Browse publications by year: 2017

  1. Lee WH, Loo CY, Leong CR, Young PM, Traini D, Rohanizadeh R
    Expert Opin Drug Deliv, 2017 08;14(8):937-957.
    PMID: 27759437 DOI: 10.1080/17425247.2017.1247804
    INTRODUCTION: The effectiveness of conventional cancer chemotherapy is hampered by the occurrence of multidrug resistance (MDR) in tumor cells. Although many studies have reported the development of novel MDR chemotherapeutic agents, clinical success is lacking owing to the high associated toxicity. Nanoparticle-based delivery of chemotherapeutic drugs has emerged as alternative approach to treat MDR cancers via exploitation of leaky vasculature in the tumor microenvironment. Accordingly, functionalization of nanoparticles with target specific ligands can be employed to achieve significant improvements in the treatment of MDR cancer. Areas covered: This review focuses on the recent advances in the functionalization of nanocarriers with specific ligands, including antibodies, transferrin, folate, and peptides to overcome MDR cancer. The limitations of effective ligand-functionalized nanoparticles as well as therapeutic successes in ligand targeting are covered in the review. Expert opinion: Targeting MDR tumors with ligand-functionalized nanoparticles is a promising approach to improve the treatment of cancer. With this approach, higher drug concentrations at targeted sites would be achieved with lower dosage frequencies and reduced side effects in comparison to existing formulations of chemotherapeutic drugs. However, potential toxicities and immunological responses to ligands should be carefully reviewed for viable options in for future MDR cancer treatment.
    MeSH terms: Animals; Antineoplastic Agents/administration & dosage*; Antineoplastic Agents/therapeutic use; Antineoplastic Agents/chemistry; Chemistry, Pharmaceutical; Humans; Ligands; Neoplasms/drug therapy*; Polymers/administration & dosage*; Polymers/therapeutic use; Polymers/chemistry; Drug Delivery Systems*; Drug Resistance, Multiple; Drug Resistance, Neoplasm; Nanoparticles/administration & dosage*; Nanoparticles/therapeutic use; Nanoparticles/chemistry
  2. Sukantamala J, Sing KW, Jaturas N, Polseela R, Wilson JJ
    PMID: 27759464 DOI: 10.1080/24701394.2016.1214728
    Certain species of Phlebotomine sandflies (Diptera: Psychodidae) are vectors of the protozoa which causes leishmaniasis. Sandflies are found breeding in enclosed places like caves. Thailand is a popular tourist destination, including for ecotourism activities like caving, which increases the risk of contact between tourists and sandflies. Surveillance of sandflies is important for monitoring this risk but identification of species based on morphology is challenged by phenotypic plasticity and cryptic diversity. DNA barcodes have been used for the identification of sandflies in Thailand. We collected sandflies using CDC light trap from four tourist caves in Northern Thailand. Female sandflies were provisionally sorted into 13 morphospecies and 19 unidentified specimens. DNA was extracted from the thorax and legs of sandflies and the DNA barcode region of cytochrome c oxidase I mtDNA amplified and sequenced. The specimens were sorted into 22 molecular operational taxonomic units (MOTU) based on the 145 DNA barcodes, which is significantly more than the morphospecies. Several of the taxa thought to be present in multiple caves, based on morphospecies sorting, split into cave-specific MOTU which likely represent cryptic species. Several MOTU reported in an earlier study from Wihan Cave, Thailand, were also found in these caves. This supports the use of DNA barcodes to investigate species diversity of sandflies and their useful role in surveillance of sandflies in Thailand.
    MeSH terms: Animals; Electron Transport Complex IV/genetics; Female; Phylogeny*; Psychodidae/classification; Psychodidae/enzymology; Psychodidae/genetics*; Genetic Variation*; Sequence Analysis, DNA; Genes, Mitochondrial*; DNA Barcoding, Taxonomic
  3. Lilford RJ, Oyebode O, Satterthwaite D, Melendez-Torres GJ, Chen YF, Mberu B, et al.
    Lancet, 2017 02 04;389(10068):559-570.
    PMID: 27760702 DOI: 10.1016/S0140-6736(16)31848-7
    In the first paper in this Series we assessed theoretical and empirical evidence and concluded that the health of people living in slums is a function not only of poverty but of intimately shared physical and social environments. In this paper we extend the theory of so-called neighbourhood effects. Slums offer high returns on investment because beneficial effects are shared across many people in densely populated neighbourhoods. Neighbourhood effects also help explain how and why the benefits of interventions vary between slum and non-slum spaces and between slums. We build on this spatial concept of slums to argue that, in all low-income and-middle-income countries, census tracts should henceforth be designated slum or non-slum both to inform local policy and as the basis for research surveys that build on censuses. We argue that slum health should be promoted as a topic of enquiry alongside poverty and health.
    MeSH terms: Health Policy*; Humans; Poverty Areas*; Residence Characteristics*; Socioeconomic Factors
  4. Ezeh A, Oyebode O, Satterthwaite D, Chen YF, Ndugwa R, Sartori J, et al.
    Lancet, 2017 02 04;389(10068):547-558.
    PMID: 27760703 DOI: 10.1016/S0140-6736(16)31650-6
    Massive slums have become major features of cities in many low-income and middle-income countries. Here, in the first in a Series of two papers, we discuss why slums are unhealthy places with especially high risks of infection and injury. We show that children are especially vulnerable, and that the combination of malnutrition and recurrent diarrhoea leads to stunted growth and longer-term effects on cognitive development. We find that the scientific literature on slum health is underdeveloped in comparison to urban health, and poverty and health. This shortcoming is important because health is affected by factors arising from the shared physical and social environment, which have effects beyond those of poverty alone. In the second paper we will consider what can be done to improve health and make recommendations for the development of slum health as a field of study.
    MeSH terms: Humans; Poverty Areas*; Socioeconomic Factors; Health Status Disparities*
  5. Lo TS, Lin YH, Chu HC, Cortes EF, Pue LB, Tan YL, et al.
    J Obstet Gynaecol Res, 2017 Jan;43(1):173-178.
    PMID: 27762470 DOI: 10.1111/jog.13158
    AIM: By investigating the association of urodynamics and urogenital nerve growth factor (NGF) levels in vaginal mesh surgery, we may be able to associate the likelihood of postoperative lower urinary tract symptoms developing as a result of synthetic mesh implanted for pelvic floor reconstructive surgery.

