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Fulltext An update on HLA alleles as pharmacogenetic markers for antiepileptic drug-induced cutaneous adverse reaction

Then, Sue-Mian, Azman Ali Raymond

Neuroscience Research Notes, 2019;2(2):1-17.
MyJurnal

Epilepsy is a common neurological disorder affecting approximately 50 million people worldwide. Antiepileptic drugs (AEDs) are commonly used to treat the disease depending, mainlyon the type of seizure. However, the useof AEDs mayalso lead to cutaneous adverse drug reactions (cADR) such as toxic epidermal necrolysis (TEN), Stevens-Johnsonsyndrome (SJS), exfoliative dermatitis (ED) and drug‐induced hypersensitivity syndrome/drug reaction with eosinophilia and systemic symptoms (DIHS/DRESS), which are unwanted comorbidities in epilepsy. It was first discoveredthat the HLA-B*15:02 allele was strongly associatedwith carbamazepine(CBZ)-induced SJS/TEN amongHan Chinese and this ledto the discovery of other HLAallelesand cytochrome P450 (CYP) genes that were significantly associatedwith various AED-inducedcADRsacross variouspopulations. This mini-reviewis an update on the latest findings ofthe involvement of various HLA alleles and CYP alleles in cADRs caused by CBZ, phenytoin (PHT), oxcarbazepine (OXC) and lamotrigine(LTG) in different case-control studies around the world. From our review, we found that CBZ-and PHT-induced cADRsweremore commonly reportedthan the other AEDs.Therefore,there were morerobust pharmacogenetics studies related to these AEDs. OXC-and LTG-induced cADRswereless commonly reported,and somore studies are needed to validate the reported association of the newer reported HLA alleles with theseAEDs. It is also importantto considerthe allelic frequency within a given population before concludingthe use of thesealleles as genetic markers to prevent AED-induced cADR. Overall, the current body of research pointto a combination of alleles as a better pharmacogenetic marker comparedto the use of a single gene as a genetic marker for AED-induced cADR.

Matched MeSH terms: HLA-B Antigens
Seroprevalence of sarcocystosis in the local communities of Pangkor and Tioman Islands using recombinant surface antigens 3 (rSAG3) of Sarcocystis falcatula

Tengku-Idris TIN, Fong MY, Lau YL

Trop Med Int Health, 2018 12;23(12):1374-1383.
PMID: 30286271 DOI: 10.1111/tmi.13160

OBJECTIVE: To investigate the seroprevalence of Sarcocystosis in the local communities of Pangkor and Tioman islands, Malaysia, by using antigenic recombinant surface antigens 2 and 3 from Sarcocystis falcatula (rSfSAG2 and rSfSAG3) as the target proteins via Western blot and ELISA assays.
METHODS: SfSAG2 and SfSAG3 genes were isolated from S. falcatula and expressed in Escherichia coli expression system. A total of 348 serum samples [volunteers from both islands (n = 100), non-Sarcocystis parasitic infections patients (n = 50) and healthy donors (n = 100)] were collected and tested with purified SfSAGs in Western blot and ELISA assays to measure the seroprevalence of human sarcocystosis.
RESULTS: None of the sera in this study reacted with rSfSAG2 by Western blot and ELISA. For rSfSAG3, relatively high prevalence of sarcocystosis was observed in Tioman Island (75.5%) than in Pangkor Island (34%) by Western blot. In ELISA, the different prevalence rate was observed between Tioman Island (43.8%) and Pangkor Island (37%). The prevalence rate in other parasitic infections (amoebiasis, cysticercosis, filariasis, malaria, toxocariasis and toxoplasmosis) was 30% by Western blot and 26% by ELISA. Only 8% (by Western blot) and 10% (by ELISA) of healthy donors showed reactivity towards rSfSAG3.
CONCLUSION: This is the first study reporting a seroprevalence of sarcocystosis in Pangkor and Tioman Islands, Malaysia. The combination of Western blot and ELISA is suitable to be used for serodiagnosis of sarcocystosis. With further evaluations, SfSAG3 can potentially be used to confirm infection, asymptomatic screening, surveillance and epidemiological studies.

Matched MeSH terms: Antigens, Surface
Fulltext Hepatitis C core antigen testing to diagnose active hepatitis C infection among haemodialysis patients

Wong XZ, Gan CC, Mohamed R, Yahya R, Ganapathy S, Tan SS, et al.

BMC Nephrol, 2020 11 13;21(1):480.
PMID: 33187498 DOI: 10.1186/s12882-020-02154-4

BACKGROUND: Hepatitis C virus (HCV) infects more than 71 million people worldwide and chronic HCV infection increases the risk of liver cirrhosis and failure. Haemodialysis (HD) is one of the renal replacement therapies with risk of HCV transmission. Anti-HCV antibodies are the serological screening test for HCV infection that does not detect active phase of infection. Majority HCV infected HD patients in Malaysia do not have further HCV RNA performed due to high cost and thus HCV treatment is less frequently offered. HCV Core Antigen (HCV Ag) can potentially be used to diagnose active HCV infection in HD population in comparison to HCV RNA, at lower cost.
METHODS: We conducted a cross-sectional study to assess the correlation between HCV Ag and HCV RNA and to identify the prevalence of active HCV infection among HCV seropositive HD patients from dialysis centres across West Malaysia from July 2019 to May 2020. Pre-dialysis blood was taken and tested for both HCV Ag and HCV RNA tests. HCV Ag was tested with Abbott ARCHITECT HCV Ag test.
RESULTS: We recruited 112 seropositive HD patients from 17 centres with mean age of 54.04 ± 11.62 years, HD vintage of 14.1 ± 9.7 years, and male constitute 59.8% (67) of the study population. HCV Ag correlates well with HCV RNA (Spearman test coefficient 0.833, p 3000 IU/mL, HCV Ag had a higher sensitivity of 95.1% and greater correlation (Spearman test coefficient 0.897, p

Matched MeSH terms: Hepatitis C Antigens
Fulltext An expert review on the use of tenofovir alafenamide for the treatment of chronic hepatitis B virus infection in Asia

Charlton MR, Alam A, Shukla A, Dashtseren B, Lesmana CRA, Duger D, et al.

J Gastroenterol, 2020 Sep;55(9):811-823.
PMID: 32666200 DOI: 10.1007/s00535-020-01698-4

Asia has intermediate-to-high prevalence and high morbidity of hepatitis B virus (HBV) infection. The use of guideline-recommended nucleos(t)ide analogs with high barrier to resistance, such as entecavir (ETV), tenofovir disoproxil fumarate (TDF), and tenofovir alafenamide (TAF), is one of the key interventions for curbing HBV infection and associated morbidity in Asia. However, there are some challenges to the use of ETV and TDF; while ETV is associated with high resistance in lamivudine (LAM)-exposed (especially LAM-refractory) patients; bone and renal safety issues are a major concern with TDF. Hence, a panel of twenty-eight expert hepatologists from Asia convened, reviewed the literature, and developed the current expert opinion-based review article for the use of TAF in the resource-constrained settings in Asia. This article provides a comprehensive review of two large, phase 3, double-blind, randomized controlled trials of TAF versus TDF in HBeAg-negative (study 0108) and HBeAg-positive (study 0110) chronic HBV patients (> 70% Asians). These studies revealed as follows: (1) non-inferiority for the proportion of patients who had HBV DNA

Matched MeSH terms: Hepatitis B e Antigens
Fulltext Absence of 1061C deletion in A2 blood subgroup validated through gene sequencing in the Malaysian population

Anbukarsu, Aruna, Mohd Nazif Samat @ Darawi and Mohd Nazil Salleh

Life Sciences, Medicine and Biomedicine, 2019;3(1):1-6.
MyJurnal

ABO blood grouping is an important antigenic blood typing tools in blood transfusion and organ transplants. Mismatching of blood during transfusion would lead to undesired transfusion reactions. Due to rare occurrence of rare blood group such as A2 subtype, regular blood grouping technique would have missed the identification of blood group. Objectives: In this study, the identification of A2 subgroup using routine serological technique was validated via DNA sequencing technique. Materials and Methods: A total of 656 students participated in this study consist of Malay (87.0 %), Chinese (0.4 %), Indian (11.4 %) and others ethnic group (0.9%) respectively. Monoclonal antisera A, B, AB, D, A1 lectin and H lectin were used to identify the antigen on red blood cells. DNA sequence analysis was applied to examine single nucleotide polymorphisms (SNPs) at position 467 (substitution of C>T) and 1061 (deletion of C) on coding region of ABO gene. Results: Our findings showed of 656 blood samples, 256 (39.0%) were blood group O, 190 (29.0%) were blood group B, 179 (27.3%) were blood group A and 31(4.7%) were blood group AB. The frequency of A1 subgroup is 177 (99.0%) and A2 subgroup is 2 (1.0%). From 179 A blood group, only 2 samples showed negative reaction towards anti-A1 lectin. DNA sequence analysis revealed the SNPs at nucleotide 1061 position in sample 2, however this mutation was absence in sample 1, suggesting presence of another mutation that may result in the A2 phenotype. Conclusion: The current study reported the absence of 1061C deletion in A2 blood group sample among Malaysian population.

Matched MeSH terms: Blood Group Antigens
Fulltext Elucidating lineage-specific myelotoxicity and chromosomal aberration status in hydroquinone- exposed hematopoietic STEM / progenitor cells

Julia Mohd Idris, Zariyantey Abd Hamid, Ng, Khen Eng, Chow, Paik Wah, Salwati Shuib, Mathialagan, Ramya Dewi

Life Sciences, Medicine and Biomedicine, 2018;2(1):14-21.
MyJurnal

Benzene exposure has been associated with hematotoxicity and leukemogenicity. However, the impact of benzene exposure on complex microenvironment of Hematopoetic Stem Cells (HSCs) niche, comprising of HSCs and lineage-specific progenitors remains elusive. Thus, a study on benzene-targeting HSCs niche could uncover mechanism linking benzene to HSCs niche alteration. This study evaluates the lineage-specific responses following exposure to a benzene metabolite, namely hydroquinone (HQ) in targeting HSCs and myeloid-committed progenitors. Freshly isolated murine bone marrow cells (BMCs) were exposed to HQ at series of concentrations (0 – 50 μM) for 24 hours; followed by cell viability analysis using MTT assay. Chromosomal aberration (CA) status was determined using karyotyping analysis. Expression of surface antigen for HSCs (Sca-1) was confirmed by flow cytometer. Lineage-specific myelotoxicity was studied using the colony-forming unit (CFU) assay for the following myeloid progenitors: CFU granulocyte /erythrocyte /macrophage /megakaryocyte (CFU-GEMM), CFU-granulocyte/macrophage (CFU-GM), CFU-granulocyte (CFU-G), CFU-macrophage (CFU-M), CFU-erythroid (CFU-E) and Burst-forming unit erythroid (BFU-E). HQ reduced (p

Matched MeSH terms: Antigens, Surface
Fulltext Reduced red blood cell deformability in Plasmodium knowlesi malaria

Barber BE, Russell B, Grigg MJ, Zhang R, William T, Amir A, et al.

Blood Adv, 2018 02 27;2(4):433-443.
PMID: 29487058 DOI: 10.1182/bloodadvances.2017013730

