Displaying publications 241 - 260 of 1525 in total

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  1. Ciminelli G, Garcia-Mandicó S
    J Public Health (Oxf), 2020 11 23;42(4):723-730.
    PMID: 32935849 DOI: 10.1093/pubmed/fdaa165
    BACKGROUND: There are still many unknowns about COVID-19. We do not know its exact mortality rate nor the speed through which it spreads across communities. This lack of evidence complicates the design of appropriate response policies.

    METHODS: We source daily death registry data for 4100 municipalities in Italy's north and match them to Census data. We augment the dataset with municipality-level data on a host of co-factors of COVID-19 mortality, which we exploit in a differences-in-differences regression model to analyze COVID-19-induced mortality.

    RESULTS: We find that COVID-19 killed more than 0.15% of the local population during the first wave of the epidemic. We also show that official statistics vastly underreport this death toll, by about 60%. Next, we uncover the dramatic effects of the epidemic on nursing home residents in the outbreak epicenter: in municipalities with a high share of the elderly living in nursing homes, COVID-19 mortality was about twice as high as in those with no nursing home intown.

    CONCLUSIONS: A pro-active approach in managing the epidemic is key to reduce COVID-19 mortality. Authorities should ramp-up testing capacity and increase contact-tracing abilities. Adequate protective equipment should be provided to nursing home residents and staff.

    Matched MeSH terms: Survival Analysis
  2. Nor Hafizah Zakaria, Mohammad Mustafizur Rahman, Ahmed Jalal Khan Chowdhury, Zaima Azira Zainal Abidin
    Sains Malaysiana, 2016;45:135-140.
    The application of microbial techniques in aquaculture has been playing a vital role to increase the production yield by improving the nutritional values of the targeted fish. Phototrophic purple bacteria as single cell protein (SCP) appears to be a promising substitution for protein rich supplement for aquaculture feeds making them a promising growth enhancer in aquaculture industry. Two species of phototrophic purple bacteria, Marichromatium sp. and Rhodopseudomonas sp. were used in the commercial diet to compare the growth, survival rate and feed utilizationon for Tor tambroides juvenile. Purple bacteria were isolated from mangrove sediment and fish tank and mass cultured using 112 synthetic media under anaerobic light condition. Bacterial cells were included in the diets by mixing the fresh biomass with the crushed commercial pellet, re-pelleted and air-dried. The experimental diets were fed to the fingerlings twice per day for 10 weeks to satiation level. The results showed that there were trends of increased growth, better survival rate and improved feed conversion ratio when fed with diet 1 (Marichromatium sp.) compared with other diets. There was significant difference (p<0.05) between the sampling days. The specific growth rate and weight gain of the fish fed with diet 1 were 0.49 % and 4.92 g, respectively, compared to 0.42% and 4.11 g from the control. This study suggested that purple bacteria could be used in feed formulation as a supplement to promote growth and survival of freshwater fishes in Malaysia.
    Matched MeSH terms: Survival Rate
  3. Syafaat MN, Muhammad T, Abol-Munafi AB, Ikhwanuddin M
    Data Brief, 2019 Oct;26:104438.
    PMID: 31528675 DOI: 10.1016/j.dib.2019.104438
    Population density, growth, survival, water quality and larval stage index of purple mud crab, Scylla tranquebarica at different feeding regimes and the data on ingestion rate of chosen microalgae, survival and larval development of blue swimming crab, Portunus pelagicus are presented. A twenty days of S. tranquebarica larval culture from zoeal 1 until megalopa stage under two different feeding regimes of A) Rotifer, Artemia nauplii and shrimp meat and B) Rotifer, Artemia nauplii and artificial feed is shared. A method on investigation of individual larvae of P. pelagicus capability to catch four different types of microalgae within 24 h is also shared. Direct eye observation, data collected through the larval rearing culture of S. tranquebarica and further statistical analysis were done daily until the crabs reached the megalopa stage. The result obtained from the optimum density of selected microalgae fed by individual larvae of P. pelagicus will be combined with the highest survival rate and larval stage index to develop feeding schedule for crab larvae P. pelagicus. This dataset has not previously been published and is of great potential for further comparison with other - and future investigation of various feeding regimes affected the crab culture. The collected information could be used as a standard feeding regime for nursery and hatchery seed production of others portunids crabs. The data described in this article are available as a supplementary file to this article.
    Matched MeSH terms: Survival Rate
  4. Yahya F, Gaffney K, Sengupta R
    Rheumatol Adv Pract, 2019;3(1):rkz012.
    PMID: 31432000 DOI: 10.1093/rap/rkz012
    Objectives: The aim was to define sub-optimal response to TNF inhibitors (TNFi), compare long-term drug survival rates and identify predictors of sub-optimal response in axial spondyloarthritis (axSpA) patients in a UK cohort.

