Planta Med 2004; 70(6): 531-535
DOI: 10.1055/s-2004-827153
Original Paper
Biochemistry and Molecular Biology
© Georg Thieme Verlag KG Stuttgart · New York

Photo-Activated DNA Binding and Antimicrobial Activities of Furoquinoline and Pyranoquinolone Alkaloids from Rutaceae

Fujinori Hanawa1 , Nikolas Fokialakis2 , Alexios-Leandros Skaltsounis2
  • 1Department of Forest Chemistry, Forestry and Forest Products Research Institute (FFPRI), Tsukuba, Ibaraki, Japan
  • 2Department of Pharmacognosy, School of Pharmacy, University of Athens, University Campus of Zografou, Athens, Greece
Weitere Informationen

Publikationsverlauf

Received: October 8, 2003

Accepted: March 31, 2004

Publikationsdatum:
01. Juli 2004 (online)

Abstract

To find novel photo-active compounds of potential use in photochemotherapy from higher plants, photo-activated antimicrobial and DNA binding activities of the furoquinolines, skimmianine, kokusaginine, and haplopine, and a pyranoquinolone, flindersine, from two species of Rutaceae plants were investigated. TLC overlay assays against a methichillin-resistant strain of Staphylococcus aureus and Candida albicans were employed to test antimicrobial properties. All of the tested compounds showed photo-activated antimicrobial activity against S. aureus in the order of kokusaginine > haplopine, flindersine > skimmianine. Weaker activity was found for C. albicans. Photo-activated DNA binding activity of these compounds was investigated by a method using restriction enzymes and a specially designed 1.5 kb DNA fragment. Kokusaginine showed inhibition against all of the 16 restriction enzymes. Haplopine showed a similar inhibition pattern but the binding activity against Asc I and Sma I with restriction sequences consisting only of G and C was very weak. Skimmianine showed binding activity against Xba I, BciV I, Sal I, Pst I, Sph I and Hind III, but very weak or no activity was found for the other restriction enzymes. A pyranoquinolone, flindersine, showed no activity against any of the restriction enzymes. Photo-activated DNA binding activity of furoquinolines was therefore in the order of kokusaginine > haplopine > skimmianine, which was the same order as their photo-activated antimicrobial activity against S. aureus. Therefore, it was concluded that DNA is one of the cellular targets for the furoquinolines to exert their biological activities, similar to psoralens. However, because flindersine showed photo-activated antimicrobial activity against S. aureus but did not show photo-activated DNA binding activity, it is clear that there are other cellular target components for this compound to exert photo-toxic activity.

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Dr. Fujinori Hanawa

Department of Forest Chemistry

Forestry and Forest Products Research Institute (FFPRI)

1 Matsunosato

Tsukuba

Ibaraki 305-8687

Japan

Fax: +81-29-874-3720

eMail: fujinori@ffpri.affrc.go.jp