    METHODS: Thirty-eight female Sprague-Dawley rats were divided into three groups: mesh, sham (no mesh), and control. Urodynamic study and NGF analysis of the urogenital tissues were done and results were compared among all groups. The urodynamic studies of the mesh and sham groups were further divided into the 4th and 10th days. A P-value 

    MeSH terms: Animals; Urinary Bladder/surgery; Disease Models, Animal; Female; Humans; Inflammation/complications; Inflammation/metabolism; Postoperative Complications; Urogenital Surgical Procedures/methods*; Surgical Mesh*; Urodynamics*; Vagina/surgery; Rats, Sprague-Dawley; Pelvic Floor/surgery; Reconstructive Surgical Procedures; Nerve Growth Factor/metabolism*; Rats; Pelvic Organ Prolapse/surgery*; Lower Urinary Tract Symptoms/surgery*
  6. Phan CS, Vairappan CS
    Nat Prod Res, 2017 Apr;31(7):742-748.
    PMID: 27750446 DOI: 10.1080/14786419.2016.1241997
    Four new bicyclogermacrenes, capgermacrenes D (1) E (2) F (3) and G (4) were isolated from a population of Bornean soft coral Capnella imbricata. The structures of these metabolites were elucidated based on their nuclear magnetic resonance and high-resolution electrospray ionisation mass spectrometry spectral data. These compounds showed bacteriastatic and bacteriacidal activities against Staphylococcus aureus and methicillin-resistant Staphylococcus aureus.
    MeSH terms: Animals; Anti-Bacterial Agents/isolation & purification; Anti-Bacterial Agents/pharmacology*; Anti-Bacterial Agents/chemistry; Borneo; Drug Evaluation, Preclinical/methods; Magnetic Resonance Spectroscopy; Sesquiterpenes/isolation & purification*; Sesquiterpenes/pharmacology*; Sesquiterpenes/chemistry; Staphylococcus aureus/drug effects; Molecular Structure; Spectrometry, Mass, Electrospray Ionization; Anthozoa/chemistry*; Methicillin-Resistant Staphylococcus aureus/drug effects
  7. Veeramuthu V, Narayanan V, Ramli N, Hernowo A, Waran V, Bondi MW, et al.
    World Neurosurg, 2017 Jan;97:416-423.
    PMID: 27751922 DOI: 10.1016/j.wneu.2016.10.041
    OBJECTIVE: To compare the extent of persistent neuropsychological impairment in patients with complicated mild traumatic brain injury (mTBI) and those with uncomplicated mTBI.

