Displaying publications 301 - 320 of 1625 in total

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  1. Rahman HS, Rasedee A, Yeap SK, Othman HH, Chartrand MS, Namvar F, et al.
    Biomed Res Int, 2014;2014:920742.
    PMID: 25025076 DOI: 10.1155/2014/920742
    Zerumbone (ZER) is a naturally occurring dietary compound, present in many natural foods consumed today. The compound derived from several plant species of the Zingiberaceae family that has been found to possess multiple biomedical properties, such as antiproliferative, antioxidant, anti-inflammatory, and anticancer activities. However, evidence of efficacy is sparse, pointing to the need for a more systematic review for assessing scientific evidence to support therapeutic claims made for ZER and to identify future research needs. This review provides an updated overview of in vitro and in vivo investigations of ZER, its cancer chemopreventive properties, and mechanisms of action. Therapeutic effects of ZER were found to be scientifically plausible and could be explained partially by in vivo and in vitro pharmacological activities. Much of the research outlined in this paper will serve as a foundation to explain ZER anticancer bioactivity, which will open the door for the development of strategies in the treatment of malignancies using ZER.
    Matched MeSH terms: Neoplasms/pathology
  2. Hashim H, Rahmat K, Abdul Aziz YF, Chandran PA
    Ear Nose Throat J, 2014 Jun;93(6):E20-3.
    PMID: 24932824
    We report the case of a 30-year-old woman who was referred to us for evaluation of a 2-week history of fever, headache, vomiting, bilateral ptosis, and blurred vision. Imaging obtained by the referring institution had identified a sphenoid sinus mass and diffuse meningeal infiltration, which was thought to represent an infective process. We subsequently identified the mass as a metastatic hepatocellular carcinoma (HCC). The patient was placed under palliative care, and she died 1 month later. Metastases to the sphenoid sinus from any primary source are very rare, and they are generally not considered in the radiologic differential diagnosis. HCC is known to metastasize to the lung, lymph nodes, and musculoskeletal system; again, reported cases of metastasis to the sphenoid sinus are rare. Indeed, our review of the English-language literature found only 6 previously reported cases of sinonasal metastasis of a primary HCC. A diagnosis of a sinonasal metastasis is more difficult in a patient who has no previous diagnosis of a primary malignancy. In presenting this case, our aim is to remind readers of this possibility.
    Matched MeSH terms: Liver Neoplasms/pathology*
  3. Cheong JP, Rahayu S, Halim A, Khir A, Noorafidah D
    Ear Nose Throat J, 2014 Jun;93(6):E1-4.
    PMID: 24932822
    Carcinosarcoma is a highly aggressive and infiltrative tumor. A finding of this tumor in a paranasal sinus is exceedingly rare. We describe the case of a 61-year-old man who presented with a mass on the left side of his face. The mass was excised via a total maxillectomy with a modified radical neck dissection. Histologic analysis identified a mixture of carcinomatous and sarcomatous components. Within 1 month of surgery, the patient developed a sternal metastasis, and he died within a short period of time. The aggressive nature of this tumor and its metastases demand early diagnosis and prompt treatment.
    Matched MeSH terms: Maxillary Sinus Neoplasms/pathology*
  4. Lau TP, Roslani AC, Lian LH, Chai HC, Lee PC, Hilmi I, et al.
    BMJ Open, 2014;4(8):e004930.
    PMID: 25107436 DOI: 10.1136/bmjopen-2014-004930
    To characterise the mRNA expression patterns of early and advanced stage colorectal adenocarcinomas of Malaysian patients.
    Matched MeSH terms: Colorectal Neoplasms/pathology
  5. Abdullah JM, Mustafa Z, Ideris A
    Biomed Res Int, 2014;2014:386470.
    PMID: 25243137 DOI: 10.1155/2014/386470
    Glioblastoma multiforme (GBM), or grade IV glioma, is one of the most lethal forms of human brain cancer. Current bioscience has begun to depict more clearly the signalling pathways that are responsible for high-grade glioma initiation, migration, and invasion, opening the door for molecular-based targeted therapy. As such, the application of viruses such as Newcastle disease virus (NDV) as a novel biological bullet to specifically target aberrant signalling in GBM has brought new hope. The abnormal proliferation and aggressive invasion behaviour of GBM is reported to be associated with aberrant Rac1 protein signalling. NDV interacts with Rac1 upon viral entry, syncytium induction, and actin reorganization of the infected cell as part of the replication process. Ultimately, intracellular stress leads the infected glioma cell to undergo cell death. In this review, we describe the characteristics of malignant glioma and the aberrant genetics that drive its aggressive phenotype, and we focus on the use of oncolytic NDV in GBM-targeted therapy and the interaction of NDV in GBM signalling that leads to inhibition of GBM proliferation and invasion, and subsequently, cell death.
    Matched MeSH terms: Brain Neoplasms/pathology*
  6. Marvibaigi M, Supriyanto E, Amini N, Abdul Majid FA, Jaganathan SK
    Biomed Res Int, 2014;2014:785479.
    PMID: 25136622 DOI: 10.1155/2014/785479
    Breast cancer is among the most frequent types of cancer in women worldwide. Current conventional treatment options are accompanied by side effects. Mistletoe is amongst the important herbal medicines traditionally used as complementary remedies. An increasing number of studies have reported anticancer activity of mistletoe extracts on breast cancer cells and animal models. Some recent evidence suggests that cytotoxic activity of mistletoe may be mediated through different mechanisms. These findings provide a good base for clinical trials. Various studies on mistletoe therapy for breast cancer patients revealed similar findings concerning possible benefits on survival time, health-related quality of life (HRQoL), remission rate, and alleviating adverse reactions to conventional therapy. This review provides an overview of the recent findings on preclinical experiments and clinical trials of mistletoe for its cytotoxic and antitumor activity and its effect on HRQoL in breast cancer patients. Moreover, studies investigating molecular and cellular mechanisms underlying antitumor activity of mistletoe are discussed in this paper. The analyzed trials provided evidence that there might be a combination of pharmacological and motivational aspects mediated by the mistletoe extract application which may contribute to the clinical benefit and positive outcome such as improved HRQoL and self-regulation in breast cancer patients.
    Matched MeSH terms: Breast Neoplasms/pathology
  7. Firoozinia M, Zareian Jahromi M, Moghadamtousi SZ, Nikzad S, Abdul Kadir H
    Int J Med Sci, 2014;11(6):620-5.
    PMID: 24782652 DOI: 10.7150/ijms.8251
    A family of PI3Ks is the lipid kinases, which enhance intracellular pools of phosphatidyl inositol 3,4,5-tri-phosphate (PIP3) through phosphorylating its precursor. Amplifications and deletions of genes, as well as somatic missense of the PIK3CA gene have been described in many human cancer varieties, including of the brain, colon, liver, lung and stomach. Immunohistochemistry and Real-time quantitative PCR tests were used to determine the PIK3CA gene amplification (gene copy number) and to detect protein expression, respectively. The results obtained were analysed and the ratio of PIK3CA to β-actin gene copy number was calculated. Positive gene amplification of PIK3CA was appointed as a copy number of ≥4. Also, PI3K p110α protein expression was scored from 0 to 3+ and the scores of 2+ and 3+ were considered as positive for PI3K p110α protein expression. We studied 50 breast carcinoma samples for PI3K p110α protein expression and PIK3CA gene copy numbers. In general, 36 out of 50 (72%) breast carcinoma samples showed a significant increase in PIK3CA gene amplification. 12 out of 50 (24%) showed positive staining, and 38 out of 50 (76%) showed negative staining for PI3K p110α expression. We have identified no significant relationship between PIK3CA amplification, race (p= 0.630) and histological type (p=0. 731) in breast carcinoma, but correlation of PIK3CA amplification and age showed a significant relationship (p=0. 003) between them. No significant relationship has been identified in correlation of PI3K p110α protein expression compared to age (p=0. 284), race (p=0. 546) and histological type (p=0. 285). Amplification of PIK3CA was frequent in breast carcinoma and occurs in stages of breast carcinoma. Our result shows that there is a relationship between gene amplification and age in breast carcinoma. We suggest that PIK3CA is significant in breast tumorigenesis serve as a prevalent mechanism contributes to the oncogenic activation pathway of PIK3CA in breast cancer.
    Matched MeSH terms: Breast Neoplasms/pathology
  8. Santhi K, Prepageran N, Tang IP, Raman R
    Otol Neurotol, 2015 Feb;36(2):318-22.
    PMID: 24751743 DOI: 10.1097/MAO.0000000000000378
    The objectives of this study were to determine the presence of epithelial migration in patients with postirradiated nasopharyngeal carcinoma (NPC) and to compare the rate of epithelial migration in the tympanic membrane (TM) and the bony external auditory canal (EAC) of postirradiated NPC ears with normal ears by means of the ink dot method.
    Matched MeSH terms: Nasopharyngeal Neoplasms/pathology*
  9. Salahshourifar I, Vincent-Chong VK, Kallarakkal TG, Zain RB
    Oral Oncol, 2014 May;50(5):404-12.
    PMID: 24613650 DOI: 10.1016/j.oraloncology.2014.02.005
    Oral cancer is a multifactorial disease in which both environmental and genetic factors contribute to the aetiopathogenesis. Oral cancer is the sixth most common cancer worldwide with a higher incidence among Melanesian and South Asian countries. More than 90% of oral cancers are oral squamous cell carcinoma (OSCC). The present study aimed to determine common genomic copy number alterations (CNAs) and their frequency by including 12 studies that have been conducted on OSCCs using array comparative genomic hybridization (aCGH). In addition, we reviewed the literature dealing with CNAs that drive oral precursor lesions to the invasive tumors. Results showed a sequential accumulation of genetic changes from oral precursor lesions to invasive tumors. With the disease progression, accumulation of genetic changes increases in terms of frequency, type and size of the abnormalities, even on different regions of the same chromosome. Gains in 3q (36.5%), 5p (23%), 7p (21%), 8q (47%), 11q (45%), 20q (31%) and losses in 3p (37%), 8p (18%), 9p (10%) and 18q (11%) were the most common observations among those studies. However, losses are less frequent than gains but it appears that they might be the primary clonal events in causing oral cancer.
    Matched MeSH terms: Mouth Neoplasms/pathology
  10. Sim KS, Chia FK, Nia ME, Tso CP, Chong AK, Abbas SF, et al.
    Comput Biol Med, 2014 Jun;49:46-59.
    PMID: 24736203 DOI: 10.1016/j.compbiomed.2014.03.003
    A computer-aided detection auto-probing (CADAP) system is presented for detecting breast lesions using dynamic contrast enhanced magnetic resonance imaging, through a spatial-based discrete Fourier transform. The stand-alone CADAP system reduces noise, refines region of interest (ROI) automatically, and detects the breast lesion with minimal false positive detection. The lesions are then classified and colourised according to their characteristics, whether benign, suspicious or malignant. To enhance the visualisation, the entire analysed ROI is constructed into a 3-D image, so that the user can diagnose based on multiple views on the ROI. The proposed method has been applied to 101 sets of digital images, and the results compared with the biopsy results done by radiologists. The proposed scheme is able to identify breast cancer regions accurately and efficiently.
    Matched MeSH terms: Breast Neoplasms/pathology
  11. How SH, Ng TH, Kuan YC, Jamalludin AR, Fauzi AR
    Asia Pac J Clin Oncol, 2015 Sep;11(3):221-7.
    PMID: 24575820 DOI: 10.1111/ajco.12179
    Data on lung cancer survival are lacking in developing countries. Our objectives were to describe the survival of our lung cancer patients and to determine independent prognostic factors affecting survival.
    Matched MeSH terms: Lung Neoplasms/pathology
  12. 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/pathology
  13. Cheah YK, Cheng RW, Yeap SK, Khoo CH, See HS
    Genet. Mol. Res., 2014;13(1):1679-83.
