Browse publications by year: 2018

  1. Yee A, Loh HS, Ng CG, Sulaiman AH
    Am J Mens Health, 2018 07;12(4):1016-1022.
    PMID: 29493379 DOI: 10.1177/1557988318759197
    Low sexual desire (SD) is not life threatening, but its negative impact on the quality of life and intimacy of a relationship among the patients on methadone maintenance therapy (MMT) is significant. This cross-sectional study involved 183 men on MMT who were interviewed and who completed the Malay version of the SDI-2 (SDI-2-BM), the Malay version of the self-rated Montgomery-Asberg Depression Rating Scale (MADRS-BM) and World Health Organization Quality of Life-BREF Scale (WHOQOL-BREF) questionnaires. Findings showed 32.8% ( n = 60) participants had low SD. Those who were older, had sexual partners, and were smokers achieved lower scores in both dyadic SD (≤24) and solitary SD (≤6), and suffered lower quality of life in their social relationship. MMT is very cost-effective in rehabilitating opioid dependence; however, as clinicians, we need to address and manage the issues of low SD and depression among patients on MMT, especially the older men.
    MeSH terms: Adult; Age Factors; Cross-Sectional Studies; Follow-Up Studies; Humans; Libido/drug effects*; Malaysia; Male; Methadone/adverse effects; Methadone/therapeutic use*; Middle Aged; Opioid-Related Disorders/complications; Opioid-Related Disorders/drug therapy*; Quality of Life*; Sexual Behavior/drug effects*; Sexual Behavior/psychology; Logistic Models; Odds Ratio; Risk Assessment; Opiate Substitution Treatment/adverse effects*; Opiate Substitution Treatment/methods
  2. Pachaiappan R, Tamboli E, Acharya A, Su CH, Gopinath SCB, Chen Y, et al.
    PLoS One, 2018;13(3):e0193717.
    PMID: 29494663 DOI: 10.1371/journal.pone.0193717
    Enzyme hydrolysates (trypsin, papain, pepsin, α-chymotrypsin, and pepsin-pancreatin) of Tinospora cordifolia stem proteins were analyzed for antioxidant efficacy by measuring (1) 1,1-diphenyl-2-picrylhydrazyl (DPPH•) radical scavenging activity, (2) 2,20-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS+) radical scavenging capacity, and (3) Fe2+ chelation. Trypsin hydrolysate showed the strongest DPPH• scavenging, while α-chymotrypsin hydrolysate exhibited the highest ABTS+ scavenging and Fe2+ chelation. Undigested protein strongly inhibited the gastrointestinal enzymes, trypsin (50% inhibition at enzyme/substrate ratio = 1:6.9) and α-chymotrypsin (50% inhibition at enzyme/substrate ratio = 1:1.82), indicating the prolonged antioxidant effect after ingestion. Furthermore, gel filtration purified peptide fractions of papain hydrolysates exhibited a significantly higher ABTS+ and superoxide radical scavenging as compared to non-purified digests. Active fraction 9 showing the highest radical scavenging ability was further purified and confirmed by MALDI-TOF MS followed by MS/MS with probable dominant peptide sequences identified are VLYSTPVKMWEPGR, VITVVATAGSETMR, and HIGININSR. The obtained results revealed that free radical scavenging capacity of papain hydrolysates might be related to its consistently low molecular weight hydrophobic peptides.
    MeSH terms: Antioxidants; Chymotrypsin/metabolism; Hydrolysis; Papain/metabolism; Pepsin A/metabolism; Peptides/analysis*; Peptides/chemistry; Plant Extracts/analysis; Plant Extracts/chemistry; Trypsin/metabolism; Free Radical Scavengers/analysis*; Free Radical Scavengers/chemistry; Tinospora/chemistry*
  3. Greenwood MP, Greenwood M, Romanova EV, Mecawi AS, Paterson A, Sarenac O, et al.
    Neurobiol Aging, 2018 05;65:178-191.
    PMID: 29494864 DOI: 10.1016/j.neurobiolaging.2018.01.008
    Elderly people exhibit a diminished capacity to cope with osmotic challenges such as dehydration. We have undertaken a detailed molecular analysis of arginine vasopressin (AVP) biosynthetic processes in the supraoptic nucleus (SON) of the hypothalamus and secretory activity in the posterior pituitary of adult (3 months) and aged (18 months) rats, to provide a comprehensive analysis of age-associated changes to the AVP system. By matrix-assisted laser desorption/ionization time-of-flight mass spectrometry analysis, we identified differences in pituitary peptides, including AVP, in adult and aged rats under both basal and dehydrated states. In the SON, increased Avp gene transcription, coincided with reduced Avp promoter methylation in aged rats. Based on transcriptome data, we have previously characterized a number of novel dehydration-induced regulatory factors involved in the response of the SON to osmotic cues. We found that some of these increase in expression with age, while dehydration-induced expression of these genes in the SON was attenuated in aged rats. In summary, we show that aging alters the rat AVP system at the genome, transcriptome, and peptidome levels. These alterations however did not affect circulating levels of AVP in basal or dehydrated states.
    MeSH terms: Aging/metabolism*; Animals; Arginine Vasopressin/biosynthesis*; Arginine Vasopressin/genetics*; Arginine Vasopressin/secretion; Dehydration/genetics*; Dehydration/metabolism*; Male; Methylation; Neurosecretory Systems/metabolism*; Osmolar Concentration; Pituitary Gland, Posterior/secretion; Promoter Regions, Genetic; Mass Spectrometry/methods; Supraoptic Nucleus/metabolism*; Transcription, Genetic; Genome/genetics; Rats, Wistar; Transcriptome/genetics; Osmoregulation/physiology*
  4. Harapan H, Rajamoorthy Y, Anwar S, Bustamam A, Radiansyah A, Angraini P, et al.
    BMC Infect Dis, 2018 02 27;18(1):96.
    PMID: 29486714 DOI: 10.1186/s12879-018-3006-z
    BACKGROUND: The Indonesian region of Aceh was the area most severely affected by the earthquake and tsunami of 26 December 2004. Department of Health data reveal an upward trend of dengue cases in Aceh since the events of the tsunami. Despite the increasing incidence of dengue in the region, there is limited understanding of dengue among the general population of Aceh. The aim of this study was to assess the knowledge, attitude, and practice (KAP) regarding dengue among the people of Aceh, Indonesia in order to design intervention strategies for an effective dengue prevention program.

