Browse publications by year: 2019

  1. Masud F, Abdullah AH, Abdul-Salaam G
    PLoS One, 2019;14(12):e0225518.
    PMID: 31790457 DOI: 10.1371/journal.pone.0225518
    This paper proposes an emergency Traffic Adaptive MAC (eTA-MAC) protocol for WBANs based on Prioritization. The main advantage of the protocol is to provide traffic ranking through a Traffic Class Prioritization-based slotted-Carrier Sense Multiple Access/Collision Avoidance (TCP-CSMA/CA) scheme. The emergency traffic is handled through Emergency Traffic Class Provisioning-based slotted-CSMA/CA (ETCP-CSMA/CA) scheme. The emergency-based traffic adaptivity is provided through Emergency-based Traffic Adaptive slotted-CSMA/CA (ETA-CSMA/CA) scheme. The TCP-CSMA/CA scheme assigns a distinct, minimized and prioritized backoff period range to each traffic class in every backoff during channel access in Contention Access Period (CAP). The ETCP-CSMA/CA scheme delivers the sporadic emergency traffic that occurs at a single or multiple BMSN(s) instantaneously, with minimum delay and packet loss. It does this while being aware of normal traffic in the CAP. Then, the ETA-CSMA/CA scheme creates a balance between throughput and energy in the sporadic emergency situation with energy preservation of normal traffic BMSNs. The proposed protocol is evaluated using NS-2 simulator. The results indicate that the proposed protocol is better than the existing Medium Access Control (MAC) protocols by 86% decrease in packet delivery delay, 61% increase in throughput, and a 76% decrease in energy consumption.
    MeSH terms: Algorithms; Emergency Medical Service Communication Systems*; Humans; Time Factors; Remote Sensing Technology/instrumentation; Remote Sensing Technology/methods*; Wireless Technology/instrumentation*
  2. Agbolade O, Nazri A, Yaakob R, Ghani AA, Cheah YK
    BMC Bioinformatics, 2019 Dec 02;20(1):619.
    PMID: 31791234 DOI: 10.1186/s12859-019-3153-2
    BACKGROUND: Expression in H-sapiens plays a remarkable role when it comes to social communication. The identification of this expression by human beings is relatively easy and accurate. However, achieving the same result in 3D by machine remains a challenge in computer vision. This is due to the current challenges facing facial data acquisition in 3D; such as lack of homology and complex mathematical analysis for facial point digitization. This study proposes facial expression recognition in human with the application of Multi-points Warping for 3D facial landmark by building a template mesh as a reference object. This template mesh is thereby applied to each of the target mesh on Stirling/ESRC and Bosphorus datasets. The semi-landmarks are allowed to slide along tangents to the curves and surfaces until the bending energy between a template and a target form is minimal and localization error is assessed using Procrustes ANOVA. By using Principal Component Analysis (PCA) for feature selection, classification is done using Linear Discriminant Analysis (LDA).

    RESULT: The localization error is validated on the two datasets with superior performance over the state-of-the-art methods and variation in the expression is visualized using Principal Components (PCs). The deformations show various expression regions in the faces. The results indicate that Sad expression has the lowest recognition accuracy on both datasets. The classifier achieved a recognition accuracy of 99.58 and 99.32% on Stirling/ESRC and Bosphorus, respectively.

    CONCLUSION: The results demonstrate that the method is robust and in agreement with the state-of-the-art results.

    MeSH terms: Algorithms*; Analysis of Variance; Facial Expression*; Humans; Pattern Recognition, Automated*; Discriminant Analysis; Databases as Topic; Imaging, Three-Dimensional*; Principal Component Analysis
  3. Muhamad Adyab NS, Rahmat A, Abdul Kadir NAA, Jaafar H, Shukri R, Ramli NS
    BMC Complement Altern Med, 2019 Dec 02;19(1):344.
    PMID: 31791316 DOI: 10.1186/s12906-019-2764-5
    BACKGROUND: Mangosteen is a native fruit from Southeast Asia. It is rich in phenolic compounds such as xanthones, anthocyanins and phenolic acids. Mangosteen pericarp extract showed inhibitory activity towards pancreatic lipase and may have potential use for obesity treatment. However, there is limited study on the beneficial effects of mangosteen flesh against obesity. This study aimed to investigate the effects of Garcinia mangostana flesh (GMF) on biochemical and morphological changes in the liver and kidney of high-fat diet-induced obese rats.

