Displaying all 14 publications

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  1. Wei TM, Omar MS
    Malays Fam Physician, 2017;12(3):8-17.
    PMID: 29527274 MyJurnal
    Introduction: The prevalence of hypertension in Malaysia is increasing and an effective management of hypertension is important to reduce cardiovascular morbidity and mortality.

    Objective: To determine the knowledge, awareness and perception towards hypertension among residents in nursing homes as well as the roles of caregivers in hypertension management.

    Methods: A face-to-face survey with 200 hypertensive residents and 30 caregivers from 24 nursing homes in Kuala Lumpur and Selangor, Malaysia was conducted.

    Results: Of all the hypertensive residents, 90.5% (n= 181) knew that lowering their blood pressure could improve their health. Most residents strongly believed that taking antihypertensive drugs is important for keeping their high blood pressure under control (n= 162, 81%). Taking medication was perceived as the most important factor in controlling the high blood pressure (58%,n= 116) compared to lifestyle or diet modification. The majority of the caregivers reported that they played a major role in managing hypertension, especially with regards to medication-taking. task (66.7%,n= 20).

    Conclusion: The knowledge, attitude and perceptions of hypertension play a relatively major role in the self-management of hypertension. The role of caregivers also needed to be recognised in managing hypertension in nursing homes.

  2. Shan GW, Makmor-Bakry M, Omar MS
    Psychiatr Danub, 2016 Jun;28(2):146-53.
    PMID: 27287789
    Lithium has been the gold standard in treating bipolar disorder. In recent years, the use of lithium seems to be diminished although it is well tolerated among the bipolar disorder patients.
  3. Omar MS, Damanhuri NS, Kumolosasi E
    Turk J Gastroenterol, 2017 Jan;28(1):53-59.
    PMID: 27991853 DOI: 10.5152/tjg.2016.0409
    BACKGROUND/AIMS: Helicobacter pylori is a carcinogenic bacterium that could induce P-glycoprotein expression in the human gastrointestinal tract. Bacterial adherence to the gastrointestinal cell lines could be influenced by the level of P-glycoprotein. This study aimed to determine the influence of proton pump inhibitors that exhibit an inhibitory effect on P-glycoprotein in gastrointestinal carcinoma cell lines, namely Caco-2 and LS174T, in relation to H. pylori adherence.

    MATERIALS AND METHODS: Caco-2 and LS174T cells lines treated with omeprazole and esomeprazole were used in this study to assess the bacterial attachment of H. pylori within certain incubation periods.

    RESULTS: The presence of proton pump inhibitors increased the H. pylori adherence in a time-dependent manner in both Caco-2 and LS174T cell lines. The double inhibition of P-glycoprotein using proton pump inhibitor and P-glycoprotein inhibitor caused low P-glycoprotein expression in the cell lines, resulting in higher H. pylori adherence compared to the control cell lines.

    CONCLUSION: Proton pump inhibitors may alter P-glycoprotein expression in the gastrointestinal tract, and subsequently H. pylori adherence on the cell lines, and may contribute to resistance to drug therapy.

  4. Omar MS, Ariandi AH, Tohit NM
    J Res Pharm Pract, 2019 10 16;8(3):105-111.
    PMID: 31728340 DOI: 10.4103/jrpp.JRPP_19_35
    Objective: This study aimed to investigate the prevalence of practical problems with medications use experienced by elderly patients and the management strategy employed to overcome the problems. This study also aimed to evaluate the belief and attitude of elderly patients toward deprescribing.

    Methods: A cross-sectional study was conducted among elderly patients that seeking treatment in a primary care clinic in Malaysia from September to November 2018 using a set of researcher-assisted and validated questionnaire on their consent.

    Findings: A total of 182 elderly patients were included in this study. A majority of participants (n = 87, 47.8%) admitted experiencing practical problems with their medication use. There are varieties of choice of management strategy employed by elderly patients to overcome the problems. For the willingness to deprescribing, there were positive correlation for patients' age (rs (182) =0.183, P < 0.05) and number of medications (rs (182) =0.271, P < 0.01) with the burden factor. There were also a negative correlation of age (rs (182) = -0.174, P < 0.05) and number of medication (rs (182) = -0.176, P < 0.04) with appropriateness of medications.

    Conclusion: A majority of Malaysian elderly experience practical problems with their medication use. Elderly patients' belief and attitudes toward deprescribing were influenced by age and number of medications.

  5. Poh WY, Omar MS, Tan HP
    Ann Saudi Med, 2018 8 6;38(4):269-276.
    PMID: 30078025 DOI: 10.5144/0256-4947.2018.269
    BACKGROUND: Contrast-induced acute kidney injury (CI-AKI) is rec.ognized as a common complication of radiographic contrast-enhanced procedures. N-acetylcysteine (NAC) is commonly prescribed, but CI-AKI can still develop despite NAC administration as prophylaxis.

