Displaying publications 1 - 20 of 440 in total

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  1. Lim LY, Ab Majid AH
    J Insect Sci, 2021 Jul 01;21(4).
    PMID: 34297812 DOI: 10.1093/jisesa/ieab047
    Tapinoma indicum (Forel) (Hymenoptera: Formicidae) is a nuisance pest in Asia countries. However, studies on T. indicum are limited, especially in the field of molecular biology, to investigate the species characteristic at the molecular level. This paper aims to provide valuable genetic markers as tools with which to study the T. indicum population. In this study, a total of 143,998 microsatellite markers were developed based on the 2.61 × 106 microsatellites isolated from T. indicum genomic DNA sequences. Fifty selected microsatellite markers were amplified with varying numbers of alleles ranging from 0 to 19. Seven out of fifty microsatellite markers were characterized for polymorphism with the Hardy-Weinberg equilibrium (HWE) and linkage disequilibrium (LD) analysis. All seven microsatellite markers demonstrated a high polymorphic information content (PIC) value ranging from 0.87 to 0.93, with a mean value of 0.90. There is no evidence of scoring errors caused by stutter peaks, no large allele dropout, and no linkage disequilibrium among the seven loci; although loci Ti-Tr04, Ti-Tr09, Ti-Te04, Ti-Te13, and Ti-Pe5 showed signs of null alleles and deviation from the HWE due to excessive homozygosity. In conclusion, a significant amount of microsatellite markers was developed from the data set of next-generation sequencing, and seven of microsatellite markers were validated as informative genetic markers that can be utilized to study the T. indicum population.
    Matched MeSH terms: Polymorphism, Genetic
  2. Mehde AA, Mehdi WA, Yusof F, Raus RA, Zainal Abidin ZA, Ghazali H, et al.
    J Clin Lab Anal, 2018 Jan;32(1).
    PMID: 28205286 DOI: 10.1002/jcla.22173
    BACKGROUND: Nephrolithiasis is one of the causes which lead to chronic kidney disease (CKD). Matrix metalloproteinases (MMPs) are endopeptidases degrading extracellular matrix which correlate with the pathogenesis of atherosclerosis. The current study was designed to analyze the association of (R279Q, C1562T) polymorphism of MMP-9 with nephrolithiasis patients.

    METHODS: Genotyping of MMP-9/R279Q and of MMP-9/C1562T polymorphism were carried out by PCR-based restriction digestion method. Serum level of MMP-9, oxidative stress marker, MDA, and uric acid were measured in patients and control.

    RESULTS: Allele frequencies of the MMP-9/C1562T polymorphism for C and T allele were 71.25% and 28.75% in patients, 87.08% and 12.92% in control respectively. The homozygote TT was more frequent in the nephrolithiasis patients group, while T allele frequency was significantly higher in the nephrolithiasis patients group than in the control group. The patients with CT and TT genotype showed a significant increase in serum MMP-9, Total Oxidant Status (TOS), Oxidative Stress Index (OSI), Malondialdehyde (MDA), and uric acid when compared to CC genotype in patients with nephrolithiasis. The R279Q polymorphism site with regard to the relationship with nephrolithiasis was not significant.

    CONCLUSION: The result indicates that patients with TT genotype had an increased risk of stones. Also, the results demonstrate that TT allele of the C1562T polymorphism in the MMP-9gene is related with an increase of oxidative stress in nephrolithiasis patients and may possibly impose a risk for cardiovascular diseases in patients with TT genotype of MMP-9.

    Matched MeSH terms: Polymorphism, Genetic
  3. Hao Ing Y, Md Salleh MS, Yahya MM, Ankathil R, Abdul Aziz AA
    Asian Pac J Cancer Prev, 2023 Nov 01;24(11):3891-3897.
    PMID: 38019248 DOI: 10.31557/APJCP.2023.24.11.3891
    OBJECTIVE: The aim of this study was to elucidate the association of ATP-binding cassette super-family G member 2 (ABCG2) gene polymorphisms with individual susceptibility to Triple Negative Breast Cancer (TNBC) as well as clinicopathological variables in TNBC patients. Two common polymorphisms in Asian population, ABCG2 34 G>A and 421 C>A was selected in this study.

