Browse publications by year: 2018

  1. Sayem ASM, Giribabu N, Karim K, Si LK, Muniandy S, Salleh N
    Biomed Pharmacother, 2018 Apr;100:132-141.
    PMID: 29428660 DOI: 10.1016/j.biopha.2018.02.008
    Sex-steroids play important role in modulating uterine functions. We hypothesized that these hormones affect expression of proteins in the uterus related to thyroid hormone action. Therefore, changes in expression levels of receptors for thyroid hormone (TRα-1 and TRβ-1), thyroid stimulating hormone (TSHR), vitamin D (VDR) and retinoid acid (RAR) as well as extracellular signal-regulated kinase (ERK1/2) in uterus were investigated under sex-steroid influence.

    METHODS: Two rat models were used: (i) ovariectomised, sex-steroid replaced and (ii) intact, at different phases of oestrous cycle. A day after completion of sex-steroid treatment or following identification of oestrous cycle phases, rats were sacrificed and expression and distribution of these proteins in uterus were identified by Western blotting and immunohistochemistry, respectively.

    RESULTS: Expression of TRα-1, TRβ-1, TSHR, VDR, RAR and ERK1/2 in uterus was higher following estradiol (E2) treatment and at estrus phase of oestrous cycle when E2levels were high. A relatively lower expression was observed following progesterone (P) treatment and at diestrus phases of oestrous cycle when P levels were high. Under E2influence, TRα, TRβ, TSHR, VDR, RAR and ERK1/2 were distributed in luminal and glandular epithelia while under P influence, TSHR, VDR abn RAR were distributed in the stroma.

    CONCLUSIONS: Differential expression and distribution of TRα-1, TRβ-1, TSHR, VDR, RAR and ERK1/2 in different uterine compartments could explain differential action of thyroid hormone, TSH, vitamin D, and retinoic acid in uterus under different sex-steroid conditions.

    MeSH terms: Animals; Diestrus; Estradiol; Estrus; Female; Immunohistochemistry; Progesterone; Gonadal Steroid Hormones; Thyrotropin; Tretinoin; Vitamin D; MAP Kinase Signaling System; Estrous Cycle; Thyroid Hormone Receptors beta; Extracellular Signal-Regulated MAP Kinases; Mitogen-Activated Protein Kinase 3; Rats
  2. Mat Lazim N, Abdullah K, Karakullukcu B, Tan IB
    PMID: 29428959 DOI: 10.1159/000486371
    INTRODUCTION: The concept of neck dissection (ND) in the management armamentarium of head and neck squamous cell carcinoma has evolved throughout the years. Nowadays, ND becomes more functional.

    METHODOLOGY: A retrospective study of 865 patients was performed at Netherlands Cancer Institute-Antoni Van Leeuwenhoek Hospital to investigate the feasibility of selective ND (SND). All patients with squamous cell carcinoma of the pharynx and larynx who received primary radiation and underwent salvage ND were included in the study.

    RESULT: A total of 29 NDs were analyzed. In 17 neck sides, viable metastases were found (58%), whereas in the other 12 specimens there were no viable metastases. In 16 of the 17 necks (94%), the metastases were located either in level II, III, or IV or in a combination of these 3 levels. Level V was involved in only 1 case (6%).

    CONCLUSION: It is well justified to perform a salvage SND (levels II, III, and IV) for pharyngeal and laryngeal carcinoma after primary radiation. In carefully selected cases of supraglottic and oropharyngeal carcinoma, a superselective ND also appears as an efficient option.

    MeSH terms: Adult; Aged; Carcinoma, Squamous Cell/radiotherapy; Carcinoma, Squamous Cell/surgery*; Feasibility Studies; Head and Neck Neoplasms/radiotherapy; Head and Neck Neoplasms/surgery*; Humans; Laryngeal Neoplasms/radiotherapy; Laryngeal Neoplasms/surgery*; Larynx/pathology; Middle Aged; Neck/pathology; Neck/surgery; Neoplasm Recurrence, Local; Netherlands; Pharyngeal Neoplasms/radiotherapy; Pharyngeal Neoplasms/surgery*; Pharynx/pathology; Retrospective Studies; Salvage Therapy/methods; Treatment Outcome; Neck Dissection/methods*
  3. Idris H, Nouioui I, Pathom-Aree W, Castro JF, Bull AT, Andrews BA, et al.
    Antonie Van Leeuwenhoek, 2018 Sep;111(9):1523-1533.
    PMID: 29428970 DOI: 10.1007/s10482-018-1039-3
    The taxonomic position of a novel Amycolatopsis strain isolated from a high altitude Atacama Desert subsurface soil was established using a polyphasic approach. The strain, isolate H5T, was shown to have chemical properties typical of members of the genus Amycolatopsis such as meso-diaminopimelic acid as the diamino acid in the cell wall peptidoglycan, arabinose and galactose as diagnostic sugars and MK-9(H4) as the predominant isoprenologue. It also has cultural and morphological properties consistent with its classification in the genus, notably the formation of branching substrate hyphae which fragment into rod-like elements. 16S rRNA gene sequence analyses showed that the strain is closely related to the type strain of Amycolatopsis mediterranei but could be distinguished from this and other related Amycolatopsis strains using a broad range of phenotypic properties. It was separated readily from the type strain of Amycolatopsis balhymycina, its near phylogenetic neighbour, based on multi-locus sequence data, by low average nucleotide identity (92.9%) and in silico DNA/DNA relatedness values (51.3%) calculated from draft genome assemblies. Consequently, the strain is considered to represent a novel species of Amycolatopsis for which the name Amycolatopsis vastitatis sp. nov. is proposed. The type strain is H5T (= NCIMB 14970T = NRRL B-65279T).
    MeSH terms: Actinomycetales/classification*; Actinomycetales/genetics*; Actinomycetales/growth & development; Actinomycetales/chemistry; Altitude*; Base Composition; Cell Wall/chemistry; Chile; Desert Climate; Diaminopimelic Acid/chemistry; DNA, Bacterial/genetics; Fatty Acids/metabolism; Nucleic Acid Hybridization; Peptidoglycan/chemistry; Phenotype; Phylogeny*; RNA, Ribosomal, 16S/genetics; Soil Microbiology*; Genome, Bacterial/genetics; Hyphae/ultrastructure; Carbohydrate Metabolism
  4. Gurjar AS, Darekar MN, Yeong KY, Ooi L
    Bioorg Med Chem, 2018 05 01;26(8):1511-1522.
    PMID: 29429576 DOI: 10.1016/j.bmc.2018.01.029
    Alzheimer's disease (AD) is a progressive neurodegenerative disorder with multiple factors associated with its pathogenesis. Our strategy against AD involves design of multi-targeted 2-substituted-4,5-diphenyl-1H-imidazole analogues which can interact and inhibit AChE, thereby, increasing the synaptic availability of ACh, inhibit BuChE, relieve induced oxidative stress and confer a neuroprotective role. Molecular docking was employed to study interactions within the AChE active site. In silico ADME study was performed to estimate pharmacokinetic parameters. Based on computational studies, some analogues were synthesized and subjected to pharmacological evaluation involving antioxidant activity, toxicity and memory model studies in animals followed by detailed mechanistic in vitro cholinesterase inhibition study. Amongst the series, analogue 13 and 20 are the most promising multi-targeted candidates which can potentially increase memory, decrease free radical levels and protect neurons against cognitive deficit.
    MeSH terms: Acetylcholinesterase/metabolism*; Alzheimer Disease/drug therapy*; Alzheimer Disease/metabolism; Animals; Butyrylcholinesterase/metabolism*; Cholinesterase Inhibitors/chemical synthesis; Cholinesterase Inhibitors/pharmacology*; Cholinesterase Inhibitors/chemistry; Disease Models, Animal; Dose-Response Relationship, Drug; Electrophorus; Female; Horses; Imidazoles/chemical synthesis; Imidazoles/pharmacology*; Imidazoles/chemistry; Male; Memory Disorders/drug therapy; Memory Disorders/metabolism; Structure-Activity Relationship; Molecular Structure; Neuroprotective Agents/chemical synthesis; Neuroprotective Agents/pharmacology*; Neuroprotective Agents/chemistry; Maze Learning/drug effects; Mice
  5. Manogaran M, Shukor MY, Yasid NA, Khalil KA, Ahmad SA
    3 Biotech, 2018 Feb;8(2):108.
    PMID: 29430369 DOI: 10.1007/s13205-018-1123-4
    The herbicide glyphosate is often used to control weeds in agricultural lands. However, despite its ability to effectively kill weeds at low cost, health problems are still reported due to its toxicity level. The removal of glyphosate from the environment is usually done by microbiological process since chemical process of degradation is ineffective due to the presence of highly stable bonds. Therefore, finding glyphosate-degrading microorganisms in the soil of interest is crucial to remediate this glyphosate.Burkholderia vietnamiensisstrain AQ5-12 was found to have glyphosate-degrading ability. Optimisation of biodegradation condition was carried out utilising one factor at a time (OFAT) and response surface methodology (RSM). Five parameters including carbon and nitrogen source, pH, temperature and glyphosate concentration were optimised. Based on OFAT result, glyphosate degradation was observed to be optimum at fructose concentration of 6, 0.5 g/L ammonia sulphate, pH 6.5, temperature of 32 °C and glyphosate concentration at 100 ppm. Meanwhile, RSM resulted in a better degradation with 92.32% of 100 ppm glyphosate compared to OFAT. The bacterium was seen to tolerate up to 500 ppm glyphosate while increasing concentration results in reduced degradation and bacterial growth rate.
    MeSH terms: Ammonia; Biodegradation, Environmental; Carbon; Fructose; Glycine; Herbicides; Microbiological Phenomena; Nitrogen; Soil; Sulfates; Temperature; Burkholderia; Chemical Phenomena; Plant Weeds
  6. Purayil FT, Robert GA, Gothandam KM, Kurup SS, Subramaniam S, Cheruth AJ
    3 Biotech, 2018 Feb;8(2):109.
    PMID: 29430370 DOI: 10.1007/s13205-018-1108-3
    Nine (9) different date palm (Phoenix dactylifera L.) cultivars from UAE, which differ in their flower timings were selected to determine the polymorphism and genetic relationship between these cultivars. Hereditary differences and interrelationships were assessed utilizing inter-simple sequence repeat (ISSR) and directed amplification of minisatellite DNA region (DAMD) primers. Analysis on eight DAMD and five ISSR markers produced total of 113 amplicon including 99 polymorphic and 14 monomorphic alleles with a polymorphic percentage of 85.45. The average polymorphic information content for the two-marker system was almost similar (DAMD, 0.445 and ISSR, 0.459). UPGMA based clustering of DAMD and ISSR revealed that mid-season cultivars, Mkh (Khlas) and MB (Barhee) grouped together to form a subcluster in both the marker systems. The genetic similarity analysis followed by clustering of the cumulative data from the DAMD and ISSR resulted in two major clusters with two early-season cultivars (ENg and Ekn), two mid-season cultivars (MKh and MB) and one late-season cultivar (Lkhs) in cluster 1, cluster 2 includes two late-season cultivars, one early-season cultivar and one mid-season cultivar. The cluster analysis of both DAMD and ISSR marker revealed that, the patterns of variation between some of the tested cultivars were similar in both DNA marker systems. Hence, the present study signifies the applicability of DAMD and ISSR marker system in detecting genetic diversity of date palm cultivars flowering at different seasons. This may facilitate the conservation and improvement of date palm cultivars in the future.
    MeSH terms: Alleles; DNA; Genetic Markers; Genetic Testing; Polymorphism, Genetic; Seasons; Cluster Analysis; DNA Primers; Minisatellite Repeats; Microsatellite Repeats; Flowers; Phoeniceae
  7. Manogaran M, Ahmad SA, Yasid NA, Yakasai HM, Shukor MY
    3 Biotech, 2018 Feb;8(2):117.
    PMID: 29430378 DOI: 10.1007/s13205-018-1141-2
    In this novel study, we report on the use of two molybdenum-reducing bacteria with the ability to utilise the herbicide glyphosate as the phosphorus source. The bacteria reduced sodium molybdate to molybdenum blue (Mo-blue), a colloidal and insoluble product, which is less toxic. The characterisation of the molybdenum-reducing bacteria was carried out using resting cells immersed in low-phosphate molybdenum media. Two glyphosate-degrading bacteria, namelyBurkholderia vietnamiensisAQ5-12 andBurkholderiasp. AQ5-13, were able to use glyphosate as a phosphorous source to support molybdenum reduction to Mo-blue. The bacteria optimally reduced molybdenum between the pHs of 6.25 and 8. The optimum concentrations of molybdate for strainBurkholderia vietnamiensis strainAQ5-12 was observed to be between 40 and 60 mM, while forBurkholderiasp. AQ5-13, the optimum molybdate concentration occurred between 40 and 50 mM. Furthermore, 5 mM of phosphate was seen as the optimum concentration supporting molybdenum reduction for both bacteria. The optimum temperature aiding Mo-blue formation ranged from 30 to 40 °C forBurkholderia vietnamiensis strainAQ5-12, whereas forBurkholderiasp. AQ5-13, the range was from 35 to 40 °C. Glucose was the best electron donor for supporting molybdate reduction, followed by sucrose, fructose and galactose for both strains. Ammonium sulphate was the best nitrogen source in supporting molybdenum reduction. Interestingly, increasing the glyphosate concentrations beyond 100 and 300 ppm forBurkholderia vietnamiensis strainAQ5-12 andBurkholderiasp. AQ5-13, respectively, significantly inhibited molybdenum reduction. The ability of these bacteria to reduce molybdenum while degrading glyphosate is a useful process for the bioremediation of both toxicants.
    MeSH terms: Ammonium Sulfate; Biodegradation, Environmental; Fructose; Galactose; Glucose; Molybdenum; Nitrogen; Phosphates; Phosphorus; Sucrose; Temperature
  8. Nordin N, Majid NA, Othman R, Omer FAA, Nasharuddin MNA, Hashim NM
    Apoptosis, 2018 02;23(2):152-169.
    PMID: 29430581 DOI: 10.1007/s10495-018-1447-x
    Plagioneurin B belongs to acetogenin group has well-established class of compounds. Acetogenin group has attracted worldwide attention in the past few years due their biological abilities as inhibitors for several types of tumour cells. Plagioneurin B was isolated via conventional chromatography and tested for thorough mechanistic apoptosis activity on human ovarian cancer cells (CAOV-3). Its structure was also docked at several possible targets using Autodock tools software. Our findings showed that plagioneurin B successfully inhibits the growth of CAOV-3 cells at IC50 of 0.62 µM. The existence of apoptotic bodies, cell membrane blebbing and chromatin condensation indicated the hallmark of apoptosis. Increase of Annexin V-FITC bound to phosphatidylserine confirmed the apoptosis induction in the cells. The apoptosis event was triggered through the extrinsic and intrinsic pathways via activation of caspases 8 and 9, respectively. Stimulation of caspase 3 and the presence of DNA ladder suggested downstream apoptotic signalling were initiated. Further confirmation of apoptosis was conducted at the molecular levels where up-regulation in Bax, as well as down-regulation of Bcl-2, Hsp-70 and survivin were observed. Plagioneurin B was also seen to arrest CAOV-3 cells cycle at the G2/M phase. Docking simulation of plagioneurin B with CD95 demonstrated that the high binding affinity and hydrogen bonds formation may explain the capability of plagioneurin B to trigger apoptosis. This study is therefore importance in finding the effective compound that may offer an alternative drug for ovarian cancer treatment.
    MeSH terms: Antineoplastic Agents, Phytogenic/isolation & purification; Antineoplastic Agents, Phytogenic/pharmacology*; Female; Humans; Ovarian Neoplasms/drug therapy; Ovarian Neoplasms/genetics; Ovarian Neoplasms/metabolism; Ovarian Neoplasms/physiopathology*; Plant Extracts/isolation & purification; Plant Extracts/pharmacology*; Signal Transduction/drug effects*; Apoptosis/drug effects*; Angiosperms/chemistry*; Cell Line, Tumor; Caspase 8/genetics; Caspase 8/metabolism; Caspase 9/genetics; Caspase 9/metabolism; Acetogenins/pharmacology*; Cell Cycle Checkpoints/drug effects*
  9. Hussin EOD, Wong LP, Chong MC, Subramanian P
    Int Nurs Rev, 2018 Jun;65(2):200-208.
    PMID: 29430644 DOI: 10.1111/inr.12428
    AIM: To examine the factors associated with nurses' perceptions of the quality of end-of-life care.

    BACKGROUND: With increasing demand for hospitals to provide end-of-life care, the low quality of palliative care provided in hospital settings is an issue of growing concern in developing countries. Most dying patients receive their care from general nurses, irrespective of the nurses' specialty or level of training.

    METHOD: A structured cross-sectional questionnaire survey was conducted of 553 nurses working at a teaching hospital in Malaysia.

    RESULTS: The mean scores for nurses' knowledge about end-of-life care, their attitudes towards end-of-life care and the perceived quality of end-of-life care were low. The factors identified as significantly associated with the quality of end-of-life care were nurses' levels of knowledge and their attitudes towards end-of-life care.

    DISCUSSION: Factors that contributed to the low quality of end-of-life care were inadequate knowledge and negative attitudes. These findings may reflect that end-of-life care education is not well integrated into nursing education.

    CONCLUSION: The findings of this study suggest that there is a need to increase the nurses' level of knowledge and improve their attitude towards end-of-life care in order to enhance the quality of care provided to dying patients.

    IMPLICATIONS FOR NURSING AND HEALTH POLICY: Nurse managers and hospital policymakers should develop strategies to enhance nurses' level of knowledge, as well as providing adequate emotional support for nurses who care for dying patients and their families. Nurses should be proactive in increasing their knowledge and adopting more positive attitudes towards end-of-life care.

    MeSH terms: Adult; Attitude to Death; Female; Humans; Health Knowledge, Attitudes, Practice; Malaysia; Male; Middle Aged; Nurse-Patient Relations*; Nursing Staff, Hospital/psychology*; Quality of Health Care; Terminal Care/psychology*; Nurse's Role/psychology*; Young Adult
  10. Dineen RA, Pszczolkowski S, Flaherty K, Law ZK, Morgan PS, Roberts I, et al.
    BMJ Open, 2018 02 03;8(2):e019930.
    PMID: 29431141 DOI: 10.1136/bmjopen-2017-019930
    OBJECTIVES: To test whether administration of the antifibrinolytic drug tranexamic acid (TXA) in patients with spontaneous intracerebral haemorrhage (SICH) leads to increased prevalence of diffusion-weighted MRI-defined hyperintense ischaemic lesions (primary hypothesis) or reduced perihaematomal oedema volume, perihaematomal diffusion restriction and residual MRI-defined SICH-related tissue damage (secondary hypotheses).

    DESIGN: MRI substudy nested within the double-blind randomised controlled Tranexamic Acid for Hyperacute Primary Intracerebral Haemorrhage (TICH)-2 trial (ISRCTN93732214).

    SETTING: International multicentre hospital-based study.

    PARTICIPANTS: Eligible adults consented and randomised in the TICH-2 trial who were also able to undergo MRI scanning. To address the primary hypothesis, a sample size of n=280 will allow detection of a 10% relative increase in prevalence of diffusion-weighted imaging (DWI) hyperintense lesions in the TXA group with 5% significance, 80% power and 5% imaging data rejection.

    INTERVENTIONS: TICH-2 MRI substudy participants will undergo MRI scanning using a standardised protocol at day ~5 and day ~90 after randomisation. Clinical assessments, randomisation to TXA or placebo and participant follow-up will be performed as per the TICH-2 trial protocol.

    CONCLUSION: The TICH-2 MRI substudy will test whether TXA increases the incidence of new DWI-defined ischaemic lesions or reduces perihaematomal oedema or final ICH lesion volume in the context of SICH.

    ETHICS AND DISSEMINATION: The TICH-2 trial obtained ethical approval from East Midlands - Nottingham 2 Research Ethics Committee (12/EM/0369) and an amendment to allow the TICH-2 MRI sub study was approved in April 2015 (amendment number SA02/15). All findings will be published in peer-reviewed journals. The primary outcome results will also be presented at a relevant scientific meeting.

    TRIAL REGISTRATION NUMBER: ISRCTN93732214; Pre-results.

    MeSH terms: Antifibrinolytic Agents/administration & dosage*; Brain/drug effects*; Brain/pathology; Cerebral Hemorrhage/drug therapy*; Double-Blind Method; Humans; International Cooperation; Magnetic Resonance Imaging; Research Design; Tranexamic Acid/administration & dosage*; Logistic Models; Treatment Outcome
  11. Palmer S, Albergante L, Blackburn CC, Newman TJ
    Proc Natl Acad Sci U S A, 2018 02 20;115(8):1883-1888.
    PMID: 29432166 DOI: 10.1073/pnas.1714478115
    For many cancer types, incidence rises rapidly with age as an apparent power law, supporting the idea that cancer is caused by a gradual accumulation of genetic mutations. Similarly, the incidence of many infectious diseases strongly increases with age. Here, combining data from immunology and epidemiology, we show that many of these dramatic age-related increases in incidence can be modeled based on immune system decline, rather than mutation accumulation. In humans, the thymus atrophies from infancy, resulting in an exponential decline in T cell production with a half-life of ∼16 years, which we use as the basis for a minimal mathematical model of disease incidence. Our model outperforms the power law model with the same number of fitting parameters in describing cancer incidence data across a wide spectrum of different cancers, and provides excellent fits to infectious disease data. This framework provides mechanistic insight into cancer emergence, suggesting that age-related decline in T cell output is a major risk factor.
    MeSH terms: Aging/immunology*; Female; Humans; Male; Models, Biological; Mutation; Neoplasms/etiology*; Neoplasms/genetics*; Thymus Gland/physiology*; Genetic Predisposition to Disease
  12. Slik JWF, Franklin J, Arroyo-Rodríguez V, Field R, Aguilar S, Aguirre N, et al.
    Proc Natl Acad Sci U S A, 2018 02 20;115(8):1837-1842.
    PMID: 29432167 DOI: 10.1073/pnas.1714977115
    Knowledge about the biogeographic affinities of the world's tropical forests helps to better understand regional differences in forest structure, diversity, composition, and dynamics. Such understanding will enable anticipation of region-specific responses to global environmental change. Modern phylogenies, in combination with broad coverage of species inventory data, now allow for global biogeographic analyses that take species evolutionary distance into account. Here we present a classification of the world's tropical forests based on their phylogenetic similarity. We identify five principal floristic regions and their floristic relationships: (i) Indo-Pacific, (ii) Subtropical, (iii) African, (iv) American, and (v) Dry forests. Our results do not support the traditional neo- versus paleotropical forest division but instead separate the combined American and African forests from their Indo-Pacific counterparts. We also find indications for the existence of a global dry forest region, with representatives in America, Africa, Madagascar, and India. Additionally, a northern-hemisphere Subtropical forest region was identified with representatives in Asia and America, providing support for a link between Asian and American northern-hemisphere forests.
    MeSH terms: Conservation of Natural Resources; Environmental Monitoring; Phylogeny*; Plants/classification*; Plants/genetics*; Tropical Climate*; Biodiversity; Forests*
  13. Thent ZC, Froemming GRA, Muid S
    Life Sci, 2018 Apr 01;198:1-7.
    PMID: 29432759 DOI: 10.1016/j.lfs.2018.02.013
    Bisphenol A (BPA) (2,2,-bis (hydroxyphenyl) propane), a well-known endocrine disruptor (ED), is the exogenous chemical that mimic the natural endogenous hormone like oestrogen. Due to its extensive exposure to humans, BPA is considered to be a major toxicological agent for general population. Environmental exposure of BPA results in adverse health outcomes including bone loss. BPA disturbs the bone health by decreasing the plasma calcium level and inhibiting the calcitonin secretion. BPA also stimulated differentiation and induced apoptosis in human osteoblasts and osteoclasts. However, little is known about the underlying mechanisms of the untoward effect of BPA against bone metabolism. The present review gives an overview on the possible mechanisms of BPA towards bone loss. The previous literature shows that BPA exerts its toxic effect on bone cells by binding to the oestrogen related receptor-gamma (ERγ), reducing the bone morphogenic protein-2 (BMP-2) and alkaline phosphatase (ALP) activities. BPA interrupts the bone metabolism via RANKL, apoptosis and Wnt/β-catenin signaling pathways. It is, however, still debated on the exact underlying mechanism of BPA against bone health. We summarised the molecular evidences with possible mechanisms of BPA, an old environmental culprit, in bone loss and enlightened the underlying understanding of adverse action of BPA in the society.
    MeSH terms: Alkaline Phosphatase/metabolism; Animals; Benzhydryl Compounds/adverse effects*; Bone and Bones/drug effects*; Bone and Bones/metabolism; Bone and Bones/pathology; Calcitonin/antagonists & inhibitors; Calcium/blood; Cell Differentiation/drug effects; Humans; Osteoblasts/drug effects; Osteoclasts/drug effects; Phenols/adverse effects*; Apoptosis; Cell Proliferation/drug effects; Endocrine Disruptors/adverse effects; Bone Morphogenetic Protein 2/metabolism; Wnt Signaling Pathway/drug effects
  14. Liew SM, Rajasekaram G, Puthucheary SD, Chua KH
    J Glob Antimicrob Resist, 2018 06;13:271-273.
    PMID: 29432937 DOI: 10.1016/j.jgar.2018.01.026
    OBJECTIVES: The increasing incidence of carbapenem-resistant Pseudomonas aeruginosa along with the discovery of novel metallo-β-lactamases (MBLs) is of concern. In this study, the isolation of MBL-producing P. aeruginosa clinical strains in Malaysia was investigated.

    METHODS: A total of 53 P. aeruginosa clinical strains were isolated from different patients in Sultanah Aminah Hospital (Johor Bahru, Malaysia) in 2015. Antimicrobial susceptibility testing was performed, and minimum inhibitory concentrations (MICs) of imipenem and meropenem were determined by Etest. Carbapenem-resistant strains were screened for MBL production by the imipenem-ethylene diamine tetra-acetic acid (IMP-EDTA) double-disk synergy test, MBL imipenem/imipenem-inhibitor (IP/IPI) Etest and PCR. Multilocus sequence typing (MLST) analysis was performed for genotyping of the isolates.

    RESULTS: Among the 53 clinical strains, 3 (5.7%) were identified as MBL-producers. Multidrug resistance was observed in all three strains, and two were resistant to all of the antimicrobials tested. Sequencing analysis confirmed that the three strains harboured carbapenemase genes (blaIMP-1, blaVIM-2 and blaNDM-1 in one isolate each). These multidrug-resistant strains were identified as sequence type 235 (ST235) and ST308.

    CONCLUSIONS: The blaIMP-1 and blaNDM-1 genes have not previously been reported in Malaysian P. aeruginosa isolates. The emergence of imipenemase 1 (IMP-1)- and New Delhi metallo-β-lactamase 1 (NDM-1)-producing P. aeruginosa in Malaysia maybe travel-associated.

    MeSH terms: Aged; Anti-Bacterial Agents/pharmacology; beta-Lactamases/biosynthesis; Humans; Malaysia; Male; Microbial Sensitivity Tests; Middle Aged; Pseudomonas aeruginosa/drug effects*; Pseudomonas aeruginosa/genetics*; Pseudomonas Infections/microbiology; Polymerase Chain Reaction; Drug Resistance, Multiple, Bacterial*; Multilocus Sequence Typing
  15. Khoo LS, Lai PS, Saidin MH, Noor Z, Mahmood MS
    Forensic Sci Int, 2018 Apr;285:50-57.
    PMID: 29433011 DOI: 10.1016/j.forsciint.2018.01.018
    Cadaver body bags are the conventional method to contain a human body or human remains, which includes the use for storage and transportation of the deceased at any crime scene or disaster scene. During disasters, most often than not, the first responders including the police will be equipped with cadaver body bags to do scene processing of human remains and collection of personal belongings at the disaster site. However, in an unanticipated large scale disasters involving hundreds and thousands of fatalities, cadaver body bags supplies may be scarce. The authors have therefore innovated the cling film plastic wrap as an alternative for the cadaver body bag used at the disaster site. The plastic wrap was tested on six different experimental subjects, i.e. both adult and child mannequins; body parts of the mannequin figure (arm and hand); a human adult subject and an unknown dead body. The strengths of the cling film plastic wrap are discussed in comparison with the cadaver body bag in the aspects of costing, weight, duration of the wrap, water and body fluid resistant properties, visibility and other advantages. An average savings of more than 5000% are noted for both adult body wrap and child body wrap compared to the cadaver body wrap. This simply means that the authors can either wrap 25 adult dead bodies or 80 children dead bodies with the cost of 1 cadaver body bag. The cling film plastic wrap has proven to have significant innovation impact for dead body management particularly by the first responders in large scale disasters. With proper handling of dead bodies, first responders can manage the dead with dignity and respect in an overwhelmed situation to facilitate the humanitarian victim identification process later.
    MeSH terms: Bandages*; Cadaver*; Disasters*; Emergency Medical Services; Forensic Medicine/instrumentation*; Forensic Medicine/methods; Humans; Plastics*; Body Remains*
  16. Sultana S, Ali ME, Hossain MAM, Asing, Naquiah N, Zaidul ISM
    Food Res Int, 2018 03;105:19-28.
    PMID: 29433207 DOI: 10.1016/j.foodres.2017.10.065
    Species substitution, the use of a low value fish in place of a high value fish, is the biggest problem in international trade and the leading cause of fraud in the fisheries arena sector. Current DNA barcoding systems have partly solved this problem but also failed in many instances to amplify PCR targets from highly processed products because of the degradation of a longer barcode marker (~650bp). In the present study, a novel mini barcode marker (295bp) was developed to discriminate fish species in raw and processed states forms. The barcode primers were cross-tested against 33 fish species and 15 other animal species and found to be universal for all the tested fish varieties. When 20 commercial fish products of five different categories were screened, all commercial fish sample yielded positive bands for the novel fish barcode. PCR product was sequenced to retrieve the species IDs that reflected 55% (11/20) of Malaysian fish products were mislabeled.
    MeSH terms: Animals; DNA/genetics; DNA/isolation & purification; Fish Products; Fishes/classification*; Food Labeling*; Genetic Markers; Malaysia; Polymerase Chain Reaction; DNA Primers/genetics; DNA Primers/isolation & purification; DNA Barcoding, Taxonomic*
  17. Se KW, Ghoshal SK, Wahab RA, Ibrahim RKR, Lani MN
    Food Res Int, 2018 03;105:453-460.
    PMID: 29433236 DOI: 10.1016/j.foodres.2017.11.012
