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Redox proteomic analysis of mytilus edulis gills: effects of the pharmaceutical diclofenac on a non-target organism

Jaafar SN, Coelho AV, Sheehan D

Drug Test Anal, 2015 Oct;7(10):957-66.
PMID: 25833337 DOI: 10.1002/dta.1786

Veterinary and human pharmaceuticals are an emerging category of chemical pollutants with potential to cause serious toxicity to non-target organisms. Filter-feeding aquatic organisms such as mussels are especially threatened. In this study, the blue mussel, Mytilus edulis, was exposed to two doses (0.2 mg/L and 1 mg/L) of the anti-inflammatory diclofenac. Effects on the gill, the principal feeding organ of mussels, were investigated. It was noted that, while no effect was evident on gill glutathione transferase or catalase activities, there was a tissue-specific increase in glutathione reductase activity and reduction in total protein thiol groups. Two dimensional electrophoresis was performed and some affected proteins identified by in-gel tryptic digestion and peptide mass fingerprinting. Of these, four unique proteins (caspase 3/7-4, heat-shock cognate protein 70, a predicted enolase-like protein, arginine kinase) were found to be oxidized whilst eight unique proteins (β-tubulin, actin, isocitrate dehydrogenase, arginine kinase, heavy metal-binding HIP, cytosolic malate dehydrogenase, proteasome subunit alpha type 2, Mg: bb02e05 (glyceraldehyde-3-phosphate dehydrogenase) and superoxide dismutase) were found to have altered abundance. In addition, bioinformatic analysis suggested putative identities for six hypothetical proteins which either were oxidized or decreased in abundance. These were; 78 kDa glucose-regulated protein precursor, α-enolase, calreticulin, mitochondrial H + -ATPase, palmitoyl protein thioesterase 1 and initiation factor 5a. It is concluded that diclofenac causes significant oxidative stress to gills and that this affects key structural, metabolic and stress-response proteins.
Enhanced mechanical properties of hydrothermal carbamated cellulose nanocomposite film reinforced with graphene oxide

Gan S, Zakaria S, Syed Jaafar SN

Carbohydr Polym, 2017 Sep 15;172:284-293.
PMID: 28606537 DOI: 10.1016/j.carbpol.2017.05.056

Cellulose carbamate (CC) was synthesized via hydrothermal process and mixed with graphene oxide (GO) to form a homogeneous cellulose matrix nanocomposite films. The properties of CC/GO nanocomposite films fabricated using simple solution-mixing method with different GO loadings were studied. Transmission electron microscope analysis showed the exfoliation of self-synthesized GO nanosheets within the CC matrix. X-ray diffraction results confirmed the crystalline structure of CC/GO films as the CC/GO mass ratio increased from 100/0 to 100/4. The mechanical properties of CC/GO film were significantly improved as compared to neat CC film. From thermogravimetric analysis result, the introduction of GO enhanced the thermal stability and carbon yields. The 3D homogeneous porous structures of the CC/GO films were observed under Field emission scanning electron microscope. These improvements in nanocomposite film properties could be confirmed by Fourier transform infrared spectroscopy due to the strong and good interactions between CC and GO.
Fulltext Valorization of mangosteen, "The Queen of Fruits," and new advances in postharvest and in food and engineering applications: A review

Aizat WM, Ahmad-Hashim FH, Syed Jaafar SN

J Adv Res, 2019 Nov;20:61-70.
PMID: 31210985 DOI: 10.1016/j.jare.2019.05.005

One of the most prolific plants utilized in various applications is mangosteen (Garcinia mangostana L.). Rich in potent bioactive compounds, such as xanthones, mangosteen is known to possess pharmacologically important anti-inflammatory and anti-tumor properties. However, most previous reviews have only discussed the application of mangosteen in medicinal areas, yet more recent studies have diverged and valorized its usage in other scientific fields. In this review, the utilization of this exotic fruit in postharvest biology (phytohormone roles, metabolite profiling, bioactive compounds, isolation method optimization, chemical contaminant identification, and management of pests and fruit disorders), food science (food products, animal feed supplementation, and food shelf-life determination), and engineering fields (fabric and solar cell dyes, carbon dots, activated carbon, and biomedical advanced materials) is presented in detail. Research papers published from 2016 onward were selected and reviewed to show the recent research trends in these areas. In conclusion, mangosteen has been utilized for various purposes, ranging from usage in industrially important products to applications in advanced technologies and biomedical innovation.
Fulltext Comparison of job satisfaction among eight health care professions in private (non-government) settings

