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Articles by Mariana N. Shamsudin
Total Records ( 10 ) for Mariana N. Shamsudin
  Nagi A. Alhaj , Mariana N. Shamsudin , Hana F. Zamri and Rasedee Abdullah
  The antimicrobial activity of N. sativa essential oil obtained by supercritical fluid extraction by carbon dioxide was investigated against Gram Positive and Gram negative strains, isolated from clinical specimens. Best conditions for Black cumin oil extraction are obtained at 400 bar, 40°C and a solvent flow rate of 25 g min-1. The seed extracts were prepared by supercritical fluid extraction method. Filter paper discs impregnated with varying concentrations of N. sativa extract were tested by the disk diffusion method. Methicillin Resistant Staphylococcus Aureus (MRSA) ATCC strain (700968), E. coli ATCC strain (25922), E. coli 0157 ATCC strain (12799), Extended-Spectrum Beta-Lactamase (ESBL) Klebsiella pneumoniae ATCC strain (700603), Carbapenam Resistant acenitobacter Baumanii (CRAB) clinical strain and Vibrio cholerae 01 Ogawa and 0139 Bengal clinical strains were investigated. The inhibition zones of the Mueller Hinton agar in different extract concentrate ion showed that at 25 mg 20 µL-1, 50 mg 20 µL-1 and 100 mg 20 µL-1, the inhibition zones increased accordingly in S. aureu. However, N. sativa was found to be inactive against ESBL producers (E. coli and K. pneumoniae).
  Nagi A. ALHaj , Mariana N. Shamsudin , Norfarrah M. Alipiah , Hana F. Zamri , Ahmad Bustamam , Siddig Ibrahim and Rasedee Abdullah
  Problem statement: Seeds of Nigella sativa L., commonly known as black seed, have been used in traditional medicine by many Asian, Middle Eastern and Far Eastern Countries to treat headache, coughs, abdominal pain, diarrhea, asthma, rheumatism and other diseases. The seeds of this plant are the most extensively studied, both phytochemically and pharmacologically. The aqueous and oil extracts of the seeds have been shown to possess especially nowadays in pharmaceutical antioxidant, anti-inflammatory, anticancer, analgesic, antimicrobial activities and medicinal and cosmetic applications, sanitary, cosmetic, agricultural and food industries. Approach: The aim of this study was to formulate a new delivery system for dermal and cosmetic application by the incorporation of Nigella sativa essential oil into solid lipid nanoparticles SLN. SLN formulations were prepared following the high-pressure homogenization after starring and ultra-trax homognization techniques using hydrogenated palm oil Softisan 154 and N. sativa essential oil as lipid matrix, sorbitol and water as surfactants. The SLN formulation particle size was determined using Photon Correlation System (PCS). Results: The change of particle charge was studied by Zeta Potential (ZP) measurements, while the melting and re-crystallization behavior was studied using Differential Scanning Calorimetry (DSC). Data showed a high physical stability for both formulations at various storage temperatures during 3 months of storage. In particular, average diameter of N. sativa essential oil-loaded SLN did not vary during storage and increased slightly after freeze-drying the SLN dispersions. Conclusion: Therefore, obtained results showed that the studied SLN formulations are suitable carriers in pharmaceutical and cosmetic fields.
  Nagi A. AL-Haj , Nurmas I. Mashan , Mariana N. Shamsudin , Habsah Mohamad , Charles S. Vairappan and Zamberi Sekawi
  Problem statement: Antimicrobial resistance is the major problem of global dimensions with a significant impact on morbidity, mortality and healthcare-associated costs. The problem has recently been worsened by the steady increase in multiresistant strains and by the restriction of antibiotic discovery and development programs. Methicillin-resistant Staphylococcus aureus, pseudomonads and Escherichia coli are a major nosocomial and community-acquired pathogens for which few existing antibiotics are efficacious. The current study was conducted to investigate antibacterial activity of natural seaweed sources. Approach: Gracilaria changii Euchema denticulatum and sea cucumbers extracts against Methicillin-resistant Staphylococcus aureus, Escherichia coli, Streptococcus pyogenes, Vibrio cholerae, Pseudomonas aeruginosa and Klebsiella pneumoniae. Results: The Minimal Inhibitory Concentration (MIC) values and Minimal Bactericidal Concentration (MBC) values of methanol extract were used against all assayed bacteria. Results indicated that G. changii, E. denticulatum and sea cucumbers extracts must possess major antibacterial components against infectious microorganisms. Conclusion: The results obtained indicate that Gracilaria changii and Euchema denticulatum could be a source of natural products with antibiotic modifying activity to be used against multidrug resistant bacteria.