    METHODS: A community-based cross-sectional study was conducted in Aceh between November 2014 and March 2015 with a total of 609 participants living in seven regencies and two municipalities. Information on the socio-demographic characteristics of participants and their KAP regarding dengue was collected using a pre-tested structured questionnaire. The KAP status (good vs. poor) of participants with different socio-demographic characteristics was compared using Chi Square-test, ANOVA or Fisher's exact test as appropriate. Logistic regression analysis was used to determine the predictors of each KAP domain.

    RESULTS: We found that 45% of participants had good knowledge regarding dengue and only 32% had good attitudes and good dengue preventive practices. There was a significant positive correlation between knowledge and attitudes, knowledge and practice, and attitudes and practice. In addition, people who had good knowledge were 2.7 times more likely to have good attitudes, and people who had good attitudes were 2.2 times more likely to have good practices regarding dengue. The level of education, occupation, marital status, monthly income, socioeconomic status (SES) and living in the city were associated with the knowledge level. Occupation, SES, and having experienced dengue fever were associated with attitudes. Education, occupation, SES and type of residence were associated with preventive practices.

    CONCLUSION: Our study suggests that dengue prevention programs are required to increase KAP levels regarding dengue in the communities of Aceh.

    MeSH terms: Adult; Cross-Sectional Studies; Family Characteristics; Female; Housing/statistics & numerical data; Humans; Income/statistics & numerical data; Indonesia/epidemiology; Health Knowledge, Attitudes, Practice*; Male; Occupations/statistics & numerical data; Surveys and Questionnaires; Social Class; Young Adult
  5. Barber BE, Russell B, Grigg MJ, Zhang R, William T, Amir A, et al.
    Blood Adv, 2018 02 27;2(4):433-443.
    PMID: 29487058 DOI: 10.1182/bloodadvances.2017013730
    The simian parasite Plasmodium knowlesi can cause severe and fatal human malaria. However, little is known about the pathogenesis of this disease. In falciparum malaria, reduced red blood cell deformability (RBC-D) contributes to microvascular obstruction and impaired organ perfusion. In P knowlesi infection, impaired microcirculatory flow has been observed in Macaca mulatta (rhesus macaques), unnatural hosts who develop severe and fatal disease. However, RBC-D has not been measured in human infection or in the natural host M fascicularis (long-tailed macaques). Using ektacytometry, we measured RBC-D in adults with severe and non-severe knowlesi and falciparum malaria and in healthy controls. In addition, we used micropipette aspiration to determine the relative stiffness of infected RBCs (iRBCs) and uninfected RBCs (uRBCs) in P knowlesi-infected humans and M fascicularis Ektacytometry demonstrated that RBC-D overall was reduced in human knowlesi malaria in proportion to disease severity, and in severe knowlesi malaria, it was comparable to that of severe falciparum malaria. RBC-D correlated inversely with parasitemia and lactate in knowlesi malaria and HRP2 in falciparum malaria, and it correlated with hemoglobin nadir in knowlesi malaria. Micropipette aspiration confirmed that in humans, P knowlesi infection increased stiffness of both iRBCs and uRBCs, with the latter mostly the result of echinocytosis. In contrast, in the natural host M fascicularis, echinocyte formation was not observed, and the RBC-D of uRBCs was unaffected. In unnatural primate hosts of P knowlesi, including humans, reduced deformability of iRBCs and uRBCs may represent a key pathogenic mechanism leading to microvascular accumulation, impaired organ perfusion, and anemia.
    MeSH terms: Adult; Animals; Antigens, Protozoan; Erythrocyte Deformability*; Hemoglobins; Humans; Macaca fascicularis/parasitology; Malaria/blood*; Malaria/parasitology; Middle Aged; Protozoan Proteins; Case-Control Studies; Malaria, Falciparum/blood; Plasmodium knowlesi/pathogenicity*; Young Adult
  6. Wolff GH, Riffell JA
    J Exp Biol, 2018 02 27;221(Pt 4).
    PMID: 29487141 DOI: 10.1242/jeb.157131
    Mosquitoes are best known for their proclivity towards biting humans and transmitting bloodborne pathogens, but there are over 3500 species, including both blood-feeding and non-blood-feeding taxa. The diversity of host preference in mosquitoes is exemplified by the feeding habits of mosquitoes in the genus Malaya that feed on ant regurgitation or those from the genus Uranotaenia that favor amphibian hosts. Host preference is also by no means static, but is characterized by behavioral plasticity that allows mosquitoes to switch hosts when their preferred host is unavailable and by learning host cues associated with positive or negative experiences. Here we review the diverse range of host-preference behaviors across the family Culicidae, which includes all mosquitoes, and how adaptations in neural circuitry might affect changes in preference both within the life history of a mosquito and across evolutionary time-scales.
