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BREATH

Financiado

Cerrado

Characterization of biomarkers in breath of lung and breast cancer patients

Recent studies have noted that dogs are able to identify with high confidence the presence of cancerous tissues in patients at an early stage based on sniffing a breath sample. Because exhaled breath provides non-invasively a cont... ver más

30/04/2010

CNR

171K€

Presupuesto del proyecto: 171K€

Líder del proyecto

CONSIGLIO NAZIONALE DELLE RICERCHE No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo FP7 notifico la concesión del proyecto el día 2010-04-30 No tenemos la información de la convocatoria

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1 Participantes

CNR

0.00€ | Lider

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Líder del proyecto

CONSIGLIO NAZIONALE DELLE RICERCHE No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 171K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Recent studies have noted that dogs are able to identify with high confidence the presence of cancerous tissues in patients at an early stage based on sniffing a breath sample. Because exhaled breath provides non-invasively a continuous window to the biochemical activity within a person, its analysis for medical diagnosis has produced a substantial literature. However, its diagnostic reliability is still incomparable to that of dogs. In fact, breath analysis has not been introduced into common clinical practice yet mainly due to the lack of correlation with high confidence between the presence of certain biomarkers and the illness. Recently, we have shown that widely used commercial atmospheric pressure ionization mass spectrometers (API-MS) can sense breath vapors with molecular masses approaching 450 Da with high signal/background. These findings are in striking contrast with prior breath analysis literature (GC-MS and PTR-MS), involving molecular masses below 290 Da. Our data suggests that dogs have the sensitivity needed to detect such heavy breath vapors, which must be key elements in their cancer recognition process. Urea is one important low volatility biomarker which has not been observed in previous GC-MS and PTR-MS studies, but which we can measure in breath and have been positively identified. In our approach, the subject’s breath is exposed to an electrospray of acidified water, where protonation of polar species takes place near the inlet of an API-MS. The same approach has been successfully used to detect acids (i.e. lactic and pyruvic acids), operating in negative mode. Besides its sensitivity, one main advantage of this approach is that it is on-line and requires no breath sample collection. The main goal of this project is to determine potential biomarkers in breath of breast and lung cancer patients. To do so, we will carry out a systematic survey comparing the breath of healthy subjects and cancer patients.

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