Browse publications by year: 2018

  1. Yeo CC
    Mol Microbiol, 2018 05;108(4):331-335.
    PMID: 29624768 DOI: 10.1111/mmi.13958
    GCN5-related N-acetyltransferase (GNAT) is a huge superfamily of proteins spanning the prokaryotic and eukaryotic domains of life. GNAT proteins usually transfer an acetyl group from acetyl-CoA to a wide variety of substrates ranging from aminoglycoside antibiotics to large macromolecules. Type II toxin-antitoxin (TA) modules are typically bicistronic and widespread in bacterial and archael genomes with diverse cellular functions. Recently, a novel family of type II TA toxins was described, which presents a GNAT-fold and functions by acetylating charged tRNA thereby precluding translation. These GNAT toxins are usually associated with a corresponding ribbon-helix-helix-fold (RHH) antitoxin. In this issue, Qian et al. describes a unique GNAT-RHH TA system, designated KacAT, from a multidrug resistant strain of the pathogen, Klebsiella pneumoniae. As most type II TA loci, kacAT is transcriptionally autoregulated with the KacAT complex binding to the operator site via the N-terminus region of KacA to repress kacAT transcription. The crystal structure of the KacT toxin is also presented giving a structural basis for KacT toxicity. These findings expand our knowledge on this newly discovered family of TA toxins and the potential role that they may play in antibiotic tolerance and persistence of bacterial pathogens.
    MeSH terms: Acetylation; Acetyltransferases; Antitoxins; Bacterial Proteins; Bacterial Toxins; Klebsiella pneumoniae*; RNA, Transfer
  2. Alim S, Kafi AKM, Jose R, Yusoff MM, Vejayan J
    Int J Biol Macromol, 2018 Jul 15;114:1071-1076.
    PMID: 29625222 DOI: 10.1016/j.ijbiomac.2018.03.184
    A novel third generation H2O2 biosensor is fabricated using multiporous SnO2 nanofiber/carbon nanotubes (CNTs) composite as a matrix for the immobilization of redox protein onto glassy carbon electrode. The multiporous nanofiber (MPNFs) of SnO2 is synthesized by electrospinning technique from the tin precursor. This nanofiber shows high surface area and good electrical conductivity. The SnO2 nanofiber/CNT composite increases the efficiency of biomolecule loading due to its high surface area. The morphology of the nanofiber has been evaluated by scanning electron microscopy (SEM). Cyclic Voltammetry and amperometry technique are employed to study and optimize the performance of the fabricated electrode. A direct electron transfer between the protein's redox centre and the glassy carbon electrode is established after fabrication of the electrode. The fabricated electrode shows excellent electrocatalytic reduction to H2O2. The catalysis currents increases linearly to the H2O2 concentration in a wide range of 1.0 10-6-1.4×10-4M and the lowest detection limit was 30nM (S/N=3). Moreover, the biosensor showed a rapid response to H2O2, a good stability and reproducibility.
    MeSH terms: Electrodes; Hemoglobins/chemistry*; Hydrogen Peroxide/analysis*; Biosensing Techniques/methods*; Porosity; Tin Compounds/chemistry*; Nanotubes, Carbon/chemistry*; Nanofibers/chemistry*
  3. Loke MY, Yen Gan LL, Islahudin F
    Pak J Pharm Sci, 2018 Mar;31(2):359-364.
    PMID: 29618421
    Falls are a major problem among the elderly and can lead to serious injury. Adults older than 65 years suffer the greatest number of severe falls. This study aims to evaluate the knowledge and perception of medication related falls as well as preferred medication related fall prevention programs in the local population. A cross-sectional survey was conducted among the elderly patients in a tertiary hospital. A total of 86 patients (n=86) were interviewed. Approximately 23.3% (20 patients) of the elderly had a history of falls over the past 6 months. Majority of the elderly considered falls as a major concern (80 patients, 93%) and is preventable (55 patients, 64%). Patients with a medical condition reported a significantly greater number of falls within the past 6 months (p<0.001). Approximately 69% (59 patients) of the elderly were aware of their medication and associated risk of falls. In patients that were unaware of medication associated risk of falls, 81.5% (22 patients) had a potentially inappropriate medication preferred preventive interventions for medication related falls were related to strength and training programs (37 patients, 43%). The knowledge of falls, medication related falls and intervention strategies in the elderly were minimal.
    MeSH terms: Accidental Falls/prevention & control*; Accidental Falls/statistics & numerical data; Aged; Aged, 80 and over; Cross-Sectional Studies; Female; Humans; Health Knowledge, Attitudes, Practice; Male; Middle Aged; Risk Factors
  4. Subramaniyan V, Shaik S, Bag A, Manavalan G, Chandiran S
