Browse publications by year: 2018

  1. Jaafaru MS, Abd Karim NA, Mohamed Eliaser E, Maitalata Waziri P, Ahmed H, Mustapha Barau M, et al.
    Nutrients, 2018 Aug 27;10(9).
    PMID: 30150582 DOI: 10.3390/nu10091174
    The incidence of prostate cancer malignancy along with other cancer types is increasing worldwide, resulting in high mortality rate due to lack of effective medications. Moringa oleifera has been used for the treatment of communicable and non-communicable ailments across tropical countries, yet, little has been documented regarding its effect on prostate cancer. We evaluated the acute toxicity and apoptosis inducing effect of glucomoringin-isothiocyanate rich soluble extracts (GMG-ITC-RSE) from M. oleifera in vivo and in vitro, respectively. Glucomoringin was isolated, identified, and characterized using fundamental analytical chemistry tools where Sprague-Dawley (SD) rats, murine fibroblast (3T3), and human prostate adenocarcinoma cells (PC-3) were used for acute toxicity and bioassays experiments. GMG-ITC-RSE did not instigate adverse toxic reactions to the animals even at high doses (2000 mg/kg body weight) and affected none of the vital organs in the rats. The extract exhibited high levels of safety in 3T3 cells, where more than 90% of the cells appeared viable when treated with the extract in a time-dependent manner even at high dose (250 µg/mL). GMG-ITC-RSE significantly triggered morphological aberrations distinctive to apoptosis observed under microscope. These findings obviously revealed the putative safety of GMG-ITC-RSE in vivo and in vitro, in addition to its anti-proliferative effect on PC-3 cells.
    MeSH terms: Adenocarcinoma/drug therapy*; Adenocarcinoma/pathology; Animals; Antineoplastic Agents, Phytogenic/analysis; Antineoplastic Agents, Phytogenic/pharmacology*; Antineoplastic Agents, Phytogenic/toxicity; Female; Humans; Male; Prostatic Neoplasms/drug therapy*; Prostatic Neoplasms/pathology; Rhamnose/analogs & derivatives*; Rhamnose/analysis; Rhamnose/pharmacology; Rhamnose/toxicity; 3T3 Cells; Rats, Sprague-Dawley; Apoptosis/drug effects*; Isothiocyanates/analysis; Isothiocyanates/pharmacology*; Isothiocyanates/toxicity; Risk Assessment; Cell Proliferation/drug effects*; Mice
  2. Karim R, Tan YS, Singh P, Khalid N, Harikrishna JA
    Physiol Mol Biol Plants, 2018 Sep;24(5):741-751.
    PMID: 30150851 DOI: 10.1007/s12298-018-0566-8
    The process of somatic embryogenesis and plant regeneration involve changes in gene expression and have been associated with changes in DNA methylation. Here, we report the expression and DNA methylation patterns of SOMATIC EMBRYOGENESIS RECEPTOR-LIKE KINASE (SERK), BABY BOOM (BBM), LEAFY COTYLEDON 2 (LEC2) and WUSCHEL (WUS) in meristematic block of newly emerged shoots from rhizome, embryogenic and non-embryogenic calli, prolonged cell suspension culture, ex vitro leaf, and in vitro leaf of regenerated plants of Boesenbergia rotunda. Among all seven samples, based on qRT-PCR, the highest level of expression of SERK, BBM and LEC2 was in embryogenic callus, while WUS was most highly expressed in meristematic block tissue followed by embryogenic callus. Relatively lower expression was observed in cell suspension culture and watery callus for SERK, LEC2 and WUS and in in vitro leaf for BBM. For gene specific methylation determined by bisulfite sequencing data, embryogenic callus samples had the lowest levels of DNA methylation at CG, CHG and CHH contexts of SERK, LEC2 and WUS. We observed negative correlation between DNA methylation at the CG and CHG contexts and the expression levels of SERK, BBM, LEC2 and WUS. Based on our results, we suggest that relatively higher expression and lower level of DNA methylation of SERK, BBM, LEC2 and WUS are associated with somatic embryogenesis and plant regeneration in B. rotunda.
    MeSH terms: Callosities; Population Growth; Regeneration; Gene Expression; Polymerase Chain Reaction; Meristem; Cotyledon; DNA Methylation; Rhizome; Zingiberaceae; Embryonic Development
  3. Ulaganathan V, Kandiah M, Mohd Shariff Z
    J Gastrointest Oncol, 2018 Aug;9(4):650-663.
    PMID: 30151261 DOI: 10.21037/jgo.2018.04.01
    Background: Metabolic syndrome was linked with various chronic diseases, including cancer. The study on the effect of metabolic syndrome on colorectal cancer (CRC) was not conducted in Malaysia. Therefore, this study aims to determine the association between metabolic syndromes and its components with CRC, based on the three established definitions.

