Urinary volatile compounds as biomarkers for lung cancer

Area of Science:

• Biochemistry
• Oncology
• Analytical Chemistry

Background:

• Lung cancer remains a significant global health challenge, necessitating improved early detection methods.
• Current diagnostic approaches often lack non-invasiveness, high sensitivity, or specificity.
• Identifying novel biomarkers is crucial for advancing early-stage lung cancer diagnosis.

Purpose of the Study:

• To investigate the potential of urinary volatile organic compounds (VOCs) as non-invasive biomarkers for lung cancer detection.
• To determine if VOC profiles can differentiate lung cancer patients from healthy controls.
• To explore VOC utility in distinguishing between lung cancer subtypes.

Main Methods:

• Urinary volatile organic compounds (VOCs) were extracted using solid-phase microextraction.
• Gas chromatography time-of-flight mass spectrometry was employed for VOC analysis.
• Receiver operating characteristic (ROC) curve analysis and principal component analysis (PCA) were utilized for data interpretation.

Main Results:

• Nine putative volatile biomarkers were identified and found to be elevated in lung cancer patients.
• The identified biomarkers demonstrated high sensitivity and specificity in discriminating between lung cancer and control groups.
• Principal component analysis suggested that 2-pentanone may help differentiate between adenocarcinoma and squamous cell carcinomas.

Conclusions:

• Urinary VOCs show promise as non-invasive biomarkers for early lung cancer diagnosis.
• The identified VOC panel offers high sensitivity and specificity for lung cancer detection.
• Specific VOCs, such as 2-pentanone, may aid in differentiating major lung cancer subtypes.