Navigation Links
Electronic nose sniffs out prostate cancer using urine samples
Date:5/1/2014

New York, NY, May 1, 2014 We may soon be able to make easy and early diagnoses of prostate cancer by smell. Investigators in Finland have established that a novel noninvasive technique can detect prostate cancer using an electronic nose. In a proof of principle study, the eNose successfully discriminated between prostate cancer and benign prostatic hyperplasia (BPH) by "sniffing" urine headspace (the space directly above the urine sample). Results using the eNose are comparable to testing prostate specific antigen (PSA), reports the Journal of Urology.

Prostate cancer is the second most common cancer in males and one of the leading causes of cancer death. The heterogeneity of prostate cancer makes it difficult to diagnose and predict tumor progression. Both of the current cornerstones of diagnosis, i.e. digital rectal examination (DRE) and PSA have limitations, while ultrasound guided biopsies are costly, uncomfortable for the patient, and have a risk of infection. Additionally, significant numbers of diagnosed prostate cancers are of low grade and will not cause symptoms or disease-specific mortality. Therefore, aggressive treatment can lead to decreased quality of life without extending the patient's life. Thus, there is a need for novel diagnostic tools.

In the 1980s incidental reports of dogs that detected cancer in their owners sparked a number of experimental studies that have since confirmed that trained sniffer dogs can detect cancer. However, variations in the performance of dogs during and between studies have meant that these findings are of limited application. A more promising development is the growth of sensor technology (generally referred to as artificial olfaction) that has led to the invention of numerous new types of olfactory electronic sensors.

eNoses are best suited for qualitative analysis of complex gaseous mixtures of molecules, and are routinely used in food and agricultural quality control and military applications. The eNose used in the current study is a device that consists of a cluster of nonspecific sensors. When the device is exposed to the sample, it produces a profile or a "smell print."

"eNoses have been studied in various medical applications, including early detection of cancer, especially from exhaled air," says lead investigator Niku KJ. Oksala, MD, PhD, DSc, of the Department of Surgery, School of Medicine, University of Tampere and Department of Vascular Surgery, Tampere University Hospital, Finland. "However, exhaled air is a problematic sample material since it requires good cooperation and technique from the patient and immediate analysis, while urine is simple to attain and store, and is therefore more feasible in clinical practice. Preliminary data suggested that detection of urologic malignancies from urine headspace was possible. Our own preliminary results on prostate cancer cells encouraged us to launch this prospective clinical study."

The ChemPro 100eNose (Environics Inc., Mikkeli, Finland) was tested on 50 patients who had been diagnosed with prostate cancer confirmed by biopsy, and 15 patients with BPH. Both groups were scheduled for surgery. The patients provided urine samples before surgery and those with benign disease also provided samples three months after surgery to be used as a pooled control sample population. Patients with prostate cancer underwent robotic assisted laparoscopic radical prostatectomy, while the benign disease group underwent transurethral resection of prostate.

Results with the eNose confirmed that using urine headspace, the eNose is able to discriminate prostate cancer from BPH. The eNose achieved a sensitivity of 78%, specificity of 67% and AUC of 42.0.

"The performance with the eNose matches that of PSA results in previous literature and the results are achieved rapidly and in a completely noninvasive manner," comments Dr. Oksala. "PSA is known to correlate positively with prostate volume, which is a potential source of diagnostic error when comparing prostate cancer with benign disease. According to our current analysis, prostate volume did not affect the eNose results, potentially indicating high specificity of our sensor array to cancer. We also studied whether eNose signal correlates with the size of the tumor. No such correlation was found. Further studies are now warranted to enhance current technology and to identify the molecules behind the distinct odors."


'/>"/>

Contact: Linda Gruner
jumedia@elsevier.com
212-633-3923
Elsevier Health Sciences
Source:Eurekalert

Related medicine news :

1. New twist on ancient math problem could improve medicine, microelectronics
2. New American Chemical Society video: Behind the scenes tour of an electronic nose lab
3. Through The Use Of Twitter, EverSmoke, A Popular Electronic Cigarettes Company, Is Encouraging Fans to Finish the Hashtag #iPlanToBe With What They Plan to Be
4. Study examines use of a natural language processing tool for electronic health records in assessing colonoscopy quality
5. A Safe Cigarette? Yes, Electronic Cigarettes Are Carcinogen-Free
6. Electronic Cigarettes Proven as One of the Most Effective Ways to Quit Smoking
7. Electronic data methods research seeks to build a learning health care system
8. New Electronic Cigarette Free Trial Kit Adds More Years to Smokers Life by Making it Easy to Quit Smoking
9. Unique program bringing electronic medical record data to ambulances lauded
10. New Electronic Cigarette Cartridges From V2Cigs For The Summer
11. Electronic Cigarette Hub Offering Electronic Cigarette Kit with Risk Free Trial
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/2/2016)... ... December 02, 2016 , ... The PAINWeekEnd Regional ... Resort and Spa in Honolulu, offering local frontline clinicians the opportunity to extend ... , The demand for supplemental training related to pain management has surged dramatically ...
(Date:12/2/2016)... ... December 02, 2016 , ... Rijuven Corp launches rejiva ( http://www.rejiva.com ), a ... No other wearable health technology on the market can deliver all that rejiva can. ... meaningful insights about their health than the usual heart rate and steps taken”, adds ...
(Date:12/2/2016)... ... December 02, 2016 , ... Clarify Health ... has raised $6.0 million in an initial round of funding. The round was ... and their caregivers can receive far better care through the application of the ...
(Date:12/2/2016)... ... December 02, 2016 , ... ... & Author of Type 2 Diabetes: The Owner’s Manual, http://realtimepressrelease.com/press-releases-tagged-with/daryl-wein ... Hour Power of Water, Global Climate Change and Your Health radio program syndicated ...
(Date:11/30/2016)... CA (PRWEB) , ... November 30, 2016 , ... ... announce that they now offer a comprehensive in-house dental plan for all patients. ... have developed a plan that gives patients a number of perks, including discounts ...
Breaking Medicine News(10 mins):
(Date:12/2/2016)... , December 2, 2016 ... "In Vitro Diagnostics/IVD Market by Product (Instruments, Reagents, ... Application (Diabetes, Oncology, Cardiology, Nephrology, Infectious Diseases) - ... market is valued at USD 60.22 Billion in ... a CAGR of 5.5% during the forecast period ...
(Date:12/2/2016)... 2016  The Addiction Treatment Advisory Group (ATAG), ... Care Pharmacy (AMCP), has released detailed findings on ... opioid addiction crisis, including through improved access to ... ATAG,s newly released paper, "The Role of Managed ... many issues around gaps and barriers to addiction ...
(Date:12/2/2016)... Dec. 2, 2016 Boston Scientific Corporation (NYSE: ... to acquire certain manufacturing assets and capabilities of the ... advanced biological tissue business, as well as a 15% ... million in cash. The Neovasc advanced biological tissue business ... Boston Scientific Lotus™ Valve System. * Upon completion ...
Breaking Medicine Technology: