Displaying publications 81 - 100 of 811 in total

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  1. Signal transducer and activator of transcription 3 - a promising target in colitis-associated cancer
    Pandurangan AK, Esa NM
    Asian Pac J Cancer Prev, 2014;15(2):551-60.
    PMID: 24568457
    Colorectal cancer (CRC) is the third most common malignancy and fourth most common cause of cancer mortality worldwide. Untreated chronic inflammation in the intestine ranks among the top three high-risk conditions for colitis-associated colorectal cancer (CAC). Signal Transducer and Activator of Transcription 3 (STAT3) protein is a member of the STAT family of transcription factors often deregulated in CRC. In this review, we try to emphasize the critical role of STAT3 in CAC as well as the crosstalk of STAT3 with inflammatory cytokines, nuclear factor (NF)- κB, PI3K/Akt, Mammalian Target of Rapamycin (mTOR), Notch, Wnt/β-catenin and microRNA (MiR) pathways. STAT3 is considered as a primary drug target to treat CAC in humans and rodents. Also we updated the findings for inhibitors of STAT3 with regard to effeects on tumorigenesis. This review will hopefully provide insights on the use of STAT3 as a therapeutic target in CAC.
    Matched MeSH terms: Colonic Neoplasms/drug therapy*
  2. Natural pro-oxidants: an alternative remedy to explore as novel cancer therapeutic agents
    Jothy SL, Oon CE, Sasidharan S
    Asian Pac J Cancer Prev, 2014;15(3):1501.
    PMID: 24606490
    Matched MeSH terms: Neoplasms/drug therapy*
  3. Graphene and graphene oxide as a docking station for modern drug delivery system
    Muthoosamy K, Bai RG, Manickam S
    Curr Drug Deliv, 2014;11(6):701-18.
    PMID: 24909150
    Motivated by the success and exhaustive research on carbon nanotubes (CNTs) based drug delivery, graphene, a two-dimensional; honey-comb crystal lattice has emerged as the rising star in recent years. Graphene is a flat monolayer of carbon atoms that holds many promising properties such as unparalleled thermal conductivity, remarkable electronic properties, and most intriguingly higher planar surface and superlative mechanical strength, which are attractive in biotechnological applications. Delivery of anti-cancer drugs using graphene and its derivatives has sparked major interest in this emerging field. The anti-cancer therapies often pose a limitation of insolubility, administration problems and cell penetration ability. In addition, systemic toxicity caused by lack of selective targeting towards cancer cells and inefficient distribution limits its clinical applications. Graphene nanocomposite is a promising tool to address these drawbacks. This review will focus on various synthesis and functionalization of graphene and graphene oxide for providing better solubility and targeted drug delivery at cancer cells. A more advanced and 'smart' graphene hybrid nanostructures that have several functionalities such as stimulus-response mediated delivery, imaging at release sites as well as transfection into cancer cells are also presented. A brief description on the challenges and perspectives for future research in this field is also discussed.
    Matched MeSH terms: Neoplasms/drug therapy*
  4. Fulltext Phytoagents for cancer management: regulation of nucleic acid oxidation, ROS, and related mechanisms
    Lee WL, Huang JY, Shyur LF
    Oxid Med Cell Longev, 2013;2013:925804.
    PMID: 24454991 DOI: 10.1155/2013/925804
