Browse publications by year: 2018

  1. Sivagurunathan P, Kuppam C, Mudhoo A, Saratale GD, Kadier A, Zhen G, et al.
    Crit Rev Biotechnol, 2018 Sep;38(6):868-882.
    PMID: 29264932 DOI: 10.1080/07388551.2017.1416578
    This review provides the alternative routes towards the valorization of dark H2 fermentation effluents that are mainly rich in volatile fatty acids such as acetate and butyrate. Various enhancement and alternative routes such as photo fermentation, anaerobic digestion, utilization of microbial electrochemical systems, and algal system towards the generation of bioenergy and electricity and also for efficient organic matter utilization are highlighted. What is more, various integration schemes and two-stage fermentation for the possible scale up are reviewed. Moreover, recent progress for enhanced performance towards waste stabilization and overall utilization of useful and higher COD present in the organic source into value-added products are extensively discussed.
    MeSH terms: Electricity; Fatty Acids, Volatile; Fermentation; Acetic Acid; Butyric Acid
  2. Kario K, Tomitani N, Buranakitjaroen P, Chen CH, Chia YC, Divinagracia R, et al.
    J Clin Hypertens (Greenwich), 2018 Jan;20(1):33-38.
    PMID: 29265725 DOI: 10.1111/jch.13145
    Home blood pressure (BP) monitoring is endorsed in multiple guidelines as a valuable adjunct to office BP measurements for the diagnosis and management of hypertension. In many countries throughout Asia, physicians are yet to appreciate the significant contribution of BP variability to cardiovascular events. Furthermore, data from Japanese cohort studies have shown that there is a strong association between morning BP surge and cardiovascular events, suggesting that Asians in general may benefit from more effective control of morning BP. We designed the Asia BP@Home study to investigate the distribution of hypertension subtypes, including white-coat hypertension, masked morning hypertension, and well-controlled and uncontrolled hypertension. The study will also investigate the determinants of home BP control status evaluated by the same validated home BP monitoring device and the same standardized method of home BP measurement among 1600 or more medicated patients with hypertension from 12 countries/regions across Asia.
    MeSH terms: Aged; Antihypertensive Agents/therapeutic use*; Asia/epidemiology; Female; Humans; Male; Patient Care Management/organization & administration; Patient Compliance; Prospective Studies; Sphygmomanometers; Quality Improvement
  3. Ab Malik N, Mohamad Yatim S, Hussein N, Mohamad H, McGrath C
    J Clin Nurs, 2018 May;27(9-10):1913-1919.
    PMID: 29266493 DOI: 10.1111/jocn.14241
    AIMS AND OBJECTIVES: To investigate oral health knowledge for stroke care and the clinical practices performed for oral hygiene care in Malaysia.

    BACKGROUND: Oral hygiene care following stroke is important as the mouth can act as a reservoir for opportunistic infections that can lead to aspirational pneumonia.

    DESIGN: A national cross-sectional survey was conducted in Malaysia among public hospitals where specialist stroke rehabilitation care is provided.

    METHODS: All (16) hospitals were invited to participate, and site visits were conducted. A standardised questionnaire was employed to determine nurses' oral health knowledge for stroke care and existing clinical practices for oral hygiene care. Variations in oral health knowledge and clinical practices for oral hygiene care were examined.

    RESULTS: Questionnaires were completed by 806 nurses across 13 hospitals. Oral health knowledge scores varied among the nurses; their mean score was 3.7 (SD 1.1) out of a possible 5.0. Approximately two-thirds (63.6%, n = 513) reported that some form of "mouth cleaning" was performed for stroke patients routinely. However, only a third (38.3%, n = 309) reported to perform or assist with the clinical practice of oral hygiene care daily. Their oral health knowledge of stroke care was associated with clinical practices for oral hygiene care (p 

    MeSH terms: Critical Care/methods; Cross-Sectional Studies; Female; Humans; Hygiene*; Health Knowledge, Attitudes, Practice*; Malaysia; Male; Oral Hygiene/nursing*; Surveys and Questionnaires; Stroke/nursing*; Stroke/therapy; Stroke Rehabilitation/nursing*
  4. Fong JYM, Tan VJH, Lee JR, Tong ZGM, Foong YK, Tan JME, et al.
    Eur J Dent Educ, 2018 Aug;22(3):160-166.
    PMID: 29266663 DOI: 10.1111/eje.12297
    AIM: To evaluate the effectiveness of clinical audit-feedback cycle as an educational tool in improving the technical quality of root canal therapy (RCT) and compliance with record keeping performed by dental undergraduates.

