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  1. Hooi YT, Ong KC, Tan SH, Perera D, Wong KT
    J Comp Pathol, 2020 Apr;176:19-32.
    PMID: 32359633 DOI: 10.1016/j.jcpa.2020.02.001
    Coxsackievirus A16 (CV-A16) and enterovirus A71 (EV-A71) are the major causes of hand, foot and mouth disease in young children. Although less so with CV-A16, both viruses are associated with serious neurological syndromes, but the differences between their central nervous system infections remain unclear. We conducted a comparative infection study using clinically-isolated CV-A16 and EV-A71 strains in a 1-day-old mouse model to better understand the neuropathology and neurovirulence of the viruses. New serotype-specific probes for in situ hybridization were developed and validated to detect CV-A16 and EV-A71 RNA in infected tissues. Demonstration of CV-A16 virus antigens/RNA, mainly in the brainstem and spinal cord neurons, confirmed neurovirulence, but showed lower densities than in EV-A71 infected animals. A higher lethal dose50 for CV-A16 suggested that CV-A16 is less neurovirulent. Focal virus antigens/RNA in the anterior horn white matter and adjacent efferent motor nerves suggested that neuroinvasion is possibly via retrograde axonal transport in peripheral motor nerves.
  2. Lim PS, Loke CF, Ho YW, Tan HY
    J Appl Microbiol, 2020 Nov;129(5):1374-1388.
    PMID: 32356362 DOI: 10.1111/jam.14678
    AIMS: To determine the mechanism underlying the serum cholesterol reduction effect by probiotics isolated from local fermented tapioca (Tapai).

    METHODS AND RESULTS: Lactic acid bacteria strains were isolated and examined for acid tolerance, bile salt resistance and hypocholesterolemic properties. Among the isolates, Lactobacillus plantarum TAR4 showed the highest cholesterol reduction ability (48·01%). The focus in the in vivo trial was to elucidate the cholesterol balance from findings pertaining to serum cholesterol reduction in rat model fed with high fat diet via oral administration. Rats fed with high-cholesterol diet supplemented with Lact. plantarum TAR4 showed significant reduction in serum total cholesterol (29·55%), serum triglyceride (45·31%) and liver triglyceride (23·44%) as compared to high-cholesterol diet (HCD) group. There was a significant increment in faecal triglyceride (45·83%) and faecal total bile acid (384·95%) as compared to HCD group.

    CONCLUSIONS: The findings showed that probiotic Lact. plantarum TAR4 supplementation reduced the absorption of bile acids for enterohepatic recycling and increased the catabolism of cholesterol to bile acids and not by suppressing the rate of cholesterol synthesis.

    SIGNIFICANCE AND IMPACT OF STUDY: Probiotic supplements could provide a new nonpharmacological alternative to reduce cardiovascular risk factors.

