Browse publications by year: 2018

  1. Shahadin MS, Ab Mutalib NS, Latif MT, Greene CM, Hassan T
    Lung Cancer, 2018 04;118:69-75.
    PMID: 29572006 DOI: 10.1016/j.lungcan.2018.01.016
    Hazardous air pollutants or chemical release into the environment by a variety of natural and/or anthropogenic activities may give adverse effects to human health. Air pollutants such as sulphur dioxide (SO2), nitrogen oxides (NOx), carbon monoxide (CO), heavy metals and particulate matter (PM) affect number of different human organs, especially the respiratory system. The International Agency for Research on Cancer (IARC) reported that ambient air pollution is a cause of lung cancer. Recently, the agency has classified outdoor air pollution as well as PM air pollution as Group 1 carcinogens. In addition, several epidemiological studies have shown a positive association between air pollutants to lung cancer risks and mortality. However, there are only a few studies examining the molecular effects of air pollution exposure specifically in lung cancer due to multiple challenges to mimic air pollution exposure in basic experimentation. Another major issue is the lack of adequate adjustments for exposure misclassification as air pollution may differ temporo-spatially and socioeconomically. Thus, the purpose of this paper is to review the current molecular understanding of air pollution-related lung cancer and potential future direction in this challenging yet important research field.
    MeSH terms: Air Pollutants/adverse effects*; Air Pollution; DNA Damage; Environmental Exposure/adverse effects; Humans; Lung Neoplasms/chemically induced*; Lung Neoplasms/genetics; Lung Neoplasms/epidemiology; Nitrogen Oxides; Respiratory System/pathology*; Risk Factors; Safrole/analogs & derivatives; Genetic Predisposition to Disease; Particulate Matter; Epigenomics; Carcinogenesis
  2. Gray REJ, Ewers RM, Boyle MJW, Chung AYC, Gill RJ
    Sci Rep, 2018 03 23;8(1):5131.
    PMID: 29572517 DOI: 10.1038/s41598-018-23272-y
    Understanding how anthropogenic disturbance influences patterns of community composition and the reinforcing interactive processes that structure communities is important to mitigate threats to biodiversity. Competition is considered a primary reinforcing process, yet little is known concerning disturbance effects on competitive interaction networks. We examined how differences in ant community composition between undisturbed and disturbed Bornean rainforest, is potentially reflected by changes in competitive interactions over a food resource. Comparing 10 primary forest sites to 10 in selectively-logged forest, we found higher genus richness and diversity in the primary forest, with 18.5% and 13.0% of genera endemic to primary and logged respectively. From 180 hours of filming bait cards, we assessed ant-ant interactions, finding that despite considered aggression over food sources, the majority of ant interactions were neutral. Proportion of competitive interactions at bait cards did not differ between forest type, however, the rate and per capita number of competitive interactions was significantly lower in logged forest. Furthermore, the majority of genera showed large changes in aggression-score with often inverse relationships to their occupancy rank. This provides evidence of a shuffled competitive network, and these unexpected changes in aggressive relationships could be considered a type of competitive network re-wiring after disturbance.
    MeSH terms: Animals; Ants/physiology*; Conservation of Natural Resources*; Models, Biological*; Biodiversity*; Forests*
  3. Lim KK, Yoon SY, Mohd Taib NA, Shabaruddin FH, Dahlui M, Woo YL, et al.
    Appl Health Econ Health Policy, 2018 06;16(3):395-406.
    PMID: 29572724 DOI: 10.1007/s40258-018-0384-8
    OBJECTIVE: Previous studies showed that offering BRCA mutation testing to population subgroups at high risk of harbouring the mutation may be cost effective, yet no evidence is available for low- or middle-income countries (LMIC) and in Asia. We estimated the cost effectiveness of BRCA mutation testing in early-stage breast cancer patients with high pre-test probability of harbouring the mutation in Malaysia, an LMIC in Asia.

    METHODS: We developed a decision analytic model to estimate the lifetime costs and quality-adjusted life-years (QALYs) accrued through BRCA mutation testing or routine clinical surveillance (RCS) for a hypothetical cohort of 1000 early-stage breast cancer patients aged 40 years. In the model, patients would decide whether to accept testing and to undertake risk-reducing mastectomy, oophorectomy, tamoxifen, combinations or neither. We calculated the incremental cost-effectiveness ratio (ICER) from the health system perspective. A series of sensitivity analyses were performed.