Chen AH, Jaafar SN, Noor AR

Malays J Med Sci, 2012 Apr;19(2):19-26.
PMID: 22973134 MyJurnal

A comparison of the job satisfaction of health care professionals has not been well studied in Malaysia. This study aimed to compare the job satisfaction level among 8 groups of health care professionals in private settings, using the Job Satisfaction Survey (JSS).
Understanding of elder abuse and neglect among health care professionals in Malaysia: An exploratory survey

Ahmed A, Choo WY, Othman S, Hairi NN, Hairi FM, Mohd Mydin FH, et al.

J Elder Abuse Negl, 2016 Jun-Jul;28(3):163-77.
PMID: 27149412 DOI: 10.1080/08946566.2016.1185985

Elder abuse and neglect (EAN) is a hidden public health challenge for Malaysia. This cross-sectional survey studied the awareness of EAN among 148 doctors and nurses from two neighboring states in Malaysia using a self-administered questionnaire exploring their knowledge, perceptions, practices, and experience concerning EAN. Both doctors and nurses demonstrated poor understanding of signs of EAN and exhibited misperceptions on reporting requirements. Both groups perceived EAN as a national burden and reporting it as their responsibility; but most felt they had not been trained to diagnose it. Many were unsure of procedures and whether their own intervention could be effective. Only four (nurses) of 41 participants who suspected abuse during the past year reported the cases. Targeted education and uniform protocols are mandatory to ensure best practice with regards to EAN. Further research is crucial to extend this inquiry into the broader health care workforce.
Effect of acid hydrolysis on regenerated kenaf core membrane produced using aqueous alkaline-urea systems

Padzil FN, Zakaria S, Chia CH, Jaafar SN, Kaco H, Gan S, et al.

Carbohydr Polym, 2015 Jun 25;124:164-71.
PMID: 25839807 DOI: 10.1016/j.carbpol.2015.02.013

Bleached kenaf core pulps (BKC) were hydrolyzed in H2SO4 (0.5M) at different time (0min to 90min) at room temperature. After the hydrolysis process, the viscosity average molecular weight (Mŋ) for BKC sample has reduced from 14.5×10(4) to 2.55×10(4). The hydrolyzed BKC was then dissolved in NaOH:urea:water and in LiOH:urea:water mixed solvent at the ratio of 7:12:81 and 4.6:15:80.4, respectively. The increased in hydrolysis time has decreased Mŋ of cellulose leading to easy dissolution process. Higher porosity and transparency with lower crystallinity index (CrI) of regenerated membrane produced can be achieved as the Mŋ reduced. The properties of membrane were observed through FESEM, UV-vis spectrophotometer and XRD. This study has proven that acid hydrolysis has reduced the Mŋ of cellulose, thus, enhanced the properties of regenerated membrane produced with assisted by alkaline/urea system.
Effects of varying degrees of doneness on the formation of heterocyclic aromatic amines in chicken and beef satay

Jinap S, Mohd-Mokhtar MS, Farhadian A, Hasnol ND, Jaafar SN, Hajeb P

Meat Sci, 2013 Jun;94(2):202-7.
PMID: 23501251 DOI: 10.1016/j.meatsci.2013.01.013

