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  1. Fulltext The Relationship between Type of Music and Anxiety Level among Malaysian Women during Mammography
    Mohd Zain, N., Ab Malek, N. N. F., Che Mut, N. A. I., Mohd Norsuddin, N., Abdullah Suhaimi, S. A., Ahmad Dahari, M., et al.
    Physics and Technology in Medicine, 2020;1(2):7-12.
    MyJurnal
    Music is one of the suggested interventions that can reduce stress caused by pain from mammography procedures. The different types of music might affect the anxiety level during a mammogram screening. Thus, the study aimed to determine the anxiety level of women who underwent mammogram screening according to different types of music. A cross-sectional study was conducted on 60 women by using the purposive sampling technique in the radiology department at randomly selected private hospitals in Klang Valley from November 2018 to November 2019. Respondents were randomly divided based on the day of mammogram screening into two groups; namely slow and upbeat music. Descriptive analysis was used to determine the anxiety level for each group and T-test analysis was used to compare the significance of anxiety level between both groups. A total of 60 respondents had participated in this study with a total of 30 (50.0%) respondents allocated in slow music, while another 30 (50.0%) respondents were allocated in upbeat music. Patients who underwent mammography screening while listening to slow music had a high anxiety level (70.0%) as compared to upbeat music group (63.3%). There was no significant effect for music, t (60) = -0.54, p = 0.59, despite slow music (M = 1.70, SD = 0.47) attaining higher anxiety level than the upbeat music (M = 1.63, SD = 0.49). Upbeat music has the potential in reducing the anxiety level of women undergoing mammography screening.
  2. Fulltext Cardiovascular lifestyle risks and cardiovascular screening activities among healthy government servants in Kuala Terengganu, Malaysia
    Mat Hasan N, Daud N, Shaaban J
    Malaysian Journal of Public Health Medicine, 2016;16(2):1-7.
    MyJurnal
    Lifestyles such as unhealthy dietary habits, physical inactivity and smoking are considered fundamental risk factors for cardiovascular disease. Preventive activities have been shown to reduce mortality and morbidity from cardiovascular disease. This study aimed to determine the prevalence of cardiovascular lifestyle risks and cardiovascular preventive activities among healthy government servants in Kuala Terengganu, Malaysia. A cross-sectional study was done from June to September 2013 among 121 government servants working at the Federal Complex, Kuala Terengganu. A questionnaire which consists of socio-demographic data, International Physical Activity Questionnaire (IPAQ), the dietary component of WHO STEPS and cardiovascular screening activities were used as tools. Clustering of cardiovascular lifestyle risks was defined as the presence of two or more of smoking, physical inactivity and unhealthy diet. Optimal cardiovascular screening is defined as having done the required screening for hypertension, diabetes, dyslipideamia and obesity. The study response rate was 90.9% (110 of 121). Prevalence of smoking, physical inactivity and unhealthy diet were 20%, 50% and 87% respectively. The prevalence of clustering of cardiovascular lifestyle risks was 57%. The prevalence of optimal cardiovascular screening for age was 49%. The prevalence of cardiovascular lifestyle risks among government servants in Kuala Terengganu is still high. About half of them did not have the optimal screening for cardiovascular disease. Measures need to be done to promote healthy lifestyle behaviors in the community. Effort should be made at the primary care level and public health to screen those with multiple cardiovascular lifestyle risks in order to optimize cardiovascular disease prevention.
  3. Genetic analysis and identification of SSR markers associated with rice blast disease in a BC2F1 backcross population
    Hasan N, Rafii MY, Abdul Rahim H, Nusaibah SA, Mazlan N, Abdullah S
    Genet. Mol. Res., 2017 Jan 23;16(1).