    Accumulation of oxidized nucleic acids causes genomic instability leading to senescence, apoptosis, and tumorigenesis. Phytoagents are known to reduce the risk of cancer development; whether such effects are through regulating the extent of nucleic acid oxidation remains unclear. Here, we outlined the role of reactive oxygen species in nucleic acid oxidation as a driving force in cancer progression. The consequential relationship between genome instability and cancer progression highlights the importance of modulation of cellular redox level in cancer management. Current epidemiological and experimental evidence demonstrate the effects and modes of action of phytoagents in nucleic acid oxidation and provide rationales for the use of phytoagents as chemopreventive or therapeutic agents. Vitamins and various phytoagents antagonize carcinogen-triggered oxidative stress by scavenging free radicals and/or activating endogenous defence systems such as Nrf2-regulated antioxidant genes or pathways. Moreover, metal ion chelation by phytoagents helps to attenuate oxidative DNA damage caused by transition metal ions. Besides, the prooxidant effects of some phytoagents pose selective cytotoxicity on cancer cells and shed light on a new strategy of cancer therapy. The "double-edged sword" role of phytoagents as redox regulators in nucleic acid oxidation and their possible roles in cancer prevention or therapy are discussed in this review.
    Matched MeSH terms: Neoplasms/drug therapy*
  5. Recurrence of a nasopharyngeal carcinoma manifesting as a cerebellopontine angle mass
    Kong MH, Jeevanan J, Jegan T
    Ear Nose Throat J, 2013 Dec;92(12):E11-3.
    PMID: 24366707
    As many as 31% of patients with nasopharyngeal carcinoma present with intracranial extension. Despite this high percentage, extension to the cerebellopontine angle is rare. The mechanism of tumor spread to the cerebellopontine angle is not completely understood. The most likely mechanism is direct extension to the skull base with involvement of the petrous apex and further extension posteriorly via the medial tentorial edge. We report the case of a 46-year-old woman with nasopharyngeal carcinoma who had been treated initially with chemoradiation and subsequently with stereotactic radiosurgery for residual tumor. One year later, she presented with an intracranial recurrence of the nasopharyngeal carcinoma in the cerebellopontine angle; the recurrence mimicked a benign tumor on magnetic resonance imaging. The tumor was ultimately diagnosed as an undifferentiated carcinoma of nasopharyngeal origin. She was treated with palliative chemotherapy.
    Matched MeSH terms: Cerebellar Neoplasms/drug therapy
  6. Fulltext Functional roles of fibroblast growth factor receptors (FGFRs) signaling in human cancers
    Tiong KH, Mah LY, Leong CO
    Apoptosis, 2013 Dec;18(12):1447-68.
    PMID: 23900974 DOI: 10.1007/s10495-013-0886-7
    The fibroblast growth factor receptors (FGFRs) regulate important biological processes including cell proliferation and differentiation during development and tissue repair. Over the past decades, numerous pathological conditions and developmental syndromes have emerged as a consequence of deregulation in the FGFRs signaling network. This review aims to provide an overview of FGFR family, their complex signaling pathways in tumorigenesis, and the current development and application of therapeutics targeting the FGFRs signaling for treatment of refractory human cancers.
    Matched MeSH terms: Neoplasms/drug therapy
  7. The effects of metformin on ovarian cancer: a systematic review
    Dilokthornsakul P, Chaiyakunapruk N, Termrungruanglert W, Pratoomsoot C, Saokaew S, Sruamsiri R
    Int. J. Gynecol. Cancer, 2013 Nov;23(9):1544-51.
    PMID: 24172091 DOI: 10.1097/IGC.0b013e3182a80a21
    OBJECTIVE: The potential therapeutic effects of metformin on several cancers were reported. However, the evidence of the effects of metformin on ovarian cancer is still limited and inconclusive. This systematic review and meta-analysis study aim to summarize the existing evidence of the therapeutic effects of metformin on ovarian cancer.

