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Can fungal volatile organic compounds be used to develop aflatoxin-specific sensors?

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A part of the VOCs are constantly emitted by the strain during their growth

VOCs specifically emitted by the toxigenic strain have been identified. They are potentiel biomarkers to develop

specific sensors

VOCs emitted by toxigenic and non toxigenic strains are

different l.josselin@uliege.be https://be.linkedin.com/in/ laurie-josselin-a0388416b https://www.researchgate.net /profile/Laurie_Josselin

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VOCs emitted by toxigenic,non toxigenic and both strains

Can fungal volatile organic compounds be used to

develop aflatoxin-specific sensors?

Laurie Josselin

1

, Marthe De Boevre

2

, Caroline De Clerck

1

, Moretti Antonio

3

, Soyeurt Hélène

1

and

Marie-Laure Fauconnier

1

1 2 3

For the moment, mycotoxins are analyzed by HPLC-MS/MS a long, expensive and descructive method. The purpose of the present

work is to identify volatile organic compounds (VOCs) markers that are produce together with mycotoxins by the fungi in order

to develop specific sensor.

B

C o n ce n tr a ti o n (M )

Retention time (min) 1 0.5 10 20 0 C o n ce n tr a ti o n (M )

Retention time (min) 1 0.5 10 20 0 100 50 A b o n d a n ce (% ) m/z 0 100 50 A b o n d a nce (% ) m/z 0 100 50 A b o n d a n ce (% ) m/z 0

C

see C

A

Foodstuff (corn, wheat, rice, etc.)

can be contaminated by several

filamentous fungal species (Aspergillus, Fusarium and Penicillium) in pre or

post-harvest conditions.

1

Fungi grow in field or during storage. They produce secondary metabolites named mycotoxins.

2

Mycotoxines

3

Mycotoxin's contamination can cause severe illnesses upon chronic exposure and can even lead to death after acute exposure.

5

4

Mycotoxins are thermoresistant, even after hot or cold treatment they are still toxic.

Context

Method

Objective

Results

Outline

GHENT UNIVERSITY see C

Separation and analysis of trapped VOCs

C o m m o n (4 9 % ) N o n T ox ig e n ic (3 5 % ) Tox igen ic (16%) SENSOR FUNGI VOCs ASPERGILLUS SP. VOCs 1-octen-3-ol 3-methylbutan-1-ol octan-3-one 2-methylbutanal VOCS specific to toxigenic strain 2-methylbutanal Undecan-2-one 3-methylbutanal

Increase sensitivity of the method

Correlate VOCs emission and mycotoxin production

Consiglio Nazionale delle Ricerche

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