    PMID: 28128411 DOI: 10.4238/gmr16019280
    Rice (Oryza sativa L.) blast disease is one of the most destructive rice diseases in the world. The fungal pathogen, Magnaporthe oryzae, is the causal agent of rice blast disease. Development of resistant cultivars is the most preferred method to achieve sustainable rice production. However, the effectiveness of resistant cultivars is hindered by the genetic plasticity of the pathogen genome. Therefore, information on genetic resistance and virulence stability are vital to increase our understanding of the molecular basis of blast disease resistance. The present study set out to elucidate the resistance pattern and identify potential simple sequence repeat markers linked with rice blast disease. A backcross population (BC2F1), derived from crossing MR264 and Pongsu Seribu 2 (PS2), was developed using marker-assisted backcross breeding. Twelve microsatellite markers carrying the blast resistance gene clearly demonstrated a polymorphic pattern between both parental lines. Among these, two markers, RM206 and RM5961, located on chromosome 11 exhibited the expected 1:1 testcross ratio in the BC2F1 population. The 195 BC2F1 plants inoculated against M. oryzae pathotype P7.2 showed a significantly different distribution in the backcrossed generation and followed Mendelian segregation based on a single-gene model. This indicates that blast resistance in PS2 is governed by a single dominant gene, which is linked to RM206 and RM5961 on chromosome 11. The findings presented in this study could be useful for future blast resistance studies in rice breeding programs.
  4. Fulltext Morphological phylogenetic analysis of seven varieties of Ficus deltoidea Jack from the Malay Peninsula of Malaysia
    Fatihah HN, Mat N, Zaimah AR, Zuhailah MN, Norhaslinda H, Khairil M, et al.
    PLoS One, 2012;7(12):e52441.
    PMID: 23285045 DOI: 10.1371/journal.pone.0052441
    This study is the first report to suggest a morphological phylogenetic framework for the seven varieties of Ficus deltoidea Jack (Ficus: Moraceae) from the Malay Peninsula of Malaysia. Several molecular-based classifications on the genus Ficus had been proposed, but neither had discussed the relationship between seven varieties of F. deltoidea to its allies nor within the varieties. The relationship between seven varieties of F. deltoidea is still debated due to the extreme morphological variabilities and ambiguous boundaries between taxa. Thus, the correct identification of these varieties is important as several morphological characters are variety-specific. To test the monophyly and further resolved the relationship in F. deltoidea, a morphological phylogenetic analysis was conducted based on herbarium specimens representing the seven varieties of F. deltoidea that were collected from the Malay Peninsula of Malaysia, by using related species of the genus Ficus; F. grossularioides, F. ischnopoda and F. oleifolia as the outgroups. Parsimony and neighbour-joining analyses indicated that F. deltoidea is monophyletic, in that the seven varieties of F. deltoidea nested into two clades; clade subspecies deltoidea (var. deltoidea, var. bilobata, var. angustifolia, var. kunstleri and var. trengganuensis) and clade subspecies motleyana (var. intermedia and var. motleyana).
  5. Deleted in Colorectal Cancer (DCC) gene polymorphism is associated with H. pylori infection among susceptible Malays from the north-eastern region of Peninsular Malaysia
    Maran S, Lee YY, Xu S, Rajab NS, Hasan N, Mustaffa N, et al.
    Hepatogastroenterology, 2013 Jan-Feb;60(121):124-8.
    PMID: 22829558
    Using genome-wide case-control association approach, the current study aimed to determine whether genetic polymorphism(s) is/are associated with H. pylori infection among ethnic Malays from the north-eastern region of Peninsular Malaysia, a region with an exceptionally low prevalence for H. pylori infection and gastric cancer.
  6. Fulltext The Chemical Components of Sesbania grandiflora Root and Their Antituberculosis Activity
    Hasan N, Osman H, Mohamad S, Chong WK, Awang K, Zahariluddin AS
    Pharmaceuticals (Basel), 2012;5(8):882-9.
    PMID: 24280680 DOI: 10.3390/ph5080882
    Three isoflavanoids, isovestitol (1), medicarpin (2), and sativan (3), along with another known compound, betulinic acid (4), were isolated from the root of Sesbania grandiflora. The structures of the isolated compounds were characterised by means of spectroscopic techniques (UV, IR, MS, 1H- and 13C-NMR, DEPT, COSY, HMQC, HMBC, and MS analysis). All the tested compounds 1-4 exhibited antituberculosis activity against Mycobacterium tuberculosis H37Rv, with MIC values of 50 µg/mL for compounds 1-3, and 100 µg/mL for compound 4, whereas, the methanol extract exhibited antituberculosis activity of 625 µg/mL. This is the first report on the occurrence of isoflavonoids in this plant and their antituberculosis activity.
  7. Fulltext Embryo apoptosis identification: Oocyte grade or cleavage stage?
    Bakri NM, Ibrahim SF, Osman NA, Hasan N, Jaffar FH, Rahman ZA, et al.
