Displaying publications 1361 - 1380 of 1515 in total

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  1. Tayib S, van Wijk L, Denny L
    Int. J. Gynecol. Cancer, 2011 Dec;21(9):1684-91.
    PMID: 21997172 DOI: 10.1097/IGC.0b013e31822d8ffd
    OBJECTIVES: The objective of the study was to describe the management of gestational trophoblastic neoplasia (GTN), with particular reference to concurrent human immunodeficiency virus (HIV) infection.

    METHODS: This retrospective descriptive study comprised all cases of GTN managed at Groote Schuur Hospital over a 10-year period (1999-2008).

    RESULTS: Seventy-six patients, with a median age of 30 years at presentation, were included in the study. Only 36 patients (47.4%) had known HIV status. Fourteen (18.4%) were HIV positive, and of these, 4 (28.6%) were on antiretroviral treatment (ARV). The mean CD4 count was 142 cells/μL for those on ARV and 543 cells/μL for those not on ARV (P = 0.001). Histologically, 44 patients (58%) had hydatidiform mole, and 21 (28%) had choriocarcinoma. In the remaining 10 cases, a clinical diagnosis was made. Based on the revised International Federation of Gynecology and Obstetrics (FIGO)/modified World Health Organization scoring, 43 patients (56.6%) were low risk, and 33 (43.4%) were high risk. Thirty-eight patients (50%) were staged as FIGO stage I. Of 73 patients who received chemotherapy, 56 (76.7%) achieved complete remission, 9 (12.3%) did not achieve any remission, 7 (9.6%) had a relapse, and 1 (1.4%) was lost to follow-up. Patients who never went into remission had frequent treatment delays due to poor compliance or inadequate blood counts. The overall survival at 60 months was 81.9%. Of the 13 patients (17.1%) who have died, 5 (38.5%) were HIV positive. The overall 5-year survival rates for FIGO stages I, II, III, and IV were 97.4%, 66.7%, 77.8%, and 46.2%, respectively. The overall 5-year survival for HIV-positive patients was 64.3% versus more than 85% for both the HIV-negative and HIV-unknown groups.

    CONCLUSIONS: Apart from more advanced stage, HIV seropositivity and poor compliance with treatment also portend poorer outcome in GTN patients. In HIV-positive patients with poor CD4, little clarity is available whether ARV should be commenced speedily, and the administration of chemotherapy delayed until immune reconstitution occurs.

    Matched MeSH terms: Gestational Trophoblastic Disease/virology*
  2. Ch'ng WC, Saw WT, Yusoff K, Shafee N
    Acta Virol., 2011;55(3):227-33.
    PMID: 21978156
    Enterovirus 71 (EV71) is one of the viruses that cause hand, foot and mouth disease. Its viral capsid protein 1 (VP1), which contains many neutralization epitopes, is an ideal target for vaccine development. Recently, we reported the induction of a strong immune response in rabbits to a truncated VP1 fragment (Nt-VP1t) displayed on a recombinant Newcastle disease virus (NDV) capsid protein. Protective efficacy of this vaccine, however, can only be tested in mice, since all EV71 animal models thus far were developed in mouse systems. In this study, we evaluated the type of immune responses against the protein developed by adult BALB/c mice. Nt-VP1t protein induced high levels of VP1 IgG antibody production in mice. Purified VP1 antigen stimulated activation, proliferation and differentiation of splenocytes harvested from these mice. They also produced significant levels of IFN-γ, a Th1-related cytokine. Taken together, Nt-VP1t protein is a potent immunogen in adult mice and our findings provide the data needed for testing of its protective efficacy in mouse models of EV71 infections.
    Matched MeSH terms: Enterovirus Infections/virology
  3. Rothan HA, Bahrani H, Rahman NA, Yusof R
    BMC Microbiol, 2014;14:140.
    PMID: 24885331 DOI: 10.1186/1471-2180-14-140
    Although there have been considerable advances in the study of dengue virus, no vaccines or anti-dengue drugs are currently available for humans. Therefore, new approaches are necessary for the development of potent anti-dengue drugs. Natural antimicrobial peptides (AMPs) with potent antiviral activities are potential hits-to-leads for antiviral drug discovery. We performed this study to identify and characterise the inhibitory potential of the latarcin peptide (Ltc 1, SMWSGMWRRKLKKLRNALKKKLKGE) against dengue virus replication in infected cells.
    Matched MeSH terms: Dengue/virology
  4. Ohba K, Ichiyama K, Yajima M, Gemma N, Nikaido M, Wu Q, et al.
    PLoS One, 2014;9(5):e97787.
    PMID: 24858917 DOI: 10.1371/journal.pone.0097787
    High prevalence of infection with high-risk human papilloma virus (HPV) ranging from 25 to 100% (average 31%) was observed in breast cancer (BC) patients in Singapore using novel DNA chip technology. Early stage of BC demonstrated higher HPV positivity, and BC positive for estrogen receptor (ER) showed significantly higher HPV infection rate. This unique association of HPV with BC in vivo prompted us to investigate a possible involvement of HPV in early stages of breast carcinogenesis. Using normal breast epithelial cells stably transfected with HPV-18, we showed apparent upregulation of mRNA for the cytidine deaminase, APOBEC3B (A3B) which is reported to be a source of mutations in BC. HPV-induced A3B overexpression caused significant γH2AX focus formation, and DNA breaks which were cancelled by shRNA to HPV18 E6, E7 and A3B. These results strongly suggest an active involvement of HPV in the early stage of BC carcinogenesis via A3B induction.
    Matched MeSH terms: Breast Neoplasms/virology*
  5. Kariminia A, Durier N, Jourdain G, Saghayam S, Do CV, Nguyen LV, et al.
    J Acquir Immune Defic Syndr, 2014 Sep 01;67(1):71-6.
    PMID: 24872132 DOI: 10.1097/QAI.0000000000000227
    OBJECTIVE: To evaluate the value of time-updated weight and height in predicting clinical progression, and immunological and virological failure in children receiving combination antiretroviral therapy (cART).