    METHODS: Forty healthy Sprague-Dawley rats were randomised into five groups (n = 8) with four groups were fed with high-fat diet (HFD) for 10 weeks and a control group was fed with rat chow diet. Supplementation with GMF in obese rats was continued for 7 weeks starting from week 10th after the initiation of HFD at different doses (200 mg/kg, 400 mg/kg and 600 mg/kg). The positive and negative control rats were given distilled water via oral gavage. Plasma lipid profile, antioxidant enzymes and pro-inflammatory markers were determined using commercial kits. Liver and kidney structure were defined by histology.

    RESULTS: The rats fed with HFD for 10 weeks increased plasma LDL-cholesterol, reduced plasma glutathione peroxidase level and had significantly higher body weight compared to normal control rats (p 

  4. Jumbri IA, Ikeda S, Jimichi M, Saka C, Managi S
    Int J Equity Health, 2019 12 02;18(1):188.
    PMID: 31791346 DOI: 10.1186/s12939-019-1096-x
    BACKGROUND: The decline in global and between-country health inequality is a major challenge to overcome. However, few studies have systematically investigated the relationship between inequality of health stock and national wealth. From an economic perspective, health can be viewed as a durable capital stock that produces an output of healthy time. Therefore, in this paper, we focused on health capital to investigate the relationship between inequalities of national health and national wealth.

    METHODS: Based on health stock data from 1990 to 2015 for 140 countries, we estimated Gini coefficients of health stock to investigate associations with a well-known economic flow indicator, Gross Domestic Product (GDP), stock-based national wealth indicator, Inclusive Wealth Index (IWI), and firm-level net income.

    RESULTS: The estimated Gini coefficient of global health stock shows that health stock has experienced a global decline. The Gini coefficient for low-income countries (LICs) showed the fastest decline in health stock, dropping from 0.69 to 0.66 in 25 years. Next, rapid population growth and the rise in the youth share of the working-age population in LICs were most likely contributing factors to the decline in inequality. Most countries that experienced positive health stock growth also indicated a strong positive relationship with GDP and IWI. However, some countries showed a negative relationship with natural capital, which is a part of IWI. In addition, firm-level net income showed no obvious associations with health stock, GDP and IWI.

    CONCLUSIONS: We argue that a negative relationship between health stock and natural capital is a sign of unstable development because sustainable development involves maintaining not only GDP but also IWI, as it is a collective set of assets or wealth comprising human, produced and natural capital. Moreover, in our analysis of firm-level income data, we also discuss that income will be influenced by other factors, such as innovations, human resources, organization culture and strategy. Therefore, the paper concludes that health stock is a vital component in measuring health inequality and health-related Sustainable Development Goals (SDGs). Thus, IWI is more comprehensive in measuring national wealth and can complement GDP in measuring progress toward sustainable development.