    METHODS: Blood samples were collected from 75 TNBC patients and 83 controls. Genomic DNA was extracted from blood samples and the SNP genotyping was performed by using PCR-RFLP technique. The genotypes were characterized and grouped into homozygous wildtype, heterozygote and homozygous variant based on the band size. The result was subjected to statistical analysis.

    RESULTS: The A allele and AA genotype of ABCG2 421 C>A had OR of 3.011 (p=0.003, 95% CI: 1.417-6.398) and 9.042 (p=0.011, 95% CI: 1.640-49.837), to develop advanced staging carcinoma respectively. The AA genotype of ABCG2 421 C>A polymorphism was also associated with metaplastic and medullary carcinoma with an OR of 6.429 (p=0.018, 95% CI: 1.373-30.109). A significant association was also found in haplotype 34G/421A of ABCG2 with advanced cancer staging as well as metaplastic and medullary carcinoma with OR of 2.347 (p=0.032, 95% CI: 1.010-5.560) and 2.546 (p=0.008, 95% CI: 1.005-6.447), respectively.  Conclusion: The present study suggests that ABCG2 421 C>A polymorphism was associated with metaplastic and medullary histology and advanced cancer staging in TNBC patients.

    Matched MeSH terms: Polymorphism, Genetic
  4. Alam MA, Juraimi AS, Rafii MY, Hamid AA, Arolu IW, Abdul Latif M
    C. R. Biol., 2015 Jan;338(1):1-11.
    PMID: 25468001 DOI: 10.1016/j.crvi.2014.10.007
    Genetic diversity and relationships among 45 collected purslane accessions were evaluated using ISSR markers. The 28 primers gave a total of 167 bands, among which 163 were polymorphic (97.6%). The genetic diversity as estimated by Shannon's information index was 0.513, revealing a quite high level of genetic diversity in the germplasm. The average number of observed allele, effective allele, expected heterozygosity, polymorphic information content (PIC) and Nei's index were 5.96, 1.59, 0.43, 0.35 and 0.35, respectively. The UPGMA dendrogram based on Nei's genetic distance grouped the whole germplasm into 7 distinct clusters. The analysis of molecular variance (AMOVA) revealed that 89% of total variation occurred within population, while 11% were found among populations. Based on the constructed dendrogram using ISSR markers those accessions that are far from each other by virtue of genetic origin and diversity index (like Ac1 and Ac42; Ac19 and Ac45; Ac9 and Ac23; Ac18 and A25; Ac24 and Ac18) are strongly recommended to select as parent for future breeding program to develop high yielding and stress tolerant purslane variety in contribution to global food security.
    Matched MeSH terms: Polymorphism, Genetic
  5. Mohamed Saini S, Nik Jaafar NR, Sidi H, Midin M, Mohd Radzi A, Abdul Rahman AH
    Compr Psychiatry, 2014 Jan;55 Suppl 1:S76-81.
    PMID: 23410635 DOI: 10.1016/j.comppsych.2012.12.005
    The risk variants have been shown to vary substantially across populations and a genetic study in a heterogeneous population might shed a new light in the disease mechanism. This preliminary study aims to determine the frequency of the serotonin transporter gene polymorphism (5-HTTLPR) in the three main ethnic groups in Malaysia and its association with bipolar disorder.
    Matched MeSH terms: Polymorphism, Genetic/genetics*
  6. Rehman A, Ismail SB, Naing L, Roshan TM, Abdul Rahman AR
    Am J Hypertens, 2007 Feb;20(2):184-9.
    PMID: 17261465 DOI: 10.1016/j.amjhyper.2006.07.015
    BACKGROUND: Data comparing the effect of losartan and perindopril on aortic stiffness among hypertensive subjects without A(1166)C polymorphism was not available.
    METHODS: The short-term and long-term effects of losartan (50 mg) and perindopril (4 mg) on aortic stiffness measured as carotid femoral pulse wave velocity (PWV) were compared in 39 middle-aged Malay subjects with mild-to-moderate hypertension in a 4-month, double-blind, randomized, controlled, parallel-design study.