    MeSH terms: Animals; Biological Evolution; Feeding Behavior; Learning; Culicidae/physiology*; Nervous System Physiological Phenomena*; Olfactory Perception*
  7. Tan SC, Ismail MP, Duski DR, Othman NH, Ankathil R
    Biosci Rep, 2018 Apr 27;38(2).
    PMID: 29487170 DOI: 10.1042/BSR20171268
    Information on the prevalence and type distribution of human papillomavirus (HPV) among Malaysian women is currently limited. The present study therefore aimed to provide an updated estimate on the prevalence and type distribution of HPV among Malaysian women with and without cervical cancer. Total DNA was isolated from the cervical cell specimens of 185 histopathologically confirmed cervical cancer patients and 209 cancer-free healthy females who were tested negative in a recent Pap test. Viral-specific DNA was subsequently amplified with biotinylated primers and hybridized to HPV type-specific probes via a proprietary "flow-through hybridization" process for determination of HPV genotype. It was demonstrated that 83.2% of the cervical cancer patients and none (0.0%) of the cancer-free females were positive for HPV infection. Among HPV-positive subjects, 14 different viral genotypes were observed, namely HPV16, 18, 31, 33, 35, 45, 52, 53, 58, 66/68, 73, 81, 82, and 84/26. A total of 91.6% of the HPV-positive subjects had single-type HPV infections and the remaining 8.4% were simultaneously infected by two HPV genotypes. The most common HPV infections found were HPV16 (35.7%), HPV18 (26.0%), HPV58 (9.1%), and HPV33 (7.1%) single-type infections, followed by HPV16 + HPV18 co-infections (5.2%). The study has successfully provided an updated estimate on the prevalence and type distribution of HPV among Malaysian women with and without cervical cancer. These findings could contribute valuable information for appraisal of the impact and cost-effectiveness of prophylactic HPV vaccines in the Malaysian population.
    MeSH terms: Adult; Aged; DNA, Viral/genetics*; Female; Humans; Malaysia; Middle Aged; Prevalence; Alphapapillomavirus/genetics*
  8. Fadel A, Plunkett A, Ashworth J, Mahmoud AM, Ranneh Y, El Mohtadi M, et al.
    J Food Sci Technol, 2018 Mar;55(3):1201-1206.
    PMID: 29487463 DOI: 10.1007/s13197-017-3010-0
    Arabinoxylans (AXs) are major dietary fibre in cereals. Recently, AXs have attracted a great deal of attention because of their biological activities. These activities have been suggested to be related to the content of low molecular weight (Mw) AXs, in particular those with Mw below 32 kDa. Rice bran is a rich source of AXs. However, water extraction of AXs is difficult and often gives low yield. Extrusion processing has been used to increase the solubility of cereal dietary fibre. The aim of this research was to study the effect of extrusion screw-speeds (80 and 160) rpm on the extraction yield and Mw of water extractable AXs from rice bran. It was found that the extraction of AXs increased significantly with an increase in screw speed and was accompanied by a significant decrease in the Mw of AXs from extruded rice bran. The percentage of very low molecular weight AXs (0.79-1.58 kDa) significantly increased with increasing screw speed.
    MeSH terms: Attention; Biological Phenomena; Edible Grain; Dietary Fiber; Molecular Weight; Oryza; Solubility; Thinness; Water; Xylans
  9. Abdullah N, Chin NL, Yusof YA, Talib RA
    J Food Sci Technol, 2018 Mar;55(3):1207-1213.
    PMID: 29487464 DOI: 10.1007/s13197-017-3024-7
    The steady-state flow test was conducted on pink-fleshed guava, pink-fleshed pomelo and soursop juice concentrates using a rheometer to understand its rheological behaviour. The power law model was used and a master-curve was created using the shear rate-temperature-concentration superposition technique to predict rheological properties from a wide range of temperatures and concentrations. All three juice concentrates undergo a double horizontal shift whilst the pink-fleshed guava required an additional vertical shift. The final equations show shear-thinning behaviour of pink-fleshed guava, pink-fleshed pomelo and soursop with flow behaviour index of 0.2217, 0.7507 and 0.6347, respectively. The final master-curve predicts shear stress at wide range of shear rates, i.e. between 10-2 and 106 s-1 for the pink-fleshed guava, 100 and 106 s-1 for the pink-fleshed pomelo and 100 and 107 s-1 for the soursop. The results provide useful information and effective technique to predict fruit juice concentrates behaviour affected by heat changes during processing.
    MeSH terms: Fruit and Vegetable Juices; Fruit; Hot Temperature; Rheology; Temperature; Vegetables; Annona; Psidium
  10. Tai ELM, Ling JL, Gan EH, Adil H, Wan-Hazabbah WH
    Int J Ophthalmol, 2018;11(2):274-278.
    PMID: 29487819 DOI: 10.18240/ijo.2018.02.16
    AIM: To compare the peripapillary retinal nerve fiber layer (RNFL) thickness measuredviaoptical coherence tomography (OCT) between different groups of myopia severity and controls.