    Pak J Pharm Sci, 2018 Mar;31(2):509-516.
    PMID: 29618442
    To determine the ameliorative potential of the active fraction from different extracts of Rumex vesicarius against potassium dichromate and gentamicin induced nephrotoxicity in experimental rats and its possible mechanism of action. Both sex wistar rats were divided into 6 groups (n=6/group) were fed with a control, potassium dichromate and gentamicin supplemented with different extracts at the doses of 200 and 400mg/kg respectively. Oral administration of EERV offered a significant (p<0.01 and p<0.001) dose dependent protection against PD and GN induced nephrotoxicity. Potassium dichromate and gentamicin nephrotoxicity assessed in terms of body weight, kidney weight, creatinine, urea, uric acid, BUN, albumin and total protein. Thus the present study revealed that EERV phytochemical constituents play an important role in protection against kidney damage.
    MeSH terms: Animals; Body Weight/drug effects; Creatinine/blood; Female; Gentamicins/adverse effects*; Kidney/drug effects; Kidney Diseases/chemically induced; Kidney Diseases/prevention & control*; Male; Organ Size/drug effects; Plant Extracts/administration & dosage; Plant Extracts/pharmacology*; Plant Extracts/chemistry; Potassium Dichromate/adverse effects*; Urea/blood; Rats, Wistar; Protective Agents/administration & dosage; Protective Agents/pharmacology; Toxicity Tests, Acute/methods; Rumex/chemistry*
  5. Riahi M, Ang HL, Jones M, Prachasilchai P, Baruteau AE, Promphan W, et al.
    Circ Cardiovasc Interv, 2018 04;11(4):e005923.
    PMID: 29618579 DOI: 10.1161/CIRCINTERVENTIONS.117.005923
    MeSH terms: Adolescent; Adult; Angiography; Bioprosthesis*; Cardiac Catheterization/adverse effects; Cardiac Catheterization/instrumentation*; Cardiac Catheterization/methods; Heart Valve Prosthesis*; Hemodynamics*; Humans; Prosthesis Design; Prosthesis Failure*; Pulmonary Circulation*; Pulmonary Valve/physiopathology; Pulmonary Valve/surgery*; Pulmonary Valve Insufficiency/physiopathology; Pulmonary Valve Insufficiency/surgery*; Tetralogy of Fallot/physiopathology; Tetralogy of Fallot/surgery*; Ventricular Function, Right; Treatment Outcome; Heart Valve Prosthesis Implantation/adverse effects; Heart Valve Prosthesis Implantation/instrumentation*; Heart Valve Prosthesis Implantation/methods; Balloon Valvuloplasty
  6. Lau BT, Nurul-Nadiah-Auni AR, Ng SY, Shuen-Wong N
    Pharm Pract (Granada), 2018 03 23;16(1):1075.
    PMID: 29619135 DOI: 10.18549/PharmPract.2018.01.1075
    Background: Patients' satisfaction is the key parameter to measure the quality of healthcare services. Value added-services (VAS) were introduced to improve the quality of medication deliveries and to reduce the waiting time at outpatient pharmacy.
    Objective: This study aimed to compare the satisfaction levels of patients receiving VAS and traditional counter service (TCS) for prescription refills in Port Dickson Hospital.
    Methods: A single-center, cross-sectional study was conducted in the outpatient pharmacy department of Port Dickson Hospital from 1 March to 30 June 2017. Systematic sampling method was utilized to recruit subjects into the study, except mail pharmacy in which universal sampling method was used. Data collection was done via telephone interviews for both groups.
    Results: There was 104 and 105 in TCS and VAS group respectively. The response rate was 99.5%. Overall, a significant higher total mean satisfaction score in VAS group was observed as compared to TCS group (43.39 versus 40.49, p=0.002). The same finding was observed after confounding factors were controlled (VAS=44.66, 95% CI 43.07:46.24 versus TCS=39.88, 95% CI 38.29:41.46; p<0.001). VAS respondents reported more satisfaction than TCS respondents for both general and technical aspects. Among the VAS offered, mail pharmacy service respondents showed highest total mean satisfaction score, but no significant different was seen between groups (p=0.064).
    Conclusion: VAS respondents were generally more satisfied than TCS respondents for prescription refills. A longitudinal study is necessary to examine the impact of other dimensions and other types of VAS on patients' satisfaction levels.
    Study site: outpatient clinic, Hospital Port Dickson, Negeri Sembilan, Malaysia
    MeSH terms: Adult; Cross-Sectional Studies; Hospitals, District; Humans; Malaysia; Outpatient Clinics, Hospital; Pharmacies; Patient Satisfaction*
  7. Abubakar U, Sulaiman SA, Usman MN, Umar MD
    Pharm Pract (Granada), 2018 03 27;16(1):1152.
    PMID: 29619141 DOI: 10.18549/PharmPract.2018.01.1152
    Background: Recent studies have revealed that pharmacists have interest in conducting research. However, lack of confidence is a major barrier.

