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All Journal Indonesian Journal of Cancer Chemoprevention
Asri Mega Putri
Cancer Chemoprevention Research Center, Faculty of Pharmacy, Universitas Gadjah Mada
Biochemistry, Genetics & Molecular Biology Medicine & Pharmacology

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Secang Heartwood Ethanolic Extract (Caesalpinia sappan L.) Inhibits Mesenchymal Stem Cells Senescence Asri Mega Putri; Nindya Budiana Putri; Rahmawaty Rachmady; Idlohatud Dilalah; Retno Murwanti; Edy Meiyanto
Indonesian Journal of Cancer Chemoprevention Vol 8, No 3 (2017)
Publisher : Indonesian Society for Cancer Chemoprevention

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14499/indonesianjcanchemoprev8iss3pp126-134

Abstract

Antioxidants have the ability to scavenge free radicals, leading to inhibition of cells senescence. Secang Heartwood (Caesalpinia sappan L.) contains flavonoid brazilein, known of its high antioxidant activity. However, the activity of secang as senescent cells inhibitor has not been known. The aim of this study is to explore the potential of Caesalpinia sappan ethanolic extract (CSE) as free radical scavenger, thus inhibits senescent cells. Two concentrations of SE under IC50, 2µg/mL, 5µg/mL and 10µg/mL were applied on Mesenchymal Stem Cells (MSCs) and combined with 5µM of doxorubicin (Dox) as senescence inductor; both of them were compared with MSCs-Dox group. X-gal, chromogenic substrate of senescent cells, was given on MSCs, giving blue stain on senescent cells. To explore brazilein mechanism in senescence inhibition, molecular docking using PLANTS on topoisomerase II was performed. MSCs that treated with 10µg/mL of SE qualitatively showed reduction intensity of blue stain. Number of stained cells also reduced from 76% of MSCs-Dox to 38 % of 10µg/mL SE-Dox group. Docking score shows that brazilein (-86.91) is more stable to interact with topoisomerase II than doxorubicin (-82.46) and has same binding site (Val 174). These findings demonstrate starting knowledge on CSE potential as senescent cells inhibitor through brazilein activity on topoisomerase II.Keyword: Caesalpinia sappan L., Senescence, β-galactosidase, Molecular Docking
Antigenotoxic Activity of Rumput Mutiara (Hedyotis corymbosa L.) Ethanolic Extract on Cyclophosphamide-Induced Mice Yoce Aprianto; Asri Mega Putri; Hilyatul Fadliyah; Retno Murwanti; Edy Meiyanto
Indonesian Journal of Cancer Chemoprevention Vol 8, No 3 (2017)
Publisher : Indonesian Society for Cancer Chemoprevention

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14499/indonesianjcanchemoprev8iss3pp135-145

Abstract

Exposure to relative chemicals has been shown to induce a genotoxic effect that can be observed through formation of micronucleus (MN) in polychromatic erythrocythes (PCE). Rumput Mutiara or Hedyotis corymbosa L. ethanolic extract (HcEE) is known to contain ursolic acid as major compound that possesses antigenotoxic activity on HepG2 cells. This study exerts in vivo approach aiming to evaluate the antigenotoxic effects of HcEE on cyclophosphamide (CP)-induced male Swiss mice. The ursolic acid on HcEE was determined by using thin layer chromatography with silica gel as stationary phase and chloroform-aceton (9:1) as mobile phase. The antigenotoxic activity was carried out by in vivo micronucleus test. Twenty four adult mice were equally divided into seven groups. Group I: control (untreated); group II: Na-CMC 0.5%; group III: CP 50 mg/kg BW; group IV: CP+HcEE 250 mg/kg BW; group V: CP+HcEE 500 mg/kg BW; group VI: CP+HcEE 1000 mg/kg BW; group VII: HcEE 1000 mg/kg BW. HcEE were given for seven days, while CP was administered on the last two days. On the seventh day, the peripheral blood from all mice were collected, smeared, and then stained with Giemsa. The frequencies of MNPCEs and %PCEs were evaluated. Molecular docking was performed to know the interaction between ursolic acid and CYP3A4 by using PLANTS software. There was similar hRF spot between HcEE with ursolic acid standard reference indicated that the extract almost positively contain ursolic acid. HcEE reduced MNPCEs significantly compared to CP group (p<0.05) and combination of CP with HcEE showed reduction of %PCEs (p<0.05). Based on molecular docking analysis, ursolic acid gave lower docking score than CP against CYP3A4 (PDB ID: 2V0M) and similar binding site on amino acid residues Ala 448, Ile 369, Thr 309, and Val 313. All of these data suggest that HcEE perform protective effect against CP-induced genotoxicity.Keywords: Antigenotoxic, Hedyotis corymbosa L., cyclophosphamide, micronucleus, molecular docking
Co-Authors Edy Meiyanto Hilyatul Fadliyah Idlohatud Dilalah Nindya Budiana Putri Rahmawaty Rachmady Retno Murwanti Yoce Aprianto