    Methods: All axSpA patients attending two centres who commenced TNFi between 2002 and 2016 were included. Routinely recorded patient data were reviewed retrospectively. Patients with paired BASDAI at baseline, 3 and/or 6 months were included for analysis. Sub-optimal response was defined as achieving a ≥ 2-point reduction in BASDAI but not BASDAI50, post-treatment BASDAI remaining at ≥4, and in the opinion of the treating physician these patients demonstrated a meaningful clinical response.

    Results: Four hundred and ninety-nine patients were included: 82 (16.4%) patients were classified as having a sub-optimal response; 64 (78%) males, 78 (95.1%) AS and 55/67 (82.1%) HLA-B27 positive. Results are reported as the mean (s.d.). Time to diagnosis was 10 (8.6) years, age at diagnosis was 37 (11.7) years, and age at initiating index TNFi was 48 (11.1) years. Individual index TNFi were Humira (adalimumab, n = 41, 50%), Enbrel (etanercept, n = 27, 32.9%), Remicade (infliximab, n = 5, 6.1%), Simponi (golimumab, n = 3, 3.7%) and Cimzia (certolizumab pegol, n = 6, 7.3%). The rate of attrition was greater among sub-optimal responders at 2 and 5 years (P 

    Matched MeSH terms: Survival Rate
  5. Malwinder, S., Wan Zamaniah W.I., Cimmeran, K., Phua, V.C.E.
    JUMMEC, 2018;21(1):6-13.
    MyJurnal
    Objectives: Pancreatic cancer is an aggressive silent killer with a median survival of a few months. It is the
    fourth leading cause of cancer death in the United States. The aim of this study was to evaluate the prognostic
    factors affecting the survival of patients with adenocarcinoma of the pancreas in Malaysia.
    Methods: This retrospective study examined 107 patients with adenocarcinoma of the pancreas from 2002
    to 2012 at University Malaya Medical Centre. The factors evaluated were age, sex, race, smoking habits,
    performance status, the presence of jaundice, pre-treatment CA 19.9 serum level, the location of a primary
    tumour, tumour grade, tumour staging and intent of treatment.
    Results: The median survival for the overall study population was 7.0 months (95% CI 5.1-8.8 months) with
    1, 3, and 5-year survival rates of 30.8%, 8.4% and 3.7% respectively. The survival was 16.1 months (95% CI
    7.7-24.4 months) for stage 1, 15.5 months (95% CI 8.1-22.8 months) for stage 2, 8.4 months (95% CI 6.1-10.8
    months) for stage 3, and 3.8 months (95% CI 2.9-4.7 months) for stage 4. In multivariate analysis, independent
    and unfavourable prognostic factors which retained significance were performance status, tumour stage and
    treatment intent.
    Conclusions: The biological characteristics are important as predictors of survival in patients with pancreatic
    cancer. Longer survival is possible if the disease is identified in its early stages with good performance status.
    Further development and evaluation of novel screening strategies need to be established to improve early
    detection of this disease.
    Matched MeSH terms: Survival Rate
  6. Ma CH, Huang PY, Chang YC, Pan YJ, Azra MN, Chen LL, et al.
    Animals (Basel), 2021 Feb 02;11(2).
    PMID: 33540637 DOI: 10.3390/ani11020370
    Cannibalism is a major problem in lobster and crab aquaculture. Reducing the aggressive characteristics of lobsters and crabs can improve survival during the culturing process. In this study, juvenile scalloped spiny lobsters (Panulirus homarus) and crucifix crabs (Charybdis feriatus) were both cultured under different shelter and live prey conditions. Groups with shelter (seaweed and cotton filter) showed a better survival rate than the control group (no shelter; p < 0.05) for both Pa. homarus and Char. feriatus. Co-culturing with live prey (Litopenaeus vannamei) significantly benefited the juveniles of Pa. homarus and visibly increased the survival of juvenile Char. feriatus. Although providing shelter is currently the main method for reducing agonistic behavior, it must be continually altered as the lobsters and crabs grow. Live prey can grow and attract lobsters and crabs to hunt them, and live prey can be supplemented at any time. They can also be used as an additional source of income during the harvest season.
    Matched MeSH terms: Survival Rate
  7. Lim SH, Ng PK
    J Med Eng Technol, 2021 Feb;45(2):145-157.