  3. Nagarajan K, Tong WY, Leong CR, Tan WN
    J Microbiol Biotechnol, 2021 Apr 28;31(4):493-500.
    PMID: 32627761 DOI: 10.4014/jmb.2005.05012
    Endophytic fungi are symbiotically related to plants and spend most of their life cycle within them. In nature, they have a crucial role in plant micro-ecosystem. They are harnessed for their bioactive compounds to counter human health problems and diseases. Endophytic Diaporthe sp. is a widely distributed fungal genus that has garnered much interest within the scientific community. A substantial number of secondary metabolites have been detected from Diaporthe sp. inhabited in various plants. As such, this minireview highlights the potential of Diaporthe sp. as a rich source of bioactive compounds by emphasizing on their diverse chemical entities and potent biological properties. The bioactive compounds produced are of significant importance to act as new lead compounds for drug discovery and development.
  4. Shakri NM, Husain S, Zahedi FD, Tan GC
    Medeni Med J, 2020;35(1):71-74.
    PMID: 32733753 DOI: 10.5222/MMJ.2020.45389
    Plasmablastic lymphoma (PBL) is a rare and aggressive variant of diffuse large B-cell lymphoma predominantly in oral cavities of human immunodeficiency virus (HIV)-positive male patients or immunosuppressive hosts. Limited number of reports on HIV-negative PBL in immunocompetent patients are available in the literature. We reported an unusual case of sinonasal PBL which occurred in an HIV-negative and immunocompetent female patient. She underwent endoscopic removal of the tumor and completed 6 cycles of chemotherapy (hyperfractionated-CVAD). Any finding in favour of tumour recurrence was not observed in positron-emission tomography scan (PET-scan) performed 18 months after the treatment.
  5. Brindha K, Paul R, Walter J, Tan ML, Singh MK
    Environ Geochem Health, 2020 Nov;42(11):3819-3839.
    PMID: 32601907 DOI: 10.1007/s10653-020-00637-9
    Monitoring the groundwater chemical composition and identifying the presence of pollutants is an integral part of any comprehensive groundwater management strategy. The present study was conducted in a part of West Tripura, northeast India, to investigate the presence and sources of trace metals in groundwater and the risk to human health due to direct ingestion of groundwater. Samples were collected from 68 locations twice a year from 2016 to 2018. Mixed Ca-Mg-HCO3, Ca-Cl and Ca-Mg-Cl were the main groundwater types. Hydrogeochemical methods showed groundwater mineralization due to (1) carbonate dissolution, (2) silicate weathering, (3) cation exchange processes and (4) anthropogenic sources. Occurrence of faecal coliforms increased in groundwater after monsoons. Nitrate and microbial contamination from wastewater infiltration were apparent. Iron, manganese, lead, cadmium and arsenic were above the drinking water limits prescribed by the Bureau of Indian Standards. Water quality index indicated 1.5% had poor, 8.7% had marginal, 16.2% had fair, 66.2% had good and 7.4% had excellent water quality. Correlation and principal component analysis reiterated the sources of major ions and trace metals identified from hydrogeochemical methods. Human exposure assessment suggests health risk due to high iron in groundwater. The presence of unsafe levels of trace metals in groundwater requires proper treatment measures before domestic use.
  6. Amul GGH, Tan GPP, van der Eijk Y
    PMID: 32610812 DOI: 10.34172/ijhpm.2020.97
    BACKGROUND: Transnational tobacco companies (TTCs) have a well-established presence in Southeast Asia and are now targeting other low- and middle-income countries (LMICs), especially Africa. While the tobacco industry's tactics in Southeast Asia are well documented, no study has systematically reviewed these tactics to inform tobacco control policies and movements in Africa, where the tobacco epidemic is spreading.

    METHODS: We conducted a systematic literature review of articles that describe tobacco industry tactics in Southeast Asia, which includes Singapore, Indonesia, Malaysia, the Philippines, Myanmar, East Timor, Thailand, Cambodia, Vietnam, Laos, and Brunei. After screening 512 articles, we gathered and analysed data from 134 articles which met our final inclusion criteria.

    RESULTS: Tobacco transnationals gained dominance in Southeast Asian markets by positioning themselves as good corporate citizens with corporate social responsibility (CSR) initiatives, promoting the industry as a pillar of, and partner for, economic growth. Tobacco transnationals also formed strategic sectoral alliances and reinforced their political ties to delay the implementation of regulations and lobby for weaker tobacco control. Where governments resisted the transnationals' attempts to enter a market, they used litigation and deceptive tactics including smuggling to pressure governments to open markets, and tarnished the reputation of public health organizations. The tobacco industry undermined tobacco advertising, promotion and sponsorship (TAPS) regulations through a broad range of direct and indirect marketing tactics.

    CONCLUSION: The experience of Southeast Asia with tobacco transnationals show that, beyond highlighting the public health benefits, underscoring the economic benefits of tobacco control might be a more compelling argument for governments in LMICs to prioritise tobacco control. Given the tobacco industry's widespread use of litigation, LMICs need more legal support and resources to counter industry litigations. LMICs should also prioritize measures to protect health policy from the vested interests of the tobacco industry, and to close regulatory loopholes in tobacco marketing restrictions.

