Browse publications by year: 2016

  1. Khoo JJ, Ng CS, Sabaratnam S, Arulanantham S
    Asian Pac J Cancer Prev, 2016;17(3):1149-55.
    PMID: 27039740
    BACKGROUND: Examination of sentinel lymph node (SLN) biopsies provides accurate nodal staging for breast cancer and plays a key role in patient management. Procurement of SLNs and the methods used to process specimens are equally important. Increasing the level of detail in histopathological examination of SLNs increases detection of metastatic tumours but will also increase the burden of busy laboratories and thus may not be carried out routinely. Recommendation of a reasonable standard in SLN examination is required to ensure high sensitivity of results while maintaining a manageable practice workload.

    MATERIALS AND METHODS: Twenty-four patients with clinically node-negative breast cancer were recruited. Combined radiotracer and blue dye methods were used for identification of SLNs. The nodes were thinly sliced and embedded. Serial sectioning and immunohistochemical (IHC) staining against AE1/AE3 were performed if initial HandE sections of the blocks were negative.

    RESULTS: SLNs were successfully identified in all patients. Ten cases had nodal metastases with 7 detected in SLNs and 3 detected only in axillary nodes (false negative rate, FNR=30%). Some 5 out of 7 metastatic lesions in the SLNs (71.4%) were detected in initial sections of the thinly sliced tissue. Serial sectioning detected the remaining two cases with either micrometastases or isolated tumour cells (ITC).

    CONCLUSIONS: Thin slicing of tissue to 3-5mm thickness and serial sectioning improved the detection of micro and macro-metastases but the additional burden of serial sectioning gave low yield of micrometastases or ITC and may not be cost effective. IHC validation did not further increase sensitivity of detection. Therefore its use should only be limited to confirmation of suspicious lesions. False negative cases where SLNs were not involved could be due to skipped metastases to non-sentinel nodes or poor technique during procurement, resulting in missed detection of actual SLNs.

    MeSH terms: Adult; Aged; Aged, 80 and over; Axilla; Breast Neoplasms/pathology*; Breast Neoplasms/surgery; Female; Follow-Up Studies; Humans; Lymph Nodes/pathology*; Lymph Nodes/surgery; Lymphatic Metastasis; Middle Aged; Neoplasm Invasiveness; Neoplasm Staging; Pilot Projects; Prognosis; Prospective Studies; Carcinoma, Ductal, Breast/secondary*; Carcinoma, Ductal, Breast/surgery; Carcinoma, Lobular/secondary*; Carcinoma, Lobular/surgery; Sentinel Lymph Node Biopsy; Neoplasm Micrometastasis
  2. Patil P, Hazarey V, Chaudhari R, Nimbalkar-Patil S
    Asian Pac J Cancer Prev, 2016;17(3):1255-9.
    PMID: 27039756
    BACKGROUND: Oral physiotherapy or mouth exercise is considered to be an adjunct but mandatory treatment modality for oral submucous fibrosis (OSMF). This study planned to evaluate the clinical efficacy of a newly designed mouth exercising device (MED) in OSMF patients receiving local ointment, intra-lesional drugs and surgical treatment.

    MATERIALS AND METHODS: A total of 231 OSMF patients were selected and treated with basic regime including topical corticosteroids, oral antioxidants and the icecream-stick exercise regime and allotted randomly to two equal groups A and B. Group-A patients were additionally given MED. Subgroups A1 and B1 patients with an inter-incisal distance (IID) 20-35mm were not given any additional therapy; subgroup A2 and B2 patients (IID 20-35mm) were treated additionally with intra-lesional injections. Subgroups A3 and B3 with IID<20mm were managed surgically. IID was measured at baseline and at 6 months recall. The change in IID measurements was calculated and statistically analyzed using 2-way ANOVA and Tukeys multiple post hoc analysis.

    RESULTS: Average improvement in IID after six months of recall visits was observed to be 8.4 mm in subgroup-A1 (n-53) compared to 5.5 mm in B1(n-50) (p<0.01). The IID improvement in subgroup-A2 was found to be 9.3mm (n-46) compared to 5.1 mm in B2 (n-48) (p<0.01). In the surgery group, mouth opening improvement was observed to be 9.6 mm in subgroup A3 (n-18) compared to 4.8 mm for B3 (n-16) (p<0.01).

    CONCLUSIONS: Use of the MED appears to be effective for increasing oral opening in OMSF patients in conjunction with local, injection and/or surgical treatment.