    PMID: 33539247 DOI: 10.1080/03091902.2021.1873442
    A stretcher is a lightweight and portable apparatus used to facilitate the movement of patients who require medical care. While its design and functions have been known to man for over 600 years, there is still much room for improvement with regard to comfortability, mobility and ergonomics aspects. This study aims to synthesise design features from patents, journals and products for the conceptualisation of multifunctional stretchers. Based on the conceptual synthesis of this study, if a stretcher is redesigned to be foldable, then less storage space would be required, thus allowing the paramedic or medical person to store more stretchers and attend to multiple patients at a time. In comparison to a regular stretcher, a foldable stretcher would not only be smaller and more portable but would also help medical personnel reach the patient in a timelier manner. A reduction in response time for emergency medical services might increase the survival rate among patients who are in critical conditions. In the aspect of multifunctionality, the medical person may also be able to respond to different types of medical transportation needs. Multifunctional stretchers can increase the versatility of emergency medical service teams in adapting to different situations at a reduced cost.
    Matched MeSH terms: Survival Rate
  8. Izni Syamsina Saari, Nor Adila Kedin, Ainon Syazana Ab Hamid, Mohd Amirul Atan
    ESTEEM Academic Journal, 2019;15(1):33-43.
    MyJurnal
    In Malaysia, gastric cancer (also known as stomach cancer) is diagnosed at a complex stage and has poor prognosis. Most mortality cases due to gastric cancer diseases are potentially preventable. Thus greater efforts are needed for gastric cancer awareness to give adequate knowledge for Malaysians in order to be more cautious or alert in diagnosing the ailment much earlier. After all, early detection is the key towards improving the survival rate in gastric cancer patients. Hence, the aim of this study is to assess the youngsters’ awareness on the risk factors of gastric cancer. A survey using online forms was conducted on 350 students of UiTM Melaka, Alor Gajah Campus, to assess their awareness of risk factors regarding gastric cancer. Based on the regression analysis conducted, it can be highlighted that attitudes, knowledge, medication, education level and faculty (dummy) are some of the variables that were found to be the risk factors of the awareness on gastric cancer among these selected youngsters in the 21st century.
    Matched MeSH terms: Survival Rate
  9. Yahya F, Gaffney K, Hamilton L, Lonsdale E, Leeder J, Brooksby A, et al.
    Rheumatology (Oxford), 2018 Apr 01;57(4):619-624.
    PMID: 29272541 DOI: 10.1093/rheumatology/kex457
    Objectives: To analyse long-term survival and efficacy of TNFi, reasons for switching or discontinuing, baseline predictors of response and remission in axial spondyloarthritis (axSpA) patients in a UK cohort.

    Methods: All patients with a physician-verified diagnosis of axSpA attending two specialist centres who fulfilled the eligibility criteria for TNFi were included. Routinely recorded patient data were reviewed retrospectively. Initial TNFi was recorded as the index drug.

    Results: Six hundred and fifty-one patients (94% AS) were included; adalimumab (n = 332), etanercept (n = 205), infliximab (n = 51), golimumab (n = 40) and certolizumab pegol (n = 23) were index TNFi. The mean (s.d.) duration from symptom onset to time of diagnosis was 8.6 (8.7) years and mean (s.d.) duration from diagnosis to TNFi initiation was 12.6 (11.5) years. A total of 224 (34.4%) stopped index TNFi, and 105/224 switched to a second TNFi. Median drug survival for index and second TNFi were 10.2 years (95% CI: 8.8, 11.6 years) and 5.5 years (95% CI: 2.7, 8.3 years), respectively (P < 0.05). Survival rates were not influenced by choice of TNFi. HLA-B27 predicted BASDAI50 and/or two or more point reduction within 6 months and long-term drug survival (P < 0.05). Low disease activity was predicted by non-smoking and low baseline BASDAI (P < 0.05).

    Conclusion: We have observed good TNFi survival rates in axSpA patients treated in a real-life setting. This is best for first TNFi and not influenced by drug choice.

