Browse publications by year: 2013

  1. Shetty P
    Lancet, 2013 May 18;381(9879):1709-10.
    PMID: 23691551
    MeSH terms: Congresses as Topic; Female; Humans; Human Rights; Malaysia; Motion Pictures as Topic*; Power (Psychology)*; Social Conditions; Global Health
  2. Wee LK, Weng SN, Raduan N, Wah SK, Ming WH, Shi CH, et al.
    PMID: 23691624
    Two insular settlements (Kampung Pulau Ketam and Kampung Sungai Lima) were selected to study the population dynamics of Aedes aegypti and Aedes albopictus mosquitoes, vectors of dengue and chikungunya infections. Ovitrap surveillance was conducted between October 2007 and October 2008. There was an inverse negative association between ovitrap index and rainfall at the time of collection, probably because rainfall increased the number of available oviposition sites. Rainfall and ovitrap index were positively associates the 25th day after rainfall occurred. A minor, second peak was observed from the 38th to the 42nd day. The first peak was consistent with the minimum 18-day period between the hatching of eggs to the first oviposition. The second minor peak could be due to the second gonotrophic cycle of the female mosquitoes. Rainfall is an important environmental factor associated with Aedes breeding at the study sites.
    MeSH terms: Aedes/growth & development*; Animals; Humans; Insect Vectors/growth & development*; Larva/growth & development; Malaysia/epidemiology; Oviposition; Population Growth; Rain*; Rural Population*; Seasons*
  3. Kumara TK, Hassan AA, Salmah MR, Bhupinder S
    PMID: 23691627
    The larval growth of Liosarcophaga dux Thompson (Diptera: Sarcophagidae) was studied under varying indoor room temperatures in Malaysia. Five replicates were established. The immature growth of this species from first instar until adult emergence was 307.0+/-3.0 hours. The mean larval length measured for second instar, third instar, post-feeding stage and puparia were 6.5+/-0.5 mm (n=10), 11.8+/-3.7 mm (n=31), 12.7+/-0.8 mm (n=16), and 9.5+/-0.5 mm (n=15), respectively.
    MeSH terms: Air Conditioning; Animals; Humans; Larva/growth & development; Malaysia; Pupa/growth & development; Temperature*; Sarcophagidae/growth & development*
  4. Heo CC, Latif B, Hafiz WM, Zhou HZ
    PMID: 23691629
    We report a series of dermatitis cases caused by the staphilinid beetles, Paederusfuscipes Curtis, among university students staying in the residential college in Puncak Alam, Selangor, Malaysia from 1 January to 31 December 2010. A total of 360 cases (6.0%) were recorded in the Student Health Center throughout the year; the majority of patients stayed at a hostel near an oil palm plantation. Skin symptoms included erythema, edema, vesicular papules, painful blisters, burning sensation, pruritus, hyper pigmentation and peeling of skin. The commonly involved sites were the face, neck, shoulders and arms. Most students noticed the symptoms upon awakening in the morning. The patients were treated with fusidic acid cream and the symptoms resolved within 5 days. These beetles are nocturnally active and enter the room whenever a light source is available. The unintentional crushing of these beetles during sleep causes the release of its hemolymph (paederin) which is the cause of the dermatitis.
    MeSH terms: Adolescent; Adult; Ambulatory Care Facilities; Animals; Beetles*; Dermatitis, Contact/etiology*; Dermatitis, Contact/epidemiology; Female; Hemolymph*; Humans; Malaysia/epidemiology; Male; Retrospective Studies; Schools; Student Health Services; Students; Universities; Young Adult
  5. Soon HK, Saad HA, Taib MN, Rahman HA, Mun CY
    PMID: 23691640
    A twelve-week controlled intervention trial was carried out to evaluate the effects of combined physical activity and dietary intervention on obesity and metabolic risk factors among employees of Universiti Putra Malaysia. Participants consisted of adults aged 25-55 years with no reported chronic diseases but with abdominal obesity. They were assigned to either a combined physical activity and dietary intervention group or a control group. The final sample consisted of 56 participants, with an equal number of 28 for each study group. No significant group effect was observed for any variable except for hip circumference (HC) and fasting plasma glucose (FPG). There was a significant increase in HC (p=0.007) and reduction in FPG (p=0.02) in the intervention group compared to the control group. In the intervention group, HC (p=0.002), triglycerides (TG) (p=0.0001), total cholesterol (TC) (p=0.0001), LDL cholesterol (LDLC) (p=0.0001) and FPG (p=0.005) were significantly reduced, while waist circumference (WC) (p=0.025) and the waist-to-hip ratio (WHR) (p=0.027) were significantly reduced in the control group. No significant change in steps/day or calorie intake'was observed in either group. Taken together, these data indicate that the combined physical activity and dietary intervention was not effective at improving diet or physical activity level. However, the intervention was effective in improving FPG among participants with abdominal obesity. The significant increase in HC in the interventions group warrants further study. These findings will be useful to further improve group-based intervention for the prevention and management of obesity.