    METHODS: We performed systematic searches using electronic databases including PubMed and EMBASE until December 2012. Key words included "metformin" AND ("ovarian cancer" OR "ovary tumor"). All human studies assessing the effects of metformin on ovarian cancer were eligible for inclusion. All articles were reviewed independently by 2 authors with a standardized approach for the purpose of study, study design, patient characteristics, exposure, and outcomes. The data were pooled using a random-effects model.

    RESULTS: Of 190 studies retrieved, only 3 observational studies and 1 report of 2 randomized controlled trials were included. Among those studies, 2 reported the effects of metformin on survival outcomes of ovarian cancer, whereas the other 2 reported the effects of metformin on ovarian cancer prevention. The findings of studies reporting the effects on survival outcomes indicated that metformin may prolong overall, disease-specific, and progression-free survival in ovarian cancer patients. The results of studies reporting the effects of metformin on ovarian cancer prevention were meta-analyzed. It indicated that metformin tended to decrease occurrence of ovarian cancer among diabetic patients with the pooled odds ratio of 0.57 (95% confidence interval, 0.16-1.99).

    CONCLUSIONS: Our findings showed the potential therapeutic effects of metformin on survival outcomes of ovarian cancer and ovarian cancer prevention. However, most of the evidence was observational studies. There is a call for further well-conducted controlled clinical trials to confirm the effects of metformin on ovarian cancer survival and ovarian cancer prevention.

    Matched MeSH terms: Ovarian Neoplasms/drug therapy*
  8. Fulltext Association of creatinine clearance with neutropenia in breast cancer patients undergoing chemotherapy with fluorouracil, doxorubicin, and cyclophosphamide (FAC)
    Montoya JE, Luna HG, Morelos AB, Catedral MM, Lava AL, Amparo JR, et al.
    Med J Malaysia, 2013 Apr;68(2):153-6.
    PMID: 23629563
    Fluorouracil, doxorubicin, cyclophosphamide protocol (FAC) is a commonly used regimen for breast cancer due to its proven efficacy, acceptable toxicity, high affordability. While hepatic insufficiency dosing for doxorubicin and fluorouracil have been set, there is paucity of data in the literature on how to reduce doses in renal insufficiency. We sought to determine whether there is an association with pre-chemotherapy creatinine clearance, and the occurrence of clinically significant grade 3 to 5 neutropenia during the course of FAC chemotherapy.
    Matched MeSH terms: Breast Neoplasms/drug therapy
  9. Fulltext Cutaneous side-effects of epidermal growth factor receptor-tyrosine kinase inhibitor (TKI) in the treatment of lung cancer: description and its management
    Ong CK, Tan WC, Chan LC, Abdul Razak M
    Med J Malaysia, 2012 Apr;67(2):222-3.
    PMID: 22822651 MyJurnal
    Epidermal growth factor receptor (EGFR)--tyrosine kinase inhibitors (TKI) like erlotinib and gefitinib have been approved as monotherapy for the treatment of patients with locally advanced or metastatic non small cell lung cancer (NSCLC) after failure of at least one prior chemotherapy regimen. The use of EGFR-TKI is associated with unique and dramatic dermatologic side effects. We report 2 patients with NSCLC developing a typical acneiform (papulo-pustular) eruption shortly after initiation of EGFR-TKI.
    Matched MeSH terms: Lung Neoplasms/drug therapy*
  10. Fulltext The health seeking trajectories of Malaysian women and their husbands in delay cases of breast cancer: a qualitative study
    Yusoff N, Taib NA, Ahmad A
    Asian Pac J Cancer Prev, 2011;12(10):2563-70.
    PMID: 22320956
    The aim of this study was to assess why women delay in getting treatment (i.e. surgery) for breast cancer, as well as to explore on what type of issues are involved in such delay cases. Basic interpretative of qualitative methodology was applied to construct the reality of delay phenomena, and its interaction with social worlds. Six themes were identified: new conception of breast cancer treatment, psychological defenses, health support system, symtomatology experience, model and barriers. The delay issue in breast cancer requires attention as a multidimensional problem as this will facilitate more comprehensive and effective intervention to reduce delay.
    Matched MeSH terms: Breast Neoplasms/drug therapy
  11. Infantile fibrosarcoma of the penis in a 2-year-old boy
    Taib F, Mohamad N, Mohamed Daud MA, Hassan A, Singh MS, Nasir A
    Urology, 2012 Oct;80(4):931-3.
    PMID: 22854139 DOI: 10.1016/j.urology.2012.05.021
    Fibrosarcoma is rare in the pediatric age group. It generally involves the extremities and the trunk but rarely involves the genital area. We report a case of a large fungating infantile fibrosarcoma of the penis in a 2-year-old Malay boy. Partial recovery of the penile structure was achieved after chemotherapy. The difficulty in managing the social and surgical aspect of this case is discussed in our report. To the best of our knowledge, this is the first case report of infantile fibrosarcoma involving the penis in an Asian region.
    Matched MeSH terms: Penile Neoplasms/drug therapy*
  12. Intensity-modulated radiotherapy for nasopharyngeal carcinoma: Penang General Hospital experience
    Phua CE, Tan BS, Tan AL, Eng KY, Ng BS, Malik RA, et al.
    Asian Pac J Cancer Prev, 2012;13(7):3287-92.
    PMID: 22994749
    PURPOSE: To study the overall treatment time (OTT) and acute toxicity of intensity-modulated radiotherapy (IMRT) treatment for nasopharyngeal carcinoma (NPC).

