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  1. Lee LP, Tan CH, Khomvilai S, Sitprija V, Chaiyabutr N, Tan KY
    Int J Biol Macromol, 2023 May 01;236:123727.
    PMID: 36863668 DOI: 10.1016/j.ijbiomac.2023.123727
    Snakebite envenoming is a medical emergency requiring urgent and specific treatment. Unfortunately, snakebite diagnostics are scarce, time-consuming and lacking specificity. Hence, this study aimed to develop a simple, quick and specific snakebite diagnostic assay using animal antibodies. Anti-venom horse immunoglobulin G (IgG) and chicken immunoglobulin Y (IgY) were produced against the venoms of four major medically important snake species in Southeast Asia, i.e., the Monocled Cobra (Naja kaouthia), Malayan Krait (Bungarus candidus), Malayan Pit Viper (Calloselasma rhodostoma), and White-lipped Green Pit Viper (Trimeresurus albolabris). Different capture:detection configurations of double-antibody sandwich enzyme-linked immunosorbent assay (ELISA) were constructed using both immunoglobulins, and the horse IgG:IgG-HRP configuration was found to be most selective and sensitive in detecting the corresponding venoms. The method was further streamlined to develop a rapid immunodetection assay, which is able to produce a visual color change within 30 min for discrimination between different snake species. The study shows it is feasible to develop a simple, quick and specific immunodiagnostic assay using horse IgG, which can be derived directly from antisera prepared for antivenom production. The proof-of-concept indicates it is a sustainable and affordable approach in keeping with on-going antivenom manufacturing activities for specific species in the region.
  2. Cheng HS, Tan SP, Wong DMK, Koo WLY, Wong SH, Tan NS
    Int J Mol Sci, 2023 Mar 15;24(6).
    PMID: 36982702 DOI: 10.3390/ijms24065633
    Blood is conventionally thought to be sterile. However, emerging evidence on the blood microbiome has started to challenge this notion. Recent reports have revealed the presence of genetic materials of microbes or pathogens in the blood circulation, leading to the conceptualization of a blood microbiome that is vital for physical wellbeing. Dysbiosis of the blood microbial profile has been implicated in a wide range of health conditions. Our review aims to consolidate recent findings about the blood microbiome in human health and to highlight the existing controversies, prospects, and challenges around this topic. Current evidence does not seem to support the presence of a core healthy blood microbiome. Common microbial taxa have been identified in some diseases, for instance, Legionella and Devosia in kidney impairment, Bacteroides in cirrhosis, Escherichia/Shigella and Staphylococcus in inflammatory diseases, and Janthinobacterium in mood disorders. While the presence of culturable blood microbes remains debatable, their genetic materials in the blood could potentially be exploited to improve precision medicine for cancers, pregnancy-related complications, and asthma by augmenting patient stratification. Key controversies in blood microbiome research are the susceptibility of low-biomass samples to exogenous contamination and undetermined microbial viability from NGS-based microbial profiling, however, ongoing initiatives are attempting to mitigate these issues. We also envisage future blood microbiome research to adopt more robust and standardized approaches, to delve into the origins of these multibiome genetic materials and to focus on host-microbe interactions through the elaboration of causative and mechanistic relationships with the aid of more accurate and powerful analytical tools.
  3. Yap VL, Tan LF, Rajagopal M, Wiart C, Selvaraja M, Leong MY, et al.
    BMC Complement Med Ther, 2023 Mar 28;23(1):93.
    PMID: 36978110 DOI: 10.1186/s12906-023-03921-0
    BACKGROUND: Scientific literature has demonstrated the association of free radicals in the aetiology of various chronic diseases. Hence, the identification of potent antioxidants remains a useful task. The combination of multiple herbs in polyherbal formulations (PHF) is often associated with greater therapeutic efficacy due to synergistic interactions. However, antagonism can occur in natural product mixtures and the resultant antioxidant potential might not always be the additive value of the antioxidant properties of each component. In this study, we aimed to evaluate the phytochemicals, antioxidative potential and interaction among the herbs in TC-16, a new PHF comprising Curcuma longa L., Zingiber officinale var. Bentong, Piper nigrum L., Citrofortunella microcarpa (Bunge) Wijnands and Apis dorsata honey.

