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Planta Med 2009; 75(14): 1509-1516
DOI: 10.1055/s-0029-1185807
Pharmacology
Original Paper
© Georg Thieme Verlag KG Stuttgart · New York

Cytotoxic Activity and Cell Cycle Analysis of Quinoline Alkaloids Isolated from Haplophyllum canaliculatum Boiss.

Pegah Varamini1 , Katayoun Javidnia2 , Mohammad Soltani2 , Ahmad Reza Mehdipour2 , Abbas Ghaderi1 , 3
  • 1Shiraz Institute for Cancer Research, Shiraz University of Medical Sciences, Shiraz, Iran
  • 2Medicinal and Natural Products Chemistry Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
  • 3Department of Immunology, Shiraz University of Medical Sciences, Shiraz, Iran
Further Information

Publication History

received January 12, 2009 revised April 16, 2009

accepted May 11, 2009

Publication Date:
23 June 2009 (online)

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Abstract

Bioassay-guided fractionation of Haplophyllum canaliculatum Boiss. (Rutaceae) extract resulted in isolation of five quinoline alkaloids: 7-isopentenyloxy-γ-fagarine, atanine, skimmianine, flindersine and perfamine. This is the first isolation of these compounds from this endemic species. The antitumor activity of these five isolates was evaluated against RAJI, Jurkat, KG-1a, HEP-2, MCF-7, HL-60 and HL-60/MX1 tumor cell lines. The highest cytotoxic effect was observed on acute lymphoblastic leukemia cell lines. 7-Isopentenyloxy-γ-fagarine, atanine, skimmianine and flindersine exhibited very high cytotoxicity against the RAJI cell line with IC50 values of 1.5, 14.5, 15.6 and 14.9 µg/mL, respectively and 7-isopentenyloxy-γ-fagarine, atanine and skimmianine exhibited very high cytotoxicity against the Jurkat cell line with IC50 values of 3.6, 9.3 and 11.5 µg/mL, respectively. 7-Isopentenyloxy-γ-fagarine was also highly cytotoxic against the MCF-7 cell line (IC50 = 15.5 µg/mL), while atanine, skimmianine, flindersine and perfamine showed moderate to low activity against these cells. All alkaloids had moderate to low cytotoxicity against KG-1a and HEP-2. Investigation of the toxic potential of the alkaloids on HL-60 and HL-60/MX1 showed a significantly higher effect against HL-60/MX1, a multidrug-resistant cell line, compared with the control etoposide (p < 0.05). In all cytotoxicity experiments, peripheral blood mononuclear cells (PBMC) were used as a control for normal hematopoietic cells. Flow cytometry analysis of the compounds resulted in the arrest of cell cycle progression at the sub-G1 phase of the RAJI and Jurkat cell lines in a dose-dependent manner. According to computational analyses, the similar cytotoxic trend in the cell lines could be indicative of the fact that these compounds may act through parallel mechanisms.

Key words

Haplophyllum canaliculatum - Rutaceae - quinoline alkaloids - cytotoxicity - cell cycle analysis

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Professor of Immunology Abbas Ghaderi

Shiraz Institute for Cancer Research
Shiraz University of Medical Sciences

PO Box 71345–3119

Shiraz

Iran

Phone: + 98 71 12 30 36 87

Fax: + 98 71 12 30 49 52

Email: ghaderia@sums.ac.ir