    METHODS: Sixty-one patients with mTBI (Glasgow Coma Scale score 13-15) were recruited prospectively, categorized according to baseline computed tomography findings, and subjected to neuropsychological assessment at initial admission (n = 61) as well as at a 6-month follow-up (n = 30). The paired t test, Cohen's d effect size calculation, and repeated-measures analysis of variance were used to establish the differences between the 2 groups in terms of neuropsychological performance.

    RESULTS: A trend toward poorer neuropsychological performance among the patients with complicated mTBI was observed during admission; however, performance in this group improved over time. In contrast, the uncomplicated mTBI group showed slower recovery, especially in tasks of memory, visuospatial processing, and executive functions, at follow-up.

    CONCLUSIONS: Our findings suggest that despite the broad umbrella designation of mTBI, the current classification schemes of injury severity for mild neurotrauma should be revisited. They also raise questions about the clinical relevance of both traumatic focal lesions and the absence of visible traumatic lesions on brain imaging studies in patients with milder forms of head trauma.

    MeSH terms: Adult; Brain Concussion/diagnosis; Brain Concussion/epidemiology*; Brain Concussion/psychology; Cognition Disorders/diagnosis; Cognition Disorders/epidemiology*; Cognition Disorders/psychology; Female; Humans; Malaysia/epidemiology; Male; Nervous System Diseases/diagnosis; Nervous System Diseases/epidemiology*; Nervous System Diseases/psychology; Risk Factors; Trauma Severity Indices*; Comorbidity; Causality; Incidence; Treatment Outcome
  8. Hempolchom C, Yasanga T, Wijit A, Taai K, Dedkhad W, Srisuka W, et al.
    Parasitol Res, 2017 Jan;116(1):143-153.
    PMID: 27752768
    Antennal sensilla were first investigated in the eight medically and veterinary important Anopheles mosquito species (Anopheles argyropus, Anopheles crawfordi, Anopheles nigerrimus, Anopheles nitidus, Anopheles paraliae (= Anopheles lesteri), Anopheles peditaeniatus, Anopheles pursati, and Anopheles sinensis) of the Hyrcanus Group in Thailand, using scanning electron microscopy (SEM). Four types of sensilla, including sensilla chaetica (large and small), sensilla trichodea (sharp- and blunt-tipped), sensilla basiconica or grooved pegs (types I, II, and III), and sensilla coeloconica (large and small), were observed on the female antennae of the eight species. The greatest number of sensilla found along the flagellum of all the Anopheles species consisted of sensilla trichodea. Grooved pegs type II were not found on the antennae of An. peditaeniatus. Interestingly, clusters of 10-15 grooved pegs type III, with blunt-tipped and unevenly grooved-lengthwise sensilla, and a sunken group of 7-12 grooved pegs type III, with slightly curved and point-tipped sensilla, were found distally on flagellomeres 3-7 of An. argyropus and An. peditaeniatus, respectively. In addition, the key for species identification, based on fine structure and morphometrics of antennal sensilla among the eight species, was constructed and differentiated successfully. However, in order to focus intensively on the exact function of these sensilla, further electrophysiological study is needed in understanding their significant role in mosquito behavior, especially when these insects seek hosts for transmitting pathogens to humans.
    MeSH terms: Animals; Anopheles/classification; Anopheles/physiology; Anopheles/ultrastructure*; Female; Microscopy, Electron, Scanning; Thailand; Sensilla/ultrastructure*
  9. Shafie AA, Ng CH, Tan YP, Chaiyakunapruk N
    Pharmacoeconomics, 2017 02;35(2):141-162.
    PMID: 27752998 DOI: 10.1007/s40273-016-0456-2
    BACKGROUND: Insulin analogues have a pharmacokinetic advantage over human insulin and are increasingly used to treat diabetes mellitus. A summary of their cost effectiveness versus other available treatments was required.

    OBJECTIVE: Our objective was to systematically review the published cost-effectiveness studies of insulin analogues for the treatment of patients with type 1 diabetes mellitus (T1DM) and type 2 diabetes mellitus (T2DM).