    RESULTS: In the base case, testing generated 11.2 QALYs over the lifetime and cost US$4815 per patient whereas RCS generated 11.1 QALYs and cost US$4574 per patient. The ICER of US$2725/QALY was below the cost-effective thresholds. The ICER was sensitive to the discounting of cost, cost of BRCA mutation testing and utility of being risk-free, but the ICERs remained below the thresholds. Probabilistic sensitivity analysis showed that at a threshold of US$9500/QALY, 99.9% of simulations favoured BRCA mutation testing over RCS.

    CONCLUSIONS: Offering BRCA mutation testing to early-stage breast cancer patients identified using a locally-validated risk-assessment tool may be cost effective compared to RCS in Malaysia.

    MeSH terms: Breast Neoplasms/diagnosis*; Breast Neoplasms/genetics*; Breast Neoplasms/pathology; Cost-Benefit Analysis; Female; Genetic Testing/economics*; Humans; Markov Chains; Mutation/genetics; Sensitivity and Specificity; Likelihood Functions; Developed Countries; Quality-Adjusted Life Years; Genes, BRCA1*; Early Detection of Cancer*
  4. Ramachandra SS
    J. Periodontol., 2018 Mar 23.
    PMID: 29572836 DOI: 10.1002/JPER.17-0482
    This letter is in regard to the article "Risk of periodontal disease in patients with asthma: a nationwide population-based retrospective cohort study" authored by Shen and collaborators in the August 2017 issue of the Journal of Periodontology. We found the authors' results interesting and believe that addition of the following points may have enhanced the potential implications of their observations. The role of mast cells in asthma is well-established, and mast cells also appear to have a role in the initiation of the inflammatory cascade that leads to periodontal destruction. This article is protected by copyright. All rights reserved.
  5. Jobson L, Miskon N, Dalgleish T, Hitchcock C, Hill E, Golden AM, et al.
    Br J Clin Psychol, 2018 Sep;57(3):382-396.
    PMID: 29572886 DOI: 10.1111/bjc.12181
    OBJECTIVES: Distortions in autobiographical memory have been implicated in major depressive disorder (MDD). Those with MDD demonstrate a 'depressogenic' autobiographical life structure. Research has not examined how culture influences this process. We investigated whether Malay individuals (members of an interdependent culture) with MDD demonstrated a 'depressogenic' autobiographical life structure similar to that of British individuals (members of an independent culture) with MDD.

    DESIGN: A 2 (Culture; Malay, British) × 2 (Mood; depressed, control) cross-sectional design using a card sort task and self-report measures was used.

    METHODS: Malay individuals with MDD or no history of MDD completed the life-structure card-sorting task, which provided a novel method for investigating organizational structure of the life narrative. These data were compared to previously collected data in which British individuals with MDD or without MDD had completed the same task within the same experimental protocol.

    RESULTS: Pan-culturally those with MDD had greater negativity (i.e., used more negative attributes), negative redundancy (i.e., used the same negative attributes repeatedly across life chapters) and negative emodiversity (i.e., had greater variety and relative abundance of negative attributes), and reduced positive redundancy (i.e., used the same positive attributes repeatedly across chapters) in their structuring relative to controls. While the British MDD group had greater compartmentalization (i.e., the negative and positive attributes were clustered separately across different chapters) than British controls, the Malay MDD group had lower levels of compartmentalization than Malay controls.

    CONCLUSIONS: The findings suggest culture may shape aspects of the autobiographical life structure in MDD.

    PRACTITIONER POINTS: The majority of the literature investigating depression pertains to individuals from European Western cultures, despite recognition that depression ranks as one of the most debilitating diseases worldwide. This raises questions as to whether current depression models and interventions can be applied universally or whether they are limited to European Western groups. The current study found that pan-culturally those with MDD had similar structuring of their life story relative to controls. However, there were some cultural differences that need to be considered (e.g., Malay individuals provided less detailed, less elaborate and less emotionally diverse life stories and while the British MDD group had greater compartmentalization than British controls, the Malay MDD group had lower levels of compartmentalization than Malay controls). Limitations of the study included group differences in gender and mood at the time of testing. Cultural differences in the number of attributes used may have influenced findings. Only the Malay group completed the individualism-collectivism measure.

