Browse publications by year: 2013

  1. Ho LY, Zairi J
    Trop Biomed, 2013 Mar;30(1):125-30.
    PMID: 23665718 MyJurnal
    A 14-months survey was carried out to identify the species composition of Anopheles mosquitoes from Kampung Bongor, Grik, Perak. Adding to that, a preliminary one month mosquito population screening was done at Kampung Tepin, Serian, Sarawak. Consequently, the insecticide susceptibility status of a pyrethroid was tested against two selected species of Anopheles collected from these two locations in Malaysia. A total of 4,497 Anopheles from 11 species were identified from collections in Kampung Bongor, whereas 2,654 An. letifer were collected from Kampung Tepin. The An. maculatus of Kampung Bongor and An. letifer of Kampung Tepin were then selected and tested using WHO standard diagnostic test kits and impregnated papers with 0.75% permethrin. The response values of KT50 and KT95 for An. maculatus were recorded at 28.09 minutes and 62.98 minutes respectively. Anopheles letifer recorded much slower response values of KT50 and KT95, which was at 35.09 minutes and 73.03 minutes respectively. Both An. maculatus and An. letifer showed 100% mortality after 24 hours holding period. The results indicate that both species were still susceptible to the tested pyrethroid. For effective vector control and resistance management, accurate and periodic insecticide resistance monitoring should be undertaken especially in rural areas with agricultural usage of insecticides.
    MeSH terms: Animals; Anopheles/anatomy & histology; Anopheles/classification*; Anopheles/drug effects*; Anopheles/growth & development; Biological Assay; Entomology; Female; Humans; Insecticides/pharmacology*; Malaysia; Microscopy; Pyrethrins/pharmacology*; Survival Analysis; Permethrin/pharmacology; Biodiversity
  2. Ithoi I, Mahmud R, Abdul Basher MH, Jali A, Abdulsalam AM, Ibrahim J, et al.
    Trop Biomed, 2013 Mar;30(1):131-40.
    PMID: 23665719 MyJurnal
    A total of 10 out of 65 cornea swab samples from cats with eye symptoms showed Acanthamoeba-like morphology after cultivation. By PCR and DNA sequencing of Acanthamoeba diagnostic fragment 3 (DF3), all 10 isolates from the positive samples were categorized into two homologous groups of AfC1 (PM1, PM2, PM3, PF6, KM7, KF8, KMK9) and AfC2 (PM4, PM5, KFK10) due to the presence of bases A(354) and G(354), respectively. Furthermore, DF3 of AfC1 and AfC2 showed 100% similarity with Genbank reference isolates with the accession numbers DQ087314, EU146073 and U07401, GU808323, which were Acanthamoeba castellanii strains genotype T4 originating from human keratitis. This finding suggests that A. castellani strains have the capability to infect cats and human under favorable conditions.
    MeSH terms: Animals; Cat Diseases/parasitology*; Cats; Cornea/parasitology*; Female; Genotype; Humans; Male; Phylogeny; Acanthamoeba Keratitis/parasitology; Acanthamoeba Keratitis/veterinary*; Cluster Analysis; DNA, Protozoan/genetics; DNA, Protozoan/isolation & purification; Polymerase Chain Reaction; Sequence Analysis, DNA; Acanthamoeba castellanii/classification*; Acanthamoeba castellanii/genetics*; Acanthamoeba castellanii/isolation & purification
  3. Nor Faiza S, Saleha AA, Jalila A, Fauziah N
    Trop Biomed, 2013 Mar;30(1):155-8.
    PMID: 23665722 MyJurnal
    The importance of Campylobacter and Salmonella as foodborne pathogens is well recognised globally. A recent work in Penang found ducks in commercial farms were infected with these organisms. The aim of the study was to detect the presence of Campylobacter and Salmonella in ducks and Salmonella in duck eggs in farms in a small part of Selangor. Cloacal swabs were obtained from 75 ducks and 30 duck eggs from three farms. The isolation and identification of Campylobacter and Salmonella were done using conventional methods. Twelve percent of Campylobacter and 16.0% of Salmonella were isolated from the ducks sampled. Salmonella was absent on and in eggs. Campylobacter isolates consisted of 22% Campylobacter jejuni and the remaining was Campylobacter coli. Three Salmonella serovars identified were Salmonella Agona, S. Braenderup and S. Corvallis. The presence of Campylobacter and Salmonella in ducks may cause contamination of the meat during processing and handling which can constitute public health hazard. Moreover, the farm workers may be exposed to the organisms through contact with the infected animals.