    METHODS: This retrospective study covered all NPC patients who underwent radical IMRT treatment at the Penang General Hospital from June 2011 to February 2012. Patients of any age and stage of disease with histologically proven diagnosis were included. Information was collected on patient demographics, clinical stage, treatment received, including any neoadjuvant and/or concurrent chemotherapy, acute toxity and completion of IMRT within the OTT.

    RESULTS: A total of 26 NPC patients were treated with IMRT during the study period; 88.5% had stage III/IV disease. 45.2% received neo-adjuvant chemotherapy while 50.0% were given concurrent chemo-irradiation. All patients completed the treatment and 92.3% within the 7 weeks OTT. Xerostomia was present in all patients with 92.3% having grade 2. Severe grade III/IV acute toxicity occurred in 73.1% of patients, the commonest of which was oral mucositis (57.6%). This was followed by dysphagia which occurred in 53.8%, skin reactions in 42.3% and weight loss in 19.2%. However, haematological toxicity was mild with only one patient having leucopaenia.

    CONCLUSION: IMRT treatment for NPC is feasible in our center. More importantly, it can be delivered within the 7 weeks OTT in the majority of patients. Severe grade 3/4 toxicity is very common (73.1%) and thus maximal nutritional and analgesic support is required throughout the treatment.

    Matched MeSH terms: Nasopharyngeal Neoplasms/drug therapy
  13. Association of neutropenia onset and severity with chemotherapy regimens and schedules
    Abdul Rasool Hassan B, Yusoff ZB, Bin Othman S
    Asian Pac J Cancer Prev, 2011;12(6):1425-8.
    PMID: 22126475
    INTRODUCTION: Neutropenia, defined as a decrease in the absolute neutrophil count lower than the normal that is < 1500 cell/ ?l, has a detrimental effect on cancer patients' quality of life, also possibly resulting in a reduction in the chemotherapy dose which could lead to an increment in the size of a cancer. There are so many causative factors for neutropenia like hematological disorders, autoimmune diseases and infection, drugs reactions and chemotherapy or radiotherapy. So the main aim of this study is to find the association between chemotherapy drug or regimens, schedule of administration used for treatment of solid cancer diseases with neutropenia onset and severity.

    METHODS: This is an observational retrospective study carried out in a general hospital on 117 solid tumor patients who admitted between January 2003 to December 2006. The main statistical tests used were Chi- square test and Fisher' s Exact test. The significance of the result will be when the P<0.05, while the confidence interval for this study was 95%.

    RESULTS: The highest chemotherapeutic regimen was (5-FU+epirubicin+cyclophosphamide) (47, 40.2%) followed by (gemcitabine+cisplatin) (6, 5.1%) and many others. Majority of the patients receive their chemotherapy schedule of administration was one day schedule (90, 76.9%) followed by more than one day schedule (27, 23.1%).