    Objective: This study evaluated pharmacists' self-perceived competence and confidence to plan and conduct health-related research.

    Method: This cross sectional study was conducted during the 89th Annual National Conference of the Pharmaceutical Society of Nigeria in November 2016. An adapted questionnaire was validated and administered to 200 pharmacist delegates during the conference.

    Result: Overall, 127 questionnaires were included in the analysis. At least 80% of the pharmacists had previous health-related research experience. Pharmacist's competence and confidence scores were lowest for research skills such as: using software for statistical analysis, choosing and applying appropriate inferential statistical test and method, and outlining detailed statistical plan to be used in data analysis. Highest competence and confidence scores were observed for conception of research idea, literature search and critical appraisal of literature. Pharmacists with previous research experience had higher competence and confidence scores than those with no previous research experience (p<0.05). The only predictor of moderate-to-extreme self-competence and confidence was having at least one journal article publication during the last 5 years.

    Conclusion: Nigerian pharmacists indicated interest to participate in health-related research. However, self-competence and confidence to plan and conduct research were low. This was particularly so for skills related to statistical analysis. Training programs and building of Pharmacy Practice Research Network are recommended to enhance pharmacist's research capacity.

  8. Shapla UM, Solayman M, Alam N, Khalil MI, Gan SH
    Chem Cent J, 2018 Apr 04;12(1):35.
    PMID: 29619623 DOI: 10.1186/s13065-018-0408-3
    An organic compound known as 5-hydroxymethylfurfural (HMF) is formed from reducing sugars in honey and various processed foods in acidic environments when they are heated through the Maillard reaction. In addition to processing, storage conditions affect the formation HMF, and HMF has become a suitable indicator of honey quality. HMF is easily absorbed from food through the gastrointestinal tract and, upon being metabolized into different derivatives, is excreted via urine. In addition to exerting detrimental effects (mutagenic, genotoxic, organotoxic and enzyme inhibitory), HMF, which is converted to a non-excretable, genotoxic compound called 5-sulfoxymethylfurfural, is beneficial to human health by providing antioxidative, anti-allergic, anti-inflammatory, anti-hypoxic, anti-sickling, and anti-hyperuricemic effects. Therefore, HMF is a neo-forming contaminant that draws great attention from scientists. This review compiles updated information regarding HMF formation, detection procedures, mitigation strategies and effects of HMF on honey bees and human health.
  9. Kadivar A, Ibrahim Noordin M, Aditya A, Kamalidehghan B, Davoudi ET, Sedghi R, et al.
    Int J Mol Med, 2018 Jul;42(1):414-424.
    PMID: 29620139 DOI: 10.3892/ijmm.2018.3590
    Imatinib mesylate is an anti‑neoplastic targeted chemotherapeutic agent, which can inhibit tyrosine kinase receptors, including BCR‑ABL, platelet‑derived growth factor receptors (PDGFRs) and c‑Kit. Cellular processes, including differentiation, proliferation and survival are regulated by these receptors. The present study aimed to evaluate the antiproliferative effects of imatinib mesylate, and its effects on apoptotic induction and cell cycle arrest in breast cancer cell lines. In addition, the study aimed to determine whether the effects of this drug were associated with the mRNA and protein expression levels of PDGFR‑β, c‑Kit, and their corresponding ligands PDGF‑BB and stem cell factor (SCF), which may potentially modulate cell survival and proliferation. To assess the antiproliferative effects of imatinib mesylate, an MTS assay was conducted following treatment of cells with 2‑10 µM imatinib mesylate for 96, 120 and 144 h; accordingly the half maximal inhibitory concentration of imatinib mesylate was calculated for each cell line. In addition, the proapoptotic effects and cytostatic activity of imatinib mesylate were investigated. To evaluate the expression of imatinib‑targeted genes, PDGFR‑β, c‑Kit, PDGF‑BB and SCF, under imatinib mesylate treatment, mRNA expression was detected using semi‑quantitative polymerase chain reaction and protein expression was detected by western blot analysis in ZR‑75‑1 and MDA‑MB‑231 breast carcinoma cell lines. Treatment with imatinib mesylate suppressed cell proliferation, which was accompanied by apoptotic induction and cell cycle arrest in the investigated cell lines. In addition, PDGFR‑β, PDGF‑BB, c‑Kit and SCF were expressed in both breast carcinoma cell lines; PDGFR‑β and c‑Kit, as imatinib targets, were downregulated in response to imatinib mesylate treatment. The present results revealed that at least two potential targets of imatinib mesylate were expressed in the two breast carcinoma cell lines studied. In conclusion, the antiproliferative, cytostatic and proapoptotic effects of imatinib mesylate may be the result of a reduction in the expression of c‑Kit and PDGFR tyrosine kinase receptors, thus resulting in suppression of the corresponding ligand PDGF‑BB. Therefore, imatinib mesylate may be considered a promising target therapy for the future treatment of breast cancer.