    METHODS: We searched major databases and health technology assessment agency reports for economic evaluation studies published up until 30 September 2015. Two reviewers performed data extraction and assessed the quality of the data using the CHEERS (Consolidated Health Economic Evaluation Reporting Standards) guidelines.

    RESULTS: Seven of the included studies assessed short-acting insulin analogues, 12 assessed biphasic insulin analogues, 30 assessed long-acting insulin analogues and one assessed a combination of short- and long-acting insulin analogues. Only 17 studies involved patients with T1DM, all were modelling studies and 12 were conducted in Canada. The incremental cost-effectiveness ratios (ICERs) for short-acting insulin analogues ranged from dominant to $US435,913 per quality-adjusted life-year (QALY) gained, the ICERs for biphasic insulin analogues ranged from dominant to $US57,636 per QALY gained and the ICERs for long-acting insulin analogues ranged from dominant to $US599,863 per QALY gained. A total of 15 studies met all the CHEERS guidelines reporting quality criteria. Only 26 % of the studies assessed heterogeneity in their analyses.

    CONCLUSION: Current evidence indicates that insulin analogues are cost effective for T1DM; however, evidence for their use in T2DM is not convincing. Additional evidence regarding compliance and efficacy is required to support the broader use of long-acting and biphasic insulin analogues in T2DM. The value of insulin analogues depends strongly on reductions in hypoglycaemia event rates and its efficacy in lowering glycated haemoglobin (HbA1c).

