Browse publications by year: 2018

  1. Sayad A, Ibrahim F, Mukim Uddin S, Cho J, Madou M, Thong KL
    Biosens Bioelectron, 2018 Feb 15;100:96-104.
    PMID: 28869845 DOI: 10.1016/j.bios.2017.08.060
    Outbreaks of foodborne diseases have become a global health concern; hence, many improvements and developments have been made to reduce the risk of food contamination. We developed a centrifugal microfluidic automatic wireless endpoint detection system integrated with loop mediated isothermal amplification (LAMP) for monoplex pathogen detection. Six identical sets were designed on the microfluidic compact disc (CD) to perform 30 genetic analyses of three different species of foodborne pathogens. The consecutive loading, mixing, and aliquoting of the LAMP primers/reagents and DNA sample solutions were accomplished using an optimized square-wave microchannel, metering chambers and revulsion per minute (RPM) control. We tested 24 strains of pathogenic bacteria (Escherichia coli, Salmonella spp and Vibrio cholerae), with 8 strains of each bacterium, and performed DNA amplification on the microfluidic CD for 60min. Then, the amplicons of the LAMP reaction were detected using the calcein colorimetric method and further analysed via the developed electronic system interfaced with Bluetooth wireless technology to transmit the results to a smartphone. The system showed a limit of detection (LOD) of 3 × 10-5ngμL-1 DNA by analysing the colour change when tested with chicken meat spiked with the three pathogenic bacteria. Since the entire process was performed in a fully automated way and was easy to use, our microdevice is suitable for point-of-care (POC) testing with high simplicity, providing affordability and accessibility even to poor, resource-limited settings.
    MeSH terms: Colorimetry/economics; Colorimetry/instrumentation*; DNA, Bacterial/genetics; DNA, Bacterial/isolation & purification; Equipment Design; Escherichia coli/genetics; Escherichia coli/isolation & purification*; Food Microbiology; Foodborne Diseases/microbiology*; Salmonella/genetics; Salmonella/isolation & purification*; Vibrio cholerae/genetics; Vibrio cholerae/isolation & purification*; Biosensing Techniques/economics; Biosensing Techniques/instrumentation; Nucleic Acid Amplification Techniques/economics; Nucleic Acid Amplification Techniques/instrumentation*; Microfluidic Analytical Techniques/economics; Microfluidic Analytical Techniques/instrumentation*; Lab-On-A-Chip Devices; Limit of Detection
  2. Toh TH, Tan VW, Lau PS, Kiyu A
    J Autism Dev Disord, 2018 01;48(1):28-35.
    PMID: 28866856 DOI: 10.1007/s10803-017-3287-x
    This study determined the accuracy of Modified Checklist for Autism in Toddlers (M-CHAT) in detecting toddlers with autism spectrum disorder (ASD) and other developmental disorders (DD) in community mother and child health clinics. We analysed 19,297 eligible toddlers (15-36 months) who had M-CHAT performed in 2006-2011. Overall sensitivities for detecting ASD and all DD were poor but better in the 21 to <27 months and 27-36-month age cohorts (54.5-64.3%). Although positive predictive value (PPV) was poor for ASD, especially the younger cohort, positive M-CHAT helped in detecting all DD (PPV = 81.6%). This suggested M-CHAT for screening ASD was accurate for older cohorts (>21 months) and a useful screening tool for all DD.
    MeSH terms: Autism Spectrum Disorder/diagnosis*; Autism Spectrum Disorder/epidemiology; Autism Spectrum Disorder/psychology; Ambulatory Care Facilities; Developmental Disabilities/diagnosis*; Developmental Disabilities/epidemiology; Developmental Disabilities/psychology; Child, Preschool; Community Health Centers/standards*; Female; Humans; Infant; Malaysia/epidemiology; Male; Mass Screening/methods; Mass Screening/standards*; Maternal-Child Health Centers; Retrospective Studies; Cohort Studies; Checklist/methods; Checklist/standards*
  3. Eng QY, Thanikachalam PV, Ramamurthy S
    J Ethnopharmacol, 2018 Jan 10;210:296-310.
    PMID: 28864169 DOI: 10.1016/j.jep.2017.08.035
    ETHNOPHARMACOLOGICAL RELEVANCE: The compound epigallocatechin-3-gallate (EGCG), the major polyphenolic compound present in green tea [Camellia sinensis (Theaceae], has shown numerous cardiovascular health promoting activity through modulating various pathways. However, molecular understanding of the cardiovascular protective role of EGCG has not been reported.

    AIM OF THE REVIEW: This review aims to compile the preclinical and clinical studies that had been done on EGCG to investigate its protective effect on cardiovascular and metabolic diseases in order to provide a systematic guidance for future research.