    MeSH terms: Adult; Blood Chemical Analysis; Blood Glucose; Body Weights and Measures; Diet*; Female; Humans; Lipids/blood; Malaysia; Male; Middle Aged; Obesity/therapy*; Patient Compliance; Risk Factors; Socioeconomic Factors; Exercise*; Obesity, Abdominal/therapy
  6. Cheah WL, Lee PY, Chang CT, Mohamed HJ, Wong SL
    PMID: 23691641
    Although the association between non-alcoholic fatty liver disease (NAFLD) and metabolic syndrome has been previously firmly established, the prevalence of NAFLD and its risk factors in rural communities remains incompletely defined. This study aimed to determine the prevalence and factors associated with ultrasound-diagnosed NAFLD amongst a rural community in Sarawak. An indigenous village was randomly selected where all adults aged 21 years and above underwent an abdominal ultrasound, biochemical tests and an anthropometric assessment. Respondents with a score > or =8 on an alcohol-use disorders-identification test (AUDIT) indicating harmful or hazardous drinking were excluded. Seventy-seven respondents (46.8% male, mean age 48.4 SD 16.64), met inclusion criteria. The prevalence of ultrasound diagnosed NAFLD was 44.2% (n=34), among them 52.9% had moderate NAFLD. There were no significant age or gender differences between respondents with and without NAFLD, although those with NAFLD were older. Respondents with NAFLD had a significantly higher BMI t,han those without NAFLD (p<0.001). Both male and female respondents with NAFLD had a significantly higher waist circumference than those without NAFLD (p<0.001). Prevalence of diabetes, hypertension, hyperglycemia and hypertriglyceridemia were significantly higher among those with NAFLD. However, there were no significant differences in terms of percentage of unhealthy body fat and muscle, and serum HDL levels. Risk factors independently associated with NAFLD included male gender (odd ratio 0.06; 95% CI 0.008-0.523) and waist circumference (odd ratio 1.2; 95% CI 1.036-1.421). There was a high prevalence of NAFLD and the presence of more severe stages of disease in this indigenous population. Life-style related diseases, such as fatty liver disease, can occur in rural as well as urban populations.
    MeSH terms: Adult; Age Factors; Body Weights and Measures; Fatty Liver/ethnology*; Fatty Liver/ultrasonography; Female; Humans; Life Style/ethnology; Malaysia/epidemiology; Male; Middle Aged; Risk Factors; Rural Population/statistics & numerical data*; Severity of Illness Index; Sex Factors; Health Behavior/ethnology; Body Mass Index; Prevalence; Asian Continental Ancestry Group/statistics & numerical data*; Non-alcoholic Fatty Liver Disease
  7. Faruk A, Belabut D, Ahmad N, Knell RJ, Garner TW
    Conserv Biol, 2013 Jun;27(3):615-24.
    PMID: 23692022 DOI: 10.1111/cobi.12062
    Agriculturally altered vegetation, especially oil-palm plantations, is rapidly increasing in Southeast Asia. Low species diversity is associated with this commodity, but data on anuran diversity in oil-palm plantations are lacking. We investigated how anuran biological diversity differs between forest and oil-palm plantation, and whether observed differences in biological diversity of these areas is linked to specific environmental factors. We hypothesized that biological diversity is lower in plantations and that plantations support a larger proportion of disturbance-tolerant species than forest. We compared species richness, abundance, and community composition between plantation and forest areas and between site types within plantation and forest (forest stream vs. plantation stream, forest riparian vs. plantation riparian, forest terrestrial vs. plantation terrestrial). Not all measures of biological diversity differed between oil-palm plantations and secondary forest sites. Anuran community composition, however, differed greatly between forest and plantation, and communities of anurans in plantations contained species that prosper in disturbed areas. Although plantations supported large numbers of breeding anurans, we concluded the community consisted of common species that were of little conservation concern (commonly found species include Fejervarya limnocharis, Microhyla heymonsi, and Hylarana erythrea). We believe that with a number of management interventions, oil-palm plantations can provide habitat for species that dwell in secondary forests.