    MeSH terms: Humans; Socioeconomic Factors; Global Health/statistics & numerical data*; Health Status Disparities*; Gross Domestic Product/statistics & numerical data*
  5. Law JW, Chan KG, He YW, Khan TM, Ab Mutalib NS, Goh BH, et al.
    Sci Rep, 2019 12 03;9(1):15262.
    PMID: 31792235 DOI: 10.1038/s41598-019-51622-x
    Streptomycetes have been the center of attraction within scientific community owing to their capability to produce various bioactive compounds, for instance, with different antimicrobial, anticancer, and antioxidant properties. The search for novel Streptomyces spp. from underexplored area such as mangrove environment has been gaining attention since these microorganisms could produce pharmaceutically important metabolites. The aim of this study is to discover the diversity of Streptomyces spp. from mangrove in Sarawak and their bioactive potentials - in relation to antioxidant and cytotoxic activities. A total of 88 Streptomyces isolates were successfully recovered from the mangrove soil in Kuching, state of Sarawak, Malaysia. Phylogenetic analysis of all the isolates and their closely related type strains using 16S rRNA gene sequences resulted in 7 major clades in the phylogenetic tree reconstructed based on neighbour-joining algorithm. Of the 88 isolates, 18 isolates could be considered as potentially novel species according to the 16S rRNA gene sequence and phylogenetic analyses. Preliminary bioactivity screening conducted on the potential novel Streptomyces isolates revealed significant antioxidant activity and notable cytotoxic effect against tested colon cancer cell lines (HCT-116, HT-29, Caco-2, and SW480), with greater cytotoxicity towards SW480 and HT-29 cells. This study highlighted that the Sarawak mangrove environment is a rich reservoir containing streptomycetes that could produce novel secondary metabolites with antioxidant and cytotoxic activities.
    MeSH terms: Antineoplastic Agents/pharmacology; Antineoplastic Agents/chemistry; Antioxidants/pharmacology; Antioxidants/chemistry*; Humans; Phylogeny; RNA, Ribosomal, 16S/genetics; Soil Microbiology; Streptomyces/genetics; Streptomyces/chemistry*; Caco-2 Cells; HCT116 Cells; Cell Proliferation/drug effects*; Wetlands*
  6. Sunthonkun P, Palajai R, Somboon P, Suan CL, Ungsurangsri M, Soontorngun N
    Sci Rep, 2019 12 02;9(1):18061.
    PMID: 31792269 DOI: 10.1038/s41598-019-54448-9
    Benefits of whole grains as dietary supplements and active ingredients in health products have been promoted. Despite being neglected as an agricultural byproduct of polished rice, pigmented rice bran has emerged as a promising source of natural anti-aging compounds. Indeed, the extract of red rice bran Hom Dang cultivar contained rich phenolic acids and flavonoids. It displayed high antioxidant activities in vitro and in vivo assays. Using yeast model, extract and bioactive compounds, quercetin and protocatechuic acid found in the rice bran pericarp, effectively reduced levels of intracellular reactive oxygen species (ROS), restored plasma membrane damages and prolonged life-span of pre-treated wild-yeast cells. Importantly, these molecules modulated life span-extension through a mechanism of ROS reduction that resembles to that operated under the highly conserved Tor1- and Sir2-dependent signaling pathways, with the human homologs TORC1 and SIRT1, respectively. The key longevity factors Sch9 and Rim15 kinases, Msn2/4 regulators and a novel transcription factor Asg1, the antioxidant enzymes superoxide dismutases and glutathione peroxidases played important role in mediating longevity. Yeast clearly provides an instrumental platform for rapid screening of compounds with anti-aging efficacies and advances knowledge in the molecular study of ageing.
    MeSH terms: Antioxidants/pharmacology*; Cell Membrane/drug effects; Drug Evaluation, Preclinical/methods; Plant Extracts/pharmacology*; Oryza/chemistry*; Saccharomyces cerevisiae/cytology; Saccharomyces cerevisiae/drug effects*; Saccharomyces cerevisiae/physiology; Time Factors; Signal Transduction/drug effects; Cell Aging/drug effects*; Reactive Oxygen Species/metabolism
  7. Yap WS, Dolzhenko AV, Jalal Z, Hadi MA, Khan TM
    Sci Rep, 2019 12 02;9(1):18042.
    PMID: 31792285 DOI: 10.1038/s41598-019-54529-9
    A systematic review and network-meta analysis (NMA) were performed to estimate significance of the anxiolytic effect of lavender essential oil taken as silexan capsules versus other comparators (i.e., placebo/paroxetine/lorazepam). The outcome of interest was Hamilton Anxiety Scale (HAMA). Weighted mean differences (WMD) were calculated to estimate the treatment effect at the confidence interval of 95%. League tables were generated using treatment effect, for all pairwise comparisons, where WMD 
    MeSH terms: Anxiety Disorders/diagnosis; Anxiety Disorders/drug therapy*; Capsules; Humans; Lorazepam/administration & dosage; Oils, Volatile/administration & dosage*; Personality Assessment/statistics & numerical data; Plant Oils/administration & dosage*; Anti-Anxiety Agents/administration & dosage*; Treatment Outcome; Paroxetine/administration & dosage; Lavandula/chemistry*; Network Meta-Analysis
  8. Noorizhab Fakhruzzaman MN, Abidin NZ, Aziz ZA, Lim WF, Richard JJ, Noorliza MN, et al.
    Int J Mycobacteriol, 2019 12 4;8(4):320-328.
    PMID: 31793500 DOI: 10.4103/ijmy.ijmy_144_19
    Background: Tuberculosis (TB) is still a major health problem in Malaysia with thousands of cases reported yearly. This is further burdened with the emergence of multidrug-resistant TB (MDR-TB). Whole-genome sequencing (WGS) provides high-resolution molecular epidemiological data for the accurate determination of Mycobacterium tuberculosis complex (MTBC) lineages and prediction of the drug-resistance patterns. This study aimed to investigate the diversity of MTBC in Malaysia in terms of lineage and drug-resistance patterns of the clinical MTBC isolates using WGS approach.

    Methods: The genomes of 24 MTBC isolated from sputum and pus samples were sequenced. The phenotypic drug susceptibility testing (DST) of the isolates was determined for ten anti-TB drugs. Bioinformatic analysis comprising genome assembly and annotation and single-nucleotide polymorphism (SNP) analysis in genes associated with resistance to the ten anti-TB drugs were done on each sequenced genome.