The simian parasite Plasmodium knowlesi can cause severe and fatal human malaria. However, little is known about the pathogenesis of this disease. In falciparum malaria, reduced red blood cell deformability (RBC-D) contributes to microvascular obstruction and impaired organ perfusion. In P knowlesi infection, impaired microcirculatory flow has been observed in Macaca mulatta (rhesus macaques), unnatural hosts who develop severe and fatal disease. However, RBC-D has not been measured in human infection or in the natural host M fascicularis (long-tailed macaques). Using ektacytometry, we measured RBC-D in adults with severe and non-severe knowlesi and falciparum malaria and in healthy controls. In addition, we used micropipette aspiration to determine the relative stiffness of infected RBCs (iRBCs) and uninfected RBCs (uRBCs) in P knowlesi-infected humans and M fascicularis Ektacytometry demonstrated that RBC-D overall was reduced in human knowlesi malaria in proportion to disease severity, and in severe knowlesi malaria, it was comparable to that of severe falciparum malaria. RBC-D correlated inversely with parasitemia and lactate in knowlesi malaria and HRP2 in falciparum malaria, and it correlated with hemoglobin nadir in knowlesi malaria. Micropipette aspiration confirmed that in humans, P knowlesi infection increased stiffness of both iRBCs and uRBCs, with the latter mostly the result of echinocytosis. In contrast, in the natural host M fascicularis, echinocyte formation was not observed, and the RBC-D of uRBCs was unaffected. In unnatural primate hosts of P knowlesi, including humans, reduced deformability of iRBCs and uRBCs may represent a key pathogenic mechanism leading to microvascular accumulation, impaired organ perfusion, and anemia.

Matched MeSH terms: Antigens, Protozoan
Unraveling the Role of Receptor for Advanced Glycation End Products (RAGE) and Its Ligands in Myasthenia Gravis

Angelopoulou E, Paudel YN, Piperi C

ACS Chem Neurosci, 2020 03 04;11(5):663-673.
PMID: 32017530 DOI: 10.1021/acschemneuro.9b00678

Myasthenia gravis (MG) is an autoimmune T cell-dependent B cell-mediated disorder of the neuromuscular junction (NMJ) characterized by fluctuating skeletal muscle weakness, most commonly attributed to pathogenic autoantibodies against postsynaptic nicotinic acetylcholine receptors (AChRs). Although MG pathogenesis is well-documented, there are no objective biomarkers that could effectively correlate with disease severity or MG clinical subtypes, and current treatment approaches are often ineffective. The receptor for advanced glycation end products (RAGE) is a multiligand cell-bound receptor highly implicated in proinflammatory responses and autoimmunity. Preclinical evidence demonstrates that RAGE and its ligand S100B are upregulated in rat models of experimental autoimmune myasthenia gravis (EAMG). S100B-mediated RAGE activation has been shown to exacerbate EAMG, by enhancing T cell proinflammatory responses, aggravating T helper (Th) subset imbalance, increasing AChR-specific T cell proliferative capacity, and promoting the production of antibodies against AChRs from the spleen. Soluble sRAGE and esRAGE, acting as decoys of RAGE ligands, are found to be significantly reduced in MG patients. Moreover, MG has been associated with increased serum levels of S100A12, S100B and HMGB1. Several studies have shown that the presence of thymic abnormalities, the onset age of MG, and the duration of the disease may affect the levels of these proteins in MG patients. Herein, we discuss the emerging role of RAGE and its ligands in MG immunopathogenesis, their clinical significance as promising biomarkers, as well as the potential therapeutic implications of targeting RAGE signaling in MG treatment.

Matched MeSH terms: Antigens, Neoplasm
An immunodiffusion analysis of strains of Mycobacterium ulcerans isolated in Australia, Malaya, Mexico, Uganda and Zaire

Stanford JL

J Med Microbiol, 1973 Aug;6(3):405-8.
PMID: 4199273
Matched MeSH terms: Antigens, Bacterial
Fulltext Development of solid - based paper strips for rapid diagnosis of Pseudorabies infection