    MeSH terms: Adult; Culture; Depressive Disorder, Major/ethnology*; Depressive Disorder, Major/psychology; Female; Humans; Male; Middle Aged; Memory, Episodic*
  6. Kaur CP, Vadivelu J, Chandramathi S
    J Dig Dis, 2018 May;19(5):262-271.
    PMID: 29573336 DOI: 10.1111/1751-2980.12595
    The 2016 Global Burden of Disease report by WHO revealed that diseases of the gastrointestinal tract (GIT) had one of the highest incidence rates worldwide. The plethora of factors that contribute to the development of GIT-related illnesses can be divided into genetic, environmental and lifestyle factors. Apart from that, the role that infectious agents play in the development of GIT diseases has piqued the interest of researchers worldwide. The human gut harbors approximately 1014 bacteria in it with increasing concentration toward the lower GIT. Among the various microbiota that colonize the human gut, Gram-negative bacteria have been most notoriously linked to GIT-related diseases such as inflammatory bowel disease (IBD) including Crohn's disease and ulcerative colitis and colorectal cancer (CRC). Some of the notable culprits that have been attributed to these diseases are Bacteroides fragilis, Fusobacterium nucleatum, Escherichia coli and Helicobacter pylori. However, studies in recent years are beginning to recognize a new player, Klebsiella pneumoniae (K. pneumoniae) in the causation and progression of GIT diseases. Once synonymous with infections and diseases of the upper respiratory tract, K. pneumoniae has now emerged as one of the pathogens commonly isolated from patients with GIT diseases. However, extensive studies attributing K. pneumoniae to GIT diseases, particularly that of CRC are scanty. Therefore, this review intends to shed light on the association of K. pneumoniae in gastrointestinal diseases such as Crohn's disease, ulcerative colitis as well as CRC.
    MeSH terms: Gastrointestinal Diseases/etiology*; Humans; Klebsiella Infections/complications*; Klebsiella Infections/drug therapy; Klebsiella pneumoniae/isolation & purification*; Klebsiella pneumoniae/pathogenicity; Drug Resistance, Multiple, Bacterial; Virulence Factors/analysis; Lower Gastrointestinal Tract/microbiology*
  7. Schottenfeld RS, Chawarski MC, Sofuoglu M, Chooi WT, Zaharim NM, M Yasin MA, et al.
    Drug Alcohol Depend, 2018 05 01;186:130-137.
    PMID: 29573648 DOI: 10.1016/j.drugalcdep.2018.01.017
    BACKGROUND: Amphetamine type stimulants (ATS) use is highly prevalent and frequently co-occurs with opioid dependence in Malaysia and Asian countries. No medications have established efficacy for treating ATS use disorder. This study evaluated the safety, tolerability, and potential efficacy of atomoxetine for treating ATS use disorder.

    METHODS: Participants with opioid and ATS dependence (N = 69) were enrolled in a pilot, double-blind, placebo-controlled randomized clinical trial; all received buprenorphine/naloxone and behavioral counseling and were randomized to atomoxetine 80 mg daily (n = 33) or placebo (n = 33). The effect size of the between-group difference on the primary outcome, proportion of ATS-negative urine tests, was estimated using Cohen's d for the intention-to-treat (ITT) sample and for higher adherence subsample (≥60 days of atomoxetine or placebo ingestion).

    RESULTS: Participants were all male with mean (SD) age 39.4 (6.8) years. The proportion of ATS-negative urine tests was higher in atomoxetine- compared to placebo-treated participants: 0.77 (0.63-0.91) vs. 0.67 (0.53-0.81, d = 0.26) in the ITT sample and 0.90 (0.75-1.00) vs. 0.64 (0.51-0.78, d = 0.56) in the higher adherence subsample. The proportion of days abstinent from ATS increased from baseline in both groups (p 