    MeSH terms: Agriculture; Animals; Anura/physiology*; Conservation of Natural Resources; Malaysia; Population Dynamics; Arecaceae*; Biodiversity*
  8. Golbabapour S, Majid NA, Hassandarvish P, Hajrezaie M, Abdulla MA, Hadi AH
    OMICS, 2013 Jun;17(6):283-96.
    PMID: 23692361 DOI: 10.1089/omi.2012.0105
    DNA methylation, histone modifications, and chromatin configuration are crucially important in the regulation of gene expression. Among these epigenetic mechanisms, silencing the expression of certain genes depending on developmental stage and tissue specificity is a key repressive system in genome programming. Polycomb (Pc) proteins play roles in gene silencing through different mechanisms. These proteins act in complexes and govern the histone methylation profiles of a large number of genes that regulate various cellular pathways. This review focuses on two main Pc complexes, Pc repressive complexes 1 and 2, and their phylogenetic relationship, structures, and function. The dynamic roles of these complexes in silencing will be discussed herein, with a focus on the recruitment of Pc complexes to target genes and the key factors involved in their recruitment.
    MeSH terms: Animals; Humans; Neoplasms/genetics; Neoplasms/metabolism; Phylogeny; Protein Binding; Protein Conformation; Evolution, Molecular; Gene Silencing*; RNA, Untranslated/metabolism; Embryonic Development/physiology; Polycomb-Group Proteins/classification; Polycomb-Group Proteins/physiology*; Polycomb-Group Proteins/chemistry
  9. Kalantari K, Bin Ahmad M, Shameli K, Khandanlou R
    Int J Nanomedicine, 2013;8:1817-23.
    PMID: 23696700 DOI: 10.2147/IJN.S43693
    The aim of this research was to synthesize and develop a new method for the preparation of iron oxide (Fe(3)O(4)) nanoparticles on talc layers using an environmentally friendly process. The Fe(3)O(4) magnetic nanoparticles were synthesized using the chemical co-precipitation method on the exterior surface layer of talc mineral as a solid substrate. Ferric chloride, ferrous chloride, and sodium hydroxide were used as the Fe(3)O(4) precursor and reducing agent in talc. The talc was suspended in deionized water, and then ferrous and ferric ions were added to this solution and stirred. After the absorption of ions on the exterior surface of talc layers, the ions were reduced with sodium hydroxide. The reaction was carried out under a nonoxidizing oxygen-free environment. There were not many changes in the interlamellar space limits (d-spacing = 0.94-0.93 nm); therefore, Fe(3)O(4) nanoparticles formed on the exterior surface of talc, with an average size of 1.95-2.59 nm in diameter. Nanoparticles were characterized using different methods, including powder X-ray diffraction, transmission electron microscopy, emission scanning electron microscopy, energy dispersive X-ray spectroscopy, and Fourier transform infrared spectroscopy. These talc/Fe(3)O(4) nanocomposites may have potential applications in the chemical and biological industries.
    MeSH terms: Microscopy, Electron, Scanning; Chemical Precipitation*; Sodium Hydroxide; Talc/chemistry*; Powder Diffraction
  10. Tan SS, Maul TH, Mennie NR
    PLoS One, 2013;8(5):e63042.
    PMID: 23696791 DOI: 10.1371/journal.pone.0063042
    Visual to auditory conversion systems have been in existence for several decades. Besides being among the front runners in providing visual capabilities to blind users, the auditory cues generated from image sonification systems are still easier to learn and adapt to compared to other similar techniques. Other advantages include low cost, easy customizability, and universality. However, every system developed so far has its own set of strengths and weaknesses. In order to improve these systems further, we propose an automated and quantitative method to measure the performance of such systems. With these quantitative measurements, it is possible to gauge the relative strengths and weaknesses of different systems and rank the systems accordingly.