    RESULTS: Four-month treatment with both drugs showed a significant reduction in blood pressure (BP) (P < .005) and PWV (P < .05) as compared to the baseline. On the other hand 1-month treatment showed a significant reduction in BP only in perindopril group (P < .05) but not in the losartan group. There was no significant reduction in pulse pressure and PWV after 1 month treatment by both drugs. No significant difference was seen in reduction in BP after 1 month and 4 months treatment between the two drugs. Similarly no significant difference was seen in reduction in PWV between the two drugs after 1 month (P = .613) and 4 months (P = .521) of treatment. Reduction in PWV by losartan (r = 0.470) and perindopril (r = 0.457) correlated significantly only with reduction in DBP (P < .05) and remained significant even after controlling for reduction in DBP (P < .05). Reduction in PWV by both losartan and perindopril was independent of reduction in BP by these drugs.
    CONCLUSIONS: These results showed that long-term treatment with losartan shows similar pressure independent reduction in PWV as perindopril among Malay hypertensive subjects with a homogenous "AA" genotype for angiotensin II type 1 receptor and may serve as a suitable alternative to perindopril.
    Matched MeSH terms: Polymorphism, Genetic
  7. Ghazali DM, Rehman A, Abdul Rahman AR
    Clin Chim Acta, 2008 Feb;388(1-2):46-50.
    PMID: 17977523 DOI: 10.1016/j.cca.2007.10.002
    BACKGROUND: Knowledge of candidate gene polymorphisms in a population is useful for a variety of gene-disease association studies, particularly for some complex traits. A single nucleotide variant of the angiotensinogene gene (AGT M235T) and endothelial nitric oxide synthase gene (eNOS G894T) have been associated with hypertension.
    METHOD: A cross-sectional study consisting of 200 hypertensives and 198 age- and sex-matched controls was conducted. Subjects involved in this study were pure Malay for 3 generations. The AGT M235T and eNOS G894T polymorphisms were determined by PCR-RFLP method.
    RESULTS: The distribution of M235T genotype in the population was 3.5% for MM, 30.4% for MT and 66.1% for TT. No significant difference was observed in genotype (chi(2)=1.30, p=0.52) and allele (chi(2)=0.87, p=0.35) frequencies among the 2 study group. In contrast, the distribution of genotypes for G894T was 74.1% for GG, 24.6% for GT and 1.3% for TT, respectively. Similarly, no significant difference was observed in genotype (chi(2)=0.94, p=0.33) and allele (chi(2)=0.60, p=0.44) frequencies between both study groups.
    CONCLUSION: The AGT M235T and eNOS G894T polymorphisms are unlikely to play an important role in the pathogenesis of hypertension in Malays.
    Study site: Outpatient clinic, Hospital Universiti Sains Malaysia (HUSM); government clinics, Kelantan, Malaysia.
    Matched MeSH terms: Polymorphism, Genetic/genetics*
  8. Kasim NB, Huri HZ, Vethakkan SR, Ibrahim L, Abdullah BM
    Biomark Med, 2016 Apr;10(4):403-15.
    PMID: 26999420 DOI: 10.2217/bmm-2015-0037
    Generally, obese and overweight individuals display higher free fatty acid levels, which stimulate insulin resistance. The combination of overweight or obesity with insulin resistance can trigger Type 2 diabetes mellitus (T2DM) and are primary contributing factors to the development of uncontrolled T2DM. Genetic polymorphisms also play an important role as they can impact a population's susceptibility to becoming overweight or obese and developing related chronic complications, such as uncontrolled T2DM. This review specifically examines the genetic polymorphisms associated with overweight and obesity in patients with uncontrolled T2DM. Particularly, gene polymorphisms in ADIPOQ (rs1501299 and rs17300539), LepR (rs1137101 and rs1045895), IRS2 (rs1805092), GRB14 (rs10195252 and rs3923113) and PPARG (rs1801282) have been associated with overweight and obesity in uncontrolled T2DM.
    Matched MeSH terms: Polymorphism, Genetic*
  9. Balraj P, Khoo AS, Volpi L, Tan JA, Nair S, Abdullah H
    Singapore Med J, 2002 Apr;43(4):194-7.
    PMID: 12188064
