Evaluation of usability and user feedback to guide telepharmacy application development in Indonesia: a mixed-methods study.

BACKGROUND: In Indonesia, the adoption of telepharmacy was propelled by the COVID-19 pandemic, prompting the need for a user-friendly application to support both the general population and pharmacists in accessing healthcare services. Therefore, this study aimed to evaluate usability and user feedback of a pioneering telepharmacy application known as Tanya Obat (translating to "Ask about Medications") in Indonesia, from the perspectives of the general population and pharmacists. METHODS: A mixed-methods sequential study was conducted with the early-stage Tanya Obat application in Bandung City. Participants, including the general population and pharmacists, were instructed to use the application for a week. Questionnaires for the general population and pharmacists were distributed from March to May and February to June 2023, respectively. The System Usability Scale questionnaire was adopted to describe usability of the developed application. Further exploration of the quantitative results required collecting open-ended feedback to assess the impressions of the participants, difficulties encountered, and desired features for enhanced user-friendliness. The collected statements were summarized and clustered using thematic analysis. Subsequently, the association between the characteristics of participants and perceived usability was determined with the Chi-square test. RESULT: A total of 176 participants, comprising 100 individuals from the general population and 76 pharmacists, engaged in this study. In terms of usability, the questionnaire showed that Tanya Obat application was on the borderline of acceptability, with mean scores of 63.4 and 64.1 from the general population and pharmacists, respectively. Additionally, open-ended feedback targeted at achieving a more compelling user experience was categorized into two themes, including concerns regarding the functionality of certain features and recommendations for improved visual aesthetics and bug fixes. No significant associations were observed between the characteristics of participants and perceived usability (p-value > 0.05). CONCLUSION: The results showed that the perceived usability of Tanya Obat developed for telepharmacy was below average. Therefore, feature optimizations should be performed to facilitate usability of this application in Indonesia.

Understanding Public Knowledge and Behavior Regarding Antibiotic Use in Indonesia.

Background: Inappropriate use of antibiotics is a prominent factor contributing to the development of antibiotic resistance, which subsequently increases healthcare costs and heightens mortality rates. Objective: This study sought to evaluate the level of knowledge and behavior pertaining to antibiotic usage within the Indonesian population. Methods: This observational study was conducted in Indonesia between December 2019 and June 2020 and employed a validated questionnaire to survey 582 respondents. A comparative analysis was performed to investigate the differences in mean scores across various respondent characteristics, specifically related to their knowledge and practice regarding antibiotic usage. Regression analysis was used to identify the factors influencing the adoption of appropriate behavior in antibiotic utilization. Results: Study participants comprised 68.2% males and 31.8% females. Participants achieved an average score of 4.86 ± 2.40 out of eight points for knowledge and behavior with an average score of 5.29 ± 1.85 out of seven points. Approximately 57.7% and 56.0% of the respondents have knowledge and behavior scores above the average score of the total population, respectively. The findings indicated notable variations in average knowledge scores associated with educational attainment and employment status regarding antibiotic use. Similarly, differences were observed in gender and employment status concerning behavior. Regression analysis highlighted that employment status, trust in physicians, and possessing sound knowledge of antibiotic usage were significant predictors of good behavior in utilizing antibiotics. Some misconceptions were identified, such as using antibiotics to kill viruses and believing antibiotics are effective for any kind of disease. Conclusion: Less than 60% of the respondents have knowledge and behavior scores above the average score of the total population; however, there are some misconceptions regarding antibiotic utilization. This underscores the importance of implementing targeted strategies, such as health education and public health campaigns, to improve the population's understanding of the correct antibiotic use.

Public Knowledge, Attitudes, and Practices Regarding the Use of Over-The-Counter (OTC) Analgesics in Indonesia: A Cross-Sectional Study.