    Methods: A multi-centred matched case control study was conducted in five local hospitals. A total of 140 histologically confirmed CRC cases were matched with 280 cancer free controls. Mean value and prevalence of the components of metabolic syndrome between cases and controls were measured based on the three definitions. A multiple variable analysis using Cox regression was conducted to measure the strength of the association between the definitions of MetS, components of MetS and risk of CRC.

    Results: Multiple variable analyses showed that metabolic syndrome significantly and independently increased the risk of CRC, with an odds ratio ranging from 1.79 to 2.61. This study identified that the definition of metabolic syndrome by the International Diabetes Federation is the most sensitive in predicting the risk of CRC, compared to metabolic syndrome as defined by the World Health Organization and National Cholesterol Education Program Adults Treatment Panel III. Abdominal obesity, low HDL-cholesterol, and hypertension were identified as the three core risk factors, which promote inflammatory signals that contribute to metabolic syndrome and an increased risk of CRC.

    Conclusions: These data hypothesized that simple measurement of abdominal obesity, abnormal BP and HDL-cholesterol especially using International Diabetes Federation (IDF) definition of MetS for South Asians for to detect individuals at CRC risk may have higher clinical utility than applying other universal complex MetS definitions.

    MeSH terms: Adult; Chronic Disease; Diabetes Mellitus; Humans; Hypertension; Cholesterol, HDL; Malaysia; Risk Factors; Colorectal Neoplasms; Prevalence; Odds Ratio; Case-Control Studies; Obesity, Abdominal
  4. Ernieenor FCL, Ernna G, Jafson AS, Mariana A
    Exp Appl Acarol, 2018 Sep;76(1):99-107.
    PMID: 30151715 DOI: 10.1007/s10493-018-0285-4
    The occurrence of Suidasia medanensis (= S. pontifica) mites in Malaysian house dust was first reported in 1984. The taxonomy of this storage mite is, however, quite confusing. Therefore, we need an accurate identification to resolve morphological problems due to its minute size and some overlapping characters between species. The purpose of this study was to demonstrate the application of partial mitochondrial cytochrome c oxidase subunit I (COI) sequences for the identification of S. medanensis by PCR. Identity of the mite was first determined by observing morphological characters under a light microscope. Genomic DNA of S. medanensis mites was successfully extracted prior to PCR and DNA sequencing using COI universal primers. The length of the COI sequences obtained was 378 bp. BLAST analysis of amplicon sequences showed that local S. medanensis COI region had 99% maximum identity with S. medanensis nucleotide sequence (AY525568) available in the GenBank. As the phylogenetic tree generated indicated, COI sequences from this study were clustered with S. medanensis from Korea and the UK in one major clade, supported with high bootstrap value (> 85%). Results of the phylogenetic analysis of this COI gene were congruent with the morphological identification and provided strong support for a single clade of local S. medanensis.
    MeSH terms: Animals; Base Sequence; Electron Transport Complex IV/analysis; Dust; Malaysia; Mites/anatomy & histology; Mites/classification*; Mites/genetics; Phylogeny; Polymerase Chain Reaction/methods; Polymerase Chain Reaction/veterinary; Sequence Alignment; Arthropod Proteins/analysis
  5. Kopansky-Giles D, Johnson CD, Haldeman S, Chou R, Côté P, Green BN, et al.
    Eur Spine J, 2018 09;27(Suppl 6):915-924.
    PMID: 30151804 DOI: 10.1007/s00586-018-5725-7
    PURPOSE: The purpose of this report is to describe the development of a list of resources necessary to implement a model of care for the management of spine-related concerns anywhere in the world, but especially in underserved communities and low- and middle-income countries.

    METHODS: Contents from the Global Spine Care Initiative (GSCI) Classification System and GSCI care pathway papers provided a foundation for the resources list. A seed document was developed that included resources for spine care that could be delivered in primary, secondary and tertiary settings, as well as resources needed for self-care and community-based settings for a wide variety of spine concerns (e.g., back and neck pain, deformity, spine injury, neurological conditions, pathology and spinal diseases). An iterative expert consensus process was used using electronic surveys.