    MeSH terms: Administration, Oral; Administration, Topical; Adolescent; Adult; Anti-Inflammatory Agents/administration & dosage; Antioxidants/administration & dosage*; Clobetasol/administration & dosage*; Exercise Therapy/instrumentation*; Female; Follow-Up Studies; Humans; Injections; Male; Ointments/administration & dosage*; Oral Submucous Fibrosis/drug therapy; Oral Submucous Fibrosis/therapy*; Orthodontic Wires/statistics & numerical data*; Prognosis; Young Adult
  3. Tee GH, Aris T, Rarick J, Irimie S
    Asian Pac J Cancer Prev, 2016;17(3):1269-76.
    PMID: 27039759
    BACKGROUND: Tobacco consumption continues to be the leading cause of preventable deaths globally. The objective of this study was to examine the associaton of selected socio-demographic variables with current tobacco use in five countries that participated in the Phase II Global Adult Tobacco Survey in 2011 - 2012.

    MATERIALS AND METHODS: We analysed internationally comparable representative household survey data from 33,482 respondents aged ≥ 15 years in Indonesia, Malaysia, Romania, Argentina and Nigeria for determinants of tobacco use within each country. Socio-demographic variables analysed included gender, age, residency, education, wealth index and awareness of smoking health consequences. Current tobacco use was defined as smoking or use of smokeless tobacco daily or occasionally.

    RESULTS: The overall prevalence of tobacco use varied from 5.5% in Nigeria to 35.7% in Indonesia and was significantly higher among males than females in all five countries. Odds ratios for current tobacco use were significantly higher among males for all countries [with the greatest odds among Indonesian men (OR=67.4, 95% CI: 51.2-88.7)] and among urban dwellers in Romania. The odds of current tobacco use decreased as age increased for all countries except Nigeria where. The reverse was true for Argentina and Nigeria. Significant trends for decreasing tobacco use with increasing educational levels and wealth index were seen in Indonesia, Malaysia and Romania. Significant negative associations between current tobacco use and awareness of adverse health consequences of smoking were found in all countries except Argentina.

    CONCLUSIONS: Males and the socially and economically disadvantaged populations are at the greatest risk of tobacco use. Tobacco control interventions maybe tailored to this segment of population and incorporate educational interventions to increase knowledge of adverse health consequences of smoking.

    MeSH terms: Adolescent; Adult; Aged; Argentina/epidemiology; Cross-Sectional Studies; Female; Follow-Up Studies; Humans; Income; Indonesia/epidemiology; Malaysia/epidemiology; Male; Middle Aged; Nigeria/epidemiology; Romania/epidemiology; Smoking/epidemiology*; Socioeconomic Factors; Tobacco Use Disorder/epidemiology*; Prevalence; Young Adult; Social Determinants of Health*
  4. Ahmadian M, Carmack S, Samah AA, Kreps G, Saidu MB
    Asian Pac J Cancer Prev, 2016;17(3):1277-84.
    PMID: 27039760
    BACKGROUND: Early detection is a critical part of reducing the burden of breast cancer and breast selfexamination (BSE) has been found to be an especially important early detection strategy in low and middle income countries such as Malaysia. Although reports indicate that Malaysian women report an increase in BSE activity in recent years, additional research is needed to explore factors that may help to increase this behavior among Southeastern Asian women.

    OBJECTIVE: This study is the first of its kind to explore how the predicting variables of self-efficacy, perceived barriers, and body image factors correlate with self-reports of past BSE, and intention to conduct future breast self-exams among female students in Malaysia.

    MATERIALS AND METHODS: Through the analysis of data collected from a prior study of female students from nine Malaysian universities (n=842), this study found that self-efficacy, perceived barriers and specific body image sub-constructs (MBSRQ-Appearance Scales) were correlated with, and at times predicted, both the likelihood of past BSE and the intention to conduct breast self-exams in the future.

    RESULTS: Self-efficacy (SE) positively predicted the likelihood of past self-exam behavior, and intention to conduct future breast self-exams. Perceived barriers (BR) negatively predicted past behavior and future intention of breast self-exams. The body image sub-constructs of appearance evaluation (AE) and overweight preoccupation (OWP) predicted the likelihood of past behavior but did not predict intention for future behavior. Appearance orientation (AO) had a somewhat opposite effect: AO did not correlate with or predict past behavior but did correlate with intention to conduct breast self-exams in the future. The body image sub-constructs of body area satisfaction (BASS) and self-classified weight (SCW) showed no correlation with the subjects' past breast self-exam behavior nor with their intention to conduct breast self-exams in the future.