Background: Over-the-counter analgesics like paracetamol and nonsteroidal antiinflammatory drugs (NSAIDs) are widely accessible to the general population. However, ensuring their safe and effective usage is crucial by considering individuals' knowledge, attitudes, and practices toward these medications. Objective: This study aimed to assess the general population's knowledge, attitudes, and practices regarding the use of over-the-counter analgesics. Methods: This cross-sectional study took place in Indonesia from December 2019 to June 2020. A validated questionnaire was used to survey a total of 582 respondents. A comparative analysis examined the variations in mean scores for respondents' characteristics concerning their knowledge, attitude, and practice. A regression analysis was also employed to explore the factors associated with adopting good analgesia practices. Results: The findings of the study revealed significant differences in average knowledge scores related to gender, educational attainment, and employment status for the use of both paracetamol and NSAIDs. Regarding knowledge, the respondents demonstrated a higher average score for analgesics (4.56 ± 1.84) than NSAIDs (2.881 ± 2.40), out of a maximum score of 6 points. The results indicate that the respondents obtained a low score for attitude (6.80 ± 3.74) out of 16 points and a positive score for practice (2.71 ± 0.48) out of 3 points regarding using analgesics. Moreover, the regression analysis revealed that gender, residing near primary health care facilities, and having sound knowledge of NSAID use were significant predictors of good analgesic practice (p < 0.05). Conclusion: The respondents demonstrated a greater understanding of analgesics compared with NSAIDs. However, despite this higher knowledge level, they had relatively low attitude scores but positive practice scores, indicating a discrepancy between attitudes and actual behavior in using analgesics.

Public knowledge, attitudes, and practices during the first wave of COVID-19 in Indonesia.

Background: The COVID-19 pandemic became a global emergency, and it is vital to understand the knowledge, attitudes, and practices of populations regarding this disease to prevent its spread. Objective: The study aimed to investigate the knowledge, attitudes, and practices of the Indonesian public toward COVID-19. Methods: An observational study was conducted in Indonesia between November 2020 and January 2021. The study employed a validated questionnaire with 391 respondents to the survey. A comparative analysis was performed to assess the mean differences in respondents' characteristics in terms of their knowledge, attitude, and practice scores. Furthermore, regression analysis was used to investigate those factors associated with the good practice of health protocols during the COVID-19 pandemic. Results: The findings showed significant differences in the average knowledge scores across gender, geographical location, and educational attainment. Furthermore, significant differences in practices were identified in terms of gender and educational attainment. The findings of the study indicate that the participants demonstrated a significant awareness of COVID-19, as evidenced by their high mean knowledge score of 17.83 ± 1.74 out of a possible total score of 22 points. The results indicate that the respondents exhibited a positive attitude toward COVID-19 prevention measures, as evidenced by an attitude score of 26.95 ± 3.14 out of a possible total score of 30 points. Additionally, the mean score for good practice in health protocols aimed at reducing COVID-19 infection was found to be high (4.23 ± 0.96) at 5 points. This suggests that the study participants had already adopted effective measures to comply with the recommended health guidelines. The results of the regression analysis indicated that gender, level of education, and knowledge were statistically significant predictors for adherence to health protocols during the COVID-19 pandemic (p < 0.05). Conclusion: The aforementioned results offer significant perspectives into the populace's comprehension, disposition, and conduct regarding COVID-19 in Indonesia. These insights could potentially contribute to the formulation of efficacious measures aimed at curtailing transmission of the virus.

Effectiveness and Process Evaluation of Using Digital Health Technologies in Pharmaceutical Care in Low- and Middle-Income Countries: A Systematic Review of Quantitative and Qualitative Studies.