  7. Abu Bakar MH, Shariff KA, Tan JS, Lee LK
    Eur J Pharmacol, 2020 Sep 15;883:173371.
    PMID: 32712089 DOI: 10.1016/j.ejphar.2020.173371
    Accumulating evidence indicates that adipose tissue inflammation and mitochondrial dysfunction in skeletal muscle are inextricably linked to obesity and insulin resistance. Celastrol, a bioactive compound derived from the root of Tripterygium wilfordii exhibits a number of attributive properties to attenuate metabolic dysfunction in various cellular and animal disease models. However, the underlying therapeutic mechanisms of celastrol in the obesogenic environment in vivo remain elusive. Therefore, the current study investigated the metabolic effects of celastrol on insulin sensitivity, inflammatory response in adipose tissue and mitochondrial functions in skeletal muscle of the high fat diet (HFD)-induced obese rats. Our study revealed that celastrol supplementation at 3 mg/kg/day for 8 weeks significantly reduced the final body weight and enhanced insulin sensitivity of the HFD-fed rats. Celastrol noticeably improved insulin-stimulated glucose uptake activity and increased expression of plasma membrane GLUT4 protein in skeletal muscle. Moreover, celastrol-treated HFD-fed rats showed attenuated inflammatory responses via decreased NF-κB activity and diminished mRNA expression responsible for classically activated macrophage (M1) polarization in adipose tissues. Significant improvement of muscle mitochondrial functions and enhanced antioxidant defense machinery via restoration of mitochondrial complexes I + III linked activity were effectively exhibited by celastrol treatment. Mechanistically, celastrol stimulated mitochondrial biogenesis attributed by upregulation of the adenosine monophosphate-activated protein kinase (AMPK) and sirtuin 1 (SIRT1) signaling pathways. Together, these results further demonstrate heretofore the conceivable therapeutic mechanisms of celastrol in vivo against HFD-induced obesity mediated through attenuation of inflammatory response in adipose tissue and enhanced mitochondrial functions in skeletal muscle.
  8. Seow EK, Tan TC, Lee LK, Easa AM
    J Texture Stud, 2020 12;51(6):909-916.
    PMID: 32537814 DOI: 10.1111/jtxs.12544
    Hardening issue in starch-based products that arises during storage, is ascribed to the long-term starch retrogradation which involves the recrystallisation of amylopectin. Present study aimed to delay storage hardening with the addition of high diastase honey bee honey (HBH) and low diastase kelulut bee honey (KBH) into glutinous rice flour (GRF) gels. As compared to KBH, retardation of texture deterioration by HBH was more prominent as evidenced by the significantly (p 
  9. Tan JW, Khoo TB, Burharudin NF, Mohamed Shah N
    Epilepsy Behav, 2020 10;111:107317.
    PMID: 32693382 DOI: 10.1016/j.yebeh.2020.107317
    PURPOSE: Self-management is crucial in the management of chronic diseases. However, information is limited on medication self-management among parents of children with epilepsy. This study aimed to assess medication self-management among parents of children with epilepsy and its association with sociodemographic data, clinical characteristics, antiepileptic drug (AED) regimen complexity, and parent self-reported AED adherence.

    METHOD: A cross-sectional survey was conducted at a tertiary care center in Malaysia from February 2019 to June 2019. Parents of children with epilepsy who were on AED for at least 3 months and aged ≤18 years old were recruited. Medication self-management was assessed using a validated Pediatric Epilepsy Medication Self-Management Questionnaire (PEMSQ). A higher total score reflects better medication self-management.

    RESULTS: A total of 166 patients were recruited. The mean ± standard deviation (SD) age of patients was 8.20 ± 5.21 years, and 51.8% and 36.7% of patients have generalized seizure and focal seizure, respectively. The mean ± SD PEMSQ score was 116.2 ± 11.28 from a total score of 135. Among the four domains of PEMSQ, the barriers to treatment contributed to the lowest mean scores. Univariate analysis showed that the following were significantly associated with poorer medication self-management: differences in ethnicity, religion; higher number of medications; presence of comorbidities; inability to swallow tablets; and a more complex AED regimen. Other variables were not significant. Multivariate analysis showed that only ethnicity and presence of comorbidity remained independently significant (R2 = 0.14; F [4, 161] = 6.28; p 

  10. Abd Raman HS, Tan S, August JT, Khan AM
    PeerJ, 2020;7:e7954.
    PMID: 32518710 DOI: 10.7717/peerj.7954
    Background: Influenza A (H5N1) virus is a global concern with potential as a pandemic threat. High sequence variability of influenza A viruses is a major challenge for effective vaccine design. A continuing goal towards this is a greater understanding of influenza A (H5N1) proteome sequence diversity in the context of the immune system (antigenic diversity), the dynamics of mutation, and effective strategies to overcome the diversity for vaccine design.