    Saudi J Biol Sci, 2016 Jan;23(1):S50-5.
    PMID: 26858565 DOI: 10.1016/j.sjbs.2015.10.023
    Apoptosis is a programed cell death that is vital for tissue homeostasis. However, embryo apoptosis had been known to be related to embryo fragmentation which should be avoided in in vitro fertilization (IVF). The purpose of this study was to evaluate the relationship of embryo apoptosis with the grade of immature oocytes and cleavage stage of in vitro produced (IVP) cattle embryos. This study consisted of 345 oocytes collected through ovary slicing. Immature oocytes were graded as A, B and C. This grading was based on cumulus cell thickness and compactness. All oocytes then underwent an in vitro maturation (IVM) procedure. An IVF was done 24 h after IVM culture. Prior to staining, stage of cleaved embryos was determined and classified as either 2, 4, 8 or >8-cell embryo stage. Apoptosis status of cleaved IVP embryos was determined by using annexin V-FITC staining technique at 48 and 72 h post insemination (hpi). Apoptosis status for each embryo was classified as either early or late. The result showed that there was no significant difference (p > 0.05) of apoptosis status among grade A, B and C embryos. All grades of oocytes showed embryo apoptosis where 1.5% late apoptosis for grade A, 4.5% and 10.4% of early and late apoptosis for grade B and grade C. Early apoptosis was not seen in grade A embryo. We also noted no significant difference (p > 0.05) of apoptosis status between 2, 4, 8 and >8-cell embryo stage. Early apoptosis was also not seen in >8-cell stage. Even though there were no differences in apoptosis expression between the three classes, the cleavage rate of grade A oocytes was significantly higher (p 
  8. Free radical scavenging, antidiarrheal and anthelmintic activity of Pistia stratiotes L. extracts and its phytochemical analysis
    Bin Karim MF, Imam H, Sarker MM, Uddin N, Hasan N, Paul N, et al.
    Pak J Pharm Sci, 2015 May;28(3):915-20.
    PMID: 26004725
    In this phyto-pharmacological screening of Pistia stratiotes L leaf and root extracts each separately in two different solvents demonstrated its potential medicinal value. Apparent antioxidant value is demonstrated by DPPH, Nitric oxide scavenging and Ferric ion reducing method. Additionally, total flavonoid and phenolic compounds were measured. The leaf methanolic extract scavenged both nitric oxide (NO) and DPPH radical with a dose dependent manner. But the pet ether fraction of root was found to have highest efficacy in Fe(3±) reducing power assay. Flavonoid was found to contain highest in the pet ether fraction of root (411.35mg/g) in terms of quercetin equivalent, similarly highest amount (34.96mg/g) of total phenolic compounds (assayed as gallic acid equivalents) were found to contain in the same fraction. The methanolic fractions appeared less cytotoxic compared to pet ether extracts. The plant extracts caused a dose dependent decrease in faecal droppings in both castor oil and magnesium sulphate induced diarrhea, where as leaf extracts in each solvent appeared most effective. Also, the plant extracts showed anthelmintic activity in earthworm by inducing paralysis and death in a dose dependent manner. At highest doses (50 mg/ml) all fractions were almost effective as the positive control piperazine citrate (10 mg/ml). Thus, besides this cytotoxic effect it's traditional claim for therapeutic use can never be overlooked.
  9. Impact of COVID-19 on psychological distress among SME owners in Ghana: Partial least square-structural equation modeling (PLS-SEM) approach
    Uzir MUH, Bukari Z, Jerin I, Hasan N, Abdul Hamid AB, Thurasamy Ramayah
    J Community Psychol, 2021 Sep 29.
    PMID: 34590326 DOI: 10.1002/jcop.22716
    A critical part of the national economy is small and medium enterprises (SMEs). SME owners are vital contributors to the overall economy. Due to their limited capital and assets, they are more vulnerable. In comparison to their contribution, the value of assessing SME owner's depression, anxiety, and mental stress has been very minimal during the COVID-19 outbreak. Firms were forced to close due to lockdown, and they faced substantial business losses. Thus, this study aims to investigate SME owners' psychological distress due to business losses during this pandemic. The study used psychological parameters: Depression, Anxiety, Stress Scale-21 (DASS-21) to examine SME owners' psychological distress. A total number of 217 owners were surveyed through a judgmental sampling technique using a structured questionnaire. Data were analyzed employing partial least square-based structural equation modeling (PLS-SEM). The findings showed that DASS-21 parameters and fear of business loss affected psychological distress. Besides, fear of business loss increases psychological distress, whereas government support lessens the distress. Theoretically, this study extended the scope of DASS-21 scale and contributed to the literature of psychology. In terms of policy implications, this study provides useful information for government, policymakers, and SME owners about the effects mentioned above.