    CONCLUSIONS: Findings from this study indicate that both self-efficacy and perceived barriers to BSE are significant psychosocial factors that influence BSE behavior. These results suggest that health promotion interventions that help enhance self-efficacy and reduce perceived barriers have the potential to increase the intentions of Malaysian women to perform breast self-exams, which can promote early detection of breast cancers. Future research should evaluate targeted communication interventions for addressing self-efficacy and perceived barriers to breast self-exams with at-risk Malaysian women. and further explore the relationship between BSE and body image.
    MeSH terms: Adolescent; Adult; Body Image*; Breast Neoplasms/diagnosis*; Breast Neoplasms/epidemiology; Breast Neoplasms/psychology; Female; Follow-Up Studies; Humans; Health Knowledge, Attitudes, Practice; Malaysia/epidemiology; Middle Aged; Prognosis; Surveys and Questionnaires; Students/psychology*; Health Behavior*; Breast Self-Examination/psychology; Breast Self-Examination/statistics & numerical data*; Self Efficacy*; Early Detection of Cancer/psychology; Early Detection of Cancer/statistics & numerical data*; Young Adult
  5. Danial M, Sivasangari S, Arulappen A, Ong L
    Asian Pac J Cancer Prev, 2016;17(3):1363-8.
    PMID: 27039773
    Human papillomavirus (HPV) is a prevalent sexually transmitted infection with serious medical, sexual, and relationship consequences. HPV vaccine protection is available globally but unfortunately vaccine uptake is inconsistent everywhere. From this study, it was observed that the awareness of cervical cancer, HPV virus and HPV vaccination in Malaysia is high, at 83.1%, 73.9% and 73.3% of respondents, respectively. However, a considerably low percentage had undergone HPV vaccination (8.6%) compared to those who had experienced a Pap smear (32.9%). Awareness between cervical cancer and HPV virus and vaccination was low. Health care providers and the governing bodies have to play a vital role in disseminating holistic information on the vaccine and the importance of getting vaccinated to the public more vigorously in Malaysia.
    MeSH terms: Adolescent; Adult; Uterine Cervical Neoplasms/epidemiology; Uterine Cervical Neoplasms/prevention & control*; Uterine Cervical Neoplasms/virology; Cross-Sectional Studies; Developing Countries; Female; Follow-Up Studies; Humans; Health Knowledge, Attitudes, Practice*; Malaysia/epidemiology; Neoplasm Staging; Patient Acceptance of Health Care; Prognosis; Vaccination; Papillomaviridae/pathogenicity*; Papillomavirus Infections/epidemiology; Papillomavirus Infections/prevention & control*; Papillomavirus Infections/virology; Papillomavirus Vaccines/therapeutic use*; Young Adult; Papanicolaou Test/statistics & numerical data*
  6. Yusof MM, Abdullah NM, Sharial MM, Zaatar A
    Asian Pac J Cancer Prev, 2016;17(3):973-8.
    PMID: 27039822
    BACKGROUND: Between October 2012 and February 2015, 25 patients with metastatic colorectal cancer (mCRC) (mean age, 57.0 ± 12.1 years) were granted access to aflibercept via the Aflibercept Named Patient Program at four centers.

    MATERIALS AND METHODS: Here we reported the initial experience of aflibercept / FOLFIRI in combination. We evaluated treatment-related adverse events (AEs), progression-free survival (PFS) and overall survival (OS).

    RESULTS: The majority of the patients experienced gastrointestinal toxicity (grade 1-2), with diarrhea (52%), mucositis (52%), and nausea/vomiting (20%) being largely observed. Neutropenia (16%) and febrile neutropenia (8%) were common grade 3-4 hematological events. Aflibercept-related toxicity was managed as per practice guidelines. No grade 5 event was reported. Median PFS was 6.12 months (95% CI, 4.80-7.20) and OS was 12 months (95% CI, 9.80-14.18). The partial response (PR), stable disease (SD), and progressive disease (PD) rates were 25% (95% CI: 23.4-27.0), 37.5% (95% CI: 31.6-43.3), and 37.5% (95% CI: 22.5-52.5), respectively.

    CONCLUSIONS: Aflibercept/FOLFIRI can be administered safely in a second line setting to Malaysian patients with mCRC, as the AEs experienced were generally reversible and manageable. The safety and efficacy outcomes were consistent with those observed in Western populations.

