How exercise improves memory - June 24, 2016
The hippocampus in the brain switches to fat as an energy source after glucose is depleted from exercise), leading to release of BDNF, associated with cognitive improvement. Researchers have found out how.
Physical exercise after learning improves memory and memory traces if the exercise is done four hours later, and not immediately after learning, according to findings recently reported (open-access) in the Cell Press journal Current Biology.
It’s not yet clear exactly how or why delayed exercise has this effect on memory. However, earlier studies of laboratory animals suggest that naturally occurring chemical compounds in the body known as catecholamines, including dopamine and norepinephrine, can improve memory consolidation, say the researchers at the Donders Institute at the Radboud University Medical Center in the Netherlands. One way to boost catecholamines is through physical exercise.
A stem-cell repair system that can regenerate any kind of human tissue
...including disease and aging; human trials next year
April 6, 2016
UNSW researchers say the therapy has enormous potential for treating spinal disc injury and joint and muscle degeneration and could also speed up recovery following complex surgeries where bones and joints need to integrate with the body (credit: UNSW TV)
Chinese team genetically modifies human embryo, using CRISPR gene-editing technique
Chinese researchers have genetically modified a human embryo using CRISPR/Cas9, the gene editing technique, using embryos that carried an extra set of chromosomes (so they were not viable) — hoping to learn more about the possibility of producing human babies that would be immune to HIV.
The Chinese team reports in the Journal of Assisted Reproduction and Genetics that they obtained 213 fertilized eggs from a fertility clinic, which had been deemed unsuitable for in vitro therapy.* They used the eggs to study a mutation that causes damage to an immune cell gene called CCR5 (this type of cell, when damaged naturally, has been found to lead to HIV resistance).