Background: Cervical cancer is the cancer with highest prevalence and the leading cause of women death in Indonesia. Current treatments available for cervical cancer are chemotherapy, radiation, surgery, and nuclear therapy. Unfortunately, these treatments still have several limitations due to serious side effects, development of resistance, and very expensive price. Therefore, it is necessary to develop effective and low-cost therapy to treat cervical cancer. One of which is by utilizing natural sources available in Indonesia such as soursop (Annona muricata) leaves which has been used in folk medicine as a treatment for various diseases, including cancer. However, studies about its cytotoxicity against cervical cancer in Indonesia are still limited. Objective: The aim of this research is to analyze the potency of A.muricataleaves extracts originated from Indonesia as a novel alternative treatment for cervical cancer. Materials and method: A.muricata leaves obtained from Serpong, West Java, Indonesia were grounded and macerated in three different solvents with various polarity, namely ethanol (polar solvent), ethyl acetate (semipolar solvent) and hexane (non-polar solvent). Subsequently, the extracts were diluted into 8 various concentrations. Cytotoxicity of A.muricataleaves extracts against HeLa cervical cancer cells were determined by MTT assay and expressed by IC 50 value. Results: The results showed that three extracts of A.muricata have strong cytotoxicity against cervical HeLa cells. The highest cytotoxic activity was shown by etanol extract with an IC 50 of 35.51 µg/mL, followed by ethyl acetate (IC 50 : 5.91 µg/mL), and hexane (IC 50 : 8.39 µg/mL). Conclusion: A.muricata leaves extracts are potential to be developed as a novel alternative therapy for cervical cancer.

Objective: Hibiscus sabdariffa, known as Roselle, is a widely-cultivated herb in Indonesia and has been consumed as an herbal drink due to its medicinal properties. The purpose of this research is to identify the antioxidant activity and phytochemical profile of Hibiscus sabdariffa. Methods: The Hibiscus sabdariffa samples were extracted and macerated with three different organic solvents: ethyl acetate, ethanol, and n-hexane. These extracts were then analyzed using thin layer chromatography (TLC) and phytochemical tests to identify the extracts’ secondary metabolites. The extracts’ antioxidant activity was evaluated using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) method. Results: The phytochemistry tests were positive for glycosides, alkaloids, steroids, triterpenoids, tannins, and flavonoids. The TLC analysis revealed that the extracts containing two to three organic compounds. The ethanol Hibiscus sabdariffa extracts with an IC50 value 103.63 ppm showed stronger antioxidant activity than the ethyl acetate extract. Conclusion: Ethanol Hibiscus sabdariffa extracts may be a potential source of natural antioxidant.

Anticancer activity of the extracts of R. brittoniana flowers were evaluated by the MTT method. R. brittoniana flowers extracts were dissolved in Dimethyl Sulfoxide (DMSO) and then added to HeLa ABSTRACT Introduction: Cervical cancer ranks 4 th in terms of the mortality rates and incidence of all cancers in women (GLOBOCAN 2018). In last decade, there is a significance progress in cancer therapy followed by an increase in the cost of cancer treatment. Therefore, it is necessary to have therapeutic innovations that are expected to reduce the cost of cervical cancer therapy. One therapeutic innovation that is currently being intensively carried out is herbal medicine. Some researchers have found that some plant extracts have anti-cancer properties that can be an alternative treatment for cancer, such as some plants with the genus Ruellia, such as Ruellia tuberosa and Ruellia squarrosa. However, research on the anticancer activity of the species of Ruellia brittoniana, especially the flowers, is still limited. Objective: Aim of this study is to examine anti-cervical cancer activity of R. brittoniana flower. Methods: R.brittoniana flowers were obtained from Depok, West Java, Indonesia. The flowers are extracted gradually with n-hexane, ethyl acetate, and ethanol solvents. The extracts were evaluated for anticancer activity by MTT method. Result: IC 50 values for ethanol extract, ethyl acetate extract and n-hexane extract of R. brittoniana flowers are 116.55 ppm, 52.62 ppm, and 123.09 ppm, respectively, which indicating that ethanol extract has moderate anticancer activity, while ethyl acetate and n-hexane extract of R. brittonianaflowers have weak anticancer activity. Conclusion: Ethanol, ethyl acetate, and n-hexane extract of R.brittoniana flowers have a potential to become natural anti-cervical cancer.

Background: Lung cancer is the one of the leading causes of cancer death. However, current treatments for lung cancer are expensive and show negative side effects. Therefore, the study concerning natural anticancer from plants has intensified. Hibiscus sabdariffa Linn are Indonesian herb plants which have been consumed as a drink, are known to have anticancer activity against several cancer cell lines. However, its potential cytotoxic activity on A549 lung cancer cell line is still unclear. Objective: This study aimed to identify cytotoxic activity of Hibiscus sabdariffa Linn extracts on A549 lung cancer cell line. Materials and Method: Hibiscus sabdariffa Linn flowers from Tangerang, province of Banten, Indonesia, were macerated in three different solvents: ethyl acetate, ethanol, and n-hexane. Afterwards, cytotoxic activity of Hibiscus sabdariffa Linn extracts on A549 lung cancer cell line were evaluated using MTT assay. There were eight variety of concentration of the extracts, the experiment has been done triplicate for each concentration. The anticancer activity is expressed by IC 50 value. Results: Hibiscus sabdariffa Linn extracts in ethanol, ethyl acetate, and n-hexane showed IC 50 value of 374.01 μg/mL, 719.28 μg/mL, and 906.57 μg/mL respectively, in which indicated weak cytotoxic activity on A549 lung cancer cell line. Conclusion: Ethanol, ethyl acetate, and n-hexane extracts of Hibiscus sabdariffa Linn are potential to be further developed as natural anticancer agents. ABSTRACT SUMMARY Hibiscus sabdariffa Linn originated from Tangerang, Banten, Indonesia, showed cytotoxic activity on A549lung cancer cell line with IC 50 of 374.01 µg/mL, 719.28 µg/mL, and 906.57 µg/ mL.