  10. Fulltext Chemical Sand Consolidation: From Polymers to Nanoparticles
    Alakbari FS, Mohyaldinn ME, Muhsan AS, Hasan N, Ganat T
    Polymers (Basel), 2020 May 07;12(5).
    PMID: 32392770 DOI: 10.3390/polym12051069
    The chemical sand consolidation methods involve pumping of chemical materials, like furan resin and silicate non-polymer materials into unconsolidated sandstone formations, in order to minimize sand production with the fluids produced from the hydrocarbon reservoirs. The injected chemical material, predominantly polymer, bonds sand grains together, lead to higher compressive strength of the rock. Hence, less amounts of sand particles are entrained in the produced fluids. However, the effect of this bonding may impose a negative impact on the formation productivity due to the reduction in rock permeability. Therefore, it is always essential to select a chemical material that can provide the highest possible compressive strength with minimum permeability reduction. This review article discusses the chemical materials used for sand consolidation and presents an in-depth evaluation between these materials to serve as a screening tool that can assist in the selection of chemical sand consolidation material, which in turn, helps optimize the sand control performance. The review paper also highlights the progressive improvement in chemical sand consolidation methods, from using different types of polymers to nanoparticles utilization, as well as track the impact of the improvement in sand consolidation efficiency and production performance. Based on this review, the nanoparticle-related martials are highly recommended to be applied as sand consolidation agents, due to their ability to generate acceptable rock strength with insignificant reduction in rock permeability.
  11. Development of sustainable polymer-based dielectric composites from agricultural waste: A review
    K B M, Abu Talip Yusof N, Sudhakar K, Zainol N, Hasan N, Abdul Karim MS
    Heliyon, 2024 Nov 15;10(21):e39118.
    PMID: 39524823 DOI: 10.1016/j.heliyon.2024.e39118
    Dielectrics are essential for storing and controlling electrical energy in the electrical and electronic industries. However, their production from non-renewable sources raises environmental concerns. This review investigates sustainable polymer-based dielectric composites made from agricultural waste, focusing on the various parameters that affect dielectric characteristics. These composites offer improved dielectric properties and contribute to waste reduction and environmental sustainability. Agricultural waste, including crop residues and by-products, offers a promising, sustainable source of dielectric composite materials. This review also highlights the feasibility of using agricultural waste-based polymer dielectric composites for dielectric material in various electronics applications. Dielectric composite's permittivity is influenced by carbon, oxygen, filler, temperature, cellulose, and morphological changes. Biodegradable materials like agricultural waste, which have good fibre and carbon content, can produce good dielectric constants, making them suitable for antennas and microwave absorbers. In conclusion, the review underscores the importance of sustainable practices in dielectric composite material development and the valuable role of agricultural waste in advancing environmentally friendly solutions.
  12. Fulltext Mediating Effects of Fear on Mental Health among Undergraduate Students during Open Distance Learning
    Abu Hasan NI, Ganggayah MD, Suhaimi S, Abu Hasan N, Jamal NF
    Malays J Med Sci, 2023 Dec;30(6):91-107.
    PMID: 38239247 DOI: 10.21315/mjms2023.30.6.10
    BACKGROUND: Online distance learning (ODL) known as the flexible learning environment can trigger a negative impact on students' mental health. The study aimed to identify the influence of fear as mediator between mental health problem and university students' perception on ODL.

    METHODS: This is a cross-sectional study involving a convenient sampling of 258 undergraduate students. Self-administered structured questionnaires adapted from the Depression, Anxiety and Stress Scale-21 (DASS-21) and the Fear of COVID-19 Scale (FCV-19S), were used to assess the severity of psychological symptoms (depression, anxiety and stress) and fear. The perception towards ODL is also designed to assess the students' perception related to ODL implementation. The data were analysed using descriptive statistics and Structural Equation Modelling-Partial Least Square (SEM-PLS).