    METHODS: Clinical audit learning was introduced in Year 3 of a 5-year curriculum for dental undergraduates. During classroom activities, students were briefed on clinical audit, selected their audit topics in groups of 5 or 6 students, and prepared and presented their audit protocols. One chosen topic was RCT, in which 3 different cohorts of Year 3 students conducted retrospective audits of patients' records in 2012, 2014 and 2015 for their compliance with recommended record keeping criteria and their performance in RCT. Students were trained by and calibrated against an endodontist (κ ≥ 0.8). After each audit, the findings were reported in class, and recommendations were made for improvement in performance of RCT and record keeping. Students' compliance with published guidelines was presented and their RCT performances in each year were compared using the chi-square test.

    RESULTS: Overall compliance with of record keeping guidelines was 44.1% in 2012, 79.6% in 2014 and 94.6% in 2015 (P = .001). In the 2012 audit, acceptable extension, condensation and the absence of mishap were observed in 72.4, 75.7% and 91.5%; in the 2014 audit, 95.1%, 64.8% and 51.4%; and in 2015 audit, 96.4%, 82.1% and 92.8% of cases, respectively. In 2015, 76.8% of root canal fillings met all 3 technical quality criteria when compared to 48.6% in 2014 and 44.7% in 2012 (P = .001).

    CONCLUSION: Clinical audit-feedback cycle is an effective educational tool for improving dental undergraduates' compliance with record keeping and performance in the technical quality of RCT.