    MATERIALS AND METHODS: Research papers related to EGCG were obtained from the major scientific databases, for example, Science direct, PubMed, NCBI, Springer and Google scholar, from 1995 to 2017.

    RESULTS: EGCG was found to exhibit a wide range of therapeutic properties including anti-atherosclerosis, anti-cardiac hypertrophy, anti-myocardial infarction, anti-diabetes, anti-inflammatory and antioxidant. These therapeutic effects are mainly associated with the inhibition of LDL cholesterol (anti-atherosclerosis), inhibition of NF-κB (anti-cardiac hypertrophy), inhibition of MPO activity (anti-myocardial infarction), reduction in plasma glucose and glycated haemoglobin level (anti-diabetes), reduction of inflammatory markers (anti-inflammatory) and the inhibition of ROS generation (antioxidant).

    CONCLUSION: EGCG shows different biological activities and in this review, a compilation of how this bioactive molecule plays its role in treating cardiovascular and metabolic diseases was discussed.

    MeSH terms: Animals; Anti-Inflammatory Agents/isolation & purification; Anti-Inflammatory Agents/pharmacology; Cardiovascular Agents/isolation & purification; Cardiovascular Agents/pharmacology; Cardiovascular Diseases/drug therapy*; Cardiovascular Diseases/physiopathology; Catechin/analogs & derivatives*; Catechin/isolation & purification; Catechin/pharmacology; Humans; Metabolic Diseases/drug therapy*; Metabolic Diseases/physiopathology; Tea/chemistry; Camellia sinensis/chemistry
  4. Yaghoobzadeh A, Sharif Nia H, Pahlevan Sharif S, Hosseinigolafshani SZ, Mohammadi F, Oveisi S, et al.
    Int J Aging Hum Dev, 2018 Jul;87(1):77-89.
    PMID: 28859489 DOI: 10.1177/0091415017727211
    Self-perception is found to be a central predictive factor in experiencing successful aging. The aim of this study was to explore the role of sex, socioeconomic status, and emotional support in elders' aging perception. A cross-sectional design was used with 300 older aged participants recruited from 23 clinics and health centers in Qazvin, Iran. Data were collected included questions to elicit demographic information and Barker's aging perception questionnaire. Exploratory multiple linear regression showed that the level of emotional support (β: -12.10; 95% CI: [-20.72, -3.48]), socioeconomic status (β: 2.84; 95% CI: [0.25, 5.43]), and women (β: -4.34; 95% CI: [-6.91, -1.77]) were associated with aging perception among elders. Educational level and marital status did not significantly contribute to the variance of AP. Findings revealed that aging perception was related to individual differences as well as social and emotional factors. Researchers, health-care professionals, and elders may benefit from thinking about old age as an inevitable life stage.
    MeSH terms: Aging*; Ambulatory Care Facilities; Cross-Sectional Studies; Humans; Iran
  5. Chen YW, Lee HV
    Int J Biol Macromol, 2018 Feb;107(Pt A):78-92.
    PMID: 28860064 DOI: 10.1016/j.ijbiomac.2017.08.143
    In the present work, four types of newly chosen municipal solid wastes (Panax ginseng, spent tea residue, waste cotton cloth, and old corrugated cardboard) were studied as the promising sources for nanocellulose, which has efficiently re-engineered the structure of waste products into highly valuable nanocellulose materials. The nanocellulose was produced directly via a facile one-pot oxidative hydrolysis process by using H2O2/Cr(NO3)3 solution as the bleaching agent and hydrolysis medium under acidic condition. The isolated nanocellulose products were well-characterized in terms of chemical composition, product yield, morphological structure and thermal properties. The study has found that the crystallinity index of the obtained nanocellulose products were significantly higher (62.2-83.6%) than that of its starting material due to the successive elimination of lignin, hemicellulose and amorphous regions of cellulose, which were in good agreement with the FTIR analysis. The evidence of the successful production of nanocellulose was given by TEM observation which has revealed the fibril widths were ranging from 15.6 to 46.2nm, with high cellulose content (>90%), depending on the cellulosic origin. The physicochemical properties of processed samples have confirmed that the isolation of high purity nanocellulose materials from different daily spent products is possible. The comparative study can help to provide a deep insight on the possibility of revalorizing the municipal solid wastes into nanocellulose via the simple and versatile one-pot isolation system, which has high potential to be used in commercial applications for sustainable development.
    MeSH terms: Cellulose/chemical synthesis; Cellulose/chemistry*; Panax/chemistry; Lignin; Oxidation-Reduction; Polysaccharides/chemical synthesis; Polysaccharides/chemistry*; Tea/chemistry; Cotton Fiber; Nanostructures/chemistry; Nanocomposites/chemistry*; Solid Waste*
  6. Golkhalkhali B, Rajandram R, Paliany AS, Ho GF, Wan Ishak WZ, Johari CS, et al.
    Asia Pac J Clin Oncol, 2018 Jun;14(3):179-191.
    PMID: 28857425 DOI: 10.1111/ajco.12758
    AIM: Colorectal cancer patients on chemotherapy usually have elevated levels of inflammatory markers and experience numerous side effects from chemotherapy thereby leading to poor quality of life. Omega-3 fatty acid and microbial cell preparation (MCP) have been known to provide significant benefits in patients on chemotherapy. The aim of this study was to determine the effect of supplementation of omega-3 fatty acid and MCP in quality of life, chemotherapy side effects and inflammatory markers in colorectal cancer patients on chemotherapy.

