Hideo Hayashi
Laboratory of Natural Products Chemistry, Division of Applied Biological Chemistry, Graduate School of Agriculture and Life Science, Osaka Prefecture University,1-1 Gakuen-cho, Sakai, Osaka 599-8531

Published : 8 Documents
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Triterpenoid Pentacyclic Antimalarial Activity from the Leaves of Erythrina variegata

Jurnal ILMU DASAR Vol 12, No 2 (2011)
Publisher : Fakultas MIPA Universitas Jember

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Abstract

In the course of our continuing research for novel antimalarial agent from Indonesian plants, the methanol extract of the Erythrina variegata leaves showed significant antimalarial activity against Plasmodium falciparum strain K1 in vitro with IC50 6.8 μg/mL. The methanol extract was separated by using variety of chromatography techniques. The chemical structure of an antimalarial compound was determined on the basis of spectroscopic evidence and compared to previous data then this compound is identified as a pentacyclic triterpenoid oleane derivative, namely 3,22,23-trihydroxy-oleane-12-ene. The pentacyclic triterpenoid, 3,22,23-trihydroxy-oleane- 12-ene showed antimalarial activity against 3D7 and K1 strains with IC50 4.3 μg/mL and 24 μg/mL, respectively. These results strongly suggested that E. variegata is a promising sources of antimalarial agents. Keywords:Antimalarial,Erythrinavariegata,Plasmodiumfalciparum, pentacyclictriterpenoidoleane

An Isoflovonoid, Warangalone from the Stem Bark of Dadap Ayam (Erythrina variegata)

Jurnal ILMU DASAR Vol 9, No 1 (2008)
Publisher : Fakultas MIPA Universitas Jember

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Abstract

In the course of our continuing search for novel paralytic compound from Indonesian plants, the methanol extract of the stem bark of Erythrina variegata (Leguminosae) showed significant paralytic activity against the third instar larvae of silkworm (Bombyx mori). The purposes of this research were isolation and structural elucidation of paralytic compound from the stem bark of E. variegata. Using the paralytic activity following the separation, the methanol extract was separated by combination of column chromatography to yield prenylisoflavone, warangalone. The chemical structure of warangalone was identified based on spectroscopic evidence and comparison with the previous reported. The paralytic activity of warangalone showed weak activity against the third instar larvae of silkworm (B. mori).Keywords: Erythrina variegata, Leguminosae, isoflavonoid, warangalone, paralytic activity

In Vitro Anti-Cancer Alkaloid and Flavonoid Extracted from the Erythrina variegata (Leguminoseae) Plant

Indonesian Journal of Cancer Chemoprevention Vol 2, No 3 (2011)
Publisher : Indonesian Research Gateway

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Abstract

Erythrina plants, locally known as “dadap ayam”, are higher plant species and have been used as a folk medicine for treatment of cancer. To prove the effectiveness of the leaves and stem bark of E. variegata as an anti-cancer agent, the assay in this research was focused on in vitro  test  towards  breast  cancer  cell  T47D.  In  the course  of  our  continuing  search  for novel anti-cancer agent from Erythrina plants, the methanol extract of the leaves and stem bark of  E. variegata  showed  significant  anti-cancer  activity  against  breast  cancer  cell  T47D  in  vitro  using the Sulphorhodamine B (SRB) assay. By using the anti-cancer activity to follow the separations, the methanol extract was separated by combination of column chromatography. The chemical structure  of  an  anti-cancer  compounds  were  determined  on  the  basis  of  spectroscopic evidence  and  comparison  with  the  previously  reported  and  identified  as  an  erythrina  alkaloid (1)  and  isoflavonoid  (2).  Compounds  (1-2)  showed  anti-cancer  activity  against  breast  cancer cell  T47D  used  with  IC50  of    1.0  and  3.3  µg/mL,  respectively.  This  results  strongly  suggested that E. variegata is promising sources for anti-cancer agents.Keywords: Anti-cancer, Erythrina variegata, Leguminoseae

SENYAWA BIOAKTIF DARI ERYTHRINA VARIEGATA (LEGUMINOSAE)

Berkala Ilmiah MIPA Vol 15, No 3 (2005)
Publisher : FMIPA UGM

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Abstract

Dalam penelitian yang berkelanjutan ini bertujuan untuk menemukan senyawa bioaktif alami dari tanaman Indonesia, diperoleh hasil bahwa ekstrak metanol dari biji Erythrina variegata (Leguminosae) menunjukkan aktivitas paralitik dan daun E. variegata menunjukkan aktivitas antimalaria. Ekstrak metanol dipisahkan komponen-komponennya dengan kombinasi kolom kromatografi diperoleh dua senyawa aktif (1 dan 2). Struktur kimia senyawa aktif (1 dan 2) ditetapkan berdasarkan data-data spektroskopi dan perbandingan data dari senyawa yang berhubungan dari penelitian sebelumnya, dan diidentifikasikan sebagai alkaloid eritrina (1) dan turunan triterpenoid pentasiklik (2). Senyawa (1) memperlihatkan aktivitas paralitik terhadap instar ketiga ulat sutera (Bombyx mori) dengan ED50 15 μg/g diet. Senyawa (2) memperlihatkan aktivitas antimalaria dengan IC50 0,243 μg/mL terhadap pertumbuhan P. falciparum secara in vitro. Kata kunci: Erythrina variegata, Leguminosae, aktivitas paralitik, antimalaria

