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Two New Bioactive α-Pyrones from Hypericum japonicum.

Linzhen Hu1, Zhenzhen Wang2, Jinwen Zhang3

  • 1Union Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China. hlz198@126.com.

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|April 23, 2016
PubMed
Summary
This summary is machine-generated.

Two new compounds, japopyrones A and B, were isolated from Hypericum japonicum. Compound 2 shows potential for inhibiting Kaposi's sarcoma-associated herpesvirus (KSHV) replication.

Keywords:
Hypericum japonicumKaposi’s sarcoma associated herpes viruspyrones

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Area of Science:

  • Phytochemistry
  • Natural Products Chemistry
  • Virology

Background:

  • Hypericum japonicum, a medicinal herb, has traditional uses for liver diseases and hemorrhages.
  • Previous research on the Hypericum genus has focused on isolating bioactive compounds.
  • Kaposi's sarcoma-associated herpesvirus (KSHV) is a significant human pathogen.

Purpose of the Study:

  • To isolate and characterize new compounds from Hypericum japonicum.
  • To evaluate the antiviral activity of isolated compounds against KSHV.

Main Methods:

  • Isolation of compounds using chromatographic techniques.
  • Structure elucidation through spectroscopic analyses (NMR, MS).
  • Absolute configuration determination via Single-crystal X-ray diffraction and electronic circular dichroism (ECD).
  • Antiviral assays to assess KSHV inhibition.

Main Results:

  • Two new α-pyrones, japopyrones A and B, were successfully isolated and identified.
  • The structures and absolute configurations of japopyrones A and B were confirmed.
  • Compound 2 demonstrated inhibitory activity against KSHV lytic replication with an IC50 of 29.46 μM.
  • Compound 2 exhibited a selective index greater than 6.79.

Conclusions:

  • Hypericum japonicum is a source of novel chemical entities.
  • Japopyrone B shows promising antiviral potential against KSHV.
  • Further investigation into japopyrone B as an antiviral agent is warranted.