    METHODS: A double-blind randomized study was carried out with 140 colorectal cancer patients on chemotherapy. Subjects were separated into two groups to receive either placebo or MCP [30 billion colony-forming unit (CFUs) per sachet] at a dose of two sachets daily for 4 weeks, and omega-3 fatty acid at a dose of 2 g daily for 8 weeks. Outcomes measured were quality of life, side effects of chemotherapy and levels of inflammatory markers such as interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α) and C-reactive protein.

    RESULTS: The supplementation with MCP and omega-3 fatty acid improved the overall quality of life and alleviated certain side effects of chemotherapy. The supplementation with MCP and omega-3 fatty acid also managed to reduce the level of IL-6 (P = 0.002). There was a significant rise in the placebo group's serum TNF-α (P = 0.048) and IL-6 (P = 0.004).

    CONCLUSION: The combined supplementation with MCP and omega-3 fatty acid may improve quality of life, reduce certain inflammatory biomarkers and relieve certain side effects of chemotherapy in colorectal patients on chemotherapy.

    MeSH terms: Aged; Double-Blind Method; Female; Humans; Male; Middle Aged; Quality of Life/psychology*; Colorectal Neoplasms/drug therapy*; Colorectal Neoplasms/pathology; Fatty Acids, Omega-3/pharmacology; Fatty Acids, Omega-3/therapeutic use*; Probiotics/pharmacology; Probiotics/therapeutic use*
  7. Yee A, Hoong MC, Joyce YC, Loh HS
    Subst Use Misuse, 2018 01 28;53(2):276-285.
    PMID: 28857640 DOI: 10.1080/10826084.2017.1342661
    BACKGROUND: Nicotine use disorder is highly prevalent among methadone maintenance patients with its tobacco-related problems. However, the treatment modalities for nicotine use disorder remain limited.
    OBJECTIVE: Our meta-analysis aims to examine the effectiveness of smoking cessation treatment in this group of patients.
    METHODS: A total of 1358 participants were recruited from 9 eligible studies, published from the start of studies in this field till Feb 2016, identified from PubMed, OVID, EMBASE and Google Scholar databases. Two independent reviewers assessed the eligibility of each report based on predefined inclusion criteria. Pooled odd ratios or weighted mean difference was performed using random effects.
    RESULTS: The treatments for smoking cessation among MMT patients are behavioral and pharmacological therapies. Smoking cessation was better achieved with nicotine replacement therapy (NRT) especially with adjunctive behavioral therapy. The pooled odds ratio of smokers' abstinence of smoking by the end of the treatment between NRT and placebo group was 6.32 (95% CI = 1.18 to 33.75, p = 0.03) and is statistically significant. Any additional behavior therapy among MMT patients who received the smoking cessation pharmacotherapy as the primary treatment was not better than those who only received standard care (Odds ratio was 2.53, 95% CI = 0.75 to 8.56, p = 0.14).
    CONCLUSIONS: Although NRT is proven to be effective in smoking cessation, more studies are warranted to prove the effects of other pharmacotherapy in smoking cessation.
    MeSH terms: Combined Modality Therapy/statistics & numerical data; Humans; Methadone/therapeutic use; Psychotherapy; Tobacco Use Disorder/drug therapy; Tobacco Use Disorder/therapy; Smoking Cessation/statistics & numerical data*; Opiate Substitution Treatment/psychology*
  8. Faisal A, Ng SC, Goh SL, Lai KW
    Med Biol Eng Comput, 2018 Apr;56(4):657-669.
    PMID: 28849317 DOI: 10.1007/s11517-017-1710-2
    Quantitative thickness computation of knee cartilage in ultrasound images requires segmentation of a monotonous hypoechoic band between the soft tissue-cartilage interface and the cartilage-bone interface. Speckle noise and intensity bias captured in the ultrasound images often complicates the segmentation task. This paper presents knee cartilage segmentation using locally statistical level set method (LSLSM) and thickness computation using normal distance. Comparison on several level set methods in the attempt of segmenting the knee cartilage shows that LSLSM yields a more satisfactory result. When LSLSM was applied to 80 datasets, the qualitative segmentation assessment indicates a substantial agreement with Cohen's κ coefficient of 0.73. The quantitative validation metrics of Dice similarity coefficient and Hausdorff distance have average values of 0.91 ± 0.01 and 6.21 ± 0.59 pixels, respectively. These satisfactory segmentation results are making the true thickness between two interfaces of the cartilage possible to be computed based on the segmented images. The measured cartilage thickness ranged from 1.35 to 2.42 mm with an average value of 1.97 ± 0.11 mm, reflecting the robustness of the segmentation algorithm to various cartilage thickness. These results indicate a potential application of the methods described for assessment of cartilage degeneration where changes in the cartilage thickness can be quantified over time by comparing the true thickness at a certain time interval.
