Displaying publications 21 - 40 of 48 in total

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  1. Marta H, Wijaya C, Sukri N, Cahyana Y, Mohammad M
    Polymers (Basel), 2022 Nov 12;14(22).
    PMID: 36433002 DOI: 10.3390/polym14224875
    Starch can be found in the stems, roots, fruits, and seeds of plants such as sweet potato, cassava, corn, potato, and many more. In addition to its original form, starch can be modified by reducing its size. Starch nanoparticles have a small size and large active surface area, making them suitable for use as fillers or as a reinforcing material in bioplastics. The aim of reinforcing material is to improve the characteristics of bioplastics. This literature study aims to provide in-depth information on the potential use of starch nanoparticles as a reinforcing material in bioplastic packaging. This study also reviews starch size reduction methods including acid hydrolysis, nanoprecipitation, milling, and others; characteristics of the nano-starch particle; and methods to produce bioplastic and its characteristics. The use of starch nanoparticles as a reinforcing material can increase tensile strength, reduce water vapor and oxygen permeability, and increase the biodegradability of bioplastics. However, the use of starch nanoparticles as a reinforcing material for bioplastic packaging still encounters obstacles in its commercialization efforts, due to high production costs and ineffectiveness.
  2. Hosseini S, Aeinehvand MM, Uddin SM, Benzina A, Rothan HA, Yusof R, et al.
    Sci Rep, 2015;5:16485.
    PMID: 26548806 DOI: 10.1038/srep16485
    The application of microfluidic devices in diagnostic systems is well-established in contemporary research. Large specific surface area of microspheres, on the other hand, has secured an important position for their use in bioanalytical assays. Herein, we report a combination of microspheres and microfluidic disk in a unique hybrid platform for highly sensitive and selective detection of dengue virus. Surface engineered polymethacrylate microspheres with carefully designed functional groups facilitate biorecognition in a multitude manner. In order to maximize the utility of the microspheres' specific surface area in biomolecular interaction, the microfluidic disk was equipped with a micromixing system. The mixing mechanism (microballoon mixing) enhances the number of molecular encounters between spheres and target analyte by accessing the entire sample volume more effectively, which subsequently results in signal amplification. Significant reduction of incubation time along with considerable lower detection limits were the prime motivations for the integration of microspheres inside the microfluidic disk. Lengthy incubations of routine analytical assays were reduced from 2 hours to 5 minutes while developed system successfully detected a few units of dengue virus. Obtained results make this hybrid microsphere-microfluidic approach to dengue detection a promising avenue for early detection of this fatal illness.
  3. Ali Khan MS, Ahmed N, Misbah, Arifuddin M, Zakaria ZA, Al-Sanea MM, et al.
    Food Chem Toxicol, 2018 May;115:523-531.
    PMID: 29555329 DOI: 10.1016/j.fct.2018.03.021
    In view of the report on anti-nociceptive activity of Leathery Murdah, Terminalia coriacea {Roxb.} Wight & Arn. (Combretaceae) leaves, the present study was conducted to isolate the active constituents and identify the underlying mechanisms. The methanolic extract of T. coriacea leaves (TCLME) at doses 125, 250 and 500 mg/kg orally, was subjected to various in-vivo assays in acetic acid induced writhing and formalin induced paw-licking tests with aspirin (100 mg/kg) and morphine (5 mg/kg) as reference drugs. Three flavonoids, rutin, robinin and gossypetin 3-glucuronide 8-glucoside were isolated and characterized from TCLME for the first time. The extract showed significant (p 
  4. Moustafa AA, Crouse JJ, Herzallah MM, Salama M, Mohamed W, Misiak B, et al.
    Psychol Rep, 2020 Oct;123(5):1501-1517.
    PMID: 31470771 DOI: 10.1177/0033294119872209
    Depression can occur due to common major life transitions, such as giving birth, menopause, retirement, empty-nest transition, and midlife crisis. Although some of these transitions are perceived as positive (e.g., giving birth), they may still lead to depression. We conducted a systematic literature review of the factors underlying the occurrence of depression following major life transition in some individuals. This review shows that major common life transitions can cause depression if they are sudden, major, and lead to loss (or change) of life roles (e.g., no longer doing motherly or fatherly chores after children leave family home). Accordingly, we provide a theoretical framework that explains depression caused by transitions in women. One of the most potential therapeutic methods of ameliorating depression associated with life transitions is either helping individuals accept their new roles (e.g., accepting new role as a mother to ameliorate postpartum depression symptoms) or providing them with novel life roles (e.g., volunteering after retirement or children leave family home) may help them overcome their illness.