    MeSH terms: Formative Feedback*; Clinical Competence/standards*; Compliance*; Curriculum*; Education, Dental/methods*; Endodontics/education; Humans; Root Canal Therapy/standards*; Students, Dental/psychology*; Dental Audit*
  5. Hariri F, Abdul Rahman ZA, Bahuri NFA, Azmi MN, Abdullah NA, Ganesan D
    J Oral Maxillofac Surg, 2018 03;76(3):646.e1-646.e12.
    PMID: 29268076 DOI: 10.1016/j.joms.2017.11.029
    Crouzon syndrome (CS) is the most common craniosynostosis syndrome and requires a comprehensive management strategy for the optimization of care and functional rehabilitation. This report presents a case series of 6 pediatric patients diagnosed with CS who were treated with distraction osteogenesis (DO) to treat serious functional issues involving severe orbital proptosis, an obstructed nasopharyngeal airway, and increased intracranial pressure (ICP). Three boy and 3 girls were 8 months to 6 years old at the time of the operation. The mean skeletal advancement was 16.1 mm (range, 10 to 27 mm) with a mean follow-up of 31.7 months (range, 13 to 48 months). Reasonable and successful outcomes were achieved in most patients as evidenced by adequate eye protection, absence of signs and symptoms of increased ICP, and tracheostomy tube decannulation except in 1 patient. Complications were difficult fixation of external stabilizing pins in the distraction device (n = 1) and related to surgery (n = 4). Although DO can be considered very technical and can have potentially serious complications, the technique produces favorable functional and clinical outcomes in treating severe CS.
    MeSH terms: Bone Nails; Child; Craniofacial Dysostosis; Craniosynostoses; Exophthalmos; Female; Follow-Up Studies; Humans; Intracranial Pressure; Male; Tracheostomy; Osteogenesis, Distraction
  6. Zuo H, Ueland PM, Midttun Ø, Vollset SE, Tell GS, Theofylaktopoulou D, et al.
    Cancer Res, 2018 Jan 01;78(1):302-308.
    PMID: 29070616 DOI: 10.1158/0008-5472.CAN-17-1923
    Circulating pyridoxal-5'-phosphate (PLP) has been linked to lung cancer risk. The PAr index, defined as the ratio 4-pyridoxic acid/(pyridoxal + PLP), reflects increased vitamin B6 catabolism during inflammation. PAr has been defined as a marker of lung cancer risk in a prospective cohort study, but analysis of a larger numbers of cases are needed to deepen the significance of this study. Here, we conducted a nested case-control study within the European Prospective Investigation into Cancer and Nutrition (EPIC, n = 521,330), which included 892 incident lung cancer cases and 1,748 controls matched by center, gender, date of blood collection, and date of birth. The association of PAr with risk of lung cancer was evaluated by using conditional logistic regression. Study participants with elevated PAr experienced higher risk of lung cancer in a dose-response fashion, with a doubling in PAr levels associated with 52% higher odds of lung cancer after adjustment for tobacco smoking, serum cotinine levels, educational attainment, and BMI [OR, 1.52; 95% confidence interval (CI) 1.27-1.81; P < 0.001]. Additional adjustment for intake of vegetables and fruits and physical activity did not materially affect risk association. The association of PAr with lung cancer risk was similar in both genders but slightly stronger in former smokers and in participants diagnosed with squamous cell carcinoma. This study provides robust evidence that increased vitamin B6 catabolism is independently associated with a higher risk of future lung cancer.Significance: This large cohort study firmly establishes an association between an index of vitamin B6 levels with lung cancer risk. Cancer Res; 78(1); 302-8. ©2017 AACR.
    MeSH terms: Adult; Aged; Europe; Female; Humans; Lung Neoplasms/etiology*; Male; Middle Aged; Prospective Studies; Pyridoxal Phosphate/metabolism; Pyridoxic Acid/metabolism; Risk Factors; Case-Control Studies; Vitamin B 6/blood; Vitamin B 6/metabolism*
  7. Shen G, Huang Y, Dong J, Wang X, Cheng KK, Feng J, et al.
    J Agric Food Chem, 2018 Jan 10;66(1):368-377.
    PMID: 29215281 DOI: 10.1021/acs.jafc.7b03182
    Taurine is indispensable in aquatic diets that are based solely on plant protein, and it promotes growth of many fish species. However, the physiological and metabolome effects of taurine on fish have not been well described. In this study, 1H NMR-based metabolomics approaches were applied to investigate the metabolite variations in Nile tilapia (Oreochromis nilotictus) muscle in order to visualize the metabolic trajectory and reveal the possible mechanisms of metabolic effects of dietary taurine supplementation on tilapia growth. After extraction using aqueous and organic solvents, 19 taurine-induced metabolic changes were evaluated in our study. The metabolic changes were characterized by differences in carbohydrate, amino acid, lipid, and nucleotide contents. The results indicate that taurine supplementation could significantly regulate the physiological state of fish and promote growth and development. These results provide a basis for understanding the mechanism of dietary taurine supplementation in fish feeding. 1H NMR spectroscopy, coupled with multivariate pattern recognition technologies, is an efficient and useful tool to map the fish metabolome and identify metabolic responses to different dietary nutrients in aquaculture.
