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Fulltext The relationship between mental health and undergraduate student achievement: A study at Universiti Utara Malaysia. [Hubungan antara tahap kesihatan mental dan prestasi pelajar sarjana muda: satu kajian di Universiti Utara Malaysia]

Samsudin S, Tan KCH

Jurnal Sains Kesihatan Malaysia, 2016;14(1):11-16.
MyJurnal

Mental health is an integral component to the formation of human capital performance. Human capital with high productivity is the key factor to the growth of a country. Thus, this study aims to investigate the relationship between the level of mental health of undergraduate students in Universiti Utara Malaysia (UUM) with their performance. Mental health was measured using the General Health Questionnaire 12-item (GHQ-12) and the performance was based on the Cumulative Grade Point Average (CGPA). A total of 316 undergraduate students at UUM had answered questionnaires that were distributed. The data were analysed descriptively and the effect of the level of mental health on performance was tested using probit model. Based on GHQ-12, 48% respondents were found to have a good mental health status. A total of 67.21% of the students who obtain CGPA 3.67 and above have a good level of health compared with only 36.08% for those with CGPA under 3.67. Based on the probit model, the level of mental health was found to be significant at 1% level in influencing the CGPA. These findings provide indication to policy makers of the importance of mental health in influencing the students’ performance. Mental health education programs should be implemented or enhanced to raise awareness of the importance of good mental health state among students in higher education institution.
Keywords: CGPA; GHQ-12; mental health; productivity; Kedah; Malaysia
Fulltext High dose intravenous immunoglobulin for systemic lupus erythematosus with lupus nephritis and associated studies - case report

Lim SK, Tan SY

JUMMEC, 2007;10(2):51-56.
MyJurnal

Systemic lupus erythematosus (SLE) is one of the commonest systemic autoimmune diseases that can present with variable clinical manifestations. Intravenous Immunoglobulin (IVIG) has been used as a salvage therapy for severe lupus with encouraging results though there is yet randomised trial to support the usage. This report highlights the efficacy and safety of high dose IVIG in SLE patients with multi-organ involvement particularly lupus nephritis. We also reviewed the literature on the usage of IVIG for lupus nephritis. However, more studies are needed to further clarify the optimal therapeutic dosage and regime for IVIG and to identify the group of patients who might benefit the most from this expensive therapy.
Psychiatric sequelae to a civil disturbance

Tan ES, Simons RC

Br J Psychiatry, 1973 Jan;122(566):57-63.
PMID: 4509384
Heights and weights of a sample of Malaysian children

Tan PC, Wong CL

Med J Malaya, 1969 Sep;24(1):12-7.
PMID: 4243835
Chronic haemolytic anaemia; a report of three cases of Cooley's anaemia and five cases of acholuric jaundice seen in Malaya with a discussion on the differential diagnosis

FIELD CE, TAN EE

Med J Malaya, 1955 Sep;10(1):60-82.
PMID: 13287496
Fulltext Bilateral transposition of maxillary canines and first premolars : orthodontic management. a case report. [Abstract]

Tan CL, Wong XH

International Medical Journal Malaysia, 2017;16(21):39.
MyJurnal

Introduction: Transposition is a rare dental anomaly in positional interchange between two adjacent teeth. Studies indicated that tooth transpositions are more frequent unilateral than bilateral (12:1). It is a very rare phenomenon when the anomaly is bilateral and affects same teeth on both sides. The case of a 17 year old girl, with class I incisor relationship on class 1 skeletal base with bilateral transposition of maxillary canines-first premolars, severe crowding and posterior crossbite, is presented. This case report demonstrates the orthodontic management of bilateral transposition of maxillary canines-first premolars and by the end of treatment, the transpositions were maintained while achieving a good functional and aesthetic result.
KEYWORDS: transposition, maxillary canine, malocclusion
18F-FDG Uptake in Benign Fibrous Histiocytoma of Adrenal Gland: A Potential Pitfall

Tan TH, Lai CNB

Clin Nucl Med, 2017 Aug;42(8):622-623.
PMID: 28632691 DOI: 10.1097/RLU.0000000000001730

A 47-year-old man with newly diagnosed nasopharyngeal carcinoma underwent staging F-FDG PET/CT. Apart from showing increased FDG uptake in the primary site and locoregional nodal and liver metastases, an unusual site of intense FDG focus was demonstrated in the left adrenal gland. He underwent CT-guided biopsy, and the histopathologic diagnosis was benign fibrous histiocytoma.
Fulltext Insights into Cedecea neteri strain M006 through complete genome sequence, a rare bacterium from aquatic environment