    MeSH terms: Animals; Bacteriological Techniques; Campylobacter/classification; Campylobacter/isolation & purification*; Campylobacter Infections/microbiology; Campylobacter Infections/epidemiology; Campylobacter Infections/veterinary*; Cloaca/microbiology; Ducks/microbiology*; Eggs/microbiology*; Malaysia; Salmonella/classification; Salmonella/isolation & purification*; Salmonella Infections, Animal/microbiology; Salmonella Infections, Animal/epidemiology*; Prevalence
  4. Heo CC, Aisha S, Kurahashi H, Omar B
    Trop Biomed, 2013 Mar;30(1):159-63.
    PMID: 23665723 MyJurnal
    Isomyia paurogonita Fang & Fan, 1986 (Diptera: Calliphoridae), a rare species of the subfamily Rhiniinae (tribe Cosminini) was recorded for the first time in Malaysia. We collected one male and two females during a field trip conducted at Genting Highland, Pahang, peninsular Malaysia in May 2011. A 3-day old cow liver was offered as attractant and dipterans collected were transferred to the laboratory for specimens processing and identification. The adults of I. paurogonita were attracted to the odour and then captured by using a sweep net. Isomyia paurogonita was also recorded from two other localities in Peninsular and Malaysian Borneo, namely Gombak Utara, Selangor and Sibu, Sarawak.
    MeSH terms: Animals; Borneo; Diptera/anatomy & histology; Diptera/classification*; Diptera/growth & development*; Entomology/methods; Female; Malaysia; Male; Microscopy; Phylogeography
  5. Ahmad AF, Hadip F, Ngui R, Lim YA, Mahmud R
    Parasitol Res, 2013 Aug;112(8):2811-6.
    PMID: 23666229 DOI: 10.1007/s00436-013-3450-z
    Detection of Strongyloides stercoralis infection particularly in asymptomatic individuals is often hampered due to the lack of standard diagnostic tools. In this study, the use of serological and molecular approaches were investigated for the detection of S. stercoralis infection among an Orang Asli (indigenous) community following a preliminary detection by microscopic examination of faecal samples. Out of 54 individuals studied, 17/54 (31.5%) were detected to be positive for S. stercoralis infection by enzyme-linked immunosorbent assay (ELISA), compared to 0/54 (0%) by faecal examination. Further confirmation performed by a nested polymerase chain reaction (PCR) using DNA extracted from faecal samples of these 17 individuals yielded 3/17 (17.6%) positives for S. stercoralis DNA amplification. No amplification was seen with the other 37 faecal samples, which were negative by microscopy and ELISA. As the high ELISA positive results were suspected to be false-positives, ELISA is not recommended for use as a detection tool but may be beneficial for evaluating the effectiveness of anti-Strongyloides drugs. The present finding indicated that PCR should be considered as an alternative diagnostic tool for the detection of S. stercoralis infection.
    MeSH terms: Adolescent; Adult; Animals; Child; Child, Preschool; Feces/parasitology; Female; Humans; Infant; Malaysia/epidemiology; Male; Serologic Tests; Strongyloidiasis/blood*; Strongyloidiasis/diagnosis; Strongyloidiasis/epidemiology; Strongyloides stercoralis/isolation & purification*; Young Adult
  6. Sow AY, Ismail A, Zulkifli SZ
    Bull Environ Contam Toxicol, 2013 Jul;91(1):6-12.