    Thirty patients with early onset breast cancer or familial breast cancer from Malaysia were analysed for germline mutation in the early onset breast cancer I gene (BRCA1). Direct sequencing of the entire coding region of BRCA1 identified a frameshift mutation, c.5447-5448insC (insC5447) (codon 1776 of exon 21) in a patient aged 32 of the Malay ethnic origin, who had no family history of breast and/or ovarian cancer. Eight polymorphisms (2201C > T, 2430T > C, P871L, E1038G, K1183R, 4427T > C, S1613G and IVS8-57delT) were identified in the samples tested.
    Matched MeSH terms: Polymorphism, Genetic
  10. Zahidin MA, Omar WBW, Taib WRW, Japning JRR, Abdullah MT
    Data Brief, 2018 Dec;21:2609-2615.
    PMID: 30761343 DOI: 10.1016/j.dib.2018.10.158
    Orang Asli is the aboriginal people in Peninsular Malaysia who have been recognized as indigenous to the country and still practicing traditional lifestyle. The molecular interest on the Orang Asli started when the earliest prehistoric migration occurred approximately 200 kya and entering Peninsular Malaysia 50 kya in stages. A total of three groups of Orang Asli present in Peninsular Malaysia, namely, Negrito also known as Semang, Senoi and Proto Malays. Through records, there is no research has been conducted on mtDNA variations in the Semoq Beri population, one of the tribes in Senoi group. In this report, variations of mtDNA were analysed in the population in Hulu Terengganu as an initial effort to establish the genetic characterisation and elucidating the history of Orang Asli expansion in Peninsular Malaysia. An array of mtDNA parameters was estimated and the observed polymorphisms with their respective haplogroups in comparison to rCRS were inferred respectively. The DNA sequences are registered in the NCBI with accession numbers KY853670-KY853753.
    Matched MeSH terms: Polymorphism, Genetic
  11. Joyce-Tan SM, Zain SM, Abdul Sattar MZ, Abdullah NA
    J Diabetes Res, 2016;2016:2161376.
    PMID: 26682227 DOI: 10.1155/2016/2161376
    Genome-wide association studies (GWAS) have been successfully used to call for variants associated with diseases including type 2 diabetes mellitus (T2DM). However, some variants are not included in the GWAS to avoid penalty in multiple hypothetic testing. Thus, candidate gene approach is still useful even at GWAS era. This study attempted to assess whether genetic variations in the renin-angiotensin system (RAS) and their gene interactions are associated with T2DM risk. We genotyped 290 T2DM patients and 267 controls using three genes of the RAS, namely, angiotensin converting enzyme (ACE), angiotensinogen (AGT), and angiotensin II type 1 receptor (AGTR1). There were significant differences in allele frequencies between cases and controls for AGT variants (P = 0.05) but not for ACE and AGTR1. Haplotype TCG of the AGT was associated with increased risk of T2DM (OR 1.92, 95% CI 1.15-3.20, permuted P = 0.012); however, no evidence of significant gene-gene interactions was seen. Nonetheless, our analysis revealed that the associations of the AGT variants with T2DM were independently associated. Thus, this study suggests that genetic variants of the RAS can modestly influence the T2DM risk.
    Matched MeSH terms: Polymorphism, Genetic*
  12. Taheri S, Abdullah TL, Ahmad Z, Abdullah NA
    Biomed Res Int, 2014;2014:631813.
    PMID: 24719878 DOI: 10.1155/2014/631813
    The effects of eight different doses (0, 10, 20, 25, 35, 40, 60, and 100 Gy) of acute gamma irradiation on 44 (three varieties of Curcuma alismatifolia: Chiang Mai Red, Sweet Pink, Kimono Pink, and one Curcuma hybrid (Doi Tung 554) individual plants were investigated. Radiation sensitivity tests revealed that the LD50 values of the varieties were achieved at 21 Gy for Chiang Mai Red, 23 Gy for Sweet Pink, 25 Gy for Kimono Pink, and 28 Gy for Doi Tung 554. From the analysis of variance (ANOVA), significant variations were observed for vegetative traits, flowering development, and rhizome characteristics among the four varieties of Curcuma alismatifolia and dose levels as well as the dose × variety interaction. In irradiated plants, the leaf length, leaf width, inflorescence