    Methods: Herein, we report a comprehensive study of the dynamics of H5N1 mutations by analysis of the aligned overlapping nonamer positions (1-9, 2-10, etc.) of more than 13,000 protein sequences of avian and human influenza A (H5N1) viruses, reported over at least 50 years. Entropy calculations were performed on 9,408 overlapping nonamer position of the proteome to study the diversity in the context of immune system. The nonamers represent the predominant length of the binding cores for peptides recognized by the cellular immune system. To further dissect the sequence diversity, each overlapping nonamer position was quantitatively analyzed for four patterns of sequence diversity motifs: index, major, minor and unique.

    Results: Almost all of the aligned overlapping nonamer positions of each viral proteome exhibited variants (major, minor, and unique) to the predominant index sequence. Each variant motif displayed a characteristic pattern of incidence change in relation to increased total variants. The major variant exhibited a restrictive pyramidal incidence pattern, with peak incidence at 50% total variants. Post this peak incidence, the minor variants became the predominant motif for majority of the positions. Unique variants, each sequence observed only once, were present at nearly all of the nonamer positions. The diversity motifs (index and variants) demonstrated complex inter-relationships, with motif switching being a common phenomenon. Additionally, 25 highly conserved sequences were identified to be shared across viruses of both hosts, with half conserved to several other influenza A subtypes.

    Discussion: The presence of distinct sequences (nonatypes) at nearly all nonamer positions represents a large repertoire of reported viral variants in the proteome, which influence the variability dynamics of the viral population. This work elucidated and provided important insights on the components that make up the viral diversity, delineating inherent patterns in the organization of sequence changes that function in the viral fitness-selection. Additionally, it provides a catalogue of all the mutational changes involved in the dynamics of H5N1 viral diversity for both avian and human host populations. This work provides data relevant for the design of prophylactics and therapeutics that overcome the diversity of the virus, and can aid in the surveillance of existing and future strains of influenza viruses.

  11. Wang M, Ling KH, Tan JJ, Lu CB
    Cells, 2020 06 18;9(6).
    PMID: 32570916 DOI: 10.3390/cells9061489
    Parkinson's Disease (PD) is a neurodegenerative disorder affecting the motor system. It is primarily due to substantial loss of midbrain dopamine (mDA) neurons in the substantia nigra pars compacta and to decreased innervation to the striatum. Although existing drug therapy available can relieve the symptoms in early-stage PD patients, it cannot reverse the pathogenic progression of PD. Thus, regenerating functional mDA neurons in PD patients may be a cure to the disease. The proof-of-principle clinical trials showed that human fetal graft-derived mDA neurons could restore the release of dopamine neurotransmitters, could reinnervate the striatum, and could alleviate clinical symptoms in PD patients. The invention of human-induced pluripotent stem cells (hiPSCs), autologous source of neural progenitors with less ethical consideration, and risk of graft rejection can now be generated in vitro. This advancement also prompts extensive research to decipher important developmental signaling in differentiation, which is key to successful in vitro production of functional mDA neurons and the enabler of mass manufacturing of the cells required for clinical applications. In this review, we summarize the biology and signaling involved in the development of mDA neurons and the current progress and methodology in driving efficient mDA neuron differentiation from pluripotent stem cells.
  12. Abdul Aziz AF, Tan CE, Ali MF, Aljunid SM
    Health Qual Life Outcomes, 2020 Jun 20;18(1):193.
    PMID: 32563246 DOI: 10.1186/s12955-020-01450-9
    BACKGROUND: Satisfaction with post stroke services would assist stakeholders in addressing gaps in service delivery. Tools used to evaluate satisfaction with stroke care services need to be validated to match healthcare services provided in each country. Studies on satisfaction with post discharge stroke care delivery in low- and middle-income countries (LMIC) are scarce, despite knowledge that post stroke care delivery is fragmented and poorly coordinated. This study aims to modify and validate the HomeSat subscale of the Dutch Satisfaction with Stroke Care-19 (SASC-19) questionnaire for use in Malaysia and in countries with similar public healthcare services in the region.