    PMID: 23666324 DOI: 10.1007/s00128-013-1009-4
    Livers and muscles of swamp eels (Monopterus albus) were analyzed for bioaccumulation of heavy metals during the plowing stage of a paddy cycle. Results showed heavy metals were bioaccumulated more highly in liver than muscle. Zinc (Zn) was the highest bioaccumulated metal in liver (98.5 ± 8.95 μg/g) and in muscle (48.8 ± 7.17 μg/g). The lowest bioaccumulated metals were cadmium (Cd) in liver (3.44 ± 2.42 μg/g) and copper (Cu) in muscle (0.65 ± 0.20 μg/g). In sediments, Zn was present at the highest mean concentration (52.7 ± 2.85 μg/g), while Cd had the lowest mean concentration (1.04 ± 0.24 μg/g). The biota-sediment accumulation factor (BSAF) for Cu, Zn, Cd and nickel (Ni) in liver tissue was greater than the corresponding BSAF for muscle tissue. For the three plowing stages, metal concentrations were significantly correlated between liver and muscle tissues in all cases, and between sediment and either liver or muscle in most cases. Mean measured metal concentrations in muscle tissue were below the maximum permissible limits established by Malaysian and U.S. governmental agencies, and were therefore regarded as safe for human consumption.
    MeSH terms: Agriculture; Animals; Environmental Exposure*; Environmental Monitoring; Liver/drug effects; Liver/metabolism; Malaysia; Spectrophotometry, Atomic; Water Pollutants, Chemical/analysis; Water Pollutants, Chemical/metabolism*; Muscle, Skeletal/drug effects; Muscle, Skeletal/metabolism; Geologic Sediments/analysis*; Metals, Heavy/analysis; Metals, Heavy/metabolism*; Smegmamorpha/metabolism*
  7. Getachew Y, Hassan L, Zakaria Z, Abdul Aziz S
    Appl Environ Microbiol, 2013 Aug;79(15):4528-33.
    PMID: 23666337 DOI: 10.1128/AEM.00650-13
    Vancomycin-resistant enterococci (VRE) have been reported to be present in humans, chickens, and pigs in Malaysia. In the present study, representative samples of VRE isolated from these populations were examined for similarities and differences by using the multilocus sequence typing (MLST) method. Housekeeping genes of Enterococcus faecium (n = 14) and Enterococcus faecalis (n = 11) isolates were sequenced and analyzed using the MLST databases eBURST and goeBURST. We found five sequence types (STs) of E. faecium and six STs of E. faecalis existing in Malaysia. Enterococcus faecium isolates belonging to ST203, ST17, ST55, ST79, and ST29 were identified, and E. faecium ST203 was the most common among humans. The MLST profiles of E. faecium from humans in this study were similar to the globally reported nosocomial-related strain lineage belonging to clonal complex 17 (CC17). Isolates from chickens and pigs have few similarities to those from humans, except for one isolate from a chicken, which was identified as ST203. E. faecalis isolates were more diverse and were identified as ST4, ST6, ST87, ST108, ST274, and ST244, which were grouped as specific to the three hosts. E. faecalis, belonging to the high-risk CC2 and CC87, were detected among isolates from humans. In conclusion, even though one isolate from a chicken was found clonal to that of humans, the MLST analysis of E. faecium and E. faecalis supports the findings of others who suggest VRE to be predominantly host specific and that clinically important strains are found mainly among humans. The infrequent detection of a human VRE clone in a chicken may in fact suggest a reverse transmission of VRE from humans to animals.
    MeSH terms: Animals; Chickens*; Humans; Malaysia; Phylogeny; Poultry Diseases/microbiology*; Enterococcus faecalis/drug effects; Enterococcus faecalis/genetics*; Enterococcus faecalis/isolation & purification; Swine; Swine Diseases/microbiology*; Polymerase Chain Reaction; Gram-Positive Bacterial Infections/microbiology*; Gram-Positive Bacterial Infections/veterinary*; Enterococcus faecium/drug effects; Enterococcus faecium/genetics*; Enterococcus faecium/isolation & purification; Vancomycin Resistance*; Multilocus Sequence Typing
  8. Ibrahim MF, Razak MN, Phang LY, Hassan MA, Abd-Aziz S
    Appl Biochem Biotechnol, 2013 Jul;170(6):1320-35.