    MeSH terms: Imatinib Mesylate/pharmacology*; Humans; Mitosis/drug effects; Mitosis/genetics; Gene Expression Regulation, Neoplastic/drug effects; G2 Phase/drug effects; G2 Phase/genetics; Apoptosis/drug effects; Apoptosis/genetics; Proto-Oncogene Proteins c-kit/genetics*; Proto-Oncogene Proteins c-kit/metabolism; Stem Cell Factor/genetics*; Stem Cell Factor/metabolism; Inhibitory Concentration 50; Proto-Oncogene Proteins c-sis/genetics*; Proto-Oncogene Proteins c-sis/metabolism; Receptor, Platelet-Derived Growth Factor beta/genetics*; Receptor, Platelet-Derived Growth Factor beta/metabolism; Gene Expression Profiling; Cell Line, Tumor; Cell Proliferation/drug effects; Cell Proliferation/genetics; Cell Cycle Checkpoints/drug effects; Cell Cycle Checkpoints/genetics
  10. Chowchaikong N, Nilwarangkoon S, Laphookhieo S, Tanunyutthawongse C, Watanapokasin R
    Int J Oncol, 2018 Jun;52(6):2031-2040.
    PMID: 29620273 DOI: 10.3892/ijo.2018.4353
    Colorectal cancer, which is the third most common type of cancer diagnosed in both men and women, is the leading cause of cancer-related deaths worldwide. Cowanin is a pure compound extracted from Garcinia cowa Roxb., a tree species present in Thailand, Malaysia and Myanmar. The crude extract has been demonstrated to have antitumor activity, inflammation induction, antibacterial activity, anti-inflammatory activity and antimalarial activity. In the present study, the effects of cowanin on apoptosis induction and on the apoptosis-related and mitogen-activated protein kinase (MAPK) pathways were investigated in the LoVo human colorectal cancer cell line. The cytotoxicity of cowanin in LoVo cells was determined by MTT assay. Hoechst 33342 and JC‑1 staining were used to determine nuclear morphological changes and mitochondrial membrane potential, respectively. The expression levels of BCL2 apoptosis regulator (Bcl‑2) family, MAPK and AKT serine/threonine kinase 1 (Akt) pathway proteins following cowanin treatment were determined by western blot analysis. The results demonstrated that cowanin inhibited cell proliferation and induced cell death via the apoptosis pathway. Cowanin treatment increased BCL2 associated X (Bax) and decreased Bcl‑2 expression. In addition, cowanin activated caspase‑9, -7 and poly-ADP-ribose-polymerase expression. Furthermore, cowanin decreased the levels of phosphorylated extracellular signal-regulated kinase (p‑ERK), p‑Akt, p‑3‑phosphoinositide‑dependent protein kinase‑1, while it increased p‑p38 expression, thus resulting in the induction of apoptosis. In conclusion, cowanin inhibited cell proliferation and induced apoptosis of LoVo cells via the MAPK and Akt signaling pathways. Notably, inhibition of p38 by using a p38 inhibitor (SB203580) prevented the cowanin-induced apoptosis in LoVo cells. These results suggested that cowanin may be a potential candidate for the treatment of colorectal cancer and provided important information on the molecular mechanisms underlying its antitumor activity.
    MeSH terms: Cell Cycle/drug effects; Cell Survival/drug effects; Humans; Imidazoles/pharmacology*; Poly(ADP-ribose) Polymerases/metabolism; Pyridines/pharmacology*; Tannins/pharmacology*; Tannins/chemistry; Colorectal Neoplasms/drug therapy; Colorectal Neoplasms/metabolism*; Gene Expression Regulation, Neoplastic/drug effects; MAP Kinase Signaling System/drug effects; Cell Line, Tumor; p38 Mitogen-Activated Protein Kinases/antagonists & inhibitors; p38 Mitogen-Activated Protein Kinases/metabolism*; Cell Proliferation/drug effects; Proto-Oncogene Proteins c-akt/metabolism; Caspase 7/metabolism; Caspase 9/metabolism
  11. Chellappan DK, Ng ZY, Wong JY, Hsu A, Wark P, Hansbro N, et al.
    Future Med Chem, 2018 04 01;10(8):839-844.
    PMID: 29620416 DOI: 10.4155/fmc-2017-0245
    Several vesicular systems loaded with curcumin have found their way in the therapeutic applications of several diseases, primarily acting through their immunological pathways. Such systems use particles at a nanoscale range, bringing about their intended use through a range of complex mechanisms. Apart from delivering drug substances into target tissues, these vesicular systems also effectively overcome problems like insolubility and unequal drug distribution. Several mechanisms are explored lately by different workers, and interest over vesicular curcumin has been renewed in the past decade. This commentary discusses several immunological targets in which curcumin is employed in a vesicular form.
    MeSH terms: Analgesics/administration & dosage*; Anti-Inflammatory Agents/administration & dosage*; Antineoplastic Agents/administration & dosage*; Curcumin/administration & dosage*; Drug Carriers/chemistry*; Humans; Liposomes/chemistry; Solubility; Drug Delivery Systems; Nanoparticles/chemistry
  12. Maddirevula S, Alsahli S, Alhabeeb L, Patel N, Alzahrani F, Shamseldin HE, et al.
    Genet Med, 2018 12;20(12):1609-1616.
    PMID: 29620724 DOI: 10.1038/gim.2018.50
    PURPOSE: To describe our experience with a large cohort (411 patients from 288 families) of various forms of skeletal dysplasia who were molecularly characterized.

