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Sensitive Detection of Chicken Meat in Commercial Processed Food Products Based on One-Step Colourimetric Loop-Mediated Isothermal Amplification

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Abstract

Meat adulteration has been a great concern in the food industry worldwide. Due to its lower cost, chicken is generally used as an adulterant in several meat products. The main objective of this research was to develop a novel detection platform based on colourimetric loop-mediated isothermal amplification (LAMP) for authenticating chicken content in raw and processed meat products. Conditions for the colourimetric LAMP were thus optimised. Neutral red, a pH-sensitive indicator, was introduced into the LAMP reactions to help distinguish the positive/negative outcomes. LAMP reaction containing amplified LAMP amplicons changed its colour from yellow to pink/magenta, while the reaction without amplified DNA products remained in its original yellow colour. This single-step colourimetric LAMP was also validated for its high specificity towards chicken DNA without any cross-reactivity with the DNA from other types of meat. The limits of detection (LOD) for chicken DNA and chicken in binary meat admixtures were 1 pg and 0.01% (w/w), respectively. From 33 different commercial processed food samples, the assay confirmed chicken content in 14 declared chicken-containing products and in 8 products without the declaration of chicken content, while the remaining 11 meat samples without the declaration of chicken content showed no detectable chicken DNA. Furthermore, without the requirement of DNA purification, the direct colourimetric LAMP assay is capable of accurate authentication of chicken content in raw meat matrices and commercial processed food samples, making it a valuable analytical tool to facilitate on-site food authentication, as well as in low-resource laboratory settings.

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All data generated or analysed during this study are included in this published article and its supplementary information file.

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Acknowledgements

The authors would like to thank Prof. Paul A. Millner from School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, UK, and Prof. Richard L. Deming from California State University, Fullerton, USA, for helpful discussions and English language editing.

Funding

This research was supported by the Program Management Unit for Human Resources & Institutional Development, Research and Innovation, Office of National Higher Education Science Research and Innovation Policy Council, Thailand (NXPO) (Grant Number B16F640001). This work was also partially supported by the Center of Excellence in Materials Science and Technology, the Materials Science Research Center (MSRC), Faculty of Science, Chiang Mai University, Thailand.

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Pattanapong Thangsunan, conceptualisation, writing — original draft, writing — review and editing, methodology, and formal analysis. Sasithon Temisak, writing — review and editing, and methodology. Thanapak Jaimalai, methodology. Leonardo Rios-Solis, writing — review and editing. Nuttee Suree, funding acquisition and writing — review and editing.

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Correspondence to Pattanapong Thangsunan or Nuttee Suree.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Pattanapong Thangsunan declares that he has no conflict of interest. Sasithon Temisak declares that she has no conflict of interest. Thanapak Jaimalai declares that she has no conflict of interest. Leonardo Rios-Solis declares that he has no conflict of interest. Nuttee Suree declares that he has no conflict of interest.

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Thangsunan, P., Temisak, S., Jaimalai, T. et al. Sensitive Detection of Chicken Meat in Commercial Processed Food Products Based on One-Step Colourimetric Loop-Mediated Isothermal Amplification. Food Anal. Methods 15, 1341–1355 (2022). https://doi.org/10.1007/s12161-021-02210-1

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  • DOI: https://doi.org/10.1007/s12161-021-02210-1

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