    OBJECTIVE: Identify the predictive factors for development of CI-AKI in patients prescribed NAC.

    DESIGN: Prospective, cross-sectional.

    SETTING: A tertiary hospital in Malaysia.

    PATIENTS AND METHODS: All adult patients who were prescribed NAC for prevention of CI-AKI were identified through an NAC drug us.age monitoring card maintained by the inpatient pharmacy. The study was conducted from March to July 2017.

    MAIN OUTCOME MEASURES: Statistically significant predictive fac.tors for development of CI-AKI despite NAC administration.

    SAMPLE SIZE: 152 RESULTS: The most commonly recognized risk factors for CI-AKI present in the study population were renal impairment (n=131, 86.2%), anemia (n=107, 70.4%), and diabetes mellitus (n=90, 59.2%). Hydration therapy was initiated in 128 patients (84.2%) prior to the contrast-enhanced procedure. Sixty-one (40.1%) were treated with nephrotoxic medications concomitantly with NAC. Fifteen (9.9%) patients developed AKI. Hypotension (OR: 6.02; 95% CI 1.25-28.97) and use of high contrast volume (OR: 6.56; 95% CI: 1.41-30.64) significantly increased the odds for AKI. Prior hydration therapy (OR: 0.13; 95% CI 0.03-0.59) showed protective effects.

    CONCLUSION: The risk predictors identified for CI-AKI were hypotension, high contrast volume and prior hydration therapy.

    LIMITATION: May not have identified other confounding factors for development of CI-AKI.

    CONFLICT OF INTEREST: None.

  6. Mohd-Zulkefli SZ, Omar MS, Md-Redzuan A
    Patient Prefer Adherence, 2016;10:1631-7.
    PMID: 27601888 DOI: 10.2147/PPA.S110419
    The incidence of acute coronary syndrome (ACS), one of the most common cardiovascular diseases, is high. Lipid goal attainment is one of the important factors to reduce the risk of recurrent heart attack. Identification of factors influencing lipid goal attainment such as age, female, race, underlying comorbidities, intensity of lipid-lowering therapy, patients' knowledge, and patients' belief about medicine would be beneficial in achieving the lipid goal. This study is aimed to determine lipid profile attainment and prescribing pattern of lipid-lowering therapy as well as to identify factors influencing lipid profile attainment among ACS patients.
  7. Ahmad Nizaruddin M, Omar MS, Mhd-Ali A, Makmor-Bakry M
    Patient Prefer Adherence, 2017;11:1869-1877.
    PMID: 29138540 DOI: 10.2147/PPA.S144513
    Background: Globally, the population of older people is on the rise. As families are burdened with the high cost of care for aging members, demand is increasing for medical care and nursing homes. Thus, medication management is crucial to ensure that residents in a care center benefit and assist the management of the care center in reducing the burden of health care. This study is aimed to qualitatively explore issues related to medication management in residential aged care facilities (RACFs).

    Participants and methods: A total of 11 stakeholders comprising health care providers, administrators, caretakers and residents were recruited from a list of registered government, nongovernmental organization and private RACFs in Malaysia from September 2016 to April 2017. An exploratory qualitative study adhering to Consolidated Criteria for Reporting Qualitative Studies was conducted. In-depth interview was conducted with consent of all participants, and the interviews were audio recorded for later verbatim transcription. Observational analysis was also conducted in a noninterfering manner.

    Results and discussion: Three themes, namely medication use process, personnel handling medications and culture, emerged in this study. Medication use process highlighted an unclaimed liability for residents' medication by the RACFs, whereas personnel handling medications were found to lack sufficient training in medication management. Culture of the organization did affect the medication safety and quality improvement. The empowerment of the residents in their medication management was limited. There were unclear roles and responsibility of who manages the medication in the nongovernment-funded RACFs, although they were well structured in the private nursing homes.

    Conclusion: There are important issues related to medication management in RACFs which require a need to establish policy and guidelines.

  8. Abubakar BM, Salleh FM, Shamsir Omar MS, Wagiran A
    Pharm Biol, 2018 Dec;56(1):368-377.
    PMID: 30058427 DOI: 10.1080/13880209.2018.1479869
    CONTEXT: Eurycoma longifolia Jack (Simaroubaceae) commonly known as Tongkat Ali is one of the most important plants in Malaysia. The plant extracts (particularly roots) are widely used for the treatment of cough and fever besides having antimalarial, antidiabetic, anticancer and aphrodisiac activities.