    METHODS: TC-16 was screened for phytochemicals. Phenolic and flavonoid contents of TC-16 and its individual ingredients were determined, followed by assessment of antioxidant properties using in vitro assays including 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonate) (ABTS), 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant power (FRAP), oxygen radical absorbance capacity (ORAC) and β-carotene bleaching (BCB) assays. Interactions among the herbs were also investigated by calculating the difference in antioxidant activity and combination index.

    RESULTS: Alkaloids, flavonoids, terpenoids, saponins and glycosides were present in TC-16. TC-16 possessed the highest phenolic (46.14 ± 1.40 mg GAE/g) and flavonoid (132.69 ± 1.43 mg CE/g) contents following C. longa. Synergistic antioxidant activity among the herbs was evident in ORAC and BCB assays which uses mainly hydrogen atom transfer-based antioxidant mechanisms.

    CONCLUSIONS: TC-16 demonstrated roles in combating free radicals. In a PHF, synergistic interaction among the herbs is observed in some but not all mechanisms. Mechanisms showing synergistic interactions should be highlighted to maximise the beneficial property of the PHF.

  4. Lim SH, Tan TL, Ngo PW, Lee LY, Ting SY, Tan HJ
    Med J Malaysia, 2023 Mar;78(2):241-249.
    PMID: 36988537
    INTRODUCTION: Time is the greatest challenge in stroke management. This study aimed to examine factors contributing to prehospital delay and decision delay among stroke patients.

    MATERIALS AND METHODS: A cross-sectional study involving acute stroke patients admitted to Seri Manjung Hospital was conducted between August 2019 and October 2020 via faceto- face interview. Prehospital delay was defined as more than 120 minutes taken from recognition of stroke symptoms till arrival in hospital, while decision delay was defined as more than 60 minutes taken from recognition of stroke symptoms till decision was made to seek treatment.

    RESULTS: The median prehospital delay of 102 enrolled patients was 364 minutes (IQR 151.5, 1134.3) while the median for decision delay was 120 minutes (IQR 30.0, 675.0). No history of stroke (adj. OR 4.15; 95% CI 1.21, 14.25; p=0.024) and unaware of thrombolysis service (adj. OR 17.12; 95% CI 1.28, 229.17; p=0.032) were associated with higher odds of prehospital delay, while Indian ethnicity (adj. OR 0.09; 95% CI 0.02, 0.52; p=0.007) was associated with lower odds of prehospital delay as compared to Malay ethnicity. On the other hand, higher National Institutes of Health Stroke Scale (NIHSS) score (adj. OR 0.86; 95% CI 0.78, 0.95; p=0.002) was associated with lower odds of decision delay.

    CONCLUSION: Public awareness is crucial to shorten prehosital delay and decision delay for better patients' outcomes in stroke. Various public health campaigns are needed to improve the awareness for stroke.