    RESULTS: Thirty-five experts completed the process. An iterative consensus process was used through an electronic survey. A consensus was reached after two rounds. The checklist of resources included the following categories: healthcare provider knowledge and skills, materials and equipment, human resources, facilities and infrastructure. The list identifies resources needed to implement a spine care program in any community, which are based upon spine care needs.

    CONCLUSION: To our knowledge, this is the first international and interprofessional attempt to develop a list of resources needed to deliver care in an evidence-based care pathway for the management of people presenting with spine-related concerns. This resource list needs to be field tested in a variety of communities with different resource capacities to verify its utility. These slides can be retrieved under Electronic Supplementary Material.

    MeSH terms: Delivery of Health Care/organization & administration*; Delphi Technique; Humans; Self Care; Spinal Diseases/classification; Spinal Diseases/therapy*
  6. Johnson CD, Haldeman S, Chou R, Nordin M, Green BN, Côté P, et al.
    Eur Spine J, 2018 09;27(Suppl 6):925-945.
    PMID: 30151805 DOI: 10.1007/s00586-018-5720-z
    PURPOSE: Spine-related disorders are a leading cause of global disability and are a burden on society and to public health. Currently, there is no comprehensive, evidence-based model of care for spine-related disorders, which includes back and neck pain, deformity, spine injury, neurological conditions, spinal diseases, and pathology, that could be applied in global health care settings. The purposes of this paper are to propose: (1) principles to transform the delivery of spine care; (2) an evidence-based model that could be applied globally; and (3) implementation suggestions.

    METHODS: The Global Spine Care Initiative (GSCI) meetings and literature reviews were synthesized into a seed document and distributed to spine care experts. After three rounds of a modified Delphi process, all participants reached consensus on the final model of care and implementation steps.

    RESULTS: Sixty-six experts representing 24 countries participated. The GSCI model of care has eight core principles: person-centered, people-centered, biopsychosocial, proactive, evidence-based, integrative, collaborative, and self-sustaining. The model of care includes a classification system and care pathway, levels of care, and a focus on the patient's journey. The six steps for implementation are initiation and preparation; assessment of the current situation; planning and designing solutions; implementation; assessment and evaluation of program; and sustain program and scale up.

    CONCLUSION: The GSCI proposes an evidence-based, practical, sustainable, and scalable model of care representing eight core principles with a six-step implementation plan. The aim of this model is to help transform spine care globally, especially in low- and middle-income countries and underserved communities. These slides can be retrieved under Electronic Supplementary Material.

    MeSH terms: Delivery of Health Care/organization & administration*; Delphi Technique; Humans; Spinal Diseases/epidemiology; Spinal Diseases/therapy*; Global Burden of Disease
  7. Johnson CD, Haldeman S, Nordin M, Chou R, Côté P, Hurwitz EL, et al.
    Eur Spine J, 2018 09;27(Suppl 6):786-795.
    PMID: 30151808 DOI: 10.1007/s00586-018-5723-9
    PURPOSE: The purpose of this report is to describe the Global Spine Care Initiative (GSCI) contributors, disclosures, and methods for reporting transparency on the development of the recommendations.

    METHODS: World Spine Care convened the GSCI to develop an evidence-based, practical, and sustainable healthcare model for spinal care. The initiative aims to improve the management, prevention, and public health for spine-related disorders worldwide; thus, global representation was essential. A series of meetings established the initiative's mission and goals. Electronic surveys collected contributorship and demographic information, and experiences with spinal conditions to better understand perceptions and potential biases that were contributing to the model of care.

    RESULTS: Sixty-eight clinicians and scientists participated in the deliberations and are authors of one or more of the GSCI articles. Of these experts, 57 reported providing spine care in 34 countries, (i.e., low-, middle-, and high-income countries, as well as underserved communities in high-income countries.) The majority reported personally experiencing or having a close family member with one or more spinal concerns including: spine-related trauma or injury, spinal problems that required emergency or surgical intervention, spinal pain referred from non-spine sources, spinal deformity, spinal pathology or disease, neurological problems, and/or mild, moderate, or severe back or neck pain. There were no substantial reported conflicts of interest.

    CONCLUSION: The GSCI participants have broad professional experience and wide international distribution with no discipline dominating the deliberations. The GSCI believes this set of papers has the potential to inform and improve spine care globally. These slides can be retrieved under Electronic Supplementary Material.

    MeSH terms: Delphi Technique; Humans; Research Design; Spinal Diseases/epidemiology*; Global Health*; Evidence-Based Medicine; Disclosure; Global Burden of Disease*
  8. Haldeman S, Nordin M, Chou R, Côté P, Hurwitz EL, Johnson CD, et al.
    Eur Spine J, 2018 09;27(Suppl 6):776-785.
    PMID: 30151809 DOI: 10.1007/s00586-018-5722-x
    PURPOSE: Spinal disorders, including back and neck pain, are major causes of disability, economic hardship, and morbidity, especially in underserved communities and low- and middle-income countries. Currently, there is no model of care to address this issue. This paper provides an overview of the papers from the Global Spine Care Initiative (GSCI), which was convened to develop an evidence-based, practical, and sustainable, spinal healthcare model for communities around the world with various levels of resources.

    METHODS: Leading spine clinicians and scientists around the world were invited to participate. The interprofessional, international team consisted of 68 members from 24 countries, representing most disciplines that study or care for patients with spinal symptoms, including family physicians, spine surgeons, rheumatologists, chiropractors, physical therapists, epidemiologists, research methodologists, and other stakeholders.

    RESULTS: Literature reviews on the burden of spinal disorders and six categories of evidence-based interventions for spinal disorders (assessment, public health, psychosocial, noninvasive, invasive, and the management of osteoporosis) were completed. In addition, participants developed a stratification system for surgical intervention, a classification system for spinal disorders, an evidence-based care pathway, and lists of resources and recommendations to implement the GSCI model of care.

    CONCLUSION: The GSCI proposes an evidence-based model that is consistent with recent calls for action to reduce the global burden of spinal disorders. The model requires testing to determine feasibility. If it proves to be implementable, this model holds great promise to reduce the tremendous global burden of spinal disorders. These slides can be retrieved under Electronic Supplementary Material.

    MeSH terms: Back Pain; Delphi Technique; Developing Countries; Humans; Spinal Diseases/epidemiology*; Global Health*; Critical Pathways; Evidence-Based Medicine; Global Burden of Disease*
  9. Haldeman S, Johnson CD, Chou R, Nordin M, Côté P, Hurwitz EL, et al.
    Eur Spine J, 2018 09;27(Suppl 6):901-914.
    PMID: 30151811 DOI: 10.1007/s00586-018-5721-y
    PURPOSE: The purpose of this report is to describe the development of an evidence-based care pathway that can be implemented globally.

    METHODS: The Global Spine Care Initiative (GSCI) care pathway development team extracted interventions recommended for the management of spinal disorders from six GSCI articles that synthesized the available evidence from guidelines and relevant literature. Sixty-eight international and interprofessional clinicians and scientists with expertise in spine-related conditions were invited to participate. An iterative consensus process was used.

    RESULTS: After three rounds of review, 46 experts from 16 countries reached consensus for the care pathway that includes five decision steps: awareness, initial triage, provider assessment, interventions (e.g., non-invasive treatment; invasive treatment; psychological and social intervention; prevention and public health; specialty care and interprofessional management), and outcomes. The care pathway can be used to guide the management of patients with any spine-related concern (e.g., back and neck pain, deformity, spinal injury, neurological conditions, pathology, spinal diseases). The pathway is simple and can be incorporated into educational tools, decision-making trees, and electronic medical records.

    CONCLUSION: A care pathway for the management of individuals presenting with spine-related concerns includes evidence-based recommendations to guide health care providers in the management of common spinal disorders. The proposed pathway is person-centered and evidence-based. The acceptability and utility of this care pathway will need to be evaluated in various communities, especially in low- and middle-income countries, with different cultural background and resources. These slides can be retrieved under Electronic Supplementary Material.

    MeSH terms: Delphi Technique; Humans; Spinal Diseases/therapy*; Triage; Critical Pathways*
  10. Bittleston LS, Wolock CJ, Yahya BE, Chan XY, Chan KG, Pierce NE, et al.
    Elife, 2018 08 28;7.
    PMID: 30152327 DOI: 10.7554/eLife.36741
    The 'pitchers' of carnivorous pitcher plants are exquisite examples of convergent evolution. An open question is whether the living communities housed in pitchers also converge in structure or function. Using samples from more than 330 field-collected pitchers of eight species of Southeast Asian Nepenthes and six species of North American Sarracenia, we demonstrate that the pitcher microcosms, or miniature ecosystems with complex communities, are strikingly similar. Compared to communities from surrounding habitats, pitcher communities house fewer species. While communities associated with the two genera contain different microbial organisms and arthropods, the species are predominantly from the same phylogenetic clades. Microbiomes from both genera are enriched in degradation pathways and have high abundances of key degradation enzymes. Moreover, in a manipulative field experiment, Nepenthes pitchers placed in a North American bog assembled Sarracenia-like communities. An understanding of the convergent interactions in pitcher microcosms facilitates identification of selective pressures shaping the communities.
    MeSH terms: Asia, Southeastern; Chitinase/metabolism; Geography; Nitrogen/metabolism; North America; Phylogeny; Species Specificity; Genes, Plant; Ecosystem*; DNA, Plant/genetics; Biodiversity; Sarraceniaceae/genetics; Sarraceniaceae/physiology*; Microbiota
  11. Mohamed Koya SNMV, Zulkepli NA
    Saudi J Kidney Dis Transpl, 2018 8 29;29(4):828-836.
    PMID: 30152419 DOI: 10.4103/1319-2442.239656
    Studies among hemodialysis (HD) patients have looked into relationships between illness perception (IP), depression, and adherence yet rarely looked further into medication factors. Those studies were also conducted at urban HD centers leaving out those from a smaller town. Our objective is to determine phosphate binders (PBs) influences on IP and depression among HD population in smaller town. One hundred and thirteen patients from three Central Pahang Cluster Hospitals, Malaysia on HD were interviewed using Malay version of the Brief IP Questionnaire and Beck Depression Inventory II (BDI-II). This study found a significant positive correlation between PBs daily dose frequency with consequence, timeline, and illness concern. Type of PBs used influenced personal control significantly. History of PBs side effects resulted in significantly lower treatment control and lower emotional representation. There was a significant negative relationship between dialysis vintage with both identity and IP score. Depressed patients had significantly higher emotional representation compared to healthy controls. Meanwhile, there was a positive correlation between BDI-II score with coherence, consequence, and emotional representation. Around 23.9% of the patients reported symptoms of depression. Depressed patients had significantly shorter dialysis vintage compared to healthy controls. They tended to report a significant history of hospital admission in the past six months that peaked among those on HD between four to six years. The current study showed the effect of PBs therapy on IP while depression was associated with HD duration and hospital admission. This information can be used to formulate a better treatment approach by health-care practitioners toward better patients treatment hence outcomes.
    MeSH terms: Adult; Aged; Cross-Sectional Studies; Female; Humans; Malaysia; Male; Middle Aged; Phosphates/metabolism; Surveys and Questionnaires
  12. Singh D, Narayanan S, Müller CP, Swogger MT, Rahim AA, Leong Bin Abdullah MFI, et al.
    J Psychoactive Drugs, 2018 08 28;50(5):445-450.
    PMID: 30152738 DOI: 10.1080/02791072.2018.1511879
    Kratom leaves (Mitragyna speciosa Korth.) are traditionally used in Southeast Asia for their medicinal value. Self-report studies suggest that cessation from chronic kratom tea consumption (freshly brewed kratom tea) was associated with unpleasant psychological symptoms. This study sought to assess the severity of anxiety and depression during kratom cessation. Regular kratom users (N = 150) were recruited from the northern state of Penang (Malaysia) for this retrospective study. The Beck Depression Inventory (BDI) and Beck Anxiety Inventory (BAI) scales were used to assess the severity of the symptoms of anxiety and depression. Most respondents (70%) experienced symptoms of mild anxiety, while 81% experienced symptoms of mild depression during kratom cessation. Those who consumed higher quantities of kratom tea daily (≥4 glasses) had higher odds of reporting longer duration of kratom use history (OR = 4.8, 95% CI 2.3 -10.1, p 
    MeSH terms: Teas, Herbal; Adolescent; Adult; Anxiety/etiology; Anxiety/epidemiology; Depression/etiology; Depression/epidemiology; Humans; Malaysia; Male; Middle Aged; Plant Extracts/administration & dosage*; Plant Extracts/adverse effects; Psychiatric Status Rating Scales; Retrospective Studies; Severity of Illness Index; Substance Withdrawal Syndrome/psychology*; Time Factors; Plant Leaves; Substance-Related Disorders/complications*; Mitragyna/chemistry*; Young Adult
  13. Wong LP, Alias H, Aghamohammadi N, Aghazadeh S, Nik Sulaiman NM
    Biomed Environ Sci, 2018 Jul;31(7):545-550.
    PMID: 30145991 DOI: 10.3967/bes2018.074
    MeSH terms: Cities*; Hot Temperature*; Humans; Public Health; Social Behavior*; Urban Population; Climate Change*
  14. Cheah YK, Azahadi M, Phang SN, Abd Manaf NH
    East Asian Arch Psychiatry, 2018 Sep;28(3):85-94.
    PMID: 30146496
    OBJECTIVE: To determine the association of suicidal ideation with demographic, lifestyle, and health factors, using data from National Health and Morbidity Survey 2011 (NHMS 2011) of Malaysia.
    METHODS: The NHMS 2011 included 10,141 respondents. Independent variables of suicidal ideation were income, age, household size, sex, ethnicity, education, marital status, smoking, physical activity, and self-rated health. The risk factors of suicidal ideation were determined using logistic regression analysis.
    RESULTS: In the pooled sample, suicidal ideation was associated with age, sex, ethnicity, and self-rated health, but not associated with income, household size, education, physical activity, or smoking.
    CONCLUSION: The likelihood of having suicidal ideation is positively associated with young adults, women, Indians, and those with poor self-rated health.
    Study name: National Health and Morbidity Survey (NHMS-2011)
    MeSH terms: Adult; Cross-Sectional Studies; Female; Health Status*; Humans; Life Style*; Malaysia; Male; Risk Factors; Socioeconomic Factors*; Young Adult; Suicidal Ideation*
  15. Raza Kazmi SM, Iqbal Z, Muneer MU, Riaz S, Zafar MS
    Eur J Dent, 2018 8 28;12(3):375-379.
    PMID: 30147402 DOI: 10.4103/ejd.ejd_232_18
    Objective: The current study aimed to assess the knowledge and practice of pontic design selection by the general dental practitioners (GDPs) in the light of contemporary guidelines.

    Materials and Methods: This cross-sectional study was conducted among the GDPs of Karachi. A questionnaire was designed to collect data from 100 GDPs. The questionnaire included general/demographic information (practitioner's education, experience, and place of practice) and an average number of fixed prosthesis constructed by the GDP. The questionnaire was further categorized to evaluate the knowledge/practice of pontic design selection and latest recommendations.

    Results: For the maxillary anterior segment, the ridge lap pontic was the most common (32%) followed by the modified ridge lap (28%). In the maxillary posterior segment, the ridge lap pontic was the most common (37%) followed by sanitary design (34%). For the mandibular anterior segment, the modified ridge lap (50%) was the most common followed by ridge lap pontic (17%). In case of the mandibular posterior segment, the sanitary design (34%) was the most common followed by ridge lap pontic (30%).

    Conclusions: The pontic design selection for the fixed prosthesis is a neglected domain. The contemporary guidelines are not followed with full spirit by the GDPs leading to wide variations in the pontic design selection.

    MeSH terms: Cross-Sectional Studies; Demography; Denture, Partial, Fixed; Guanosine Diphosphate; Mandible; Maxilla; Surveys and Questionnaires
  16. Deng PU, Halim MS, Masudi SM, Al-Shehadat S, Ahmad B
    Eur J Dent, 2018 8 28;12(3):410-416.
    PMID: 30147408 DOI: 10.4103/ejd.ejd_82_18
    Objective: The aim of this study is to investigate the variations in the number of root and canal in the mandibular first permanent molars (MFPMs) teeth in East Coast Malaysian population using cone-beam computed tomography (CBCT).

    Materials and Methods: CBCT images which show MFPMs recorded in HUSM Dental Clinic between January 2015 and June 2016 was obtained and analyzed for their number of roots and canals. A total of 208 CBCT images of MFPMs were collected; 118 patients had unilateral molars and 90 patients had bilateral molars. The following observations were made: (1) root number; (2) number of canals per root; and (3) comparisons of number of roots and canals according to gender, ethnicity, and position.

    Results: The majority of cases of bilateral MFPM had the same number of roots (95.6%, 95% confidence interval [CI]: 89.01%, 98.78%) on both the right and left side and only 4 cases (4.4%, 95% CI: 1.22%, 10.99%) had 3 roots on the right and 2 roots on the left sides. The majority of cases had the same number of canals on both sides (66.7%, 95% CI: 55.95, 76.26%) and 33.3% (95% CI: 23.74%, 44.05%) with unequal number of canals. The occurrence of the number of canals was not independent of the sides of the arch (P < 0.001) and there was statistically significantly greater proportion of cases who had greater number of canals on the right side than the left (P = 0.03). The prevalence of right single-rooted MFPM was very small at 0.3% (n = 1) in a Malay male (95% CI: 0.00, 1.83) and the most prevalent was two roots first molar (88.4%). The number of roots was not associated with sex or ethnic group (P > 0.05). The MFPM with a single root was found to have only one mesial canal. For two rooted MFPM, the most prevalent occurrence was two canals at the mesial and one canal at the distal roots (59%); followed by single canals in each mesial and distal (21%) and double canals per root (18%). Three roots MFPM have either single or double canals in the mesial root and double canals in the distal root.

    Conclusions: The majority of population in the East Coast region of Malaysia has two roots and three root canals in their MFPMs. There was no difference in the number of roots between gender and ethnic and canals between ethnic.

    MeSH terms: Dental Clinics; Dental Pulp Cavity; Ethnic Groups; Humans; Malaysia; Male; Mandible; Molar; Tooth Root; Prevalence; Confidence Intervals; Cone-Beam Computed Tomography
  17. Dzulkifli MA, Hamzaid NA, Davis GM, Hasnan N
    Front Neurorobot, 2018;12:50.
    PMID: 30147650 DOI: 10.3389/fnbot.2018.00050
    This study sought to design and deploy a torque monitoring system using an artificial neural network (ANN) with mechanomyography (MMG) for situations where muscle torque cannot be independently quantified. The MMG signals from the quadriceps were used to derive knee torque during prolonged functional electrical stimulation (FES)-assisted isometric knee extensions and during standing in spinal cord injured (SCI) individuals. Three individuals with motor-complete SCI performed FES-evoked isometric quadriceps contractions on a Biodex dynamometer at 30° knee angle and at a fixed stimulation current, until the torque had declined to a minimum required for ANN model development. Two ANN models were developed based on different inputs; Root mean square (RMS) MMG and RMS-Zero crossing (ZC) which were derived from MMG. The performance of the ANN was evaluated by comparing model predicted torque against the actual torque derived from the dynamometer. MMG data from 5 other individuals with SCI who performed FES-evoked standing to fatigue-failure were used to validate the RMS and RMS-ZC ANN models. RMS and RMS-ZC of the MMG obtained from the FES standing experiments were then provided as inputs to the developed ANN models to calculate the predicted torque during the FES-evoked standing. The average correlation between the knee extension-predicted torque and the actual torque outputs were 0.87 ± 0.11 for RMS and 0.84 ± 0.13 for RMS-ZC. The average accuracy was 79 ± 14% for RMS and 86 ± 11% for RMS-ZC. The two models revealed significant trends in torque decrease, both suggesting a critical point around 50% torque drop where there were significant changes observed in RMS and RMS-ZC patterns. Based on these findings, both RMS and RMS-ZC ANN models performed similarly well in predicting FES-evoked knee extension torques in this population. However, interference was observed in the RMS-ZC values at a time around knee buckling. The developed ANN models could be used to estimate muscle torque in real-time, thereby providing safer automated FES control of standing in persons with motor-complete SCI.
  18. Paul A, Tang TH, Ng SK
    Front Immunol, 2018;9:1831.
    PMID: 30147694 DOI: 10.3389/fimmu.2018.01831
    Interferon regulatory factor 9 (IRF9) is an integral transcription factor in mediating the type I interferon antiviral response, as part of the interferon-stimulated gene factor 3. However, the role of IRF9 in many important non-communicable diseases has just begun to emerge. The duality of IRF9's role in conferring protection but at the same time exacerbates diseases is certainly puzzling. The regulation of IRF9 during these conditions is not well understood. The high homology of IRF9 DNA-binding domain to other IRFs, as well as the recently resolved IRF9 IRF-associated domain structure can provide the necessary insights for progressive inroads on understanding the regulatory mechanism of IRF9. This review sought to outline the structural basis of IRF9 that guides its regulation and interaction in antiviral immunity and other diseases.
    MeSH terms: Animals; Antiviral Agents/metabolism*; Gene Expression Regulation*; Humans; Immunity; Protein Binding; Structure-Activity Relationship; Virus Diseases/immunology*; Signal Transduction; Protein Structure, Tertiary; Interferon-Stimulated Gene Factor 3, gamma Subunit/genetics; Interferon-Stimulated Gene Factor 3, gamma Subunit/metabolism*; Interferon Regulatory Factor-3/genetics; Interferon Regulatory Factor-3/metabolism*
  19. Subhi H, Reza F, Husein A, Al Shehadat SA, Nurul AA
    Int J Biomater, 2018;2018:3804293.
    PMID: 30147725 DOI: 10.1155/2018/3804293
    Effective pulp capping material must be biocompatible and have the ability to induce dentin bridge formation as well as having suitable physical and mechanical properties; however, many current materials do not satisfy the clinical requirements. This study aimed to assess the physical and mechanical properties of gypsum-based chitosan material (Gp-CT) and to evaluate its effects on cellular properties of stem cells from human exfoliated deciduous teeth (SHED). The experimental material was prepared with different concentrations of chitosan (CT) with or without BMP-2. Then, setting time, compressive strength, and pH were determined. In addition, cell viability, alkaline phosphatase (ALP) activity, and cell attachment were assessed. The setting time, compressive strength, and pH obtained were 4.1-6.6 min, 2.63-5.83 MPa, and 6.5-5.7, respectively. The cell viability to gypsum (Gp) with different CT concentrations was similar to that of the control on day 1 but statistically different from that of Gp alone on day 3. The ALP activity of SHED was significantly higher (p < 0.05) in CT- and BMP-2-containing materials than those in the control and Dycal at days 3 and 14. The scanning electron microscopy (SEM) image revealed that flattened cells were distributed across and adhered to the material surface. In conclusion, Gp-CT material shows promise as a potential material for direct pulp capping.
    MeSH terms: Alkaline Phosphatase; Calcium Hydroxide; Calcium Sulfate; Cell Survival; Dental Pulp Capping; Dentin; Humans; Microscopy, Electron, Scanning; Minerals; Stem Cells; Tooth, Deciduous; Compressive Strength; Chitosan; Bone Morphogenetic Protein 2
  20. Henriksson PJG, Rico A, Troell M, Klinger DH, Buschmann AH, Saksida S, et al.
    Sustain Sci, 2018;13(4):1105-1120.
    PMID: 30147798 DOI: 10.1007/s11625-017-0511-8
    Global seafood provides almost 20% of all animal protein in diets, and aquaculture is, despite weakening trends, the fastest growing food sector worldwide. Recent increases in production have largely been achieved through intensification of existing farming systems, resulting in higher risks of disease outbreaks. This has led to increased use of antimicrobials (AMs) and consequent antimicrobial resistance (AMR) in many farming sectors, which may compromise the treatment of bacterial infections in the aquaculture species itself and increase the risks of AMR in humans through zoonotic diseases or through the transfer of AMR genes to human bacteria. Multiple stakeholders have, as a result, criticized the aquaculture industry, resulting in consequent regulations in some countries. AM use in aquaculture differs from that in livestock farming due to aquaculture's greater diversity of species and farming systems, alternative means of AM application, and less consolidated farming practices in many regions. This, together with less research on AM use in aquaculture in general, suggests that large data gaps persist with regards to its overall use, breakdowns by species and system, and how AMs become distributed in, and impact on, the overall social-ecological systems in which they are embedded. This paper identifies the main factors (and challenges) behind application rates, which enables discussion of mitigation pathways. From a set of identified key mechanisms for AM usage, six proximate factors are identified: vulnerability to bacterial disease, AM access, disease diagnostic capacity, AMR, target markets and food safety regulations, and certification. Building upon these can enable local governments to reduce AM use through farmer training, spatial planning, assistance with disease identification, and stricter regulations. National governments and international organizations could, in turn, assist with disease-free juveniles and vaccines, enforce rigid monitoring of the quantity and quality of AMs used by farmers and the AM residues in the farmed species and in the environment, and promote measures to reduce potential human health risks associated with AMR.
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