    METHODS: The HomeSat subscale of the Dutch SASC-19 questionnaire (11 items) underwent back-to-back translation to produce a Malay language version. Content validation was done by Family Medicine Specialists involved in community post-stroke care. Community social support services in the original questionnaire were substituted with equivalent local services to ensure contextual relevance. Internal consistency reliability was determined using Cronbach alpha. Exploratory factor analysis was done to validate the factor structure of the Malay version of the questionnaire (SASC10-My™). The SASC10-My™ was then tested on 175 post-stroke patients who were recruited at ten public primary care healthcentres across Peninsular Malaysia, in a trial-within a trial study.

    RESULTS: One item from the original Dutch SASC19 (HomeSat) was dropped. Internal consistency for remaining 10 items was high (Cronbach alpha 0.830). Exploratory factor analysis showed the SASC10-My™ had 2 factors: discharge transition and social support services after discharge. The mean total score for SASC10-My™ was 10.74 (SD 7.33). Overall, only 18.2% were satisfied with outpatient stroke care services (SASC10-My™ score ≥ 20). Detailed analysis revealed only 10.9% of respondents were satisfied with discharge transition services, while only 40.9% were satisfied with support services after discharge.

    CONCLUSIONS: The SASC10-My™ questionnaire is a reliable and valid tool to measure caregiver or patient satisfaction with outpatient stroke care services in the Malaysian healthcare setting. Studies linking discharge protocol patterns and satisfaction with outpatient stroke care services should be conducted to improve care delivery and longer-term outcomes.

    TRIAL REGISTRATION: No.: ACTRN12616001322426 (Registration Date: 21st September 2016.

  13. Qin Y, O Santos H, Khani V, Tan SC, Zhi Y
    Nutr Metab Cardiovasc Dis, 2020 08 28;30(9):1465-1475.
    PMID: 32675010 DOI: 10.1016/j.numecd.2020.05.015
    BACKGROUND AND AIMS: Dehydroepiandrosterone (DHEA) supplementation has gained attention in individuals with adrenal insufficiency, and as a tool for increasing androgens and estrogens whereby is proposed to improve the accretion of muscle and bone mass. However, DHEA supplementation has demonstrated negative effects on the lipid profile and, thus, we aimed to analyze the body of evidence in this regard.

    METHODS AND RESULTS: A systematic review and dose-response meta-analysis of randomized controlled trials (RCTs) was performed employing in Scopus, PubMed/Medline, Web of Science, Embase and Google Scholar, then including relevant articles that addressed the effects of DHEA supplementation on the lipid profile, up to February 2020. Combined findings were generated from 23 eligible articles. Hence, total cholesterol (TC) (weighted mean difference (WMD): -3.5 mg/dl, 95% confidence interval (CI): -8.5 to 1.6)), low-density lipoprotein-cholesterol (LDL-C) (WMD: 0.34 mg/dl, 95% CI: -3 to 3.7) and triglycerides (TG) levels (WMD: -2.85 mg/dl, 95% CI: -9.3 to 3.6) did not alter in DHEA group compared to the control, but HDL-C levels significantly reduced in DHEA group (WMD: -3.1 mg/dl, 95% CI: -4.9 to -1.3). In addition, a significant reduction in HDL-C values was observed in studies comprising women (WMD: -5.1 mg/dl, 95% CI: -7.2 to -3) but not in males (WMD: 0.13 mg/dl, 95% CI: -1.4 to 1.7).

    CONCLUSIONS: Overall, supplementation with DHEA did not change circulating values of TC, LDL-C and TG, whereas it may decrease HDL-C levels. Further long-term RCTs are required to investigate the effects of DHEA particularly on major adverse cardiac events.