    PMID: 23666614 DOI: 10.1007/s12010-013-0275-2
    Cellulase is an enzyme that converts the polymer structure of polysaccharides into fermentable sugars. The high market demand for this enzyme together with the variety of applications in the industry has brought the research on cellulase into focus. In this study, crude cellulase was produced from oil palm empty fruit bunch (OPEFB) pretreated with 2% NaOH with autoclave, which was composed of 59.7% cellulose, 21.6% hemicellulose, and 12.3% lignin using Trichoderma asperellum UPM1 and Aspergillus fumigatus UPM2. Approximately 0.8 U/ml of FPase, 24.7 U/ml of CMCase and 5.0 U/ml of β-glucosidase were produced by T. asperellum UPM1 at a temperature of 35 °C and at an initial pH of 7.0. A 1.7 U/ml of FPase, 24.2 U/ml of CMCase, and 1.1 U/ml of β-glucosidase were produced by A. fumigatus UPM2 at a temperature of 45 °C and at initial pH of 6.0. The crude cellulase was best produced at 1% of substrate concentration for both T. asperellum UPM1 and A. fumigatus UPM2. The hydrolysis percentage of pretreated OPEFB using 5% of crude cellulase concentration from T. asperellum UPM1 and A. fumigatus UPM2 were 3.33% and 19.11%, with the reducing sugars concentration of 1.47 and 8.63 g/l, respectively.
    MeSH terms: Aspergillus fumigatus/classification; Aspergillus fumigatus/metabolism*; Carbohydrates/biosynthesis*; Cellulase/biosynthesis*; Fruit/microbiology*; Species Specificity; Trichoderma/classification; Trichoderma/metabolism*; Arecaceae/microbiology*
  9. Singh PN, Kheam T, Lopez J, Job JS, Yel D
    Asia Pac J Public Health, 2013 Sep;25(5 Suppl):54S-63S.
    PMID: 23666842 DOI: 10.1177/1010539513487014
    Although current trends indicate that the rate of cigarette smoking tends to be low among women in the Western Pacific Region (<10%), recent epidemiologic data from South Asia (India, Bangladesh) and Southeast Asia (Cambodia, Vietnam, Indonesia, Malaysia) identify that a large proportion of women of reproductive age and older chew tobacco--often as part of a betel quid mixture that includes other potentially harmful ingredients (eg, areca nut). Our findings from currently pregnant women identified during a nationwide survey of adult tobacco use in Cambodia indicate that 13.0% (95% confidence interval [CI] = 8% to 17%) were current users of smoked or smokeless (in the form of a betel quid) tobacco. Most pregnant women who used tobacco indicated that their habit was either initiated (29.1%; 95% CI = 16.3-46.3) or increased (33.7%; 95% CI = 18.3-53.5) during pregnancy. Pregnancy-related symptoms such as morning sickness were reported as the reason for more than half (54.9%; 95% CI = 34.8-73.4) of the currently pregnant users to have started a tobacco habit during their lifetime. Among those pregnant women who did not use tobacco, we found strong associations (odds ratios from 2 to 14) with beliefs about the harmful effects of tobacco on adult health, faith-based beliefs in addictive substances, and beliefs that influential members of the community, health professionals, and children should not use tobacco. Our findings indicate that tobacco cessation and prevention programs in Cambodia should specifically target pregnant and reproductive-age women.
    MeSH terms: Adult; Cambodia/epidemiology; Female; Health Surveys; Humans; Health Knowledge, Attitudes, Practice; Pregnancy; Tobacco, Smokeless/statistics & numerical data*; Pregnant Women/psychology*; Young Adult; Tobacco Use/epidemiology; Tobacco Use/psychology*
  10. de Wit M, Abma T, Koelewijn-van Loon M, Collins S, Kirwan J
    BMJ Open, 2013 May 09;3(5).
    PMID: 23667160 DOI: 10.1136/bmjopen-2012-002241
    OBJECTIVE: To assess the inclusion of patients as international research partners in Outcome Measures in Rheumatology (OMERACT) conferences and how this has influenced the scope and conduct of outcomes research in rheumatology.

    DESIGN: A thematic content analysis of OMERACT internal documents, publications and conference proceedings, followed by a responsive evaluation including 32 qualitative semistructured interviews.

    SETTING: The international, biannual research conference OMERACT 10 (Malaysia, 2010).

    PARTICIPANTS: Senior researchers (n=10), junior researchers (n=2), representatives of the pharmaceutical industry and regulators (n=2), conference staff (n=2), new patient delegates (n=8) and experienced patient delegates (n=8).