    Results: The draft assemblies covered an average of 97% of the expected genome size. Eleven isolates were aligned to the Indo-Oceanic lineage, eight were East-Asian lineage, three were East African-Indian lineage, and one was of Euro-American and Bovis lineages, respectively. Twelve of the 24 MTBC isolates were phenotypically MDR M. tuberculosis: one is polyresistance and another one is monoresistance. Twenty-six SNPs across nine genes associated with resistance toward ten anti-TB drugs were detected where some of the mutations were found in isolates that were previously reported as pan-susceptible using DST. A haplotype consisting of 65 variants was also found among the MTBC isolates with drug-resistance traits.

    Conclusions: This study is the first effort done in Malaysia to utilize 24 genomes of the local clinical MTBC isolates. The high-resolution molecular epidemiological data obtained provide valuable insights into the mechanistic and epidemiological qualities of TB within the vicinity of Southeast Asia.

    MeSH terms: Antitubercular Agents/pharmacology*; Antitubercular Agents/therapeutic use; Genotype; Humans; Malaysia/epidemiology; Microbial Sensitivity Tests; Mutation; Mycobacterium tuberculosis/drug effects*; Mycobacterium tuberculosis/genetics*; Tuberculosis/microbiology*; Tuberculosis/epidemiology; Genome, Bacterial; Tuberculosis, Multidrug-Resistant/microbiology*; Tuberculosis, Multidrug-Resistant/epidemiology; Polymorphism, Single Nucleotide; Drug Resistance, Multiple, Bacterial/genetics*
  9. Wattanakul J, Sahaka M, Amara S, Mansor S, Gontero B, Carrière F, et al.
    Food Funct, 2019 Dec 11;10(12):7806-7817.
    PMID: 31793593 DOI: 10.1039/c9fo01867k
    The removal of intact chloroplasts from their cell wall confinement offers a novel way to obtain lipophilic nutrients from green biomass, especially carotenoids and galactolipids. These latter are the main membrane lipids in plants and they represent a major source of the essential α-linolenic acid (18:3; ALA). Nevertheless, knowledge on their digestion is still limited. We have developed a physical method of recovering a chloroplast-rich fraction (CRF) from green biomass and tested its digestibility in vitro under simulated gastrointestinal conditions. Using a two-step static model, CRF from both spinach leaves and postharvest, pea vine field residue (haulm) were first exposed to enzymes from rabbit gastric extracts and then either to pancreatic enzymes from human pancreatic juice (HPJ) or to porcine pancreatic extracts (PPE). The lipolysis of monogalactosyldiacylglycerol (MGDG) and digalactosyl diacylglycerol (DGDG) was monitored by thin layer chromatography and gas chromatography of fatty acid methyl esters. For both CRF preparations, MGDG and DGDG were converted to monogalactosylmonoacylglycerol (MGMG) and digalactosylmonoacylglycerol (DGMG), respectively, during the intestinal phase and ALA was the main fatty acid released. Galactolipids were more effectively hydrolysed by HPJ than by PPE, and PPE showed a higher activity on MGDG than on DGDG. These findings may be explained by the higher levels of galactolipase activity in HPJ compared to PPE, which mainly results from pancreatic lipase-related protein 2. Thus, we showed that CRF galactolipids are well digested by pancreatic enzymes and represent an interesting vehicle for ALA supplementation in human diet.
  10. Balusamy SR, Veerappan K, Ranjan A, Kim YJ, Chellappan DK, Dua K, et al.
    Phytomedicine, 2019 Oct 31;66:153129.
    PMID: 31794911 DOI: 10.1016/j.phymed.2019.153129
    BACKGROUND: Phyllanthus emblica L. (Indian gooseberry) is widely used in the Ayurveda for thousands of years to treat health complications including disorders of the immune system, diabetes, and obesity.

    PURPOSE: For the first time, our study aims to demonstrate the molecular mechanisms of the fruit extract of Phyllanthus emblica (PEFE) involved in the promotion of fat cell apoptosis and alleviation of adipogenesis.

