Science blog
Orbital mechanics affect methane levels
Antarctic lake keeps its secrets for now
How snakes lost their legs
Researchers ponder cancer origins
Forming social networks a no-brainer
'Niceness' partly genetic, say scientists
Omega-3 may keep blindness at bay
Coral shines light on rainfall records
Old bone proves Lucy was no swinger
Scientists unlock cosmic ice riddle
Study links pesticides to Parkinson's
Digital world growing faster every year
Energy drinks put kids at risk: report
Robotics speed up cancer drug development
Zinc cuts short the common cold
Counting kicks in at 18 months
NASA spacecraft unravels comet mystery
Astronomers dig up cannibalised galaxy
Study links extreme weather to climate change
Turkey quake gives warning clues
US scientists build first 'antilaser'
Website meltdown leaves scientists fuming
Earth 'unrecognisable' by 2050: experts
Canola fungus genome unravelled
—мотреть каталог Ёйвон здесь: | —мотрим тут: |
Study links pesticides to Parkinson's
US researchers say they have found people who used two specific varieties of pesticide were more likely to develop Parkinson's disease.

The study, which appears in the journal Environmental Health Perspectives, shows people who used either rotenone or paraquat are about two-and-a-half times more likely to develop Parkinson's than people who never used either pesticide.

"Rotenone directly inhibits the function of the mitochondria, the structure responsible for making energy in the cell," says study co-author Dr Freya Kamel, a researcher at the US National Institute of Environmental Health Sciences .

"Paraquat increases production of certain oxygen derivatives that may harm cellular structures. People who used these pesticides or others with a similar mechanism of action were more likely to develop Parkinson's disease," says Kamel.

The study examined 110 people with Parkinson's disease and 358 people who served as a control group from the Farming and Movement Evaluation (FAME) Study. FAME is part of the larger Agricultural Health Study looking at the health of approximately 90,000 licensed pesticide applicators and their spouses.
Link suspected for a while

Associate Professor Kay Double of Neuroscience Research Australia, say the study backs earlier studies implicating pesticides in the development of Parkinson's disease.

"We've known for a long time that there is an increased risk of Parkinson's disease of people who live in rural environments compared to people who live in cities," says Double. "It's been expected that would come down to some sort of environmental influences."

Double, whose research includes studying how and why brain cells die due to Parkinson's disease, says studies such as these will benefit research.

"Some of the biochemical mechanisms that we know occur in the Parkinson's disease brain ... are things that are affected by these pesticides," she says.

"[This study] is giving us more of a handle on what might be happening in the brain to cause someone to develop Parkinson's disease."
Pesticides under review

Jo Immig of the National Toxics Network says the findings are concerning, as both chemicals are used in Australia.

"This latest study is a very credible study that raises significant concerns about several pesticides that are used in Australia that may be contributing to Parkinson's disease," says Immig.

She says paraquat and rotenone are registered pesticides in Australia, despite being banned in the European Union.

"Paraquat, for instance, is a herbicide widely used in sugar cane and vegetable production, and it's used in making fire breaks and other general weed management," says Immig. "It's used in a lot of different contexts and by many people."

The Australia Pesticides and Veterinary Medicines Authority website lists rotenone as a chemical nominated for review, because "of human health concerns". Paraquat has been under review since 1997.

Brain efficiency comes from parents
Backward bending light key to stealth
Signs of 'alien life' found in meteorites
Accurate blood test for Down's
Disaster volunteers at risk: study
Elephants smart as chimps, dolphins
Gadgets ruining people's sleep
Why skin doesn't dissolve in the bath
Astronomers find old heads in a young crowd
Paper leads to perfect beer head
Researchers locate brain's loudness map
Jamming may leave GPS in the wilderness
Pain washes guilt away
Quake could alter Tokyo risk: experts
Japan meltdown not like Chernobyl: expert
Dreamtime astronomers understood meteors
CERN restarts search for cosmic origins
Nuclear Contamination: What to Do
Bet-hedging 'key to natural selection'
Humans age same as other primates
US overdue, under-prepared for huge quake
Sperm's egg-seeking secrets revealed
Lasers to nudge space junk out harm's way
Researchers uncover gastro's sugary secret
Kepler probes inside swollen red giant
Randomness could 'improve democracy'
Moonageddon: Apocalypse not
Museum unveils Columbian mammoth
Ink-jet inspire scientists to make skin
Seaweed offers clues against malaria
Christchurch quakes may be connected
Solar storms pose risk to technology
Study finds fences thwart cane toad
Mobile phone alters brain activity
Sticky dots approved for clinical trial
Humans stink worse than other animals
Putting the bounce in carbon balls
Sulphur secrets uncovered
Cool laser makes atoms march in time
Hot flashes may be a sign of good heart
Scientists see the birth of a new planet
X-ray expectations change search methods
Eucalypt-harming fungus here to stay
Life elements came from outer space
Cricket wimps use perfume to find mates
Orphan planets could support life
Speech lights up visual cortex in blind
How the Sun loses its spots
Cancer resistance mechanism found
Fungus turns Amazonian ants into zombies
Tiny grains record solar system's infancy
Antarctic ice forming beneath glaciers
Visit Statistics