Researchers at UC San Diego and UC Irvine have found evidence that supports the theory that reproductive competition during the evolution of primate species has occurred at the level of sperm cell motility.

A team led by Michael Berns, an adjunct professor of bioengineering at UCSD and a professor of biomedical engineering at the Beckman Laser Institute at UC Irvine, and UCSD Ph.D.

Cryptochromes, which fulfill the molecular requirements for sensing the magnetic reference direction, have recently been found in retinal neurons of migratory birds (Mouritsen et al., PNAS, 2004). Furthermore, studies investigating what parts of a migratory bird´s brain are active when the birds use their magnetic compass showed that the cryptochrome-containing neurons in the eye and a forebrain region (“Cluster N”; Mouritsen et al., PNAS, 2005; Liedvogel et al., EJN, 2007) are highly active during processing of magnetic compass information in migratory birds. Sensory systems process their particular stimuli along specific brain circuits.

Researchers say they have found a key biochemical cycle that suppresses the immune response, thereby allowing cancer cells to multiply unabated. The research shows how the biomolecules responsible for healthy T-cells, the body’s first defenders against hostile invaders, are quashed, permitting the invading cancer to spread. The same cycle could also be involved in autoimmune diseases such as multiple sclerosis.

The scientists used special molecular “nanosensors” for the work.

“We used a technique called fluorescence resonance energy transfer, or FRET, to monitor the levels of, tryptophan, one of the essential amino acids human cells need for viability,” explained lead author and Carnegie Institution Department of Plant Biology scientist Thijs Kaper.

Do you like The Beatles but only certain kinds of their songs? What if you want music to go jogging but you don't know the names of artists you might like for that?

UC San Diego researchers are working on a music search engine that lets you use natural language to find what you want.

In a new paper, the researchers demonstrate that an online music game they created provides crucial data for building the back-end of a music search engine that allows users to type in words in order to find songs.

“When my mom gets up in the morning and is like, ‘I need some energy to go jogging,’ she has no clue what title or artist is going to help her with that,” said Gert Lanckriet, the UCSD electrical engineering professor overseeing the project.

Although anorexia nervosa is categorized as an eating disorder, it is not known whether there are alterations of the portions of the brain that regulate appetite.

Now, a new study finds that women with anorexia have distinct differences in the insulta – the specific part of the brain that is important for recognizing taste – according to a new study by University of Pittsburgh and University of California, San Diego researchers.

The study also implies that there may be differences in the processing of information related to self-awareness in recovering anorexics compared to those without the illness – findings that may lead to a better understanding of the cause of this serious and sometimes fatal mental disorder.

Understanding whether inbreeding accounts for early mortality is a long-standing concern in demographic research. Analyzing Bedouin villages in Bekaa, Lebanon, in which the marriage rate among first cousins is more than twice the national average, a new study finds that the greatest single determinant of infant mortality is not closely related parents – though this does present a significant risk – but short birth intervals.

The Bekka Bedouin are Sunni Muslims.