    MeSH terms: Adult; Algorithms; Humans; Image Processing, Computer-Assisted/methods*; Male; Ultrasonography/methods*; Databases, Factual; Young Adult
  9. Yeo EH, Goh WL, Chow SC
    Toxicol. Mech. Methods, 2018 Mar;28(3):157-166.
    PMID: 28849708 DOI: 10.1080/15376516.2017.1373882
    The leucine aminopeptidase inhibitor, benzyloxycarbonyl-leucine-chloromethylketone (z-L-CMK), was found to be toxic and readily induce cell death in Jurkat T cells. Dose-response studies show that lower concentration of z-L-CMK induced apoptosis in Jurkat T cells whereas higher concentration causes necrosis. In z-L-CMK-induced apoptosis, both the initiator caspases (-8 and -9) and effector caspases (-3 and -6) were processed to their respective subunits. However, the caspases remained intact in z-L-CMK-induced necrosis. The caspase inhibitor, z-VAD-FMK inhibited z-L-CMK-mediated apoptosis and caspase processing but has no effect on z-L-CMK-induced necrosis in Jurkat T cells. The high mobility group protein B1 (HMGB1) protein was found to be released into the culture medium by the necrotic cells and not the apoptotic cells. These results indicate that the necrotic cell death mediated by z-L-CMK at high concentrations is via classical necrosis rather than secondary necrosis. We also demonstrated that cell death mediated by z-L-CMK was associated with oxidative stress via the depletion of intracellular glutathione (GSH) and increase in reactive oxygen species (ROS), which was blocked by N-acetyl cysteine. Taken together, the results demonstrated that z-L-CMK is toxic to Jurkat T cells and induces apoptosis at low concentrations, while at higher concentrations the cells die of necrosis. The toxic side effects in Jurkat T cells mediated by z-L-CMK are associated with oxidative stress via the depletion of GSH and accumulation of ROS.
    MeSH terms: Amino Acid Chloromethyl Ketones/antagonists & inhibitors; Amino Acid Chloromethyl Ketones/toxicity*; Cell Survival/drug effects; Glutathione/antagonists & inhibitors; Glutathione/metabolism; Humans; Leucyl Aminopeptidase/antagonists & inhibitors*; Leucyl Aminopeptidase/metabolism; Necrosis/chemically induced*; Nucleosomes/drug effects; Nucleosomes/immunology; Nucleosomes/metabolism; Osmolar Concentration; Peptide Fragments/metabolism; Protease Inhibitors/toxicity*; Protease Inhibitors/chemistry; T-Lymphocytes/cytology; T-Lymphocytes/drug effects*; T-Lymphocytes/immunology; T-Lymphocytes/metabolism; Biomarkers/metabolism; Apoptosis/drug effects*; Oxidative Stress/drug effects*; Jurkat Cells; Caspases/metabolism; Caspases/chemistry; Membrane Potential, Mitochondrial/drug effects; Cell Nucleus Shape/drug effects; Proteolysis/drug effects; Caspase Inhibitors/pharmacology
  10. Hariri A, Mohamad Noor N, Paiman NA, Ahmad Zaidi AM, Zainal Bakri SF
    Int J Occup Saf Ergon, 2018 Dec;24(4):646-651.
    PMID: 28849717 DOI: 10.1080/10803548.2017.1368950
    Welding operations are rarely conducted in an air-conditioned room. However, a company would set its welding operations in an air-conditioned room to maintain the humidity level needed to reduce hydrogen cracks in the specimen being welded. This study intended to assess the exposure to metal elements in the welders' breathing zone and toenail samples. Heavy metal concentration was analysed using inductively coupled plasma mass spectrometry. The lung function test was also conducted and analysed using statistical approaches. Chromium and manganese concentrations in the breathing zone exceeded the permissible exposure limit stipulated by Malaysian regulations. A similar trend was obtained in the concentration of heavy metals in the breathing zone air sampling and in the welders' toenails. Although there was no statistically significant decrease in the lung function of welders, it is suggested that exposure control through engineering and administrative approaches should be considered for workplace safety and health improvement.
