Objective: Breast cancer is a malignant disease of women most often found after cervical cancer in Indonesia. Increased levels of free radicals can cause DNA damage, which could lead to malignancy; this can play role in breast cancer etiopathogenesis. The present research was conducted to determine the activity of catechins as antioxidants and their potential efficacy in inhibiting breast cancer malignancy. Methods: The research was done by examining the antioxidant and free radical scavenging activity including 1,1-diphenyl-2-picryl-hydrazyl (DPPH), the value of superoxide dismutase (SOD), and assays in breast cancer cell lines (T47D, MCF7). The cytotoxic potency was determined by the MTS (3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4sulfophenyl)-2H-tetrazolium) assay. Results: The highest DPPH scavenging activity is presented by (-)-epigallocatechin (EGC) and the lowest by gallo catechins (GC). The highest SOD value were reached with EGC at 500 µg/ml, followed by (-)-epicatechin gallate (ECG) at 125 µg/ml, and GC at 31.25 µg/ml concentrations. The highest cytotoxic activity in T47D cell line for 24 and 48 h incubation was exhibited by (-)gallocatechin gallate (GCG). The greatest cytotoxic activity in MCF7 cell line for 24 h was presented by (-)-epigallocatechin gallate (EGCG), and for 48 h incubation by (+)-catechin (C). Conclusion: Catechins have high antioxidant activities proven by both DPPH scavenging and SOD activities. They possess higher anticancer action on T47D than on MCF7 cell line.

accelerates wound healing. We examined the effect of Ethanol Extract of Neem Leaf (EENL) inaccelerating wound healing and compared its potential with povidone iodine. This was ananalytic experimental study, using Complete Randomized Design (CRD) with a comparativemethod. We used 30 male Swiss Webster mice that were divided into five groups (n=6). Eachgroup was given the Ethanol Extract of Neem Leaf (EENL) with a concentration of 25%, 12.5%and 25%, aquades (negative control) and povidone iodine 10% (comparison). The averagewound healing time of EENL 25%, EENL 12.5% , EENL 6.25% , povidone iodine and aquadeswere 11.2; 12.2;13.2;13.2;and 1.3 days respectively. The data was analized with one wayANOVA and showed a highly significant difference of p=0.000. Tukey HSD test showed thatEENL 25% and 12.5% had better potential than povidone iodine 10% and EENL 6.25% had thesame potential with povidone iodine 10%. This study concludes that ethanol extract of neem leafhas an effect in accelerating the duration of wound healing, with EENL 25% as the bestconcentration in accelerating the duration of wound healing.Keywords: neem leaf, Azadirachta indica A. Juss, wound healing, Swiss Webster mice