    MeSH terms: Auditory Perception/physiology*; Computer Simulation; Humans; Visual Perception/physiology*
  11. Mahdavi M, Namvar F, Ahmad MB, Mohamad R
    Molecules, 2013 May 21;18(5):5954-64.
    PMID: 23698048 DOI: 10.3390/molecules18055954
    The synthesis of nanoparticles has become a matter of great interest in recent times due to their various advantageous properties and applications in a variety of fields. The exploitation of different plant materials for the biosynthesis of nanoparticles is considered a green technology because it does not involve any harmful chemicals. In this study, iron oxide nanoparticles (Fe3O4-NPs) were synthesized using a rapid, single step and completely green biosynthetic method by reduction of ferric chloride solution with brown seaweed (BS, Sargassum muticum) water extract containing sulphated polysaccharides as a main factor which acts as reducing agent and efficient stabilizer. The structural and properties of the Fe3O4-NPs were investigated by X-ray diffraction, Fourier transform infrared spectroscopy, field emission scanning electron microscopy (FESEM), energy dispersive X-ray fluorescence spectrometry (EDXRF), vibrating sample magnetometry (VSM) and transmission electron microscopy. The average particle diameter as determined by TEM was found to be 18 ± 4 nm. X-ray diffraction showed that the nanoparticles are crystalline in nature, with a cubic shape. The nanoparticles synthesized through this biosynthesis method can potentially useful in various applications.
    MeSH terms: Chlorides/chemistry; Ferric Compounds/chemical synthesis; Ferric Compounds/chemistry*; Particle Size; Plant Extracts/chemistry*; Seaweed/chemistry*; Sargassum/chemistry*; Nanoparticles/ultrastructure; Nanoparticles/chemistry*
  12. Ghasemzadeh A, Jaafar HZ
    Molecules, 2013 May 21;18(5):5965-79.
    PMID: 23698049 DOI: 10.3390/molecules18055965
    The effect of foliar salicylic acid (SA) applications (10⁻³ and 10⁻⁵ M) on activities of nitrate reductase, guaiacol peroxidase (POD), superoxide dismutases (SOD), catalase (CAT) and proline enzymes and physiological parameters was evaluated in two ginger varieties (Halia Bentong and Halia Bara) under greenhouse conditions. In both varieties, tested treatments generally enhanced photosynthetic rate and total dry weight. Photosynthetic rate increases were generally accompanied by increased or unchanged stomatal conductance levels, although intercellular CO₂ concentrations of treated plants were typically lower than in controls. Lower SA concentrations were generally more effective in enhancing photosynthetic rate and plant growth. Exogenous application of SA increased antioxidant enzyme activities and proline content; the greatest responses were obtained in plants sprayed with 10⁻⁵ M SA, with significant increases observed in CAT (20.1%), POD (45.2%), SOD (44.1%) and proline (43.1%) activities. Increased CAT activity in leaves is naturally expected to increase photosynthetic efficiency and thus net photosynthesis by maintaining a constant CO₂ supply. Our results support the idea that low SA concentrations (10⁻⁵ M) may induce nitrite reductase synthesis by mobilizing intracellular NO³⁻ and can provide protection to nitrite reductase degradation in vivo in the absence of NO³⁻. Observed positive correlations among proline, SOD, CAT and POD activities in the studied varieties suggest that increased SOD activity was accompanied by increases in CAT and POD activities because of the high demands of H₂O₂ quenching.
    MeSH terms: Anti-Infective Agents/pharmacology*; Antioxidants/metabolism*; Oxidoreductases/metabolism*; Photosynthesis/drug effects; Plant Proteins/metabolism*; Plant Leaves/metabolism*; Salicylic Acid/pharmacology*; Ginger/enzymology*
  13. Afaf AA, Liu CY, Joanna OS
    Clin Ter, 2013;164(2):91-5.
    PMID: 23698199 DOI: 10.7417/CT.2013.1524
    Levobupivacaine is the S(-)enantiomer of bupivacaine, a long acting amino-ester local anaesthetic agent. Cocktail mixture of levobupivacaine and fentanyl infusion is commonly given via epidural for post-operative analgesia. The concentration of levobupivacaine for optimal pain relief with least side effects remained uncertain.