    MeSH terms: Antineoplastic Combined Chemotherapy Protocols/adverse effects*; Antineoplastic Combined Chemotherapy Protocols/therapeutic use*; Camptothecin/administration & dosage; Camptothecin/adverse effects; Camptothecin/analogs & derivatives; Leucovorin/administration & dosage; Leucovorin/adverse effects; Female; Fluorouracil/administration & dosage; Fluorouracil/adverse effects; Humans; Male; Middle Aged; Recombinant Fusion Proteins/administration & dosage; Recombinant Fusion Proteins/adverse effects; Safety; Colorectal Neoplasms/drug therapy*; Disease-Free Survival; Receptors, Vascular Endothelial Growth Factor/administration & dosage; Asian Continental Ancestry Group; Drug-Related Side Effects and Adverse Reactions/etiology*
  7. Yusuf S, Lonn E, Pais P, Bosch J, López-Jaramillo P, Zhu J, et al.
    N Engl J Med, 2016 May 26;374(21):2032-43.
    PMID: 27039945 DOI: 10.1056/NEJMoa1600177
    BACKGROUND: Elevated blood pressure and elevated low-density lipoprotein (LDL) cholesterol increase the risk of cardiovascular disease. Lowering both should reduce the risk of cardiovascular events substantially.
    METHODS: In a trial with 2-by-2 factorial design, we randomly assigned 12,705 participants at intermediate risk who did not have cardiovascular disease to rosuvastatin (10 mg per day) or placebo and to candesartan (16 mg per day) plus hydrochlorothiazide (12.5 mg per day) or placebo. In the analyses reported here, we compared the 3180 participants assigned to combined therapy (with rosuvastatin and the two antihypertensive agents) with the 3168 participants assigned to dual placebo. The first coprimary outcome was the composite of death from cardiovascular causes, nonfatal myocardial infarction, or nonfatal stroke, and the second coprimary outcome additionally included heart failure, cardiac arrest, or revascularization. The median follow-up was 5.6 years.
    RESULTS: The decrease in the LDL cholesterol level was 33.7 mg per deciliter (0.87 mmol per liter) greater in the combined-therapy group than in the dual-placebo group, and the decrease in systolic blood pressure was 6.2 mm Hg greater with combined therapy than with dual placebo. The first coprimary outcome occurred in 113 participants (3.6%) in the combined-therapy group and in 157 (5.0%) in the dual-placebo group (hazard ratio, 0.71; 95% confidence interval [CI], 0.56 to 0.90; P=0.005). The second coprimary outcome occurred in 136 participants (4.3%) and 187 participants (5.9%), respectively (hazard ratio, 0.72; 95% CI, 0.57 to 0.89; P=0.003). Muscle weakness and dizziness were more common in the combined-therapy group than in the dual-placebo group, but the overall rate of discontinuation of the trial regimen was similar in the two groups.
    CONCLUSIONS: The combination of rosuvastatin (10 mg per day), candesartan (16 mg per day), and hydrochlorothiazide (12.5 mg per day) was associated with a significantly lower rate of cardiovascular events than dual placebo among persons at intermediate risk who did not have cardiovascular disease. (Funded by the Canadian Institutes of Health Research and AstraZeneca; ClinicalTrials.gov number, NCT00468923.).
    Note: Malaysia is a study site (Author: Yusoff K)
    MeSH terms: Rosuvastatin Calcium/administration & dosage*; Rosuvastatin Calcium/adverse effects; Aged; Antihypertensive Agents/administration & dosage*; Antihypertensive Agents/adverse effects; Benzimidazoles/administration & dosage*; Cardiovascular Diseases/epidemiology; Cardiovascular Diseases/prevention & control*; Double-Blind Method; Drug Therapy, Combination; Female; Humans; Hydrochlorothiazide/administration & dosage*; Hypertension/drug therapy*; Cholesterol, LDL/blood; Male; Middle Aged; Risk Factors; Tetrazoles/administration & dosage*; Hydroxymethylglutaryl-CoA Reductase Inhibitors/administration & dosage*; Hydroxymethylglutaryl-CoA Reductase Inhibitors/adverse effects; Medication Adherence
  8. Guarini G, Kiyooka T, Ohanyan V, Pung YF, Marzilli M, Chen YR, et al.
    Basic Res Cardiol, 2016 May;111(3):29.
    PMID: 27040114 DOI: 10.1007/s00395-016-0547-4
    Mitochondrial dysfunction in obesity and diabetes can be caused by excessive production of free radicals, which can damage mitochondrial DNA. Because mitochondrial DNA plays a key role in the production of ATP necessary for cardiac work, we hypothesized that mitochondrial dysfunction, induced by mitochondrial DNA damage, uncouples coronary blood flow from cardiac work. Myocardial blood flow (contrast echocardiography) was measured in Zucker lean (ZLN) and obese fatty (ZOF) rats during increased cardiac metabolism (product of heart rate and arterial pressure, i.v. norepinephrine). In ZLN increased metabolism augmented coronary blood flow, but in ZOF metabolic hyperemia was attenuated. Mitochondrial respiration was impaired and ROS production was greater in ZOF than ZLN. These were associated with mitochondrial DNA (mtDNA) damage in ZOF. To determine if coronary metabolic dilation, the hyperemic response induced by