    MeSH terms: Atomoxetine Hydrochloride/adverse effects; Atomoxetine Hydrochloride/therapeutic use*; Buprenorphine, Naloxone Drug Combination/therapeutic use; Adult; Behavior Therapy; Buprenorphine/adverse effects; Buprenorphine/therapeutic use*; Depression/drug therapy; Depression/psychology; Double-Blind Method; Humans; Male; Middle Aged; Narcotic Antagonists/adverse effects; Narcotic Antagonists/therapeutic use*; Opioid-Related Disorders/drug therapy; Pilot Projects; Treatment Outcome; Adrenergic Uptake Inhibitors/adverse effects; Adrenergic Uptake Inhibitors/therapeutic use*; Amphetamine-Related Disorders/drug therapy*; Amphetamine-Related Disorders/psychology; Young Adult
  8. Ping BTY, Aziz HA, Idris Z
    J Oleo Sci, 2018;67(3):265-272.
    PMID: 29491321 DOI: 10.5650/jos.ess17164
    High-Performance Liquid Chromatography (HPLC) methods via evaporative light scattering (ELS) and refractive index (RI) detectors are used by the local palm oil industry to monitor the TAG profiles of palm oil and its fractions. The quantitation method used is based on area normalization of the TAG components and expressed as percentage area. Although not frequently used, peak-area ratios based on TAG profiles are a possible qualitative method for characterizing the TAG of palm oil and its fractions. This paper aims to compare these two detectors in terms of peak-area ratio, percentage peak area composition, and TAG elution profiles. The triacylglycerol (TAG) composition for palm oil and its fractions were analysed under similar HPLC conditions i.e. mobile phase and column. However, different sample concentrations were used for the detectors while remaining within the linearity limits of the detectors. These concentrations also gave a good baseline resolved separation for all the TAGs components. The results of the ELSD method's percentage area composition for the TAGs of palm oil and its fractions differed from those of RID. This indicates an unequal response of TAGs for palm oil and its fractions using the ELSD, also affecting the peak area ratios. They were found not to be equivalent to those obtained using the HPLC-RID. The ELSD method showed a better baseline separation for the TAGs components, with a more stable baseline as compared with the corresponding HPLC-RID. In conclusion, the percentage area compositions and peak-area ratios for palm oil and its fractions as derived from HPLC-ELSD and RID were not equivalent due to different responses of TAG components to the ELSD detector. The HPLC-RID has a better accuracy for percentage area composition and peak-area ratio because the TAG components response equally to the detector.
    MeSH terms: Dynamic Light Scattering*; Chromatography, High Pressure Liquid/methods*; Chemical Fractionation; Refractometry/methods*; Sensitivity and Specificity; Triglycerides/analysis*; Volatilization
  9. Abubakar B, Yakasai HM, Zawawi N, Ismail M
    J Food Drug Anal, 2018 04;26(2):706-715.
    PMID: 29567241 DOI: 10.1016/j.jfda.2017.06.010
    Diet-related metabolic diseases, and especially obesity, are metabolic disorders with multifactorial aetiologies. Diet has been a cornerstone in both the aetiology and management of this metabolic disorders. Rice, a staple food for over half of the world's population, could be exploited as part of the solution to check this menace which has been skyrocketing in the last decade. The present study investigated nine forms of rice from three widely grown Malaysian rice cultivars for in vitro and in vivo (glycaemic index and load) properties that could translate clinically into a lower predisposition to diet-related diseases. The germinated brown forms of MRQ 74 and MR 84 rice cultivars had high amylose content percentages (25.7% and 25.0%), high relative percentage antioxidant scavenging abilities of 85.0% and 91.7%, relatively low glycaemic indices (67.6 and 64.3) and glycaemic load (32.3 and 30.1) values, and modest glucose uptake capabilities of 33.69% and 31.25%, respectively. The results show that all things being equal, rice cultivars that are germinated and high in amylose content when compared to their white and low amylose counterparts could translate into a lower predisposition to diet-related diseases from the dietary point of view in individuals who consume this cereal as a staple food.
    MeSH terms: Antioxidants/adverse effects; Antioxidants/metabolism; Antioxidants/chemistry; Color; Disease/etiology; Humans; Malaysia; Plant Extracts/adverse effects; Plant Extracts/metabolism; Plant Extracts/chemistry*; Oryza/adverse effects; Oryza/classification; Oryza/metabolism; Oryza/chemistry*; Seeds/classification; Seeds/growth & development*; Seeds/metabolism; Seeds/chemistry; Germination
  10. Leong YH, Isa ASM, Mohamed Mahmood M, Moey CEJ, Utar Z, Soon YI, et al.
    Regul Toxicol Pharmacol, 2018 Jun;95:280-288.
    PMID: 29567329 DOI: 10.1016/j.yrtph.2018.03.011
    This study aimed to investigate the oral acute and subacute toxicity of Poly [3-hydroxybutyrate-co-4-hydroxybutyrate], P(3HB-co-4HB) in the form of nanoparticles in Sprague-Dawley rats. Acute oral administration of P(3HB-co-4HB) nanoparticles was performed as a single dose up to 2000 mg/kg in six female rats for 14 days. Subacute toxicity study via oral administration for 28 days at doses of 0 (control), 500, 1000 and 2000 mg/kg in rats (10 rats in each group, female:male = 1:1) was conducted. The estimated lethal dose (LD50) of P(3HB-co-4HB) nanoparticles was >2000 mg/kg. No mortality, unusual changes in behaviour, adverse clinical signs, abnormal changes in body weights or food consumption were observed on all animals treated with P(3HB-co-4HB) nanoparticles during 14 days of the acute toxicity study. In the subacute test, there was no mortality and toxicologically significant changes in clinical signs, body weights, food consumption, hematology, clinical biochemistry, urinalysis, macroscopic findings, organ weights as well as histopathological examination were observed.
    MeSH terms: Administration, Oral; Animals; Female; Hydroxybutyrates/toxicity*; Lethal Dose 50; Male; Polyesters/toxicity*; Rats, Sprague-Dawley; Toxicity Tests, Acute; Nanoparticles/toxicity*; Toxicity Tests, Subacute
  11. Damayanthi HDWT, Moy FM, Abdullah KL, Dharmaratne SD
    Arch Gerontol Geriatr, 2018 03 16;76:215-220.
    PMID: 29567617 DOI: 10.1016/j.archger.2018.03.009
    BACKGROUND: Population ageing has become a public health issue as it is associated with increased morbidity, institutionalization and death. These may directly affect health-related quality of life (HRQOL) of older people.