Joon Tam Y, Mohd Lila MA, Bahaman AR

Trop Biomed, 2004 Dec;21(2):121-34.
PMID: 16493404

Pseudorabies (Aujeszky's disease) is an economically significant disease of swine known to cause central nervous disorders, respiratory disease, reproductive failure and mortality in infected pigs. In attempts to eradicate the disease from becoming endemic, early detection is important to prevent further economic losses and to allow for detection and removal of infected pigs in domestic herds. Thus, a rapid and sensitive technique is necessary for the detection of the virus. For rapid and simple examination, an immuno - chromatographic lateral - flow assay system based on immunologic recognition of specific pseudorabies virus antigen was developed by utilising, as signal generator, colloidal gold conjugated to secondary antibody to detect primary or sample antibody in the sera of pseudorabies infected animals. The pseudorabies virus used as a capture antigen in the test strip was first cultivated in VERO cell culture and then purified by sucrose gradient separation to produce the viral protein concentration of 3.8 mg/ml. The standard pseudorabies antigens reacted well with the hyperimmune serum (HIS). The antibody detection system is basically composed of colloidal gold - labelled antibodies fixed on a conjugate pad, and the complementary pseudorabies antigen immobilised onto a nitrocellulose membrane forming capture zone. If the target antibody is present in a specimen, the colloidal gold-labelled antibody will form a complex with the antibody sample. Subsequently, the formed complex will migrate to the capture zone and is then bound to the solid phase via antigen - antibody interaction. As a result, a signal marker is generated by the accumulation of colloidal gold for detection confirmation. The results obtained demonstrated that the optimum combination of pseudorabies antigen needed as the capture reagent and gold conjugate as secondary antibody recognition marker was at a concentration of 0.38mg/ml and at 1:10 dilution factor respectively. The sensitivity of the solid - based test strip towards pseudorabies antibodies was high with a detection limit of 1 to 10,000 - dilution factor. The specificity of the assay was 100% with no cross - reaction being observed with other sera or antibodies. Accurate reading time needed for confirmation of the assay can be completed in 5 min with a whole blood sample of 25 microl. The colloidal gold - labelled antibody is stable at room temperature for 6 months or more (data not shown). Findings from this study indicated that the solid - based test strip assay system provided high sensitivity and specificity for the detection of pseudorabies at low levels of antibody concentration. The assay was rapid, simple, cheap, and does not require any sophisticated equipment. Thus, the solid based test strip will be a useful serological screening technique or for rapid diagnosis of an infectious disease in target populations of animals characterised by heterogeneous antibody responses.

Matched MeSH terms: Antigens
Biocompatible ionic liquids assisted transdermal co-delivery of antigenic protein and adjuvant for cancer immunotherapy

Chowdhury MR, Moshikur RM, Wakabayashi R, Moniruzzaman M, Goto M

Int J Pharm, 2021 May 15;601:120582.
PMID: 33872711 DOI: 10.1016/j.ijpharm.2021.120582

Human skin contains numerous antigen-presenting cells that are a potential target for several immune-based therapies, including vaccination and cancer immunotherapy. However, the outermost layer of the skin-the stratum corneum-acts as a major physical barrier against the permeation of antigens that have a molecular weight > 500 Da. In this study, an ionic liquid-assisted delivery system (ILDS) was developed, which enabled the successful transdermal delivery of an antigenic protein, ovalbumin (OVA), with a toll-like receptor agonist, imiquimod, as an adjuvant, to stimulate a specific immune response. Both the ionic liquids and ILDS were completely biocompatible for topical or transdermal application for therapeutic purposes. The skin permeation of the antigenic protein and adjuvant was found to be significantly enhanced because of the incorporation of a surface-active ionic liquid in the ILDS. An in vivo immunization study showed that there was a high level of OVA-specific IgG antibody production because of the enhanced permeation of the antigen and adjuvant across and into the skin. In a preclusive anticancer study, vaccination through ILDS showed stronger tumor-growth inhibition compared to control group. These results indicated that the ILDS could be a promising strategy for transdermal immunization as future therapeutics.