    MeSH terms: Air Conditioning; Air Pollutants, Occupational/analysis; Chromium/analysis; Environmental Monitoring; Forced Expiratory Volume; Humans; Malaysia; Manganese/analysis; Nails/chemistry*; Vital Capacity; Welding*; Occupational Exposure/analysis*; Metals, Heavy/analysis*; Manufacturing Industry
  11. Jaafar MH, Arifin K, Aiyub K, Razman MR, Ishak MIS, Samsurijan MS
    Int J Occup Saf Ergon, 2018 Dec;24(4):493-506.
    PMID: 28849991 DOI: 10.1080/10803548.2017.1366129
    The construction industry plays a significant role in contributing to the economy and development globally. During the process of construction, various hazards coupled with the unique nature of the industry contribute to high fatality rates. This review refers to previous published studies and related Malaysian legislation documents. Four main elements consisting of human, worksite, management and external elements which cause occupational accidents and illnesses were identified. External and management elements are the underlying causes contributing to occupational safety and health (OSH), while human and worksite elements are more apparent causes of occupational accidents and illnesses. An effective OSH management approach is required to contain all hazards at construction sites. An approach to OSH management constructed by elements of policy, process, personnel and incentive developed in previous work is explored. Changes to the sub-elements according to previous studies and the related Malaysian legislation are also covered in this review.
    MeSH terms: Accident Prevention/methods; Humans; Malaysia; Occupational Health*; Workplace; Safety Management/legislation & jurisprudence; Safety Management/organization & administration*; Construction Industry/methods; Construction Industry/organization & administration*
  12. Kabir MZ, Hamzah NAB, Ghani H, Mohamad SB, Alias Z, Tayyab S
    Spectrochim Acta A Mol Biomol Spectrosc, 2018 Jan 15;189:485-494.
    PMID: 28843881 DOI: 10.1016/j.saa.2017.08.051
    Interaction of an anticancer drug, vandetanib (VDB) with a ligand transporter, lysozyme (LYZ) was explored using multispectroscopic techniques, such as fluorescence, absorption and circular dichroism along with computational analysis. Fluorescence data and absorption results confirmed VDB-LYZ complexation. VDB-induced quenching was characterized as static quenching based on inverse correlation of KSV with temperature as well as kq values. The complex was characterized by the weak binding constant (Ka=4.96-3.14×103M-1). Thermodynamic data (ΔS=+12.82Jmol-1K-1; ΔH=-16.73kJmol-1) of VDB-LYZ interaction revealed participation of hydrophobic and van der Waals forces along with hydrogen bonds in VDB-LYZ complexation. Microenvironmental perturbations around tryptophan and tyrosine residues as well as secondary and tertiary structural alterations in LYZ upon addition of VDB were evident from the 3-D fluorescence, far- and near-UV CD spectral analyses, respectively. Interestingly, addition of VDB to LYZ significantly increased protein's thermostability. Molecular docking results suggested the location of VDB binding site near the LYZ active site while molecular dynamics simulation results suggested stability of VDB-LYZ complex. Presence of Mg2+, Ba2+ and Zn2+ was found to interfere with VDB-LYZ interaction.
    MeSH terms: Animals; Chickens; Circular Dichroism; Enzyme Stability; Ions; Kinetics; Metals; Muramidase/metabolism*; Muramidase/chemistry*; Piperidines/metabolism*; Piperidines/chemistry*; Quinazolines/metabolism*; Quinazolines/chemistry*; Spectrometry, Fluorescence; Spectrophotometry, Ultraviolet; Thermodynamics; Cluster Analysis; Protein Structure, Secondary; Biophysical Phenomena*; Molecular Dynamics Simulation*; Molecular Docking Simulation*
  13. Voon YS, Patil PG
    J Prosthet Dent, 2018 Apr;119(4):568-573.
    PMID: 28838820 DOI: 10.1016/j.prosdent.2017.05.011
    STATEMENT OF PROBLEM: The genial tubercle is a clinically palpable landmark in the mandible and can be identified in cone beam computed tomography (CBCT). Its location can be used to measure the safe zone in the interforaminal region of the mandible. These measurements may be helpful for implant treatment planning in patients with complete edentulism.