    PURPOSE: The aim of the study was to investigate HRQOL and its associated factors among community-dwelling older people in Kandy district, Sri Lanka.

    METHOD: This cross-sectional survey involved 1300 older people. The Euro 5D-3L, International Physical Activity Questionnaire, body mass index, handgrip strength were used to measure HRQOL, physical activity and nutritional status of older people respectively. Factors associated with health-related quality of life were identified through complex sample logistic regression analysis.

    RESULTS: Majority of older people (81.9%) reported poor health-related quality of life. Middle old (aOR: 12.06, 95% CI: 5.76, 25.23), very old (aOR: 174.74, 95% CI: 39.74, 768.38), vegetarian diets (aOR: 2.13, 95% CI: 1.14, 3.96), under-nutrition (aOR: 3.41, 95% CI: 1.65, 7.04) and over-nutrition (aOR: 1.85, 95% CI: 1.04, 3.28) were significantly associated with poor HRQOL. Using dentures (aOR: 0.05, 95% CI: 0.28, 0.90) was found as a protective factor for poor HRQOL.

    CONCLUSIONS: HRQOL was poor among community-dwelling older people in Kandy district. Nutrition-related factors need to be further investigated to improve HRQOL among older people.

    MeSH terms: Adult; Aged; Aged, 80 and over; Cross-Sectional Studies; Female; Humans; Male; Middle Aged; Quality of Life*; Hand Strength; Independent Living*
  12. Sivagurunathan A, Atwa AM, Lobetti R
    JFMS Open Rep, 2018 03 13;4(1):2055116917752587.
    PMID: 29568541 DOI: 10.1177/2055116917752587
    Objectives: Feline ownership is popular and represents the largest segment of the pet population in Malaysia. Most feline owners own, on average, 2-3 cats, with some having >10 cats per household. Feline immunodeficiency virus (FIV) and feline leukaemia virus (FeLV) are two clinically important viral infections in cats. Documenting the prevalence of these diseases in the feline population is important for both veterinarians and the public.

    Methods: This was a retrospective study, using data collected from the domestic cat population seen at a 24 h private veterinary hospital in Malaysia, to determine the prevalence of FIV and FeLV in an urban area and risk factors associated with these infections. Between 2010 and 2016, 2230 blood samples were collected and tested for FIV antibodies and FeLV antigen using commercially available ELISA test kits.

    Results: In total, 10.0% (n = 224; 95% confidence interval [CI] 8.80-11.26) were seropositive for FIV; 12.0% (n = 267; 95% CI 10.62-13.32) were seropositive for FeLV; and 2.6% (n = 58; 95% CI 2.01-3.17) were seropositive for both.

