That's the size of the problem

November 24, 2000

The size of PM10 particles may be the key to their impact on human health.

William MacNee, professor of respiratory and environmental medicine, and colleagues at Edinburgh University are learning how exposure to inert carbon pieces less than 10 microns in diameter can worsen respiratory diseases and increase cardiopulmonary mortality among susceptible individuals.

A series of experiments, the latest published in the journal Toxicology and Applied Pharmacology , are pointing to a complex chain reaction. It seems that the particles cause an oxidative chemical reaction in the lung lining involving the particles' large surface area to mass ratio and metals such as iron. Transcription factors sensitive to oxidative stress respond by switching on inflammation genes in lung cells, which may lead to the observed health problems.

You've reached your article limit.

Register to continue

Registration is free and only takes a moment. Once registered you can read a total of 3 articles each month, plus:

  • Sign up for the editor's highlights
  • Receive World University Rankings news first
  • Get job alerts, shortlist jobs and save job searches
  • Participate in reader discussions and post comments
Register

Have your say

Log in or register to post comments