    PURPOSE: The purpose of this clinical study was to evaluate the safe distance in the interforaminal region of the mandible measured from the genial tubercle level for implant osteotomy in a Chinese-Malaysian population.

    MATERIAL AND METHODS: A total of 201 Digital Imaging and Communications in Medicine (DICOM) files were selected for the study from the CBCTs of dentate or edentulous Chinese-Malaysian adult patients with ongoing or completed treatments. Measurements were made with implant planning software. The anatomy of the whole mandible was assessed in the coronal cross-sectional, horizontal view and in panoramic view. Measurements were obtained in millimeters on one side by locating and marking a genial tubercle and then marking the mesial margin of the mental foramen and the anterior loop of the inferior alveolar nerve. The corresponding points of these landmarks were identified on the crest of the mandibular ridge to measure the linear distances. All the measurement steps were repeated on the other side. The linear distance of 2 mm was deducted from the total distance between the genial tubercle and the anterior loop separately for left and right side measurements to identify the safe zone. The mixed 2-way analysis of variance (ANOVA) test was used to analyze side and sex-related variations.

    RESULTS: The mean safe zone measured at the crestal level from the genial tubercle site on the left side of the mandible was 21.12 mm and 21.67 mm on the right side. A statistically significant (P

    MeSH terms: Adolescent; Adult; Aged; Aged, 80 and over; Dental Implantation, Endosseous*; Female; Humans; Jaw, Edentulous/surgery; Malaysia; Male; Mandible/anatomy & histology; Mandible/surgery*; Mandibular Nerve; Middle Aged; Osteotomy; Cranial Nerve Injuries/prevention & control; Asian Continental Ancestry Group; Cone-Beam Computed Tomography*; Young Adult; Anatomic Landmarks*
  14. Sasmita AO, Wong YP, Ling APK
    Asia Pac J Clin Oncol, 2018 Feb;14(1):40-51.
    PMID: 28840962 DOI: 10.1111/ajco.12756
    Glioblastoma multiforme (GBM) is a malignant tumor within the brain. Generally classified as primary and secondary with several different subtypes, ample molecular biomarkers have risen throughout the years which have garnered the attention of researchers. The advancements in genomics and proteomics have allowed researchers to gather prominent molecular biomarkers. All these biomarkers are gathered by means of biopsy or bodily fluid sample collection and are quantitatively analyzed by polymerase chain reaction coupled with other computational technologies. This review highlights the significance, regulation and prevalence of molecular biomarkers such as O6 -methylguanine-DNA methyltransferase, epidermal growth factor receptor vIII, isocitrate dehydrogenase mutation and several others which expressed differently in different types and molecular subtypes of GBM. The discoveries and roles of GBM-specific microRNAs including miR-21 and miR-10b as biomarkers with promising prognostic values were also delineated. The role and mechanism of biomarkers in GBM tumorigenesis are essential in the development of therapy for patients suffering from the disease itself. Thus, this review also discusses the mechanisms, effects and limitations of therapy such as temozolomide, viral gene transfer, biomarker-based vaccines or even engineered T cells for more specific responses. Biomarkers have displayed a high value and could eventually be utilized as drug targets. It is hoped that by combining different aspects of the disease which present with different biomarkers could lead to the development of a robust, effective and innovative take on GBM therapy.
  15. Mairami FF, Allotey P, Warren N, Mak JS, Reidpath DD
    Disabil Rehabil Assist Technol, 2018 10;13(7):658-664.
    PMID: 28836873 DOI: 10.1080/17483107.2017.1369586
    BACKGROUND: Stroke is a leading cause of disability that limits everyday activities and reduces social participation. Provision of assistive devices helps to achieve independence and social inclusion. However, due to limited resources or a lack of suited objects for their needs, individuals with disabilities in low and middle income countries (LMIC) often do not have access to assistive devices. This has resulted in the creation of purpose built innovative solutions. Methodology and case content: This paper uses a single case derived from a larger ethnographic study of stroke survivors in rural Malaysia to demonstrate the role of assistive devices in shaping stroke recovery and how existing structures can be modified. Second, the concept of affordances in relation to structures within the environment, issues of affordability and accessibility of assistive devices for individuals in LMIC are discussed.

    FINDINGS AND CONCLUSIONS: Stroke recovery involves adapting to new limitations and discovering the support necessary to live life. These changes are influenced by a range of environmental factors. Healthcare professionals need to support stroke patients in identifying challenges and work to find innovative ways to address them. Stroke survivors may benefit from the use of an assistive device beyond its clinical function to participate purposefully in activities of daily living. Implications for Rehabilitation Stroke is a cause of disability that limits everyday activities and reduces social participation. Assistive devices help achieve independence, social inclusion and shape stroke recovery. Individuals with disabilities in low and middle income countries often do not have access to assistive devices and resort to innovative solutions that are purpose built. Stroke recovery involves adapting to new limitations and discovering the support necessary to live life as best as possible.