    METHODS: This was a prospective cross-sectional study. All subjects underwent a full ophthalmic examination, refraction, visual field analysis and A-scan biometry. Myopic patients were classified as low myopia (LM) [spherical equivalent (SE) from greater than -0.5 D, up to -3.0 D], moderate myopia (MM; SE greater than -3.0 D, up to -6.0 D) and high myopia (HM; SE greater than -6.0 D). The control group consisted of emmetropic (EM) patients (SE from +0.5 D to -0.5 D). A Zeiss Cirrus HD-OCT machine was used to measure the peripapillary RNFL thickness of both eyes of each subject. The mean peripapillary RNFL thickness between groups was compared using both analysis of variance and analysis of covariance.

    RESULTS: A total of 403 eyes of 403 subjects were included in this study. The mean age was 31.48±10.23y. There were 180 (44.7%) eyes with EM, 124 (30.8%) with LM, 73 (18.1%) with MM and 26 (6.5%) with HM. All groups of myopia severity had a thinner average RNFL than the EM group, but after controlling for gender, age, and axial eye length, only the HM group differed significantly from the EM group (P=0.017). Likewise, the superior, inferior and nasal RNFL was thinner in all myopia groups compared to controls, but after controlling for confounders, only the inferior quadrant RNFL was significantly thinner in the HM group, when compared to the EM group (P=0.017).

    CONCLUSION: The average and inferior quadrant RNFL is thinner in highly myopic eyes compared to emmetropic eyes. Refractive status must be taken into consideration when interpreting the OCT of myopic patients, as RNFL thickness varies with the degree of myopia.

  11. Nagendrababu V, Sheriff Sultan O, Kannathasan S, Patel AS, Chitra E, Neelakantan P, et al.
    Restor Dent Endod, 2018 Feb;43(1):e1.
    PMID: 29487832 DOI: 10.5395/rde.2018.43.e1
    Objectives: To determine the effect of root canal irrigants on the hydrophobicity and adherence ofStaphylococcus epidermidis(S. epidermidis) to root canal dentinin vitro.

    Materials and Methods: Root dentin blocks (n= 60) were randomly divided into 4 groups based on the irrigation regimen: group 1, saline; group 2, 5.25% sodium hypochlorite (NaOCl); group 3, 5.25% NaOCl followed by 17% ethylenediaminetetraacetic acid (EDTA); group 4, same as group 3 followed by 2% chlorhexidine (CHX). The hydrophobicity ofS. epidermidisto root dentin was calculated by cell surface hydrophobicity while the adherence was observed by fluorescence microscopy, and bacteria were quantified using ImageJ software (National Institutes of Health). Statistical analysis of the data was done using Kruskal-Wallis test and Mann-WhitneyUtest (p= 0.05).

    Results: The hydrophobicity and adherence ofS. epidermidisto dentin were significantly increased after irrigating with group 3 (NaOCl-EDTA) (p< 0.05), whereas in group 4 (NaOCl-EDTA-CHX) both hydrophobicity and adherence were significantly reduced (p< 0.05).