    METHODS: The active constituents from PEFE were identified using high performance liquid chromatography-mass spectrometry (HPLC-MS). We carried out the 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyl tetrazolium bromide (MTT) assay to evaluate the cytotoxic effects of PEFE using 3T3-L1 pre-adipocytes. The colonogenic assay was carried out to determine the inhibitory effect of 3T3-L1 adipocytes after PEFE treatment. In addition, inhibition of pancreatic lipase activity was performed and the lipolytic activity of PEFE and digallic acid was compared with the well-known standard drug orlistat. Besides, the molecular interaction and ligand optimization between digallic and adipogenesis/apoptosis markers were also carried out. Furthermore, to confirm fat cell apoptosis we have used several detection methods that includes Hoechst staining, PI staining, Oil staining and qPCR respectively.

    RESULTS: Digallic acid was identified as a major component in the PEFE. The IC50 values of digallic acid and PEFE were found to be 3.82 µg/ml and 21.85 µg/ml respectively. PEFE and digallic acid showed significant anti-lipolytic activity compared to the standard drug orlistat. In the mature adipocytes, PEFE significantly decreased triglyceride accumulation by downregulating adiponectin, PPARγ, cEBPα, and FABP4 respectively. We further analyzed the expression of apoptosis related genes upon PEFE treatment. Apoptotic process initiated through upregulation of BAX and downregulation of BCL2 resulting in an increased caspase-3 activity. In addition, we have also confirmed the apoptosis and DNA fragmentation in 3T3-L1 cells using Hoechst, PI and TUNEL assays.

    CONCLUSION: PEFE negatively regulates adipogenesis by initiating fat cell apoptosis and therefore it can be considered as a potential herbal medicinal product for treating obesity.