Introduction: Digital health technology (DHT) has the potential to enhance remote health care delivery. However, little is known about the effectiveness of DHTs and factors that contribute to the limited uptake of DHTs in low- and middle-income countries (LMICs). Therefore, the objective of this study was to systematically review the effectiveness and evaluation process concerning the use of DHTs in pharmaceutical care in LMICs. Methods: A literature search on PubMed and Embase was conducted to identify experimental, descriptive, qualitative, and mixed-method studies that focused on the use of DHTs in pharmaceutical care as the main intervention, reported on the effects and/or the process of the DHT intervention, were performed by pharmacists, were conducted in LMICs, and had been published in English. Two reviewers independently conducted the study selection process. A qualitative narrative review of the effectiveness of using DHTs was conducted evaluating the population, intervention, comparators, and outcomes. We summarized the content and identified themes of the evaluation process under two categories-challenges and opportunities. Results: The search produced 589 studies, of which 16 met the eligibility criteria. The most common type of DHT was mobile health application (mHealth app; n = 8), followed by mobile phone call (n = 6) and mobile video call (n = 2). Eight studies assessed the effectiveness of using DHTs in pharmaceutical care. mHealth app, mobile phone call, mobile video call, text messages, home telemonitoring, and internet-based drug information centers improved some health-related outcomes. Two of these eight studies, however, did not find significant effects of a phone call or an mHealth app on certain health-related outcomes. Of the seven quantitative studies conducting a process evaluation, all showed that patients were satisfied with the use of DHTs in pharmaceutical care provided by pharmacists. Of the two mixed-methods and one qualitative study assessing the process evaluation concerning DHT usage, three distinct themes of challenges (patient-, DHT-, and health care system-related challenges) and opportunities (patient-, DHT-, and pharmacist-related opportunities) were identified. Conclusions: DHT is a promising approach in pharmaceutical care toward improving health-related outcomes in LMICs, despite the variable intervention effects. The challenges and opportunities identified are important considerations when developing and implementing DHTs in pharmaceutical care in LMICs.

Effectiveness and Safety Profile of Alternative Tobacco and Nicotine Products for Smoking Reduction and Cessation: A Systematic Review.

BACKGROUND: Alternative tobacco and nicotine products such as electronic cigarettes (EC), smokeless tobacco, and nicotine replacement therapy (NRT) are currently being assessed as options in tobacco harm reduction due to their potential role in smoking reduction and smoking cessation. OBJECTIVE: To provide the current evidence on the effectiveness and safety of various alternative tobacco and nicotine products for smoking reduction and cessation. METHODS: A systematic review using databases from MEDLINE (PubMed), EMBASE, and The Cochrane Library was conducted up to December 2020 to identify eligible experimental and observational studies assessing the use of alternative tobacco and nicotine products on smoking reduction and smoking cessation and the safety of these products. The Cochrane Risk of Bias 2 (RoB 2) and ROBINS-I tools were used to assess the risk of bias of the included studies. Results were described through a narrative synthesis of the evidence. RESULTS: From 1955 retrieved references, 44 studies (31 randomized controlled trials/RCTs and 13 prospective cohort studies) met the inclusion criteria and were included in the review. Twenty-nine studies were assessing EC, one study evaluated heat-not-burn (HNB) product, five studies were focused on snus, and nine studies assessed NRT in the form of nicotine patch, gum, etc. The overall results suggested that alternative tobacco and nicotine products in the form of EC, snus, and NRT can moderately reduce daily cigarette consumption and has potential to assist smoking cessation attempts, with fewer adverse events. CONCLUSION: The findings suggested that alternative tobacco and nicotine products have a potential role in assisting smoking reduction and cessation, highlighting their role in the tobacco harm reduction approach. Further studies should focus on investigating long-term outcomes, safety, and effectiveness of alternative tobacco and nicotine products to better inform smoking reduction/cessation policy. PROSPERO REGISTRATION NUMBER: CRD42020205830.

Cost-Effectiveness of Contraceptive Use in Indonesia after the Implementation of the National Health Insurance System.