An Isoflovonoid, Warangalone from the Stem Bark of Dadap Ayam (Erythrina variegata)

Jurnal ILMU DASAR Vol 9 No 1 (2008)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Original Source | Check in Google Scholar | Full PDF (121.012 KB)

Abstract

In the course of our continuing search for novel paralytic compound from Indonesian plants, the methanol extract of the stem bark of Erythrina variegata (Leguminosae) showed significant paralytic activity against the third instar larvae of silkworm (Bombyx mori). The purposes of this research were isolation and structural elucidation of paralytic compound from the stem bark of E. variegata. Using the paralytic activity following the separation, the methanol extract was separated by combination of column chromatography to yield prenylisoflavone, warangalone. The chemical structure of warangalone was identified based on spectroscopic evidence and comparison with the previous reported. The paralytic activity of warangalone showed weak activity against the third instar larvae of silkworm (B. mori).

Triterpenoid Pentacyclic Antimalarial Activity from the Leaves of Erythrina variegata

Jurnal ILMU DASAR Vol 12 No 2 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Original Source | Check in Google Scholar | Full PDF (105.786 KB)

Abstract

In the course of our continuing research for novel antimalarial agent from Indonesian plants, the methanol extract of the Erythrina variegata leaves showed significant antimalarial activity against Plasmodium falciparum strain K1 in vitro with IC50 6.8 μg/mL. The methanol extract was separated by using variety of chromatography techniques. The chemical structure of an antimalarial compound was determined on the basis of spectroscopic evidence and compared to previous data then this compound is identified as a pentacyclic triterpenoid oleane derivative, namely 3,22,23-trihydroxy-oleane-12-ene. The pentacyclic triterpenoid, 3,22,23-trihydroxy-oleane- 12-ene showed antimalarial activity against 3D7 and K1 strains with IC50 4.3 μg/mL and 24 μg/mL, respectively. These results strongly suggested that E. variegata is a promising sources of antimalarial agents.

ANTI-MALARIAL COMPOUND FROM THE STEM BARK OF Erythrina variegata

Indonesian Journal of Chemistry Vol 9, No 2 (2009)
Publisher : Universitas Gadjah Mada

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Abstract

During the course of our continuing search for novel anti-malarial compounds from Indonesian plants, the methanol extract of the bark of E. variegata showed significant anti-malarial activity toward Plasmodium falciparum in vitro using the lactate dehydrogenase (LDH) assay. The methanol extract of the bark of E. variegata  was separated by using bioassay-guide fractionation. The ethyl acetate fraction showed the most activity, exhibiting equipotency against both strains of parasite with IC50 of 23.8 µg/mL against 3D7 and 9.3 µg/mL against K1. Furthermore, by using the anti-malarial activity to follow separation, the ethyl acetate fraction was separated by combination of column chromatography to yield an active compound. The chemical structure of active compound was determined on the basis of spectroscopic evidences and comparison with those previously reported and identified as an isoflavonoid, warangalone. The warangalone showed anti-malarial activity against both strains of parasite used with IC50 of 4.8 µg/mL against 3D7 and 3.7 µg/mL against K1.   Keywords: Antimalarial, Erythrina variegata, warangalone

In Vitro Anti-Cancer Alkaloid and Flavonoid Extracted from the Erythrina variegata (Leguminoseae) Plant

Indonesian Journal of Cancer Chemoprevention Vol 2, No 3 (2011)
Publisher : Indonesian Society for Cancer Chemoprevention

Show Abstract | Original Source | Check in Google Scholar | Full PDF (534.118 KB)

Abstract

Erythrina plants, locally known as “dadap ayam”, are higher plant species and have been used as a folk medicine for treatment of cancer. To prove the effectiveness of the leaves and stem bark of E. variegata as an anti-cancer agent, the assay in this research was focused on in vitro test towards breast cancer cell T47D. In the course of our continuing search for novel anti-cancer agent from Erythrina plants, the methanol extract of the leaves and stem bark of E. variegata showed significant anti-cancer activity against breast cancer cell T47D in vitro using the Sulphorhodamine B (SRB) assay. By using the anti-cancer activity to follow the separations, the methanol extract was separated by combination of column chromatography. The chemical structure of an anti-cancer compounds were determined on the basis of spectroscopic evidence and comparison with the previously reported and identified as an erythrina alkaloid (1) and isoflavonoid (2). Compounds (1-2) showed anti-cancer activity against breast cancer cell T47D used with IC50 of  1.0 and 3.3 µg/mL, respectively. This results strongly suggested that E. variegata is promising sources for anti-cancer agents. Keywords: Anti-cancer, Erythrina variegata, Leguminoseae