    MeSH terms: Adult; Aged; Anesthetics, Local/administration & dosage*; Bupivacaine/administration & dosage; Bupivacaine/analogs & derivatives*; Double-Blind Method; Female; Humans; Leg/surgery*; Male; Middle Aged; Prospective Studies; Analgesia, Epidural*; Orthopedic Procedures*
  14. Mohamad Fairuz Y, Azian A, Nursiati MT, Srijit D, Hamzaini AH, Wan Zurinah WN, et al.
    Clin Ter, 2013;164(2):119-24.
    PMID: 23698204 DOI: 10.7417/CT.2013.1529
    Aging is attributed to neuronal loss associated with increased oxidative stress. Vitamin E, and in particular, tocotrienol are potent antioxidants, which have been shown to be neuroprotective. The main aim of the present study was to observe the effect of long term intake of vitamin E in the form of tocotrienol rich fraction (TRF) and refined, bleached, deodorized palm olein (RBDPO) on the brain of experimental rats.
    MeSH terms: Animals; Central Nervous System Diseases/chemically induced*; Central Nervous System Diseases/pathology*; Male; Time Factors; Vitamin E/administration & dosage; Vitamin E/adverse effects*; Vitamins/administration & dosage; Vitamins/adverse effects*; Rats, Wistar; Rats
  15. Ngoi ST, Lindstedt BA, Watanabe H, Thong KL
    Jpn J Infect Dis, 2013;66(3):180-8.
    PMID: 23698477
    Salmonella Typhimurium is an important nontyphoidal Salmonella serovar associated with foodborne diseases in many parts of the world. This organism is the major causative agent of nontyphoidal salmonellosis in Malaysia. We aimed to investigate the genetic profiles of the strains isolated from clinical, zoonotic, and dietary sources in Malaysia using multilocus variable number tandem repeat analysis (MLVA) and pulsed-field gel electrophoresis (PFGE). By focusing on the 5 common variable number tandem repeat (VNTR) loci, we found that PFGE (D = 0.99) was more discriminative than MLVA (D = 0.76). The low MLVA score might be because of a lack of VNTR loci STTR6 (81.0%) and STTR10pl (76.2%). Both subtyping methods suggested that our S. Typhimurium strains were largely endemic with limited genetic variation. Furthermore, we observed that biphasic S. Typhimurium strains were dominant (99%) and multidrug resistance was prevalent (50%) within our sample pool. The most frequently observed phenotypes were resistance to compound sulfonamides (49%), tetracycline (51%), and streptomycin (52%). In this study, we documented the genetic relationship, antimicrobial resistance characteristics, and flagellar-phase dominance among S. Typhimurium strains found in Malaysia.
    MeSH terms: Animals; Food Microbiology*; Humans; Malaysia/epidemiology; Salmonella Infections/microbiology*; Salmonella Infections/epidemiology; Salmonella Infections, Animal/microbiology*; Salmonella Infections, Animal/epidemiology; Salmonella typhimurium/classification*; Salmonella typhimurium/genetics*; Salmonella typhimurium/isolation & purification; Genetic Variation; Electrophoresis, Gel, Pulsed-Field; Molecular Epidemiology; Minisatellite Repeats; Endemic Diseases; Drug Resistance, Bacterial; Molecular Typing*
  16. Eshkoor SA, Hamid TA, Nudin SS, Mun CY
    Am J Alzheimers Dis Other Demen, 2013 Jun;28(4):403-7.
    PMID: 23698600 DOI: 10.1177/1533317513488921
    OBJECTIVES: This study aimed to identify the effects of sleep quality, physical activity, environmental quality, age, ethnicity, sex differences, marital status, and educational level on the risk of falls in the elderly individuals with dementia.

    METHODOLOGY: Data were derived from a group of 1210 Malaysian elderly individuals who were noninstitutionalized and demented. The multiple logistic regression model was applied to estimate the risk of falls in respondents.

    RESULTS: Approximately the prevalence of falls was 17% among the individuals. The results of multiple logistic regression analysis revealed that age (odds ratio [OR] = 1.03), ethnicity (OR = 1.76), sleep quality (OR = 1.46), and environmental quality (OR = 0.62) significantly affected the risk of falls in individuals (P < .05). Furthermore, sex differences, marital status, educational level, and physical activity were not significant predictors of falls in samples (P > .05).

