Quantcast
Health

Young People in Polluted Cities at Greater Risk for Alzheimer's

A study has found that living in cities with high air pollution puts children and young adults at risk for Alzheimer's and suicide, The University of Montana reported Friday.


University of Montana researcher Dr. Lilian Calderón-Garcidueñas was part of a team that looked at the autopsies of 203 residents of Mexico City, which has daily ozone and particulate matter levels above U.S. Environmental Protection Agency (EPA) standards.

The subjects they studied ranged in age from 11 months to 40 years, and the researchers found signs of Alzheimer's in 99.5 percent of them, including in less-than-a-year-old babies.

"Alzheimer's disease starting in the brainstem of young children and affecting 99.5% of young urbanites is a serious health crisis," the abstract of the study, published in Environmental Research on March 23, warned.

The researchers, who also included participants from the Universidad del Valle de México, the Instituto Nacional de Pediatría, Boise State University, Lake Erie College of Osteopathic Medicine, the National Autonomous University of Mexico, Médica Sur and the Universidad Autónoma de Piedras Negras, looked for two abnormal proteins linked to the development of Alzheimer's: hyperphosphorylated tau and beta amyloid. They found increased levels of both in the study's subjects.

"Alzheimer's disease hallmarks start in childhood in polluted environments, and we must implement effective preventative measures early," Calderón-Garcidueñas said in the University of Montana press release. "It is useless to take reactive actions decades later."

Researchers theorized that particulate matter increased Alzheimer's risk as it enters the brain through the gastrointestinal tract, nose and lungs. The circulatory system carries particulate matter throughout the body and damages barriers.

The study is not the first to suggest that air pollution is a risk for the brain, especially in children. A study published in March found brain abnormalities in school-aged children in the Netherlands whose mothers were exposed to particulate matter when they were pregnant, U.S. News and World Report reported. The abnormalities were linked to behavioral problems and impulse control and, crucially, occurred even when the pollution the mothers were exposed to was beneath levels determined safe by EU law.

"To me, air pollution is kind of the next lead, in a way," University of Rochester environmental medicine professor Deborah Cory-Slechta told Popular Science in early April.

Cory-Slechta was alerted to the brain problems caused by air pollution when colleagues using mice to study the impact of air pollution on lung development invited her to look at the mice's brains. She found damage in almost every part of the brains two months after pollution exposure had ended.

According to the Popular Science article, living in highly air polluted areas has been linked to poor memory, lower intelligence-test performance and behavioral problems.

As the Harvard T.H. Chan School of Public Health points out, Mexico City has made important strides in reducing air pollution since the World Health Organization found it the most polluted city in the world in 1992. However, the University of Montana study warns that it, and, indeed, every polluted city, still has more work to do to protect its children's brains.
Show Comments ()

EcoWatch Daily Newsletter

Sponsored
Energy
An activist adjusts his hat while protesting the Keystone XL Pipeline during the Native Nations Rise protest on March 10, 2017 in Washington, DC. The KXL has been at the center of a contentious fight for a decade. Brendan Smialowski / AFP / Getty Images

KXL Pipeline Developer Plans to Start Construction in 2019

Construction on the long-delayed Keystone XL (KXL) pipeline is planned for 2019, developer TransCanada said Monday.

"Keystone XL has undergone years of extensive environmental review by federal and state regulators," TransCanada spokesman Matthew John told Omaha World-Herald. "All of these evaluations show that Keystone XL can be built safely and with minimal impact to the environment."

Keep reading... Show less
Popular
Artist Ricky Lee Gordon paints his mural, Wings of Paradise, on a building in Long Beach, California. David McNew / Ricky Lee Gordo / Greenpeace

Wings of Paradise: Drawing Attention to Rainforest Destruction

By Alexander Navarro

For too long the story of Indonesian forests has been painted with the darkness of burning rainforests, disappearing species and displaced communities. Greedy palm oil companies, that only seem to be driven by the bottom line whatever the cost to humanity or biodiversity, have played a major role in this.

Keep reading... Show less
Science
The ICESat-2 will point lasers at Earth's ice sheets. NASA/Goddard Space Flight Center Conceptual Image Lab

NASA's New Space Laser to Measure Earth's Changing Ice

NASA will soon activate the "most advanced laser instrument of its kind" to study Earth's changing polar ice.

The incredibly precise Advanced Topographic Laser Altimeter System (ATLAS) is the main feature of the Ice, Cloud and land Elevation Satellite-2 (ICESat-2) that successfully launched into space from the Vandenberg Air Force Base in California on Sept. 15.

Keep reading... Show less
Climate
The Atlantic wolffish is already at risk from oxygen depletion. Nilfanion, via Wikimedia Commons

Oxygen Loss in Canada Linked to Climate Change

By Tim Radford

Oceanographers have identified an act of slow suffocation, as oxygen loss grows near one of the world's richest fishing grounds, and are linking the change to human-triggered global warming.

Keep reading... Show less
Sponsored
Business
A Co-op grocery store location in Shoreditch, London. The Co-op Group / CC BY 2.0

Supermarket Becomes First in UK to Replace Single-Use Plastic Bags With Compostable Alternative

Since 2015, all large stores in England have been required by law to charge five pence for single-use plastic bags in an attempt to reduce plastic pollution.

Now, major UK supermarket chain the Co-op is taking that one step further by phasing out plastic bags entirely and replacing them with compostable alternatives, becoming the first supermarket in the UK to do so, The Guardian reported.

Keep reading... Show less
Animals
Tiger: Bernard DuPont (CC BY-SA 2.0); Wolf: John and Karen Hollingsworth /USFWS

Tigers and Wolves: The Reigning Cats and Dogs in Conservation?

By John R. Platt

Do the species most in need of conservation also receive the most scientific research?

Keep reading... Show less
Sponsored
Animals
A tiger in Dhikala, Nepal. Ranjith Kumar 2016 / CC BY-SA 4.0

Wild Tiger Population Nearly Doubles in Nepal

Thanks to dedicated conservation efforts, Nepal now has an estimated 235 wild tigers in the country, a nearly twofold increase from its baseline of 121 individuals in 2009, the World Wildlife Foundation (WWF) announced Sunday on the occasion of Nepal's National Conservation Day.

The South Asian nation is now on track to become the first country to double its tiger population as part of WWF's "TX2" goal to double the world's wild tiger population by 2022—the next year of the tiger on the Chinese zodiac.

Keep reading... Show less
Popular
North Carolina hog CAFO in Hurricane Florence floodwaters, Sept. 18. Larry Baldwin / Crystal Coast Waterkeeper / Waterkeeper Alliance

In a Warming World, Carolina CAFOs Are a Disaster for Farmers, Animals and Public Health

By Karen Perry Stillerman

In the aftermath of Hurricane Florence, I've joined millions who've watched with horror as the Carolinas have been inundated with floodwaters and worried about the various hazards those waters can contain. We've seen heavy metal-laden coal ash spills, a nuclear plant go on alert (thankfully without incident), and sewage treatment plants get swamped. But the biggest and most widely reported hazard associated with Florence appears to be the hog waste that is spilling from many of the state's thousands of CAFOs (confined animal feeding operations), and which threatens lasting havoc on public health and the local economy.

Keep reading... Show less
Sponsored

mail-copy

The best of EcoWatch, right in your inbox. Sign up for our email newsletter!