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Updated: Mar 8, 2026

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Recent Advances in Effect-directed Enzyme Assays based on Thin-layer Chromatography.

Sarah Bräm1, Evelyn Wolfram1

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Summary

Thin-layer chromatography (TLC) and high-performance TLC (HPTLC) offer rapid, cost-effective analysis for natural products. TLC-based bioautographic assays reveal enzyme activities and inhibition in complex mixtures, aiding natural product drug discovery.

Keywords:
HPTLCbioautographydrug discoveryenzyme assaysenzyme inhibitorsthin-layer chromatography

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Area of Science:

  • Analytical Chemistry
  • Natural Product Chemistry
  • Biochemistry

Background:

  • Thin-layer chromatography (TLC) and high-performance TLC (HPTLC) are established analytical techniques for quality control of medicinal plants and natural products.
  • Separated compounds on TLC plates can be used to create a compound library for activity screening.
  • TLC-based bioautographic assays complement traditional screening methods by directly visualizing enzyme activity or inhibition.

Purpose of the Study:

  • To review recent advancements in TLC bioautographic enzyme assays.
  • To highlight the utility of TLC and HPTLC coupled with enzyme assays for natural product analysis.
  • To demonstrate how these methods can identify active compounds and distinguish artifacts in complex mixtures.

Main Methods:

  • Utilizing thin-layer chromatography (TLC) and high-performance TLC (HPTLC) for chromatographic separation.
  • Coupling visualized enzyme reactions directly on the TLC plate for bioautographic detection.
  • Applying enzyme and enzyme inhibition assays to analyze separated compound profiles.

Main Results:

  • TLC bioautographic assays provide phytochemical separation alongside direct information on biological activity.
  • These methods can reveal and differentiate artifacts arising from specific compound classes.
  • The review summarizes new and existing TLC bioautographic enzyme assay procedures.

Conclusions:

  • TLC and HPTLC coupled with bioautographic enzyme assays are rapid, high-throughput tools for screening natural product profiles.
  • These assays are valuable for identifying potential enzyme inhibitors and active secondary metabolites.
  • The combined approach enhances the discovery and characterization of bioactive natural products.