    MeSH terms: Animals; Animal Feed/analysis; Magnetic Resonance Spectroscopy/methods*; Taurine/metabolism*; Muscle, Skeletal/metabolism; Muscle, Skeletal/chemistry; Dietary Supplements/analysis; Cichlids/growth & development; Cichlids/metabolism*; Fish Proteins/metabolism; Fish Proteins/chemistry; Metabolomics/methods*
  8. Benavente ED, de Sessions PF, Moon RW, Grainger M, Holder AA, Blackman MJ, et al.
    Int J Parasitol, 2018 03;48(3-4):191-196.
    PMID: 29258833 DOI: 10.1016/j.ijpara.2017.09.008
    Plasmodium knowlesi, a common parasite of macaques, is recognised as a significant cause of human malaria in Malaysia. The P. knowlesi A1H1 line has been adapted to continuous culture in human erythrocytes, successfully providing an in vitro model to study the parasite. We have assembled a reference genome for the PkA1-H.1 line using PacBio long read combined with Illumina short read sequence data. Compared with the H-strain reference, the new reference has improved genome coverage and a novel description of methylation sites. The PkA1-H.1 reference will enhance the capabilities of the in vitro model to improve the understanding of P. knowlesi infection in humans.
    MeSH terms: Erythrocytes/parasitology; Humans; Malaria/epidemiology; Malaria/parasitology*; Malaria/prevention & control; Malaysia/epidemiology; DNA, Protozoan/isolation & purification; DNA, Protozoan/metabolism; DNA, Protozoan/chemistry; Plasmodium knowlesi/genetics*; Genome, Protozoan*; DNA Methylation
  9. Choy KW, Lau YS, Murugan D, Vanhoutte PM, Mustafa MR
    J. Pharmacol. Exp. Ther., 2018 03;364(3):420-432.
    PMID: 29259041 DOI: 10.1124/jpet.117.245217
    Inflammatory injury of the endothelium leads to apoptosis and endothelial dysfunction. The current study explored the effect and mechanisms of paeonol in inflammation-induced apoptosis and endothelial dysfunction induced by lipopolysaccharides (LPSs). The effects of paeonol on LPS-induced inflammatory injury were assessed by Western blotting, flow cytometry and reactive oxygen species (ROS) measurement in human umbilical vein endothelial cells (HUVECs) and C57BL/6J mice. Vascular reactivity of isolated mouse aortae was examined using wire myographs. The exposure of HUVECs to LPS increased the protein presence of Toll-like receptor 4 (TLR4), bone morphogenic protein 4 (BMP4), BMP receptor type 1A, nicotinamide adenine dinucleotide phosphate oxidase subunit 2, mitogen-activated protein kinase (MAPK), inducible nitric oxide synthase (iNOS), and cleaved caspase 3, as well as decreased it in phosphorylated endothelial nitric oxide synthase; these effects were prevented by treatment with paeonol. Similarly, cotreatment with paeonol reversed BMP4-induced apoptosis in HUVECs. Relaxation in response to the endothelium-dependent vasodilator acetylcholine were impaired in mouse aortae after exposure to LPSs; this endothelial dysfunction was reversed by cotreatment with paeonol, noggin (a BMP4 inhibitor), TAK242 (TLR4 antagonist), apocynin (an ROS scavenger), MAPK inhibitors, and AG (an iNOS inhibitor). BMP4 small interfering RNAs (siRNAs) abolished LPS-induced upregulation of BMP4 and cleaved caspase 3 protein, but not in cells treated with TLR4 siRNA and vice versa. The silencing of TLR4 and BMP4 abolished the inhibitory effects of paeonol on LPS-induced activation of cleaved caspase 3. The present results demonstrate that paeonol reduces LPS-induced endothelial dysfunction and apoptosis by inhibiting TLR4 and BMP4 signaling independently.
    MeSH terms: Acetophenones/pharmacology*; Humans; Lipopolysaccharides/pharmacology*; Signal Transduction/drug effects*; Apoptosis/drug effects*; Reactive Oxygen Species/metabolism; Toll-Like Receptor 4/metabolism*; Bone Morphogenetic Protein 4/metabolism*; Human Umbilical Vein Endothelial Cells/drug effects*; Human Umbilical Vein Endothelial Cells/metabolism; Human Umbilical Vein Endothelial Cells/pathology
  10. Karamba KI, Ahmad SA, Zulkharnain A, Yasid NA, Ibrahim S, Shukor MY
    3 Biotech, 2018 Jan;8(1):11.
    PMID: 29259886 DOI: 10.1007/s13205-017-1025-x
    The evaluation of degradation and growth kinetics of Serratia marcescens strain AQ07 was carried out using three half-order models at all the initial concentrations of cyanide with the values of regression exceeding 0.97. The presence of varying cyanide concentrations reveals that the growth and degradation of bacteria were affected by the increase in cyanide concentration with a total halt at 700 ppm KCN after 72 h incubation. In this study, specific growth and degradation rates were found to trail the substrate inhibition kinetics. These two rates fitted well to the kinetic models of Teissier, Luong, Aiba and Heldane, while the performance of Monod model was found to be unsatisfactory. These models were used to clarify the substrate inhibition on the bacteria growth. The analyses of these models have shown that Luong model has fitted the experimental data with the highest coefficient of determination (R2) value of 0.9794 and 0.9582 with the lowest root mean square error (RMSE) value of 0.000204 and 0.001, respectively, for the specific rate of degradation and growth. It is the only model that illustrates the maximum substrate concentration (Sm) of 713.4 and empirical constant (n) of 1.516. Tessier and Aiba fitted the experimental data with a R2 value of 0.8002 and 0.7661 with low RMSE of 0.0006, respectively, for specific biodegradation rate, while having a R2 value of 0.9 and RMSE of 0.001, respectively, for specific growth rate. Haldane has the lowest R2 value of 0.67 and 0.78 for specific biodegradation and growth rate with RMSE of 0.0006 and 0.002, respectively. This indicates the level of the bacteria stability in varying concentrations of cyanide and the maximum cyanide concentration it can tolerate within a specific time period. The biokinetic constant predicted from this model demonstrates a good ability of the locally isolated bacteria in cyanide remediation in industrial effluents.