    RESULTS: Overall, 84.2%, 95.0% and 67.4% of the participants experienced moderate to very severe level of depression, anxiety and stress, respectively. In addition, 82.6% of them suffering with moderate to extreme level of fear, of which 81.8% of participants had a negative view on ODL. The results of SEM-PLS revealed that there are complementary partial mediation effects of fear on the relationship between depression and students' perception during ODL (β = 0.502, t-value = 0.828, P-value = 0.017). The anxiety (β = 0.353, t-value = 5.401, P-value = 0.000) and stress (β = 0.542, t-value = 8.433, P-value = 0.000) have directly influenced on fear.

    CONCLUSION: This study demonstrated that university students had the prevalence of psychological symptoms and fear during ODL. In line with this, fear contributes significantly to the mental health status of university students and has negatively impacted the students' perception during ODL implementation.

  13. Fulltext Gastric precancerous lesions are associated with gene variants in Helicobacter pylori-susceptible ethnic Malays
    Maran S, Lee YY, Xu S, Rajab NS, Hasan N, Syed Abdul Aziz SH, et al.
    World J Gastroenterol, 2013 Jun 21;19(23):3615-22.
    PMID: 23801863 DOI: 10.3748/wjg.v19.i23.3615
    To identify genes associated with gastric precancerous lesions in Helicobacter pylori (H. pylori)-susceptible ethnic Malays.
  14. Data on genome resequencing of the rice cultivar MR219 and its abiotic stress tolerant mutant lines, NMR152 and NMR151
    Ahmad F, Hasan N, Hisham SN, Yusof SN, Hassan AA, Hussein S, et al.
    Data Brief, 2023 Feb;46:108815.
    PMID: 36582993 DOI: 10.1016/j.dib.2022.108815
    The genomics and genetic information of Malaysian rice (Oryza sativa L.) and their mutant lines are very limited. Therefore, the genome resequencing of two drought and submergence tolerant mutant rice lines, NMR152 and NMR151 and their parental line, MR219 was performed using Illumina Hi Seq 4000 platform with 20x sequencing coverage to facilitate the identification of causal mutations and the discovery of candidate variants of single nucleotide polymorphisms (SNPs) from their genome. The identification of SNPs would be useful in developing functional SNP markers related to drought and submergences resistance traits. Genome sequence data (FASTQ format) of the mutants and their parental line have been deposited into the National Center for Biotechnology Information (NCBI) database under sequence read archive (SRA) data with accessions SRR20824202 (NMR152), SRR20995190 (NMR151) and SRR21043964 (MR219), respectively.
  15. A single targeted gamma-ray irradiation induced an acute modulation of immune cells and related cytokines in EMT6 mouse-bearing tumour model
    Hasan N, Hasani NAH, Omar E, Sham FR, Fuad SBSA, Karim MKA, et al.
    Cancer Biomark, 2023;38(1):61-75.
    PMID: 37522193 DOI: 10.3233/CBM-220268
    BACKGROUND: A complicated interplay between radiation doses, tumour microenvironment (TME), and host immune system is linked to the active participation of immune response.

    OBJECTIVE: The effects of single targeted 2 Gy and 8 Gy gamma-ray irradiations on the immune cell population (lymphocytes, B-cells, T-cells, neutrophils, eosinophils, and macrophages) in EMT6 mouse-bearing tumour models was investigated.

    METHODS: The effects of both irradiation doses in early (96 hours) and acute phase (5 to 11 days) post-irradiation on immune parameters were monitored in blood circulation and TME using flow cytometry. Simultaneously, selected cytokines related to immune cells within the TME were measured using multiplex ELISA.

    RESULTS: A temporary reduction in systemic total white blood count (TWBC) resulted from an early phase (96 hours) of gamma-ray irradiation at 2 Gy and 8 Gy compared to sham control group. No difference was obtained in the acute phase. Neutrophils dominated among other immune cells in TME in sham control group. Eosinophils in TME was significantly increased after 8 Gy treatment in acute phase compared to sham control (p< 0.005). Furthermore, the increment of tumour necrosis (TNF)-α, eotaxin and interleukin (IL)-7 (p< 0.05) in both treatment groups and phases were associated with anti-tumour activities within TME by gamma-ray irradiation.