length, the number of true flowers, the number of pink bracts, number of shoots, plant height, rhizome size, number of storage roots, and number of new rhizomes decreased significantly (P < 0.05) as the radiation dose increased. The cophenetic correlation coefficient (CCC) between genetic dissimilarity matrix estimated from the morphological characters and the UPGMA clustering method was r = 0.93, showing a proof fit. In terms of genetic variation among the acutely irradiated samples, the number of presumed alleles revealed by simple sequence repeats ranged from two to seven alleles with a mean value of 3.1, 4.5, and 5.3 alleles per locus for radiation doses of 0, 10, and 20 Gy, respectively. The average values of the effective number of alleles, Nei's gene diversity, and Shannon's information index were 2.5-3.2, 0.51-0.66, and 0.9-1.3, respectively. The constructed dendrogram grouped the entities into seven clusters. Principal component analysis (PCA) supported the clustering results. Consequently, it was concluded that irradiation with optimum doses of gamma rays efficiently induces mutations in Curcuma alismatifolia varieties.
    Matched MeSH terms: Polymorphism, Genetic*
  13. Mohd Abd Razak MR, Sastu UR, Norahmad NA, Abdul-Karim A, Muhammad A, Muniandy PK, et al.
    PLoS One, 2016;11(3):e0152415.
    PMID: 27023787 DOI: 10.1371/journal.pone.0152415
    Malaysia has a national goal to eliminate malaria by 2020. Understanding the genetic diversity of malaria parasites in residual transmission foci can provide invaluable information which may inform the intervention strategies used to reach elimination targets. This study was conducted to determine the genetic diversity level of P. falciparum isolates in malaria residual foci areas of Sabah. Malaria active case detection was conducted in Kalabakan and Kota Marudu. All individuals in the study sites were screened for malaria infection by rapid diagnostic test. Blood from P. falciparum-infected individuals were collected on filter paper prior to DNA extraction. Genotyping was performed using merozoite surface protein-1 (MSP-1), merozoite surface protein-2 (MSP-2), glutamate rich protein (GLURP) and 10 neutral microsatellite loci markers. The size of alleles, multiplicity of infection (MOI), mean number of alleles (Na), expected heterozygosity (He), linkage disequilibrium (LD) and genetic differentiation (FST) were determined. In Kalabakan, the MSP-1 and MSP-2 alleles were predominantly K1 and FC27 family types, respectively. The GLURP genotype VI (751-800 bp) was predominant. The MOI for MSP-1 and MSP-2 were 1.65 and 1.20, respectively. The Na per microsatellite locus was 1.70. The He values for MSP-1, MSP-2, GLURP and neutral microsatellites were 0.17, 0.37, 0.70 and 0.33, respectively. In Kota Marudu, the MSP-1 and MSP-2 alleles were predominantly MAD20 and 3D7 family types, respectively. The GLURP genotype IV (651-700 bp) was predominant. The MOI for both MSP-1 and MSP-2 was 1.05. The Na per microsatellite locus was 3.60. The He values for MSP-1, MSP-2, GLURP and neutral microsatellites were 0.24, 0.25, 0.69 and 0.30, respectively. A significant LD was observed in Kalabakan (0.495, p<0.01) and Kota Marudu P. falciparum populations (0.601, p<0.01). High genetic differentiation between Kalabakan and Kota Marudu P. falciparum populations was observed (FST = 0.532). The genetic data from the present study highlighted the limited diversity and contrasting genetic pattern of P. falciparum populations in the malaria declining areas of Sabah.
    Matched MeSH terms: Polymorphism, Genetic
  14. Zangeneh FZ, Shoushtari MS, Shojaee S, Aboutorabi E
    Int J Reprod Biomed, 2020 Mar;18(3):165-174.
    PMID: 32309765 DOI: 10.18502/ijrm.v18i3.6712
    Background: Polycystic ovary syndrome (PCOS) is a multifactorial and heterogeneous disease that has a potent inheritable component based on familial clustering. Despite many studies in the genetic field of PCOS, the genes that are involved in the causes of this syndrome have not been thoroughly investigated.