    MeSH terms: Biodegradation, Environmental; Cyanides; Kinetics; Serratia marcescens
  11. Mohamad Nasir NF, Zainuddin A, Shamsuddin S
    J Mol Neurosci, 2018 Feb;64(2):157-161.
    PMID: 29260452 DOI: 10.1007/s12031-017-1005-y
    Alzheimer's disease (AD) is a neurodegenerative disease that is imposing an increasing burden on society. Currently, AD is the leading cause of senile dementia worldwide. Despite the long existence of AD, there is lack of therapies for AD, suggesting that new and effective treatment strategy must be explored. At present, sirtuin pathway has attracted attention from the researchers due to its promising results in laboratory models of aging. In addition, our understanding in the roles of sirtuin 6 in AD has expanded. It has been identified to be involved in telomere maintenance, DNA repair, genome integrity, energy metabolism, and inflammation, which ultimately regulate life span. Recent findings also demonstrate that sirtuin 6 is lacking in AD patients, proposing that it can be a new potential therapeutic target in AD. Therefore, exploring on how sirtuin 6 is related in AD manifestation may accelerate the research of AD further and benefits future AD patients. Keeping that in mind, this review aims to highlight the possible roles of sirtuin 6 in AD manifestation.
    MeSH terms: Aging/genetics; Aging/metabolism*; Alzheimer Disease/genetics; Alzheimer Disease/metabolism*; Animals; Humans; Sirtuins/genetics; Sirtuins/metabolism*
  12. Lai MY, Ooi CH, Lau YL
    Am J Trop Med Hyg, 2018 03;98(3):700-703.
    PMID: 29260656 DOI: 10.4269/ajtmh.17-0738
    The aim of this study was to develop a recombinase polymerase amplification (RPA) combined with a lateral flow (LF) strip method for specific diagnosis of Plasmodium knowlesi. With incubation at 37°C, the 18S rRNA gene of P. knowlesi was successfully amplified within 12 minutes. By adding a specifically designed probe to the reaction solution, the amplified RPA product can be visualized on a LF strip. The RPA assay exhibited high sensitivity with limits of detection down to 10 parasites/μL of P. knowlesi. Nonetheless, it was demonstrated that all P. knowlesi (N = 41) and other Plasmodium sp. (N = 25) were positive while negative samples (N = 8) were negative. Therefore, a combination of RPA and LF strip detection is a highly promising approach with the potential to be suitable for use in resource-limited settings.
    MeSH terms: Reagent Strips*; Sensitivity and Specificity; Plasmodium knowlesi/genetics; Plasmodium knowlesi/isolation & purification*; Nucleic Acid Amplification Techniques/methods*; Recombinases/genetics*
  13. Chew KH, Kuwahara R, Ohno K
    Phys Chem Chem Phys, 2018 Jan 17;20(3):1653-1663.
    PMID: 29261192 DOI: 10.1039/c7cp04022a
    The corrosion of iron presents an important scientific problem and a serious economic issue. It is also one of the most important subjects in materials science because it is basically an electrochemical process and closely related to other topics such as the electrocatalysis of the oxygen reduction reaction. So far, many studies have been conducted to address the corrosion of iron, a very complicated process that occurs when iron is exposed to oxygen and water. An important question is, at which site of the iron surface the corrosion starts and how it results in the final stage of the corrosion. In the present study, as an example of superficial defects, Fe dimers sticking out of Fe(100) surfaces are considered in order to understand the iron corrosion process from first-principles using density functional theory. We found that the Fe dimers spontaneously react with O2 and H2O to form Fe2(OH)4 + 4OH-. Here, it is interesting to note that the Fe dimer plays the role of a water splitting catalyst, because the space above it is always vacant and can accept oxygen molecules many times for reacting with the surrounding water molecules. Then, if the Fe2(OH)4 molecules are detached from the surface, they react with O2 to form Fe2O(OH)4 without an activation barrier, and, in turn, the Fe2O(OH)4 and H2O molecules react to form Fe2(OH)6 complexes with an activation energy of 0.653 eV. If these complexes further dissociate into Fe(OH)3 molecules, they react with each other to form Fe2O3·2H2O with an activation energy of 0.377 eV. This work may provide useful information on possible iron corrosion processes by water in the air.
  14. Chan BT, Yeoh HK, Liew YM, Dokos S, Al Abed A, Chee KH, et al.
    Coron Artery Dis, 2018 06;29(4):316-324.
    PMID: 29261521 DOI: 10.1097/MCA.0000000000000596
    OBJECTIVE: This study investigated the intraventricular flow dynamics in ischaemic heart disease patients.