Matched MeSH terms: Antigens
Fulltext Association between polymorphisms of insulin and insulin receptor gene with childhood obesity in malay population

Christinal Teh Pey Wen, Nurul Adibah Nizam, Abdul Rahman Jamal, Wan Zurinah Wan Ngah, Chong, Pei Nee, Poh, Bee Koon

Jurnal Sains Kesihatan Malaysia, 2016;14(1):5-9.
MyJurnal

Childhood obesity is a global epidemic, which leads to the increasing number of studies on genetic locations associated with obesity-related traits. Polymorphisms of insulin (INS) gene have been shown to be associated with obesity-related phenotypes in Europeans; while insulin receptor (INSR) gene has been associated with energy regulation. Therefore, this study was conducted to investigate the association between the INS (rs689) and INSR (rs3745551) gene polymorphisms with childhood obesity risk in a Malay childhood population. Normal weight (538) and overweight or obese (557) children aged 6-12 years old were genotyped using semi-automated Sequenom iPLEX® Gold. Body mass index (BMI) was calculated from measured body weight and height. The rs689 (T/T: 0.006, A/T: 0.159 and A/A: 0.835) and rs3745551 (G/G: 0.054, A/G: 0.378 and A/A: 0.568) genotype distributions were consistent with Hardy Weinberg equilibrium. The T-minor allele frequency for rs689 was 8.6% and G-minor allele frequency for rs3745551 was 24.3%. Minor allele of INS gene polymorphisms significantly increased risk of obesity among Malay children (sex- and age-adjusted
OR=1.580; 95%CI: 1.134-2.201). However, INSR gene polymorphisms were not significantly associated with childhood obesity. In conclusion, the polymorphisms of INS gene, rather than INSR gene, were associated with childhood obesity in the Malay population.

Matched MeSH terms: Antigens, CD
Fulltext Pathological findings in a mouse model for Coxsackievirus A16 infection

Hooi, Yuan Teng, Ong, Kien Chai, Perera, David, Wong, Kum Thong

Neurology Asia, 2015;20(4):343-347.
MyJurnal

Coxsackievirus A16 (CV-A16) is the leading cause of hand-foot-mouth disease (HFMD), which usually
presents as mild and self-limiting symptoms in young children. Rarely, CV-A16 has been reported
to cause severe and fatal neurological complications but little is known about these complications.
In the present study, 1-day and 7-day old mouse models of CV-A16 were developed using a clinical
strain via subcutaneous inoculation. All infected mice exhibited clinical signs of infection, including
reduced mobility, limb weakness and paralysis between 3 to 6 days post-infection. Pathologically,
the main organs involved were the central nervous system (CNS), skeletal muscles and brown fat. In
the CNS, viral antigens as demonstrated by immunohistochemistry, were localized mainly to neurons
in the brain stem and spinal cord, suggesting that CV-A16 is neurotropic although inflammation is
very mild. The skeletal muscles showed necrosis and myositis due to viral infection as evidenced by
the dense viral antigens. Focal viral antigens were also detected in the brown fat. These preliminary
pathological findings indicate that our mouse models can be further developed to be useful models
for pathogenesis studies, and vaccine and anti-viral drug evaluation.

Matched MeSH terms: Antigens, Viral
Fulltext Feral Cat Globetrotters: genetic traces of historical human-mediated dispersal

Koch K, Algar D, Schwenk K

Ecol Evol, 2016 08;6(15):5321-32.
PMID: 27551385 DOI: 10.1002/ece3.2261

Endemic species on islands are highly susceptible to local extinction, in particular if they are exposed to invasive species. Invasive predators, such as feral cats, have been introduced to islands around the world, causing major losses in local biodiversity. In order to control and manage invasive species successfully, information about source populations and level of gene flow is essential. Here, we investigate the origin of feral cats of Hawaiian and Australian islands to verify their European ancestry and a potential pattern of isolation by distance. We analyzed the genetic structure and diversity of feral cats from eleven islands as well as samples from Malaysia and Europe using mitochondrial DNA (ND5 and ND6 regions) and microsatellite DNA data. Our results suggest an overall European origin of Hawaiian cats with no pattern of isolation by distance between Australian, Malaysian, and Hawaiian populations. Instead, we found low levels of genetic differentiation between samples from Tasman Island, Lana'i, Kaho'olawe, Cocos (Keeling) Island, and Asia. As these populations are separated by up to 10,000 kilometers, we assume an extensive passive dispersal event along global maritime trade routes in the beginning of the 19th century, connecting Australian, Asian, and Hawaiian islands. Thus, islands populations, which are characterized by low levels of current gene flow, represent valuable sources of information on historical, human-mediated global dispersal patterns of feral cats.

