Displaying publications 1 - 20 of 295 in total

  1. Tan SY
    Kidney Blood Press. Res., 2000;23(2):138-42.
    PMID: 10765117 DOI: 10.1159/000025967
    FcgammaRIIs are the most widely distributed of the Fcgamma receptor family and play an important role in the clearance of immune complexes. Evidence that the FcgammaRIIa-R131 allotype is less able to process and clear immune complexes effectively suggests that this may be a disease susceptibility factor for systemic lupus erythematosus (SLE). Data from studies published thus far do not agree on the potential role of FcgammaRIIa polymorphism in the genetics of SLE. Most studies in fact show no evidence for any correlation between polymorphism of FcgammaRIIa and risk for SLE. However, it remains to be determined whether FcgammaRIIa polymorphism may play a critical role in certain groups of patients, especially in those of differing ethnic background. Polymorphism of FcgammaRIIa may also be important in determining disease phenotype, and identification of this influence may have important implications in patient care and in identifying patients for more aggressive therapy.
  2. TAN, S. G., Adibah, A.B., LIEW, P. L.
    Known as ‘belangkas’ in Malaysia, horseshoe crabs have been used by locals for food, bait and as fertilizer. Currently, these ancient mariners are gaining a lot of attention as the amoebocyte from their blood are harvested by the biomedical industry for use to detect human pathogens in patients, injectable drugs and intravenous devices.
  3. Tan S, Rey J
    Australas Psychiatry, 2005 Mar;13(1):76-9.
    PMID: 15777418
    To examine the relationship between depression in children and adolescents, parental depression and parenting stress.
  4. Tan SH, Prepageran N
    J Laryngol Otol, 2015 Sep;129(9):928-31.
    PMID: 26193981 DOI: 10.1017/S0022215115001838
    This case report presents our experience of endoscopic transnasal management of medial intra- and extraconal lesions.
  5. Ismail A, Tan S
    Malays J Nutr, 2002 Sep;8(2):167-77.
    PMID: 22692475 MyJurnal
    This study aims to evaluate the antioxidant activity (total antioxidant and free radical scavenging activities) of seaweeds commercially available in the Malaysian supermarket. Four types of seaweeds namely Nori (Porphyra sp.), Kumbu (Laminaria sp.), Wakame (Undaria sp.) and Hijiki (Hijikia sp.) were used in the study. The extracts were prepared with water and ethanol, respectively. The b-carotene bleaching and 1,1-diphenyl-2-picrylhydrazyl (DPPH) assays were used to determine antioxidant properties of seaweeds by measuring the decrease in absorbance at 470 and 517 nm. In water extract, Kumbu showed the highest total antioxidant activity of 63% compared with other samples. Kumbu, Nori and Hijiki exhibited higher radical scavenging activity than Wakame when extracted with water. Wakame exhibited the highest antioxidant and free radical scavenging activities in ethanolic extract with 58% and EC50 = 0.42 mg/ml respectively. The results of ANOVA analysis show significant differences (p<0.05) in the means of total antioxidant and free radical scavenging activities of the seaweeds. The results showed that processed commercial seaweeds exhibited varying degrees of antioxidant properties.
  6. Chua, B. H., Rajinder, S., Tan, S. G., Faridah, Q. Z., Cheah, S. C.
    Microsatellites or simple sequence repeats (SSRs) are tandem repeats of DNA of 1-6 bp long. They ubiquitously occur in both eukaryotic and prokaryotic genomes. Because of their abundance,
    they have widespread applications in both animal and plant sciences; such as varietal identification, genetic mapping, QTL mapping, phylogenetic and diversity studies. Thus, SSRs have become valuable DNA markers for molecular biologists and geneticists. Microsatellites are markers
    of choice for many molecular geneticists because of their hypervariability, codominant
    inheritance, multi-allelism and PCR-based assaying of variations that are amenable to automation and high throughput assay. However, the utilization of microsatellite markers in the past was
    hampered by its laborious de novo isolations and species-specific nature.
    The blood of the Painted Storks (Mycteria leucocephala) and the Milky Storks (M. cinerea) from Malaysia were collected
    invasively from the breeding site. The blood was dropped on to FTA® cards and stored at room temperature. DNA was isolated from
    the FTA® cards through a modification of the Wizard DNA Purification kit (Promega) procedure and PCR was performed with 11 pairs
    of microsatellite primers of the American Wood Stork (M. americana). The collection of a drop of blood onto the card is superior to the
    usual practice of collecting about five ml of blood into a vacuum tube as it causes fewer traumas to these sensitive birds. Moreover, this
    collection procedure can be adopted for use in various wild animal species which are usually found in the remote areas of Malaysia as
    the sample collection cards can be transported back to the laboratory at room temperature. Our procedure allows the typing of several
    molecular genetic markers from just a drop of blood collected in the field and stored at room temperature alleviating the need for storage
    in expensive deep freezers or liquid nitrogen tanks.
  8. Elsie Yee, Y. S., Zainal Zahari, AHMAD ISMAIL, YAP, C.K., TAN, S. G
    Electrophoresis is a crucial step for the studies of proteins, allozymes, DNAs and RNAs. Two commonly used electrophoresis systems are agarose gel and polyacrylmide gel. Agarose gel is frequently used for DNAs and RNAs studies whereas polyacrylmide gel is widely used for the studies of other macromolecules such as proteins, allozymes (isozymes), DNAs and RNAs. The banding patterns of the gels, rather than the numbers of bands appearing on the gels are important for scoring in fingerprinting, footprinting and in population genetic studies.
  9. Tan SS, Adlin Nadia Z
    Med. J. Malaysia, 2017 Jun;72(3):165-174.
    PMID: 28733564 MyJurnal
    AIM: To describe the clinical characteristic of hepatitis C (HCV) patients and the results of pegylated interferon and ribavirin (PegIFN/RBV) therapy in a routine clinical practice.