    METHODS: We used Cox regression to analyze data of a cohort of Asian children.

    RESULTS: A total of 2608 children were included; median age at cART was 5.7 years. Time-updated weight for age z score < -3 was associated with mortality (P < 0.001) independent of CD4% and < -2 was associated with immunological failure (P ≤ 0.03) independent of age at cART.

    CONCLUSIONS: Weight monitoring provides useful data to inform clinical management of children on cART in resource-limited settings.

    Matched MeSH terms: HIV Infections/virology
  6. Meyer JP, Cepeda J, Wu J, Trestman RL, Altice FL, Springer SA
    JAMA Intern Med, 2014 May;174(5):721-9.
    PMID: 24687044 DOI: 10.1001/jamainternmed.2014.601
    Human immunodeficiency virus (HIV) management in correctional settings is logistically feasible, but HIV-related outcomes before release have not been recently systematically examined.
    Matched MeSH terms: HIV Infections/virology
  7. Kim H, Schoofs P, Anderson DA, Tannock GA, Rockman SP
    Vaccine, 2014 May 1;32(21):2474-9.
    PMID: 24631096 DOI: 10.1016/j.vaccine.2014.02.079
    Gene reassortment has proved useful in improving yields of influenza A antigens of egg-based inactivated vaccines, but similar approaches have been difficult with influenza B antigens. Current regulations for influenza vaccine seed viruses limit the number of egg passages and as a result resultant yields from influenza B vaccine seed viruses are frequently inconsistent. Therefore, reliable approaches to enhance yields of influenza B vaccine seed viruses are required for efficient vaccine manufacture. In the present study three stable cold-adapted (ca) mutants, caF, caM and caB derived from seasonal epidemic strains, B/Florida/4/2006, B/Malaysia/2506/2004 and B/Brisbane/60/2008 were prepared, which produced high hemagglutinin antigen yields and also increased viral yields of reassortants possessing the desired 6:2 gene constellation. The results demonstrate that consistent improvements in yields of influenza B viruses can be obtained by cold adaptation following extended passage. Taken together, the three ca viruses were shown to have potential as donor viruses for the preparation of high-yielding influenza B vaccine viruses by reassortment.
    Matched MeSH terms: Ovum/virology
  8. Al-Alimi AA, Ali SA, Al-Hassan FM, Idris FM, Teow SY, Mohd Yusoff N
    PLoS Negl Trop Dis, 2014 Mar;8(3):e2711.
    PMID: 24625456 DOI: 10.1371/journal.pntd.0002711
    Dengue virus is endemic in peninsular Malaysia. The clinical manifestations vary depending on the incubation period of the virus as well as the immunity of the patients. Glucose-6-phosphate dehydrogenase (G6PD) deficiency is prevalent in Malaysia where the incidence is 3.2%. It has been noted that some G6PD-deficient individuals suffer from more severe clinical presentation of dengue infection. In this study, we aim to investigate the oxidative responses of DENV2-infected monocytes from G6PD-deficient individuals.
    Matched MeSH terms: Monocytes/virology*
  9. Ling WY, Razali SM, Ren CK, Omar SZ
    Asian Pac J Cancer Prev, 2012;13(9):4651-4.
    PMID: 23167396
    Organized introduction of prophylactic human papillomavirus (HPV) vaccination can reduce the burden of cervical cancer in developing countries. One of the most effective ways is through a national school-based program. Information on teachers is therefore important since this group may have a disproportionate influence in the success of any implementation.