  5. Kuan SW, Chua KH, Tan EW, Tan LK, Loch A, Kee BP
    PeerJ, 2022;10:e13265.
    PMID: 35441061 DOI: 10.7717/peerj.13265
    Cardiomyopathy (CMP) constitutes a diverse group of myocardium diseases affecting the pumping ability of the heart. Genetic predisposition is among the major factors affecting the development of CMP. Globally, there are over 100 genes in autosomal and mitochondrial DNA (mtDNA) that have been reported to be associated with the pathogenesis of CMP. However, most of the genetic studies have been conducted in Western countries, with limited data being available for the Asian population. Therefore, this study aims to investigate the mutation spectrum in the mitochondrial genome of 145 CMP patients in Malaysia. Long-range PCR was employed to amplify the entire mtDNA, and whole mitochondrial genome sequencing was conducted on the MiSeq platform. Raw data was quality checked, mapped, and aligned to the revised Cambridge Reference Sequence (rCRS). Variants were named, annotated, and filtered. The sequencing revealed 1,077 variants, including 18 novel and 17 CMP and/or mitochondrial disease-associated variants after filtering. In-silico predictions suggested that three of the novel variants (m.8573G>C, m.11916T>A and m.11918T>G) in this study are potentially pathogenic. Two confirmed pathogenic variants (m.1555A>G and m.11778G>A) were also found in the CMP patients. The findings of this study shed light on the distribution of mitochondrial mutations in Malaysian CMP patients. Further functional studies are required to elucidate the role of these variants in the development of CMP.
  6. Cho KH, Tan SP, Tan HY, Liew SY, Nafiah MA
    Planta Med, 2023 Jan;89(1):79-85.
    PMID: 35288885 DOI: 10.1055/a-1797-0548
    A phytochemical study has been carried out on CH2Cl2 extract of Alphonsea cylindrica leaves, resulting in the isolation of three new morphinan alkaloids. They are kinomenine (1: ), N-methylkinomenine (2: ), and hydroxymethylkinomenine (3: ). The structures of these compounds were elucidated by extensive spectroscopic analysis (1D and 2D NMR, IR, UV, HRESIMS) and comparison with the data reported in literature for similar alkaloids. Kinomenine (1: ) and N-methylkinomenine (2: ) showed weak inhibition against S. aureus (MIC values of 1: and 2:  = 500 µg/mL; pIC50 values in 95% C. I. of: 1:  = 2.9 to 3.0; 2:  = 2.9 to 3.1), while kinomenine (1: ) also showed weak inhibition against E. coli (MIC values of 1:  = 500 µg/mL; pIC50 value in 95% C. I. of: 1:  = 2.9) by broth microdilution method. The results obtained can be used as future referencefor the discovery of morphinans and the potential of A. cylindrica as an antibacterial source.
  7. Schee JP, Tan JS, Tan CY, Shahrizaila N, Wong KT, Goh KJ
    J Clin Neurol, 2024 Jul;20(4):422-430.
    PMID: 38951975 DOI: 10.3988/jcn.2023.0265
    BACKGROUND AND PURPOSE: Multiple acyl-CoA dehydrogenase deficiency (MADD) is an inherited disorder of fatty acid oxidation that causes lipid storage myopathy (LSM). This is the first report on MADD that describes the phenotypic and genetic features of a Malaysian cohort.

    METHODS: Among the >2,500 patients in a local muscle biopsy database, patients with LSM were identified and their genomic DNA were extracted from muscle samples and peripheral blood. All 13 exons of the electron-transfer flavoprotein dehydrogenase gene (ETFDH) were subsequently sequenced. Fifty controls were included to determine the prevalence of identified mutations in the normal population.

    RESULTS: Fourteen (82%) of the 17 LSM patients had MADD with ETFDH mutations. Twelve (86%) were Chinese and two were Malay sisters. Other unrelated patients reported that they had no relevant family history. Nine (64%) were females. The median age at onset was 18.5 years (interquartile range=16-37 years). All 14 demonstrated proximal limb weakness, elevated serum creatine kinase levels, and myopathic changes in electromyography. Three patients experienced a metabolic crisis at their presentation. Sanger sequencing of ETFDH revealed nine different variants/mutations, one of which was novel: c.998A>G (p.Y333C) in exon 9. Notably, 12 (86%) patients, including the 2 Malay sisters, carried a common c.250G>A (p.A84T) variant, consistent with the hotspot mutation reported in southern China. All of the patients responded well to riboflavin therapy.

    CONCLUSIONS: Most of our Malaysian cohort with LSM had late-onset, riboflavin-responsive MADD with ETFDH mutations, and they demonstrated phenotypic and genetic features similar to those of cases reported in southern China. Furthermore, we report a novel ETFDH mutation and possibly the first ever MADD patients of Malay descent.

