Manganese Key To Radiation-Proofing Of Organisms

Exploring methods to protect living organisms from chronic or acute doses of radiation, military researchers say they have uncovered how an unusual bacterium manages to deal with radiation exposure that would kill any other living creature.

Describing their work in PLoS Biology, the researchers from the Uniformed Services University of the Health Sciences (USU) say their discovery could lead to new avenues of exploration for radioprotection in diverse settings.

In the past, efforts to protect against ionizing radiation have focused on DNA damage and repair, but the bacterium in question – Deinococcus radiodurans – has nothing obviously unusual in its DNA repair components and employs quite a different method, relying instead on protein oxidation.

Investigating the mechanism behind this, USU’s Michael J. Daly found that resistant bacterial cells had significantly different metal concentrations, pointing to high levels of manganese and low iron levels as possible influences on cellular recovery following irradiation. Daly’s team showed that the most resistant bacterial species contained approximately 300 times more manganese and three times less iron than the most sensitive species.

In the new study, which examined the consequences of this disparity, the researchers demonstrated that high cytosolic manganese and low iron concentrations enable resistance by protecting proteins, but not DNA, from ionizing radiation-induced oxidative damage.

The findings point to new avenues of exploration for protection from radiation, which could eventually influence how individuals are treated for exposure to chronic or acute doses of radiation. In the civilian sector, this may mean better outcomes from radiation therapy and new ways to contain toxic runoff from radioactive Cold War waste sites.

Related articles:
Exotic Underground Bacteria Thrive On Radiation Rather Than Sunlight
Radiation Resistant Organism Reveals Its Secrets
The Race To Understand Skin Cancer

Source: Henry M. Jackson Foundation for the Advancement of Military Medicine

, ,

Comments are closed.

ID-1 (ИД-1) original USSR soviet dosimeter radiation detector picture

ID-1 (ИД-1) original USSR soviet dosimeter radiation detector

$9.50



Shungite Bracelet, Shungite nugget, Stretch Bracelet,Radiation EMF Protection picture

Shungite Bracelet, Shungite nugget, Stretch Bracelet,Radiation EMF Protection

$12.45



6 mm Shungite Bracelet Stretchy One Size 5G WiFi Radiation EMF Protection - 1 pc picture

6 mm Shungite Bracelet Stretchy One Size 5G WiFi Radiation EMF Protection - 1 pc

$13.99



NUCLEAR RADIATION SYMBOL PATCH WARNING ZOMBIE DANGER embroidered iron-on UFO picture

NUCLEAR RADIATION SYMBOL PATCH WARNING ZOMBIE DANGER embroidered iron-on UFO

$4.99



VINTAGE 1960s CAUTION RADIATION AREA  ATOMIC BOMB MISSILE ARMY BASE METAL SIGN picture

VINTAGE 1960s CAUTION RADIATION AREA ATOMIC BOMB MISSILE ARMY BASE METAL SIGN

$40.00



Greentest Eco 6 Radiation + Nitrate detector Fruit Vegetable Fish geiger counter picture

Greentest Eco 6 Radiation + Nitrate detector Fruit Vegetable Fish geiger counter

$184.23



Nuclear Radiation Detector for Smartphone iOS Android Smart Geiger Counter picture

Nuclear Radiation Detector for Smartphone iOS Android Smart Geiger Counter

$59.90



Canberra Dosimeter Radiac Set AN/UDR-13 Military Pocket Radiation Alarm picture

Canberra Dosimeter Radiac Set AN/UDR-13 Military Pocket Radiation Alarm

$349.00



Soviet Poster Stalker Nuclear War Chernobyl Radiation Protection Vintage USSR №9 picture

Soviet Poster Stalker Nuclear War Chernobyl Radiation Protection Vintage USSR №9

$29.95



Soviet Poster Stalker Nuclear War Chernobyl Radiation Protection Vintage USSR 30 picture

Soviet Poster Stalker Nuclear War Chernobyl Radiation Protection Vintage USSR 30

$29.72



Powered by WordPress. Designed by WooThemes