    Conclusions: The adherence ofS. epidermidisto dentin was influenced differently by root canal irrigants. Final irrigation with CHX reduces the bacterial adherence and may impact biofilm formation.

  12. Khan F, Amatya B, de Groote W, Owolabi M, Syed IM, Hajjoui A, et al.
    J Rehabil Med, 2018 May 08;50(5):472-479.
    PMID: 29487941 DOI: 10.2340/16501977-2313
    OBJECTIVE: Despite the prevalence of disability in low-and middle-income countries, the clinical skills of the rehabilitation workforce are not well described. We report health professionals' perspectives on clinical skills in austere settings and identify context-specific gaps in workforce capacity.

    METHODS: A cross-sectional pilot survey (Pakistan, Morocco, Nigeria, Malaysia) of health professionals' working in rehabilitation in hospital and community settings. A situational-analysis survey captured assessment of clinical skills required in various rehabilitation settings. Responses were coded in a line-by-line process, and linked to categories in domains of the International Classification of Functioning, Disability and Health (ICF).

    RESULTS: Respondents (n = 532) from Pakistan 248, Nigeria 159, Morocco 93 and Malaysia 32 included the following: physiotherapists (52.8%), nurses (8.8%), speech (5.3%) and occupational therapists (8.5%), rehabilitation physicians (3.8%), other doctors (5.5%) and prosthetist/orthotists (1.5%). The 10 commonly used clinical skills reported were prescription of: physical activity, medications, transfer-techniques, daily-living activities, patient/carer education, diagnosis/screening, behaviour/cognitive interventions, comprehensive patient-care, referrals, assessments and collaboration. There was significant overlap in skills listed irrespective of profession. Most responses linked with ICF categories in activities/participation and personal factors.

    CONCLUSION: The core skills identified reflect general rehabilitation practice and a task-shifting approach, to address shortages of health workers in low-and middle-income countries.

    MeSH terms: Adult; Clinical Competence/standards*; Cross-Sectional Studies; Disability Evaluation*; Female; Disabled Persons/rehabilitation*; Humans; Male; Pilot Projects; Poverty; Capacity Building/methods*
  13. Tan BH, Ahemad N, Pan Y, Palanisamy UD, Othman I, Yiap BC, et al.
    Biopharm Drug Dispos, 2018 Apr;39(4):205-217.
    PMID: 29488228 DOI: 10.1002/bdd.2127
    Many dietary supplements are promoted to patients with osteoarthritis (OA) including the three naturally derived compounds, glucosamine, chondroitin and diacerein. Despite their wide spread use, research on interaction of these antiarthritic compounds with human hepatic cytochrome P450 (CYP) enzymes is limited. This study aimed to examine the modulatory effects of these compounds on CYP2C9, a major CYP isoform, using in vitro biochemical assay and in silico models. Utilizing valsartan hydroxylase assay as probe, all forms of glucosamine and chondroitin exhibited IC50 values beyond 1000 μM, indicating very weak potential in inhibiting CYP2C9. In silico docking postulated no interaction with CYP2C9 for chondroitin and weak bonding for glucosamine. On the other hand, diacerein exhibited mixed-type inhibition with IC50 value of 32.23 μM and Ki value of 30.80 μM, indicating moderately weak inhibition. Diacerein's main metabolite, rhein, demonstrated the same mode of inhibition as diacerein but stronger potency, with IC50 of 6.08 μM and Ki of 1.16 μM. The docking of both compounds acquired lower CDOCKER interaction energy values, with interactions dominated by hydrogen and hydrophobic bondings. The ranking with respect to inhibition potency for the investigated compounds was generally the same in both in vitro enzyme assay and in silico modeling with order of potency being diacerein/rhein > various glucosamine/chondroitin forms. In vitro-in vivo extrapolation of inhibition kinetics (using 1 + [I]/Ki ratio) demonstrated negligible potential of diacerein to cause interaction in vivo, whereas rhein was predicted to cause in vivo interaction, suggesting potential interaction risk with the CYP2C9 drug substrates.
    MeSH terms: Valsartan/pharmacology; Anthraquinones/pharmacology; Anti-Inflammatory Agents/pharmacology*; Arthritis/drug therapy; Chondroitin/pharmacology; Drug Interactions; Glucosamine/pharmacology; Sulfaphenazole/pharmacology; Molecular Docking Simulation; Cytochrome P-450 CYP2C9 Inhibitors/pharmacology*; Cytochrome P-450 CYP2C9/metabolism*; Cytochrome P-450 CYP2C9/chemistry
  14. Mohd Lazaldin MA, Iezhitsa I, Agarwal R, Bakar NS, Agarwal P, Mohd Ismail N
    Int J Neurosci, 2018 Oct;128(10):952-965.
    PMID: 29488424 DOI: 10.1080/00207454.2018.1446953
    PURPOSE: Amyloid beta (Aβ) is known to contribute to the pathophysiology of retinal neurodegenerative diseases such as glaucoma. Effects of intravitreal Aβ(1-42) on retinal and optic nerve morphology in animal models have widely been studied but not those of Aβ(1-40). Hence, we evaluated the time- and dose-related effects of intravitreal Aβ(1-40) on retinal and optic nerve morphology. Since oxidative stress and brain derived neurotrophic factor (BDNF) are associated with Aβ-induced neuronal damage, we also studied dose and time-related effects of Aβ(1-40) on retinal oxidative stress and BDNF levels.

    MATERIALS AND METHODS: Five groups of rats were intravitreally administered with vehicle or Aβ(1-40) in doses of 1.0, 2.5, 5 and 10 nmol. Animals were sacrificed and eyes were enucleated at weeks 1, 2 and 4 post-injection. The retinae were subjected to morphometric analysis and TUNEL staining. Optic nerve sections were stained with toluidine blue and were graded for neurodegenerative effects. The estimation of BDNF and markers of oxidative stress in retina were done using ELISA technique.

    RESULTS AND CONCLUSIONS: It was observed that intravitreal Aβ(1-40) causes significant retinal and optic nerve damage up to day 14 post-injection and there was increasing damage with increase in dose. However, on day 30 post-injection both the retinal and optic nerve morphology showed a trend towards normalization. The observations made for retinal cell apoptosis, retinal glutathione, superoxide dismutase activity and BDNF were in accordance with those of morphological changes with deterioration till day 14 and recovery by day 30 post-injection. The findings of this study may provide a guide for selection of appropriate experimental conditions for future studies.

    MeSH terms: Animals; Glaucoma; Glutathione; Optic Nerve; Peptide Fragments; Retina; Tolonium Chloride; Amyloid beta-Peptides; Apoptosis; Oxidative Stress; Brain-Derived Neurotrophic Factor; Neurodegenerative Diseases; Optic Nerve Injuries; In Situ Nick-End Labeling; Rats
  15. Ahadzadeh AS, Sharif SP
    Cancer Nurs, 2018 3 1;41(6):484-490.
    PMID: 29489477 DOI: 10.1097/NCC.0000000000000552
    BACKGROUND: The negative relationship between uncertainty and quality of life is well reported in the literature. Also, there is abundant research linking coping strategies to cancer patients' quality of life. However, there exists a paucity of information on the moderating effect of coping styles on the relationship between uncertainty and quality of life in cancer patients.

    OBJECTIVE: The aim of this study was to examine whether uncertainty in illness is negatively correlated with quality of life and whether this relationship is moderated by coping strategies, namely, problem-focused, avoidant, and active emotional coping.

    METHODS: A convenience sample of 135 Malaysian women with breast cancer participated in the study. Participants completed measures of uncertainty in illness, quality of life, and coping styles.

    RESULTS: Uncertainty in breast cancer was negatively related to quality of life (β = -0.379, P < .001), and active emotional coping was found to moderate this negative relationship (β = 0.155, P < .05). The model explained 22.20% of the variance of quality of life.

    CONCLUSION: Lack of information about breast cancer, treatment, hospitalization, and disease recurrence is related to poorer quality of life. However, this negative relationship becomes weaker when active emotional coping strategies are used.

    IMPLICATIONS FOR PRACTICE: Nurses and health providers should help patients reduce their uncertainty in illness by providing them information on breast cancer or referring them to relevant sources. Moreover, they could reduce the deleterious effect of uncertainty on quality of life by encouraging patients to use more active emotional coping strategies.

    MeSH terms: Adaptation, Psychological*; Adult; Aged; Aged, 80 and over; Breast Neoplasms/psychology*; Emotions*; Female; Humans; Middle Aged; Quality of Life/psychology*; Surveys and Questionnaires; Stress, Psychological/prevention & control*; Uncertainty*
  16. Ma NL, Che Lah WA, Abd Kadir N, Mustaqim M, Rahmat Z, Ahmad A, et al.
    PLoS One, 2018;13(2):e0192732.
    PMID: 29489838 DOI: 10.1371/journal.pone.0192732
    Salinity threat is estimated to reduce global rice production by 50%. Comprehensive analysis of the physiological and metabolite changes in rice plants from salinity stress (i.e. tolerant versus susceptible plants) is important to combat higher salinity conditions. In this study, we screened a total of 92 genotypes and selected the most salinity tolerant line (SS1-14) and most susceptible line (SS2-18) to conduct comparative physiological and metabolome inspections. We demonstrated that the tolerant line managed to maintain their water and chlorophyll content with lower incidence of sodium ion accumulation. We also examined the antioxidant activities of these lines: production of ascorbate peroxidase (APX) and catalase (CAT) were significantly higher in the sensitive line while superoxide dismutase (SOD) was higher in the tolerant line. Partial least squares discriminant analysis (PLS-DA) score plots show significantly different response for both lines after the exposure to salinity stress. In the tolerant line, there was an upregulation of non-polar metabolites and production of sucrose, GABA and acetic acid, suggesting an important role in salinity adaptation. In contrast, glutamine and putrescine were noticeably high in the susceptible rice. Coordination of different strategies in tolerant and susceptible lines show that they responded differently after exposure to salt stress. These findings can assist crop development in terms of developing tolerance mechanisms for rice crops.
    MeSH terms: Catalase/metabolism; Magnetic Resonance Spectroscopy; Oryza/enzymology; Oryza/genetics; Oryza/physiology*; Sodium Chloride*; Superoxide Dismutase/metabolism; Oxidative Stress*; Crops, Agricultural/enzymology; Crops, Agricultural/genetics; Crops, Agricultural/physiology*; Salinity*; Salt-Tolerance*; Metabolome; Ascorbate Peroxidases/metabolism
  17. Adil M, Lee K, Mohd Zaid H, Ahmad Latiff NR, Alnarabiji MS
    PLoS One, 2018;13(2):e0193518.
    PMID: 29489897 DOI: 10.1371/journal.pone.0193518
    Recently, nano-EOR has emerged as a new frontier for improved and enhanced oil recovery (IOR & EOR). Despite their benefits, the nanoparticles tend to agglomerate at reservoir conditions which cause their detachment from the oil/water interface, and are consequently retained rather than transported through a porous medium. Dielectric nanoparticles including ZnO have been proposed to be a good replacement for EOR due to their high melting point and thermal properties. But more importantly, these particles can be polarized under electromagnetic (EM) irradiation, which provides an innovative smart Nano-EOR process denoted as EM-Assisted Nano-EOR. In this study, parameters involved in the oil recovery mechanism under EM waves, such as reducing mobility ratio, lowering interfacial tensions (IFT) and altering wettability were investigated. Two-phase displacement experiments were performed in sandpacks under the water-wet condition at 95°C, with permeability in the range of 265-300 mD. A crude oil from Tapis oil field was employed; while ZnO nanofluids of two different particle sizes (55.7 and 117.1 nm) were prepared using 0.1 wt. % nanoparticles that dispersed into brine (3 wt. % NaCl) along with SDBS as a dispersant. In each flooding scheme, three injection sequential scenarios have been conducted: (i) brine flooding as a secondary process, (ii) surfactant/nano/EM-assisted nano flooding, and (iii) second brine flooding to flush nanoparticles. Compare with surfactant flooding (2% original oil in place/OOIP) as tertiary recovery, nano flooding almost reaches 8.5-10.2% of OOIP. On the other hand, EM-assisted nano flooding provides an incremental oil recovery of approximately 9-10.4% of OOIP. By evaluating the contact angle and interfacial tension, it was established that the degree of IFT reduction plays a governing role in the oil displacement mechanism via nano-EOR, compare to mobility ratio. These results reveal a promising way to employ water-based ZnO nanofluid for enhanced oil recovery purposes at a relatively high reservoir temperature.
    MeSH terms: Particle Size; Petroleum; Pulmonary Surfactants; Salts; Sodium Chloride; Surface Tension; Surface-Active Agents; Temperature; Water; Zinc Oxide; Porosity; Wettability; Nanoparticles; Oil and Gas Fields
  18. Ismail SR, Maarof SK, Siedar Ali S, Ali A
    PLoS One, 2018;13(2):e0193533.
    PMID: 29489910 DOI: 10.1371/journal.pone.0193533
    BACKGROUND: The high amount of saturated fatty acids (SFA) coupled with the rising availability and consumption of palm oil have lead to the assumption that palm oil contributes to the increased prevalence of cardiovascular diseases worldwide. We aimed at systematically synthesising the association of palm oil consumption with cardiovascular disease risk and cardiovascular disease-specific mortality.

    METHODS: We systematically searched Central, Medline and Embase databases up to June 2017 without restriction on setting or language. We performed separate searches based on the outcomes: coronary heart disease and stroke, using keywords related to these outcomes and palm oil. We searched for published interventional and observational studies in adults (Age: >18 years old). Two investigators extracted data and a consensus was reached with involvement of a third. Only narrative synthesis was performed for all of the studies, as the data could not be pooled.

    RESULTS: Our search retrieved 2,738 citations for stroke with one included study and 1,777 citations for coronary heart disease (CHD) with four included studies. Palmitic acid was reported to be associated with risk of myocardial infarction (MI) (OR 2.76; 95%CI = 1.39-5.47). Total SFA intake was reported to be not significant for risk of MI. Varying intake of fried foods, highest contributor to total SFA with 36% of households using palm oil for frying, showed no significant associations to risk of MI. Odds of developing first non-fatal acute MI was higher in palm oil compared to soybean oil with 5% trans-fat (OR = 1.33; 95%CI = 1.09-1.62) than palm oil compared to soybean oil with 22% trans-fat (OR = 1.16; 95%CI = 0.86-1.56). Nevertheless, these risk estimates were non-significant and imprecise. The trend amongst those taking staple pattern diet (characterised by higher palm oil, red meat and added sugar consumption) was inconsistent across the factor score quintiles. During the years of 1980 and 1997, for every additional kilogram of palm oil consumed per-capita annually, CHD mortality risk was 68 deaths per 100,000 (95% CI = 21-115) in developing countries and 17 deaths per 100,000 (95%CI = 5.3-29) in high-income countries, whereas stroke was associated with 19 deaths per 100,000 (95%CI = -12-49) and 5.1 deaths per 100,000 (95% CI: -1.2-11) respectively. The evidence for the outcomes of this review were all graded as very low. The findings of this review should be interpreted with some caution, owing to the lack of a pooled effect estimate of the association, significant bias in selection criteria and confounding factors, inclusion of other food items together with palm oil, and the possible out-dated trend in the ecological study.

    CONCLUSION: In view of the abundance of palm oil in the market, quantifying its true association with CVD outcomes is challenging. The present review could not establish strong evidence for or against palm oil consumption relating to cardiovascular disease risk and cardiovascular disease-specific mortality. Further studies are needed to establish the association of palm oil with CVD. A healthy overall diet should still be prioritised for good cardiometabolic health.

    MeSH terms: Cardiovascular Diseases/chemically induced; Cardiovascular Diseases/epidemiology*; Humans; Risk
  19. Lim WY, Morton RL, Turner RM, Jenkins MC, Guitera P, Irwig L, et al.
    JAMA Dermatol, 2018 04 01;154(4):420-427.
    PMID: 29490373 DOI: 10.1001/jamadermatol.2018.0021
    Importance: The standard model of follow-up posttreatment of localized melanoma relies on clinician detection of recurrent or new melanoma, through routinely scheduled clinics (clinician-led surveillance). An alternative model is to increase reliance on patient detection of melanoma, with fewer scheduled visits and increased support for patients' skin self-examination (SSE) (eg, using smartphone apps to instruct, prompt and record SSE, and facilitate teledermatology; patient-led surveillance).

    Objective: To determine the proportion of adults treated for localized melanoma who prefer the standard scheduled visit frequency (as per Australian guideline recommendations) or fewer scheduled visits (adapted from the Melanoma Follow-up [MELFO] study of reduced follow-up).

    Design, Setting, and Participants: This survey study used a telephone interview for surveillance following excision of localized melanoma at an Australian specialist center. We invited a random sample of 400 patients who had completed treatment for localized melanoma in 2014 to participate. They were asked about their preferences for scheduled follow-up, and experience of follow-up in the past 12 months. Those with a recurrent or new primary melanoma diagnosed by the time of interview (0.8-1.7 years since first diagnosis) were asked about how it was first detected and treated. SSE practices were also assessed.

    Main Outcomes and Measures: Proportion preferring standard vs fewer scheduled clinic visits, median delay between detection and treatment of recurrent or new primary melanoma, and SSE practices.

    Results: Of the 262 people who agreed to be interviewed, the mean (SD) age was 64.3 (14.3) years, and 93 (36%) were women. Among the 230 people who did not have a recurrent or new primary melanoma, 149 vs 81 preferred the standard vs fewer scheduled clinic visits option (70% vs 30% after adjusting for sampling frame). Factors independently associated with preferring fewer visits were a higher disease stage, melanoma on a limb, living with others, not having private health insurance, and seeing a specialist for another chronic condition. The median delay between first detection and treatment of recurrent or new primary melanoma was 7 and 3 weeks, respectively. Only 8% missed a scheduled visit, while 40% did not perform SSE or did so at greater than 3-month intervals.

    Conclusions and Relevance: Some patients with melanoma may prefer fewer scheduled visits, if they are supported to do SSE and there is rapid clinical review of anything causing concern (patient-led surveillance).

    MeSH terms: Smartphone; Aftercare/methods; Aged; Female; Humans; Male; Melanoma/diagnosis*; Melanoma/pathology; Melanoma/surgery; Middle Aged; Neoplasm Recurrence, Local/diagnosis*; Neoplasm Recurrence, Local/pathology; Neoplasm Staging; Office Visits*; Surveys and Questionnaires; Skin Neoplasms/diagnosis*; Skin Neoplasms/pathology; Skin Neoplasms/surgery; Time Factors; Self-Examination*; Neoplasms, Second Primary/diagnosis*; Neoplasms, Second Primary/pathology; Telemedicine; Patient Preference*; Mobile Applications
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