  11. Chan Y, Ng SW, Xin Tan JZ, Gupta G, Tambuwala MM, Bakshi HA, et al.
    Chem Biol Interact, 2019 Nov 28;315:108911.
    PMID: 31786185 DOI: 10.1016/j.cbi.2019.108911
    Over the years, the attention of researchers in the field of modern drug discovery and development has become further intense on the identification of active compounds from plant sources and traditional remedies, as they exhibit higher therapeutic efficacies and improved toxicological profiles. Among the large diversity of plant extracts that have been discovered and explored for their potential therapeutic benefits, asperuloside, an iridoid glycoside, has been proven to provide promising effects as a therapeutic agent for several diseases. Although, this potent substance exists in several genera, it is primarily found in plants belonging to the genus Eucommia. Recent decades have seen a surge in the research on Asperuloside, making it one of the most studied natural products in the field of medicine and pharmacology. In this review, we have attempted to study the various reported mechanisms of asperuloside that form the basis of its wide spectrum of pharmacological activities.
    MeSH terms: Attention; Biological Products; Glucosides; Plant Extracts; Eucommiaceae; Iridoids; Drug Discovery; Iridoid Glycosides
  12. Sawal Hamid ZB, Rajikan R, Elias SM, Jamil NA
    PMID: 31783474 DOI: 10.3390/ijerph16234720
    Achieving nutritional requirements for pregnant women in rural or suburban households while maintaining the intake of local and culture-specific foods can be difficult. Usage of a linear programming approach can effectively generate diet optimization models that incorporate local and culturally acceptable menus. This study aimed to determine whether a realistic and affordable diet that achieves recommended nutrient intakes for pregnant women could be formulated from locally available foods in Malaysia. A cross-sectional study was conducted to assess the dietary intake of 78 pregnant women using a 24-h dietary recall and a 3-day food record. A market survey was also carried out to estimate the cost of raw foods that are frequently consumed. All linear programming analyses were done using Excel Solver to generate optimal dietary patterns. Our findings showed that the menus designed from diet optimization models using locally available foods would improve dietary adequacy for the seven food groups based on the Malaysian Dietary Guidelines 2010 (MDG 2010) and the 14 nutrients based on Recommended Nutrient Intake 2017 (RNI 2017) in pregnant women. However, inadequacies remained for iron and niacin, indicating that these nutrients may require supplementation.
    MeSH terms: Cross-Sectional Studies; Diet; Female; Humans; Iron; Malaysia; Niacin; Nutritional Requirements; Pregnancy; Programming, Linear; Surveys and Questionnaires; Nutrition Policy; Dietary Supplements; Raw Foods
  13. Noor Hafizah Y, Ang LC, Yap F, Nurul Najwa W, Cheah WL, Ruzita AT, et al.
    PMID: 31783477 DOI: 10.3390/ijerph16234722
    As there are few food frequency questionnaires (FFQ) to assess the dietary intake of preschool children, this study examined the validity and reliability of an FFQ for this purpose. A total of 210 preschoolers aged 4 to 6 years participated in the validation study, while a subsample of 66 participants joined the reliability study. The FFQ is modified from the ToyBox-study and South East Asian Nutrition Surveys (SEANUTS), and comprised 108 food items from 13 food groups. A three-day estimated dietary record (3DR) was used as reference and reliability was assessed through a second administration of the FFQ (FFQ2), four weeks after the first administration (FFQ1). For the validation study, Spearman's correlation coefficients showed moderate to high correlations (p < 0.001) between FFQ and 3DR. Cross-classification of quartile analysis showed moderate agreement between the two methods. As for reliability, Spearman's correlation coefficients showed moderate to high correlations (p < 0.001) between FFQ1 and FFQ2. Cronbach's alpha values (0.708 to 0.824) and intraclass correlation coefficients (0.710 to 0.826) showed good agreement between repeated FFQs. The results suggest that the FFQ has acceptable validity and good reliability. Hence, the FFQ can be used to assess preschool children's food intake.
    MeSH terms: Energy Intake/physiology*; Child Nutritional Physiological Phenomena/physiology*; Child, Preschool; Diet*; Feeding Behavior/physiology*; Female; Humans; Male; Nutrition Surveys; Reproducibility of Results; Nutrition Assessment; Diet Records
  14. Mohamad Fadzil N, Mohammed Z, Mohamad Shahimin M, Saliman NH
    PMID: 31783492 DOI: 10.3390/ijerph16234728
    This study aimed to assess the visual function, reading performance, and compensatory head posture (CHP) in schoolchildren with infantile nystagmus. A total of 18 participants aged between 13 to 18 years old were divided into spectacle (n = 9) and null zone group (n = 9) based on their visual acuity. Visual acuity (LogMAR), contrast sensitivity (Pelli-Robson), reading time and rate (Tobii TX300), and CHP were measured pre and post null zone reading training. Participants in the null zone group received 10 sessions of training (5 weeks). Visual acuity and contrast sensitivity of participants in the spectacle and null zone groups were not significantly different pre and post training. Reading performance, i.e., reading time (z = -1.36; p = 0.173) and reading rate (z = -0.06; p = 0.953), of participants in the spectacle group was not significantly different after 5 weeks. Reading time (z = -2.55; p = 0.011) and reading rate (z = -2.07; p = 0.038 of participants in the null zone group showed significant improvement post training. After 5 weeks, CHP improved in six out of the nine participants (66.7%) of the null zone group and was unchanged in all participants in the spectacle group. Null zone reading training could benefit children with infantile nystagmus in improving reading performance and compensatory head posture.