    CONCLUSION: It was found that age, ethnic non-Malay, and sleep disruption increased the risk of falls in respondents, but high environmental quality reduced the risk of falls.

    MeSH terms: Accidental Falls/prevention & control; Accidental Falls/statistics & numerical data*; Aged; Aged, 80 and over; Alzheimer Disease/epidemiology*; Dementia/epidemiology*; Environment; Female; Humans; Male; Motor Activity*; Risk Factors; Sleep*; Sleep Wake Disorders/epidemiology*; Prevalence; Logistic Models; Odds Ratio
  17. Sagili S, Malhotra R
    Br J Gen Pract, 2013 Feb;63(607):74.
    PMID: 23700655
    A 51-year-old Malaysian female was referred with a left lower eyelid lesion noticed 4 years ago. She consulted her GP a year ago and was diagnosed to have a chalazion. Her GP requested funding for treatment. The primary care trust (PCT) considered this a low-priority procedure and declined funding. One year later she approached her GP again and was referred to a hospital for management of this eyelid lesion (Figure 1). She underwent a biopsy and the histology was suspicious of a squamous cell carcinoma. She was referred to our unit. On examination, she had a left lower eyelid, firm 4mm nodule with thickening and distortion of tarsal conjunctiva. With a clinical suspicion of sebaceous gland carcinoma (SGC), a wedge excision of the lesion was performed. Paraffin section histology confirmed complete excision of SGC. Delayed repair required a Tenzel flap. She remains asymptomatic at 5-month follow-up.
    MeSH terms: Carcinoma, Squamous Cell/diagnosis*; Diagnosis, Differential; Female; Humans; Malaysia; Middle Aged; Sebaceous Gland Neoplasms/diagnosis*; Chalazion/diagnosis*; Adenocarcinoma, Sebaceous/diagnosis*
  18. Fernandez AR, Omar SZ, Husain R
    Int J Food Sci Nutr, 2013 Nov;64(7):794-800.
    PMID: 23701012 DOI: 10.3109/09637486.2013.798269
    To develop and validate a food frequency questionnaire (FFQ) to estimate the genistein intake in a Malaysian population of pregnant women.
    MeSH terms: Adult; Diet*; Diet Surveys/standards*; Female; Humans; Malaysia; Male; Pregnancy; Surveys and Questionnaires/standards*; Reproducibility of Results; Diet Records; Genistein/administration & dosage*; Genistein/blood; Young Adult
  19. Tan SY, Poh BK, Nadrah MH, Jannah NA, Rahman J, Ismail MN
    J Hum Nutr Diet, 2013 Jul;26 Suppl 1:23-33.
    PMID: 23701375 DOI: 10.1111/jhn.12074
    The assessment of nutritional status among paediatric patients is important for the planning and execution of nutritional strategies that strive to optimise the quality of life and growth among sick children. The present study aimed to evaluate the nutritional status and dietary intake among children with acute leukaemia.
    MeSH terms: Acute Disease; Anthropometry; Arm; Energy Intake*; Child; Child, Preschool; Cross-Sectional Studies; Diet*; Dietary Fats/administration & dosage; Dietary Proteins/administration & dosage; Female; Humans; Leukemia, Myeloid/complications*; Leukemia, Myeloid/drug therapy; Male; Nutritional Status*; Obesity/complications*; Obesity/epidemiology; Skinfold Thickness; Nutrition Assessment; Body Mass Index; Prevalence; Case-Control Studies; Overnutrition; Adiposity; Precursor Cell Lymphoblastic Leukemia-Lymphoma/complications*; Precursor Cell Lymphoblastic Leukemia-Lymphoma/drug therapy; Waist Circumference; Induction Chemotherapy; Consolidation Chemotherapy
  20. Tay ST
    J Vector Ecol, 2013 Jun;38(1):200-2.
    PMID: 23701629 DOI: 10.1111/j.1948-7134.2013.12030.x
    MeSH terms: Animals; Tropical Climate; Wolbachia/physiology*; Rickettsia felis/physiology*; Ctenocephalides/microbiology*
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