  5. Matin MM, Nath AR, Saad O, Bhuiyan MM, Kadir FA, Abd Hamid SB, et al.
    Int J Mol Sci, 2016 Aug 27;17(9).
    PMID: 27618893 DOI: 10.3390/ijms17091412
    Benzyl α-l-rhamnopyranoside 4, obtained by both conventional and microwave assisted glycosidation techniques, was subjected to 2,3-O-isopropylidene protection to yield compound 5 which on benzoylation and subsequent deprotection of isopropylidene group gave the desired 4-O-benzoylrhamnopyranoside 7 in reasonable yield. Di-O-acetyl derivative of benzoate 7 was prepared to get newer rhamnopyranoside. The structure activity relationship (SAR) of the designed compounds was performed along with the prediction of activity spectra for substances (PASS) training set. Experimental studies based on antimicrobial activities verified the predictions obtained by the PASS software. Protected rhamnopyranosides 5 and 6 exhibited slight distortion from regular ¹C₄ conformation, probably due to the fusion of pyranose and isopropylidene ring. Synthesized rhamnopyranosides 4-8 were employed as test chemicals for in vitro antimicrobial evaluation against eight human pathogenic bacteria and two fungi. Antimicrobial and SAR study showed that the rhamnopyranosides were prone against fungal organisms as compared to that of the bacterial pathogens. Interestingly, PASS prediction of the rhamnopyranoside derivatives 4-8 were 0.49 < Pa < 0.60 (where Pa is probability 'to be active') as antibacterial and 0.65 < Pa < 0.73 as antifungal activities, which showed significant agreement with experimental data, suggesting rhamnopyranoside derivatives 4-8 were more active against pathogenic fungi as compared to human pathogenic bacteria thus, there is a more than 50% chance that the rhamnopyranoside derivative structures 4-8 have not been reported with antimicrobial activity, making it a possible valuable lead compound.
  6. Ibrahim MM, Al-Refai M, Al-Fawwaz A, Ali BF, Geyer A, Harms K, et al.
    J Fluoresc, 2018 Mar;28(2):655-662.
    PMID: 29680927 DOI: 10.1007/s10895-018-2227-2
    Furopyridine III, namely 1-(3-amino-4-(4-(tert-butyl)phenyl)-6-(p-tolyl)furo[2,3-b]pyridin-2-yl)ethan-1-one, synthesized from 4-(4-(tert-butyl)phenyl)-2-oxo-6-(p-tolyl)-1,2-dihydropyridine-3-carbonitrile I in two steps. The title compound is characterized by NMR, MS and its X-ray structure. The molecular structure consists of planar furopyridine ring with both phenyl rings being inclined from the furopyridine scaffold to a significant different extent. There are three intramolecular hydrogen bonds within the structure. The lattice is stabilized by N-H…O, H2C-H …π and π…π intermolecular interactions leading to three-dimensional network. Compound III exhibits fluorescent properties, which are investigated. Antimicrobial potential and antioxidant activity screening studies for the title compound III and the heterocyclic derivatives, I and II, show no activity towards neither bacterial nor fungal strains, while they exhibited weak to moderate antioxidant activity compared to reference.
  7. Akbarzadeh MM, Kzemin Jasemi N, Hedayati Katuli F, Dorostgu Z, Yazdani F, Dorostgu Z, et al.
    J Biomol Struct Dyn, 2016 Feb 29.
    PMID: 26923058
    Herein we have engineered a micellar Cu protoporphyrin catalyst that mediates carbon bond activation using peroxide as an electron source. Cu protoporphyrin is a biomimetic model of active site of chloroperoxidase enzyme, which catalyzes the carbon bond halogenation in the presence of a suitable amount of H2O2. The encapsulation of Cu(II) Protoporphyrin IX/L-Cysteine inside of cetyltrimethylammonium bromide micelle increases the rate of chlorination at pH 3. The cited catalyst resists high concentrations of hydrogen peroxide, which is previously reported as a suicide inactivator component of hemo-enzymes. Isothermal Titration Calorimetry (ITC) and Dynamic Light Scattering (DLS) data have revealed the formation of a micellar complex by encapsulation of six Cu(II) proporphyrins within each micelle. Moreover, electrochemical investigations indicate that L-Cysteine increases the intensity of electron transferred due to the formation of self-assembled monolayer on Au electrode. Our results paved a road toward the design of a more robust mimetic catalysis based on Protoporphyrin IX derivatives.
  8. Bukhari SNA, Alotaibi NH, Ahmad W, Alharbi KS, Abdelgawad MA, Al-Sanea MM, et al.
    Med Chem, 2020 Sep 05.
    PMID: 32888274 DOI: 10.2174/1573406416666200905125038
    BACKGROUND: Ligustrazine and chalcones have been reported previously for various biological activities including anticancer effects.