Chan KG, Tan WS

Stand Genomic Sci, 2017;12:40.
PMID: 28748024 DOI: 10.1186/s40793-017-0255-1

Cedecea neteri M006 is a rare bacterium typically found as an environmental isolate from the tropical rainforest Sungai Tua waterfall (Gombak, Selangor, Malaysia). It is a Gram-reaction-negative, facultative anaerobic, bacillus. Here, we explore the features of Cedecea neteri M006, together with its genome sequence and annotation. The genome comprised 4,965,436 bp with 4447 protein-coding genes and 103 RNA genes.
Use of Carbon Nanotubes for the Analysis of Pesticide Residues in Fruits and Vegetables

Abdulrauf LB, Tan GH

J AOAC Int, 2016 Nov 01;99(6):1415-1425.
PMID: 28206878 DOI: 10.5740/jaoacint.16-0275

This review presents the application of carbon nanotubes as sorbent materials in the analysis of pesticide residues in fruits and vegetables. The advantages, limitations, and challenges of carbon nanotubes, with respect to their use in analytical chemistry, are presented. The efficiency of their application as extraction sorbent materials (in terms of LOD, LOQ, linearity, relative recovery, and RSD) in SPE, solid-phase microextraction, multi-plug filtration clean-up, matrix solid-phase dispersion, and the quick, easy, cheap, effective, rugged and safe method is reported. The synthesis, functionalization, purification, and characterization methods of carbon nanotubes are also discussed.
Fulltext Lipoma of vallecula-a case report

Tan KS, Jalaluddin WMS

BJR Case Rep, 2016;2(3):20150460.
PMID: 30459991 DOI: 10.1259/bjrcr.20150460

Lipomas of the larynx, oropharynx and hypopharynx are rare, accounting for approximately 1% of benign laryngeal neoplasms. We present a rare case of a simple lipoma arising from the right vallecula. A 55-year-old male presented with worsening dysphagia for 1 week. CT scan revealed a lesion of fat attenuation in the right vallecula. The patient underwent surgical excision and recovered uneventfully. To our knowledge, there are only two cases of vallecular lipoma that have been reported and they are both of spindle cell subtype and located on the left side. This is the first reported case of a simple lipoma arising from the right vallecula and causing obstructive symptoms. CT scan or MRI is essential in confirming the diagnosis and assessing the extent, thus allowing prompt excision, especially when the patient is symptomatic.
Fulltext Knowledge and Concerns of Parents Regarding Childhood Fever at a Public Health Clinic in Kuching, East Malaysia

Bong WT, Tan CE

Open Access Maced J Med Sci, 2018 Oct 25;6(10):1928-1933.
PMID: 30455776 DOI: 10.3889/oamjms.2018.339

BACKGROUND: Parental anxiety regarding fever may be unwarranted as most cases are owing to self-limiting causes.
AIM: To assess the level of knowledge and concerns regarding childhood fever among parents with young children in a public health clinic in Kuching, East Malaysia.
METHODS: This cross-sectional study was conducted among parents recruited from a maternal and child health clinic, with children aged 6 months to 6 years. The participants completed a self-administered questionnaire regarding their knowledge and concerns about childhood fever. Descriptive statistical analyses were performed, and associations between dependent and independent variables were determined.
RESULTS: Only 26.1% of participants were found to have good knowledge. Knowledge regarding childhood fever was significantly associated with parent's ethnicity, education level, and household income. About 72% of parents were always worried about their child's illness. Three major reasons for their concerns were persistently rising temperature; discomfort caused by the fever, and feared complications of fever.
CONCLUSION: Excessive parental anxiety due to poor knowledge and misconceptions about fever may lead to poor quality of life and inappropriate management of fever. Healthcare providers may help by educating parents about fever and serious signs that indicate the need to seek healthcare advice.
The protective mechanisms of polydatin in cerebral ischemia

Tang KS, Tan JS

Eur J Pharmacol, 2019 Jan 05;842:133-138.
PMID: 30385347 DOI: 10.1016/j.ejphar.2018.10.039