    Conclusions and relevance: The prevalence of FIV is lower and FeLV higher than previously documented for this region. Because of the immunosuppressive potential of both viruses, client education and use of appropriate control strategies such as routine screening, vaccination and eradication should be considered.
    MeSH terms: Animals; Cats; Enzyme-Linked Immunosorbent Assay; Leukemia Virus, Feline; Hospitals, Animal; Malaysia; Ownership; Retrospective Studies; Risk Factors; Vaccination; Prevalence; Confidence Intervals; Immunodeficiency Virus, Feline; Feline Acquired Immunodeficiency Syndrome; Veterinarians
  13. Javaid MU, Isha ASN, Sabir AA, Ghazali Z, Nübling M
    Biomed Res Int, 2018;2018:9563714.
    PMID: 29568773 DOI: 10.1155/2018/9563714
    Psychosocial risks are considered as a burning issue in the Asia-Pacific region. The aim of this study was to investigate the impact of psychosocial work environment factors on health of petrochemical industry workers of Malaysia. In lieu to job demands-resources theory, significant positive associations were found between quantitative demands, work-family conflict, and job insecurity with stress, while a significant negative association of role clarity as a resource factor with stress was detected. We also found that quantitative demands were significantly associated with the mean arterial pressure (MAP). Multistage sampling procedure was used to collect study sample. Structural Equation Modeling was used to identify relationship between the endogenous and exogenous variables. Finally, the empirically tested psychosocial work environment model will further help in providing a better risk assessment in different industries and enterprises.
    MeSH terms: Humans; Malaysia; Mental Health; Work
  14. Liu X, Zhang R, Shi H, Li X, Li Y, Taha A, et al.
    Mol Med Rep, 2018 05;17(5):7227-7237.
    PMID: 29568864 DOI: 10.3892/mmr.2018.8791
    Ultraviolet (UV) radiation induces DNA damage, oxidative stress, and inflammatory processes in skin, resulting in photoaging. Natural botanicals have gained considerable attention due to their beneficial protection against the harmful effects of UV irradiation. The present study aimed to evaluate the ability of curcumin (Cur) to protect human dermal fibroblasts (HDFs) against ultraviolet A (UVA)‑induced photoaging. HDFs were treated with 0‑10 µM Cur for 2 h and subsequently exposed to various intensities of UVA irradiation. The cell viability and apoptotic rate of HDFs were investigated by MTT and flow cytometry assays, respectively. The effect of UVA and Cur on the formation of reactive oxygen species (ROS), malondialdehyde levels, which are an indicator of ROS, and the levels/activity of antioxidative defense proteins, including glutathione, superoxide dismutase and catalase, were evaluated using 2',7'-dichlorofluorescin diacetate and commercial assay kits. Furthermore, western blotting was performed to determine the levels of proteins associated with endoplasmic reticulum (ER) stress, the apoptotic pathway, inflammation and the collagen synthesis pathway. The results demonstrated that Cur reduced the accumulation of ROS and restored the activity of antioxidant defense enzymes, indicating that Cur minimized the damage induced by UVA irradiation in HDFs. Furthermore, western blot analysis demonstrated that Cur may attenuate UVA‑induced ER stress, inflammation and apoptotic signaling by downregulating the protein expression of glucose‑regulated protein 78, C/EBP‑homologous protein, nuclear factor‑κB and cleaved caspase‑3, while upregulating the expression of Bcl‑2. Additionally, it was demonstrated that Cur may regulate collagen metabolism by decreasing the protein expression of matrix metalloproteinase (MMP)‑1 and MMP‑3, and may promote the repair of cells damaged as a result of UVA irradiation through increasing the protein expression of transforming growth factor‑β (TGF‑β) and Smad2/3, and decreasing the expression of the TGF‑β inhibitor, Smad7. In conclusion, the results of the present study indicate the potential benefits of Cur for the protection of HDFs against UVA‑induced photoaging and highlight the potential for the application of Cur in skin photoprotection.