    MeSH terms: Environment; Equipment Design; Disabled Persons/rehabilitation*; Humans; Malaysia; Male; Middle Aged; Rural Population; Self-Help Devices*; Social Support; Wheelchairs; Social Participation; Stroke Rehabilitation/methods*
  16. Ravichandran G, Kumaresan V, Mahesh A, Dhayalan A, Arshad A, Arasu MV, et al.
    Int J Biol Macromol, 2018 Jan;106:1014-1022.
    PMID: 28837852 DOI: 10.1016/j.ijbiomac.2017.08.098
    Chitinases play a vital role during the pathogenic invasion and immunosuppression in various organisms including invertebrates and vertebrates. In this study, we have investigated the participation of MrChit-3 (Macrobrachium rosenbergii Chitinase-3) during host-pathogenic interaction in freshwater prawn, M. rosenbergii. Quantitative real-time PCR analysis showed that the expression of MrChit-3 was up-regulated during bacterial, viral and laminarin challenge. Moreover, to understand the antimicrobial role of the GH18 domain, a putative membrane-targeting antimicrobial peptide (MrVG) was identified from the GH18 domain region of the protein and it was chemically synthesized. Physico-chemical features of the GH18 derived antimicrobial peptide (AMP) was assessed by various in silico tools and the antimicrobial property of the peptide was confirmed from in vitro studies. The membrane targeting mechanism of the peptide was determined by flow cytometry (FACS) and scanning electron microscope (SEM) analysis. Interestingly, the peptide was able to inhibit the growth of a chitinolytic fungal pathogen, Aspergillus niger, which was isolated from the shells of M. rosenbergii. The toxicity studies such as hemolysis activity on human blood erythrocytes and cell viability assay with primary kidney cells, HEK293 of MrVG revealed that the peptide was not involved in inducing any toxicity.
    MeSH terms: Amino Acid Sequence/genetics; Animals; Chitinase/genetics; Chitinase/pharmacology; Chitinase/chemistry*; Erythrocytes/drug effects; Erythrocytes/microbiology; Hemolysis/drug effects; Humans; Stress, Physiological/genetics; Sequence Alignment; Antimicrobial Cationic Peptides/genetics; Antimicrobial Cationic Peptides/pharmacology*; Antimicrobial Cationic Peptides/chemistry; Palaemonidae/enzymology; Palaemonidae/microbiology; Palaemonidae/chemistry*; Palaemonidae/virology; Host-Pathogen Interactions/genetics*; HEK293 Cells; Protein Domains/genetics
  17. Alkhorayef M, Sulieman A, Babikir E, Daar E, Alnaaimi M, Alduaij M, et al.
    Appl Radiat Isot, 2018 Aug;138:14-17.
    PMID: 28830729 DOI: 10.1016/j.apradiso.2017.08.010
    A pacemaker, which is used for heart resynchronization with electrical impulses, is used to manage many clinical conditions. Recently, the frequency of pacemaker implantation procedures has increased to more than 50% worldwide. During this procedure, patients can be exposed to excessive radiation exposure. Wide range of doses has been reported in previous studies, suggesting that optimization of this procedure has not been fulfilled yet. The current study evaluated patient radiation exposure during cardiac pacemaker procedures and quantified the patient effective dose. A total of 145 procedures were performed for five pacemaker procedures (VVI, VVIR, VVD, VVDR, and DDDR) at two hospitals. Patient doses were measured using the kerma-area product meter. Effective doses were estimated using software based on Monte Carlo simulation from the National Radiological Protection Board (NRPB, now The Health Protection Agency). The effective dose values were used to estimate cancer risk from the pacemaker procedure. Patient demographic data and exposure parameters for fluoroscopy and radiography were quantified. The mean patient doses ± SD per procedure (Gycm2) for VVI, VVIR, VVD, VVDR, and DDDR were 1.52 ± 0.13 (1.43-1.61), 3.28 ± 2.34 (0.29-8.73), 3.04 ± 1.67 (1.57-4.86), 6.04 ± 2.326 3.29-8.58), and 8.8 ± 3.6 (4.5-26.20), respectively. The overall patient effective dose was 1.1mSv per procedure. It is obvious that the DDDR procedure exposed patients to the highest radiation dose. Patient dose variation can be attributed to procedure type, exposure parameter settings, and fluoroscopy time. The results of this study showed that patient doses during different pacemaker procedures are lower compared to previous reported values. Patient risk from pacemaker procedure is low, compared to other cardiac interventional procedures. Patients' exposures were mainly influenced by the type of procedures and the clinical indication.
    MeSH terms: Radiation Exposure/analysis; Radiation Exposure/prevention & control; Adult; Aged; Aged, 80 and over; Female; Fluoroscopy/adverse effects; Fluoroscopy/methods*; Humans; Male; Middle Aged; Monte Carlo Method; Neoplasms, Radiation-Induced/etiology; Pacemaker, Artificial*; Radiation Dosage; Radiation Protection/methods; Radiometry/statistics & numerical data; Risk Factors; Radiography, Interventional/adverse effects; Radiography, Interventional/methods*
  18. Cahyani NDW, Martini B, Choo KR, Ab Rahman NH, Ashman H
    J Forensic Sci, 2018 May;63(3):868-881.
    PMID: 28833117 DOI: 10.1111/1556-4029.13624
    Communication apps can be an important source of evidence in a forensic investigation (e.g., in the investigation of a drug trafficking or terrorism case where the communications apps were used by the accused persons during the transactions or planning activities). This study presents the first evidence-based forensic taxonomy of Windows Phone communication apps, using an existing two-dimensional Android forensic taxonomy as a baseline. Specifically, 30 Windows Phone communication apps, including Instant Messaging (IM) and Voice over IP (VoIP) apps, are examined. Artifacts extracted using physical acquisition are analyzed, and seven digital evidence objects of forensic interest are identified, namely: Call Log, Chats, Contacts, Locations, Installed Applications, SMSs and User Accounts. Findings from this study would help to facilitate timely and effective forensic investigations involving Windows Phone communication apps.
    MeSH terms: Communication; Methyltestosterone; Voice; Artifacts; Terrorism; Drug Trafficking
  19. Budiningsari D, Shahar S, Abdul Manaf Z, Susetyowati S
    Int Nurs Rev, 2018 Sep;65(3):317-326.
    PMID: 28833124 DOI: 10.1111/inr.12394
    AIM: The aim of this study was to provide a needs assessment related to the current practice of food intake monitoring for hospitalized adult patients among healthcare professionals and obtain feedback for the development of a new dietary assessment tool.