    RESULTS: The role of patients evolved over 10 years from a single patient focus group to full participation in all areas of the meeting and inclusion in research group meetings between conferences. Five main categories of impact emerged: widening the research agenda; including patient relevant outcomes in core sets; enhancing patient reported instruments; changing the culture of OMERACT and consequences outside OMERACT. Patient participants identified previously neglected outcome domains such as fatigue, sleep disturbances and flares which prompted collaborative working on new programmes of research. Specific benefits and challenges for patients and professionals were identified, such as personal fulfilment, widening of research interests, difficulties in establishing equal partnerships and concerns about loss of research rigour.

    CONCLUSIONS: Including patients as partners in OMERACT conferences has widened its focus and adjusted the way of working. It has resulted in new developments in the research agenda and the use of more patient-relevant outcomes in clinical trials. These collaborations have influenced perceptions and beliefs among many patients and researchers, and led to wider patient involvement as partners in research.

  11. Khan I, Ali F, Shafie S
    PLoS One, 2013;8(5):e61531.
    PMID: 23667442 DOI: 10.1371/journal.pone.0061531
    The present work is concerned with exact solutions of Stokes second problem for magnetohydrodynamics (MHD) flow of a Burgers' fluid. The fluid over a flat plate is assumed to be electrically conducting in the presence of a uniform magnetic field applied in outward transverse direction to the flow. The equations governing the flow are modeled and then solved using the Laplace transform technique. The expressions of velocity field and tangential stress are developed when the relaxation time satisfies the condition γ =  λ²/4 or γ> λ²/4. The obtained closed form solutions are presented in the form of simple or multiple integrals in terms of Bessel functions and terms with only Bessel functions. The numerical integration is performed and the graphical results are displayed for the involved flow parameters. It is found that the velocity decreases whereas the shear stress increases when the Hartmann number is increased. The solutions corresponding to the Stokes' first problem for hydrodynamic Burgers' fluids are obtained as limiting cases of the present solutions. Similar solutions for Stokes' second problem of hydrodynamic Burgers' fluids and those for Newtonian and Oldroyd-B fluids can also be obtained as limiting cases of these solutions.
    MeSH terms: Magnetics/methods*; Models, Theoretical*; Hydrodynamics*
  12. Chow WZ, Ong LY, Razak SH, Lee YM, Ng KT, Yong YK, et al.
    PLoS One, 2013;8(5):e62560.
    PMID: 23667490 DOI: 10.1371/journal.pone.0062560
    Since the discovery of HIV-1 circulating recombinant form (CRF) 33_01B in Malaysia in the early 2000 s, continuous genetic diversification and active recombination involving CRF33_01B and other circulating genotypes in the region including CRF01_AE and subtype B' of Thai origin, have led to the emergence of novel CRFs and unique recombinant forms. The history and magnitude of CRF33_01B transmission among various risk groups including people who inject drugs (PWID) however have not been investigated despite the high epidemiological impact of CRF33_01B in the region. We update the most recent molecular epidemiology of HIV-1 among PWIDs recruited in Malaysia between 2010 and 2011 by population sequencing and phylogenetic analysis of 128 gag-pol sequences. HIV-1 CRF33_01B was circulating among 71% of PWIDs whilst a lower prevalence of other previously dominant HIV-1 genotypes [subtype B' (11%) and CRF01_AE (5%)] and CRF01_AE/B' unique recombinants (13%) were detected, indicating a significant shift in genotype replacement in this population. Three clusters of CRF01_AE/B' recombinants displaying divergent yet phylogenetically-related mosaic genomes to CRF33_01B were identified and characterized, suggestive of an abrupt emergence of multiple novel CRF clades. Using rigorous maximum likelihood approach and the Bayesian Markov chain Monte Carlo (MCMC) sampling of CRF33_01Bpol sequences to elucidate the past population dynamics, we found that the founder lineages of CRF33_01B were likely to have first emerged among PWIDs in the early 1990 s before spreading exponentially to various high and low-risk populations (including children who acquired infections from their mothers) and later on became endemic around the early 2000 s. Taken together, our findings provide notable genetic evidence indicating the widespread expansion of CRF33_01B among PWIDs and into the general population. The emergence of numerous previously unknown recombinant clades highlights the escalating genetic complexity of HIV-1 in the Southeast Asian region.
