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The protein TAZ sends 'mixed signals' to stem cells

Just as beauty exists in the eye of the beholder, a signal depends upon the interpretation of the receiver. According to new USC research published in Stem Cell Reports, a protein called TAZ can convey very different signals -- depending upon not only which variety of stem cell, but also which part of the stem cell receives it. When it comes to varieties, some stem cells are "naïve" blank slates; others are "primed" to differentiate into certain types of more specialized cells. Among the truly naïve are mouse embryonic stem cells (ESCs), while the primed variety includes the slightly more differentiated mouse epiblast stem cells (EpiSCs) as well as so-called human "ESCs" -- which may not be true ESCs at all. In the new study, PhD student Xingliang Zhou and colleagues in the laboratory of Qi-Long Ying demonstrated that naïve mouse ESCs don't require TAZ in order to self-renew and produce more stem cells. However, they do need TAZ in order to diff...
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Yoga, meditation improve brain function and energy levels, study shows

Practicing brief sessions of Hatha yoga and mindfulness meditation can significantly improve brain function and energy levels, according to a new study from the University of Waterloo. The study found that practicing just 25 minutes of Hatha yoga or mindfulness meditation per day can boost the brain's executive functions, cognitive abilities linked to goal-directed behavior and the ability to control knee-jerk emotional responses, habitual thinking patterns and actions. "Hatha yoga and mindfulness meditation both focus the brain's conscious processing power on a limited number of targets like breathing and posing, and also reduce processing of nonessential information," said Peter Hall, associate professor in the School of Public Health & Health Systems. "These two functions might have some positive carryover effect in the near- term following the session, such that people are able to focusmore easily on what they choose to attend to in everyday life....
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