    CONCLUSION: The doses of these drugs were not high enough to produce a sufficient pharmacological effect to cause bone marrow suppression and lead to neutropenia. Besides the schedule of administration for each drug was long enough to overcome neutropenia also the high uses of granulocyte colony stimulation factor (G-CSF) which will play a major role in reducing the time and severity of neutropenia. All these factors play an important role in giving non- significant association between neutropenia onset and severity with chemotherapeutics drugs and their schedule of administration.

    Matched MeSH terms: Neoplasms/drug therapy*
  14. Fulltext Embedded nanomicro syringe on chip for molecular therapy
    Jalil MA, Suwanpayak N, Kulsirirat K, Suttirak S, Ali J, Yupapin PP
    Int J Nanomedicine, 2011;6:2925-32.
    PMID: 22131837 DOI: 10.2147/IJN.S26266
    A novel nanomicro syringe system was proposed for drug storage and delivery using a PANDA ring resonator and atomic buffer. A PANDA ring is a modified optical add/drop filter, named after the well known Chinese bear. In principle, the molecule/drug is trapped by the force generated by different combinations of gradient fields and scattering photons within the PANDA ring. A nanomicro needle system can be formed by optical vortices in the liquid core waveguide which can be embedded on a chip, and can be used for long-term treatment. By using intense optical vortices, the required genes/molecules can be trapped and transported dynamically to the intended destinations via the nanomicro syringe, which is available for drug delivery to target tissues, in particular tumors. The advantage of the proposed system is that by confining the treatment area, the effect can be decreased. The use of different optical vortices for therapeutic efficiency is also discussed.
    Matched MeSH terms: Neoplasms/drug therapy
  15. Fulltext Recurrent multiple myeloma presenting as a breast plasmacytoma
    Kalyani A, Rohaizak M, Cheong SK, Nor Aini U, Balasundaram V, Norlia A
    Med J Malaysia, 2010 Sep;65(3):227-8.
    PMID: 21939175
    We describe a patient with multiple myeloma, who initially responded to chemotherapy and went into remission. She presented 10 months later with a right breast lump which was confirmed by core biopsy to be a plasmacytoma. Further treatment with radiotherapy, thalidomide and later second line chemotherapy appeared unsuccessful and she showed rapid disease progression with rising paraproteins and new extramedullary plasmacytoma lesions in the forehead, supraclavicular region, nasopharynx, liver, spleen, pancreas and paraaortic lymph nodes.
    Matched MeSH terms: Breast Neoplasms/drug therapy
  16. Fulltext Self management pilot study on women with breast cancer: lessons learnt in Malaysia
    Loh SY, Yip CH, Packer T, Quek KF
    Asian Pac J Cancer Prev, 2010;11(5):1293-9.
    PMID: 21198280
    OBJECTIVE: With increasing survival rates, breast cancer is now considered a chronic condition necessitating innovative care to meet the long-term needs of survivors. This paper presents the findings of a pilot study on self-management for women diagnosed with breast cancer and their implications for Asian health care providers.

    METHODS: A pre-test/ post-test pilot study was conducted to gain preliminary insights into program feasibility and barriers to participation, and to provide justification for a larger trial.

    RESULTS: The study found the 4 week self-management program feasible and acceptable, with a favourable trend in quality of life. The recruitment barriers ranged from competing medical appointments, uncollaborative health providers, linguistic barriers and social-household concerns. Supporting facilitators identified were family, health professionals and fellow participants ("buddies"). Lessons from the study are discussed with regard to Asian health providers.