  8. Tan JY, Tan CY, Gengadharan PN, Shahrizaila N, Goh KJ
    J Clin Neurol, 2024 Jul;20(4):412-421.
    PMID: 38951974 DOI: 10.3988/jcn.2023.0285
    BACKGROUND AND PURPOSE: Myasthenia gravis (MG) is clinically heterogeneous and can be classified into subgroups according to the clinical presentation, antibody status, age at onset, and thymic abnormalities. This study aimed to determine the clinical characteristics and outcomes of generalized MG (GMG) patients based on these subgroups.

    METHODS: Medical records of MG patients from 1976 to 2023 were reviewed retrospectively. Patients with pure ocular MG were excluded. Data on demographic, clinical characteristics, laboratory features, and outcomes were analyzed.

    RESULTS: This study included 120 GMG patients. There was a slight preponderance of female patients over male patients (male:female ratio=1:1.3), with the age at onset exhibiting a bimodal distribution. Female patients peaked at a lower age (21-30 years) whereas male patients peaked at a higher age (61-70 years). Most (92%, 105 of 114) patients had positive anti-acetylcholine receptor antibodies. Five patients were also tested for anti-muscle-specific tyrosine kinase antibodies, with two showing positivity. Thymectomy was performed in 62 (52%) patients, of which 30 had thymoma, 16 had thymic hyperplasia, 7 had an involuted thymus, and 6 had a normal thymus. There were significantly more female patients (68% vs. 45%, p=0.011) with early-onset disease (<50 years old) and thymic hyperplasia (33% vs. 0%, p<0.025). Most (71%) of the patients had a good outcome based on the Myasthenia Gravis Foundation of America postintervention status. GMG patients with early-onset disease had a significantly better outcome than patients with a late onset in univariate (58% vs. 37%, p=0.041) and multivariate (odds ratio=4.68, 95% confidence interval=1.17-18.64, p=0.029) analyses.

    CONCLUSIONS: Female patients with early-onset MG and thymic hyperplasia had significantly better outcomes, but only early-onset disease was independently associated with a good outcome. These findings are comparable with those of other studies.

  9. Tan JY, Tan CY, Yahya MA, Shahrizaila N, Goh KJ
    Muscle Nerve, 2024 May;69(5):597-603.
    PMID: 38488306 DOI: 10.1002/mus.28081
    INTRODUCTION/AIMS: Muscle strength, functional status, and muscle enzymes are conventionally used to evaluate disease status in idiopathic inflammatory myopathies (IIM). This study aims to investigate the role of quantitative muscle ultrasound in evaluating disease status in IIM patients.

    METHODS: Patients with IIM, excluding inclusion body myositis, were recruited along with age- and sex-matched healthy controls (HC). All participants underwent muscle ultrasound and clinical assessments. Six limb muscles were unilaterally scanned using a standardized protocol, measuring muscle thickness (MT) and echo intensity (EI). Results were compared with HC, and correlations were made with outcome measures.

    RESULTS: Twenty IIM patients and 24 HC were recruited. The subtypes of IIM were dermatomyositis (6), necrotizing myositis (6), polymyositis (3), antisynthetase syndrome (3), and nonspecific myositis (2). Mean disease duration was 8.7 ± 6.9 years. There were no significant differences in demographics and anthropometrics between patients and controls. MT of rectus femoris in IIM patients was significantly lower than HC. Muscle EI of biceps brachii and vastus medialis in IIM patients were higher than HC. There were moderate correlations between MT of rectus femoris and modified Rankin Scale, Physician Global Activity Assessment, and Health Assessment Questionnaire, as well as between EI of biceps brachii and Manual Muscle Testing-8.

    DISCUSSION: Muscle ultrasound can detect proximal muscle atrophy and hyperechogenicity in patients with IIM. The findings correlate with clinical outcome measures, making it a potential tool for evaluating disease activity of patients with IIM in the late phase of the disease.