    OBJECTIVE: To assess teachers' knowledge and perception of HPV, cervical cancer and HPV vaccine prior to commencing a school-based HPV vaccination program in a multiethnic, predominantly Muslim country. Factors associated with acceptability of the vaccine were identified.

    METHOD: A bilingual questionnaire was applied to 1,500 secondary school teachers from 20 urban schools in Malaysia. Data collected were analyzed using SPSS version 17.

    RESULTS: 1,166 questionnaires were returned. From this group, 46.1% had never heard of HPV while 50.9% had never had a pap smear. However, 73.8% have heard of the HPV vaccine with 75% agreeing to have it. 96% considered themselves religious with 79.8% agreeing to have the vaccine.

    CONCLUSIONS: A national school-based HPV immunization program can be implemented effectively in a multiethnic, cultural and religious country despite limited knowledge of HPV-related pathology among teachers. In addition, the perception that religion has a negative influence on such a program is unwarranted.

    Matched MeSH terms: Uterine Cervical Neoplasms/virology
  10. Zandi K, Teoh BT, Sam SS, Wong PF, Mustafa MR, Abubakar S
    PMID: 23140177 DOI: 10.1186/1472-6882-12-214
    Dengue is a serious arboviral disease currently with no effective antiviral therapy or approved vaccine available. Therefore, finding the effective compound against dengue virus (DENV) replication is very important. Among the natural compounds, bioflavonoids derived mainly from plants are of interest because of their biological and medicinal benefits.
    Matched MeSH terms: Dengue/virology
  11. Al-Naggar RA, Bobryshev YV, Al-Jashamy K, Al-Musli M
    Asian Pac J Cancer Prev, 2012;13(8):3835-40.
    PMID: 23098480
    OBJECTIVE: The objective of this study is to determine the practice and associated factors of HPV vaccine among school girls in Melaka, Malaysia.

    METHODOLOGY: A total number of 612 secondary school girls participated in this study. The questionnaire consists of 38 questions which included 3 sections. The first section is about socio- demography. The Second section is about knowledge and awareness of HPV vaccines. The third section is about practices with associated barriers of HPV vaccination. Verbal consent was obtained from all participants, and data were analyzed using SPSS 13.

    RESULTS: A total number of 612 secondary school girl students participated in this study. The mean age was 13.93 ± SD (1.09); minimum age was 13 years old and maximum was 17 years old. The majority of them was Malay, from rural areas and had a family monthly income of RM 3000 or less (91.8%, 53.1%, 69.6%; respectively). The majority of the parents of the school girls were with secondary education level (56.4%). The majority of the participants did not have a family history of cervical cancer (99.0%). The prevalence of HPV vaccination was 77.9% among school girls in Melaka. The majority of the participants were vaccinated in their schools (77.0%). About 69% knew about cervical cancer and 77.6% had ever heard about HPV vaccine. Regarding the factors that influence the practice of uptake HPV vaccine, they were age, race, income, parents' education, knowledge about cervical cancer, heard about HPV vaccine and place of getting the vaccine (p<0.001).

    CONCLUSION: The prevalence of HPV vaccine among school girls is high. Age, race, income, parents' education, knowledge about cervical cancer, heard about HPV vaccine and place of getting the vaccine were the significant factors that influence the practice of uptake HPV vaccine among school girls.