    PATIENTS AND METHODS: Fourteen patients with normal ejection fraction and 16 patients with reduced ejection fraction were compared with 20 healthy individuals. Phase-contrast MRI was used to assess intraventricular flow variables and speckle-tracking echocardiography to assess myocardial strain and left ventricular (LV) dyssynchrony. Infarct size was acquired using delayed-enhancement MRI.

    RESULTS: The results obtained showed no significant differences in intraventricular flow variables between the healthy group and the patients with normal ejection fraction group, whereas considerable reductions in kinetic energy (KE) fluctuation index, E' (P<0.001) and vortex KE (P=0.003) were found in the patients with reduced ejection fraction group. In multivariate analysis, only vortex KE and infarct size were significantly related to LV ejection fraction (P<0.001); furthermore, vortex KE was correlated negatively with energy dissipation, energy dissipation index (r=-0.44, P=0.021).

    CONCLUSION: This study highlights that flow energetic indices have limited applicability as early predictors of LV progressive dysfunction, whereas vortex KE could be an alternative to LV performance.

    MeSH terms: Adult; Aged; Echocardiography; Female; Hemodynamics*; Humans; Magnetic Resonance Imaging; Male; Middle Aged; Stroke Volume*; Case-Control Studies; Myocardial Ischemia/physiopathology*; Magnetic Resonance Imaging, Cine; ST Elevation Myocardial Infarction/physiopathology*; ST Elevation Myocardial Infarction/diagnostic imaging
  15. Sreeramareddy CT, Harper S, Ernstsen L
    Tob Control, 2018 01;27(1):26-34.
    PMID: 27885168 DOI: 10.1136/tobaccocontrol-2016-053266
    BACKGROUND: Socioeconomic differentials of tobacco smoking in high-income countries are well described. However, studies to support health policies and place monitoring systems to tackle socioeconomic inequalities in smoking and smokeless tobacco use common in low-and-middle-income countries (LMICs) are seldom reported. We aimed to describe, sex-wise, educational and wealth-related inequalities in tobacco use in LMICs.

    METHODS: We analysed Demographic and Health Survey data on tobacco use collected from large nationally representative samples of men and women in 54 LMICs. We estimated the weighted prevalence of any current tobacco use (including smokeless tobacco) in each country for 4 educational groups and 4 wealth groups. We calculated absolute and relative measures of inequality, that is, the slope index of inequality (SII) and relative index of inequality (RII), which take into account the distribution of prevalence across all education and wealth groups and account for population size. We also calculated the aggregate SII and RII for low-income (LIC), lower-middle-income (lMIC) and upper-middle-income (uMIC) countries as per World Bank classification.

    FINDINGS: Male tobacco use was highest in Bangladesh (70.3%) and lowest in Sao Tome (7.4%), whereas female tobacco use was highest in Madagascar (21%) and lowest in Tajikistan (0.22%). Among men, educational inequalities varied widely between countries, but aggregate RII and SII showed an inverse trend by country wealth groups. RII was 3.61 (95% CI 2.83 to 4.61) in LICs, 1.99 (95% CI 1.66 to 2.38) in lMIC and 1.82 (95% CI 1.24 to 2.67) in uMIC. Wealth inequalities among men varied less between countries, but RII and SII showed an inverse pattern where RII was 2.43 (95% CI 2.05 to 2.88) in LICs, 1.84 (95% CI 1.54 to 2.21) in lMICs and 1.67 (95% CI 1.15 to 2.42) in uMICs. For educational inequalities among women, the RII varied much more than SII varied between the countries, and the aggregate RII was 14.49 (95% CI 8.87 to 23.68) in LICs, 3.05 (95% CI 1.44 to 6.47) in lMIC and 1.58 (95% CI 0.33 to 7.56) in uMIC. Wealth inequalities among women showed a pattern similar to that of men: the RII was 5.88 (95% CI 3.91 to 8.85) in LICs, 1.76 (95% CI 0.80 to 3.85) in lMIC and 0.39 (95% CI 0.09 to 1.64) in uMIC. In contrast to men, among women, the SII was pro-rich (higher smoking among the more advantaged) in 13 of the 52 countries (7 of 23 lMIC and 5 of 7 uMIC).