    Matched MeSH terms: Survival Rate
  10. Qudsiah Suliman, Salmiah Md. Said, Nor Afiah Mohd. Zulkefli, Lim Poh Ying, Tan Kit-Aun
    MyJurnal
    Introduction: Despite advancement of treatment modalities, Tuberculosis (TB) treatment interruption rate has glob- ally accelerating, calling for greater framework shifting towards psychosocial intervention. Similarly, Selangor state had reported the perturbing TB treatment interruption rate, which was figured persistently above 10% in the interval year of 2014 to 2018, thus signifies an empirical assessment on Information-Motivation-Behavioural skills (IMB) determinants of TB intensive phase treatment. This study aims to determine the time to intensive phase TB treatment interruption and its prognostic factors among newly diagnosed pulmonary Tuberculosis (PTB) smear positive patients in urban district Selangor. Methods: A multi-centric prospective cohort study will recruit 695 newly diagnosed PTB smear positive patients at treatment centres in urban districts, Selangor. This study will utilize validated self-admin- istered questionnaire and standardised data collection form (PROFORMA). At baseline, we will elicit information on IMB models constructs, additionally on socio-demographics, health service factors and clinical characteristics. Meanwhile, four points follow up will be executed to retrieve information on treatment status and time varying effects of body weight, treatment side effects, symptoms improvement and internalised stigma. Finally, survival analysis will be computed to identify the time to intensive phase treatment interruption and its prognostic factors. Conclusion: This study will enlighten IMB model determinants of intensive phase treatment interruption, hence to endeavour psychosocial elements in designing time relevant public health strategies in TB case management.
    Matched MeSH terms: Survival Analysis
  11. KHATIJAH LIM ABDULLAH
    MyJurnal
    With advances in medicine, more and more premature infants who require round-the-clock nursing care due to one or more complex medical conditions are able to survive after receiving intensive treatment in the neonatal intensive care unit (NICU). The increased survival rate has resulted in a higher incidence of morbidity that may impose emotional and financial burdens on families, society and the healthcare system. This paper explores the experiences of mothers with premature babies who were admitted to a NICU. A generic qualitative approach was used to gain insights into the effects of the premature baby admission to a NICU through tape recorded semi structured open-ended questions interviews with 17 mothers whose premature babies were admitted to a NICU. Inductive thematic analysis was used to identify, analyse, and report themes and patterns within the data. Qualitative analysis of the descriptive data obtained from 17 mothers identified four major themes and 13 sub themes relating to avoidance, effects of the separation, ceremonies and inadequate preparation. The findings have several implications for practice by care professionals. It can help nurses to develop interventions to prepare mothers to cope with new situations, decreasing stress and psychological problems regarding the admission of their infants to the NICU.
    Matched MeSH terms: Survival Rate
  12. Karuthan SR, Koh PS, Chinna K, Chan WK
    Med J Malaysia, 2021 03;76(2):199-204.
    PMID: 33742628
    INTRODUCTION: We aimed to compare the Barcelona Clinic Liver Cancer (BCLC) and Hong Kong Liver Cancer (HKLC) staging systems.

    MATERIALS AND METHODS: This is a retrospective study on patients with newly diagnosed hepatocellular carcinoma (HCC) at the University Malaya Medical Centre between 2011 and 2014. Survival times were analysed using the Kaplan- Meier procedure and comparison between groups was done using the log rank test.

    RESULTS: The data of 190 patients was analysed. Chronic hepatitis B was the most common aetiology for HCC (43.7%), but a large proportion was cryptogenic or non-alcoholic steatohepatitis-related (41.6%). Only 11.1% were diagnosed early (BCLC Stage 0-A) while majority were diagnosed at an intermediate stage (BCLC Stage B, 53.7%). The median survival rate was significantly different between the different groups when either of the staging systems was used (p<0.05 for all comparisons). However, the two staging systems lacked agreement (weighted kappa 0.519, 95%CI: 0.449, 0.589) with significant difference in median survival rates between BCLC Stage A and HKLC Stage 2, and between BCLC Stage C and HKLC Stage 4.

    CONCLUSION: Both staging systems were able to stratify patients according to survival, but they only had moderate agreement with significant differences observed in two groups of the staging systems.

