Food Analytical Methods

, Volume 10, Issue 7, pp 2325–2331 | Cite as

Loop-Mediated Isothermal Amplification Assays for the Rapid Identification of Duck-Derived Ingredients in Adulterated Meat

Article

Abstract

Meat adulteration is a growing concern in the marketplace today. To protect consumer rights and prevent unfair competition, it is essential to use an efficient assay to identify rapidly the species of meat being sold. In this context, a loop-mediated isothermal amplification (LAMP) assay coupled with a lateral flow dipstick (LFD) or hydroxynaphthol blue dye (HNB) was developed for the detection of duck genes in meat products. The LAMP-LFD and LAMP-HNB assays were performed at 65 °C for 30 min, with no cross-reactivity against four other species of meat. Sensitivity evaluation showed that the two assays can detect 3 pg of duck DNA per reaction, which is 10 times higher than that of the real-time quantitative polymerase chain reaction (qPCR). Through testing the experimental adulteration models, which were prepared by mixing duck meat with beef at different concentrations (0.01 to 10%), the detection limits of the two assays were confirmed as 0.1% duck meat. Combining the simple DNA extraction assay and the LAMP-LFD or LAMP-HNB assay, adulteration with only 1 mg duck meat can be identified within 40 min. The LAMP-LFD and LAMP-HNB assays are simple and highly sensitive, which provide valuable tools for the identification of duck gene from adulterated meat. The simple DNA extraction assay further enables our LAMP assays to be applicable in the field.

Keywords

Loop-mediated isothermal amplification (LAMP) Duck meat Adulteration Lateral flow dipstick (LFD) Hydroxynaphthol blue dye (HNB) On-site detection 

Notes

Compliance with Ethical Standards

Funding

This study was financially supported by the fund of Key Medical Subjects Construction Project of Zhejiang Province (XKQ-009-003), and the analytical test technology project of Zhejiang Province (2016C37006).

Conflict of Interest

Ya Shi declares that he has no conflict of interest. Yan Feng declares that he has no conflict of interest. Changping Xu declares that he has no conflict of interest. Zhouheng Xu declares that he has no conflict of interest. Dongqing Cheng declares that he has no conflict of interest. Yiyu Lu declares that he has no conflict of interest.

Ethical Approval

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

Informed Consent

Not applicable.

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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  1. 1.Key Laboratory of Emergency Detection for Public Health of Zhejiang ProvinceZhejiang Provincial Centre for Disease Control and PreventionHangzhouPeople’s Republic of China
  2. 2.College of Life ScienceZhejiang Chinese Medical UniversityHangzhouPeople’s Republic of China
  3. 3.College of Medical TechnologyZhejiang Chinese Medical UniversityHangzhouPeople’s Republic of China

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