    CONCLUSION: The temporary changes in immune cell populations within systemic circulation and TME induced by different doses of gamma-ray irradiation correlated with suppression of several pro-tumorigenic cytokines in mouse-bearing EMT6 tumour models.

  16. Fulltext Risk factors of nonalcoholic fatty liver disease in lean body mass population: A systematic review and meta-analysis
    Alam S, Eslam M, Skm Hasan N, Anam K, Chowdhury MAB, Khan MAS, et al.
    JGH Open, 2021 Nov;5(11):1236-1249.
    PMID: 34816009 DOI: 10.1002/jgh3.12658
    The pathophysiology and risk factors of nonalcoholic fatty liver disease (NAFLD) among lean patients is poorly understood and therefore investigated. We performed a meta-analysis of observational studies. Of 1175 articles found through searching from Medline/PubMed, Banglajol, and Google Scholar by two independent investigators, 22 were selected. Data from lean (n = 6768) and obese (n = 9253) patients with NAFLD were analyzed; lean (n = 43 398) and obese (n = 9619) subjects without NAFLD served as controls. Age, body mass index, waist circumference, systolic blood pressure, and diastolic blood pressure (DBP) had significantly higher estimates in lean NAFLD patients than in lean non-NAFLD controls. Fasting blood sugar [MD(mean difference) 5.17 mg/dl, 95% CI(confidence interval) 4.14-6.16], HbA1c [MD 0.29%, 95% CI 0.11-0.48], and insulin resistance [HOMA-IR] [MD 0.49 U, 95% CI 0.29-0.68]) were higher in lean NAFLD patients than in lean non-NAFLD controls. All components of the lipid profile were raised significantly in the former group except high-density lipoprotein. An increased uric acid (UA) level was found to be associated with the presence of NAFLD among lean. Cardio-metabolic profiles of nonlean NAFLD patients significantly differs from the counter group. However, the magnitude of the difference of lipid and glycemic profile barely reached statistical significance when subjects were grouped according to lean and nonlean NAFLD. But DBP (slope: 0.19, P 
  17. Fulltext Acquired radioresistance in EMT6 mouse mammary carcinoma cell line is mediated by CTLA-4 and PD-1 through JAK/STAT/PI3K pathway
    Sham NFR, Hasani NAH, Hasan N, Karim MKA, Fuad SBSA, Hasbullah HH, et al.
    Sci Rep, 2023 Feb 22;13(1):3108.
    PMID: 36813833 DOI: 10.1038/s41598-023-29925-x
    Cancer recurrence is often associated with the acquisition of radioresistance by cancer tissues due to failure in radiotherapy. The underlying mechanism leading to the development of acquired radioresistance in the EMT6 mouse mammary carcinoma cell line and the potential pathway involved was investigated by comparing differential gene expressions between parental and acquired radioresistance cells. EMT6 cell line was exposed to 2 Gy/per cycle of gamma-ray and the survival fraction between EMT6-treated and parental cells was compared. EMT6RR_MJI (acquired radioresistance) cells was developed after 8 cycles of fractionated irradiation. The development of EMT6RR_MJI cells was confirmed with further irradiation at different doses of gamma-ray, and both the survival fraction and migration rates were measured. Higher survival fraction and migration rates were obtained in EMT6RR_MJI cells after exposure to 4 Gy and 8 Gy gamma-ray irradiations compared to their parental cells. Gene expression between EMT6RR_MJI and parental cells was compared, and 16 genes identified to possess more than tenfold changes were selected and validated using RT-PCR. Out of these genes, 5 were significantly up-regulated i.e., IL-6, PDL-1, AXL, GAS6 and APCDD1. Based on pathway analysis software, the development of acquired radioresistance in EMT6RR_MJI was hypothesized through JAK/STAT/PI3K pathway. Presently, CTLA-4 and PD-1 were determined to be associated with JAK/STAT/PI3K pathway, where both their expressions were significantly increased in EMT6RR_MJI compared to parental cells in the 1st, 4th and 8th cycle of radiation. As a conclusion, the current findings provided a mechanistic platform for the development of acquired radioresistance in EMT6RR_MJI through overexpression of CTLA-4 and PD-1, and novel knowledge on therapeutic targets for recurrent radioresistant cancers.