    Matched MeSH terms: Survival Rate
  13. Seok Fang Oon, Meenakshii Nallappan, Mohd Shazrul Fazry Sa’ariwijaya, Nur Kartinee Kassim, Shamarina Shohaimi, Thiam Tsui Tee, et al.
    MyJurnal
    ABSTRACTS FOR INTERNATIONAL HEALTH AND MEDICAL SCIENCES CONFERENCE 2019 (IHMSC 2019). Accelerating Innovations in Translational and Precision Medicine. Held at Taylor’s University Lakeside Campus, Subang Jaya, Selangor, Malaysia. 8-9th March, 2019
    Introduction: According to the National Health and Morbidity Survey (NHMS) 2015, 47.7% of the Malaysian population are either obese or overweight. The increased obesity prevalence has caused major health problems including cardiovascular diseases and diabetes. Although several anti-obesity drugs have been developed, they are limited due to adverse side effects. Previous studies demonstrated that xanthorrhizol (XNT) reduced the levels of serum free fatty acid and triglyceride in vivo, but the detailed anti-obesity activities and its related mechanisms are yet to be reported. Thus, this study aims to evaluate its abilities to inhibit adipocyte hyperplasia and hypertrophy employing 3T3-L1 adipocytes.
    Methods: Statistical significance was established by one-way ANOVA, where p < 0.05 was considered statistically significant.
    Results: In this study, the IC50 value of XNT (98.3% purity) from Curcuma xanthorrhiza Roxb. in 3T3-L1 adipocytes was 35 ± 0.24 μg/mL. The loss of cell viability was due to 20.01 ± 2.77% of early apoptosis and 24.13 ± 2.03% of late apoptosis. XNT elicited apoptosis via up-regulation of caspase-3 and cleaved PARP-1 protein expression for 4.09-fold and 3.12-fold, respectively. Moreover, XNT decreased adipocyte differentiation for 36.13 ± 3.64% and reduced GPDH activity to 52.26 ± 4.36%. The underlying mechanism was due to impaired expression of PPARγ to 0.36-fold and FAS to 0.38-fold, respectively. On the other hand, XNT increased glycerol release by 45.37 ± 6.08% compared to control. During lipolysis, XNT up-regulated the leptin protein for 2.08-fold but down-regulated the protein level of insulin to 0.36-fold. These results indicated that XNT reduced the volume of adipocytes through modulation of leptin and insulin.
    Conclusion: To conclude, XNT exerted its anti-obesity mechanisms by suppression of adipocyte hyperplasia through induction of apoptosis and inhibition of adipogenesis whilst reduction of adipocyte hypertrophy through stimulation of lipolysis. Thus, XNT could be developed as a potential anti-obesity agent in the future.
    Matched MeSH terms: Cell Survival
  14. Lau MY, Teng FE, Chua KH, Ponnampalavanar S, Chong CW, Abdul Jabar K, et al.
    Pathogens, 2021 Mar 02;10(3).
    PMID: 33801250 DOI: 10.3390/pathogens10030279
    The emergence of carbapenem-resistant Klebsiella pneumoniae (CRKP) is a great concern, as carbapenems are the last-line therapy for multidrug-resistant Gram-negative bacteria infections. This study aims to report the epidemiology of CRKP in a teaching hospital in Malaysia based on the molecular genotypic and clinical characteristics of the isolates. Sixty-three CRKP strains were isolated from a tertiary teaching hospital from January 2016 until August 2017. Carbapenemase genes were detected in 55 isolates, with blaOXA-48 (63.5%) as the predominant carbapenemase gene, followed by blaNDM (36.5%). At least one porin loss was detected in nine isolates. Overall, 63 isolates were divided into 30 clusters at similarity of 80% with PFGE analysis. Statistical analysis showed that in-hospital mortality was significantly associated with the usage of central venous catheter, infection or colonization by CRKP, particularly NDM-producers. In comparison, survival analysis using Cox proportional hazards regression identified a higher hazard ratio for patients with a stoma and patients treated with imipenem but a lower hazard ratio for patients with NDM-producing CRKP. OXA-48 carbapenemase gene was the predominant carbapenemase gene in this study. As CRKP infection could lead to a high rate of in-hospital mortality, early detection of the isolates was important to reduce their dissemination.
    Matched MeSH terms: Survival Analysis
