Abstract 1264: Small volatile organic compounds extracted from advanced pancreatic cancer patient blood samples: Development towards a diagnostic method

Author(s):  
Stephen P. Rogers ◽  
Frederic Zenhausern ◽  
Manpreet Chadha ◽  
Gayle Jameson ◽  
Glen Weiss ◽  
...  
Author(s):  
James Baker ◽  
Prashant Aggarwal ◽  
Elinor Chapman ◽  
Eithne Costello-Goldring ◽  
Bill Greenhalf ◽  
...  

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Ghazala Yaqub ◽  
Almas Hamid ◽  
Nikhat Khan ◽  
Sunaina Ishfaq ◽  
Asha Banzir ◽  
...  

The present study has been undertaken to analyze the total accumulated burden of volatile organic compounds (VOCs) in blood of occupationally exposed workers. The headspace technique combined with gas chromatography with flame ionization detector was used for the quantitative analysis of the different volatile organic compounds (isopropyl alcohol, phenol, benzene, dichloromethane, ethanol, ethyl acetate, and toluene) in 80 blood samples from the workers belonging to different occupations i.e., shoe polish workers, thinner handlers, paint workers, furniture polish workers, petrol station attendants, textile dyeing workers, printing press workers, and dry port workers as biomonitoring is one of the most promising methods for analyzing the individual burden of VOCs. Another purpose of this study was to investigate the correlation between detected concentrations of VOCs and associated health issues reported by the workers of these professions. Results of the study revealed the presence of different VOCs in blood samples of approximately 70 workers out of 80, and statistical analysis proved a strong relationship between the reported work experience, working hours, and diseases and the detected concentrations of respective volatile organic compounds.


Medicine ◽  
2017 ◽  
Vol 96 (47) ◽  
pp. e8725 ◽  
Author(s):  
Lijun Liang ◽  
Lei Wang ◽  
Panrong Zhu ◽  
Youyou Xia ◽  
Yun Qiao ◽  
...  

2019 ◽  
Author(s):  
Haoxuan Chen ◽  
Xinyue Li ◽  
Maosheng Yao

AbstractBreathing air is a fundamental human need, yet its safety, when challenged by various harmful or lethal substances, is often not properly guarded. For example, air toxicity is currently monitored only for single or limited number of known toxicants, thus failing to fully warn against possible hazardous air. Here, we discovered that within minutes living rats emitted distinctive profiles of volatile organic compounds (VOCs) via breath when exposed to various airborne toxicants such as endotoxin, O3, ricin, and CO2. Compared to background indoor air, when exposed to ricin or endotoxin aerosols breath-borne VOC levels, especially that of carbon disulfide, were shown to decrease; while their elevated levels were observed for O3 and CO2 exposures. A clear contrast in breath-borne VOCs profiles of rats between different toxicant exposures was observed with a statistical significance. Differences in MicroRNA regulations such as miR-33, miR-146a and miR-155 from rats’ blood samples revealed different mechanisms used by the rats in combating different air toxicant challenges. Similar to dogs, rats were found here to be able to sniff against toxic air by releasing a specific breath-borne VOC profile. The discovered science opens a new arena for online monitoring air toxicity and health effects of pollutants.TOC


2018 ◽  
Vol 105 (11) ◽  
pp. 1493-1500 ◽  
Author(s):  
S. R. Markar ◽  
B. Brodie ◽  
S.-T. Chin ◽  
A. Romano ◽  
D. Spalding ◽  
...  

Endoscopy ◽  
2020 ◽  
Author(s):  
Udayakumar Navaneethan ◽  
Chad Spencer ◽  
Xiang Zhu ◽  
John J. Vargo ◽  
David Grove ◽  
...  

Abstract Background Early and accurate diagnosis of pancreatic cancer is important. Our aim was to identify potential volatile organic compounds (VOCs) in the bile that can help distinguish pancreatic cancer from chronic pancreatitis. Methods In this prospective observational study, bile was aspirated from patients undergoing endoscopic retrograde cholangiopancreatography for chronic pancreatitis and pancreatic cancer, and the gaseous headspace was analyzed using mass spectrometry. Results The study included a discovery cohort of 57 patients (46 pancreatic cancer, 11 chronic pancreatitis) and a validation cohort of 31 patients (19 and 12, respectively). Using logistic regression analysis, the model [0.158 × age + 9.747 × log (ammonia) – 3.994 × log (acetonitrile) + 5.044 × log (trimethylamine) – 30.23] successfully identified patients with pancreatic cancer with a sensitivity of 93.5 % and specificity of 100 % (likelihood ratio 40.9, area under the curve 0.98, 95 % confidence interval 0.95 – 1.00). The diagnostic accuracy of this model was confirmed in the second independent validation cohort. Conclusion The measurement of VOCs in bile helped to accurately distinguish pancreatic cancer from chronic pancreatitis.


Talanta ◽  
2021 ◽  
Vol 221 ◽  
pp. 121604
Author(s):  
Emma Daulton ◽  
Alfian N. Wicaksono ◽  
Akira Tiele ◽  
Hemant M. Kocher ◽  
Silvana Debernardi ◽  
...  

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