Too much of a good thing
Excessive DNA repair can lead to retinal degeneration

Image courtesy / Samson Laboratory
MIT researchers found that mice with normal DNA repair systems had
more retinal degeneration upon exposure to environmental toxic agents
than mice lacking a certain DNA repair system. At right, the cross section
of the retina from a mouse lacking the repair system is normal. At left, mice
with too much DNA repair have greatly reduced numbers of cells in the OPL
(outer plexiform layer) and ONL (outer nuclear layer).

Neuroscientists ID source of cognitive decline in aging brains
Memory suffers when brain-communication network decays

VIAGRA’S OTHER TALENTS: TO HELP A ‘SIGNALING’ PROTEIN SHIELD THE HEART FROM HIGH BLOOD PRESSURE DAMAGE

Prolonged Nevirapine in Breast-Fed Babies Prevents HIV Infection But Leads To Drug-Resistant HIV

Gold particles deliver more than just glitter
Nanoparticles could carry drugs to treat cancer, other diseases

The top image shows a mixture of gold nanoparticles. The longer particles are called
nanobones, and the smaller are nanocapsules. Bottom left: After the nanoparticles are
hit with 800 nanometer wavelength infrared light, the nanocapsules melt and release their
payload. Nanobones remain intact. Right: After the nanoparticles are hit with 1100 nanometer
wavelength infrared light, the nanobones melt and release their payload. Nanocapsules
remain intact. Image / Andy Wijaya

WHY PROSTATE CANCER PATIENTS FAIL HORMONE DEPRIVATION THERAPY

BRIGHT LIGHTS, NOT-SO-BIG PUPILS