  Lai L. Suang , Zamberi Sekawi , Nagi A. Al-Haj , Mariana N. Shamsudin , Rasedee Abdullah and Rahmah Mohamed
  Burkholderia pseudomallei is the causative agent of melioidosis, a serious disease of man and animals. The high mortality of B. pseudomallei infections may cause by lipopolysaccharides, an endotoxin. The biosynthesis of LPS is complex comprising three components, lipid A, core oligosaccharide and O-specific antigen. In the current study, by using the available B. pseudomallei genome database provided by Wellcome. The study demonstrated that the bioinformatics comparative technique was able to annotate LPS genes in Burkholderia pseudomallei. By developing a simple and easy flow chart including the using of Artemis software, total of 44 putative ORFs involved in biosynthesis of lipopolysaccharide for B. pseudomallei and the genetic mapping for the ORFs have been successfully determined using bioinformatics and laboratory approach. It is about 95.7% of success for annotation based on the 46 genes that act as references. In near future, a suitable vaccine or antimicrobial may be developed by targeting the genes encoding the various components essential in LPS biosynthesis and survival of the pathogen.
  Lai L. Suang , Zamberi Sekawi , Nagi A. Al-Haj , Mariana N. Shamsudin , Rasedee Abdullah and Rahmah Mohamed
  Recently several cases of melioidosis have been reported in the tropical climates, especially in Southeast Asia where, it is endemic, it also occurs sporadically throughout the world. The diagnosis of the acute or chronic infection remains challenging. The present study highlight on the optimized and reliable technique based DNA preparation for use in Polymerase Chain Reaction (PCR) assay. PCR amplification with specific pair of primer for each putative gene was proving specific for amplification of genes in Burkholderia pseudomallei strain D286. The PCR mixture with addition of DMSO, formamide and glycerol could ease the PCR optimization where different pairs of primers were involved. The findings of this study have contributed to some information on the molecular bases of the LPS biosynthesis genes in B. seudomallei specifically for strain D286. The specific primer pairs with the PCR mixture could be used in developing a PCR diagnosis of melioidosis.
  Nurmas I. Mashan , Nagi A. Al-Haj , Mariana N. Shamsudin , Habsah Mohamad , Charles S. Vairappan and Zamberi Sekawi
  Polymerase Chain reaction amplification of DNA was performed to used to study the presence and effect of treated and untreated Stapylococcus aureus genes sav1017 and adaB with marine seaweeds Gracilaria changii and Euchema denticulatum. From the sequencing analysis, the changes were detected in the gene sequence of adaB and sav1017, genes after treated with either G. changii or E. denticulatum extract, which involved the substitution of the nucleotide base pair and insertion or deletion of the purine or pyrimidine base. The novel of this study is the extract of G. changii and E. denticulatum interrupting the important function in MRSA and non-MRSA isolates so that this pathogen cannot survive longer than usual. This significant finding can be applied to a medical treatment whereby both of these extracts can be used as an alternative treatment for the infection of S. aureus especially to overcome drug resistance treatment problems in MRSA strains.