  18. Fulltext Development of custom lead shield and strainer for targeted irradiation for mice in the gamma cell chamber
    Hasan N, Sham NFR, Karim MKA, Fuad SBSA, Hasani NAH, Omar E, et al.
    Sci Rep, 2021 Jul 15;11(1):14559.
    PMID: 34267293 DOI: 10.1038/s41598-021-93964-5
    We presented a development of a custom lead shield and mouse strainer for targeted irradiation from the gamma-cell chamber. This study was divided into two parts i.e., to (i) fabricate the shield and strainer from a lead (Pb) and (ii) optimize the irradiation to the mice-bearing tumour model with 2 and 8 Gy absorbed doses. The lead shielding was fabricated into a cuboid shape with a canal on the top and a hole on the vertical side for the beam path. Respective deliveries doses of 28 and 75 Gy from gamma-cell were used to achieve 2 and 8 Gy absorbed doses at the tumour sites.
  19. QbD Assisted Systematic Review for Optimizing the Selection of PVP as a Ternary Substance in Enhancing the Complexation Efficiency of Cyclodextrins: a Pilot Study
    Mulenga G, Alahmed TAA, Sami F, Majeed S, Ali MS, Le JLJ, et al.
    AAPS PharmSciTech, 2024 Jun 11;25(5):134.
    PMID: 38862663 DOI: 10.1208/s12249-024-02845-3
    Inclusion complexes require higher concentration of Beta cyclodextrins (βCD) resulting in increased formulation bulk, toxicity, and production costs. This systematic review offers a comprehensive analysis using Quality by design (QbD) as a tool to predict potential applications of Polyvinylpyrrolidone (PVP) as a ternary substance to address issues of inclusion complexes. We reviewed 623 documents from 2013 to 2023 and Eighteen (18) research papers were selected for statistical and meta-analysis using the QbD concept to identify the most critical factors for selecting drugs and effect of PVP on inclusion complexes. The QbD analysis revealed that Molecular weight (MW), Partition coefficient (Log P), and the auxiliary substance ratio directly affected complexation efficiency (CE), thermodynamic stability in terms of Gibbs free energy (ΔG), and percent drug release. However, Stability constant (Ks) remained unaffected by any of these parameters. The results showed that low MW (250), median Log P (6), and a βCD: PVP ratio of 2:3 would result in higher CE, lower G, and improved drug release. PVP improves drug solubility, enhances delivery and therapeutic outcomes, and counteracts increased drug ionization due to decreased pH. In certain cases, its bulky nature and hydrogen bonding with CD molecules can form non-inclusion complexes. The findings of the study shows that there is potential molecular interaction between PVP and β-cyclodextrins, which possibly enhances the stability of inclusion complexes for drug with low MW and log P values less than 9. The systematic review shows a comprehensive methodology based on QbD offers a replicable template for future investigations into drug formulation research.
  20. Fulltext Whole genome resequencing data and grain quality traits of the rice cultivar Mahsuri and its blast disease resistant mutant line, Mahsuri Mutant
    Kamarudin SAA, Ahmad F, Hasan N, Hisham SN, Yusof SN, Abu Hassan A, et al.
    Data Brief, 2024 Feb;52:109974.
    PMID: 38229927 DOI: 10.1016/j.dib.2023.109974
    In Malaysia, rice mutant varieties that are genetically altered to confer resistance against blast disease have been substantially developed through mutational breeding program. However, due to the limited accessible information on the mutant lines, mutant gene variants corresponding to the disease resistance and other useful agronomic traits are yet to be exploited. Here, we conducted whole genome re-sequencing of blast resistance with kernel elongation traits in mutant line, Mahsuri Mutant (87,639,446 bp raw reads), and its parental line, Mahsuri (85,156,783 bp raw reads) using Illumina Novaseq 6000 sequencing platform with 30x sequencing coverage. The generated genome sequences are aimed to facilitate the discovery of causal mutation and single nucleotide polymorphisms (SNPs) related to the intended traits. The identified SNPs can be further employed to develop allele-specific SNP molecular markers to locate the mutant gene regions. The NGS data obtained (FASTQ format) of the parental and mutant lines have been deposited in the National Center for Biotechnology Information (NCBI) database under sequence read archive (SRA) xwith accession numbers SRR24388814 (Mahsuri) and SRR22952097 (Mahsuri Mutant) respectively.
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