Featured Research

from universities, journals, and other organizations

Antibody Tests On Fingerprints To Detect Drugs And Diseases

Date:
May 17, 2007
Source:
John Wiley & Sons, Inc.
Summary:
Scientists can now use fingerprints to reveal drug and doping transgressions and to diagnose diseases. They have also been able to use specific antibodies to differentiate between the fingerprints of smokers and nonsmokers.

To this day, fingerprints are just the thing when a perpetrator needs to be arrested or a person needs to be identified. British scientists working with David A. Russell also want to make it possible to use fingerprints to reveal drug and doping transgressions and to diagnose diseases. As the team from the University of East Anglia in Norwich and King’s College in London report in the journal Angewandte Chemie, they have now been able to use specific antibodies to differentiate between the fingerprints of smokers and nonsmokers.

Related Articles


A fingerprint is of no use to an investigator unless it can be matched to one in a database or can be directly compared with that of a suspect. Russell and his team expect that we will soon be able to gain information about the lifestyle of the person who made the fingerprints, which could shrink the pool of suspects. In this way, it should be possible to use fingerprints to detect drugs, medications, or food that have been consumed, and also to diagnose some diseases.

Researchers want to coax all of these secrets out of the tiny traces of perspiration that a fingerprint leaves on a surface. The research team demonstrated the ease with which this should be possible by differentiating between fingerprints made by smokers and nonsmokers. To avoid false results from chance contact with tobacco products, they designed their system to detect cotinine, a metabolite formed by the body after consumption of nicotine.

The researchers wet the fingerprints with a solution containing gold nanoparticles to which cotinine-specific antibodies were attached. These bind to the cotinine. Subsequently, a second antibody, which was tagged with a fluorescent dye and binds specifically to cotinine antibodies, was applied to the fingerprint. Because there are many cotinine antibodies attached to each nanosphere, there is a significant amplification effect.

Indeed, the ridge patterns of smokers’ fingerprints fluoresce, while those of nonsmokers do not. The fingerprints are very highly resolved and can be lifted for comparison with known prints, just as in conventional procedures. When magnified, even the tiny sweat pores along the ridges of the fingertip become visible, which can also be used to make an unambiguous assignment.

In addition to forensic applications, this method would be ideal for detecting doping. Sample manipulations by the test subjects would hardly be possible since each sample is uniquely assignable to a specific athlete by virtue of the ridge pattern. Medical diagnostics could also benefit in the form of simple and quick mass screening with no danger of sample mix-ups. Another application could be drug screening without taking blood samples—from suspicious drivers, for example.


Story Source:

The above story is based on materials provided by John Wiley & Sons, Inc.. Note: Materials may be edited for content and length.


Cite This Page:

John Wiley & Sons, Inc.. "Antibody Tests On Fingerprints To Detect Drugs And Diseases." ScienceDaily. ScienceDaily, 17 May 2007. <www.sciencedaily.com/releases/2007/05/070516123538.htm>.
John Wiley & Sons, Inc.. (2007, May 17). Antibody Tests On Fingerprints To Detect Drugs And Diseases. ScienceDaily. Retrieved January 31, 2015 from www.sciencedaily.com/releases/2007/05/070516123538.htm
John Wiley & Sons, Inc.. "Antibody Tests On Fingerprints To Detect Drugs And Diseases." ScienceDaily. www.sciencedaily.com/releases/2007/05/070516123538.htm (accessed January 31, 2015).

Share This


More From ScienceDaily



More Matter & Energy News

Saturday, January 31, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Nanoscale Sensor Could Help Wine Producers and Clinical Scientists

Nanoscale Sensor Could Help Wine Producers and Clinical Scientists

Reuters - Innovations Video Online (Jan. 30, 2015) — A nanosensor that mimics the oral effects and sensations of drinking wine has been developed by Danish and Portuguese researchers. Jim Drury saw it in operation. Video provided by Reuters
Powered by NewsLook.com
Tesla 'Insane Mode' Gives Unsuspecting Passengers the Ride of Their Life

Tesla 'Insane Mode' Gives Unsuspecting Passengers the Ride of Their Life

RightThisMinute (Jan. 29, 2015) — If your car has an "Insane Mode" then you know it&apos;s fast. Well, these unsuspecting passengers were in for one insane ride when they hit the button. Tesla cars are awesome. Video provided by RightThisMinute
Powered by NewsLook.com
Now Bill Gates Is 'Concerned' About Artificial Intelligence

Now Bill Gates Is 'Concerned' About Artificial Intelligence

Newsy (Jan. 29, 2015) — Bill Gates joins the list of tech moguls scared of super-intelligent machines. He says more people should be concerned, but why? Video provided by Newsy
Powered by NewsLook.com
Senate Passes Bill for Keystone XL Pipeline

Senate Passes Bill for Keystone XL Pipeline

AP (Jan. 29, 2015) — The Republican-controlled Senate has passed a bipartisan bill approving construction of the Keystone XL oil pipeline. (Jan. 29) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins