Browse publications by year: 2018

  1. Pang SC, Voon LK, Chin SF
    Appl Biochem Biotechnol, 2018 Apr;184(4):1142-1154.
    PMID: 28965305 DOI: 10.1007/s12010-017-2616-z
    The conversion of starchy sago (Metroxylon sagu) pith waste (SPW), a lignocellulosic biomass waste, to fermentable sugars under mild conditions had been successfully demonstrated. The optimum depolymerization of SPW was achieved at 2 wt% sample loading which was catalyzed by 100 mM of oxalic acid in the presence of 25 wt% NaCl solution at 110 °C for 3 h. Up to 97% SPW sample was being converted into fermentable sugars with limited formation of by-products after two sequential depolymerization cycles. Both reaction temperature and concentration of oxalic acid were crucial parameters for the depolymerization of SPW which exhibited a high selectivity for the production of glucose over other reducing sugars.
    MeSH terms: Lignin/chemistry*; Biomass*; Oxalic Acid/chemistry*; Arecaceae/chemistry*; Solid Waste*
  2. Tan PY, Tan TB, Chang HW, Tey BT, Chan ES, Lai OM, et al.
    Food Chem, 2018 Feb 15;241:79-85.
    PMID: 28958562 DOI: 10.1016/j.foodchem.2017.08.075
    Tocotrienol microcapsules (TM) were formed by firstly preparing Pickering emulsion containing tocotrienols, which was then gelled into microcapsules using alginate and chitosan. In this study, we examined the stability of TM during storage and when applied into a model food system, i.e. yogurt. During storage at 40°C, TM displayed remarkably lower tocotrienols loss (50.8%) as compared to non-encapsulated tocotrienols in bulk oil (87.5%). When the tocotrienols were incorporated into yogurt, the TM and bulk oil forms showed a loss of 23.5% and 81.0%, respectively. Generally, the tocotrienols were stable in the TM form and showed highest stability when these TM were added into yogurt. δ-Tocotrienol was the most stable isomer in both forms during storage and when incorporated into yogurt. The addition of TM into yogurt caused minimal changes in the yogurt's color and texture but slightly altered the yogurt's viscosity.
    MeSH terms: Alginates; Capsules; Hexuronic Acids; Yogurt*; Glucuronic Acid; Tocotrienols/chemistry*; Chitosan
  3. Hweissa NA, Su TT
    Eur J Cancer Care (Engl), 2018 Jan;27(1).
    PMID: 28960640 DOI: 10.1111/ecc.12750
    Cervical cancer is still a public health problem worldwide, and almost 80% of cervical cancer cases occur in developing countries. In Libya, cervical cancer ranks as the third most frequent cancer among women. This paper presents the results of a study conducted to assess women's awareness of the symptoms and risk factors of cervical cancer and to identify socio-demographic variations in their level of awareness. A population-based cross-sectional survey was carried out in the city of Az-Zawiya, Libya from 1 January 2014 to 31 August 2014. A total of 412 adult women of the reproductive age (18-50 years) were selected randomly from the population registry. A face-to-face interview was conducted, using a validated Arabic version of the Cervical Cancer Awareness Measure (CAM) questionnaire. More than 63% of respondents were unable to recall any warning signs and 66.7% were unable to recall any risk factors. Respondents scored considerably higher on recognition rather than on recall for both the warning signs and the risk factors of cervical cancer. Recall and recognition of cervical cancer symptoms and risk factors were higher in women who had a higher level of education and who earned a higher income. However, overall awareness of cervical cancer symptoms and risk factors among women in the city Az-Zawiya in Libya was low. The findings underline the need to improve public awareness of cervical cancer and its prevention by using several health promotion strategies.
    MeSH terms: Adolescent; Adult; Uterine Cervical Neoplasms*; Cross-Sectional Studies; Educational Status*; Employment*; Female; Humans; Income*; Health Knowledge, Attitudes, Practice*; Libya; Middle Aged; Mental Recall; Risk Factors; Marital Status*; Recognition (Psychology); Young Adult
  4. Yap YH, Lim MSW, Lee ZY, Lai KC, Jamaal MA, Wong FH, et al.
    Ultrason Sonochem, 2018 Jan;40(Pt A):57-67.
    PMID: 28946460 DOI: 10.1016/j.ultsonch.2017.06.032
    The utilisation of ultrasound in chemical preparation has been the focus of intense study in various fields, including materials science and engineering. This paper presents a novel method of synthesising the copper-manganese oxide (Hopcalite) catalyst that is used for the removal of volatile organic compounds and greenhouse gases like carbon monoxide. Several samples prepared under different conditions, with and without ultrasound, were subjected to a series of characterisation tests such as XRD, BET, FE-SEM, EDX, TPR-H2, TGA and FT-IR in order to establish their chemical and physical properties. A series of catalytic tests using a micro-reactor were subsequently performed on the samples in order to substantiate the aforementioned properties by analysing their ability to oxidise compressed natural gas (CNG), containing methane and sulphur dioxide. Results showed that ultrasonic irradiation of the catalyst led to observable alterations in its morphology: surfaces of the particles were noticeably smoothed and an increased in amorphicity was detected. Furthermore, ultrasonic irradiation has shown to enhance the catalytic activity of Hopcalite, achieving a higher conversion of methane relative to non-sonicated samples. Varying the ultrasonic intensity also produced appreciable effects, whereby an increase in intensity results in a higher conversion rate. The catalyst sonicated at the highest intensity of 29.7W/cm2has a methane conversion rate of 13.5% at 400°C, which was the highest among all the samples tested.
  5. Sodipo BK, Aziz AA
    Ultrason Sonochem, 2018 Jan;40(Pt A):837-840.
    PMID: 28946493 DOI: 10.1016/j.ultsonch.2017.08.040
    Superparamagnetic iron oxide nanoparticles (SPION) are material of interest for biomedical research and related applications. Recently, several works have reported facile sonochemical method of functionalizing nanoparticles with organic coupling agents. Herein, we present the influence of ultrasonic irradiation on the rate of functionalization of 3-amino propyl triethoxyl silane (APTES) on SPION. The effect of sonication on the process is investigated by varying the sonication period between 1 and 20min. Grafting of the organo-metallic molecules on SPION is demonstrated through FTIR and XPS. The results show that in one minute, organo-silane compound can be functionalized onto SPION through unique conditions generated from ultrasonic irradiation. The XPS survey spectra of the as-synthesized APTES-SPION at different sonication periods revealed that absorbed energy due to silanization reactions in all the samples appeared at same peaks. The percentage atomic concentrations of all the elements present in the as-synthesized APTES-SPION are determined by the software CASAXPS. The result demonstrated that highest percentage atomic concentration is observed at the one minute sonication period.
  6. Jeevaratnam K, Chadda KR, Huang CL, Camm AJ
    J Cardiovasc Pharmacol Ther, 2018 03;23(2):119-129.
    PMID: 28946759 DOI: 10.1177/1074248417729880
    The development of novel drugs specifically directed at the ion channels underlying particular features of cardiac action potential (AP) initiation, recovery, and refractoriness would contribute to an optimized approach to antiarrhythmic therapy that minimizes potential cardiac and extracardiac toxicity. Of these, K+ channels contribute numerous and diverse currents with specific actions on different phases in the time course of AP repolarization. These features and their site-specific distribution make particular K+ channel types attractive therapeutic targets for the development of pharmacological agents attempting antiarrhythmic therapy in conditions such as atrial fibrillation. However, progress in the development of such temporally and spatially selective antiarrhythmic drugs against particular ion channels has been relatively limited, particularly in view of our incomplete understanding of the complex physiological roles and interactions of the various ionic currents. This review summarizes the physiological properties of the main cardiac potassium channels and the way in which they modulate cardiac electrical activity and then critiques a number of available potential antiarrhythmic drugs directed at them.
    MeSH terms: Action Potentials; Animals; Anti-Arrhythmia Agents/therapeutic use; Heart Diseases/drug therapy; Heart Diseases/metabolism*; Heart Diseases/physiopathology; Humans; Potassium Channels/drug effects; Potassium Channels/metabolism*; Potassium Channel Blockers/therapeutic use; Myocytes, Cardiac/drug effects; Myocytes, Cardiac/metabolism*; Molecular Targeted Therapy
  7. Li D, Faiza M, Ali S, Wang W, Tan CP, Yang B, et al.
    Appl Biochem Biotechnol, 2018 Apr;184(4):1061-1072.
    PMID: 28948493 DOI: 10.1007/s12010-017-2594-1
    A highly efficient process for reducing the fatty acid (FA) content of high-acid rice bran oil (RBO) was developed by immobilized partial glycerides-selective lipase SMG1-F278N-catalyzed esterification/transesterification using methanol as a novel acyl acceptor. Molecular docking simulation indicated that methanol was much closer to the catalytic serine (Ser-171) compared with ethanol and glycerol, which might be one of the reasons for its high efficiency in the deacidification of high-acid RBO. Additionally, the reaction parameters were optimized to minimize the FA content of high-acid RBO. Under the optimal conditions (substrate molar ratio of methanol to FAs of 1.8:1, enzyme loading of 40 U/g, and at 30 °C), FA content decreased from 25.14 to 0.03% after 6 h of reaction. Immobilized SMG1-F278N exhibited excellent methanol tolerance and retained almost 100% of its initial activity after being used for ten batches. After purification by molecular distillation, the final product contained 97.86% triacylglycerol, 2.10% diacylglycerol, and 0.04% FA. The acid value of the final product was 0.09 mg KOH/g, which reached the grade one standard of edible oil. Overall, methanol was a superior acyl acceptor for the deacidification of high-acid RBO and the high reusability of immobilized SMG1-F278N indicates an economically attractive process.
    MeSH terms: Methanol/chemistry*; Molecular Docking Simulation*
  8. Ahmad S, Valli H, Salvage SC, Grace AA, Jeevaratnam K, Huang CL
    Clin Exp Pharmacol Physiol, 2018 02;45(2):174-186.
    PMID: 28949414 DOI: 10.1111/1440-1681.12863
    Increasing evidence implicates chronic energetic dysfunction in human cardiac arrhythmias. Mitochondrial impairment through Pgc-1β knockout is known to produce a murine arrhythmic phenotype. However, the cumulative effect of this with advancing age and its electrocardiographic basis have not been previously studied. Young (12-16 weeks) and aged (>52 weeks), wild type (WT) (n = 5 and 8) and Pgc-1β-/- (n = 9 and 6), mice were anaesthetised and used for electrocardiographic (ECG) recordings. Time intervals separating successive ECG deflections were analysed for differences between groups before and after β1-adrenergic (intraperitoneal dobutamine 3 mg/kg) challenge. Heart rates before dobutamine challenge were indistinguishable between groups. The Pgc-1β-/- genotype however displayed compromised nodal function in response to adrenergic challenge. This manifested as an impaired heart rate response suggesting a functional defect at the level of the sino-atrial node, and a negative dromotropic response suggesting an atrioventricular conduction defect. Incidences of the latter were most pronounced in the aged Pgc-1β-/- mice. Moreover, Pgc-1β-/- mice displayed electrocardiographic features consistent with the existence of a pro-arrhythmic substrate. Firstly, ventricular activation was prolonged in these mice consistent with slowed action potential conduction and is reported here for the first time. Additionally, Pgc-1β-/- mice had shorter repolarisation intervals. These were likely attributable to altered K+ conductance properties, ultimately resulting in a shortened QTc interval, which is also known to be associated with increased arrhythmic risk. ECG analysis thus yielded electrophysiological findings bearing on potential arrhythmogenicity in intact Pgc-1β-/- systems in widespread cardiac regions.
    MeSH terms: Aging/physiology*; Animals; Electrocardiography*; Gene Expression Regulation/physiology*; Mice, Knockout; Mice; Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha/genetics; Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha/metabolism*
  9. Kandasamy G, Shaleh SRM
    Bioresour Technol, 2018 Jan;247:327-331.
    PMID: 28950142 DOI: 10.1016/j.biortech.2017.08.187
    A new approach to recover microalgae from aqueous medium using a bio-flotation method is reported. The method involves utilizing a Moringa protein extract - oil emulsion (MPOE) for flotation removal of Nannochloropsis sp. The effect of various factors has been assessed using this method, including operating parameters such as pH, MPOE dose, algae concentration and mixing time. A maximum flotation efficiency of 86.5% was achieved without changing the pH condition of algal medium. Moreover, zeta potential analysis showed a marked difference in the zeta potential values when increase the MPOE dose concentration. An optimum condition of MPOE dosage of 50ml/L, pH 8, mixing time 4min, and a flotation efficiency of greater than 86% was accomplished. The morphology of algal flocs produced by protein-oil emulsion flocculant were characterized by microscopy. This flotation method is not only simple, but also an efficient method for harvesting microalgae from culture medium.
    MeSH terms: Emulsions; Flocculation; Oils; Proteins*; Moringa; Microalgae*
  10. Mohamed N, Muhammad N, Shuid AN, Soelaiman IN
    Curr Drug Targets, 2018;19(12):1424-1430.
    PMID: 28950810 DOI: 10.2174/1389450118666170925154428
    Nicotine is one of the most abused substances worldwide and can cause several harmful effects on health. One of the harmful effects, which is often ignored, is osteoporosis. Smoking has been shown to cause a decrease in bone mineral density in humans. Animal studies have proven that nicotine exerts negative effects on bone. The number of people who smoke increases each day. Those who smoke start at a very young age and they usually smoke for years. This will increase the risk of developing osteoporosis. As the prevalence of osteoporosis increases, the risk of fractures also increases. The major concerns are disability following fractures, mortality due to complications after fractures and the increasing cost of management and therapy. This paper will review the effects of nicotine on bone and the potential natural products which can be used as treatment for nicotine-induced osteoporosis.
    MeSH terms: Humans; Nicotine/adverse effects*; Osteoporosis/chemically induced*; Osteoporosis/diet therapy*; Osteoporosis/prevention & control; Smoking; Bone Density
  11. Chin KY, Mark-Lee WF
    Curr Drug Targets, 2018;19(12):1359-1365.
    PMID: 28950813 DOI: 10.2174/1389450118666170925154025
    Mitragyna speciosa is a tropical plant with narcotic effects. The antinociceptive effects of its crude extracts, bioactive compounds and structurally modified derivatives have been examined in rodent models. This review aims to summarize the evidence on the antinociceptive effects of M. speciosa and its derivatives and explore whether they can offer an alternative to morphine in pain management. Methanolic and alkaloid extracts of M. speciosa were shown to attenuate the nociceptive response in rodents. Mitragynine and 7-hydroxymitragynine offered better antinociceptive effects than crude extracts. Structurally modified derivatives of 7-hydroxymitragynine, such as MGM-9, MGM- 15, MGM-16, demonstrated superior antinociceptive effects compared to morphine. M. speciosa and its derivatives mainly act on the opioid receptor, but receptor subtypes specificity differs between each compound. The tolerance and adverse side effects of M. speciosa and its derivatives are similar with morphine. The affinity of MGM-9 on kappa-opioid receptor could potentially limit the effects of drug dependence. In conclusion, M speciosa derivatives can offer alternatives to morphine in controlling chronic pain. Structural modification of mitragynine and 7-hydroxymitragynine can generate compounds with higher potency and lesser side-effects. Human clinical trials are required to validate the use of these compounds in clinical setting.
    MeSH terms: Analgesics/adverse effects; Analgesics/therapeutic use*; Analgesics/chemistry; Animals; Disease Models, Animal; Drug Tolerance; Narcotic Antagonists/adverse effects; Narcotic Antagonists/therapeutic use*; Narcotic Antagonists/chemistry; Plant Extracts/adverse effects; Plant Extracts/therapeutic use*; Plant Extracts/chemistry; Substance-Related Disorders; Mitragyna/chemistry*; Mice; Pain Management/methods*
  12. Islam MA, Alam F, Gan SH, Cavestro C, Wong KK
    Cephalalgia, 2018 03;38(3):568-580.
    PMID: 28952322 DOI: 10.1177/0333102417694881
    Background The occurrence of antiphospholipid antibodies (aPLs) and headache comorbidity in the presence or absence of underlying autoimmune diseases remains unclear. Aim The aim of this review was to summarize the relationship between headache and aPLs based on evidences from cohort studies and case reports, in addition to examining the treatment strategies that resolved headache in aPLs-positive individuals.
    Methods A comprehensive literature search was conducted through PubMed, ISI Web of Science and Google Scholar. A total of 559 articles were screened and the appropriate articles were selected based on quality and level of evidence.
    Results Cohort studies (n = 27) from Europe, North America and Asia demonstrated comorbidity of aPLs and headache in antiphospholipid syndrome, systemic lupus erythematosus (SLE) and neuropsychiatric SLE patients. Significantly higher association between migraine and aPLs was observed (n = 170/779; p 
    MeSH terms: Adult; Female; Headache/blood*; Headache/complications; Headache/immunology*; Humans; Lupus Erythematosus, Systemic/epidemiology; Male; Middle Aged; Comorbidity; Antiphospholipid Syndrome/epidemiology; Antibodies, Antiphospholipid/blood*
  13. Negrini S, Arienti C, Gimigliano F, Grubišić F, Howe T, Ilieva E, et al.
    Am J Phys Med Rehabil, 2018 01;97(1):68-71.
    PMID: 28953033 DOI: 10.1097/PHM.0000000000000832
    MeSH terms: Clinical Competence; Humans; Organizations, Nonprofit/organization & administration*; Physical and Rehabilitation Medicine/standards*; Evidence-Based Medicine*
  14. Razali MF, Mahmud AS, Mokhtar N
    J Mech Behav Biomed Mater, 2018 Jan;77:234-241.
    PMID: 28954242 DOI: 10.1016/j.jmbbm.2017.09.021
    NiTi arch wires are used widely in orthodontic treatment due to its superelastic and biocompatibility properties. In brackets configuration, the force released from the arch wire is influenced by the sliding resistances developed on the arch wire-bracket contact. This study investigated the evolution of the forces released by a rectangular NiTi arch wire towards possible intraoral temperature and deflection changes. A three dimensional finite element model was developed to measure the force-deflection behavior of superelastic arch wire. Finite element analysis was used to distinguish the martensite fraction and phase state of arch wire microstructure in relation to the magnitude of wire deflection. The predicted tensile and bending results from the numerical model showed a good agreement with the experimental results. As contact developed between the wire and bracket, binding influenced the force-deflection curve by changing the martensitic transformation plateau into a slope. The arch wire recovered from greater magnitude of deflection released lower force than one recovered from smaller deflection. In contrast, it was observed that the plateau slope increased from 0.66N/mm to 1.1N/mm when the temperature was increased from 26°C to 46°C.
    MeSH terms: Dental Alloys/chemistry*; Dental Stress Analysis*; Elasticity; Materials Testing; Models, Theoretical; Nickel/chemistry*; Orthodontic Wires*; Stress, Mechanical; Temperature; Tensile Strength; Titanium/chemistry*; Finite Element Analysis; Mechanical Phenomena
  15. Krackhardt F, Rosli MA, Leschke M, Schneider A, Sperling C, Heang TM, et al.
    Catheter Cardiovasc Interv, 2018 06;91(7):1221-1228.
    PMID: 28944613 DOI: 10.1002/ccd.27306
    OBJECTIVE: The objective of this study was to compare the safety and efficacy of a polymer-free sirolimus coated, ultrathin strut drug eluting stent (PF-SES) to its uncoated bare-metal stent (BMS) platform of identical stent architecture.

    BACKGROUND: Recently published randomized trials comparing BMS to DES with a focus on shortened dual-antiplatelet therapy reported incidences of stent thrombosis (ST) and bleeding complications (LEADERS FREE) in favor of drug eluting stents (DES).

    METHODS: Data of previously published large-sale, international, single-armed, multicenter, observational studies of ultra-thin PF-SES, and BMS were propensity score (PS) matched for selected lesion morphological and cardiovascular risk factors to compare target lesion revascularization (TLR), myocardial infarction, cardiac death, major adverse cardiac events (MACE), bleeding complications and ST rates. Primary endpoint in both studies was TLR at 9 months.

    RESULTS: At 9 months the rates of TLR was significantly lower in the PF-SES group as compared with patients treated with the BMS analogue of identical stent design (1.4% vs. 4.6%, P = 0.005). Likewise the 9-month MACE rates were lower in the PF-SES group (3.2% vs. 8.7%, P = 0.001) whereas there were no differences in the accumulated ST rates (0.5% vs. 1.5%, P = 0.109). Overall accumulated bleeding incidences (BARC 1-5) were not significantly different between PF-SES and BMS patients (1.8% vs. 2.7%, p = 0.388).

    CONCLUSIONS: PF-SES are superior over analogue BMS of identical stent architecture in daily clinical routine with lower rates of TLR and MACE in a PS-matched, unselected patient population without differences in accumulated ST rates and bleeding frequencies given the currently favored postprocedural comedication (ClinicalTrials.gov Identifier NCT02629575).

    MeSH terms: Aged; Aged, 80 and over; Asia; Cardiovascular Agents/administration & dosage*; Cardiovascular Agents/adverse effects; Coronary Artery Disease/mortality; Coronary Artery Disease/surgery*; Europe; Female; Humans; Male; Metals*; Middle Aged; Postoperative Complications/etiology; Postoperative Complications/mortality; Postoperative Complications/surgery; Probucol/administration & dosage*; Probucol/adverse effects; Prospective Studies; Prosthesis Design; Registries; Risk Factors; Time Factors; Treatment Outcome; Risk Assessment; Sirolimus/administration & dosage*; Sirolimus/adverse effects; Drug-Eluting Stents*; Propensity Score; Percutaneous Coronary Intervention/adverse effects; Percutaneous Coronary Intervention/instrumentation*; Percutaneous Coronary Intervention/mortality
  16. Trinh H, Yusup S, Uemura Y
    Bioresour Technol, 2018 Jan;247:51-57.
    PMID: 28946094 DOI: 10.1016/j.biortech.2017.09.075
    Recently, rubber seed oil (RSO) has been considered as a promising potential oil source for biodiesel production. However, RSO is a non-edible feedstock with a significant high free fatty acid (FFA) content which has an adverse impact on the process of biodiesel production. In this study, ultrasonic-assisted esterification process was conducted as a pre-treatment step to reduce the high FFA content of RSO from 40.14% to 0.75%. Response surface methodology (RSM) using central composite design (CCD) was applied to the design of experiments (DOE) and the optimization of esterification process. The result showed that methanol to oil molar ratio was the most influential factor for FFA reduction whereas the effect of amount of catalyst and the reaction were both insignificant. The kinetic study revealed that the activation energy and the frequency factor of the process are 52.577kJ/mol and 3.53×108min-1, respectively.
    MeSH terms: Catalysis; Esterification; Fats, Unsaturated*; Kinetics; Plant Oils; Ultrasonics*; Biofuels
  17. Sugumaran S, Jamlos MF, Ahmad MN, Bellan CS, Schreurs D
    Biosens Bioelectron, 2018 Feb 15;100:361-373.
    PMID: 28946108 DOI: 10.1016/j.bios.2017.08.044
    Early cancer detection and treatment is an emerging and fascinating field of plasmonic nanobiosensor research. It paves to enrich a life without affecting living cells leading to a possible survival of the patient. This review describes a past and future prospect of an integrated research field on nanostructured metamaterials, microwave transmission, surface plasmonic resonance, nanoantennas, and their manifested versatile properties with nano-biosensors towards early cancer detection to preserve human health. Interestingly, (i) microwave transmission shows more advantages than other electromagnetic radiation in reacting with biological tissues, (ii) nanostructured metamaterial (Au) with special properties like size and shape can stimulate plasmonic effects, (iii) plasmonic based nanobiosensors are to explore the efficacy for early cancer tumour detection or single molecular detection and (iv) nanoantenna wireless communication by using microwave inverse scattering nanomesh (MISN) technique instead of conventional techniques can be adopted to characterize the microwave scattered signals from the biomarkers. It reveals that the nanostructured material with plasmonic nanobiosensor paves a fascinating platform towards early detection of cancer tumour and is anticipated to be exploited as a magnificent field in the future.
  18. Huarte-Bonnet C, Kumar S, Saparrat MCN, Girotti JR, Santana M, Hallsworth JE, et al.
    Appl Biochem Biotechnol, 2018 Mar;184(3):1047-1060.
    PMID: 28942502 DOI: 10.1007/s12010-017-2608-z
    Several filamentous fungi are able to concomitantly assimilate both aliphatic and polycyclic aromatic hydrocarbons that are the biogenic by-products of some industrial processes. Cytochrome P450 monooxygenases catalyze the first oxidation reaction for both types of substrate. Among the cytochrome P450 (CYP) genes, the family CYP52 is implicated in the first hydroxylation step in alkane-assimilation processes, while genes belonging to the family CYP53 have been linked with oxidation of aromatic hydrocarbons. Here, we perform a comparative analysis of CYP genes belonging to clans CYP52 and CYP53 in Aspergillus niger, Beauveria bassiana, Metarhizium robertsii (formerly M. anisopliae var. anisopliae), and Penicillium chrysogenum. These species were able to assimilate n-hexadecane, n-octacosane, and phenanthrene, exhibiting a species-dependent modification in pH of the nutrient medium during this process. Modeling of the molecular docking of the hydrocarbons to the cytochrome P450 active site revealed that both phenanthrene and n-octacosane are energetically favored as substrates for the enzymes codified by genes belonging to both CYP52 and CYP53 clans, and thus appear to be involved in this oxidation step. Analyses of gene expression revealed that CYP53 members were significantly induced by phenanthrene in all species studied, but only CYP52X1 and CYP53A11 from B. bassiana were highly induced with n-alkanes. These findings suggest that the set of P450 enzymes involved in hydrocarbon assimilation by fungi is dependent on phylogeny and reveal distinct substrate and expression specificities.
    MeSH terms: Hydrocarbons, Cyclic/metabolism*
  19. Shariat A, Cleland JA, Danaee M, Kargarfard M, Sangelaji B, Tamrin SBM
    Braz J Phys Ther, 2018;22(2):144-153.
    PMID: 28939263 DOI: 10.1016/j.bjpt.2017.09.003
    OBJECTIVE: To evaluate the effectiveness of exercise, ergonomic modification, and a combination of training exercise and ergonomic modification on the scores of pain in office workers with neck, shoulders, and lower back pain.

    METHODS: Participants (N=142) in this randomized controlled trial were office workers aged 20-50 years old with neck, shoulders, and lower back pain. They were randomly assigned to either the ergonomic modification group, the exercise group, the combined exercise and ergonomic modification group, or the control group (no-treatment). The exercise training group performed a series of stretching exercises, while the ergonomic group received some modification in the working place. Outcome measures were assessed by the Cornell Musculoskeletal Disorders Questionnaire at baseline, after 2, 4, and 6 months of intervention.

    RESULTS: There was significant differences in pain scores for neck (MD -10.55; 95%CI -14.36 to -6.74), right shoulder (MD -12.17; 95%CI -16.87 to -7.47), left shoulder (MD -11.1; 95%CI -15.1 to -7.09) and lower back (MD -7.8; 95%CI -11.08 to -4.53) between the exercise and control groups. Also, significant differences were seen in pain scores for neck (MD -9.99; 95%CI -13.63 to -6.36), right shoulder (MD -11.12; 95%CI -15.59 to -6.65), left shoulder (MD -10.67; 95%CI -14.49 to -6.85) and lower back (MD -6.87; 95%CI -10 to -3.74) between the combined exercise and ergonomic modification and control groups. The significant improvement from month 4 to 6, was only seen in exercise group (p<0.05).

    CONCLUSION: To have a long term effective on MSDs, physical therapists and occupational therapists should use stretching exercises in their treatment programs rather than solely rely on ergonomic modification.

    CLINICAL TRIAL ID: NCT02874950 - https://www.clinicaltrials.gov/ct2/show/NCT02874950.

    MeSH terms: Exercise Therapy*; Humans; Human Engineering; Musculoskeletal Diseases/rehabilitation*; Surveys and Questionnaires; Low Back Pain/rehabilitation*; Workplace; Neck Pain/rehabilitation*
  20. Aziz J, Ahmad MF, Rahman MT, Yahya NA, Czernuszka J, Radzi Z
    Int J Biol Macromol, 2018 Feb;107(Pt A):1030-1038.
    PMID: 28939521 DOI: 10.1016/j.ijbiomac.2017.09.066
    Successful use of tissue expanders depends on the quality of expanded tissue. This study evaluates the impact of anisotropic self-inflating tissue expander (SITE) on the biomechanics of skin. Two different SITE were implanted subcutaneously on sheep scalps; SITE that requires 30days for maximum expansion (Group A; n=5), and SITE that requires 21days for maximum expansion (Group B; n=5). Control animals (n=5) were maintained without SITE implantation. Young's Modulus, D-periodicity, overlap and gap region length, diameter, and height difference between overlap and gap regions on collagen fibrils were analyzed using atomic force microscopy. Histology showed no significant differences in dermal thickness between control and expanded skin of groups A and B. Furthermore, most parameters of expanded skin were similar to controls (p>0.05). However, the height difference between overlap and gap regions was significantly smaller in group B compared to both control and group A (p<0.01). Strong correlation was observed between Young's Modulus of overlap and gap regions of the control and group A, but not group B. Results suggest that a relatively slower SITE can be useful in reconstructive surgery to maintain the biomechanical properties of expanded skin.
    MeSH terms: Animals; Biomechanical Phenomena; Collagen/ultrastructure; Collagen/chemistry*; Extracellular Matrix; Scalp/ultrastructure; Scalp/chemistry*; Sheep; Skin/ultrastructure; Skin/chemistry*; Tissue Expansion Devices*; Tissue Expansion/methods; Microscopy, Atomic Force; Elastic Modulus
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