    MeSH terms: Adult; Bayes Theorem; Humans; Malaysia/epidemiology; Male; Middle Aged; Phylogeny; Recombination, Genetic*; Genetic Variation*; HIV-1/genetics*; HIV-1/physiology*; HIV Infections/blood; HIV Infections/epidemiology*; HIV Infections/transmission; Molecular Epidemiology; Substance-Related Disorders/virology*; Young Adult
  13. Rahman MM, Azirun SM, Boyce AN
    PLoS One, 2013;8(5):e62941.
    PMID: 23667546 DOI: 10.1371/journal.pone.0062941
    Soil contamination by copper (Cu) and lead (Pb) is a widespread environmental problem. For phytoextraction to be successful and viable in environmental remediation, strategies that can improve plant uptake must be identified. In the present study we investigated the use of nitrogen (N) fertilizer as an efficient way to enhance accumulation of Cu and Pb from contaminated industrial soils into amaranth, Indian mustard and sunflower.
    MeSH terms: Analysis of Variance; Biodegradation, Environmental; Copper/pharmacokinetics*; Fertilizers; Helianthus/metabolism*; Hydrogen-Ion Concentration; Lead/pharmacokinetics*; Malaysia; Mustard Plant/metabolism*; Nitrogen/pharmacology; Soil Pollutants/pharmacokinetics*; Species Specificity; Linear Models; Plant Roots/metabolism; Plant Shoots/metabolism; Amaranthus/metabolism*
  14. Dickin SK, Schuster-Wallace CJ, Elliott SJ
    PLoS One, 2013;8(5):e63584.
    PMID: 23667642 DOI: 10.1371/journal.pone.0063584
    The Water-associated Disease Index (WADI) was developed to identify and visualize vulnerability to different water-associated diseases by integrating a range of social and biophysical determinants in map format. In this study vulnerability is used to encompass conditions of exposure, susceptibility, and differential coping capacity to a water-associated health hazard. By assessing these conditions, the tool is designed to provide stakeholders with an integrated and long-term understanding of subnational vulnerabilities to water-associated disease and contribute to intervention strategies to reduce the burden of illness. The objective of this paper is to describe and validate the WADI tool by applying it to dengue. A systemic ecohealth framework that considers links between people, the environment and health was applied to identify secondary datasets, populating the index with components including climate conditions, land cover, education status and water use practices. Data were aggregated to create composite indicators of exposure and of susceptibility in a Geographic Information System (GIS). These indicators were weighted by their contribution to dengue vulnerability, and the output consisted of an overall index visualized in map format. The WADI was validated in this Malaysia case study, demonstrating a significant association with dengue rates at a sub-national level, and illustrating a range of factors that drive vulnerability to the disease within the country. The index output indicated high vulnerability to dengue in urban areas, especially in the capital Kuala Lumpur and surrounding region. However, in other regions, vulnerability to dengue varied throughout the year due to the influence of seasonal climate conditions, such as monsoon patterns. The WADI tool complements early warning models for water-associated disease by providing upstream information for planning prevention and control approaches, which increasingly require a comprehensive and geographically broad understanding of vulnerability for implementation.
    MeSH terms: Dengue/epidemiology*; Health Status Indicators*; Humans; Malaysia/epidemiology; Risk Assessment; Vulnerable Populations/statistics & numerical data*; Geographic Information Systems; Geographic Mapping*
  15. Tworzydlo W, Kisiel E, Bilinski SM
    PLoS One, 2013;8(5):e64087.
    PMID: 23667700 DOI: 10.1371/journal.pone.0064087
    Three main reproductive strategies have been described among insects: most common oviparity, ovoviviparity and viviparity. In the latter strategy, the embryonic development takes place within the body of the mother which provides gas exchange and nutrients for embryos. Here we present the results of histological and EM analyses of the female reproductive system of the viviparous earwig, Arixenia esau, focusing on all the modifications related to the viviparity. We show that in the studied species the embryonic development consists of two "physiological phases" that take place in two clearly disparate compartments, i.e. the terminal ovarian follicle and the uterus. In both compartments the embryos are associated with synthetically active epithelial cells. We suggest that these cells are involved in the nourishment of the embryo. Our results indicate that viviparity in arixeniids is more complex than previously considered. We propose the new term "pseudoplacento-uterotrophic viviparity" for this unique two-phase reproductive strategy.