  15. Mohd. Arifin Kaderi, Kahairi Abdullah, Wan Ishlah Leman, Azmir Ahmad
    MyJurnal
    Head and neck cancer (HNC) is among the common cancer in Malaysia. Depending on the location of the cancer in head and neck region, each type of HNC has its own characteristics and prevalence to specific gender and ethnicity. The remote and inaccessible location of the cancer also cause the difficulty to detect the cancer. This make the cancer usually diagnosed at late stage and make the treatment very challenges and ended with low survival rate of post-treatment among HNC patients. In fact, the detection of HNC at early stage could promise high successful recovery rate. This situation demand lots of studies to explore the carcinogenesis of HNC and searching for robust diagnostic, prognostic and therapeutic biomarkers. MicroRNA (miRNA) is a class of non-coding RNA that regulate cellular physiology at post-transcriptional level. miRNAs expression has
    been found to deregulate in various disease state, including cancer. A few studies revealed that miRNAs can behave as oncogenic and tumour suppressor in HNC. Even HNC is common in Malaysia, the studies of miRNA in HNC are still scarce. In this review article, we highlight the studies of miRNA in HNC that have been published by Malaysian researchers with aim to call more Malaysian researchers to focus on miRNA researches in HNC.
    Matched MeSH terms: Survival Rate
  16. Prabu S, Samad NA, Ahmad NA, Jumbri K, Raoov M, Rahim NY, et al.
    Carbohydr Res, 2020 Nov;497:108138.
    PMID: 32911205 DOI: 10.1016/j.carres.2020.108138
    The behavior of the inclusion behavior of guanosine (GU) with beta-cyclodextrin (β-CD) in the liquid, solid and virtual state were investigated. The absorption and fluorescence spectral were used to determine the inclusion behavior in liquid state. FT-IR, NMR, TGA, DSC, PXRD and FESEM techniques were used to investigate the inclusion behavior in solid-state, meanwhile the virtual state studies are done by molecular docking. The solid inclusion complex (GU: β-CD) was prepared by using the co-precipitation method. The binding constant (K) of (GU: β-CD) was calculated by using Benesi-Hildebrand. Besides that, the 1:1 stoichiometric ratio of inclusion complex was confirmed by using the Benesi-Hildebrand plot and Job's plot of continuous variation method. The most preferable model of GU: β-CD that suggested via molecular docking studies was in good agreement with experimental results. The inclusion complex of GU: β-CD exerted its toxicity effects towards HepG2 cell lines based on the reduced number of cell viability and lowest IC50 value compared to the GU and β-CD viability.
    Matched MeSH terms: Cell Survival
  17. Cheah Yoke Kqueen, Yaghma Masood, Nurul Syakima Ab Mutalib, Sethu Thakachy Subha, Norhafizah Mohtarrudin
    MyJurnal
    MicroRNAs (miRNAs) are small noncoding RNAs that involved in various normal and cancer-related cellular pro-cesses. Studies on expression profiling of miRNAs have been performed and the data showed that some miRNAs are up-regulated or down-regulated in cancer. miRNAs play a crucial role in HNSCC development, metastasis, prognosis and survival rate. Several studies have been conducted previously to investigate that use of miRNAs as the biomark-ers in disease diagnostic/prognostic and potential therapeutic targets management that may improve the outcomes of HNSCC. Our previous study revealed that upregulation of oncogenic miRNAs including hsa-miR-181a-2*, hsa-miR-29b-1*, hsa-miR-181a, hsa-miR-181b, hsa-miR-744, hsa-miR-1271 and hsa-miR-221* were able to distinguish HNSCC from normal samples. These miRNAs may contribute in a simple profiling strategy to identify individuals at higher risk of developing head and neck cancers, thus helping in the elucidation of the molecular mechanisms involved in head and neck cancer pathogenesis.
    Matched MeSH terms: Survival Rate
  18. Zainudin Nh M, R A, W N R
    J Biomed Phys Eng, 2020 Jun;10(3):319-328.
    PMID: 32637376 DOI: 10.31661/jbpe.v0i0.1135
    Background: Radiation induced bystander effects (RIBEs) occurs in unirradiated cells exhibiting indirect biological effect as a consequence of signals from other irradiated cells in the population.

