Science

Study: Diabetes Linked to Cancer in Asia

Researchers at New York University’s School of Medicine found that diabetes increased the risk of cancer death among Asians by an average of 26 percent, a statistic similar in the West. 

Data for the new study drew on an analysis of 770,000 people with Type 2 diabetes throughout East and South Asia. Diabetics were followed for an average of 13 years to see if they developed cancer and what types. During that time more than 37,300 cancer deaths were identified.

Yu Chen, an epidemiology professor at the NYU School of Medicine’s Department of Population Health who was the study’s lead author, says Asians with Type 2 diabetes are more likely to be diagnosed with rarer cancers than Westerners, including cancers of the liver, thyroid and kidney which was double the risk compared to non-diabetics in Asia. 

There was also a more than two and a half times increased risk of cancer of the endometrium and a 1.7 times higher risk of breast cancer among diabetic Asians compared to those who were not diabetic.

The number of cancers of the gallbladder and bile ducts in Asia were comparable to those in the West, according to Chen.  Those sites are closer in the body to the pancreas, where insulin is made.

Chen thinks there may be several mechanisms at work, but data suggests that insulin may in some way stimulate the growth of cancer.

“Patients with diabetes that have high levels of insulin, some cancers are very sensitive to insulin, so it may promote the tumor growing,” she said.

The findings were published in the journal Diabetologia.

Chen said the study was undertaken because there’s been little research on an association between diabetes and cancer in Asia.

She said the research suggests Type 2 diabetes should be added to the list of cancer risk factors, along with diet and cigarette smoking.

“Cancer prevention needs to take into account for diabetes the lifestyles related to diabetes – [which] may reduce the risk of diabetes and also cancer,” she said.

Chen suggested that diabetics should receive more cancer screenings, in addition to medical interventions to reduce the risk of diabetes overall.

Brazil Launches Database to Fight Illegal Amazon Logging

Brazil’s federal environmental agency, Ibama, launched on Tuesday a centralized database to track timber from source to sale, a vital step in the fight against illegal logging in the Amazon.

The system, known as Sinaflor, allows individual trees to be electronically tagged and monitored as they are cut down and pass through the supply chain, with regulators able to check the database via their cell phones while on patrol.

With built-in satellite mapping, timber being sold as legal can be checked against the exact area of licensed commercial production it is claimed to originate from.

The system marks a step change from the current system, which environmentalists criticize as being open to fraud and human error as databases are isolated, poorly managed and cannot be easily accessed to verify documentation attached to timber.

“The new system offers a much more comprehensive process of control,” Suely Araújo, president of Ibama, said in an interview in her office in Brasilia. “What’s not in Sinaflor will be illegal timber.”

The system is the result of four years of work and was envisioned under the forest code passed into law in 2012, which gave the federal government power to create and manage a national system to regulate the supply chain of timber.

Illegal logging is one of the greatest threats to the preservation of the Amazon. In the year until July 2016, Amazonian rainforest six times the size of Los Angeles was cut down.

That was the second rise in two years, ending a 10-year period in which deforestation was dramatically reduced. Brazil’s Environment Ministry, under which Ibama falls, has vowed to reverse the trend.

Sinaflor has already been piloted in the state of Roraima and is being introduced this week in Rondonia. The states are legally obliged to use the system, and Araújo expects to have it up and running across the country by the end of the year.

“When we manage to implement it in the whole country, I think it will be a step change in terms of control,” Araújo said. 

Scientists Outline High Cost of ‘Nuisance Flooding’ Along US Coasts

Minor floods caused by rising sea levels may end up costing U.S. coastal communities as much money and resources as major hurricane disasters, U.S. scientists said.

As climate change causes sea levels to rise, such “nuisance flooding” is expected to become more frequent and costly for cities like Washington, San Francisco, Boston and Miami, researchers said.

Over the last 20 years, Washington has endured more than 94 hours a year of nuisance flooding. By 2050, the capital could see as many as 700 hours of flooding a year, the scientists estimated in a study published in the American Geophysical Union journal Earth’s Future.

 

“Since these events are not extreme, they don’t get a lot of attention,” said Amir AghaKouchak, a professor of civil and environmental engineering at the University of California-Irvine and co-author of the study.

Inconvenience to public

The National Ocean Service defines nuisance flooding as “flooding that leads to public inconveniences such as road closures” but rarely causes death or injury. Such floods can overwhelm storm drains, slowly degenerate infrastructure and strain city resources.

Roads and sidewalks were not built to be under saltwater for hours on end, and cities usually have to close roads and send in trucks to clean them up, the scientists said.

“They definitely can’t withstand this,” said lead author Hamed Moftakhari, also of UC-Irvine. And the damage leads to “long, drawn-out costs,” he added.

In Boston specifically, “king tides” overwhelm walkways and roads several times a year. The East Coast city is predicted to see up to 100 hours of such nuisance flooding a year by 2030, the UC-Irvine scientists said.

Residents have already noticed the semifrequent inconvenience, according to Mia Goldwasser, Boston’s climate preparedness program manager.

“There are always people sending pictures to the city, saying, ‘Look at all the flooding happening with very little rain,’ ” she told the Thomson Reuters Foundation in a telephone interview this week. The city has already noted several waterfront hot spots where “it’s going to be worse [in the future] if there’s already flooding.”

More awareness

The flooding has raised awareness among the general public to the everyday realities of climate change, Goldwasser added: “It’s an inconvenience to people when they’re walking and driving and biking, moving around their neighborhood.”

The scientists are using the data as a “call to action” for coastal cities to examine the issue and decide on the best ways to respond to rising sea levels.

“We believe that if you have information on the type of hazard, the potential cost, then you can plan,” said AghaKouchak.

Boston has begun to come up with ideas to mitigate the effects of rising seas on infrastructure, which include floodproofing properties and potentially building a massive seawall.

Some roads and buildings may become corroded by nuisance floods, while others could end up completely under water, Goldwasser said.

“There’s still a lot that we don’t know, that we’re trying to figure out,” she said. “What are the most effective solutions? … How do we actually implement them?”

As for the total cost of the floods over the next few decades, Goldwasser said that’s still to be determined, though it’s expected to be “pretty significant.”