    MeSH terms: Animals; Embryo, Nonmammalian/embryology; Embryo, Nonmammalian/ultrastructure; Epithelial Cells/metabolism; Female; Ovarian Follicle/cytology; Ovarian Follicle/physiology*; Insects/embryology*; Malaysia; Microscopy, Electron, Scanning; Microscopy, Fluorescence; Uterus/cytology; Uterus/physiology*; Microscopy, Electron, Transmission; Embryonic Development/physiology*; Viviparity, Nonmammalian/physiology*
  16. Tamilvanan S, Baskar R
    Pharm Dev Technol, 2013 Jul-Aug;18(4):761-71.
    PMID: 23668371 DOI: 10.3109/10837450.2011.586038
    Celecoxib (CXB, 0.2 g)-loaded anionic and cationic nanosized emulsions were prepared by a well-established combined emulsification method.
    MeSH terms: Celecoxib; Animals; Anions; Anti-Inflammatory Agents/administration & dosage; Anti-Inflammatory Agents/pharmacokinetics; Anti-Inflammatory Agents/pharmacology*; Carrageenan/toxicity; Cations; Cellulose/analogs & derivatives; Cellulose/metabolism; Delayed-Action Preparations; Diffusion; Disease Models, Animal; Edema/drug therapy; Edema/pathology; Emulsions; Inflammation/drug therapy; Inflammation/pathology; Male; Phospholipids/chemistry; Pyrazoles/administration & dosage; Pyrazoles/pharmacokinetics; Pyrazoles/pharmacology*; Skin/metabolism; Skin Absorption*; Sulfonamides/administration & dosage; Sulfonamides/pharmacokinetics; Sulfonamides/pharmacology*; Rats, Wistar; Rats; Nanoparticles*
  17. Moriya S, Ogawa S, Parhar IS
    Biochem Biophys Res Commun, 2013 Jun 14;435(4):562-6.
    PMID: 23669040 DOI: 10.1016/j.bbrc.2013.05.004
    Most vertebrates possess at least two gonadotropin-releasing hormone (GnRH) neuron types. To understand the physiological significance of the multiple GnRH systems in the brain, we examined three GnRH neuron type-specific transcriptomes using single-cell microarray analyses in the medaka (Oryzias latipes). A microarray profile of the three GnRH neuron types revealed five genes that are uniquely expressed in specific GnRH neuron types. GnRH1 neurons expressed three genes that are homologous to functionally characterised genes, GnRH2 neurons uniquely expressed one unnamed gene, and GnRH3 neurons uniquely expressed one known gene. These genes may be involved in the modulation or maintenance of each GnRH neuron type.
    MeSH terms: Animals; Brain/metabolism*; Cell Separation/methods; Cells, Cultured; Gonadotropin-Releasing Hormone/metabolism*; Male; Neurons/metabolism*; Oryzias/metabolism*; Gene Expression Profiling/methods*; Protein Array Analysis/methods*; Optical Tweezers; Transcriptome/physiology*
  18. Al-Adiwish WM, Tahir MI, Siti-Noor-Adnalizawati A, Hashim SF, Ibrahim N, Yaacob WA
    Eur J Med Chem, 2013 Jun;64:464-76.
    PMID: 23669354 DOI: 10.1016/j.ejmech.2013.04.029
    New 5-aminopyrazoles 2a-c were prepared in high yields from the reaction of known α,α-dicyanoketene-N,S-acetals 1a-c with hydrazine hydrate under reflux in ethanol. These compounds were utilized as intermediates to synthesize pyrazolo[1,5-a]-pyrimidines 3a-c, 4a-d, 5a-c, and 6a-c, as well as pyrazolo[5,1-c][1,2,4]triazines 7a-c and 8a-c, by the reaction of 2-[bis(methylthio)methylene]malononitrile, α,α-dicyanoketene-N,S-acetals 1a-b, acetylacetone, acetoacetanilide as well as acetylacetone, and malononitrile, respectively. Furthermore, cyclization of 2a-c with pentan-2,5-dione yielded the corresponding 5-pyrrolylpyrazoles 9a-c. Moreover, fusion of 2a-c with acetic anhydride resulted in the corresponding 1-acetyl-1H-pyrazoles 10a-c. The antibacterial activity and cytotoxicity against Vero cells of several selected compounds are also reported.