heightened cardiac metabolism, is linked to mitochondrial function we introduced recombinant proteins (intravenously or intraperitoneally) in ZLN and ZOF to fragment or repair mtDNA, respectively. Repair of mtDNA damage restored mitochondrial function and metabolic dilation, and reduced ROS production in ZOF; whereas induction of mtDNA damage in ZLN reduced mitochondrial function, increased ROS production, and attenuated metabolic dilation. Adequate metabolic dilation was also associated with the extracellular release of ADP, ATP, and H2O2 by cardiac myocytes; whereas myocytes from rats with impaired dilation released only H2O2. In conclusion, our results suggest that mitochondrial function plays a seminal role in connecting myocardial blood flow to metabolism, and integrity of mtDNA is central to this process.
    MeSH terms: Animals; Coronary Vessels/metabolism; Coronary Vessels/physiopathology*; Disease Models, Animal; DNA Damage/physiology; DNA, Mitochondrial/metabolism*; Mitochondria/metabolism*; Rats, Zucker; Vasodilation/physiology; Reactive Oxygen Species/metabolism; Oxidative Stress/physiology; Metabolic Syndrome X/metabolism; Metabolic Syndrome X/physiopathology*; Rats; DNA Fragmentation
  9. Yusuf S, Bosch J, Dagenais G, Zhu J, Xavier D, Liu L, et al.
    N Engl J Med, 2016 May 26;374(21):2021-31.
    PMID: 27040132 DOI: 10.1056/NEJMoa1600176
    BACKGROUND: Previous trials have shown that the use of statins to lower cholesterol reduces the risk of cardiovascular events among persons without cardiovascular disease. Those trials have involved persons with elevated lipid levels or inflammatory markers and involved mainly white persons. It is unclear whether the benefits of statins can be extended to an intermediate-risk, ethnically diverse population without cardiovascular disease.
    METHODS: In one comparison from a 2-by-2 factorial trial, we randomly assigned 12,705 participants in 21 countries who did not have cardiovascular disease and were at intermediate risk to receive rosuvastatin at a dose of 10 mg per day or placebo. The first coprimary outcome was the composite of death from cardiovascular causes, nonfatal myocardial infarction, or nonfatal stroke, and the second coprimary outcome additionally included revascularization, heart failure, and resuscitated cardiac arrest. The median follow-up was 5.6 years.
    RESULTS: The overall mean low-density lipoprotein cholesterol level was 26.5% lower in the rosuvastatin group than in the placebo group. The first coprimary outcome occurred in 235 participants (3.7%) in the rosuvastatin group and in 304 participants (4.8%) in the placebo group (hazard ratio, 0.76; 95% confidence interval [CI], 0.64 to 0.91; P=0.002). The results for the second coprimary outcome were consistent with the results for the first (occurring in 277 participants [4.4%] in the rosuvastatin group and in 363 participants [5.7%] in the placebo group; hazard ratio, 0.75; 95% CI, 0.64 to 0.88; P<0.001). The results were also consistent in subgroups defined according to cardiovascular risk at baseline, lipid level, C-reactive protein level, blood pressure, and race or ethnic group. In the rosuvastatin group, there was no excess of diabetes or cancers, but there was an excess of cataract surgery (in 3.8% of the participants, vs. 3.1% in the placebo group; P=0.02) and muscle symptoms (in 5.8% of the participants, vs. 4.7% in the placebo group; P=0.005).
    CONCLUSIONS: Treatment with rosuvastatin at a dose of 10 mg per day resulted in a significantly lower risk of cardiovascular events than placebo in an intermediate-risk, ethnically diverse population without cardiovascular disease. (Funded by the Canadian Institutes of Health Research and AstraZeneca; HOPE-3 ClinicalTrials.gov number, NCT00468923.).
    Note: Malaysia is a study site (Author: Yusoff K)
    MeSH terms: Rosuvastatin Calcium/administration & dosage*; Rosuvastatin Calcium/adverse effects; Aged; Cardiovascular Diseases/ethnology; Cardiovascular Diseases/mortality; Cardiovascular Diseases/prevention & control*; Double-Blind Method; Female; Humans; Hypercholesterolemia/drug therapy*; Cholesterol, LDL/blood; Male; Middle Aged; Risk Factors; Hydroxymethylglutaryl-CoA Reductase Inhibitors/administration & dosage*; Hydroxymethylglutaryl-CoA Reductase Inhibitors/adverse effects; Medication Adherence
  10. Mohd Aluwi MF, Rullah K, Yamin BM, Leong SW, Abdul Bahari MN, Lim SJ, et al.
    Bioorg Med Chem Lett, 2016 05 15;26(10):2531-8.
    PMID: 27040659 DOI: 10.1016/j.bmcl.2016.03.092