    MeSH terms: Antineoplastic Agents/pharmacology; Cells, Cultured; Child, Preschool; Curcumin/pharmacology*; Fibroblasts/drug effects*; Fibroblasts/pathology; Fibroblasts/radiation effects*; Humans; Male; Skin/drug effects*; Skin/pathology; Skin/radiation effects*; Sunscreening Agents/pharmacology*; Ultraviolet Rays/adverse effects*; Skin Aging/drug effects; Skin Aging/radiation effects; Cell Aging/drug effects; Cell Aging/radiation effects; Reactive Oxygen Species/metabolism; Endoplasmic Reticulum Stress/drug effects; Endoplasmic Reticulum Stress/radiation effects
  15. Ayub Khan SM, Few LL, See Too WC
    Mol Med Rep, 2018 May;17(5):7442-7450.
    PMID: 29568919 DOI: 10.3892/mmr.2018.8762
    Choline kinase (CK) is the first enzyme in the CDP-choline pathway for the synthesis of phosphatidylcholine, the most abundant phospholipid in the mammalian cell membrane. This enzyme exists as three isozymes (α1, α2 and β) and the CKα isozyme has been implicated in cancer pathogenesis. Inhibition of CK activity has been proposed for cancer therapies. MicroRNAs (miRNAs/miRs) are non‑coding RNAs that serve important roles in diverse biological pathways and human diseases, including cancer. However, the regulation of CKα gene expression by miRNAs has never been investigated, to the best of the authors' knowledge. In the present study, two miRNA mimics, miR‑876‑5p and miR‑646, were transfected into the HepG2 cell line and the effect of these miRNAs on the levels of CKα mRNA were determined by reverse transcription‑quantitative polymerase chain reaction. Cells transfected with 25 nM miR‑876‑5p for 48 h exhibited significantly lower levels of CKα mRNA. Following optimization, miR‑876‑5p caused four times lower levels of CKα mRNA compared to the negative control. Effects of the miRNAs on HepG2 cell viability and cellular morphology were additionally analyzed using an MTT cell viability assay and scanning electron microscopy, respectively. HepG2 cells that were transfected with the optimum concentration of miR‑876‑5p for the optimum duration exhibited 25% lower viability than negative control and signs of apoptosis in electron micrographs. The results suggested miR‑876‑5p as a potential miRNA modulator of CKα expression in the cells, and may be relevant for the design of more effective anticancer strategy targeting CK.
    MeSH terms: Choline Kinase/genetics*; Humans; Neoplasms/genetics; RNA, Messenger/genetics; Down-Regulation*; Gene Expression Regulation, Neoplastic; MicroRNAs/genetics*; Hep G2 Cells
  16. Musa HI, Hassan L, Shamsuddin ZH, Panchadcharam C, Zakaria Z, Aziz SA
    Environ Monit Assess, 2018 Mar 22;190(4):241.
    PMID: 29569066 DOI: 10.1007/s10661-018-6613-7
    Burkholderia pseudomallei causes melioidosis, a life-threatening infection in both humans and animals. Water is an important reservoir of the bacteria and may serve as a source of environmental contamination leading to infection. B. pseudomallei has an unusual ability to survive in water for a long period. This paper investigates physicochemical properties of water associated with the presence of B. pseudomallei in water supply in small ruminant farms in Peninsular Malaysia. Physicochemical properties of water samples taken from small ruminant farms that included temperature, pH, dissolved oxygen (DO2), optical density (OD), and chemical oxygen demand (COD) were measured after which the samples were cultured for B. pseudomallei. Multivariable logistic regression model revealed that slightly acidic water pH and higher COD level were significantly associated with the likelihood of the B. pseudomallei presence in the water.
    MeSH terms: Animals; Animal Husbandry; Bacteria; Environmental Monitoring*; Fresh Water/microbiology; Fresh Water/chemistry; Humans; Malaysia; Melioidosis/veterinary*; Ruminants/microbiology*; Temperature; Water/chemistry; Water Microbiology/standards*; Water Supply/statistics & numerical data*; Burkholderia pseudomallei/growth & development*; Farms
  17. Ng SS, Lai NM, Nathisuwan S, Chaiyakunapruk N
    Clin Drug Investig, 2018 Jul;38(7):579-591.
    PMID: 29569095 DOI: 10.1007/s40261-018-0641-5
    INTRODUCTION: Anticoagulation therapy is the fundamental approach for stroke prevention in atrial fibrillation (AF) patients. Numerous systematic reviews comparing anticoagulation strategies have been published. We aim to summarize the efficacy and safety evidence of these strategies in AF patients from previously published systematic reviews.