The prevalence of stroke is high in both developing and developed nations. It causes a heavy social and financial burden to the sufferers and their caregivers. Thrombolytic therapy is the only pharmacological treatment available for stroke. However, thrombolytic agents do not provide substantial improvement on long term motor and cognitive disabilities. Thus, there is a need to explore for new compounds that can halt or reverse the deterioration of neurons in the stroke patients' brain. Polydatin, a precursor of resveratrol, is a natural stilbene commonly found in food. This review article describes how different parameters were altered with ischemic injury and polydatin treatment, why it is important and how it could be beneficial or useful in future studies. Our review of polydatin provides convincing evidence regarding the potential of polydatin to be developed into preventive or therapeutic products for ischemic stroke. Nevertheless, additional studies are necessary in order to properly elucidate the biological mechanisms of polydatin, especially its molecular mechanisms of protection and target proteins, in cerebral ischemia.
Fulltext Renin dependent hypertension caused by accessory renal arteries

Chan PL, Tan FHS

Clin Hypertens, 2018;24:15.
PMID: 30410790 DOI: 10.1186/s40885-018-0100-x

Background: Hypokalemia in the presence of hypertension is often attributed to primary hyperaldosteronism as a cause of secondary hypertension, however secondary hyperaldosteronism may present similarly. Accessory renal arteries are variants in the vascular anatomy which are often thought to be innocuous but in some circumstances can cause renovascular hypertension leading to secondary hyperaldosteronism.
Case presentation: We report 2 cases of hypertension with secondary hyperaldosteronism associated with accessory renal arteries. Both patients presented with hypokalemia and further investigations revealed hyperaldosteronism with unsuppressed renin levels. Imaging studies showed the presence of accessory renal artery.
Conclusion: Accessory renal arteries are a potential cause renovascular hypertension which can be detected via CT angiography or magnetic resonance angiography. Hormonal evaluation should be undertaken to determine whether its presence contributes to hypertension in the patient as targeted treatment such as aldosterone antagonist can be initiated. Surgical intervention or renal denervation may be considered in resistant cases.
Fulltext Effect of High-Fat Diets on Oxidative Stress, Cellular Inflammatory Response and Cognitive Function

Tan BL, Norhaizan ME

Nutrients, 2019 Oct 25;11(11).
PMID: 31731503 DOI: 10.3390/nu11112579

Cognitive dysfunction is linked to chronic low-grade inflammatory stress that contributes to cell-mediated immunity in creating an oxidative environment. Food is a vitally important energy source; it affects brain function and provides direct energy. Several studies have indicated that high-fat consumption causes overproduction of circulating free fatty acids and systemic inflammation. Immune cells, free fatty acids, and circulating cytokines reach the hypothalamus and initiate local inflammation through processes such as microglial proliferation. Therefore, the role of high-fat diet (HFD) in promoting oxidative stress and neurodegeneration is worthy of further discussion. Of particular interest in this article, we highlight the associations and molecular mechanisms of HFD in the modulation of inflammation and cognitive deficits. Taken together, a better understanding of the role of oxidative stress in cognitive impairment following HFD consumption would provide a useful approach for the prevention of cognitive dysfunction.
The biological activities of the spiderworts (Tradescantia)

Tan JBL, Kwan YM

Food Chem, 2020 Jul 01;317:126411.
PMID: 32087517 DOI: 10.1016/j.foodchem.2020.126411

Widely used throughout the world as traditional medicine for treating a variety of diseases ranging from cancer to microbial infections, members of the Tradescantia genus show promise as sources of desirable bioactive compounds. The bioactivity of several noteworthy species has been well-documented in scientific literature, but with nearly seventy-five species, there remains much to explore in this genus. This review aims to discuss all the bioactivity-related studies of Tradescantia plants and the compounds discovered, including their anticancer, antimicrobial, antioxidant, and antidiabetic activities. Gaps in knowledge will also be identified for future research opportunities.
Fulltext Patterns of Use and Knowledge about Contact Lens Wear amongst Teenagers in Rural Areas in Malaysia

Mohd-Ali B, Tan XL

Int J Environ Res Public Health, 2019 12 17;16(24).
PMID: 31861174 DOI: 10.3390/ijerph16245161

BACKGROUND: Contact lenses (CLs) are more popular than spectacles for vision correction amongst the youth. Knowledge about the risks of wearing CLs is critical especially for those with poor access to public health education. This study investigates the patterns of use and level of knowledge about CL wear amongst teenagers living in rural areas in Selangor, Malaysia using a set of validated questionnaires.
METHODS: A total of 8500 self-administered questionnaires were distributed in eight selected secondary schools. The results were analysed using descriptive statistics.
RESULTS: A total of 2474 (29%) completed questionnaires were collected. The mean age of the respondents was 14.8 ± 1.5 years, and approximately 7.2% were CL wearers. The majority of the wearers were females (76.0%) and wore soft CLs (92.2%). Cosmetic purposes (58.1%) and comfort (24.6%) were the main reasons for wearing CLs. Many of the respondents purchased their lenses from optical shops (50.1%) and beauty accessory shops (15.6%), and approximately 10% did not disinfect their lenses properly. Regarding knowledge about CL care, approximately 56% of the respondents responded correctly.
CONCLUSION: Half of the respondents do not have sufficient knowledge about the risks of wearing CLs. Thus, aggressive public health education aimed at teenagers is needed to prevent improper CL usage.
First Report of Two Distinct Phytoplasma Species, 'Candidatus Phytoplasma cynodontis' and 'Candidatus Phytoplasma asteris,' Simultaneously Associated with Yellow Decline of Wodyetia bifurcata (Foxtail Palm) in Malaysia

Naderali N, Nejat N, Tan YH, Vadamalai G

Plant Dis, 2013 Nov;97(11):1504.
PMID: 30708488 DOI: 10.1094/PDIS-04-13-0412-PDN

The foxtail palm (Wodyetia bifurcata), an Australian native species, is an adaptable and fast-growing landscape tree. The foxtail palm is most commonly used in landscaping in Malaysia. Coconut yellow decline (CYD) is the major disease of coconut associated with 16SrXIV phytoplasma group in Malaysia (1). Symptoms consistent with CYD, such as severe chlorosis, stunting, general decline, and death were observed in foxtail palms from the state of Selangor in Malaysia, indicating putative phytoplasma infection. Symptomatic trees loses their green and vivid appearance as a decorative and landscape ornament. To determine the presence of phytoplasma, samples were collected from the fronds of 12 symptomatic and four asymptomatic palms in September 2012, and total DNA was extracted using the CTAB method (3). Phytoplasma DNA was detected in eight symptomatic palms using nested PCR with universal phytoplasma 16S rDNA primer pairs, P1/P7 followed by R16F2n/R16R2 (2). Amplicons (1.2 kb in length) were generated from symptomatic foxtail palms but not from symptomless plants. Phytoplasma 16S rDNAs were cloned using a TOPO TA cloning kit (Invitrogen). Several white colonies from rDNA PCR products amplified from one sample with R16F2n/R16R2 were sequenced. Phytoplasma 16S rDNA gene sequences from single symptomatic foxtail palms showed 99% homology with a phytoplasma that causes Bermuda grass white leaf (AF248961) and coconut yellow decline (EU636906), which are both members of the 16SrXIV 'Candidatus Phytoplasma cynodontis' group. The sequences also showed 99% sequence identity with the onion yellows phytoplasma, OY-M strain, (NR074811), from the 'Candidatus Phytoplasma asteris' 16SrI-B subgroup. Sequences were deposited in the NCBI GenBank database (Accession Nos. KC751560 and KC751561). Restriction fragment length polymorphism (RFLP) analysis was done on nested PCR products produced with the primer pair R16F2n/R16R2. Amplified products were digested separately with AluI, HhaI, RsaI, and EcoRI restriction enzymes based on manufacturer's specifications. RFLP analysis of 16S rRNA gene sequences from symptomatic plants revealed two distinct profiles belonging to groups 16SrXIV and 16SrI with majority of the 16SrXIV group. RFLP results independently corroborated the findings from DNA sequencing. Additional virtual patterns were obtained by iPhyclassifier software (4). Actual and virtual patterns yielded identical profiles, similar to the reference patterns for the 16SrXIV-A and 16SrI-B subgroups. Both the sequence and RFLP results indicated that symptoms in infected foxtail palms were associated with two distinct phytoplasma species in Malaysia. These phytoplasmas, which are members of two different taxonomic groups, were found in symptomatic palms. Our results revealed that popular evergreen foxtail palms are susceptible to and severely affected by phytoplasma. To our knowledge, this is the first report of a mixed infection of a single host, Wodyetia bifurcata, by two different phytoplasma species, Candidatus Phytoplasma cynodontis and Candidatus Phytoplasma asteris, in Malaysia. References: (1) N. Nejat et al. Plant Pathol. 58:1152, 2009. (2) N. Nejat et al. Plant Pathol. J. 9:101, 2010. (3) Y. P. Zhang et al. J. Virol. Meth. 71:45, 1998. (4) Y. Zhao et al. Int. J. Syst. Evol. Microbiol. 59:2582, 2009.
Effect of an individualised high-protein, energy-restricted diet on anthropometric and cardio-metabolic parameters in overweight and obese Malaysian adults: a 6-month randomised controlled study