    INTERPRETATION: Our results confirm that socioeconomic inequalities tobacco use exist in LMIC, varied widely between the countries and were much wider in the lowest income countries. These findings are important for better understanding and tackling of socioeconomic inequalities in health in LMIC.

    MeSH terms: Developing Countries; Educational Status; Female; Health Policy*; Health Surveys; Humans; Male; Poverty; Sex Factors; Smoking/economics; Smoking/epidemiology*; Socioeconomic Factors; Tobacco, Smokeless/economics; Tobacco, Smokeless/statistics & numerical data*; Prevalence; Developed Countries; Tobacco Use/economics; Tobacco Use/epidemiology*
  16. Wahab NFAC, Kannan TP, Mahmood Z, Rahman IA, Ismail H
    Toxicol In Vitro, 2018 Mar;47:207-212.
    PMID: 29247761 DOI: 10.1016/j.tiv.2017.12.002
    Biphasic Calcium Phosphate (BCP) with a ratio of 20/80 Hydroxyapatite (HA)/Beta-tricalcium phosphate (β-TCP) promotes the differentiation of human dental pulp cells (HDPCs). In the current study, the genotoxicity of locally produced BCP of modified porosity (65%) with a mean pore size of 300micrometer (μm) was assessed using Comet and Ames assays. HDPCs were treated with BCP extract at three different inhibitory concentrations which were obtained based on cytotoxicity test conducted with concurrent negative and positive controls. The tail moment of HDPCs treated with BCP extract at all three concentrations showed no significant difference compared to negative control (p>0.05), indicating that BCP did not induce DNA damage to HDPCs. The BCP was evaluated using five tester strains of Salmonella typhimurium TA98, TA100, TA102, TA1537 and TA1538. Each strain was incubated with BCP extract with five different concentrations in the presence and absence of metabolic activation system (S9) mix. Concurrently, negative and positive controls were included. The average number of revertant colonies per plate treated with the BCP extract was less than double as compared to the number of revertant colonies in negative control plate and no dose-related increase was observed. Results from both assays suggested that the BCP of modified porosity did not exhibit any genotoxic effect under the present test conditions.
    MeSH terms: Adolescent; Cell Line, Transformed; Cell Survival/drug effects; Dental Pulp/cytology; Dental Pulp/drug effects*; DNA Damage; Humans; Hydroxyapatites/adverse effects*; Hydroxyapatites/metabolism; Hydroxyapatites/chemistry; Malaysia; Male; Microscopy, Fluorescence; Microsomes/enzymology; Mutagenicity Tests; Salmonella typhimurium/drug effects; Salmonella typhimurium/genetics; Dental Implants/adverse effects*; Porosity; Comet Assay; Activation, Metabolic
  17. Ilyas RA, Sapuan SM, Ishak MR
    Carbohydr Polym, 2018 Feb 01;181:1038-1051.
    PMID: 29253930 DOI: 10.1016/j.carbpol.2017.11.045
    Cellulose was extracted from sugar palm fibres (Arenga pinnata) by conducting delignification and mercerization treatments. Subsequently, sugar palm nanocrystalline celluloses (SPNCCs) were isolated from the extracted cellulose with 60wt% concentrated sulphuric acid. The chemical composition of sugar palm fibres were determined at different stages of treatment. Structural analysis was carried out by Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). Morphological analysis of extracted cellulose and isolated nanocrystalline cellulose (NCCs) was investigated by using field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), and transmission electron microscopy (TEM). The thermal stability of sugar palm fibres at different stages of treatment was investigated by thermogravimetric analysis (TGA). The results showed that lignin and hemicellulose were removed from the extracted cellulose through the delignification and mercerization process, respectively. The isolated SPNCCs were found to have length and diameters of 130±30nm and 9±1.96nm, respectively.
  18. Khan AS, Man Z, Bustam MA, Nasrullah A, Ullah Z, Sarwono A, et al.
    Carbohydr Polym, 2018 Feb 01;181:208-214.
    PMID: 29253965 DOI: 10.1016/j.carbpol.2017.10.064
    In the present research work, dicationic ionic liquids, containing 1,4-bis(3-methylimidazolium-1-yl) butane ([C4(Mim)2]) cation with counter anions [(2HSO4)(H2SO4)0], [(2HSO4)(H2SO4)2] and [(2HSO4)(H2SO4)4] were synthesised. ILs structures were confirmed using 1H NMR spectroscopy. Thermal stability, Hammett acidity, density and viscosity of ILs were determined. Various types of lignocellulosic biomass such as rubber wood, palm oil frond, bamboo and rice husk were converted into levulinic acid (LA). Among the synthesized ionic liquids, [C4(Mim)2][(2HSO4)(H2SO4)4] showed higher % yield of LA up to 47.52 from bamboo biomass at 110°C for 60min, which is the better yield at low temperature and short time compared to previous reports. Surface morphology, surface functional groups and thermal stability of bamboo before and after conversion into LA were studied using SEM, FTIR and TGA analysis, respectively. This one-pot production of LA from agro-waste will open new opportunity for the conversion of sustainable biomass resources into valuable chemicals.
    MeSH terms: Acids/pharmacology*; Catalysis; Levulinic Acids/metabolism*; Lignin/metabolism*; Temperature; Time Factors; Viscosity; Spectroscopy, Fourier Transform Infrared; Biomass*; Bambusa/chemistry; Ionic Liquids/pharmacology*
  19. Manimaran P, Senthamaraikannan P, Sanjay MR, Marichelvam MK, Jawaid M
    Carbohydr Polym, 2018 Feb 01;181:650-658.
    PMID: 29254019 DOI: 10.1016/j.carbpol.2017.11.099
    The exploration of new natural fibers in the field of polymer composites can contribute to increase the invention of natural reinforcements and expand their use in possible applications. In the present work, the physico-chemical, thermal, tensile and morphological properties of Furcraea foetida (FF) fiber are presented for the first time. Chemical analysis results shows that FF has relatively higher cellulose (68.35%) with lower hemicelluloses (11.46%) and lignin (12.32%). Structural analysis of FF was conducted by Fourier transform infrared and13C (CP-MAS) nuclear magnetic resonance spectroscopy. X-ray diffraction (XRD) analysis evidenced that FF has crystallinity index of 52.6% with crystalline size of 28.36nmThe surface morphology of FF was investigated by scanning electron microscopy (SEM), energy dispersive X-ray micro analyzer (EDX) and atomic force microscopy (AFM). The thermogravimetric analysis (TGA) reveals thermal constancy of the fiber upto 320.5°C with the kinetic activation energy of 66.64kJ/mol, which can be used as reinforcements in thermoplastic green composite whose working temperatures is below 300°C. The FF results were compared with those of other natural fibers, and indicated as a suitable alternative source for composite manufacture.
  20. Teo CH, Ling CJ, Ng CJ
    Am J Prev Med, 2018 Jan;54(1):133-143.
    PMID: 29254551 DOI: 10.1016/j.amepre.2017.08.028
    CONTEXT: Globally, uptake of health screening in men remains low and the effectiveness of interventions to promote screening uptake in men is not well established. This review aimed to determine the effectiveness of interventions in improving men's uptake of and intention to undergo screening, including interventions using information and communication technology and a male-sensitive approach.