  10. Tan JP, Gan SW, Cheah CSL, Tan SA, Nainee S, Yap CC, et al.
    J Res Adolesc, 2024 Jun;34(2):410-435.
    PMID: 38797867 DOI: 10.1111/jora.12959
    This study aimed to generate localized knowledge by investigating the perceptions and experiences of preadolescent grandchildren and grandparents regarding grandparenting and intergenerational interactions and how these processes were related to the social skills of preadolescents from three ethnic groups in Malaysia. Using a concurrent quantitative-qualitative mixed method research design, Chinese, Malay, and Indian preadolescents (N = 465; ages 9-12 years old; M = 10.27 years; SD = 1.03) from rural areas in Malaysia completed a self-administered quantitative survey; furthermore, 25 grandparents participated in one-on-one interviews. Survey findings showed that preadolescent grandchildren who reported higher grandparental warmth and support had greater social skills, mediated by positive grandparent-grandchildren (GP-GC) relationships. The GP-GC relationship and preadolescent social skills association was stronger for skipped generation compared to three-generation households. Interview findings revealed that grandparents expressed unconditional love and autonomy support in their grandparenting roles by guiding and encouraging their preadolescent grandchildren to make decisions. The GP-GC interactions served as a dynamic force in promoting preadolescents' social skills. By employing a decolonized approach and drawing on the lived experiences of grandparents from three ethnic backgrounds in rural Malaysia, the study provided an understanding of grandparenting practices and their general implications across the three ethnic groups. The interview responses highlighted both commonalities and specificities in grandparenting practices and relationship dynamics shaped by religious, class, and sociocultural dimensions in rural Malaysia.
  11. Wiart C, Tan PL, Rajagopal M, Chew YL, Leong MY, Tan LF, et al.
    BMC Complement Med Ther, 2024 Jul 12;24(1):268.
    PMID: 38997637 DOI: 10.1186/s12906-024-04548-5
    Wound is defined as the damage to biological tissues including skin, mucous membranes and organ tissues. The acute wound heals in less than 4 weeks without complications, while a chronic wound takes longer than 6 weeks to heal. Wound healing occurs in 4 phases, namely, coagulation, inflammatory, proliferative and remodeling phases. Triclosan and benzalkonium chloride are commonly used as skin disinfectants in wound healing. However, they cause allergic contact dermatitis and antibiotic resistance. Medicinal plants are widely studied due to the limited availability of wound healing agents. The present review included six commonly available medicinal plants in Malaysia such as Aloe barbadensis Miller, Carica papaya Linn., Centella asiatica Linn., Cymbopogon nardus Linn., Ficus benghalensis Linn. and Hibiscus rosa sinensis Linn. Various search engines and databases were used to obtain the scientific findings, including Google Scholar, ScienceDirect, PubMed Central and Research Gate. The review discussed the possible mechanism of action of medicinal plants and their active constituents in the wound healing process. In addition, their application in nanotechnology and wound dressings was also discussed in detail.
  12. Tan EW, Abdullah ADI, Ming LC, Poh CL, Goh BH, Lau TP, et al.
    Biomed Pharmacother, 2024 Jul;176:116744.
    PMID: 38810399 DOI: 10.1016/j.biopha.2024.116744
    Cancer is one of the major leading causes of mortality globally and chemo-drug-resistant cancers pose significant challenges to cancer treatment by reducing patient survival rates and increasing treatment costs. Although the mechanisms of chemoresistance vary among different types of cancer, cancer cells are known to share several hallmarks, such as their resistance to apoptosis as well as the ability of cancer stem cells to produce metastatic daughter cells that are resistant to chemotherapy. To address the issue of chemo-drug resistance in cancer cells, a tetracistronic expression construct, Ad-MBR-GFP, encoding adenovirus-mediated expression of MOAP-1, Bax, RASSSF1A, and GFP, was generated to investigate its potential activity in reducing or inhibiting the chemo-drug resistant activity of the human breast cancer cells, MCF-7-CR and MDA-MB-231. When infected by Ad-MBR-GFP, the cancer cells exhibited round cell morphology and nuclei condensation with positive staining for annexin-V. Furthermore, our results showed that both MCF-7-CR and MDA-MB-231 cells stained positively for CD 44 and negatively for CD 24 (CD44+/CD24-) with high levels of endogenous ALDH activity whereas SNU-1581 breast cancer cells were identified as CD 44-/CD 24- cells with relatively low levels of endogenous ALDH activity and high sensitivity toward chemo-drugs, suggesting that both CD 44 and ALDH activity contribute to chemo-drug resistance. Moreover, both MCF-7-CR and MDA-MB-231 cells showed strong chemo-drug sensitivity to cisplatin when the cells were infected by Ad-MBR-GFP, leading to 9-fold and 2-fold reduction in the IC 50 values when compared to cisplatin treatment alone, respectively. The data were further supported by 3D (soft agar) and spheroid cell models of MCF-7-CR and MDA-MB-231 cells which showed a 2-fold reduction of a number of cell colonies and spheroid size when treated with both Ad-MBR-GFP and cisplatin, and compared to control. Other than chemo-sensitivity, Ad-MBR-GFP-infected cancer cells retarded cell migration. Flow cytometry analysis showed that the mechanism of action of Ad-MBR-GFP involved cell cycle arrest at the G1 phase and inhibition of cellular DNA synthesis. Taken together, our investigation showed that Ad-MBR-GFP mediated chemo-drug sensitization in the infected cancer cells involved the activation of apoptosis signaling, cell cycle arrest, and inhibition of DNA synthesis, suggesting that Ad-MBR-GFP is potentially efficacious for the treatment of chemo-drug resistant cancers.
  13. Tan CE, Tan KA, Lau SCD, Teh KH, Sidik SM
    Belitung Nurs J, 2024;10(4):398-407.
    PMID: 39211459 DOI: 10.33546/bnj.3407
    BACKGROUND: Parents of children with hematological cancers such as leukemia and lymphoma need to cope with stress related to their child's diagnosis. The Coping Self-Efficacy Scale is a widely used and validated tool to measure an individual's confidence in dealing with stressful situations. Appropriate translation and validation are needed to produce a localized language version suitable for Malaysian contexts.