    In this study, we propose an easy approach by combining the Fourier transform infrared and attenuated total reflectance (FTIR-ATR) spectroscopy together with chemometrics analysis for rapid detection and accurate quantification of five adulterants such as fructose, glucose, sucrose, corn syrup and cane sugar in stingless bees (Heterotrigona itama) honey harvested in Malaysia. Adulterants were classified using principal component analysis and soft independent modeling class analogy, where the first derivative of the spectra in the wavenumber range of 1180-750cm-1 was utilized. The protocol could satisfactorily discriminate the stingless bees honey samples that were adulterated with the concentrations of corn syrup above 8% (w/w) and cane sugar over 2% (w/w). Feasibility of integrating FTIR-ATR with chemometrics for precise quantification of the five adulterants was affirmed using partial least square regression (PLSR) analysis. The study found that optimal PLSR analysis achieved standard error of calibrations and standard error of predictions within an acceptable range of 0.686-1.087% and 0.581-1.489%, respectively, indicating good predictive capability. Hence, the method developed here for detecting and quantifying adulteration in H. itama honey samples is accurate and rapid, requiring only 7-8min to complete as compared to 3h for the standard method, AOAC method 998.12.
    MeSH terms: Animals; Bees; Calibration; Canes; Edible Grain; Zea mays; Corn Oil; Fourier Analysis; Fructose; Glucose; Honey; Malaysia; Sucrose; Least-Squares Analysis; Spectroscopy, Fourier Transform Infrared; Principal Component Analysis
  18. Chang HW, Tan TB, Tan PY, Abas F, Lai OM, Wang Y, et al.
    Food Res Int, 2018 03;105:482-491.
    PMID: 29433239 DOI: 10.1016/j.foodres.2017.11.034
    Fish oil-in-water emulsions containing fish oil, thiol-modified β-lactoglobulin (β-LG) fibrils, chitosan and maltodextrin were fabricated using a high-energy method. The results showed that chitosan coating induced charge reversal; denoting successful biopolymers complexation. A significantly (p<0.05) larger droplet size and lower polydispersity index value, attributed to the thicker chitosan coating at the oil-water interface, were observed. At high chitosan concentrations, the cationic nature of chitosan strengthened the electrostatic repulsion between the droplets, thus conferring high oxidative stability and low turbidity loss rate to the emulsions. The apparent viscosity of emulsions stabilized using thiol-modified β-LG fibrils-chitosan complex was higher than those stabilized using β-LG fibrils alone, resulting in the former's higher creaming stability. Under thermal treatments (63°C and 100°C), emulsions stabilized using thiol-modified β-LG fibrils-chitosan complex possessed higher heat stability as indicated by the consistent droplet sizes observed. Chitosan provided a thicker protective layer that protected the oil droplets against high temperature. Bridging flocculation occurred at low chitosan concentration (0.1%, w/w), as revealed through microscopic observations which indicated the presence of large flocs. All in all, this work provided us with a better understanding of the application of protein fibrils-polysaccharide complex to produce stable emulsion.
    MeSH terms: Biopolymers; Cations; Emulsions; Fish Oils; Flocculation; Hot Temperature; Lactoglobulins; Polysaccharides; Sulfhydryl Compounds; Temperature; Viscosity; Water; Chitosan; Static Electricity
  19. Amirullah NA, Zainal Abidin N, Abdullah N
    Food Res Int, 2018 03;105:517-536.
    PMID: 29433243 DOI: 10.1016/j.foodres.2017.11.023
    Atherosclerosis is a complex pathology that involves several factors in its development, like oxidative stress, inflammation, hyperlipidemia, platelet aggregation and thrombus formation. Several drugs and therapeutic approaches have been developed to handle these aspects of atherosclerosis. However, some of these treatments can be costly and have undesirable side effects. Many constituents of mushrooms have been shown to have potential anti-atherosclerotic effects in several in vitro and in vivo studies. Recently, the possible mechanisms in which they exert these effects have also been elucidated. In this review, some of the research focusing on mushrooms and their potential anti-atherosclerotic effects are examined. Many mushroom species exhibited anti-oxidative, anti-inflammatory and hypolipidemic effects that can potentially attenuate the progression of atherosclerosis, either through their isolated compounds or use of crude extracts. More studies are focused on the effect that mushrooms have on gene expressions that are involved in oxidative stress, inflammation, and hyperlipidemia. These studies could provide us with a better understanding on the mechanisms in which the consumption of mushrooms could exert their possible anti-atherosclerotic effects. Further research needs to be done to uncover other possible mechanisms that are affected by mushroom use.
    MeSH terms: Agaricales; Anti-Inflammatory Agents; Hyperlipidemias; Inflammation; Platelet Aggregation; Thrombosis; Oxidative Stress; Complex Mixtures; Atherosclerosis
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