Since 2014, Indonesia has initiated to implement a national health insurance system, which included both of short- (SARC) and long-acting reversible contraceptive (LARC) into the benefit package. The aim of this study was to analyze the cost-effectiveness of contraceptive use in Indonesia after the implementation of the national health insurance in 2014-2017. A decision tree model was developed to analyze the cost-effectiveness of contraceptive use in Indonesia in 2014-2017 by comparing two strategies of pregnancy prevention: contraceptive and non-contraceptive. For contraceptive strategy, we took into account SARC and LARC. In a comparison with non-contraceptive, we calculated that the incremental cost-effectiveness ratio (ICER) of SARC would be $5.18, $4.80 and $3.76 per pregnancy averted for injection, condom, and pill, respectively. For LARC, we calculated that the ICER would be $1.67 and $0.84 for implant and intrauterine device (IUD), respectively, compared with non-contraceptive. In general, the cost-effectiveness value of LARC ($1.25) was much better than SARC ($4.58). The cost of contraceptive was considered to be the most influential parameter affecting both the ICER of SARC and LARC. In conclusion, the use of LARC in Indonesia was considered to be more cost-effective than SARC since the implementation of national health insurance system. In particular, IUD yielded the greatest cost-effectiveness value, compared with other methods.

Cost-Effectiveness Analysis of Chemoradiation and Radiotherapy Treatment for Stage IIB and IIIB Cervical Cancer Patients.

PURPOSE: Cervical cancer is the second most common type of cancer and cause of death from cancer in Indonesia. In 2013, cervical cancer was the most prevalent cancer in Indonesia, with a rate of 0.8 per 1000 women. Based on the National Guidelines for Cervical Cancer Medical Services in Indonesia, the recommended therapy for stages IIB-IIIB cervical cancer is chemoradiation or radiotherapy. This study aimed to evaluate the cost-effectiveness of chemoradiation and radiotherapy for treating stage IIB-IIIB cervical cancer in a national referral hospital in Indonesia. PATIENTS AND METHODS: A cross-sectional study from a healthcare perspective using retrospective patient data was conducted. The included patients had stage IIB-IIIB registered cervical cancer, were in the hospital between January 1, 2015 and December 31, 2017, received chemoradiation or radiotherapy, were ≥18 years old, and had complete clinical data and detailed cost of therapy data. The incremental cost-effectiveness ratio (ICER) were calculated, and a sensitivity analysis was performed. RESULTS: The average treatment cost per patient was $2944 and $3231 for radiotherapy and chemoradiation, respectively. Despite the fact that the treatment effectiveness of chemoradiation (69.1%) was considered to be higher than that of radiotherapy (63.2%), chemoradiation had more potential side effects than radiotherapy. In a comparison with radiotherapy, the ICER of chemoradiation was $48.6 per complete response rate. Additionally, the cost of radiotherapy was the most influential parameter impacting the ICER. CONCLUSION: Chemoradiation was considered to be more costly than radiotherapy. Additionally, the effectiveness of chemoradiation was higher than that of radiotherapy. A cost utility analysis (CUA) is required for further investigation.

Multi-criteria decision analysis to prioritize the introduction of new vaccines in Indonesia by using the framework of the strategic multi-attribute ranking tool for vaccines (SMART vaccines).

Background: Decision-making processes regarding new vaccine prioritizations are complex. The objective of this study was to prioritize the introduction of new vaccines in Indonesia.Methods: A multi-criteria decision analysis (MCDA) was applied in this study. A preliminary data collection form was developed to collect country-specific data in relation to 30 pre-defined attributes. In particular, an open-ended questionnaire was conducted among targeted respondents from global level, national level and vaccine manufacturers, which were involved in the financial flows of new vaccine procurement in Indonesia. For setting new vaccines priorities, targeted respondents were asked to assign weight on 10 selected criteria.Results: Top 3 attributes with the highest weight from respondents were premature deaths averted per year, incident cases prevented per year, and cost-effectiveness. Applying criteria scores and weight assessment, the result showed that PCV, rotavirus, HPV, and JE would be on the 1st, 2nd, 3rd, and 4th rank for setting new vaccine priority in Indonesia. There was a significant difference score (p value <0.05) between all these vaccines.Conclusions: PCV, rotavirus and HPV vaccines should be more prioritized than JE vaccine. This ranking is in line with the WHO's priority list, which potentially illustrates the validity and usefulness of our MCDA-approach.

Perceptions, Knowledge, and Attitude Toward Mental Health Disorders and Their Treatment Among Students in an Indonesian University.