    OBJECTIVE: The study aimed to examine the linguistic and construct validity of the Malay version of the Coping Self-Efficacy Scale (CSES-My) among parents of children with hematological cancer.

    METHODS: The CSES-My was created through a sequential series of steps, starting with the translation of the original English version, followed by cultural adaptation, and then cognitive interviewing. The 26-item CSES-My was self-administered in a sample of parents of children with leukemia and lymphoma from October 2021 until February 2022. They were recruited via online or face-to-face methods. Exploratory factor analysis was performed to examine the construct validity of the CSES-My.

    RESULTS: A total of 165 complete responses were analyzed. The scale has two factors, including Personal Coping and Social Coping, accounting for 58.3% of the variance. Personal Coping (19 items, Cronbach's alpha = 0.958) represented the respondents' self-efficacy for independently executing coping strategies, whether through solving problems or changing the way they think about the situation. Social Coping (6 items, Cronbach's alpha = 0.867) represented their confidence in executing coping strategies, which involved using social resources such as seeking external support, distraction, and avoiding loneliness.

    CONCLUSIONS: The CSES-My had reliable and valid psychometric properties, providing evidence for its utility in evaluating coping self-efficacy among parents of children with leukemia or lymphoma in Malaysia. The CSES-My is a valuable tool for nurses and other healthcare professionals investigating coping self-efficacy in Malay-speaking populations, and it may also aid in the development of future coping interventions.

  14. Rajasegaran S, Ahmad NA, Tan SK, Lechmiannandan A, Tan YW, Sanmugam A, et al.
    J Pediatr Surg, 2024 Aug 13.
    PMID: 39237378 DOI: 10.1016/j.jpedsurg.2024.161687
    BACKGROUND: Quality of life (QOL) is an important clinical endpoint in paediatric chronic conditions. How parent-proxy reports differ from child self-reported QOL in patients with anorectal malformation (ARM) and Hirschsprung's disease (HD) has not been well examined to date. This study evaluates agreement between parent-proxy and child-reported QOL scores in ARM and HD patients compared to healthy controls.