    METHODS: Detailed phenotyping and next-generation sequencing (panel and exome).

    RESULTS: Our analysis revealed 224 pathogenic/likely pathogenic variants (54 (24%) of which are novel) in 123 genes with established or tentative links to skeletal dysplasia. In addition, we propose 5 genes as candidate disease genes with suggestive biological links (WNT3A, SUCO, RIN1, DIP2C, and PAN2). Phenotypically, we note that our cohort spans 36 established phenotypic categories by the International Skeletal Dysplasia Nosology, as well as 18 novel skeletal dysplasia phenotypes that could not be classified under these categories, e.g., the novel C3orf17-related skeletal dysplasia. We also describe novel phenotypic aspects of well-known disease genes, e.g., PGAP3-related Toriello-Carey syndrome-like phenotype. We note a strong founder effect for many genes in our cohort, which allowed us to calculate a minimum disease burden for the autosomal recessive forms of skeletal dysplasia in our population (7.16E-04), which is much higher than the global average.

    CONCLUSION: By expanding the phenotypic, allelic, and locus heterogeneity of skeletal dysplasia in humans, we hope our study will improve the diagnostic rate of patients with these conditions.

    MeSH terms: Alleles; Blood Proteins/genetics; Carboxylic Ester Hydrolases; Exoribonucleases/genetics; Female; Fetal Proteins/genetics; Genetics, Population; Humans; Male; Membrane Proteins/genetics; Musculoskeletal Abnormalities/classification; Musculoskeletal Abnormalities/genetics*; Musculoskeletal Abnormalities/pathology; Neoplasm Proteins/genetics; Phenotype; Receptors, Cell Surface/genetics; Cohort Studies; Oncogene Proteins/genetics; Founder Effect; Genetic Heterogeneity*; Genetic Predisposition to Disease*; Intracellular Signaling Peptides and Proteins/genetics; High-Throughput Nucleotide Sequencing; Exome/genetics*; Wnt3A Protein/genetics
  13. Mahakkanukrauh P, Sinthubua A, Das S
    Gastroenterology, 2018 05;154(6):1852.
    PMID: 29621516 DOI: 10.1053/j.gastro.2017.12.048
    MeSH terms: Colitis, Ulcerative*; Colorectal Neoplasms; Biomarkers; MicroRNAs*
  14. Zeng W, Halasa-Rappel YA, Baurin N, Coudeville L, Shepard DS
    Vaccine, 2018 01 08;36(3):413-420.
    PMID: 29229427 DOI: 10.1016/j.vaccine.2017.11.064
    Following publication of results from two phase-3 clinical trials in 10 countries or territories, endemic countries began licensing the first dengue vaccine in 2015. Using a published mathematical model, we evaluated the cost-effectiveness of dengue vaccination in populations similar to those at the trial sites in those same Latin American and Asian countries. Our main scenarios (30-year horizon, 80% coverage) entailed 3-dose routine vaccinations costing US$20/dose beginning at age 9, potentially supplemented by catch-up programs of 4- or 8-year cohorts. We obtained illness costs per case, dengue mortality, vaccine wastage, and vaccine administration costs from the literature. We estimated that routine vaccination would reduce yearly direct and indirect illness cost per capita by 22% (from US$10.51 to US$8.17) in the Latin American countries and by 23% (from US$5.78 to US$4.44) in