    Matched MeSH terms: Papillomavirus Infections/virology
  12. Yusoff AF, Mustafa AN, Husaain HM, Hamzah WM, Yusof AM, Harun R, et al.
    BMC Infect Dis, 2013 May 08;13:211.
    PMID: 23656634 DOI: 10.1186/1471-2334-13-211
    BACKGROUND: The aims of the study were to assess the risk factors in relation to cross border activities, exposure to mosquito bite and preventive measures taken.An outbreak of chikungunya virus (CHIKV) infection in Malaysia has been reported in Klang, Selangor (1998) and Bagan Panchor, Perak (2006). In 2009, CHIKV infection re-emerged in some states in Malaysia. It raises the possibilities that re-emergence is part of the epidemics in neighbouring countries or the disease is endemic in Malaysia. For this reason, A community-based case control study was carried out in the state of Kelantan.

    METHODS: Prospective case finding was performed from June to December 2009. Those who presented with signs and symptoms of CHIKV infection were investigated. We designed a case control study to assess the risk factors. Assessment consisted of answering questions, undergoing a medical examination, and being tested for the presence of IgM antibodies to CHIKV. Descriptive epidemiological studies were conducted by reviewing both the national surveillance and laboratory data. Multivariable logistic regression analysis was performed to determine risk factors contributing to the illness. Cases were determined by positive to RT-PCR or serological for antibodies by IgM. CHIKV specificity was confirmed by DNA sequencing.

    RESULTS: There were 129 suspected cases and 176 controls. Among suspected cases, 54.4% were diagnosed to have CHIKV infection. Among the controls, 30.1% were found to be positive to serology for antibodies [IgM, 14.2% and IgG, 15.9%]. For analytic study and based on laboratory case definition, 95 were considered as cases and 123 as controls. Those who were positive to IgG were excluded. CHIKV infection affected all ages and mostly between 50-59 years old. Staying together in the same house with infected patients and working as rubber tappers were at a higher risk of infection. The usage of Mosquito coil insecticide had shown to be a significant protective factor. Most cases were treated as outpatient, only 7.5% needed hospitalization. The CHIKV infection was attributable to central/east African genotype CHIKV.

    CONCLUSIONS: In this study, cross border activity was not a significant risk factor although Thailand and Malaysia shared the same CHIKV genotype during the episode of infections.