    METHODS: We recruited ARM and HD patients aged 5-17 years and their parents at four tertiary referral centres between December 2020 to February 2023 who had corrective surgery done >12 months prior. Healthy controls were age-matched and gender-matched. They completed the Pediatric Quality of Life Inventory™ (PedsQL™) Generic Core Scales and General Well-Being (GWB) Scale. The questionnaires were administered in parallel parent-proxy-report and child self-report formats. Appropriate statistical analysis was performed with p 

  15. Gholivand S, Tan TB, Yusoff MM, Qoms MS, Wang Y, Liu Y, et al.
    Food Chem, 2025 Jan 15;463(Pt 4):141515.
    PMID: 39395350 DOI: 10.1016/j.foodchem.2024.141515
    In this study, supercritical carbon dioxide solution-enhanced dispersion (SEDS) was used to encapsulate hemp seed oil (HSO) within matrices of hemp seed protein isolate (HPI), pea protein (PPI) and soy protein (SPI) (0.5 % w/v) in complex with alginate (AL) (0.01 % w/v). The effects of different pH levels (3-9), NaCl concentrations (0-200 mmol/L) and simulated gastrointestinal conditions on HSO release and digestion patterns were analyzed. The findings revealed that SPI/AL microcapsules effectively maintained structural integrity and controlled oil release across diverse pH levels and salt concentrations. During gastrointestinal phases, minimal oil release was observed during oral digestion (<25 % for all samples), while significant (P 
  16. Majeed ABA, Ramasamy K, Tan MP, LIm SM, Hui KM, Tan AH, et al.
    Alzheimers Dement, 2024 Dec;20 Suppl 6(Suppl 6):e093563.
    PMID: 39782435 DOI: 10.1002/alz.093563
    BACKGROUND: Gut microbiota modulation of the brain function may present an opportunity to devise preventive or treatment strategies to manage impairments such as cognitive frailty (CF). This study aims to uncover the relationship between CF, gut microbiota, intestinal permeability and proteome.

    METHOD: A total of 137 fecal samples of the elderly were collected, and subjected to DNA analysis, and enzyme-linked immunosorbent assays (ELISA). Plasma samples were subjected to mass spectrometry proteomic analysis. The parameters of the subjects measured include functional reach test (FRT), handgrip strength (HGS), Visual Cognitive Assessment Test (VCAT), Montreal Cognitive Assessment (MoCA), timed up and go (TUG) and UCLA three-item loneliness scale (UCLA-3).

    RESULT: At the genus level, Alistipes which are potential drivers of dysbiosis, are significantly increased in CF subjects. Proteobacteria are also negatively linked to FRT, HGS, VCAT, and MoCA, but positively correlated to TUG and UCLA-3. Lactoferrin was upregulated in pre-frail subjects. The plasma apolipoprotein AI (Apo-AI) was upregulated 5 times in the CF subjects.

    CONCLUSION: These findings provide evidence for dietary intervention to alter gut microbiota that may modulate cognitive status.

  17. Tan MY, Thien GSH, Tan KB, Murthy HCA, Chan KY
    Sci Rep, 2025 Jan 07;15(1):1184.
    PMID: 39775184 DOI: 10.1038/s41598-024-85014-7
    In recent decades, poorly insulated windows have increased the energy consumption of heating and cooling systems, thus contributing to excessive carbon dioxide emissions and other related pollution issues. From this perspective, the electrochromic (EC) windows could be a tangible solution as the indoor conditions are highly controllable by these smart devices even at a low applied voltage. Literally, vanadium pentoxide (V2O5) is a renowned candidate for the EC application due to its multicolor appearance and substantial lithium insertion capacity. Despite the growing interest in V2O5 thin films, only limited literature study is available for V2O5 films specifically the annealing effects of these films at lower temperatures (
  18. Gengadharan PN, Ong WT, Tan JY, Shahrizaila N, Goh KJ, Tan CY
    Acta Neurol Belg, 2024 Dec 02.
    PMID: 39621280 DOI: 10.1007/s13760-024-02693-9
    INTRODUCTION: Myasthenia gravis (MG) can be classified according to clinical features into ocular MG (OMG) and generalised MG (GMG). However, OMG carries the risk of conversion to GMG. In this study, we aimed to determine the predictive factors for the secondary generalisation of OMG patients.