Matched MeSH terms: Antigens, Nuclear
Insulin Receptor Isoform Variations in Prostate Cancer Cells

Perks CM, Zielinska HA, Wang J, Jarrett C, Frankow A, Ladomery MR, et al.

Front Endocrinol (Lausanne), 2016;7:132.
PMID: 27733843

Men who develop prostate cancer (PCa) increasingly have one of the co-morbidities associated with a Western lifestyle that are characterized by hyperinsulinemia, hyperglycemia and increased expression of insulin-like growth factors-I (IGF-I) and IGF-II. Each have been associated with poor prognosis and more aggressive cancers that exhibit increased metabolism and increased glucose uptake. The insulin receptor (IR) has two splice isoforms IR-A and IR-B: IR-A has a higher affinity for IGF-II comparable to that for insulin, whereas the IR-B isoform predominantly just binds to insulin. In this study, we assessed alterations in the IR-A and IR-B isoform ratio and associated changes in cell proliferation and migration of PCa cell lines following exposure to altered concentrations of glucose and treatment with IGF-II and insulin. We observed that where IR-B predominated insulin had a greater effect on migration than IGF-II and IGF-II was more effective when IR-A was the main isoform. With regard to proliferation IGF-II was more effective than insulin regardless of which isoform was dominant. We assessed the abundance of the IR isoforms both in vivo and in vitro and observed that the majority of the tissue samples and cell lines expressed more IR-A than IR-B. Alterations in the isoforms in response to changes in their hormonal milieu could have a profound impact on how malignant cells behave and play a role in promoting carcinogenesis. A greater understanding of the mechanisms underlying changes in alternative splicing of the IR may provide additional targets for future cancer therapies.

Matched MeSH terms: Antigens, CD
Fulltext Hepatitis B infection: what the primary care doctors should know

Kew ST, Loh KY

Malays Fam Physician, 2006;1(1):8-10.
MyJurnal

Hepatitis B virus infection is a global public health problem. The prevalence of hepatitis B infection is higher in Asia. The rate of HBsAg carriage in the general population ranges from 2-20%. The WHO has recommended that by the end of 21st century hepatitis B vaccination should be incorporated into routine childhood immunisation programmes for all nations. Vaccination against hepatitis B remains the most important aspect of preventive care. Most importantly hepatitis B vaccination can protect individual from fulminant hepatitis, liver cirrhosis and hepatocellular carcinoma. Primary care physicians must be familiar with the pathology, epidemiological and clinical presentations of this disease and be able to refer patients for appropriate treatment at the tertiary centre.

Matched MeSH terms: Hepatitis B Surface Antigens
Fulltext Association between house dust mite (HDM) sensitisation and asthma control using skin prick test and HDM antigen specific IgE levels in saliva of Malaysian children

Teo, Keat Seong, Cheah, Cheong Wooi, Mak, Joon Wah

International e-Journal of Science, Medicine & Education, 2015;9(2):3-12.
MyJurnal