PURPOSE: To identify perception, knowledge, and attitudes toward mental health disorders and their treatment among students in a university in West Java, Indonesia. METHODS: A cross-sectional study which measures perceptions, knowledge, and attitudes of 427 university students using convenience sampling through a 53-item self-administered questionnaire was conducted in January 2020. Either a chi-square test or the Kruskal-Wallis test was employed to analyze the association between student characteristics and variables. Furthermore, Spearman rank correlation coefficient was utilized to evaluate the relationship between variables. RESULTS: A total of 51.29% students had negative perceptions, 50.23% had good knowledge, and 52.46% had positive attitudes toward mental disorders and their treatment. The differences in the experience of visiting a psychologist or psychiatrist were associated with perceptions (P<0.01), knowledge (P<0.01), and attitudes (P<0.01). A positive correlation was observed between perception and attitude (r=0.56; P<0.01) and between knowledge and attitude (r=0.24; P<0.01). The students obtained most information about mental health from social media (92.74%). CONCLUSION: Students demonstrated good knowledge and positive attitude toward mental health disorders. However, some continue to hold negative perceptions regarding approaching someone with a mental disorder, encouraging doubt and fear. Health promotion about mental health disorders and their treatment must be conducted to increase positive perceptions, good knowledge, and positive attitudes of the students. Social media tools can be considered to enhance mental health promotion and prevention of mental health problems.

Recent advances in clinical studies of selenium supplementation in radiotherapy.

BACKGROUND: Radiotherapy is one of the most important and common therapies for cancer patients. Selenium has been shown to be capable of reducing the side effects of radiotherapy because selenoproteins have anti-oxidative functions against reactive oxygen species that are induced by the radiation. They also function in DNA-repair and cytokine control. PURPOSE: We explored the benefits and risks of selenium supplementation in radiotherapy in our previous review to establish guidelines. In the current study, we expanded the search to cover recent advances in clinical studies of selenium supplementation in radiotherapy. METHODS: We conducted an initial screening in the PubMed using the MeSH terms and keywords "selenium", "radiation", "therapy", and "radiotherapy" using the same methodology applied in our previous review. We identified 121 articles published between January 2013 and December 2019. We then identified eight articles (six studies) on selenium and radiotherapy by excluding 113 articles. RESULTS: In selenium supplementation studies, selenium doses of 300-500 µg/day with duration of 10 days to 6 months were used. Selenium supplementation improved the selenium nutritional conditions of the patients and reduced the side effects of radiotherapy. Selenium supplementation did not reduce the effectiveness of radiotherapy, and no toxicities were reported. CONCLUSION: The results of our previous and current reviews showed that selenium supplementation offers specific benefits for several cancer types treated with radiotherapy. Here, we suggest a new guideline for selenium supplementation in radiotherapy. We recommend determining the selenium status of the patients before radiotherapy, and in cases of deficiency (<100 µg/L serum selenium level), selenium supplement can be beneficial.

Medication Profile and Treatment Cost Estimation Among Outpatients with Schizophrenia, Bipolar Disorder, Depression, and Anxiety Disorders in Indonesia.

PURPOSE: The present retrospective study aimed to determine the medication profile and estimate the treatment costs from medical records of new outpatients with schizophrenia, bipolar disorder, depression, and anxiety disorders from a healthcare perspective at a national referral hospital in Indonesia from 2016 to 2018. METHODS: Medical records (including medical and administrative data) of 357 new outpatients with schizophrenia, bipolar disorder, depression, or anxiety disorders were collected from the hospital information system. The records of new outpatients with schizophrenia, bipolar disorder, depression, or anxiety disorders aged >18 years and had only received drugs for treatment were included. The medication profile was descriptively assessed, and estimated costs were calculated based on direct costs from a healthcare perspective. RESULTS: Overall, 173 medical records were further analyzed. The main drugs administered to the new outpatients were atypical and typical antipsychotics for schizophrenia, atypical antipsychotics and mood stabilizers for bipolar disorder, antidepressants and atypical antipsychotics for depression, and antidepressants and benzodiazepines for anxiety disorders. The average annual treatment costs per patient were IDR 3,307,931 (USD 236) for schizophrenia, IDR 17,978,865 (USD 1,284) for bipolar disorder, IDR 1,601,850 (USD 114) for depression, and IDR 1,190,563 (USD 85) for anxiety disorders. CONCLUSION: The most commonly prescribed drugs for schizophrenia were haloperidol and risperidone; for bipolar disorders, sodium divalproex and risperidone; for depression, fluoxetine and sertraline; and for anxiety disorders, sertraline and lorazepam. Considering the high prevalence and estimated treatment costs for mental disorders, special attention is required to prevent an increase in their prevalence in Indonesia.