    MeSH terms: Adolescent; Child; Eyeglasses; Humans; Posture; Reading; Visual Acuity; Contrast Sensitivity; Ocular Motility Disorders; Nystagmus, Congenital
  15. Yahya AN, Sharanjeet-Kaur S, Akhir SM
    PMID: 31783494 DOI: 10.3390/ijerph16234730
    Uncorrected refractive error, especially myopia, in young children can cause permanent visual impairment in later life. However, data on the normative development of refractive error in this age group is limited, especially in Malaysia. The aim of this study was to determine the distribution of refractive error in a sample of infants and young children between the ages of 6 to 36 months in a prospective, cross-sectional study. Cycloplegic retinoscopy was conducted on both eyes of 151 children of mean age 18.09 ± 7.95 months. Mean spherical equivalent refractive error for the right and left eyes was +0.85 ± 0.97D and +0.86 ± 0.98D, respectively. The highest prevalence of refractive error was astigmatism (26%), followed by hyperopia (12.7%), myopia (1.3%) and anisometropia (0.7%). There was a reduction of hyperopic refractive error with increasing age. Myopia was seen to emerge at age 24 months. In conclusion, the prevalence of astigmatism and hyperopia in infants and young children was high, but that of myopia and anisometropia was low. There was a significant reduction in hyperopic refractive error towards emmetropia with increasing age. It is recommended that vision screening be conducted early to correct significant refractive error that may cause disruption to clear vision.
    MeSH terms: Astigmatism; Child; Child, Preschool; Cross-Sectional Studies; Eye; Humans; Hyperopia; Infant; Malaysia; Mydriatics; Myopia; Prospective Studies; Refractive Errors; Vision Screening; Vision, Low; Anisometropia; Prevalence; Retinoscopy; Emmetropia
  16. Jamil NA, Shahudin NN, Abdul Aziz NS, Jia Qi C, Wan Aminuddin WAA, Mat Ludin AF, et al.
    PMID: 31783521 DOI: 10.3390/ijerph16234735
    This study assessed knowledge, attitude and practice (KAP) related to vitamin D and its relationship with vitamin D status among Malay female office workers. A total of 147 women aged between 20 and 55 years were recruited from a university in Kuala Lumpur. They answered questionnaires related to KAP on vitamin D, sun exposure, dietary vitamin D intake and physical activity. Serum 25-hydroxyvitamin D (25OHD) was analysed using an enzyme-linked immunoassay. Nearly half (45%) of the subjects had good knowledge but moderate attitude (76%) and practice (84%) towards sunlight exposure and dietary vitamin D intake. Median serum 25OHD was 34.1 nmol/L with the majority (91%) had vitamin D insufficiency (25OHD < 50 nmol/L). Knowledge was weakly associated with attitude (r = 0.29, p < 0.001) but no association was found between knowledge and practice (r = 0.08, p = 0.355) nor attitude and practice (r = -0.001, p = 0.994). Serum 25OHD was positively associated with sunlight exposure (r = 0.22, p = 0.008) and dietary vitamin D intake (r = 0.37, p < 0.001). It can be implied that this group is at increased risk of low bone health status, which highlights the needs of public health campaigns to improve their vitamin D status.
    MeSH terms: Adult; Calcifediol; Diet; Female; Health Promotion; Health Status; Humans; Immunoassay; Malaysia; Middle Aged; Surveys and Questionnaires; Sunlight; Universities; Vitamin D; Vitamin D Deficiency; Vitamins; Exercise; Young Adult
  17. Al-Saleh MA, Yussuf AA, Al-Enezi S, Kazemi R, Wahit MU, Al-Shammari T, et al.
    Materials (Basel), 2019 Nov 27;12(23).
    PMID: 31783544 DOI: 10.3390/ma12233924
    In this research work, graphene nanoplatelets (GNP) were selected as alternative reinforcing nanofillers to enhance the properties of polypropylene (PP) using different compatibilizers called polypropylene grafted maleic anhydride (PP-g-MA) and ethylene-octene elastomer grafted maleic anhydride (POE-g-MA). A twin screw extruder was used to compound PP, GNP, and either the PP-g-MA or POE-g-MA compatibilizer. The effect of GNP loading on mechanical and thermal properties of neat PP was investigated. Furthermore, the influence and performance of different compatibilizers on the final properties, such as mechanical and thermal, were discussed and reported. Tensile, flexural, impact, melting temperature, crystallization temperature, and thermal stability were evaluated by using a universal testing system, differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). For mechanical properties, it was found that increasing GNP content from 1 wt.% to 5 wt.% increased tensile strength of the neat PP up to 4 MPa. The influence of compatibilizers on the mechanical properties had been discussed and reported. For instance, the addition of PP-g-MA compatibilizer improved tensile strength of neat PP with GNP loading. However, the addition of compatibilizer POE-g-MA slightly decreased the tensile strength of neat PP. A similar trend of behavior was observed for flexural strength. For thermal properties, it was found that both GNP loading and compatibilizers have no significant influence on both crystallization and melting temperature of neat PP. For thermal stability, however, it was found that increasing the GNP loading had a significant influence on improving the thermal behavior of neat PP. Furthermore, the addition of compatibilizers into the PP/GNP nanocomposite had slightly improved the thermal stability of neat PP.
    MeSH terms: Calorimetry, Differential Scanning; Crystallization; Ethylenes; Graphite; Maleic Anhydrides; Polypropylenes; Silicone Elastomers; Temperature; Tensile Strength; Elastomers; Nanocomposites
  18. Mohd Nordin NA, Yusoff NAH, Ajit Singh DK