    METHODS: We searched PubMed, EMBASE and Cochrane library from inception to Feb 24th, 2017, to identify systematic reviews and meta-analyses of randomized controlled trials that assessed interventions or strategies to improve oral anticoagulant use in AF patients.

    RESULTS: Thirty-four systematic reviews were eligible for inclusion but only 11 were included in the qualitative analyses, corresponding to 40 unique meta-analyses, as the remaining systematic reviews had overlapping primary studies. There was insufficient evidence to support the efficacy of genotype-guided dosing and pharmacist-managed anticoagulation clinics for stroke prevention in AF patients. Conversely, patient's self-management and novel oral anticoagulants (NOACs), in general were superior to warfarin for preventing stroke and reducing mortality. All interventions showed comparable risk of major bleeding with warfarin.

    CONCLUSION: Findings from this overview support the superiority of NOACs and patient's self-management for preventing stroke in AF patients. However, uncertainties remain on the benefits of genotype-guided dosing and pharmacist-managed anticoagulation clinics due to poor quality evidence, and future research is warranted.

    MeSH terms: Administration, Oral; Anticoagulants/administration & dosage*; Anticoagulants/adverse effects; Atrial Fibrillation/drug therapy*; Atrial Fibrillation/epidemiology; Hemorrhage/chemically induced; Hemorrhage/epidemiology; Humans; Review Literature as Topic*; Risk Factors; Self Care/methods*; Self Care/trends; Warfarin/therapeutic use; Randomized Controlled Trials as Topic/methods; Stroke/epidemiology; Stroke/prevention & control
  18. Ankathil R, Azlan H, Dzarr AA, Baba AA
    Pharmacogenomics, 2018 04;19(5):475-393.
    PMID: 29569526 DOI: 10.2217/pgs-2017-0193
    Despite the excellent efficacy and improved clinical responses obtained with imatinib mesylate (IM), development of resistance in a significant proportion of chronic myeloid leukemia (CML) patients on IM therapy have emerged as a challenging problem in clinical practice. Resistance to imatinib can be due to heterogeneous array of factors involving BCR/ABL-dependent and BCR/ABL-independent pathways. Although BCR/ABL mutation is the major contributory factor for IM resistance, reduced bio-availability of IM in leukemic cells is also an important pharmacokinetic factor that contributes to development of resistance to IM in CML patients. The contribution of polymorphisms of the pharmacogenes in relation to IM disposition and treatment outcomes have been studied by various research groups in numerous population cohorts. However, the conclusions arising from these studies have been highly inconsistent. This review encompasses an updated insight into the impact of pharmacogenetic variability on treatment response of IM in CML patients.
    MeSH terms: Imatinib Mesylate/therapeutic use; Antineoplastic Agents/therapeutic use; Humans; Pharmacogenetics*; Leukemia, Myeloid, Acute/drug therapy*; Leukemia, Myeloid, Acute/genetics*; Drug Resistance, Neoplasm/genetics; Polymorphism, Single Nucleotide/genetics; Protein Kinase Inhibitors/therapeutic use
  19. Ting CY, Ho CC, Yee HJ, Matsah WR
    Big Data, 2018 03;6(1):42-52.
    PMID: 29570414 DOI: 10.1089/big.2017.0085
    Studies have shown that certain features from geography, demography, trade area, and environment can play a vital role in retail site selection, largely due to the impact they asserted on retail performance. Although the relevant features could be elicited by domain experts, determining the optimal feature set can be intractable and labor-intensive exercise. The challenges center around (1) how to determine features that are important to a particular retail business and (2) how to estimate retail sales performance given a new location? The challenges become apparent when the features vary across time. In this light, this study proposed a nonintervening approach by employing feature selection algorithms and subsequently sales prediction through similarity-based methods. The results of prediction were validated by domain experts. In this study, data sets from different sources were transformed and aggregated before an analytics data set that is ready for analysis purpose could be obtained. The data sets included data about feature location, population count, property type, education status, and monthly sales from 96 branches of a telecommunication company in Malaysia. The finding suggested that (1) optimal retail performance can only be achieved through fulfillment of specific location features together with the surrounding trade area characteristics and (2) similarity-based method can provide solution to retail sales prediction.
    MeSH terms: Commerce/economics*; Demography; Forecasting*; Geography*; Humans; United States
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