Impact of pharmacist counseling on health-related quality of life of patients with type 2 diabetes mellitus: a cluster randomized controlled study.

PURPOSE: The quality of life (QoL) of patients with type 2 diabetes mellitus (T2DM) is a measure of the successful outcomes of therapy. The program of management of chronic diseases "Program Pengelolaan Penyakit Kronis" (Prolanis) among patients with hypertension and T2DM is a new strategy of the Badan Penyelenggara Jaminan Sosial (BPJS), which is the Indonesian national health insurance system. Here, we analyzed the impact of pharmacist counseling interventions on health-related QoL (HRQoL) in Prolanis T2DM patients. METHODS: This cluster randomized controlled trial was designed to include two groups [control (n = 111) and intervention (n = 109) groups], and pre- and post-test procedures. The participants were Prolanis T2DM patients who attended four primary health-care centers (Puskesmas) in Makassar City, South Sulawesi, Indonesia from August 2017 to August 2018. The intervention group received systematic counseling for 6 months. The data were collected using the Bahasa Indonesia version of the European Quality of Life 5 Dimensions 5 Levels (EQ-5D-5 L) questionnaire and were analyzed using EQ-5D preference weight for each health state with the Indonesian EQ-5D-5 L value Set. Furthermore, the EQ-5D index and the EQ-5D VAS score were calculated and HbA1c levels were assessed. RESULTS: The change in the EQ-5D-5 L index score (post-pre) was 0.01 in the control group and 0.04 in the intervention group (P = 0.041). The change in the VAS score was -0.07in the control group (post-pre) and 2.66 in the intervention group (P = 0.000). CONCLUSION: Pharmacist counseling may help improve the HRQoL of Prolanis T2DM patients.

Correction to: Reduced Serum Selenium Concentration in Miscarriage Incidence of Indonesian Subjects.

The original version of this article unfortunately contained a mistake. The name of "Herlambang herlambang" is now corrected in the author group of this article.

Effects of Selenium Supplementation on the Diabetic Condition Depend on the Baseline Selenium Status in KKAy Mice.

Oxidative stress in obesity leads to insulin resistance in type 2 diabetes. Some selenoproteins possess antioxidant properties, suggesting that selenium (Se) may protect against type 2 diabetes; however, evidence from epidemiological studies is contradictory. We hypothesized that Se status before supplementation (baseline) contributes to the supplementation outcome. This study aimed to clarify the influence of baseline Se status on the effect of Se supplementation on the diabetic condition. Six-week-old KKAy mice were fed a diet without supplemental Se or with 0.1 ppm Se in the form of L-selenomethionine (SeM) for 2 weeks to create low-Se and sufficient-Se baseline statuses, respectively. For the next 4 weeks, low-Se mice were given a SeM (0.5 ppm Se)-supplemented diet, and sufficient-Se mice were given either a SeM (0.5 ppm Se)- or sodium selenite (0.5 ppm Se)-supplemented diet; control groups continued on baseline diets. Serum Se concentrations, glutathione peroxidase (GPx) activities, adiponectin levels, glucose tolerance, and insulin sensitivity were analyzed. All mice became diabetic during the 2-week baseline induction period. At the end of the supplementation period, Se-receiving groups demonstrated significantly higher Se concentrations and GPx activities than their respective controls. Sufficient-Se mice receiving SeM had lower blood glucose levels and better insulin sensitivity than control and sodium selenite-receiving mice, whereas low-Se mice receiving SeM showed no such improvements compared with their controls. Our results suggest that Se supplementation in the form of SeM may help prevent type 2 diabetes aggravation in people taking the 55 µg/day Se recommended dietary allowance.

