Andrographolide isolated from Andrographis paniculata induces cell cycle arrest and mitochondrial-mediated apoptosis in human leukemic HL-60 cells

Hon Yeung Cheung*, Sau Ha Cheung, Jieliang Li, Chui Shan Cheung, Wai Ping Lai, David W F FONG, Fo Man Leung

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

118 Citations (Scopus)

Abstract

The in vitro cytotoxicities of the ethanol extract of Andrographis paniculata (APE) and its main diterpenoid components were evaluated in various cancer cells. APE was found to be significantly growth inhibitory to human acute myeloid leukemic HL-60 cells with an IC50 value of 14.01 μg/mL after 24 h of treatment. Among the three main diterpenoids in A paniculata, andrographolide exhibited the highest degree of cytotoxicity followed by deoxyandrographolide while neoandrographolide was the least effective. Laser confocal microscopy and gel electrophoresis studies revealed chromosomal DNA fragmentations suggesting the occurrence of apoptosis. An increase of G 0/G1 phase cells from 51.88% to 78.69% was noted after andrographolide treatment for 36 h. The G0/G1 phase arrest and apoptosis were associated with disappearance of mitochondrial cytochrome c and increased expression of Bax but decreased expression of Bcl-2 proteins in the inhibited cells. Although the order of all these events has not been determined, it is concluded that APE and andrographolide induce cell cycle arrest and affect an intrinsic mitochondria-dependent pathway of apoptosis by regulating the expression of some pro-apoptotic markers in HL-60 cells.

Original languageEnglish
Pages (from-to)1106-1111
Number of pages6
JournalPlanta Medica
Volume71
Issue number12
DOIs
Publication statusPublished - Dec 2005

Scopus Subject Areas

  • Analytical Chemistry
  • Molecular Medicine
  • Pharmacology
  • Pharmaceutical Science
  • Drug Discovery
  • Complementary and alternative medicine
  • Organic Chemistry

User-Defined Keywords

  • Acanthaceae
  • Andrographis paniculata
  • Andrographolide
  • Apoptosis
  • Bax
  • Bcl-2 family
  • Cell cycle
  • Cytochrome c

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