    EVIDENCE ACQUISITION: Studies were sourced from five electronic databases (October 2015), experts, and references of included studies. This study included RCTs or cluster RCTs that recruited men and reported uptake of or intention to undergo screening. Two researchers independently performed study selection, appraisal, and data extraction. The interventions were grouped into those that increase uptake and those that promote informed decision making. They were further sub-analyzed according to types of intervention, male-sensitive, and web- and video-based interventions. The analysis was completed in December 2016.

    EVIDENCE SYNTHESIS: This review included 58 studies. Most studies were on prostate cancer (k=31) and HIV (k=11) screening. Most of the studies had low methodologic quality (79.3%) and after excluding them from the analysis, one study found that educational intervention (which was also male-sensitive) was effective in improving men's intention to screen (risk ratio=1.36, 95% CI=1.23, 1.50, k=1) and partner educational intervention increased men's screening uptake (risk ratio=1.77, 95% CI=1.48, 2.12, k=1). Video-based educational interventions reduced prostate cancer screening uptake (risk ratio=0.89, 95%CI=0.80, 0.99, k=1) but web-based interventions did not change men's screening intention or uptake.

    CONCLUSIONS: This review highlights the need to conduct more robust studies to provide conclusive evidence on the effectiveness of different interventions to improve men's screening behavior.
    MeSH terms: Decision Making*; Humans; Male; Prostatic Neoplasms/diagnosis*; Risk; Intention*; Early Detection of Cancer/methods*
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