    OBJECTIVES: This study assesses the extent of adulteration of E. longifolia herbal medicinal products (HMPs) using DNA barcoding validated by HPLC analysis.

    MATERIALS AND METHODS: Chloroplastic rbcL and nuclear ITS2 barcode regions were used in the present study. The sequences generated from E. longifolia HMPs were compared to sequences in the GenBank using MEGABLAST to verify their taxonomic identity. These results were verified by neighbor-joining tree analysis in which branches of unknown specimen are compared to the reference sequences established from this study and other retrieved from the GenBank. The HMPs were also analysed using HPLC analysis for the presence of eurycomanone bioactive marker.

    RESULTS: Identification using DNA barcoding revealed that 37% of the tested HMPs were authentic while 27% were adulterated with the ITS2 barcode region proven to be the ideal marker. The validation of the authenticity using HPLC analysis showed a situation in which a species which was identified as authentic was found not to contain the expected chemical compound.

    DISCUSSION AND CONCLUSIONS: DNA barcoding should be used as the first screening step for testing of HMPs raw materials. However, integration of DNA barcoding with HPLC analysis will help to provide detailed knowledge about the safety and efficacy of the HMPs.

  9. Mohammed Abubakar B, Mohd Salleh F, Shamsir Omar MS, Wagiran A
    PMID: 28536641 DOI: 10.1155/2017/1352948
    In the last two decades, there has been a tremendous increase in the global use of herbal medicinal products (HMPs) due to their claimed health benefits. This has led to increase in their demand and consequently, also, resulted in massive adulteration. This is due to the fact that most of the traditional methods cannot identify closely related species in a process product form. Therefore the urgent need for simple and rapid identification methods resulted in the discovery of a novel technique. DNA barcoding is a process that uses short DNA sequence from the standard genome for species identification. This technique is reliable and is not affected by external factors such as climates, age, or plant part. The difficulties in isolation of DNA of high quality in addition to other factors are among the challenges encountered using the DNA barcoding in the authentication of HMP. These limitations indicated that using DNA barcoding alone may ineffectively authenticate the HMP. Therefore, the combination of DNA barcoding with chromatographic fingerprint, a popular and generally accepted technique for the assessment and quality control of HMP, will offer an efficient solution to effectively evaluate the authenticity and quality consistency of HMP. Detailed and quality information about the main composition of the HMPs will help to ascertain their efficacy and safety as these are very important for quality control.
  10. Hamid AA, Hamid TH, Wahab RA, Omar MS, Huyop F
    PLoS One, 2015;10(3):e0121687.
    PMID: 25816329 DOI: 10.1371/journal.pone.0121687
    The non-stereospecific α-haloalkanoic acid dehalogenase E (DehE) degrades many halogenated compounds but is ineffective against β-halogenated compounds such as 3-chloropropionic acid (3CP). Using molecular dynamics (MD) simulations and site-directed mutagenesis we show here that introducing the mutation S188V into DehE improves substrate specificity towards 3CP. MD simulations showed that residues W34, F37, and S188 of DehE were crucial for substrate binding. DehE showed strong binding ability for D-2-chloropropionic acid (D-2CP) and L-2-chloropropionic acid (L-2CP) but less affinity for 3CP. This reduced affinity was attributed to weak hydrogen bonding between 3CP and residue S188, as the carboxylate of 3CP forms rapidly interconverting hydrogen bonds with the backbone amide and side chain hydroxyl group of S188. By replacing S188 with a valine residue, we reduced the inter-molecular distance and stabilised bonding of the carboxylate of 3CP to hydrogens of the substrate-binding residues. Therefore, the S188V can act on 3CP, although its affinity is less strong than for D-2CP and L-2CP as assessed by Km. This successful alteration of DehE substrate specificity may promote the application of protein engineering strategies to other dehalogenases, thereby generating valuable tools for future bioremediation technologies.
  11. Abd Aziz ZH, Katas H, Omar MS, Mohamed Shah N, Yusop SM
    Dysphagia, 2021 Sep 13.
    PMID: 34518932 DOI: 10.1007/s00455-021-10365-6
    Dysphagia is associated with increased dependency and treatment costs, whereby patients resort to extemporaneous compounding that may further increase the number of adverse events and medical errors. In the management of dysphagia, increasing the bolus viscosity of medication such as fluid gels can be practiced. This study aimed to prepare and characterize the fluid gels as well as to estimate the cost of using fluid gels and compare it to the conventional practice of extemporaneous preparation of thickened liquid. Fluid gels were formulated using gellan gum and determined for physicochemical characteristics and in vitro drug release profile. The cost-based price of the fluid gel was estimated and compared to the cost of administering standard medication as well as administering thickened liquid using thickening powder. Fluid gels exhibited good physicochemical properties with the viscosity within nectar and honey consistency. A similar dissolution profile to the reference was observed for the 0.5% w/v gellan gum fluid gel and exhibiting the Higuchi release model. The price for 100 mL unit of 50 mg/mL paracetamol/acetaminophen and 20 mg/mL ibuprofen fluid gel was estimated to be about USD2.30 and USD2.37, respectively. A dose of 1000 mg paracetamol and 400 mg ibuprofen fluid gel was estimated to be about USD0.46 and USD0.47, respectively, which is lower than the cost of administering the same dose using extemporaneous thickened liquid. Fluid gels could be a cost-effective formulation for delivering medication in patients with dysphagia and can be developed on a profitable scale.
  12. Satiamurthy R, Yaakob NS, Shah NM, Azmi N, Omar MS
    Curr Mol Med, 2023;23(4):341-349.
    PMID: 35549869 DOI: 10.2174/1566524022666220512122525
    5-HT3 receptor antagonists corresponding to ondansetron, granisetron, tropisetron, and palonosetron are clinically accustomed to treating nausea and emesis in chemotherapy patients. However, current and previous studies reveal novel potentials of those ligands in other diseases involving the nervous system, such as addiction, pruritus, and neurological disorders, such as anxiety, psychosis, nociception, and cognitive function. This review gathers existing studies to support the role of 5-HT3 receptors in CIPN modulation. It has been reported that chemotherapy drugs increase the 5-HT content that binds with the 5-HT3 receptor, which later induces pain. As also shown in pre-clinical and clinical studies that various neuropathic pains could be blocked by the 5-HT3 receptor antagonists, we proposed that 5-HT3 receptor antagonists via 5- HT3 receptors may also inhibit neuropathic pain induced by chemotherapy. Our review suggests that future studies focus more on the 5-HT3 receptor antagonists and their modulation in CIPN to reduce the gap in the current pharmacotherapy for cancer-related pain.
  13. Damanhuri NS, Kumolosasi E, Omar MS, Razak AFA, Mansor AH
    Daru, 2021 Jun;29(1):13-22.
    PMID: 33405191 DOI: 10.1007/s40199-020-00377-2
    BACKGROUND: P-glycoprotein (P-gp) is an Adenosine triphosphate (ATP) dependent drug-efflux pump which is located abundantly in the stomach and protects the gut mucosa from xenobiotic.