The study was carried out to determine the effect of cooking method on Heterocyclic Aromatic Amines (HAs) concentration in grilled chicken and beef (satay). Six common HAs were investigated: 2-amino-3-methylimidazo[4,5-f]quinolone (IQ), 2amino 3,4dimethylimidazo [4,5f]quinoline (MeIQ), 2-amino-3,8-dimethylimidazo[4,5-f]quinoxaline (MeIQx), 2-amino-3,4,8 trimethylimidazo[4,5-f]quinoxaline (4,8-DiMeIQx), 2-amino-3,7,8trimethylimidazo [4,5-f]quinoxaline (7,8-DiMeIQx), and 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP). Chicken and beef satay samples were grilled to medium and well done level of doneness. Charcoal grilled (treatment A), microwave pre-treatment prior to grilling (treatment B), and microwave-deep fried (treatment C) were applied to beef and chicken satay samples. The satay samples which were microwaved prior to grilling (B) showed significantly (p<0.05) lower HAs concentration as compared to those charcoal grilled (A). Both medium and well done cooked beef and chicken satay samples that were microwaved and deep fried (C) as an alternative method to grilling were proven to produce significantly lesser HAs as compared to charcoal-grilled (A) and microwaved prior to grilling (B).
Relationship between levels of thyroid stimulating hormone, age, and gender, with symptoms of depression among patients with thyroid disorders as measured by the Depression Anxiety Stress Scale 21 (DASS-21)

Saidi S, Iliani Jaafar SN, Daud A, Musa R, Nik Ahmad NNF

Enferm Clin, 2018 Feb;28 Suppl 1:180-183.
PMID: 29650181 DOI: 10.1016/S1130-8621(18)30063-9

OBJECTIVE: The aim of this study was to investigate the correlation between levels of depression symptoms and age, thyroid-stimulating hormone levels, and stressful life events of the participants.
METHOD: Patients above 18 years old, with any thyroid disorders, and without psychiatric disorders were included in this study. All participants completed the Depression Anxiety Stress Scale 21 (DASS-21). The depression symptom score was calculated and interpreted as follows: less than 9: no depression; between 10 and 13: mild depression; between 14 and 20: moderate depression; between 21 and 27: severe depression, and more than 28: extremely severe depression.
RESULTS: The total number of participants in this study was 199. There was no correlation between age, thyroid stimulating hormone, and the DASS score. There was also no significant difference in the DASS-21 score between genders. However, there was a positive correlation between depression symptoms and stressful life events (r=0.201, n=199, p < 0.05).
CONCLUSIONS: These findings would suggest that increased depression symptom scores correlate with increased stressful life events. A larger study should be undertaken to confirm these findings.
Omics approaches to unravel insecticide resistance mechanism in Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae)

Rosli MAF, Syed Jaafar SN, Azizan KA, Yaakop S, Aizat WM

PeerJ, 2024;12:e17843.
PMID: 39247549 DOI: 10.7717/peerj.17843

Bemisia tabaci (Gennadius) whitefly (BtWf) is an invasive pest that has already spread worldwide and caused major crop losses. Numerous strategies have been implemented to control their infestation, including the use of insecticides. However, prolonged insecticide exposures have evolved BtWf to resist these chemicals. Such resistance mechanism is known to be regulated at the molecular level and systems biology omics approaches could shed some light on understanding this regulation wholistically. In this review, we discuss the use of various omics techniques (genomics, transcriptomics, proteomics, and metabolomics) to unravel the mechanism of insecticide resistance in BtWf. We summarize key genes, enzymes, and metabolic regulation that are associated with the resistance mechanism and review their impact on BtWf resistance. Evidently, key enzymes involved in the detoxification system such as cytochrome P450 (CYP), glutathione S-transferases (GST), carboxylesterases (COE), UDP-glucuronosyltransferases (UGT), and ATP binding cassette transporters (ABC) family played key roles in the resistance. These genes/proteins can then serve as the foundation for other targeted techniques, such as gene silencing techniques using RNA interference and CRISPR. In the future, such techniques will be useful to knock down detoxifying genes and crucial neutralizing enzymes involved in the resistance mechanism, which could lead to solutions for coping against BtWf infestation.
A cluster randomized trial on improving nurses' detection and management of elder abuse and neglect (I-NEED): study protocol

Loh DA, Choo WY, Hairi NN, Othman S, Mohd Hairi F, Mohd Mydin FH, et al.

J Adv Nurs, 2015 Nov;71(11):2661-72.
PMID: 26031344 DOI: 10.1111/jan.12699

The aim of this study was to describe a trial protocol of an educational intervention for nurses to improve their awareness and practice in detecting and managing elder abuse and neglect.