    OBJECTIVES: Based on the multitargeted biological activities approach of ligustrazine based chalcones, in current study 18 synthetic ligustrazine-containing α, β-unsaturated carbonyl-based 1, 3-Diphenyl-2-propen-1-one derivatives were evaluated for their inhibitory effects on growth of five different types of cancer cells.

    METHODS: All compounds were evaluated for anticancer effects on various cancer cell lines by propidium iodide fluorescence assay and various other assays were performed for mechanistic studies.

    RESULTS: Majority of compounds exhibited strong inhibition of cancer cells especially synthetic compounds 4a and 4b bearing 1-Pyridin-3-yl-ethanone as a ketone moiety in main structural backbone were found most powerful inhibitors of cancer cell growth. Most active 9 compounds among whole series were selected for further studies related to different cancer targets including EGFR TK kinases, tubulin polymerization, KAF and BRAFV600E.

    CONCLUSION: Synthetic derivatives including 4a-b and 5a-b showed multitarget approach and showed strong inhibitory effects on EGFR, FAK and BRAF while three compounds including 3e bearing methoxy substitution, 4a and 4b with 1- pyridin-3-yl-ethanone moiety showed the inhibition of tubulin polymerization.

  9. Al-Sanea MM, Ali Khan MS, Abdelazem AZ, Lee SH, Mok PL, Gamal M, et al.
    Molecules, 2018 Jan 31;23(2).
    PMID: 29385071 DOI: 10.3390/molecules23020297
    A new series of 1-phenyl-3-(4-(pyridin-3-yl)phenyl)urea derivatives were synthesized and subjected to in vitro antiproliferative screening against National Cancer Institute (NCI)-60 human cancer cell lines of nine different cancer types. Fourteen compounds 5a-n were synthesized with three different solvent exposure moieties (4-hydroxylmethylpiperidinyl and trimethoxyphenyloxy and 4-hydroxyethylpiperazine) attached to the core structure. Substituents with different π and σ values were added on the terminal phenyl group. Compounds 5a-e with a 4-hydroxymethylpiperidine moiety showed broad-spectrum antiproliferative activity with higher mean percentage inhibition values over the 60-cell line panel at 10 µM concentration. Compound 5a elicited lethal rather than inhibition effects on SK-MEL-5 melanoma cell line, 786-0, A498, RXF 393 renal cancer cell lines, and MDA-MB-468 breast cancer cell line. Two compounds, 5a and 5d showed promising mean growth inhibitions and thus were further tested at five-dose mode to determine median inhibitory concentration (IC50) values. The data revealed that urea compounds 5a and 5d are the most active derivatives, with significant efficacies and superior potencies than paclitaxel in 21 different cancer cell lines belonging particularly to renal cancer and melanoma cell lines. Moreover, 5a and 5d had superior potencies than gefitinib in 38 and 34 cancer cell lines, respectively, particularly colon cancer, breast cancer and melanoma cell lines.
  10. Muttaqillah NA, Abdul Wahab A, Ding CH, Mohammad M, Biswas S, Rahman MM
    EXCLI J, 2015;14:175-8.
    PMID: 26648811 DOI: 10.17179/excli2014-660
    Primary biliary cirrhosis in combination with autoimmune hepatitis has been termed "overlap syndrome", but its diagnosis is challenging. We report a case of a 43-year-old lady who presented with a six-month history of jaundice and pruritus. She subsequently developed gum bleeds. Laboratory investigations revealed hypochromic microcytic anemia, abnormal coagulation profiles, elevated serum alanine transferase and alkaline phosphatase levels, and raised serum IgG and IgM levels. Her serum was also positive for anti-nuclear and anti-mitochondrial antibodies. The findings from her abdominal CT scan were suggestive of early liver cirrhosis and the histopathological examination results of her liver biopsy were consistent with primary biliary cirrhosis. The patient was treated with ursodeoxycholic acid and her liver function test parameters normalized after six months.
  11. Mohammad M, Maitra S, Ahmad N, Bustam A, Sen TK, Dutta BK
    J Hazard Mater, 2010 Jul 15;179(1-3):363-72.
    PMID: 20362390 DOI: 10.1016/j.jhazmat.2010.03.014
    The potential of physic seed hull (PSH), Jantropha curcas L. as an adsorbent for the removal of Cd(2+) and Zn(2+) metal ions from aqueous solution has been investigated. It has been found that the amount of adsorption for both Cd(2+) and Zn(2+) increased with the increase in initial metal ions concentration, contact time, temperature, adsorbent dosage and the solution pH (in acidic range), but decreased with the increase in the particle size of the adsorbent. The adsorption process for both metal ions on PSH consists of three stages-a rapid initial adsorption followed by a period of slower uptake of metal ions and virtually no uptake at the final stage. The kinetics of metal ions adsorption on PSH followed a pseudo-second-order model. The adsorption equilibrium data were fitted in the three adsorption isotherms-Freundlich, Langmuir and Dubinin-Radushkevich isotherms. The data best fit in the Langmuir isotherm indication monolayer chemisorption of the metal ions. The adsorption capacity of PSH for both Zn(2+) and Cd(2+) was found to be comparable with other available adsorbents. About 36-47% of the adsorbed metal could be leached out of the loaded PSH using 0.1M HCl as the eluting medium.
  12. Wahab AA, Ali UK, Mohammad M, Md Monoto EM, Rahman MM
    Pak J Med Sci, 2015 4 17;31(1):217-9.
    PMID: 25878647 DOI: 10.12669/pjms.311.5932
    Syphilis in pregnancy remains an important medical condition due to its consequences. We present two cases of young pregnant women who were diagnosed syphilis during their antenatal visit. The first case was a 29-year-old Malay lady diagnosed with syphilis during the first trimester of pregnancy, while the second case was a 21-year-old Chinese lady diagnosed with syphilis during the third trimester of pregnancy. The diagnosis and management of the syphilis in pregnancy are discussed.
  13. Shriwas SR, Rahman Isa AB, Reddy SC, Mohammad M, Mohammad WBW, Mazlan M
    Med J Malaysia, 1996 Dec;51(4):447-52.
    PMID: 10968032
    Few attempts have been made to determine the risk factors for diabetic retinopathy which is a major cause of visual impairment and blindness. One hundred and forty patients of diabetes mellitus were studied to determine the prevalence and types of retinopathy, and its relation to various risk factors. Nearly half (48.6%) of the patients suffered from retinopathy. The significant associated risk factors were long duration of diabetes, proteinuria and elevated serum creatinine level. However, there was no significant association between the prevalence of retinopathy and high levels of serum cholesterol, C-peptide levels, associated hypertension, and glycaemic control of diabetes mellitus. An effective screening programme for detection of retinopathy in the patients of diabetes as a regular practice is encouraged.
    Study site: Diabetic clinic, Hospital Universiti Sains Malaysia (HUSM), Kelantan, Malaysia
  14. Yusof AM, Mohammad M, Abdullahi MA, Mohamed Z, Zakaria R, Wahab RA
    Trop Life Sci Res, 2017 Jan;28(1):23-32.
    PMID: 28228914 MyJurnal DOI: 10.21315/tlsr2017.28.1.2
    Intestinal parasitic infections are one of the most common causes of human diseases that result in serious health and economic issues in many developing and developed countries. Raw vegetables and fruits play an important role in transmitting parasites to humans. Hence, the aim of this study was to investigate the parasitological contamination of select commonly consumed local leafy vegetables and fruits in Kuantan, Malaysia. One kilogram of locally consumed raw vegetables and fruits were collected randomly from the Kuantan wet market (Pasar Tani) during the monsoon season (November 2014-January 2015) and the dry season (February 2015-April 2015). A standard wet mount procedure and modified Ziehl-Neelsen staining were used for the detection of parasites. In the present study, the examination of vegetables revealed five different parasite species. The vegetable samples collected from Kuantan's wet market were positive for both helminthes and protozoa. However, the fruits samples were negative for parasitic contamination. Pegaga was the most contaminated leafy vegetable in this study, and Strongyloides was the parasite found most frequently. Furthermore, there was a high diversity in the type of parasites observed during the dry season compared to the monsoon season. Therefore, further action should be taken to reduce the occurrence of parasitic contamination in vegetables by implementing the principles of good agricultural practice and improving water treatment efficacy.
  15. Asim N, Badiei M, Mohammad M, Razali H, Rajabi A, Chin Haw L, et al.
    PMID: 35055838 DOI: 10.3390/ijerph19021016
    Increasing demand on heating, ventilation, and air-conditioning (HVAC) systems and their importance, as the respiratory system of buildings, in developing and spreading various microbial contaminations and diseases with their huge global energy consumption share have forced researchers, industries, and policymakers to focus on improving the sustainability of HVAC systems. Understanding and considering various parameters related to the sustainability of new and existing HVAC systems as the respiratory system of buildings are vital to providing healthy, energy-efficient, and economical options for various building types. However, the greatest opportunities for improving the sustainability of HVAC systems exist at the design stage of new facilities and the retrofitting of existing equipment. Considering the high available percentage of existing HVAC systems globally reveals the importance of their retrofitting. The attempt has been made to gather all important parameters that affect decision-making to select the optimum HVAC system development considerations among the various opportunities that are available for sustainability improvement.
  16. Farghali MM, Alhadhoud FK, AlObaidly NH, Mohammad M, Abdelazim IA, Amanzholkyzy A, et al.
    Prz Menopauzalny, 2023 Sep;22(3):148-154.
    PMID: 37829263 DOI: 10.5114/pm.2023.131440
    INTRODUCTION: Obesity is the most common medical problem affecting reproductive-age women. To detect the prevalence of obesity, and bariatric surgeries (BSs) in reproductive-age women, and the impact of obesity vs. BSs on the subsequent pregnancy outcomes.