Protective effects of sodium selenite supplementation against irradiation-induced damage in non-cancerous human esophageal cells.

The administration of radioprotective compounds is one approach to preventing radiation damage in non-cancerous tissues. Therefore, radioprotective compounds are crucial in clinical radiotherapy. Selenium is a radioprotective compound that has been used in previous clinical studies of radiotherapy. However, evidence regarding the effectiveness of selenium in radiotherapy and the mechanisms underlying the selenium-induced reduction of the side effects of radiotherapy remains insufficient. To further investigate the effectiveness of selenium in radiotherapy, the present study examined the protective effects of sodium selenite supplementation administered prior to X-ray radiation treatment in CHEK-1 non-cancerous human esophageal cells. Sodium selenite supplementation increased glutathione peroxidase 1 (GPx-1) activity in a dose- and time-dependent manner. The sodium selenite dose that induced the highest GPx-1 activity was determined to be 50 nM for 72 h prior to radiotherapy. The half-maximal inhibitory concentration of sodium selenite in CHEK-1 cells was 3.6 µM. Sodium selenite supplementation increased the survival rate of the cells in a dose-dependent manner and enhanced the degree of cell viability at 72 h post-irradiation (P<0.05). Combined treatment with 50 nM sodium selenite and 2 gray (Gy) X-ray irradiation decreased the number of sub-G1 cells from 5.9 to 4.2% (P<0.05) and increased the proportion of G1 cells from 58.8 to 62.1%, compared with 2 Gy X-ray irradiation alone; however, this difference was not statistically significant (P=1.00). Western blot analysis revealed that treatment with 2 Gy X-ray irradiation significantly increased the expression levels of cleaved poly (ADP-ribose) polymerase (PARP; P<0.05). In addition, combined treatment with 50 nM sodium selenite and 2 Gy X-ray irradiation reduced the expression levels of cleaved PARP protein, compared with 2 Gy X-ray irradiation alone; however, this reduction was not statistically significant (P=0.423). These results suggest that 50 nM sodium selenite supplementation administered for 72 h prior to irradiation may protect CHEK-1 cells from irradiation-induced damage by inhibiting irradiation-induced apoptosis. Therefore, sodium selenite is a potential radioprotective compound for non-cancerous cells in clinical radiotherapy.

Apoptosis-mediated antiproliferative activity of friedolanostane triterpenoid isolated from the leaves of Garcinia celebica against MCF-7 human breast cancer cell lines.

The leaves of Garcinia celebica strongly inhibit the proliferation of MCF-7 human breast adenocarcinoma cell lines. The present study focused on investigating the active anticancer and antiproliferative compound from the G. celebica leaves and assessing its mechanism of action. Ethanol extracts of G. celebica were fractionated based on their polarity using n-hexane, ethyl acetate and water. The antiproliferative properties were tested in vitro against MCF-7 human breast cancer cell lines using the 3-(4,5-dimethylthiazolyl-2)-2,5-diphenyltetrazolium bromide assay. The active compound was subsequently isolated using column chromatography and identified by nuclear magnetic resonance. The characterized compound was also tested for its antiproliferative properties and the mechanism by which it induces apoptosis in MCF-7 cells by western blot analysis of the activated apoptotic proteins. This resulted in the isolation of a friedolanostane triterpenoid, which was determined to be methyl-3α, 23-dihydroxy-17,14-friedolanstan-8,14,24-trien-26-oat. This compound inhibited MCF-7 cell proliferation in a time- and dose-dependent manner with IC50 values of 82 and 70 µM for the 24 and 48 h treatments, respectively. Furthermore, the western blot analysis suggested that the compound exerted its anticancer activities by promoting apoptosis through the inhibition of the oncogenic protein Akt, thereby increasing the expression of poly (ADP-ribose) polymerase (PARP) protein. These results suggest that methyl-3α,23-dihydroxy-17,14-friedolanstan-8,14,24-trien-26-oat is the anticancer compound found in G. celebica, providing a basis for its potential use in cancer disease management.