the Asian countries. Using a health system perspective, the incremental cost-effectiveness ratio (ICER) averaged US$4,216/disability-adjusted life year (DALY) averted in the five Latin American countries (range: US$666/DALY in Puerto Rico to US$5,865/DALY in Mexico). In the five Asian countries, the ICER averaged US$3,751/DALY (range: US$1,935/DALY in Malaysia to US$5,101/DALY in the Philippines). From a health system perspective, the vaccine proved to be highly cost effective (ICER under one times the per capita GDP) in seven countries and cost effective (ICER 1-3 times the per capita GDP) in the remaining three countries. From a societal perspective, routine vaccination proved cost-saving in three countries. Including catch-up campaigns gave similar ICERs. Thus, this vaccine could have a favorable economic value in sites similar to those in the trials.
    MeSH terms: Adolescent; Asia/epidemiology; Child; Cost-Benefit Analysis*; Dengue/epidemiology*; Dengue/prevention & control*; Humans; Latin America/epidemiology; Models, Theoretical; Vaccination/economics*; Endemic Diseases/prevention & control*; Dengue Vaccines/administration & dosage; Dengue Vaccines/economics*
  15. Syed A, Azhar S, Raza MM, Saeed H, Jamshed SQ
    Pharmacy (Basel), 2018 Mar 31;6(2).
    PMID: 29614725 DOI: 10.3390/pharmacy6020029
    OBJECTIVES: Pharmacovigilance in Pakistan needs robust preference in terms of implementation and consistent movement of structured approaches. The objective of this study is to explore the knowledge, attitude and barriers towards adverse drug reaction (ADR) reporting among physicians and pharmacists and to explore the encouraging factors of ADR reporting.

    METHODS: The current research was a cross-sectional study design in which a pre-validated questionnaire was administered to physicians and pharmacists in Abbottabad, Pakistan. The study was conducted for two months from January 2016 to February 2016.

    RESULTS: A total of 194 physicians and pharmacists responded with a response rate of 35.3%. All the respondents either strongly agreed or agreed that ADRs reporting is a part of their duty. Half of the respondents agreed that monitoring of drug safety is important. Around three quarters of respondents (74.2%) stated that they did not report ADRs due to unavailability of reporting forms while 70% cited lack of a proper pharmacovigilance center as one of the key barriers. Half of the respondents (52.2%) did not report due to their insufficient knowledge. A large majority (81.8%) said that they would report ADRs if there is pharmacovigilance center. On the point of incentives, opinion seems to be divided. Slightly less than half (47.8%) cited their wish to have few incentives while the remaining 52.2% either preferred to be neutral or disagreed.

    CONCLUSION: Based on the study findings, barriers were mostly related to general unfamiliarity with ADRs reporting guidelines and the non-existence of a pharmacovigilance center. It is highlighted that the regulatory body should carve a niche for a properly functional pharmacovigilance center and initiate educational programs for strengthening knowledge and attitudes towards ADR reporting.

