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Science News for June 17, 2010


In predominantly black communities, people of all races miss out on kidney care

A study found that patients living in predominantly black areas are less likely to receive pre-dialysis kidney care from a specialist, despite having declining kidney function. The researchers investigated the effect of residential area racial composition on access to and quality of kidney-related care before starting dialysis.

SourceAmerican Society of Nephrology·JournalJournal of the American Society of Nephrology·DateJun 17, 2010

Damselfish 'garden' algae

Researchers discovered damselfish selectively weed algal gardens to promote Polysiphonia growth, reducing competition from other algae. This 'gardening' behavior leads to a mutualistic association between the fish and Polysiphonia, showcasing cultivation mutualism in non-terrestrial habitats.

SourceBMC (BioMed Central)·JournalBMC Evolutionary Biology·DateJun 17, 2010

Body-image distortion predicts onset of unsafe weight-loss behaviors

Research by University of Illinois expert Janet Liechty finds that body-image distortion is a better screening tool to identify non-overweight girls at risk for unsafe weight-loss practices. Girls with distorted body-image are more likely to resort to dieting and extreme methods, increasing their risk of continued use.

SourceUniversity of Illinois at Urbana-Champaign, News Bureau·JournalJournal of Adolescent Health·DateJun 17, 2010

Medicare cuts increase cancer treatments, study finds

A new study by Harvard Medical School researchers found that Medicare cuts to physician payments for outpatient chemotherapy drugs increased treatment rates among Medicare recipients. The study analyzed data from 222,478 beneficiaries with lung cancer and found a 2.4% increase in chemotherapy treatment within one month of diagnosis.

SourceHarvard Medical School·JournalHealth Affairs·DateJun 17, 2010

Neonatal diarrhea

A nationwide study published in the World Journal of Gastroenterology found that diarrhea is a relatively uncommon but insidious condition underlying various illnesses in neonates. The study highlights the importance of recognizing rare chronic cases and advocating specific guidelines for managing diarrheal disorders in neonates.

SourceWorld Journal of Gastroenterology·JournalWorld Journal of Gastroenterology·DateJun 17, 2010

New complication seen in stem cell therapy

Researchers found a new complication of stem cell therapy: angiomyeloproliferative lesions at injection sites, which can lead to kidney failure and death. The study highlights the need for further research to determine the circumstances that cause these masses to form and strategies to avoid them.

SourceAmerican Society of Nephrology·JournalJournal of the American Society of Nephrology·DateJun 17, 2010

Signal like you mean it

A new study reveals that orangutan gestures carry specific intentional meanings and are made with the expectation of behavioral responses. The researchers identified 64 gesture types, 40 of which were used predictably to achieve six social goals, including initiating interactions and requesting objects.

SourceSpringer·JournalAnimal Cognition·DateJun 17, 2010

Alternative pathway to malaria infection identified

Researchers have identified the complement receptor 1 (CR1) as an alternative protein used by the malaria parasite to invade red blood cells. This finding has significant implications for the development of a vaccine against malaria, and may help prevent the proliferation of parasites that rely on this pathway.

SourcePenn State·JournalPLOS Pathogens·DateJun 17, 2010

When do newborns first feel cold?

A new study suggests that newborn mice develop cold sensing neural circuits around two weeks after birth, indicating a delay in the maturation of this circuit. This finding provides insight into the development of cold sensing and its potential impact on human health, particularly in children with altered temperature sensitivity.

SourceUniversity of Southern California·JournalNeuroscience·DateJun 17, 2010

Brain study shows that the opinions of others matters

Researchers found that when people agree with our opinions, the 'reward' area of the brain is activated, indicating a satisfying experience. The study used fMRI to examine brain activity in response to expert opinions on music preferences, finding that agreement tends to increase brain reward activity.

SourceWellcome Trust·JournalCurrent Biology·DateJun 17, 2010

The experience of arterial reconstruction in adult-to-adult living donor liver transplantation

Hepatic artery thrombosis (HAT) is a significant complication of adult-to-adult living donor liver transplantation. Researchers report successful use of running sutures with intimal eversion to reduce HAT incidence. Atraumatic microsurgical techniques and careful stoma sizing also contribute to graft survival.

SourceWorld Journal of Gastroenterology·JournalWorld Journal of Gastroenterology·DateJun 17, 2010

Fuzzy logic predicts cell aging

A new study uses fuzzy logic to predict how cell aging progresses, uncovering a protective and adaptive mechanism that extends lifespan. The model helps decipher the underlying connections and networks in cellular mechanisms, offering insights into age-related diseases.

SourceBoston Children's Hospital·JournalPLOS Computational Biology·DateJun 17, 2010