    MeSH terms: Canada; Cost-Benefit Analysis; Delayed-Action Preparations; Diabetes Mellitus, Type 1/drug therapy*; Diabetes Mellitus, Type 1/economics; Diabetes Mellitus, Type 2/drug therapy*; Diabetes Mellitus, Type 2/economics; Hemoglobin A, Glycosylated/metabolism; Humans; Hypoglycemic Agents/administration & dosage; Hypoglycemic Agents/economics; Quality-Adjusted Life Years; Insulins/administration & dosage*; Insulins/economics
  10. James RJE, O'Malley C, Tunney RJ
    Br J Psychol, 2017 Aug;108(3):608-625.
    PMID: 27753063 DOI: 10.1111/bjop.12226
    This manuscript reviews the extant literature on key issues related to mobile gambling and considers whether the potential risks of harm emerging from this platform are driven by pre-existing comorbidities or by psychological processes unique to mobile gambling. We propose an account based on associative learning that suggests this form of gambling is likely to show distinctive features compared with other gambling technologies. Smartphones are a rapidly growing platform on which individuals can gamble using specifically designed applications, adapted websites or text messaging. This review considers how mobile phone use interacts with psychological processes relevant to gambling, the games users are likely to play on smartphones, and the interactions afforded by smartphones. Our interpretation of the evidence is that the schedules of reinforcement found in gambling interact with the ways in which people tend to use smartphones that may expedite the acquisition of maladaptive learned behaviours such as problem gambling. This account is consistent with existing theories and frameworks of problem gambling and has relevance to other forms of mobile phone use.
    MeSH terms: Conditioning, Classical/physiology; Gambling/epidemiology; Gambling/psychology*; Humans; Reinforcement (Psychology); Risk; Text Messaging; Mobile Applications
  11. Teoh JB, Yee A, Danaee M, Ng CG, Sulaiman AH
    J Addict Med, 2017 Jan-Feb 6;11(1):40-46.
    PMID: 27753719 DOI: 10.1097/ADM.0000000000000267
    OBJECTIVES: Erectile dysfunction (ED) is a problem commonly encountered by patients on methadone maintenance therapy (MMT). This study aimed to assess the prevalence of ED among this group of patients along with its risk factors and association with quality of life (QOL).
    METHODS: Male patients on MMT in a tertiary hospital in Malaysia were included in the study. A total of 134 patients with sexual partners were assessed for ED using the International Index of Erectile Function. Patients were assessed for substance use using Opiate Treatment Index (OTI) and depression using the Malay version of the self-rated Montgomery-Asberg Depression Rating Scale (MADRS-BM). QOL was evaluated using World Health Organisation Quality of Life (WHOQOL)-BREF.
    RESULTS: The prevalence of ED among patients on MMT was 67%, with 26.1% having mild ED, 30.4% having mild-to-moderate ED, 7.0% having moderate ED, and 17.2% having severe ED. Patients with depression were 4 times more likely to have ED compared with patients without depression, whereas increasing age significantly correlated with the severity of ED. Having ED predicted a poorer QOL in the social relationships domain.
    CONCLUSION: Depression is highly associated with ED, which negatively influences the social aspect of QOL among patients on methadone maintenance therapy.
    Study site: outpatient addiction psychiatric clinic, University Malaya Medical Centre (UMMC), Kuala Lumpur, Malaysia
    MeSH terms: Adult; Cross-Sectional Studies; Hospitals, University; Humans; Erectile Dysfunction*; Malaysia; Male; Methadone*; Outpatient Clinics, Hospital; Quality of Life; Prevalence
  12. Muhammad SN, Kusin FM, Md Zahar MS, Mohamat Yusuff F, Halimoon N
    Environ Technol, 2017 Aug;38(16):2003-2012.
    PMID: 27745113 DOI: 10.1080/09593330.2016.1244568
    Passive bioremediation of metal- and sulfate-containing acid mine drainage (AMD) has been investigated in a batch study. Multiple substrates were used in the AMD remediation using spent mushroom compost (SMC), limestone, activated sludge (AS), and woodchips (WC) under anoxic conditions suitable for bacterial sulfate reduction (BSR). Limestones used were of crushed limestone (CLS) and uncrushed limestone, provided at two different ratios in mixed substrates treatment and varied by the proportion of SMC and limestone. The SMC greatly assisted the removals of sulfate and metals and also acted as an essential carbon source for BSR. The mixed substrate composed of 40% CLS, 30% SMC, 20% AS, and 10% WC was found to be effective for metal removal. Mn, Cu, Pb, and Zn were greatly removed (89-100%) in the mixed substrates treatment, while Fe was only removed at 65%. Mn was found to be removed at a greatly higher rate than Fe, suggesting important Mn adsorption onto organic materials, that is, greater sorption affinity to the SMC. Complementary with multiple treatment media was the main mechanism assisting the AMD treatment through microbial metal reduction reactions.
    MeSH terms: Agaricales*; Biodegradation, Environmental*; Calcium Carbonate; Metals; Mining*; Soil; Sulfates; Water Pollutants, Chemical*
  13. Ali Z, Alsulaiman M, Muhammad G, Elamvazuthi I, Al-Nasheri A, Mesallam TA, et al.
    J Voice, 2017 May;31(3):386.e1-386.e8.
    PMID: 27745756 DOI: 10.1016/j.jvoice.2016.09.009
    A large population around the world has voice complications. Various approaches for subjective and objective evaluations have been suggested in the literature. The subjective approach strongly depends on the experience and area of expertise of a clinician, and human error cannot be neglected. On the other hand, the objective or automatic approach is noninvasive. Automatic developed systems can provide complementary information that may be helpful for a clinician in the early screening of a voice disorder. At the same time, automatic systems can be deployed in remote areas where a general practitioner can use them and may refer the patient to a specialist to avoid complications that may be life threatening. Many automatic systems for disorder detection have been developed by applying different types of conventional speech features such as the linear prediction coefficients, linear prediction cepstral coefficients, and Mel-frequency cepstral coefficients (MFCCs). This study aims to ascertain whether conventional speech features detect voice pathology reliably, and whether they can be correlated with voice quality. To investigate this, an automatic detection system based on MFCC was developed, and three different voice disorder databases were used in this study. The experimental results suggest that the accuracy of the MFCC-based system varies from database to database. The detection rate for the intra-database ranges from 72% to 95%, and that for the inter-database is from 47% to 82%. The results conclude that conventional speech features are not correlated with voice, and hence are not reliable in pathology detection.