  16. Ahmad Rizal NFA, Ibrahim MF, Zakaria MR, Kamal Bahrin E, Abd-Aziz S, Hassan MA
    Molecules, 2018 Apr 02;23(4).
    PMID: 29614823 DOI: 10.3390/molecules23040811
    The combination of superheated steam (SHS) with ligninolytic enzyme laccase pretreatment together with size reduction was conducted in order to enhance the enzymatic hydrolysis of oil palm biomass into glucose. The oil palm empty fruit bunch (OPEFB) and oil palm mesocarp fiber (OPMF) were pretreated with SHS and ground using a hammer mill to sizes of 2, 1, 0.5 and 0.25 mm before pretreatment using laccase to remove lignin. This study showed that reduction of size from raw to 0.25 mm plays important role in lignin degradation by laccase that removed 38.7% and 39.6% of the lignin from OPEFB and OPMF, respectively. The subsequent saccharification process of these pretreated OPEFB and OPMF generates glucose yields of 71.5% and 63.0%, which represent a 4.6 and 4.8-fold increase, respectively, as compared to untreated samples. This study showed that the combination of SHS with laccase pretreatment together with size reduction could enhance the glucose yield.
    MeSH terms: Lignin/metabolism*; Biomass; Arecaceae/metabolism*; Laccase/metabolism*
  17. Agatonovic-Kustrin S, Kustrin E, Angove MJ, Morton DW
    J Chromatogr A, 2018 May 18;1550:57-62.
    PMID: 29615323 DOI: 10.1016/j.chroma.2018.03.054
    The interaction of bioactive compounds from ethanolic extracts of selected marine algae samples, separated on chromatographic plates, with nitric/nitrous acid was investigated. The nature of bioactive compounds in the marine algae extracts was characterised using UV absorption spectra before and after reaction with diluted nitric acid, and from the characteristic colour reaction after derivatization with anisaldehyde. It was found that diterpenes from Dictyota dichotoma, an edible brown algae, and sterols from green algae Caulerpa brachypus, bind nitric oxide and may act as a nitric oxide carrier. Although the carotenoid fucoxanthin, found in all brown marine algae also binds nitric oxide, the bonds between nitrogen and the fucoxanthin molecule are much stronger. Further studies are required to evaluate the effects of diterpenes from Dictyota dichotoma and sterols from green algae Caulerpa brachypus to see if they have beneficial cardiovascular effects. The method reported here should prove useful in screening large numbers of algae species for compounds with cardiovascular activity.
    MeSH terms: Phaeophyta/chemistry*; Chlorophyta/chemistry*; Cardiotonic Agents/analysis*; Chromatography, Thin Layer; Diterpenes/analysis; Drug Evaluation, Preclinical/methods*; Spectrophotometry, Ultraviolet; Xanthophylls/analysis; Aquatic Organisms/chemistry*
  18. Eng JY, Moy FM, Bulgiba A, Rampal S
    J Acad Nutr Diet, 2018 07;118(7):1249-1262.e3.
    PMID: 29615325 DOI: 10.1016/j.jand.2018.01.014
    BACKGROUND: Dietary pattern analysis is a complementary method to nutrient analysis in evaluating overall diet-disease hypotheses. Although studies have been conducted to derive dietary patterns among Malaysians, their consistency across subgroups has not been examined.

    OBJECTIVE: The study aimed to derive dietary patterns empirically and to examine the consistency and generalizability of patterns across sex, ethnicity, and urban status in a working population.

    DESIGN: This was a cross-sectional study using data from the Clustering of Lifestyle Risk Factors and Understanding its Association with Stress on Health and Well-Being among School Teachers in Malaysia study collected between August 2014 and November 2015. Dietary intake was assessed using a food frequency questionnaire, and dietary patterns were derived using factor analysis.

    PARTICIPANTS/SETTING: Participants were teachers from selected public schools from three states in Peninsular Malaysia (n=4,618).

    MAIN OUTCOME MEASURES: Dietary patterns derived using factor analysis.

    STATISTICAL ANALYSES PERFORMED: Separate factor analysis was conducted by sex, ethnicity, and urban status to identify dietary patterns. Eigenvalue >2, scree plot, Velicer's minimum average partial analysis, and Horn's parallel analysis were used to determine the number of factors to retain. The interpretability of each dietary pattern was evaluated. The consistency and generalizability of dietary patterns across subgroups were assessed using the Tucker congruence coefficient.

    RESULTS: There was no subgroup-specific dietary pattern found. Thus, dietary patterns were derived using the pooled sample in the final model. Two dietary patterns (Western and Prudent) were derived. The Western dietary pattern explained 15.4% of total variance, characterized by high intakes of refined grains, animal-based foods, added fat, and sugar-sweetened beverages as well as fast food. The Prudent dietary pattern explained 11.1% of total variance and was loaded with pulses, legumes, vegetables, and fruits.

    CONCLUSIONS: The derived Western and Prudent dietary patterns were consistent and generalizable across subgroups of sex, ethnicity, and urban status. Further research is needed to explore associations between these dietary patterns and chronic diseases.