    MeSH terms: Animals; Anti-Bacterial Agents/chemical synthesis; Anti-Bacterial Agents/pharmacology*; Anti-Bacterial Agents/chemistry; Bacteria/drug effects*; Cell Survival/drug effects; Cercopithecus aethiops; Dose-Response Relationship, Drug; Drug Evaluation, Preclinical; Microbial Sensitivity Tests; Models, Molecular; Pyrazoles/chemical synthesis; Pyrazoles/pharmacology*; Pyrazoles/chemistry*; Pyrimidines/chemical synthesis; Pyrimidines/pharmacology*; Pyrimidines/chemistry; Structure-Activity Relationship; Triazines/chemical synthesis; Triazines/pharmacology*; Triazines/chemistry; Vero Cells; Molecular Structure; Crystallography, X-Ray
  19. Atshan SS, Shamsudin MN, Karunanidhi A, van Belkum A, Lung LT, Sekawi Z, et al.
    Infect Genet Evol, 2013 Aug;18:106-12.
    PMID: 23669446 DOI: 10.1016/j.meegid.2013.05.002
    Staphylococcus aureus biofilm associated infections remains a major clinical concern in patients with indwelling devices. Quantitative real-time PCR (qPCR) can be used to investigate the pathogenic role of such biofilms. We describe qPCRs for 12 adhesion and biofilm-related genes of four S. aureus isolates which were applied during in vitro biofilm development. An endogenous control (16S rRNA) was used for signal normalization. We compared the qPCR results with structural analysis using scanning electron microscopy (SEM). The SEM studies showed different cellular products surrounding the aggregated cells at different times of biofilm formation. Using qPCR, we found that expression levels of the gene encoding fibronectin binding protein A and B and clumping factor B (fnbA/B and clfB), which involves in primary adherence of S. aureus, were significantly increased at 24h and decreased slightly and variably at 48 h when all 4 isolates were considered. The elastin binding protein (ebps) RNA expression level was significantly enhanced more than 6-fold at 24 and 48 h compared to 12h. Similar results were obtained for the intercellular adhesion biofilm required genes type C (icaC). In addition, qPCR revealed a fluctuation in expression levels at different time points of biofilm growth of other genes, indicating that different parameter modes of growth processes are operating at different times.
    MeSH terms: Bacterial Adhesion/genetics; Bacterial Proteins/biosynthesis*; Bacterial Proteins/genetics; Humans; Microscopy, Electron, Scanning; RNA, Bacterial/genetics; RNA, Bacterial/metabolism; RNA, Messenger/genetics; RNA, Messenger/metabolism; Staphylococcal Infections/microbiology; Biofilms/growth & development*; Methicillin-Resistant Staphylococcus aureus/genetics; Methicillin-Resistant Staphylococcus aureus/metabolism; Methicillin-Resistant Staphylococcus aureus/physiology*; Real-Time Polymerase Chain Reaction
  20. Bahadoran M, Ali J, Yupapin PP
    Appl Opt, 2013 Apr 20;52(12):2866-73.
    PMID: 23669699 DOI: 10.1364/AO.52.002866
    In this paper, the bifurcation behavior of light in the PANDA ring resonator is investigated using the signal flow graph (SFG) method, where the optical transfer function for the through and drop ports of the PANDA Vernier system are derived. The optical nonlinear phenomena, such as bistability, Ikeda instability, and dynamics of light in the silicon-on-insulator (SOI) PANDA ring resonator with four couplers are studied. The transmission curves for bistability and instability as a function of the resonant mode numbers and coupling coefficients for the coupler are derived by the SFG method and simulated. The proposed system has an advantage as no optical pumping component is required. Simulated results show that closed-loop bistable switching can be generated and achieved by varying mode resonant numbers in the SOI-PANDA Vernier resonator, where a smooth and closed-loop bistable switching with low relative output/input power can be obtained and realized. The minimum through-port switching time of 1.1 ps for resonant mode numbers of 5;4;4 and minimum drop port switching time of 1.96 ps for resonant mode numbers of 9;7;7 of the PANDA Vernier resonator are achieved, which makes the PANDA Vernier resonator an operative component for optical applications, such as optical signal processing and a fast switching key in photonics integrated circuits.
    MeSH terms: Signal Processing, Computer-Assisted; Silicon; Optics and Photonics; Optical Devices; Optical Phenomena
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