    MATERIAL AND METHODS: Obese-pregnant women, and women underwent BSs before the current pregnancy, with complete antenatal, and delivery records were included in the current study. Collected data were analyzed using MedCalc 20.106 to calculate the odd ratio (OR), and relative risk (RR) of adverse maternal, and fetal outcomes in relation to maternal obesity vs. BSs.

    RESULTS: Data of 14,474 pregnant women were collected during this study; 33.94% (4912/14474) of them were obese, and 3.8% (546/14474) of them had previous BSs before the current pregnancy. The obese group has significantly higher odds, and RR of gestational diabetes mellitus (GDM) [OR 1.9 (p = 0.0001), and RR 1.79 (p = 0.0001)], gestational hypertension [OR 1.7 (p = 0.0002), and RR 1.6 (p = 0.0003)], and preeclampsia (PE) [OR 1.7 (p = 0.0001), and RR 1.6 (p = 0.0001)] compared to BSs group. The obese group has also significantly higher odds, and RR of cesarean sections (CSs) [OR 1.3 (p = 0.008), and RR 1.25 (p = 0.01)], and large for gestational age [OR 1.39 (p = 0.01), and RR 1.3 (p = 0.02)] compared to BSs group.

    CONCLUSIONS: About 33.94% of the reproductive-age women in Kuwait are obese, and 3.8% of them had previous BSs. Obese-pregnant women are at increased risks of GDM, gestational hypertension, PE, and CSs. Bariatric surgeries reduced the rates of GDM, gestational hypertension, PE, and CSs significantly.