    MeSH terms: Diagnosis, Computer-Assisted/methods*; Humans; Language*; Pattern Recognition, Automated; Predictive Value of Tests; Signal Processing, Computer-Assisted*; Speech Acoustics*; Speech Production Measurement/methods*; Voice Disorders/diagnosis*; Voice Disorders/physiopathology; Voice Quality*; Reproducibility of Results; Databases, Factual
  14. Leong YK, Lan JC, Loh HS, Ling TC, Ooi CW, Show PL
    J Biosci Bioeng, 2017 Mar;123(3):370-375.
    PMID: 27745851 DOI: 10.1016/j.jbiosc.2016.09.007
    Polyhydroxyalkanoates (PHAs), a class of renewable and biodegradable green polymers, have gained attraction as a potential substitute for the conventional plastics due to the increasing concern towards environmental pollution as well as the rapidly depleting petroleum reserve. Nevertheless, the high cost of downstream processing of PHA has been a bottleneck for the wide adoption of PHAs. Among the options of PHAs recovery techniques, aqueous two-phase extraction (ATPE) outshines the others by having the advantages of providing a mild environment for bioseparation, being green and non-toxic, the capability to handle a large operating volume and easily scaled-up. Utilizing unique properties of thermo-responsive polymer which has decreasing solubility in its aqueous solution as the temperature rises, cloud point extraction (CPE) is an ATPE technique that allows its phase-forming component to be recycled and reused. A thorough literature review has shown that this is the first time isolation and recovery of PHAs from Cupriavidus necator H16 via CPE was reported. The optimum condition for PHAs extraction (recovery yield of 94.8% and purification factor of 1.42 fold) was achieved under the conditions of 20 wt/wt % ethylene oxide-propylene oxide (EOPO) with molecular weight of 3900 g/mol and 10 mM of sodium chloride addition at thermoseparating temperature of 60°C with crude feedstock limit of 37.5 wt/wt %. Recycling and reutilization of EOPO 3900 can be done at least twice with satisfying yield and PF. CPE has been demonstrated as an effective technique for the extraction of PHAs from microbial crude culture.
    MeSH terms: Cell Extracts/chemistry*; Epoxy Compounds/chemistry; Ethylene Oxide/chemistry; Chemical Fractionation/methods*; Molecular Weight; Temperature*; Water/chemistry*; Cupriavidus necator/chemistry*; Polyhydroxyalkanoates/isolation & purification*; Polyhydroxyalkanoates/chemistry*; Recycling
  15. Darajeh N, Idris A, Fard Masoumi HR, Nourani A, Truong P, Rezania S
    Int J Phytoremediation, 2017 May 04;19(5):413-424.
    PMID: 27748626 DOI: 10.1080/15226514.2016.1244159
    Artificial neural networks (ANNs) have been widely used to solve the problems because of their reliable, robust, and salient characteristics in capturing the nonlinear relationships between variables in complex systems. In this study, ANN was applied for modeling of Chemical Oxygen Demand (COD) and biodegradable organic matter (BOD) removal from palm oil mill secondary effluent (POMSE) by vetiver system. The independent variable, including POMSE concentration, vetiver slips density, and removal time, has been considered as input parameters to optimize the network, while the removal percentage of COD and BOD were selected as output. To determine the number of hidden layer nodes, the root mean squared error of testing set was minimized, and the topologies of the algorithms were compared by coefficient of determination and absolute average deviation. The comparison indicated that the quick propagation (QP) algorithm had minimum root mean squared error and absolute average deviation, and maximum coefficient of determination. The importance values of the variables was included vetiver slips density with 42.41%, time with 29.8%, and the POMSE concentration with 27.79%, which showed none of them, is negligible. Results show that the ANN has great potential ability in prediction of COD and BOD removal from POMSE with residual standard error (RSE) of less than 0.45%.
    MeSH terms: Biodegradation, Environmental; Industrial Waste/analysis*; Malaysia; Plant Oils; Waste Disposal, Fluid/instrumentation; Waste Disposal, Fluid/methods*; Water Pollutants, Chemical/metabolism*; Neural Networks (Computer)*; Vetiveria/metabolism*; Environmental Restoration and Remediation/instrumentation; Environmental Restoration and Remediation/methods*; Biological Oxygen Demand Analysis; Manufacturing Industry
  16. Tsuboi M, Lim AC, Ooi BL, Yip MY, Chong VC, Ahnesjö I, et al.
    J Evol Biol, 2017 Jan;30(1):150-160.
    PMID: 27748990 DOI: 10.1111/jeb.12995
    Brain size varies greatly at all taxonomic levels. Feeding ecology, life history and sexual selection have been proposed as key components in generating contemporary diversity in brain size across vertebrates. Analyses of brain size evolution have, however, been limited to lineages where males predominantly compete for mating and females choose mates. Here, we present the first original data set of brain sizes in pipefishes and seahorses (Syngnathidae) a group in which intense female mating competition occurs in many species. After controlling for the effect of shared ancestry and overall body size, brain size was positively correlated with relative snout length. Moreover, we found that females, on average, had 4.3% heavier brains than males and that polyandrous species demonstrated more pronounced (11.7%) female-biased brain size dimorphism. Our results suggest that adaptations for feeding on mobile prey items and sexual selection in females are important factors in brain size evolution of pipefishes and seahorses. Most importantly, our study supports the idea that sexual selection plays a major role in brain size evolution, regardless of on which sex sexual selection acts stronger.
    MeSH terms: Animals; Brain/anatomy & histology*; Ecology*; Female; Male; Organ Size; Sexual Behavior; Sexual Behavior, Animal*; Sex Characteristics; Smegmamorpha/anatomy & histology*
  17. Wu YS, Chung I, Wong WF, Masamune A, Sim MS, Looi CY
    Biochim Biophys Acta Gen Subj, 2017 Feb;1861(2):296-306.
    PMID: 27750041 DOI: 10.1016/j.bbagen.2016.10.006
    BACKGROUND: We previously showed that pancreatic stellate cells (PSC) secreted interleukin (IL)-6 and promoted pancreatic ductal adenocarcinoma (PDAC) cell proliferation via nuclear factor erythroid 2 (Nrf2)-mediated metabolic reprogramming. Epithelial-mesenchymal transition (EMT) is a key process for the metastatic cascade. To study the mechanism of PDAC progression to metastasis, we investigated the role of PSC-secreted IL-6 in activating EMT and the involvement of Nrf2 in this process.