Mitra SR, Tan PY

Br J Nutr, 2019 05;121(9):1002-1017.
PMID: 30761964 DOI: 10.1017/S0007114519000345

The aim of this study was to investigate the effectiveness of the Hipcref (high-protein, energy-restricted, high-vitamin E and high-fibre) diet in Malaysian adults on body composition and metabolic parameters after an intervention period of 6 months. Overweight/obese Malaysian adults (n 128; BMI≥23 kg/m2) were randomised to the Hipcref (n 65) or control diet (n 63). The intervention group received Hipcref diet charts based on their personal preferences. The control group followed a generalised dietary advice based on Malaysian Dietary Guidelines, 2010. All participants were responsible for preparing their own meals. There was a significant treatment group×time effect on anthropometric parameters (P<0·05) on an intention-to-treat basis. Pairwise comparisons revealed that Hipcref diet participants had significant reduction in weight, BMI, waist circumference, fat mass and percentage body fat at months 3 and 6 compared with baseline (P<0·001). The control group had significant increase in weight and BMI at months 3 and 6 compared with baseline (P<0·05). The Hipcref diet group had higher reduction in fasting insulin, insulin resistance and C-reactive protein levels compared with the control group at month 6 (P<0·05). Post-intervention, compared with the control group, the Hipcref diet group was found to consume significantly higher percentage energy from protein, and PUFA, higher energy-adjusted vitamin E (mg) and fibre (g), and lower total energy, lower percentage energy from fat and carbohydrate (P<0·05). The success of the Hipcref diet on overweight/obese Malaysian adults may be due to the combined effect of the nutrient composition of the Hipcref diet.
Fulltext A small RNA decreases the sensitivity of Shigella sonnei to norfloxacin

Gan IN, Tan HS

BMC Res Notes, 2019 Feb 21;12(1):97.
PMID: 30791948 DOI: 10.1186/s13104-019-4124-4

OBJECTIVES: Shigella is a human pathogen that causes shigellosis, an acute invasive intestinal infection. Recent studies in the model bacterium Escherichia coli (E. coli) provided evidence that small regulatory RNAs (sRNAs) can contribute to antimicrobial resistance or susceptibility. One of the sRNAs is SdsR, which increases sensitivity of E. coli against fluoroquinolone by repressing the drug efflux pump, TolC. However, no reports exist about the effect of SdsR on fluoroquinolone resistance in Shigella sonnei (S. sonnei). In this study, we established the effect of SdsR on the sensitivity of S. sonnei to norfloxacin.
DATA DESCRIPTION: We tested the effects of SdsR and SdsRv2 on fluoroquinolone resistance in S. sonnei in vivo. SdsRv2 is a synthetic version which promotes higher binding stability to tolC mRNA. Overexpression of either SdsR or SdsRv2 lowers the expression of tolC mRNA. Interestingly, SdsR and SdsRv2 promote the growth of S. sonnei in the presence of a sub-inhibitory concentration of norfloxacin. Mutant carrying SdsRv2 showed the highest growth advantage. This phenotype is opposite to the effect of SdsR reported in E. coli. This study is an example that demonstrates the difference in the phenotypic effect of a highly conserved sRNA in two closely related bacteria.
Fulltext Skin Color Preferences in a Malaysian Chinese Population

Tan KW, Stephen ID

Front Psychol, 2019;10:1352.
PMID: 31275195 DOI: 10.3389/fpsyg.2019.01352

Facial skin color influences the perceived health and attractiveness of Caucasian faces, and has been proposed as a valid cue to aspects of physiological health. Similar preferences for skin color have previously been found in African participants, while different preferences have been found among mainland Chinese participants. Here, we asked Malaysian Chinese participants (ethnic Chinese living in an Asian country with high levels of exposure to Western culture) to manipulate the skin color of Malaysian Chinese, Caucasian, and African faces to make them "look as healthy as possible." Participants chose to increase skin yellowness to a greater extent than to increase skin redness to optimize healthy appearance. The slight reduction in skin lightness chosen was not statistically significant after correction for multiple comparisons. While broadly in line with the preferences of Caucasian and African participants from previous studies, this differs from mainland Chinese participants. There may be a role for culture in skin color preferences, though methodological differences mean that further research is necessary to identify the cause of these differences in preferences.

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