  17. Moustafa AA, Hassan M, Hewedi DH, Hewedi I, Garami JK, Al Ashwal H, et al.
    Rev Neurosci, 2018 09 25;29(7):815.
    PMID: 30179856 DOI: 10.1515/revneuro-2018-0081
  18. Abdelgawad MA, Musa A, Almalki AH, Alzarea SI, Mostafa EM, Hegazy MM, et al.
    Drug Des Devel Ther, 2021;15:2325-2337.
    PMID: 34103896 DOI: 10.2147/DDDT.S310820
    Introduction: Epidermal growth factor receptor (EGFR) inhibition is an imperative therapeutic approach targeting various types of cancer including colorectal, lung, breast, and pancreatic cancer types. Moreover, cyclooxygenase-2 (COX-2) is frequently overexpressed in different types of cancers and has a role in the promotion of malignancy, apoptosis inhibition, and metastasis of tumor cells. Combination therapy has been emerged to improve the therapeutic benefit against cancer and curb intrinsic and acquired resistance.

    Methods: Three semi-synthetic series of compounds (C1-4, P1-4, and G1-4) were prepared and evaluated biologically as potential dual epidermal growth factor receptor (EGFR) and COX-2 inhibitors. The main phenolic constituents of Amaranthus spinosus L. (p-coumaric, caffeic and gallic) acids have been isolated and subsequently subjected to diazo coupling with various amines to get novel three chemical scaffolds with potential anticancer activities.

    Results: Compounds C4 and G4 showed superior inhibitory activity against EGFR (IC50: 0.9 and 0.5 µM, respectively) and displayed good COX-2 inhibition (IC50: 4.35 and 2.47 µM, respectively). Moreover, the final compounds were further evaluated for their cytotoxic activity against human colon cancer (HT-29), pancreatic cancer (PaCa-2), human malignant melanoma (A375), lung cancer (H-460), and pancreatic ductal cancer (Panc-1) cell lines. Interestingly, compounds C4 and G4 exhibited the highest cytotoxic activity with average IC50 values of 1.5 µM and 2.8 µM against H-460 and Panc-1, respectively. The virtual docking study was conducted to gain proper understandings of the plausible-binding modes of target compounds within EGFR and COX-2 binding sites.

    Discussion: The NMR of prepared compounds showed characteristic peaks that confirmed the structure of the target compounds. The synthesized benzoxazolyl scaffold containing compounds showed inhibitory activities for both COXs and EGFR which are consistent with the virtual docking study.

  19. Mustafar RB, Mohd R, Miswan NA, Bain A, Cader R, Gafor AH, et al.
    Cent Eur J Immunol, 2014;39(2):236-42.
    PMID: 26155130 DOI: 10.5114/ceji.2014.43729
    Chronic kidney disease (CKD) patients' are at risk of low vitamin D and chronic inflammation. We studied the effect of 12 weeks calcitriol and calcium carbonate supplementation on inflammatory mediators serum; interleukin-6 (IL-6), interleukin-10 (IL-10) and highly sensitive C-reactive protein (hs-CRP).
  20. Menon BS, Juraida E, Alagaratnam J, Mohammad M, Ibrahim H, George TM, et al.
    J Pediatr Hematol Oncol, 2007 Jan;29(1):2-4.
    PMID: 17230058
    In the last decade, chemotherapy in combination with focal therapy (chemoreduction) has been increasingly used in intraocular retinoblastoma to avoid enucleation and radiotherapy. The aim of this study was to assess the feasibility and outcome of chemoreduction in Malaysian children with retinoblastoma. This was a prospective study from August 2001 to January 2006. Twenty children (25 eyes) were given 4 cycles of chemoreduction, after which the response was assessed. Fourteen eyes showed a complete response, 10 eyes showed a partial response, and 1 eye had progressive disease. Twelve eyes developed progressive disease later, 9 after an initial complete response and 3 after a partial response. Overall, progressive disease occurred in 52%. There were 2 treatment failures, in Reese-Elsworth groups 3 and 4. Both eyes required enucleation. One eye in group 5 required second line chemotherapy to achieve a complete response. No eyes were irradiated. Five children (25%) defaulted follow-up, one of whom returned with disseminated disease. In conclusion, 4 cycles of chemoreduction achieved a durable complete response in only 12% of eyes. Chemoreduction is feasible in Malaysia but requires good patient compliance and close follow-up.
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