    The syntheses and bioactivities of symmetrical curcumin and its analogues have been the subject of interest by many medicinal chemists and pharmacologists over the years. To improve our understanding, we have synthesized a series of unsymmetrical monocarbonyl curcumin analogues and evaluated their effects on prostaglandin E2 production in lipopolysaccharide-induced RAW264.7 and U937 cells. Initially, compounds 8b and 8c exhibited strong inhibition on the production of PGE2 in both LPS-stimulated RAW264.7 (8b, IC50=12.01μM and 8c, IC50=4.86μM) and U937 (8b, IC50=3.44μM and 8c, IC50=1.65μM) cells. Placing vanillin at position Ar2 further improved the potency when both compounds 15a and 15b significantly lowered the PGE2 secretion level (RAW264.7: 15a, IC50=0.78μM and 15b, IC50=1.9μM while U937: 15a, IC50=0.95μM and 15b, IC50=0.92μM). Further experiment showed that compounds 8b, 8c, 15a and 15b did not target the activity of downstream inflammatory COX-2 mediator. Finally, docking simulation on protein targets COX-2, IKK-β, ERK, JNK2, p38α and p38β were performed using the conformation of 15a determined by single-crystal XRD.
    MeSH terms: Animals; Anti-Inflammatory Agents, Non-Steroidal/chemical synthesis; Anti-Inflammatory Agents, Non-Steroidal/pharmacology; Anti-Inflammatory Agents, Non-Steroidal/chemistry; Cell Line; Curcumin/analogs & derivatives*; Curcumin/chemistry; Humans; Lipopolysaccharides/pharmacology*; Macrophages/drug effects*; Macrophages/metabolism; Dinoprostone/antagonists & inhibitors; Dinoprostone/metabolism*; Crystallography, X-Ray; Inhibitory Concentration 50; Mitogen-Activated Protein Kinase 9/metabolism; Mitogen-Activated Protein Kinase 9/chemistry; Mice; Cyclooxygenase 2/metabolism; Cyclooxygenase 2/chemistry; I-kappa B Kinase/metabolism; I-kappa B Kinase/chemistry; Cyclooxygenase 2 Inhibitors/chemical synthesis; Cyclooxygenase 2 Inhibitors/pharmacology; Cyclooxygenase 2 Inhibitors/chemistry; Chemistry Techniques, Synthetic; Molecular Docking Simulation
  11. Flaherty G, O'Connor R, Johnston N
    Travel Med Infect Dis, 2016 May-Jun;14(3):200-11.
    PMID: 27040934 DOI: 10.1016/j.tmaid.2016.03.015
    High altitude training is regarded as an integral component of modern athletic preparation, especially for endurance sports such as middle and long distance running. It has rapidly achieved popularity among elite endurance athletes and their coaches. Increased hypoxic stress at altitude facilitates key physiological adaptations within the athlete, which in turn may lead to improvements in sea-level athletic performance. Despite much research in this area to date, the exact mechanisms which underlie such improvements remain to be fully elucidated. This review describes the current understanding of physiological adaptation to high altitude training and its implications for athletic performance. It also discusses the rationale and main effects of different training models currently employed to maximise performance. Athletes who travel to altitude for training purposes are at risk of suffering the detrimental effects of altitude. Altitude illness, weight loss, immune suppression and sleep disturbance may serve to limit athletic performance. This review provides an overview of potential problems which an athlete may experience at altitude, and offers specific training recommendations so that these detrimental effects are minimised.
    MeSH terms: Acclimatization*; Altitude*; Altitude Sickness/physiopathology; Anoxia/physiopathology; Humans; Athletes*; Travel Medicine
  12. Kazemi M, Karim R, Mirhosseini H, Abdul Hamid A
    Food Chem, 2016 Sep 1;206:156-66.
    PMID: 27041311 DOI: 10.1016/j.foodchem.2016.03.017
    Pomegranate peel is a rich source of phenolic compounds (such as punicalagin and hydroxybenzoic acids). However, the content of such bioactive compounds in the peel extract can be affected by extraction type and condition. It was hypothesized that the optimization of a pulsed ultrasound-assisted extraction (PUAE) technique could result in the pomegranate peel extract with higher yield and antioxidant activity. The main goal was to optimize PUAE condition resulting in the highest yield and antioxidant activity as well as the highest contents of punicalagin and hydroxybenzoic acids. The operation at the intensity level of 105W/cm(2) and duty cycle of 50% for a short time (10min) had a high efficiency for extraction of phenolics from pomegranate peel. The application of such short extraction can save the energy and cost of the production. Punicalagin and ellagic acid were the most predominant phenolic compounds quantified in the pomegranate peel extract (PPE) from Malas variety. PPE contained a minor content of gallic acid.
  13. Abdul Karim A, Azlan A, Ismail A, Hashim P, Abd Gani SS, Zainudin BH, et al.
    J Cosmet Dermatol, 2016 Sep;15(3):283-95.
    PMID: 27041391 DOI: 10.1111/jocd.12218
    OBJECTIVE: Cocoa pods are abundant waste materials of cocoa plantation, which are usually discarded onto plantation floors. However, due to poor plantation management, the discarded cocoa pods can create suitable breeding ground for Phytophthora palmivora, which is regarded as the causal agent of the black pod disease. On the other hand, cocoa pods potentially contain antioxidant compounds. Antioxidant compounds are related to the protection of skin from wrinkles and can be used as functional cosmetic ingredients. Therefore, in this study, cocoa pods were extracted and to be used as active ingredients for antiwrinkles.

