Ekstrak kulit apel hijau (Pyrus malus L.) mengandung senyawa Quercetin yang mampu menurunkan ekspresi Bcl-2. Penelitian ini bertujuan untuk mengetahui aktivitas sitotoksik dan induksi apoptosis ekstrak etanol kulit apel hijau (EEKAH) pada model sel kanker payudara MCF-7. Serbuk kulit apel hijau diekstraksi menggunakan pelarut etanol 70% dengan metode ultrasonik. Uji sitotoksik terhadap sel kanker payudara MCF-7 dengan metode MTT Assay pada konsentrasi EEKAH yaitu 31,25; 62,5; 125; 250; 500 dan 1000 µg/mL. Hasil uji sitotoksik dihitung nilai IC50menggunakan regresi linier. Pengamatan induksi apoptosis dengan konsentrasi ½ IC50(442,5 μg/ml) dan IC50 (885 μg/ml) menggunakan flowcytometry. Analisis data dianalisis menggunakan analisis statistik One Way Anova. Hasil penelitian menunjukan bahwa EEKAH memiliki aktivitas sitotoksik dengan nilai IC50 sebesar 885 µg/ml. Persentase rata-rata fase apoptosis total EEKAH pada konsentrasi ½ IC50sebesar 30,2% (p>0,05) dan IC50 sebesar 47,9% (p<0,05) dibandingkan kontrol sel sebesar 12,7%. EEKAH mampu menginduksi apoptosis terhadap sel MCF-7. Kata kunci: MCF-7, Pyrus malus L., Sitotoksisitas, Apoptosis Green apple peel extract (Pyrus malus L.) contains Quercetin compound which decrease Bcl-2 expression. The aims of this study was to determined the cytotoxic activity and apoptosis induction of green apple peel ethanol extract (GASEE) on MCF-7 breast cancer cells. The green apple peel powder was extracted using 70% ethanol solvent by ultrasonic method. Cytotoxic test against MCF-7 breast cancer cells using the MTT Assay method at the GASEE concentration, namely 31.25; 62.5; 125; 250; 500 and 1000 µg/mL. The results of the cytotoxic test calculated the IC50 value using linear regression. Determination of apoptosis induction with a concentration of ½ IC50 (442.5 µg/mL) and IC50 (885 µg/mL) using flowcytometry. Data analysis was analyzed using statistical analysis One Way Anova. The results showed that GASEE has cytotoxic activity with an IC50 value of 885 µg/ml. Average percentage of total apoptosis phase are ½ IC50 concentration of 30.2% (p>0.05) and IC50 of 47.9% (p<0.05) than cell control of 12.6%. GASEE can apoptosis induced against MCF-7 cells.
Nutmeg oil contains α-pinene, which can be used as sunscreen. The combination of Tween 80 and PEG 400 can maintain the stability of nutmeg oil microemulsion. This research was a follow-up study that aims to determine the stability of the SPF value and qualitative chemical content of nutmeg seed oil microemulsions (NSM). NSM was made with a nutmeg seed oil concentration of 6.4% and tween 80 and PEG 400 as surfactants and cosurfactants with variations in the ratio of F1 (5: 4), F2 (6: 4), and F3 (7: 4). Nutmeg seed oil and NSM content was analyzed using GC-MS. NSM formula were tested for in vitro SPF value stability by storing NSM in a climatic chamber at 30 °C ± 2 °C with RH 65 % ± 5 % for 4 weeks. The SPF values were calculated every week. GC-MS data were analyzed descriptively and data of SPF value stability were analyzed statistically using one-way ANOVA. The GC-MS results of nutmeg seed oil showed 35 components, including significant compounds, namely αpinene, sabinene, β-phellandrene and also α-terpinolene. GC-MS results of NSM showed those significant compounds were still detected after being formulated in microemulsion. The results of the sunscreen activity test of NSM before storage were 10.31 ± 0.03 (F1); 10.47 ± 0.07 (F2); 10.45 ± 0.03 (F3) and did not show significant change after storage for 4 weeks (p > 0.05). The SPF values of NSM were categorized in maximum activity.
Nutmeg Oil (Myristica fragrans) contains myristicin which is unstable in storage. However, microemulsion increases the stability of the preparation. Meanwhile, the combination of surfactant tween 80 and PEG 400 is known to improve the stability of the microemulsion. Therefore, this research aims to examine the physical stability and antioxidants of nutmeg oil microemulsion with variations of tween 80 and PEG 400 as surfactants and cosurfactants. The nutmeg oil microemulsion was prepared with a oil concentration of 5% with variations of surfactants and cosurfactants Tween 80 and PEG 400, namely F1 (7: 6), F2 (8: 6), F3 (9: 6), F4 (10: 6). ) and F5 (12: 6). Furthermore, the physical stability test was performed using the cycling test method for 6 cycles at temperatures of 40 ± 2 ºC and 4 ± 2 ºC while the parameters observed included organoleptic and homogeneity, phase separation, droplet size, viscosity, and pH. Meanwhile, the major antioxidant parameter observed was the percentage of inhibition. The physical stability and antioxidant results were analyzed using the t-dependent test to compare the data before and after the cycling test. The results showed that all the microemulsion formulas were clear, pale yellow in color, oily and watery in texture and there was no phase separation after the cycle test was carried out. In addition, the droplet sizes of all formulas were between 33 to 125 nm, while the viscosity ranged from 68 to 73 cps and the pH is suitable for topical preparations. All physical parameters did not change significantly after the cycling test (p> 0.05), meanwhile, the antioxidant stability test showed that there was no significant difference in percent inhibition (p> 0.05) which ranged from 64 to 68%. Therefore, based on the results, the nutmeg oil microemulsion has strong antioxidant activity.
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