    Objective: In this study, bystander effects in MCF-7 breast cancer cells and hFOB 1.19 normal osteoblast cells irradiated with gamma emitting HDR Brachytherapy Ir-192 source were investigated.

    Material and Methods: In this in-vitro study, bystander effect stimulation was conducted using medium transfer technique of irradiated cells to the non-irradiated bystander cells. Cell viability, reactive oxygen species (ROS) generation and colony forming assay was employed to evaluate the effect.

    Results: Results indicate that the exposure to the medium irradiated MCF-7 induced significant bystander killing and decreased the survival fraction of bystander MCF-7 and hFOB from 1.19 to 81.70 % and 65.44 %, respectively. A significant decrease in survival fraction was observed for hFOB 1.19 bystander cells (p < 0.05). We found that the rate of hFOB 1.19 cell growth significantly decreases to 85.5% when added with media from irradiated cells. The ROS levels of bystander cells for both cell lines were observed to have an increase even after 4 h of treatment. Our results suggest the presence of bystander effects in unirradiated cells exposed to the irradiated medium.

    Conclusion: These data provide evidence that irradiated MCF-7 breast cancer cells can induce bystander death in unirradiated MCF-7 and hFOB 1.19 bystander cells. Increase in cell death could also be mediated by the ROS generation during the irradiation with HDR brachytherapy.

    Matched MeSH terms: Cell Survival
  19. Zain RB, Pateel DGS, Ramanathan A, Kallarakkal TG, Wong GR, Yang YH, et al.
    J Cancer Educ, 2020 Aug 21.
    PMID: 32821988 DOI: 10.1007/s13187-020-01814-1
    Early diagnosis of oral cancer results in less aggressive treatment and improves the quality of life and overall 5-year survival rate. Well-trained dental professionals can play a crucial role in the early detection of oral cancers. The present study aims to determine the effectiveness of the training program "OralDETECT", a spaced repetitive, test-enhanced learning tool with a corrective feedback mechanism for early detection of oral cancer. Thirty-two dentists and 259 dental students from three Malaysian dental schools were involved in this study. All participants were trained and calibrated to recognize oral potentially malignant disorders (OPMD) and oral cancer using "OralDETECT", which is comprised of a series of pre-test, lecture, post-tests and review sessions. The percentage of correct answers (scores) for each test given by the participants was calculated and analysed using a paired t test. It was found that the overall percentage of diagnostic accuracy for both dental professionals and student groups increased to above 80% from the pre-tests to the final post-tests. There was a significant improvement in overall scores between the pre-tests and all three post-tests for the dental professional groups and the student groups. The diagnostic accuracy for individual OPMD and lesions suspicious of oral cancer also increased to above 80% for both groups. The results of our study demonstrate that the "OralDETECT" is an efficient and effective competency tool which can be used to train dental professionals and students for the early detection of OPMD and oral cancer.
    Matched MeSH terms: Survival Rate
  20. Harnentis H, Marlida Y, Nur YS, Wizna W, Santi MA, Septiani N, et al.
    Vet World, 2020 Sep;13(9):1922-1927.
    PMID: 33132606 DOI: 10.14202/vetworld.2020.1922-1927
    Background and Aim: Probiotics play an important role in maintaining a healthy gut and consequently promote good health. This study aimed to find novel probiotic lactic acid bacteria (LAB) from indigenous fermented foods of West Sumatera, Indonesia.

    Materials and Methods: This study utilized 10 LAB previously isolated from fermented buffalo milk (dadih), fermented fish (budu), and fermented cassava (tape) which have the ability to produce gamma-aminobutyric acid. The study commenced with the screening of LAB for certain properties, such as resistance to acid and bile salts, adhesion to mucosal surface, and antagonism against enteric pathogens (Escherichia coli, Salmonella Enteritidis, and Staphylococcus aureus). The promising isolates were identified through biochemical and gram staining methods.

    Results: All isolates in this study were potential novel probiotics. They survived at a pH level of 2.5 for 3 h (55.27-98.18%) and 6 h (50.98-84.91%). Survival in bile at a concentration of 0.3% was 39.90-58.61% and the survival rate was 28.38-52.11% at a concentration of 0.5%. The inhibitory diameter ranged from 8.75 to 11.54 mm for E. coli, 7.02 to 13.42 mm for S. aureus, and 12.49 to 19.00 mm for S. Enteritidis. All the isolates (84.5-92%) exhibited the ability to adhere to mucosal surfaces. This study revealed that all the isolates were potential probiotics but N16 proved to be superior because it was viable at a pH level of 2 (84.91%) and it had a good survival rate in bile salts assay (55.07%). This isolate was identified as Lactobacillus spp., Gram-positive bacilli bacteria, and tested negative in both the catalase and oxidase tests.

    Conclusion: All the isolates in this study may be used as probiotics, with isolate N16 (Lactobacillus spp.) as the most promising novel probiotic for poultry applications based on its ability to inhibit pathogenic bacteria.

    Matched MeSH terms: Survival Rate
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