Analytical and Bioanalytical Chemistry

, Volume 411, Issue 6, pp 1211–1218 | Cite as

Pullulan reduces the non-specific amplification of loop-mediated isothermal amplification (LAMP)

  • Xueqin Gao
  • Bingqi SunEmail author
  • Yifu GuanEmail author
Research Paper


Loop-mediated isothermal amplification (LAMP) has been developed as a versatile method for nucleic acid analysis in many applications. However, non-specific LAMP leading to false-positive outcomes has been observed frequently. To solve this problem, we selected six molecules as the additives for evaluating their effects on the improvement of the LAMP specificity. Experimental results show that bovine serum albumin (BSA) and DL-dithiothreitol (DTT) have negative effects on the LAMP specificity; dimethyl sulfoxide (DMSO), tetramethylene sulfoxide (TMSO), and glycerol could inhibit the non-specific LAMP moderately. Surprisingly, pullulan shows an ability to inhibit the non-specific amplification of LAMP significantly without affecting the sample amplification of LAMP, and this inhibitory effect is concentration dependent. Thus, pullulan could be considered as the most promising additive to improve the amplification specificity in the LAMP-based detection and analysis of nucleic acids.


LAMP Specificity Pullulan Additive 


Funding information

This study received financial support from the National Natural Science Foundation of China (No. 31670821).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

216_2018_1552_MOESM1_ESM.pdf (502 kb)
ESM 1 (PDF 501 kb)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Biochemistry and Molecular BiologyChina Medical UniversityShenyangChina
  2. 2.TB Laboratory, Shenyang Chest HospitalShenyangChina

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