    OBJECTIVE: The purpose of this study was to investigate the influence of P-gp modulation on the efficacy of treatment regimen.

    METHOD: P-gp modulation in rats was performed by using P-gp inducer (150 mg/kg rifampicin) and P-gp inhibitor (10 mg/kg cyclosporine A) for 14 days prior to be infected with Helicobacter pylori (H. pylori). The rats were further divided into groups, which were normal control, vehicle control, antibiotics and omeprazole, antibiotics only and omeprazole only for another 2 weeks of treatment. The ulcer formation and P-gp expression were determined by using macroscopic evaluation and western blot analysis, respectively.

    RESULTS: The highest P-gp expression was shown in the induced P-gp rats (2.00 ± 0.68) while the lowest P-gp expression was shown in the inhibited P-gp rats (0.45 ± 0.36) compared to the normal P-gp rats. In all groups, the rats which were infected with H. pylori, had a significant increase (p 

  14. Mohammed HA, Sulaiman GM, Anwar SS, Tawfeeq AT, Khan RA, Mohammed SAA, et al.
    Nanomedicine (Lond), 2021 09;16(22):1937-1961.
    PMID: 34431317 DOI: 10.2217/nnm-2021-0070
    Aims: To evaluate the anti breast-cancer activity, biocompatibility and toxicity of poly(d,l)-lactic-co-glycolic acid (PLGA)-encapsulated quercetin nanoparticles (Q-PLGA-NPs). Materials & methods: Quercetin was nano-encapsulated by an emulsion-diffusion process, and the nanoparticles were fully characterized through Fourier transform infrared spectroscopy, x-ray diffractions, FESEM and zeta-sizer analysis. Activity against CAL51 and MCF7 cell lines were assessed by DNA fragmentation assays, fluorescence microscopy, and acridine-orange, and propidium-iodide double-stainings. Biocompatibility towards red blood cells and toxicity towards mice were also explored. Results: The Q-PLGA-NPs exhibited apoptotic activity against the cell lines. The murine in vivo studies showed no significant alterations in the liver and kidney's functional biomarkers, and no apparent abnormalities, or tissue damages were observed in the histological images of the liver, spleen, lungs, heart and kidneys. Conclusion: The study established the preliminary in vitro efficacy and in vivo safety of Q-PLGA-NPs as a potential anti-breast cancer formulation.
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