  14. Tan CY, Razali SNO, Goh KJ, Shahrizaila N
    J Peripher Nerv Syst, 2020 09;25(3):256-264.
    PMID: 32511817 DOI: 10.1111/jns.12398
    We aimed to evaluate the key diagnostic features of Guillain-Barré syndrome (GBS) in Malaysian patients and validate the Brighton criteria. This was a retrospective study of patients presenting with GBS and Miller Fisher syndrome (MFS) between 2010 and 2019. The sensitivity of the Brighton criteria was evaluated. A total of 128 patients (95 GBS, 33 MFS) were included. In the GBS cohort, 92 (97%) patients presented with symmetrical limb weakness. Reflexes were depressed or absent in 90 (95%) patients. Almost all patients (94, 99%) followed a monophasic disease course, with 5 (5%) patients experiencing treatment-related fluctuations. Cerebrospinal fluid (CSF) albuminocytological dissociation was seen in 62/84 (73%) patients. Nerve conduction study (NCS) revealed neuropathy in 90/94 (96%) patients. In GBS patients with complete dataset (84), 56 (67%) patients reached level 1 of the Brighton criteria, 21 (25%) reached level 2, 3 (4%) reached level 3, and 4 (5%) reached level 4. In MFS, the clinical triad was present in 25 (76%) patients. All patients had a monophasic course. CSF albuminocytological dissociation was present in 10/25 (40%) patients. NCS was normal or showed sensory neuropathy in 25/33 (76%) patients. In MFS patients with complete dataset (25), 5 (20%) patients reached level 1 of the Brighton criteria, 14 (56%) reached level 2, 2 (8%) reached level 3, and 4 (16%) reached level 4. Inclusion of antiganglioside antibodies improved the sensitivity of the Brighton criteria in both cohorts. In the Malaysian cohort, the Brighton criteria showed a moderate to high sensitivity in reaching the highest diagnostic certainty of GBS, but the sensitivity was lower in MFS.
  15. Pasqualotto A, Ng M, Tan ZY, Kitada R
    Sci Rep, 2020 07 07;10(1):11189.
    PMID: 32636415 DOI: 10.1038/s41598-020-68034-x
    The sense of touch allows us to infer objects' physical properties, while the same input also produces affective sensations. These affective sensations are important for interpersonal relationships and personal well-being, which raises the possibility that tactile preferences are adapted to the characteristics of the skin. Previous studies examined how physical properties such as surface roughness and temperature influence affective sensations; however, little is known about the effect of compliance (physical correlate of softness) on pleasantness. Thus, we investigated the psychophysical link between softness and pleasantness. Pieces of human skin-like rubber with different compliances were pressed against participants' fingers. Two groups of participants numerically estimated the perceived magnitude of either pleasantness or softness. The perceived magnitude of pleasantness and softness both increased monotonically as a function of increasing object compliance, levelling off at around the end of the stimulus range. However, inter-subject variability was greater for pleasantness than for perceived softness, whereas the slope of the linear function fit to the magnitude estimates was steeper for softness than for pleasantness. These results indicate that object compliance is a critical physical determinant for pleasantness, whereas the effect of compliance on pleasantness was more variable among individuals than the effect on softness was.
  16. Tan YL, Mackay J, Kolandai MA, Dorotheo EU
    Asian Pac J Cancer Prev, 2020 Jul 01;21(S1):23-25.
    PMID: 32649167 DOI: 10.31557/APJCP.2020.21.S1.23
    OBJECTIVE: This case series describes tobacco industry tactics and strategies used to interfere, derail, delay, and weaken the development of effective health warning regulations in Malaysia, Cambodia, the Philippines, and Hong Kong.

    METHODS: A historical review of official reports, news articles, and gray literature was undertaken to identify tobacco industry tactics and strategies to hamper government efforts in implementing stronger pictorial health warning regulations in four Asian jurisdictions (Cambodia, Hong Kong, Malaysia, and the Philippines).

    RESULTS: Nineteen countries/jurisdictions in the WHO Western Pacific region currently require pictorial health warnings on cigarette packs, including some of the world's largest, in line with the WHO Framework Convention on Tobacco Control Article 11 Guidelines. In the four jurisdictions examined, tobacco industry interference consisted of lobbying and misinformation of high-level government officers and policy-makers, distributing industry-friendly legislative drafts, taking government to court, challenging government timelines for law implementation, and mobilizing third parties. Strong political leadership and strategic advocacy enabled governments to successfully overcome this industry interference.

