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All Journal Indonesian Journal of Cancer Chemoprevention
Yurista Gilang
Cancer Chemoprevention Research Center, Faculty of Pharmacy, Universitas Gadjah Mada, Yogyakarta
Banana Peels (Musa paradisiaca L.) Extract as Phytoestrogen on Ovariectomized Mice Mammary Gland Development by Inducing c-Myc Expression

Indonesian Journal of Cancer Chemoprevention Vol 2, No 1 (2011)
Publisher : Indonesian Research Gateway

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Hormone Replacement Therapy (HRT) is therapy for estrogen deficiency and post menopausal  syndromes,  but  high  cost  and  unwell-secured  therapy.  One  of  alternative therapy  is  the  usage  of  phytoestrogens.  The  banana  peel  contains  flavones,  flavonol, flavanone and polimethoxyflavone which are potential as phytoestrogen. The purpose of this study was to examine the estrogenic effect of banana peel extract (BPE) development of mammary gland of ovariectomized rats. Estrogenic effects was examined based on in vivo and in silico experiment. For in vivo experiment, female Sprague-dawley rats aged 50 days were ovariectomized. At 70 days of age, 12 rats were treated with BPE 500 mg/kgBB and 1000mg/kgBB, 5 rats were treated with estradiol 2g/day while others served as control were treated with CMC-Na 0.5% and sacrificed 2 weeks later. The base line ovariectomized rats and base line non-ovariectomized rats were sacrificed at 70 days of age. The in silico experiment examined by molecular docking between myricetin and estrogen receptor alpha (ER-α). The result of in vivo experiment showed that 1000 mg/kgBW BPE induced c-Myc expression  and  enhance  ovariectomized  rat  mammary  gland  development  significantly. Meanwhile, molecular docking showed that there are hydrogen bond interaction between bioactive compound in BPE and Estrogen Receptor (ER)-α but less powerfull than estrogen and ER-α interaction. In summary, BPE can act as an estrogen agonist,  resulting in the enhancement of c-Myc expression. 

Hesperidin Increases Cytotoxic Effect of 5-Fluorouracil on WiDr Cells

Indonesian Journal of Cancer Chemoprevention Vol 3, No 2 (2012)
Publisher : Indonesian Research Gateway

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Therapy  of  colon  cancer  by  using  5-FU  often  causes  problems  of  resistance.  This encourages the development of co-chemotherapy agent. One of the compounds that could potentially be used as a co-chemotherapy agent  is hesperidin. This study was conducted to determine the cytotoxic effects of hesperidin, 5-FU and the combination of them, as well as apoptosis induction in colon cancer cells WiDr. Cytotoxic effect of hesperidin, 5-FU, and its combination were observed using MTT assay. Observation of apoptosis was done by double staining method using ethidium bromide-acridin orange. Until 48 hours incubation, hesperidin showed no cytotoxic effects. Cytotoxic effects of 5-FU was observed after 48 hours with the IC50 value of 422 µM. However, hesperidin improved the cytotoxic effects of 5-FU at 48 hour incubation.  Either  single  treatment  of  hesperidin  200µM  or  5-FU  1500  µM  did  not  trigger apoptosis, but combination of them led to the emergence of signs of apoptosis. Based on this study,it can be concluded thathesperidin is potential to be developed as a co-chemotherapy agent of 5-FU on colon cancer but still need further study on its molecular mechanisms.Keywords : hesperidin, 5-fluorouracil, WiDr cells, cytotoxic, apoptosis