    Objective: The purpose of this study was to establish the occurrence of the Trp64Arg polymorphism of beta3 adrenergic receptor in non-obese women with PCOS.

    Materials and Methods: This cross-sectional study was performed on 100 women with PCOS and normal women as the control group in Imam Khomeini Hospital of Tehran in 2016-2017. Peripheral blood sample (2 cc) was obtained from two groups for genomic DNA based on the gene bank. Polymorphisms were genotyped by of using ADRB3 Trp64Arg. Then the DNA was extracted by genomic kiagen kit. The primer was analyzed for PCR based on gene bank by using Primer3 software and then confirmed by primer Blast tool at NCBI site to conformity to the beta-3 adrenergic receptor gene. The protein changes were assessment by the Clastal W software.

    Results: The sequence analysis presented in NCBI, transcript variant 1, with the code NM_000025.2, shows changes in the amino acid sequence of exon 1 in women with PCOS. Polymorphism in the codon 64 encoding the amino acid tryptophan (W) occurred in the nucleotide c.T190C, which changed the nucleotide T to C and then the amino acid sequence of the tryptophan was altered to arginine pW64R.

    Conclusion: T-C polymorphism is evident in the codon 64 of the adrenergic β3 receptor in patients with PCOS. Therefore, Beta3 adrenergic receptor gene polymorphism (Thr164Ile) associates with this syndrome in nonobese women.