    PMID: 31783575 DOI: 10.3390/ijerph16234746
    Although exercise is proven as an effective strategy to combat post-stroke complications and the risk of stroke recurrence, many stroke survivors fail to engage in this activity following rehabilitation. In this study, we assessed the feasibility and usefulness of a low-frequency group exercise to determine its suitability as an approach to facilitate exercise engagement among stroke survivors. Forty-one stroke survivors, mean (SD) age 59.34 (10.02) years, mean time post-stroke 17.13 (17.58) months, completed a 90 minute, once per week, group exercise supervised by therapists for 12 weeks. The exercise outcomes were measured using standardized clinical tests. We observed improvement in the group's physical performance; balance score by 3 units (Z = -3.88, p < 0.001), speed of repetitive sit to stand by 3.4 s (Z = -4.69, p < 0.001), and walking speed by 8.22 m/min (Z = -3.25, p < 0.001). Scores of seven out of 14 Berg's balance scale items increased significantly, indicating better balance ability among the survivors. In conclusion, a 12-week, once per week group exercise session seems feasible and sufficient to improve the physical performance of community dwelling stroke survivors. This exercise arrangement may be offered to stroke survivors to facilitate exercise practice following rehabilitation.
    MeSH terms: Aged; Exercise Therapy*; Female; Humans; Male; Middle Aged; Program Evaluation; Survivors*; Qualitative Research; Independent Living
  19. Devaraj NK, Suppiah S, Veettil SK, Ching SM, Lee KW, Menon RK, et al.
    Nutrients, 2019 Nov 27;11(12).
    PMID: 31783578 DOI: 10.3390/nu11122886
    The protective effects of probiotic supplementation against radiation-induced diarrhea (RID) have been reported in previous systematic reviews; however so far, only non-conclusive results have been obtained. The objective of this study was to systematically update and evaluate the available evidence for probiotic supplementation. The protocol of this systematic review has been registered (CRD42018106059) with the International Prospective Register of Systematic Reviews (PROSPERO). The primary efficacy outcome was the incidence of RID. Secondary outcomes were the incidence of watery stool, soft stool, and antidiarrheal medication use. There were eight trials, and a total of 1116 participants were included in the primary analysis. Compared with placebo, probiotics were associated with a lower risk of RID [risk ratio (RR) = 0.62, 95% CI = 0.46, 0.83]. A requisite heterogeneity-adjusted trial sequential analysis indicated conclusive evidence for this beneficial effect. No statistically significant reduction in RID (RR = 0.52, 95% CI = 0.14, 1.91) was observed on subgroup analysis in patients receiving both radiation therapy and chemotherapy. However, those patients receiving only radiation therapy (RT) demonstrated significant benefit (RR = 0.61, 95% CI = 0.48, 0.78). There was a significant difference in the antidiarrheal medication use (RR = 0.54, 95% CI = 0.35, 0.84) observed with the use of probiotics. However, no significant difference was observed for the incidence of soft and watery stool. The use of probiotics is beneficial in preventing RID in patients receiving RT.
    MeSH terms: Adolescent; Adult; Aged; Diarrhea/etiology; Diarrhea/epidemiology*; Diarrhea/prevention & control; Humans; Middle Aged; Neoplasms/radiotherapy*; Placebos; Radiotherapy/adverse effects*; Randomized Controlled Trials as Topic; MEDLINE; Dietary Supplements; Probiotics/administration & dosage*; Young Adult
  20. Farah NM, Saw Yee T, Mohd Rasdi HF
    Int J Environ Res Public Health, 2019 Nov 27;16(23):4750.
    PMID: 31783607 DOI: 10.3390/ijerph16234750
    (1) Background: The Pittsburgh Sleep Quality Index (PSQI) is a useful tool for the assessment of subjective sleep quality in non-clinical and clinical settings. This study aimed to determine sleep quality in a general Malaysian adult population using a validated Malay version of the Pittsburgh sleep quality index (PSQI-M); (2) Methods: The original PSQI was translated into Malay following forward and backward translation guidelines. The final Malay version was administered to a sample of healthy working adults (n = 106; mean age: 35.3 ± 7.6 years) without history of sleep disorders. Reliability and agreement were assessed using Cronbach's alpha, intra-class correlations coefficient (ICC), standard error of measurement (SEM), and Bland-Altman plot. Convergent validity of PSQI-M was examined with the Malay version of Epworth sleepiness scale (ESS-M) using Pearson's correlation coefficient; (3) Results: Overall mean PSQI global score was 5.25 ± 1.85. About 45% of the sample had PSQI global score >5, indicating poor sleep quality. Total sleep duration per night was 5.95 ± 1.05 h, below the recommended amount. Sleep quality seems to be affected by age but not gender. Internal consistency as measured by Cronbach's alpha in the whole sample was 0.74, with test-retest reliability (ICC) of 0.58 and SEM of 1.34. The PSQI test-retest scores indicated that most of the respondents (90%) lay within the 95% limits of agreement. The PSQI-M also showed significant correlation with ESS-M scores (r = 0.37, p < 0.01); (4) Conclusion: The PSQI-M showed acceptable reliability and is valid to be used in a general Malaysian adult population. Findings also indicate that a majority of the adults in our sample were experiencing inadequate sleep, thus further research is needed to identify the factors associated with poor sleep quality.
    Study site and participants: adults working in a university satellite campus in Kuala Lumpur, Malaysia
    MeSH terms: Adult; Humans; Malaysia; Surveys and Questionnaires; Sleep; Sleep Wake Disorders; Translating; Translations; Reproducibility of Results
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