    MeSH terms: Adult; Cross-Sectional Studies; Diet/ethnology; Diet/methods; Diet/statistics & numerical data*; Diet Surveys/methods; Diet Surveys/statistics & numerical data*; Factor Analysis, Statistical; Female; Humans; Malaysia; Male; Middle Aged; Risk Factors; Urban Population/statistics & numerical data; Reproducibility of Results; Nutrition Assessment; Cluster Analysis; Occupational Health/statistics & numerical data*; Diet, Western/ethnology; Diet, Western/statistics & numerical data*; School Teachers/statistics & numerical data*
  19. Ullah I, Subhan F, Alam J, Shahid M, Ayaz M
    Front Pharmacol, 2018;9:231.
    PMID: 29615907 DOI: 10.3389/fphar.2018.00231
    Cannabis sativa
    (CS, familyCannabinaceae) has been reported for its anti-emetic activity against cancer chemotherapy-induced emesis in animal models and in clinics. The current study was designed to investigateCSfor potential effectiveness to attenuate cisplatin-induced vomiting in healthy pigeons and to study the impact on neurotransmitters involved centrally and peripherally in the act of vomiting. High-performance liquid chromatography system coupled with electrochemical detector was used for the quantification of neurotransmitters 5-hydroxytryptamine (5HT), dopamine (DA) and their metabolites; Di-hydroxy Phenyl Acetic acid (Dopac), Homovanillic acid (HVA), and 5-hydroxy indole acetic acid (5HIAA) centrally in specific brain areas (area postrema and brain stem) while, peripherally in small intestine. Cisplatin (7 mg/kg i.v.) induce emesis without lethality across the 24 h observation period.CShexane fraction (CS-HexFr; 10 mg/kg) attenuated cisplatin-induced emesis ∼ 65.85% (P< 0.05); the reference anti-emetic drug, metoclopramide (MCP; 30 mg/kg), produced ∼43.90% reduction (P< 0.05). At acute time point (3rdh), CS-HexFr decreased (P< 0.001) the concentration of 5HT and 5HIAA in the area postrema, brain stem and intestine, while at 18thh (delayed time point) CS-HexFr attenuated (P< 0.001) the upsurge of 5HT caused by cisplatin in the brain stem and intestine and dopamine in the area postrema.CS-HexFr treatment alone did not alter the basal neurotransmitters and their metabolites in the brain areas and intestine except 5HIAA and HVA, which were decreased significantly. In conclusion the anti-emetic effect ofCS-HexFr is mediated by anti-serotonergic and anti-dopaminergic components in a blended manner at the two different time points, i.e., 3rdand 18thh in pigeons.
    MeSH terms: Animals; Antiemetics; Cannabis; Chromatography, High Pressure Liquid; Cisplatin; Dopamine; Homovanillic Acid; Hydroxyindoleacetic Acid; Metoclopramide; Neoplasms; Columbidae; Serotonin; Vomiting; 3,4-Dihydroxyphenylacetic Acid; Area Postrema
  20. Yong YK, Saeidi A, Tan HY, Rosmawati M, Enström PF, Batran RA, et al.
    Front Immunol, 2018;9:472.
    PMID: 29616020 DOI: 10.3389/fimmu.2018.00472
    Mucosal-associated invariant T (MAIT) cells, defined as CD161++TCR iVα7.2+ T cells, play an important role in the innate defense against bacterial infections, and their functionality is impaired in chronic viral infections. Here, we investigated the frequency and functional role of MAIT cells in chronic hepatitis B virus (HBV) infection. The peripheral CD3+CD161++TCR iVα7.2+ MAIT cells in chronic HBV-infected patients and healthy controls were phenotypically characterized based on CD57, PD-1, TIM-3, and CTLA-4, as well as HLA-DR and CD38 expression. The frequency of MAIT cells was significantly decreased among chronic HBV-infected individuals as compared to controls. Expression of CD57, PD-1, CTLA-4, as well as HLA-DR and CD38 on MAIT cells was significantly elevated in chronic HBV-infected individuals relative to controls. The percentage of T cell receptor (TCR) iVα7.2+ CD161+ MAIT cells did not correlate with HBV viral load but inversely with HLA-DR on CD4+ T cells and MAIT cells and with CD57 on CD8+ T cells suggesting that decrease of MAIT cells may not be attributed to direct infection by HBV but driven by HBV-induced chronic immune activation. The percentage and expression levels of PD-1 as well as CTLA-4 on MAIT cells inversely correlated with plasma HBV-DNA levels, which may suggest either a role for MAIT cells in the control of HBV infection or the effect of HBV replication in the liver on MAIT cell phenotype. We report that decrease of TCR iVα7.2+ MAIT cells in the peripheral blood and their functions were seemingly impaired in chronic HBV-infected patients likely because of the increased expression of PD-1.
    MeSH terms: DNA, Viral; Hepatitis B; Hepatitis B virus; HLA-DR Antigens; Humans; Receptors, Antigen, T-Cell; CD4-Positive T-Lymphocytes; Receptor-CD3 Complex, Antigen, T-Cell; CD8-Positive T-Lymphocytes; Viral Load; Hepatitis B, Chronic; CTLA-4 Antigen; Programmed Cell Death 1 Receptor; Mucosal-Associated Invariant T Cells; Hepatitis A Virus Cellular Receptor 2
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