    Matched MeSH terms: Polymorphism, Genetic
  15. Rozak NI, Ahmad I, Gan SH, Abu Bakar R
    Sci Pharm, 2014 07 18;82(3):631-42.
    PMID: 25853073 DOI: 10.3797/scipharm.1406-01
    An insertion/deletion polymorphism in the promoter region of the serotonin transporter gene (5-HTTLPR) and a polymorphism (rs6313) in the serotonin 2A receptor gene (5-HT2A) have previously been linked to smoking behavior. The objective of this study was to determine the possible association of the 5-HTTLPR and 5-HT2A gene polymorphisms with smoking behavior within a population of Malaysian male smokers (n=248) and non-smokers (n=248). The 5-HTTLPR genotypes were determined using the polymerase chain reaction (PCR) and were classified as short (S) alleles or long (L) alleles. The 5HT2A genotypes were determined using PCR-restriction fragment length polymorphisms (PCR-RFLP). No significant differences in the distribution frequencies of the alleles were found between the smokers and the non-smokers for the 5-HTTLPR polymorphism (x(2) = 0.72, P>0.05) or the 5HT2A polymorphism (x(2) = 0.73, P>0.05). This is the first study conducted on Malaysian Malay males regarding the association of 5-HTTLPR and 5HT2A polymorphisms and smoking behavior. However, the genes were not found to be associated with smoking behavior in our population.
    Matched MeSH terms: Polymorphism, Genetic
  16. Heidari F, Vasudevan R, Mohd Ali SZ, Ismail P, Etemad A, Pishva SR, et al.
    PMID: 25002132 DOI: 10.1177/1470320314538878
    Several studies show that the insertion/deletion (I/D) polymorphism of the angiotensin-converting enzyme (ACE) gene has been associated with hypertension in various populations. The present study sought to determine the association of the I/D gene polymorphism among Malay male essential hypertensive subjects in response to ACE inhibitors (enalapril and lisinopril).
    Matched MeSH terms: Polymorphism, Genetic
  17. Sam SS, Teoh BT, Chinna K, AbuBakar S
    Int J Med Sci, 2015;12(2):177-86.
    PMID: 25589894 DOI: 10.7150/ijms.8988
    Dengue virus (DENV) infection usually presents with mild self-limiting dengue fever (DF). Few however, would present with the more severe form of the disease, dengue hemorrhagic fever (DHF) and dengue shock syndrome (DSS). In the present study, the association between IL-12B, IL-10 and TNF-α gene polymorphisms and dengue severity was investigated.
    METHODS: A case-control study was performed on a total of 120 unrelated controls, 86 DF patients and 196 DHF/DSS patients. The polymorphisms in IL-12B, IL-10 and TNF-α genes were genotyped using PCR-RFLP and PCR-sequencing methods.
    RESULTS: A protective association of TNF-α -308A allele and -308GA genotype against DHF/DSS was observed, while TNF-α -238A allele and -238GA genotype were associated with DHF/DSS. A combination of TNF-α -308GA+AA genotype and IL-10 non-GCC haplotypes, IL-12B pro homozygotes (pro1/pro1, pro2/pro2) and IL-12B 3'UTR AC were significantly correlated with protective effects against DHF/DSS. An association between the cytokine gene polymorphisms and protection against the clinical features of severe dengue including thrombocytopenia and increased liver enzymes was observed in this study.
    CONCLUSION: The overall findings of the study support the correlation of high-producer TNF-α genotypes combined with low-producer IL-10 haplotypes and IL-12B genotypes in reduced risk of DHF/DSS.
    KEYWORDS: Infectious disease; cytokine; dengue; genetics; polymorphism.; tropical
    Matched MeSH terms: Polymorphism, Genetic/genetics
  18. Mac Guad R, Zaharan NL, Chik Z, Mohamed Z, Peng NK, Adnan WA
    Transplant Proc, 2016 Jan-Feb;48(1):81-7.
    PMID: 26915847 DOI: 10.1016/j.transproceed.2016.01.001
    BACKGROUND: The aim of this study was to compare the within-patient variability trough levels (Co), dose-adjusted Co, and dose requirements of Prograf and Advograf with CYP3A5 polymorphisms in Malaysia renal transplant recipients.
    METHODS: Stable post-renal transplantation patients switched from Prograf to Advograf were retrospectively identified from University Malaya Medical Centre (n = 28). Co and concomitant tacrolimus dose 6 months preconversion and postconversion were examined. CYP3A5 was genotyped using reverse transcriptase polymerase chain reaction. Wilcoxon signed rank test and Mann-Whitney U test were used to compare Co and dose between formulations and according to genotypes.