    BACKGROUND: Continuous effort has been made to identify patients at high risk of malnutrition, but monitoring and documentation of nutritional intake are relative less emphasized upon.

    METHODS: A needs assessment through a cross-sectional study design was carried out at six hospitals in Yogyakarta, Indonesia. A self-administered semi-structured questionnaire was filled out by 111 respondents recruited from three different professions (nurses, dietitians and serving assistants) in the wards.

    RESULTS: Seventy per cent of the respondents perceived that the current dietary assessment tool used to record patients' food intake was simple; however, the disadvantage of this tool was its tedious process of computing nutritional values of food consumed. Furthermore, more than half respondents encountered problems in conducting food intake record of patients, primarily due to limited number of human resources, followed by time constraints and perception that such dietary assessment as not part of their job scope.

    DISCUSSION: This study has revealed important information in developing a simple, valid and reliable dietary assessment tool for monitoring food intake of hospitalized patients to be applied by interdisciplinary hospital professionals.

    CONCLUSIONS: Awareness of the important on monitoring nutrient intake of patients should be emphasized among healthcare professionals. The current dietary assessment tool requires modification due to lengthy time taken to complete the task and poor accuracy in intake estimation.

    IMPLICATION FOR NURSING AND HEALTH POLICY: Hospitals should provide protocols and guidelines of cooperation among interdisciplinary professionals, including nurses, which includes a simple dietary assessment tool to assist nutritional management of hospitalized patients.

    MeSH terms: Adult; Energy Intake*; Cross-Sectional Studies; Eating*; Female; Health Personnel; Humans; Indonesia; Male; Middle Aged; Surveys and Questionnaires; Technology Assessment, Biomedical; Nutrition Assessment*; Needs Assessment*; Malnutrition/diagnosis*; Malnutrition/prevention & control*
  20. Omar N, Hamidon NH, Yunus MH, Noordin R, Choong YS, Lim TS
    Biotechnol Appl Biochem, 2018 May;65(3):346-354.
    PMID: 28833498 DOI: 10.1002/bab.1591
    Phage display has been applied successfully as a tool for the generation of monoclonal antibodies (mAbs). Naive antibody libraries are unique as they are able to overcome several limitations associated with conventional mAb generation methods like the hybridoma technology. Here, we performed an in vitro selection and generation of Fab antibodies against Brugia malayi SXP protein (BmSXP), a recombinant antigen for the detection of lymphatic filariasis. We developed a naïve multi ethnic Fab antibody library with an estimated diversity of 2.99 × 109 . The antibody library was used to screen for mAbs against BmSXP recombinant antigen. Soluble monoclonal Fab antibodies against BmSXP were successfully isolated from the naïve library. The Fab antibodies obtained were expressed and analyzed to show its binding capability. The diversity obtained from a pool of donors from various ethnic groups allowed for a diverse antibody library to be generated. The mAbs obtained were also functional in soluble form, which makes it useful for further downstream applications. We believe that the Fab mAbs are valuable for further studies and could also contribute to improvements in the diagnosis of filariasis.
    MeSH terms: Animals; Antibodies, Monoclonal/analysis*; Antibodies, Monoclonal/immunology*; Antigen-Antibody Reactions; Antigens, Helminth/immunology*; Elephantiasis, Filarial/immunology*; Humans; Immunoglobulin Fab Fragments/analysis*; Immunoglobulin Fab Fragments/immunology*; Brugia malayi/immunology*; Peptide Library
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