    CONCLUSION: There is preliminary evidence that self management is a workable and potentially useful model even in an Asians entrenched-hierarchical medical model of care. The initial challenge was breaking down barriers in acceptancee of a collaborative stance. A clinical trial is now warranted to gather more evidence.
    Matched MeSH terms: Breast Neoplasms/drug therapy*
  17. Fulltext Assessment of antiproliferative and antiplasmodial activities of five selected Apocynaceae species
    Wong SK, Lim YY, Abdullah NR, Nordin FJ
    BMC Complement Altern Med, 2011;11:3.
    PMID: 21232161 DOI: 10.1186/1472-6882-11-3
    Studies have shown that the barks and roots of some Apocynaceae species have anticancer and antimalarial properties. In this study, leaf extracts of five selected species of Apocynaceae used in traditional medicine (Alstonia angustiloba, Calotropis gigantea, Dyera costulata, Kopsia fruticosa and Vallaris glabra) were assessed for antiproliferative (APF) and antiplasmodial (APM) activities, and analysed for total alkaloid content (TAC), total phenolic content (TPC) and radical-scavenging activity (RSA). As V. glabra leaf extracts showed wide spectrum APF and APM activities, they were further screened for saponins, tannins, cardenolides and terpenoids.
    Matched MeSH terms: Neoplasms/drug therapy*
  18. Fulltext National Cancer Patient Registry--Haematology Malignancy (NCPR-HM)
    Chang KM, Ong TC
    Med J Malaysia, 2008 Sep;63 Suppl C:66-7.
    PMID: 19227675
    Treatment option of Haematological malignancies has expanded over the last decade. The outcome of treatment is expected to be better compare to previously. However, study of treatment outcome for haematological malignancies has not been carried out in Malaysia. The goal of this study is to measure the treatment outcome in patients with haematological malignancy.
    Matched MeSH terms: Hematologic Neoplasms/drug therapy
  19. Fulltext National Cancer Patient Registry--a patient registry/clinical database to evaluate the health outcomes of patients undergoing treatment for cancers in Malaysia
    Lim GC, Azura D
    Med J Malaysia, 2008 Sep;63 Suppl C:55-6.
    PMID: 19230247
    Cancer burden in Malaysia is increasing. Although there have been improvements in cancer treatment, these new therapies may potentially cause an exponential increase in the cost of cancer treatment. Therefore, justification for the use of these treatments is mandated. Availability of local data will enable us to evaluate and compare the outcome of our patients. This will help to support our clinical decision making and local policy, improve access to treatment and improve the provision and delivery of oncology services in Malaysia. The National Cancer Patient Registry was proposed as a database for cancer patients who seek treatment in Malaysia. It will be a valuable tool to provide timely and robust data on the actual setting in oncology practice, safety and cost effectiveness of treatment and most importantly the outcome of these patients.
    Matched MeSH terms: Neoplasms/drug therapy*
  20. Selectivity of compounds isolated from the leaves of Nerium indicum Mill. on various human cancer cell lines
    Mae SH, Sofia M, Bolhuis RL, Nooter K, Oostrum RG, Subagus W, et al.
    Med J Malaysia, 2008 Jul;63 Suppl A:24-5.
    PMID: 19024965
    The leaves of Nerium indicum Mill. have been utilized traditionally to cure cancer. By Bioassay (BST) guided isolation method, six compounds were isolated from the CHCl3 extract of the leaves. Selectivity of these compounds (in 0.6-12,500 ng/ml) was tested on various human cancer (MCF7, EVSA-T, T47D, H226, IGROV, A498, WIDR, M19, HeLa) and normal (Vero) cells in vitro. Doxorubicin and cysplatin were used as positive controls. The result indicated that NiO2D (5alpha-oleandrin) possessed the best cytotoxic effect on HeLa cells (IC50, 8.38 x10(-6) mM) and NiO2C (16, 17-dehidrodeasetil-5alpha-oleandrin) on A498 cells (IC50, 1.43 x 10(-6) mM). Those two compounds were not cytotoxic to normal cell.
    Matched MeSH terms: Neoplasms/drug therapy*
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