    METHODS: A retrospective review of consecutive HCV patients treated with PegIFN/RBV in 2004 to 2012.

    RESULTS: A total of 273 patients received treatment. The mean age was 44.16 ± 10.5 years and 76% were male. The top 2 self-reported risks were blood or blood product transfusion before 1994 and injection drug use, found in 57.1% of patients. The predominant HCV genotype (GT) was 3 at 60.6%, second was GT1 at 36.1% and other GTs were uncommon at about 1% or less. About half of our patients have high baseline viral load (>800,000 iu/ml), 18.3% had liver cirrhosis and 22.3% had HIV co-infection. Co-morbid illness was found in 42.9%, hypertension and type 2 diabetes were the two most common. The overall sustained virological response (SVR) by intention-to-treat analysis were 54.9% (n=150/273), 41.2% (40/97) for GT1, 100% (5/5) for GT2 and 62% (101/163) for GT3. Subgroup analysis for HCV monoinfected, treatment naïve showed SVR of 49.2% (31/63) for GT1, 100% (5/5) for GT2 and 67% (69/103) for GT3. In HCV mono-infected and treatment experienced (n=29), the SVR was 28.6% (4/14) for GT1, 21.4% (69/103) for GT3. In the HIV/HCV co-infected, treatment naïve (n=56), the SVR was 28.6% (4/14) for GT1 and 64.3% (27/42) for GT3. Treatment naïve GT3 mono-infected patients had a statistically significant higher SVR compared to treatment experienced patients (P=0.001). In GT3 patients who achieved rapid virological response, the SVR was significantly higher at 85.2% (P< 0.001). The SVR for cirrhotics were low especially for GT1 at 21% (4/19) and 31% (4/13) based on all patients and treatment naïve HCV monoinfected respectively. In GT3 cirrhotics the corresponding SVR were 57.1% (16/28) and 60.9% (14/23). Premature discontinuation rate was 21.2% with the majority due to intolerable adverse events at 12.1%.

    CONCLUSIONS: In our routine clinical practice, the HCV patients we treated were young, predominantly of GT3 and many had difficult-to-treat clinical characteristics. The SVR of our patients were below those reported in Asian clinical trials but in keeping with some "real world" data.

  10. Tan LS, Tan S
    Med. J. Malaysia, 2018 Feb;73(1):54-56.
    PMID: 29531206 MyJurnal
    Tuberculosis (TB) is still an endemic disease in Malaysia. Cystic lung disease in post primary tuberculosis is not common. It can occur before, during or after completion of anti-TB treatment. Clinical history and review of serial chest radiograph is paramount to make the diagnosis. This case report highlights an interesting case of a young female patient who developed extensive cystic lung disease during the course of anti-TB treatment and the importance of recognizing this unusual manifestation.
  11. Tan SH, Prepageran N
    QJM, 2018 Oct 01;111(10):743.
    PMID: 29660085 DOI: 10.1093/qjmed/hcy084
  12. Tan SL, Juliana S, Sakinah H
    Malays J Nutr, 2011 Dec;17(3):287-99.
    PMID: 22655451 MyJurnal
    Compliance with medical nutrition therapy is important to improve patient outcomes. The purpose of this study was to determine dietary compliance and its association with glycemic control among outpatients with poorly controlled type 2 diabetes mellitus (T2DM) in Hospital Universiti Sains Malaysia (HUSM).
  13. Vashu R, Tan S, Wong AS
    J Clin Neurosci, 2009 Jul;16(7):960-2.
    PMID: 19346131 DOI: 10.1016/j.jocn.2008.09.013
    We report on two patients with intra-operative rupture of cerebral aneurysms that were managed by microsuturing. This is one of only a few reports of successful direct repair using suturing. We found that stitching remains an option to repair a tear of a saccular part of an aneurysm and a torn neck of a blister-like aneurysm, and thus this technique can be considered before sacrificing the artery.
  14. Vythilingam I, Tan SB, Krishnasamy M
    Trop. Med. Int. Health, 2002 Jun;7(6):539-40.
    PMID: 12031077
    The susceptibility of Culex sitiens to Japanese Encephalitis (JE) virus was examined in the laboratory. Cx. sitiens became infected with JE virus on day 8 and subsequently it is able to transmit the virus when it takes a blood meal. Both parts of the experiment were carried out using artificial membrane feeding technique.
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