    Matched MeSH terms: Alphavirus Infections/virology*
  13. Ghrici M, El Zowalaty M, Omar AR, Ideris A
    Int J Mol Med, 2013 Mar;31(3):525-32.
    PMID: 23337979 DOI: 10.3892/ijmm.2013.1244
    Newcastle disease virus (NDV) AF2240 Malaysian strain is a very virulent avian virus. NDV strain AF2240 was previously demonstrated to induce apoptosis in human breast carcinoma MCF-7 cells. However, at which stage of the NDV life cycle apoptosis is induced and whether NDV replication and protein synthesis are involved in apoptosis induction have yet to be determined. In the present study, we investigated the time course of NDV strain AF2240 nucleoprotein (NP) gene expression and the early apoptotic signs in the form of activation of caspase-8 and mitochondrial transition pore opening. In addition, the induction of apoptosis by both ultraviolet-inactivated and cycloheximide-treated NDV-infected MCF-7 cells were examined. Our findings showed that NDV strain AF2240 induced apoptosis at 1 h post-infection (pi) through activation of mitochondrial transition pore opening and at 2 h through activation of caspase-8, while the NP gene was expressed at 6 h pi. The induced apoptosis was independent of both virus replication and protein synthesis. In conclusion, NDV strain AF2240 induces apoptosis at an early stage of its life cycle, possibly during virus binding or fusion with the cell membrane. The mitochondrial-related pathway may be the central activator in NDV strain AF2240-induced apoptosis.
    Matched MeSH terms: Breast Neoplasms/virology
  14. Ng KT, Ong LY, Takebe Y, Kamarulzaman A, Tee KK
    J Virol, 2012 Oct;86(20):11405-6.
    PMID: 22997423
    We report here the first novel HIV-1 circulating recombinant form (CRF) 54_01B (CRF54_01B) isolated from three epidemiologically unlinked subjects of different risk groups in Malaysia. These recently sampled recombinants showed a complex genome organization composed of parental subtype B' and CRF01_AE, with identical recombination breakpoints observed in the gag, pol, and vif genes. Such a discovery highlights the ongoing active generation and spread of intersubtype recombinants involving the subtype B' and CRF01_AE lineages and indicates the potential of the new CRF in bridging HIV-1 transmission among different risk groups in Southeast Asia.
    Matched MeSH terms: HIV Infections/virology*
  15. Lu Y, Jacobson DL, Ashworth LA, Grand RJ, Meyer AL, McNeal MM, et al.
    Am J Gastroenterol, 2009 Feb;104(2):444-53.
    PMID: 19174786 DOI: 10.1038/ajg.2008.120
    Patients with inflammatory bowel disease (IBD) frequently receive immunosuppressive therapy. The immune response in these patients to vaccines has not been well studied. We conducted a prospective, open label study to evaluate the serologic response to influenza vaccine in children with IBD.
    Matched MeSH terms: Inflammatory Bowel Diseases/virology
  16. Wong LP
    Vaccine, 2009 Feb 25;27(9):1410-5.
    PMID: 19150379 DOI: 10.1016/j.vaccine.2008.12.045
    This qualitative study used focus group discussions (FGDs) to evaluate information needed in order to make informed human papillomavirus (HPV) vaccination decision, opinion on the most acceptable public education messages, and channel of delivery in a multiethnic, multicultural and multireligion country. A total of 19 FGDs were conducted among mothers of eligible vaccinees, young women eligible for the vaccine, and men. Messages that carry accurate information about HPV-cervical cancer link, the HPV preventive vaccines and at the same time minimize the stigma of a sexually transmitted infection (STI) vaccine were preferred. Educational messages for future HPV educational intervention were developed and methods to effectively convey to the public the need for HPV vaccination were identified. The findings serve as a basis for future intervention to develop research-based communication materials and strategies.
    Matched MeSH terms: Uterine Cervical Neoplasms/virology
  17. Razali SM
    Trop Doct, 2008 Apr;38(2):109-10.
    PMID: 18453507 DOI: 10.1258/td.2007.070001
    The prevalence of HIV/AIDS among drug addicts in Malaysia is high, especially among intravenous drug users. The present treatment and rehabilitation of drug addiction is considered as a failure. The government finally decided to start on Drug Substitution Therapy in early 2005 as an effort to prevent the spread of HIV/AIDS in the country.
    Matched MeSH terms: HIV Infections/virology
  18. Zaidah AR, Chan YY, Asma HS, Abdullah S, Nurhaslindawati AR, Salleh M, et al.
    PMID: 18564692
    This cross-sectional study determined the prevalence of cryptosporidiosis in HIV-infected patients using polymerase chain reaction (PCR). Stool specimens were collected from HIV infected patients who were admitted to Hospital Raja Perempuan Zainab II, Kota Bharu, Malaysia, for various indications from December 2004 to December 2005. A modified acid-fast stain was performed on the direct stool smears, then the stool specimens were further tested using nested PCR targeting the 18S rRNA gene of Cryptosporidium parvum, with a built-in internal control (IC). Out of 59 samples, 11 were positives. Nested PCR identified a total of nine samples (16%) compared to microscopy, which identified only three samples. All PCR negative results showed IC amplicons, suggesting that these samples were true negatives and were not due to inhibition of PCR. This study highlights the importance of molecular diagnosis in determining the true prevalence and epidemiology of C. parvum.
    Matched MeSH terms: Cryptosporidiosis/virology
  19. Tay SK, Tay YK
    Aust N Z J Obstet Gynaecol, 2009 Jun;49(3):323-7.
    PMID: 19566569 DOI: 10.1111/j.1479-828X.2009.01000.x
    To investigate the prevalence of high-risk human papillomavirus (HPV) and its associated cytological abnormalities among women attending cervical screening clinics in southern Malaysia and Singapore.
    Matched MeSH terms: Cervix Uteri/virology*
  20. Wolfe N
    Sci. Am., 2009 Apr;300(4):76-81.
    PMID: 19363924
    Matched MeSH terms: Pan troglodytes/virology
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