Background: Sensitisation to house dust mite (HDM) has been regarded as a major risk factor for development of asthma. This study was carried out to investigate the profiles of HDM sensitisation among Malaysian children with asthma.
Material and Methods: The association between HDM sensitisation and control and severity of asthma was investigated. The salivary HDM specific IgE levels were quantified in different grades of control and severity of asthma in 125 unselected asthmatic children aged 5-12 years old attending the asthma follow-up clinic in Hospital Tuanku Ja’afar Seremban. An additional 29 non-asthmatic patients were selected as control. The skin prick test to assess sensitisation to Dermatophagoides pteronyssinus (DP) and Dermatophagoides farinae (DF) was performed on all the participants. A questionnaire regarding the control and severity of asthmatic symptoms of the subject was administered. Saliva was collected by voluntary spitting and ELISA was used to quantify the IgE specific to HDM antigen.
Results: There was a significant association between sensitisation to DP and DF and the control of asthma. The association between DP sensitisation and severity of asthma just failed to reach a significant level although there is a clear trend for this. Significant association was found between DF sensitisation and severity. The HDM specific IgE in the saliva was significantly higher in asthmatic patients compared to non-asthmatic patients. There was no significant difference between the specific IgE levels in patients with different severity status of asthma.
Conclusion: Salivary IgE levels may not be an appropriate indicator of the patients’ asthmatic condition in this study. However, it can be concluded that there is significant association between the sensitisation of HDM and the control and severity of asthma.
Study site: Asthma clinic, Hospital Tuanku Jaafar, Seremban, Negeri Sembilan, Malaysia

Matched MeSH terms: Antigens, Dermatophagoides
Fulltext Nasopharyngeal carcinoma: opportunities for international collaborative research in Malaysia and Hawaii

Armstrong RW

Natl Cancer Inst Monogr, 1977 Dec;47:135-41.
PMID: 349401

Malaysia and Hawaii have several advantages for epidemiologic and laboratory studies on nasopharyngeal carcinoma. Both have multiethnic populations with different incidence rates of nasopharyngeal carcinoma and different life-styles. Malaysia has large populations of Chinese, Malaya, and Indians, and the number of cases of nasopharyngeal carcinoma at any one time is comparatively large. Incidence rates for 1968--72, age-standardized to the World population, for Guangdong hua (Cantonese Chinese) in Malaysia were 24.3/100,000 for males and 12.0/100,000 for females. In Hawaii, the ratio was 12.9/100,000 for males and 6.7/100,000 for females. The small number of cases in Hawaii would require that research in that State be conducted in collaboration with research elsewhere with larger case numbers.

Matched MeSH terms: HLA Antigens
The indirect fluorescent antibody test for malaria

Collins WE, Skinner JC

Am J Trop Med Hyg, 1972 Sep;21(5):690-5.
PMID: 4627546
Matched MeSH terms: Antigens
Fulltext Anaplastic Large Cell Lymphoma Presenting as a Soft Tissue Mass – A Case Report

Siti-Aishah, M.A., Salwati, S., Idrus, M., Rahimah, R., Salmi, A., Leong, C.F., et al.

Medicine & Health, 2008;3(1):69-74.
MyJurnal

Anaplastic large cell lymphoma (ALCL) is a rare tumour, accounting for approximately 3% of adult non-Hodgkin lymphomas.1 Primary systemic ALCL frequently involves both lymph nodes and extranodal sites. A 44-year-old woman presented with a firm, mobile mass in the left iliac fossa region. Ultrasound findings showed a well defined inhomogenous soft tissue mass, measuring 4x4x2.6cm in the deep subcutaneous region. Histopathological examination revealed that the mass was infiltrated by large lymphoid cells with marked nuclear atypia including kidney-shaped nuclei. These neoplastic cells expressed anaplastic lymphoma kinase (ALK) (both nuclear & cytoplasmic staining), CD30 and EMA but not for T-cell (CD45RO and CD3), and B-cell (CD20 & CD79α) markers. Fluorescence in situ hybridization (FISH) analysis showed a t(2;5)(p23;q35) chromosomal translocation. Subsequently the patient developed shortness of the breath and a thoracic computed tomography (CT) scan showed a mass encasing the right upper lobe bronchus. She also had bilateral axillary lymph nodes, measuring 1 cm in diameter (biopsy was not done). The mediastinum and endobronchial region did not show any abnormalities. She received 6 cycles of CHOP chemotherapy and remained disease free 2 years after diagnosis. ALCL, rarely present as a soft tissue tumour and this disease should be included as a differential diagnosis of any soft tissue mass.

Matched MeSH terms: Antigens, CD45

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