  Nagi A. Al-Haj , Lai L. Suang , Mariana N. Shamsudin , Rasedee Abdullah , Rahmah Mohamed and Zamberi Sekawi
  Burkholderia pseudomallei is the causative agent of melioidosis, a serious disease of man and animals. The high mortality of B. pseudomallei infections may cause by Lipopolysaccharides (LPS), an endotoxin. The biosynthesis of LPS is complex comprising three components, lipid A, core oligosaccharide and O-specific antigen. In the current study was designed to further elucidate genes involved in the biosynthesis pathway of LPS in melioidosis agent followed with selected gene product expression with essential function for survival and virulence melioidosis agent. Expression of Bplps0013/lpxA and Bplps0007/rfaF successful expressed the entire proteins in 2 h with sizes of approximately 29 kDa and 43.7 kDa, respectively. The baseline information provided through the present research can be a preliminary approach towards the development of effective therapeutics against melioidosis.
  Nagi A. AL-Haj , E. Amghalia , Mariana N. Shamsudin , Rasedee Abdullah , Rahmah Mohamed and Zamberi Sekawi
  Methicillin-resistant Staphylococcus aureus strains have appeared in countries worldwide and continue to be one of the most common hospital pathogens and it has become increasingly prevalent in community-acquired infections and provided strong evidence for the independent origins of health care-associated Methicillin-resistant Staphylococcus aureus and community-acquired. It has been shown that methicillin-susceptible S. aureus strains become MRSA strains by the acquisition of a staphylococcal cassette chromosome mec element carrying the mecA gene, which is responsible for methicillin resistance and has become essential for the characterization of Staphylococcus aureus clones in epidemiological studies. The objective of this study to identify the staphylococcal cassette chromosome mec types of methicillin-resistant Staphylococcus aureus isolated from different Malaysian Hospitals. PCR amplification and sequencing analysis were performed to determine the SCCmec type of MRSA. The present research successfully established molecular characteristics of local MRSA contribute as initial database of these isolates in order to fully understand the epidemiology, microbiology and pathophysiology of these infections.
  Nagi A. AL-Haj , E. Amghalia , Mariana N. Shamsudin , Rasedee Abdullah , Rahmah Mohamed and Zamberi Sekawi
  For centuries honey had a valued place in traditional medicine, being used in the treatment of wounds and diseases of the gut. The scientific community has now rekindled interest in the therapeutic use of honey in modern medicine and a number of published reports support its use in certain medical conditions, including burns and wounds. The aim of the present study to the effectiveness of the antimicrobial activity of honey against Methicillin-Resistant Staphylococcus aureus (MRSA) and Methicillin-Sensitive Staphylococcus aureus (MSSA) isolates collected from various Malaysian hospitals. Thirty isolated of Staphylococcus aureus were found to be resistant to routinely used higher antibiotics. Using an agar incorporation technique the sensitivity of these strains to honey was tested by the method of minimum inhibitory concentration. All the tested strains of Staphylococcus aureus showed inhibition with honey at concentrations of 25 and 30%. The present study recommended that the multidrug-resistant Staphylococcus aureus infection particularly wound and burns honey may be useful for controlling infection.
  Nagi A. AL-Haj , Nurmas I. Masha , Mariana N. Shamsudin , Habsah Mohamad , Charles S. Vairappan and Zamberi Sekawi
  Methacillin Resistant Staphylococcus aureus (MRSA), Extended Spectrum Beta Lactamase (ESBL) organisms and Multiple Drug Resistant Organism (MDRO). Therefore, this study was designed to explore an alternative antibacterial product derived from seaweed extracts, Gracilaria changii and Euchema denticulatum, through the study of DNA and RNA encoding genes of interest in MRSA and non-MRSA. The target of this study is to amplification of several untreated and treated S. aureus and E. coli genes that are potentially involved in the antibacterial activities through RT-PCR assay. G. changii and E. denticulatum extracts showed inhibitory activity against S. aureus, several genes in this pathogen were chosen to study the effect of both seaweed extracts on the genes through PCR and RT-PCR analysis. However, the predicted inhibitory mechanism of both seaweeds extracts on mecA gene was not fully elucidated in the study. The investigation could scientifically proof the natural products to be potentially potent antibacterial agents.
 
 
 
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