Apoptosis induced in MCF-7 human breast cancer cells by 2',4'-dihydroxy-6-methoxy-3,5-dimethylchalcone isolated from Eugenia aquea Burm f. leaves.

During a previous study that aimed to identify anticancer agents within primate-consumed plants, the present group identified that Eugenia aquea (E. aquea) possessed potential as a source of anticancer agents. The ethanol extract of E. aquea leaves exhibited strong inhibitory activity against the proliferation of the human breast adenocarcinoma MCF-7 cell line. The inhibition of proliferation was determined using an MTT assay. The present study was performed to isolate the active compound within the E. aquea leaves that generated the aforementioned activity, and resulted in the isolation of 2',4'-dihydroxy-6-methoxy-3,5-dimethylchalcone, which was identified through the analysis of spectroscopic data. This compound was examined for its inhibitory activity against the MCF-7 cell line using a MTT assay, and the ability of 2',4'-dihydroxy-6-methoxy-3,5-dimethylchalcone to induce apoptosis through the activation of the poly(adenosine diphosphate-ribose) polymerase (PARP) protein was also investigated. The results of the present study revealed that the isolated compound inhibited cell proliferation in a dose-dependent manner, possessed an IC50 of 74.5 µg/ml (250 µM) and promoted apoptosis via the activation of PARP. It was concluded that these results indicated a requirement for additional investigations into 2',4'-dihydroxy-6-methoxy-3,5-dimethylchalcone in order to provide a basis for the use of this compound in the management of cancer.

Updates on clinical studies of selenium supplementation in radiotherapy.

To establish guidelines for the selenium supplementation in radiotherapy we assessed the benefits and risks of selenium supplementation in radiotherapy. Clinical studies on the use of selenium in radiotherapy were searched in the PubMed electronic database in January 2013. Sixteen clinical studies were identified among the 167 articles selected in the initial search. Ten articles were observational studies, and the other 6 articles reported studies on the effects of selenium supplementation in patients with cancer who underwent radiotherapy. The studies were conducted worldwide including European, American and Asian countries between 1987 and 2012. Plasma, serum or whole blood selenium levels were common parameters used to assess the effects of radiotherapy and the selenium supplementation status. Selenium supplementation improved the general conditions of the patients, improved their quality of life and reduced the side effects of radiotherapy. At the dose of selenium used in these studies (200-500 µg/day), selenium supplementation did not reduce the effectiveness of radiotherapy, and no toxicities were reported. Selenium supplementation may offer specific benefits for several types of cancer patients who undergo radiotherapy. Because high-dose selenium and long-term supplementation may be unsafe due to selenium toxicity, more evidence-based information and additional research are needed to ensure the therapeutic benefits of selenium supplementation.

Reduced serum selenium concentration in miscarriage incidence of Indonesian subjects.

Selenium is an essential nutrient for human health, and maternal selenium concentration has been reported to be associated with pregnancy outcome. To further investigate the possible role of selenium (Se) in miscarriage, we conducted a case-control study to evaluate the correlations among selenium status, glutathione peroxidase activity, and spontaneous abortion. A total of 46 subjects with normal pregnancies and 25 subjects with spontaneous abortion were recruited, and their serum selenium concentrations and serum glutathione peroxidase activities were analyzed. The total serum selenium concentrations in subjects with normal pregnancies were significantly higher than those of subjects with spontaneous abortion; however, the glutathione peroxidase activities were similar in both groups. We further separated the subjects into smoking and nonsmoking groups, and the logistic regression analysis suggested that total serum selenium concentration, but not serum glutathione peroxidase activity or smoking, was significantly correlated with the incidence of miscarriage. The present study thus reaffirms that low serum selenium levels are associated with miscarriage and that selenium plays an important role in pregnancy maintenance.