    METHODS: Gene expression of IL-6 and IL-6Rα in PSC and PDAC cells was measured with qRT-PCR. The role of PSC-secreted IL-6, JAK/Stat3 signaling, and Nrf2 mediation on EMT-related genes expression was also examined with qRT-PCR. EMT phenotypes were assessed with morphological change, wound healing, migration, and invasion.

    RESULTS: PSC expressed higher mRNA levels of IL-6 but lower IL-6Rα compared to PDAC cells. Neutralizing IL-6 in PSC secretion reduced mesenchymal-like morphology, migration and invasion capacity, and mesenchymal-like gene expression of N-cadherin, vimentin, fibronectin, collagen I, Sip1, Snail, Slug, and Twist2. Inhibition of JAK/Stat3 signaling induced by IL-6 repressed EMT and Nrf2 gene expression. Induction of Nrf2 activity by tert-butylhydroquinone (tBHQ) increased both EMT phenotypes and gene expression (N-cadherin, fibronectin, Twist2, Snail, and Slug) repressed by IL-6 neutralizing antibody. Simultaneous inhibition of Nrf2 expression with siRNA and Stat3 signaling further repressed EMT gene expression, indicating that Stat3/Nrf2 pathway mediates EMT induced by IL-6.

    CONCLUSIONS: IL-6 from PSC promotes EMT in PDAC cells via Stat3/Nrf2 pathway.

    GENERAL SIGNIFICANCE: Targeting Stat3/Nrf2 pathway activated by PSC-secreted IL-6 may provide a novel therapeutic option to improve the prognosis of PDAC.