    METHODS: The active compounds in cocoa pod extracts (CPE) were screened using liquid chromatography-mass spectrometry (LC-MS). Fibroblast cells were used to determine the effective concentration of CPE to maintain the viability for at least 50% of the cells (EC50 ). The gel was tested by 12 panelists to determine the efficacy of CPE in gel form using Visioscan to reduce skin wrinkles and improve skin condition.

    RESULTS: CPE was detected to contain malic acid, procyanidin B1, rosmarinic acid, procyanidin C1, apigenin, and ellagic acid, all of which may contribute to functional cosmetic properties of CPE. The EC50 value of cocoa pod extracts was used to calculate the amount of CPE to be incorporated into gel so that the formulated product could reach an effective concentration of extract while being nonintoxicant to the skin cell. The results showed that CPE is potential ingredient to reduce wrinkles. Skin wrinkles reduced at 6.38 ± 1.23% with the application of the CPE gel within 3 weeks and significantly improved further (12.39 ± 1.59%) after 5 weeks. The skin hydration increased (3.181 ± 1.06%) after 3 weeks of the CPE gel application.

    CONCLUSION: Flavonoid compounds in CPE contributed to the functional cosmetic properties of CPE. The CPE which is nontoxic to skin cells help to reduce wrinkles on skin after 3 weeks of application. CPE can be used as the active ingredients in antiwrinkle products, and prolonged application may result in significant visual changes to the naked eyes.