    METHODS: OMG patients followed-up in our hospital from January 1999 to November 2023 were retrospectively reviewed. Demographic and clinical characteristics data were collected from medical records. OMG patients with follow-up of

  19. Lim SW, Kansedo J, Tan IS, Nandong J, Tan YH, Lam MK, et al.
    J Environ Manage, 2025 Mar;376:124394.
    PMID: 39921954 DOI: 10.1016/j.jenvman.2025.124394
    With growing environmental concerns over plastic pollution, polyhydroxyalkanoates (PHAs) have recently gained significant attention as promising biodegradable polymers to substitute petroleum-based plastics. In this work, non-edible Cerbera odollam oil was employed as a renewable carbon source for PHA production to improve the economic competitiveness and environmental sustainability of the process. The optimization and mechanism of PHA production from C. odollam oil using Pseudomonas resinovorans DSM 21078 were presented. Through response surface methodology, the optimal condition for PHA production was 0.3 g/L urea concentration, 17.52 g/L oil concentration, and 10.46% (v/v) inoculum size. Results showed that a maximum PHA concentration of 0.50 g/L (with a polymer content of 26.0%) was attained at this optimal condition. The product was composed of 1.3% 3-hydroxybutyrate (3HB), 9.2% 3-hydroxyhexanoate (3HHx), 43.3% 3-hydroxyoctanoate (3HO), 32.0% 3-hydroxydecanoate (3HD), 11.9% 3-hydroxydodecanoate (3HDD), and 2.2% 3-hydroxytetradecanoate (3HTD). The PHA polymers exhibited adhesive, soft, and amorphous properties at room temperature, with high thermal stability, making them desirable for polymer processing. From the mechanism proposed, it was inferred that P. resinovorans DSM 21078 produces longer-chain PHA monomers mainly through the direct β-oxidation of long-chain fatty acids and shorter-chain monomers via the de novo fatty acid synthesis pathway when oil-based substrates are utilized. The findings from this work could pave the way for new paradigms that significantly enhance future research in the development of highly efficient oil resource valorization technologies to produce PHAs with intriguing properties, thereby contributing to the commercial success of sustainable bioplastics as an effective environmental management solution.
  20. Tan SY, Foo CN, Ng FL, Tan CH, Lim YM
    Gene, 2025 Jan 30;935:149043.
    PMID: 39486662 DOI: 10.1016/j.gene.2024.149043
    Breast cancer remains a significant global health concern, impacting millions of women every year. Maslinic acid (MA), a pentacyclic triterpene has been found to exert promising anticancer effect in various cancers, including breast cancer, yet the underlying mechanisms remain unclear. This study aims to elucidate the anticancer properties of MA via gene expression profiles in breast cancer cells. Cytotoxicity assay results revealed that MCF-7 exerts the highest sensitivity after 72 h of MA treatment followed by T-47D and MDA-MB-231. MCF-7 were then selected for in-depth analysis using the Nanostring nCounter Pancancer Pathway Panel to analyze the differential expression of genes (DEGs). Across three time points (24, 48, and 72 h), 20 significant DEGs were identified, of which 5 were upregulated and 15 were downregulated. In silico analysis indicated that these DEGs were involved in Pathway of Cancer, Focal Adhesion-PI3K-mTOR Signaling Pathway, PI3K-Akt, and Ras Signaling Pathway. The regulation of these DEGs contributes to several cellular activities such as apoptosis, inhibition of cell proliferation, cell cycle and survival, reduction of glycolysis, angiogenesis, and DNA repair. Additionally, the unfolded protein response emerged as a noteworthy biological process in this study. This study unravels the molecular mechanisms underpinning the therapeutic potential of MA against breast cancer.
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