    MeSH terms: Cell Movement/physiology; Humans; Neoplasm Invasiveness/pathology; Pancreatic Neoplasms/metabolism*; Pancreatic Neoplasms/pathology; Wound Healing/physiology; Signal Transduction/physiology*; Interleukin-6/metabolism*; Gene Expression Regulation, Neoplastic/physiology; Paracrine Communication/physiology; Carcinoma, Pancreatic Ductal/metabolism; Carcinoma, Pancreatic Ductal/pathology; Cell Line, Tumor; Cell Proliferation/physiology; STAT3 Transcription Factor/metabolism*; NF-E2-Related Factor 2/metabolism*; Epithelial-Mesenchymal Transition/physiology*; Pancreatic Stellate Cells/metabolism; Pancreatic Stellate Cells/pathology*
  18. Lee SL, Ho LN, Ong SA, Wong YS, Voon CH, Khalik WF, et al.
    Chemosphere, 2017 Jan;166:118-125.
    PMID: 27693872 DOI: 10.1016/j.chemosphere.2016.09.082
    Photocatalytic fuel cell (PFC) is a potential wastewater treatment technology that can generate electricity from the conversion of chemical energy of organic pollutants. An immobilized ZnO/Zn fabricated by sonication and heat attachment method was applied as the photoanode and Pt/C plate was used as the cathode of the PFC in this study. Factors that affect the decolorization efficiency and electricity generation of the PFC such as different initial dye concentrations and pH were investigated. Results revealed that the degradation of Reactive Green 19 (RG19) was enhanced in a closed circuit PFC compared with that of a opened circuit PFC. Almost 100% decolorization could be achieved in 8 h when 250 mL of 30 mg L(-1) of RG19 was treated in a PFC without any supporting electrolyte. The highest short circuit current of 0.0427 mA cm(-2) and maximum power density of 0.0102 mW cm(-2) was obtained by PFC using 30 mg L(-1) of RG19. The correlation between dye degradation, conductivity and voltage output were also investigated and discussed.
    MeSH terms: Azo Compounds/isolation & purification; Azo Compounds/chemistry*; Coloring Agents/isolation & purification; Coloring Agents/chemistry*; Electrodes; Electric Power Supplies*; Zinc/chemistry*; Zinc Oxide/chemistry*; Water Purification/instrumentation; Water Purification/methods*; Photochemical Processes*; Waste Water/chemistry
  19. Carter BE, Larraín J, Manukjanová A, Shaw B, Shaw AJ, Heinrichs J, et al.
    Mol Phylogenet Evol, 2017 02;107:16-26.
    PMID: 27744015 DOI: 10.1016/j.ympev.2016.10.002
    Frullania subgenus Microfrullania is a clade of ca. 15 liverwort species occurring in Australasia, Malesia, and southern South America. We used combined nuclear and chloroplast sequence data from 265 ingroup accessions to test species circumscriptions and estimate the biogeographic history of the subgenus. With dense infra-specific sampling, we document an important role of long-distance dispersal in establishing phylogeographic patterns of extant species. At deeper time scales, a combination of phylogenetic analyses, divergence time estimation and ancestral range estimation were used to reject vicariance and to document the role of long-distance dispersal in explaining the evolution and biogeography of the clade across the southern Hemisphere. A backbone phylogeny for the subgenus is proposed, providing insight into evolution of morphological patterns and establishing the basis for an improved sectional classification of species within Microfrullania. Several species complexes are identified, the presence of two undescribed but genetically and morphologically distinct species is noted, and previously neglected names are discussed.
    MeSH terms: Biological Evolution; Phylogeny; South America; Sequence Analysis, DNA; DNA, Plant/isolation & purification; DNA, Plant/metabolism; Frullania/anatomy & histology; Frullania/classification*; Frullania/genetics; Australasia; Genetic Loci; Phylogeography
  20. Fransen HP, Boer JMA, Beulens JWJ, de Wit GA, Bueno-de-Mesquita HB, Hoekstra J, et al.
    Eur J Public Health, 2017 04 01;27(2):274-278.
    PMID: 27744349 DOI: 10.1093/eurpub/ckw190
    Background: : Unhealthy dietary patterns have been associated with other unhealthy lifestyle factors such as smoking and physical inactivity. Whether these associations are similar in high- and low-educated individuals is currently unknown.

    Methods: We used information of the EPIC-NL cohort, a prospective cohort of 39 393 men and women, aged 20-70 years at recruitment. A lifestyle questionnaire and a validated food frequency questionnaire were administered at recruitment (1993-97). Low adherence to a Mediterranean-style diet was used to determine an unhealthy dietary pattern. Lifestyle-related factors included body mass index, waist circumference, smoking status, physical activity level, dietary supplement use and daily breakfast consumption. Multivariate logistic regression analyses were performed for the total population and by strata of educational level.

    Results: In total 30% of the study population had an unhealthy dietary pattern: 39% in the lowest educated group and 20% in the highest educated group. Physical inactivity, a large waist circumference, no dietary supplement use and skipping breakfast were associated with an unhealthy dietary pattern in both low and high educated participants. Among low educated participants, current smokers had a greater odds of an unhealthy diet compared with never smokers: OR 1.42 (95% CI: 1.25; 1.61). This association was not observed in the high educated group.

    Conclusions: Most associations between lifestyle-related factors and unhealthy diet were consistent across educational levels, except for smoking. Only among low educated participants, current smokers reported an unhealthier dietary pattern in comparison to never smokers. These results can be used in the development of targeted health promotion strategies.

    MeSH terms: Adult; Aged; Diet/methods*; Diet/statistics & numerical data; Educational Status*; Female; Humans; Life Style*; Male; Middle Aged; Prospective Studies; Surveys and Questionnaires; Risk Factors; Cohort Studies; Young Adult
External Links