    CONCLUSION: The tobacco industry uses similar tactics in different jurisdictions to derail, delay, and weaken the implementation of effective health warning policies. Identifying and learning from international experiences can help anticipate and defeat such challenges.

  17. Chong LA, Khoo EJ, Kamar AA, Tan HS
    Asian Bioeth Rev, 2020 Aug 13.
    PMID: 32837563 DOI: 10.1007/s41649-020-00142-2
    Malaysia had its first four patients with COVID-19 on 25 January 2020. In the same week, the World Health Organization declared it as a public health emergency of international concern. The pandemic has since challenged the ethics and practice of medicine. There is palpable tension from the conflict of interest between public health initiatives and individual's rights. Ensuring equitable care and distribution of health resources for patients with and without COVID-19 is a recurring ethical challenge for clinicians. Palliative care aims to mitigate suffering caused by a life-limiting illness, and this crisis has led to the awareness and urgency to ensure it reaches all who needs it. We share here the palliative care perspectives and ethical challenges during the COVID-19 pandemic in Malaysia.
  18. Yusof ANM, Muuti MZ, Ariffin LA, Tan MKM
    Asian Bioeth Rev, 2020 Sep;12(3):349-361.
    PMID: 32837556 DOI: 10.1007/s41649-020-00132-4
    The COVID-19 pandemic has raised challenges in dealing with information sharing by the public and the authorities. There are two categories of information sharing on social media that are believed to be potentially problematic and unethical: the sharing of personal information of patients and the sharing of fake news or false information. We present a discussion on how the response to the COVID-19 pandemic in Malaysia can be ethically handled in terms of information sharing. It is recommended that the public should cultivate the basic skills to evaluate information and determine its validity. On the other hand, the authorities should refrain from placing the blame on patients to avoid them from being stigmatized. It is crucial that all parties are aware of their ethical duty to ensure only ethical and valid information gets shared on social media.
  19. Tham HY, Song AA, Yusoff K, Tan GH
    Biotechniques, 2020 09;69(3):161-170.
    PMID: 32787565 DOI: 10.2144/btn-2020-0034
    Endolysins have been studied intensively as an alternative to antibiotics. In this study, endolysin derived from a phage which infects methicillin-resistant Staphylococcus aureus (MRSA) was cloned and expressed in Escherichia coli pET28a. Initially, the endolysin was cloned using BamHI/XhoI, resulting in expression of a recombinant endolysin which was expressed in inclusion bodies. While solubilization was successful, the protein remained nonfunctional. Recloning the endolysin using NcoI/XhoI resulted in expression of soluble and functional proteins at 18°C. The endolysin was able to form halo zones on MRSA plates and showed a reduction in turbidity of MRSA growth. Therefore, cloning strategies should be chosen carefully even in an established expression system as they could greatly affect the functionality of the expressed protein.
  20. Mohammed Abdul KS, Rayadurgam J, Faiz N, Jovanović A, Tan W
    J Cell Mol Med, 2020 09;24(18):10924-10934.
    PMID: 32794652 DOI: 10.1111/jcmm.15721
    In the present study, we have investigated potential cardioprotective properties of Isosteviol analogue we recently synthesized and named JC105. Treatment of heart embryonic H9c2 cells with JC105 (10 μM) significantly increased survival of cells exposed to hypoxia-reoxygenation. JC105 (10 μM) activated ERK1/2, DRP1 and increased levels of cardioprotective SUR2A in hypoxia-reoxygenation, but did not have any effects on ERK1/2, DRP1 and/or SUR2A in normoxia. U0126 (10 μM) inhibited JC105-mediated phosphorylation of ERK1/2 and DRP1 without affecting AKT or AMPK, which were also not regulated by JC105. Seahorse bioenergetic analysis demonstrated that JC105 (10 μM) did not affect mitochondria at rest, but it counteracted all mitochondrial effects of hypoxia-reoxygenation. Cytoprotection afforded by JC105 was inhibited by U0126 (10 μM). Taken all together, these demonstrate that (a) JC105 protects H9c2 cells against hypoxia-reoxygenation and that (b) this effect is mediated via ERK1/2. The unique property of JC105 is that selectively activates ERK1/2 in cells exposed to stress, but not in cells under non-stress conditions.
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