    RESULTS: There was a significant difference in the whole-blood tacrolimus Co between the 2 groups (6.16 ± 1.74 ng/mL vs 4.90 ± 1.06 ng/mL; P = .0001). The mean daily maintenance dose of Prograf was 3.9 ± 2.0 mg/kg (0.06 mg/kg/d), which was reduced to 3.3 ± 1.7 mg/d (0.04 mg/kg/d) with Advograf (P = .01). The mean maintenance dose of tacrolimus required for those with CYP3A5*1/*1 (high-expressive) was significantly higher than those with CYP3A5*1/*3 (intermediate-expressive) and CYP3A5*3/*3 (low-expressive) (P < .01) for both formulations. Comparing those with CYP3A5*1/*1, the average dose-adjusted Co was significantly higher in patients with CYP3A5*3/*3 with Advograf (P < .05).
    CONCLUSIONS: The requirement for daily maintenance dose was higher in those with CYP3A5*1/*1 variants in both tacrolimus formulations in the Malaysian patients. Furthermore, those with CYP3A5*3/*3 demonstrated significantly higher dose-adjusted Co with Advograf.
    Matched MeSH terms: Polymorphism, Genetic
  19. Eshkoor S, Ismail P, Rahman S, Moin S, Adon M
    Balkan J. Med. Genet., 2013 Dec;16(2):45-52.
    PMID: 24778563 DOI: 10.2478/bjmg-2013-0031
    The ageing process is influenced by many internal and external factors. The toxic substances in the environment can cause genomic damages to cells, which increase the risk of early ageing. Furthermore, the cytochrome P450 1A2 (CYP1A2) gene polymorphism is a susceptibility factor and may enhance the risk of DNA damage in cells. The current study was carried out to show whether occupational exposure could cause genotoxicity in cells carrying the CYP1A2 gene polymorphism, thus enhancing the likelihood of early ageing. This study was conducted on mechanical workshop workers and a control group by collecting buccal cells from their mouths. Restriction fragment length polymorphism-polymerase chain reaction (RFLP-PCR) was used to identify the CYP1A2 gene polymorphism in the cells. In addition, three extra methods including micronuclei (MN) test, comet assay and real-time PCR (RT-PCR) were applied to determine the effects of gene polymorphisms on DNA damage and ageing from occupational exposure. The results showed that DNA damage in the cells carrying the mutated genotype was higher than the wild genotype. In addition, the difference in MN frequency (p = 0.001) and relative telomere length (p = 0.002) between workers and controls was significant (p <0.05) in the mutated genotype. The findings indicated a possible protective effect of gene polymorphism against early ageing, which was characterized by lack of a significant influence of CYP1A2 gene polymorphism on genetic material in the subjects (p >0.05). It was concluded that the CYP1A2 gene could be a contributing factor to prevent early ageing from occupational exposure.
    Matched MeSH terms: Polymorphism, Genetic
  20. Pramudji H, Demes CM, Dewi K, Tasmini T, Ahmad HS
    Med J Malaysia, 2019 Oct;74(5):400-404.
    PMID: 31649216
    BACKGROUND: Interleukin-6 (IL-6) and C-Reactive Protein (CRP) are mediators of inflammatory responses and increase in people who are obese . The increase of IL-6 and CRP levels is modified by polymorphism of -174 G>C IL-6 gene.

    AIM: The purpose of this study was to investigate the relationship between -174 G>C IL-6 polymorphism gene on the level of IL-6 and CRP in the population of western Indonesia obese who are obese.

    METHODS: In this study, we examined 178 subjects consisting of 89 who are obese with BMI> 25, and controls with BMI between 18.5 and 23. Fasting blood was taken from each subject for the examination of IL-6 and CRP levels by the ELISA method. Determination of genotype -174 G>C IL-6 gene was examined by Polymerase Chain reaction- Restriction Fragment Length Polymorphism (PCR-RFLP) methods.

    RESULTS: The results of this study showed increased levels of IL-6 and CRP in the obese group compared to the controls. In the obese group, CC genotype had higher CRP and lower IL-6 levels than the GC and GG genotypes. The frequency of CC genotype in the obese group was 47.2% compared with 28.1% in controls and this genotype was considered a risk factor for obesity. Carriers of the C genotype as a dominant or a recessive model had greater risk of obesity.

    CONCLUSION: It was concluded that the polymorphism - 174G>C IL-6 gene is a risk factor for obesity and is associated with increased levels of IL-6 and CRP in an obese group of the Western Indonesian ethnic population.

    Matched MeSH terms: Polymorphism, Genetic
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