Objective: The genus Ruellia has been widely used in traditional and Ayurvedic medicine as an antioxidant. This study seeks to examine the antioxidant activity of the species Ruellia brittoniana. Methods: In this study, Ruellia brittoniana flowers were acquired from Depok, West Java, Indonesia. The flowers were cleaned and ground to form a powder, then dissolved in hexane, ethanol and ethyl acetate solvents. These three extracts were then tested for phytochemicals and thin layer chromatography (TLC) analysis. Ethanol and ethyl acetate extracts were also analyzed for antioxidants using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) method. Results: Phytochemical results from the three extracts proved that Ruellia brittoniana contains flavonoids, alkaloids, tannins, glycosides and triterpenes. These results are comparable to the results from TLC analysis, which showed the samples contained 4–5 chemical components. Furthermore, the best antioxidant activity resulted from the ethyl acetate extract of the Ruellia brittoniana flower with an IC50 value of 68.42 ppm. Conclusion: An ethyl acetate extract from the Ruellia brittoniana flower can be used as a natural source of additional antioxidants.

Objective: Soursop (Annona muricata) is a tropical plant which has been utilized as a folk medicine to treat many diseases including cancer, inflammation and parasitic infection. In this study, we investigated its phytochemistry properties and antioxidant activity against free radicals. Methods: Annona muricata leaves were extracted in three different solvents: ethanol, ethyl acetate and n-hexane. Afterwards, a phytochemistry test and the thin layer chromatography (TLC) method were used to evaluate bioactive compounds contained in the three different extracts. Antioxidant activity from the semi-polar (ethyl acetate) and polar (ethanol) solvents were evaluated by the DPPH (1,1-diphenyl-2-picrylhydrazyl) method, and the antioxidant activity is expressed by IC50 value. The results were compared to ascorbic acid as a positive control. Results: The phytochemistry test showed that the extracts were positive for flavonoids, steroids, alkaloids, glycosides and tannins. Moreover, TLC analysis revealed that there were three chemical compounds contained in the extracts. The results from the DPPH method were that ethanolic extract was shown to have the most potent antioxidant activity with an IC50 value of 35.51 ppm. Conclusion: The ethanolic extract of Annona muricata could be developed as the next promising natural antioxidant source.

Introduction: In this century, cancer has increased in incidence and become one of the deadliest disease in the world. However, to date, lung cancer treatments are still not fully effective, quite expensive and very exhaustive for the patient. Eucheuma cottonii is an abundant marine red macroalgae in Indonesia which have a potential anti-lung cancer properties. Aim of this research is to determine phytochemical profile of Eucheuma cottonii extracts, as well as to evaluate its antioxidant and cytotoxic effects on Lung A-549 cancer cells. Methods: Eucheuma cottonii obtained from Sorong beach, West Papua Province, Indonesia, were extracted with three different solvents, that is ethanol, ethylacetate, and n-hexane. These three Eucheuma cottonii extracts were identified for its phytochemical profiles, antioxidant activity by DPPH (2,2-diphenyl-1-picrylhydrazyl) assay, and cytotoxic activity on lung A-549 cells by MTT (3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide) assay. Results: Phytochemical analysis revealed that Eucheuma cottonii contains metabolites of triterpenoid and alkaloid. Antioxidant activity evaluation showed ethanol extract of Eucheuma cottonii has IC 50 value of 559.76 μg/mL against DPPH free radical. Whereas cytotoxicity evaluation showed that ethanol extract and ethylacetate extract of Eucheuma cottonii have cytotoxic effects on Lung A-549 cancer cells, with IC 50 value of 251.73 μg/ mL and 261.41 μg/mL, respectively. Conclusion: These results suggesting that Eucheuma cottonii extract could be further developed as a natural anti-lung cancer agent.

Student-centered learning (SCL) is an approach in which the learning process depends significantly on the student. Hence, self-regulated learning (SRL) plays a crucial role in optimising SCL. SRL is defined as active participation in terms of metacognition, motivation, and behaviour during learning. The COVID-19 pandemic greatly impacted education, including medical education, which must adapt by implementing online and blended learning curricula. Thus, there is increasing urgency for both SCL and SRL. This cross-sectional study was performed with medical students at the Faculty of Medicine, Universitas Indonesia, using the Online Self-regulated Learning Questionnaire (OSLQ) to determine the validity and reliability of the OSLQ in the setting of Indonesian medical students and measure their online SRL profiles. We conducted cross-cultural validation, followed by exploratory factor analysis (EFA), quantitative analysis, and qualitative analysis to assess students’ SRL and the challenges of online learning environments. A total of 519 participants completed the questionnaire. The EFA confirmed the validity of the questionnaire, which comprised 23 items and five subscales, in the current population (Cronbach alpha = 0.86). Online SRL scores ranged between 65%–77%, with statistically significant differences in all subscales across six different academic years. Preclinical students had a higher level of online SRL compared to clinical students. This study supports the validity and reliability of using OSLQ in the context of Indonesian medical students. Student SRL is a dynamic process that evolves with changing learning contexts. Student support in online learning environments is essential for enhancing student SRL.