijmakers?laboratory at Erasmus Medical Center, a well-known European center for medical genetics, including the di...

Getting to the heart of the heart

...e two laboratories are now trying to determine the relationship between the two types of progenitor cells discovered. Both papers will appear in the December 15 issue of the journal Cell, which was published online November 22. The Children's team, led by senior investigator Stuart H. Orkin, MD, a Howard Hughes...

Temperament linked to onset of cancer and early death in female rats

...mones and Behavior. Current human studies on the relationship between cancer and personality primarily focus on survival once a tumor has been identified. "Human studies may need to consider more basic behavior traits than those already considered," McClintock explained. By understanding the development of ba...

History-hunting geneticists can still follow familiar trail

...onstrate the African origin of our species and the relationship between living humans and the Neanderthals," said Connie Mulligan, an associate professor of anthropology in the College of Liberal Arts and Sciences and an assistant director of the UF Genetics Institute. "MtDNA data have also been used to establish...

Researchers examine why food tastes bad to chemotherapy recipients

...fect levels of iron and copper in water, and their relationship to health-based problems such as persistent metallic tastes of patients receiving chemotherapy. They hope to identify the cause of the metallic flavor in the mouth when drinking water contains metal ions, specifically iron and copper. Their researc...

Mirrors in the mind: New studies elucidate how the brain reflects onto itself the actions of others

... scored lower on the empathy evaluation. While the relationship between motor mirror systems and empathy skills is far from clear, these findings are consistent with the existence of a link between the two. Though mirror neurons appear to relate--and, potentially, equate--the actions of oneself with those of an...

High HPV concentrations combined with smoking significantly raise risks of cervical cancer

... causative effect. The researchers also found a relationship between smoking duration and cancer. "We found a statistically significant multiplicative interaction between the duration of smoking and HPV presence causing cervical cancer," Gunnell said. "One explanation for this interaction could involve the inf...

The biggest bug in gut discomfort

In spite of our long and painful relationship with Campylobacter jejuni, we are just starting to answer basic questions about the bug that is the leading cause of bacterial food-borne illness in the United States, and one of the most common causes of diarrhea worldwide. The Centers for Disease C...

Genetic study of Neanderthal DNA reveals early split between humans and Neanderthals

...mans. The study helps to explain the evolutionary relationship between Homo sapiens and Neanderthals (Homo neande...a from the HapMap genome project to understand the relationship between modern human diversity and the Neanderthal sequence. Their analysis showed that the Neandert...

Mayo discovers protein as potential tactic to prevent tumors

... in the death of the cell. This protein-to-protein relationship invites targeted drug intervention to control unregulated growth of cancer cells. "Quality control within dividing cells is essential because mistakes during duplication of the genetic code can lead to cancer," says Donald Tindall, Ph.D., co-leade...

Plant-derived molecules, genetic manipulation point to future chemoprevention methods

..."This study takes our work further, establishing a relationship between CDDO-ME triterpenoids, which are also effective anti-inflammation and anti-cancer compounds, and LG100268." The triterpenoid CDDO-ME had already been proven effective in inhibiting proliferation and inducing apoptosis (programmed cellular ...

Inheritance outside DNA

...ion abnormalities, that a precise cause-and-effect relationship between cancer and epigenetic alterations has been difficult to pin down, says Andrew Feinberg of the John Hopkins School of Medicine, who has been a pioneer in unraveling the epigenetics of cancer. Now Feinberg has taken a new look at genomic im...

Protein splicing upsets the DNA colinearity paradigm

...search problems often relies on the direct, linear relationship between the sequence of a protein and the DNA encoding that protein. In fact, colinearity of DNA and protein sequences is thought to be a fundamental feature of the universal genetic code. However, a paper published today in Science by a team from th...

Ocean seep mollusks may share evolutionary history with other deep-sea creatures

...ther mystery involving seep animals: what is their relationship to whale falls? Whale falls, the slowly decaying remains of large whales sunk to the ocean's depths, harbor yet another unique chemical community similar to that in vents and seeps. Some researchers suggest that whale falls were evolutionary "stepp...

GlycoFi and Dartmouth report full humanization of yeast glycosylation pathway in Science

...reactions, had allowed the scientists to study the relationship between specific glycosylation structures on antibodies and their killing activity on cancer cells. Using this technology, the team had identified glycosylation structures that significantly improved an antibodies ability to kill cancer cells compare...

Selecting life: Scientists find new way to search for origin of life

... have pairs of crystal surfaces that have a mirror relationship to each other, called left and right faces. Calcite, one such mineral, is common today and was prevalent during the Archean Era when life first emerged. In 2001 Hazen and colleagues performed the first experiments showing that the left-handed amino a...

New brain-chemistry differences found in depressed women

... "Further research on these differences, and their relationship to patients' responses to various depression treatments, is crucial to the continued improvement in the understanding of depression and the development of better treatment strategies for patients," Zubieta says. ...

Vanishing beetle horns have surprise function

...ts examined literature describing the evolutionary relationship of 47 Onthophagus species. They also studied the development of eight beetle species in the laboratory (seven Onthophagus species and one species from the closely related but hornless genus Oniticellus). The scientists found that all seven Onthop...

Discovery in the evolution of the immune system absorbing cells

.... The work concludes that there is an evolutionary relationship between macrophages and cells by which both cell types derive from a common, ancestral cell with functional properties of both cells. So though the B cells of lower vertebrates (fish and amphibians) are still capable of phagocytis while they are prod...

Molecular 'marker' on stem cells aids research, perhaps therapies

... team also are investigating the SSEA-4 molecule’s relationship to cancer stem cells, those cells in a tumor that behave like stem cells in that they self-renew and maintain the cancer even if most of the tumor is destroyed by radiation or chemotherapy. “Is the expression of this marker elevated in a tumor" I...

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