    MeSH terms: Adult; Cacao*; Cell Survival/drug effects; Cells, Cultured; Female; Fibroblasts; Fruit; Gels; Humans; Phytotherapy*; Middle Aged; Plant Extracts/pharmacology*; Plant Extracts/chemistry*; Skin/drug effects*; Skin Aging/drug effects*
  14. Lonn EM, Bosch J, López-Jaramillo P, Zhu J, Liu L, Pais P, et al.
    N Engl J Med, 2016 May 26;374(21):2009-20.
    PMID: 27041480 DOI: 10.1056/NEJMoa1600175
    BACKGROUND: Antihypertensive therapy reduces the risk of cardiovascular events among high-risk persons and among those with a systolic blood pressure of 160 mm Hg or higher, but its role in persons at intermediate risk and with lower blood pressure is unclear.
    METHODS: In one comparison from a 2-by-2 factorial trial, we randomly assigned 12,705 participants at intermediate risk who did not have cardiovascular disease to receive either candesartan at a dose of 16 mg per day plus hydrochlorothiazide at a dose of 12.5 mg per day or placebo. The first coprimary outcome was the composite of death from cardiovascular causes, nonfatal myocardial infarction, or nonfatal stroke; the second coprimary outcome additionally included resuscitated cardiac arrest, heart failure, and revascularization. The median follow-up was 5.6 years.
    RESULTS: The mean blood pressure of the participants at baseline was 138.1/81.9 mm Hg; the decrease in blood pressure was 6.0/3.0 mm Hg greater in the active-treatment group than in the placebo group. The first coprimary outcome occurred in 260 participants (4.1%) in the active-treatment group and in 279 (4.4%) in the placebo group (hazard ratio, 0.93; 95% confidence interval [CI], 0.79 to 1.10; P=0.40); the second coprimary outcome occurred in 312 participants (4.9%) and 328 participants (5.2%), respectively (hazard ratio, 0.95; 95% CI, 0.81 to 1.11; P=0.51). In one of the three prespecified hypothesis-based subgroups, participants in the subgroup for the upper third of systolic blood pressure (>143.5 mm Hg) who were in the active-treatment group had significantly lower rates of the first and second coprimary outcomes than those in the placebo group; effects were neutral in the middle and lower thirds (P=0.02 and P=0.009, respectively, for trend in the two outcomes).
    CONCLUSIONS: Therapy with candesartan at a dose of 16 mg per day plus hydrochlorothiazide at a dose of 12.5 mg per day was not associated with a lower rate of major cardiovascular events than placebo among persons at intermediate risk who did not have cardiovascular disease. (Funded by the Canadian Institutes of Health Research and AstraZeneca; ClinicalTrials.gov number, NCT00468923.).
    Note: Malaysia is a study site (Author: Yusoff K)
    MeSH terms: Aged; Antihypertensive Agents/administration & dosage*; Antihypertensive Agents/adverse effects; Benzimidazoles/administration & dosage*; Blood Pressure; Cardiovascular Diseases/mortality; Cardiovascular Diseases/epidemiology; Cardiovascular Diseases/prevention & control*; Double-Blind Method; Drug Therapy, Combination; Female; Humans; Hydrochlorothiazide/administration & dosage*; Hypertension/drug therapy*; Hypotension/chemically induced; Male; Middle Aged; Risk Factors; Tetrazoles/administration & dosage*; Incidence; Kaplan-Meier Estimate
  15. Ahmad Kurnin NA, Shah Ismail MH, Yoshida H, Izhar S
    J Oleo Sci, 2016;65(4):283-9.
    PMID: 27041513 DOI: 10.5650/jos.ess15209
    Oil palm empty fruit bunch (EFB) is one of the solid wastes produced in huge volume by palm oil mill. Whilst it still contains valuable oil, approximately 22.6 million tons is generated annually and treated as solid waste. In this work, sub-critical water (sub-cw) was used to extract oil, sugar and tar from spikelet of EFB. The spikelet was treated with sub-cw between 180-280°C and a reaction time of 2 and 5 minutes. The highest yield of oil was 0.075 g-oil/g-dry EFB, obtained at 240°C and reaction time of 5 minutes. Astonishingly, oil that was extracted through this method was 84.5% of that obtained through Soxhlet method using hexane. Yield of oil extracted was strongly affected by the reaction temperature and time. Higher reaction temperature induces the dielectric constant of water towards the non-polar properties of solvent; thus increases the oil extraction capability. Meanwhile, the highest yield of sugar was 0.20 g-sugar/g-dry EFB obtained at 220°C. At this temperature, the ion product of water is high enough to enable maximum sub-critical water hydrolysis reaction. This study showed that oil and other valuable material can be recovered using water at sub-critical condition, and most attractive without the use of harmful organic solvent.
  16. Kamari A, Aljafree NF, Yusoff SN
    Int J Biol Macromol, 2016 Jul;88:263-72.
    PMID: 27041651 DOI: 10.1016/j.ijbiomac.2016.03.071
    In this study, an amphiphilic chitosan derivative namely N,N-dimethylhexadecyl carboxymethyl chitosan (DCMC) was synthesised and applied for the first time as a carrier agent for rotenone. The physical and chemical properties of DCMC were characterised by using Fourier Transform Infrared Spectrometer (FTIR), Proton Nuclear Magnetic Resonance Spectrometer ((1)H NMR), CHN-O Elemental Analyser, Thermogravimetric Analyser (TGA) and Differential Scanning Calorimeter (DSC). DCMC was soluble in acidic (except pH 4), neutral and basic media with percent of transmittance (%T) values ranged from 67.2 to 99.4%. The critical micelle concentration (CMC) was determined as 0.095mg/mL. Transmission Electron Microscopy (TEM) analysis confirmed that DCMC has formed self-aggregates and exhibited spherical shape with the size of 65.5-137.0nm. The encapsulation efficiency (EE) and loading capacity (LC) of DCMC micelles with different weight ratios (DCMC:rotenone; 5:1, 50:1 and 100:1) were determined by using High Performance Liquid Chromatography (HPLC). The weight ratio of 100:1 gave the best EE with the value of more than 95.0%. DCMC micelles performed an excellent ability to control the release of rotenone, of which 99.0% of rotenone was released within 48h. Overall, DCMC has several key features to be an effective carrier agent for pesticide formulations.
    MeSH terms: Calorimetry, Differential Scanning; Chromatography, High Pressure Liquid; Drug Compounding; Fourier Analysis; Hydrogen-Ion Concentration; Magnetic Resonance Imaging; Micelles; Pesticides; Protons; Rotenone; Spectroscopy, Fourier Transform Infrared; Microscopy, Electron, Transmission; Chitosan; Proton Magnetic Resonance Spectroscopy
  17. Narayanaswamy R, Isha A, Wai LK, Ismail IS
    Pharmacogn Mag, 2016 Jan;12(Suppl 1):S21-6.
    PMID: 27041853 DOI: 10.4103/0973-1296.176111
    Clinacanthus nutans (Burm. f.) Lindau has gained popularity among Malaysians as a traditional plant for anti-inflammatory activity.
  18. Wahyuni FS, Shaari K, Stanslas J, Lajis NH, Hamidi D
    Pharmacogn Mag, 2016 Jan;12(Suppl 1):S52-6.
    PMID: 27041859 DOI: 10.4103/0973-1296.176115
    To isolate compounds from the roots of Garcinia cowa and to evaluated their cytotoxic activity against breast (MCF-7), prostate (DU-145), and lung (H-460) cell lines.
  19. Wan Nor Hafiza WA, Yazan LS, Tor YS, Foo JB, Armania N, Rahman HS
    Pharmacogn Mag, 2016 Jan;12(Suppl 1):S86-95.
    PMID: 27041866 DOI: 10.4103/0973-1296.176107
    Ethyl acetate and dichloromethane extract of Dillenia suffruticosa (EADS and DCMDS, respectively) can be a potential anticancer agent. The effects of EADS and DCMDS on the growth of HeLa cervical cancer cells and the expression of apoptotic-related proteins had been investigated in vitro. Cytotoxicity of the extracts toward the cells was determined by 5-diphenyltetrazolium bromide assay, the effects on cell cycle progression and the mode of cell death were analyzed by flow cytometry technique, while the effects on apoptotic-related genes and proteins were evaluated by quantitative real-time polymerase chain reaction, and Western blot and enzyme-linked immunosorbent assay, respectively. Treatment with DCMDS inhibited (P < 0.05) proliferation and induced apoptosis in HeLa cells. The expression of cyclin B1 was downregulated that led to G2/M arrest in the cells after treatment with DCMDA. In summary, DCMDS induced apoptosis in HeLa cells via endoplasmic reticulum stress-induced apoptotic pathway and dysregulation of mitochondria. The data suggest the potential application of DCMDS in the treatment of cervical cancer.
External Links