    PMID: 24535903 DOI: 10.4238/2014.January.22.4
    The identification of new biomarkers for early detection of highly recurrent head and neck cancer is urgently needed. MicroRNAs (miRNAs) are small and non-coding RNAs that regulate cancer-related gene expression, such as tumor protein 53 (TP53) gene expression. This study was carried out to analyze TP53 gene expression using real-time PCR and to determine changes in intracellular p53 level by flow cytometry after downregulation of miRNA-181a miRNA inhibitor in the FaDu cell line. TP53 gene expression showed a 3-fold increment and the p53 protein level was also increased in the miRNA-181a-treated cells. In conclusion, miRNA-181a binds to the TP53 gene and inhibits its expression, decreasing the synthesis of p53.
    Matched MeSH terms: Head and Neck Neoplasms/pathology
  14. 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: Nasopharyngeal Neoplasms/pathology*
  15. Norsa'adah B, Nurhazalini-Zayani CG
    Asian Pac J Cancer Prev, 2013;14(11):6955-9.
    PMID: 24377632
    The incidence of hepatocellular carcinoma (HCC) is relatively high in Southeast Asia. Globally, HCC has a high fatality rate and short survival. The objectives of this retrospective cohort study were to review the epidemiology and survival of HCC patients at a tertiary centre in north-east of Peninsular Malaysia. Subjects were adult HCC patients diagnosed by histopathology or radio-imaging. Secondary liver carcinoma was excluded. Kaplan Meier and multiple Cox proportional hazard survival analyses were used. Only 210 HCC cases from years 1987-2008, were included in the final analysis. The number of cases was increasing annually. The mean age was 55.0 (SD 13.9) years with male:female ratio of 3.7:1. Approximately 57.6% had positive hepatitis B virus, 2.4% hepatitis C virus, 20% liver cirrhosis and 8.1% chronic liver disease. Only 2.9% had family history and 9.0% had frequently consumed alcohol. Most patients presented with abdominal pain or discomfort and had hepatomegaly, 47.9% had an elevated α-fetoprotein level of 800 IU/ml or more, 51.9% had multiple tumors and 44.8% involved multiple liver lobes. Approximately 63.3% were in stage 3 and 23.4% in stage 4, and 82.9% did not receive any treatment. The overall median survival time was 1.9 months (95% confidence interval (CI): 1.5, 2.3). The 1-month, 6-month, 1-year and 2-year survival rates were 71.8%, 23.3%, 13.0% and 7.3% respectively. Significant prognostic factors were Malay ethnicity [Adjusted hazard ratio (AHR) 1.6; 95%CI: 1.0, 2.5; p=0.030], no chemotherapy [AHR 1.7; 95%CI: 1.1, 2.5; p=0.017] and Child-Pugh class C [AHR 2.6; 95%CI: 1.4, 4.9; p=0.002]. HCC in our study affected a wide age range, mostly male, in advanced stage of disease, with no treatment and very low survival rates. Primary prevention should be advocated in view of late presentation and difficulty of treatment. Vaccination of hepatitis virus and avoidance of liver toxins are to be encouraged.
    Matched MeSH terms: Liver Neoplasms/pathology
  16. Tsai HJ, Liou B, Li MC
    Malays J Pathol, 2013 Dec;35(2):177-80.
    PMID: 24362481
    Basaloid squamous cell carcinoma (BSCC) of the uterine cervix is a rare malignancy of the female genital tract with a poorer clinical outcome than SCC of the uterine cervix. We report a case of BSCC of the uterine cervix developing rapidly in a young adult Taiwanese. A 35-year-old woman, Para 2, visited the emergency room with severe dizziness, palpitations and sudden excessive vaginal bleeding with hemoglobin of 3.6 g/dl. She had been well and healthy but intermittent vaginal spotting developed for around 6 months previously and was treated as abnormal uterine bleeding by ob-gyn practitioners. She had a repeat cesarean operation 16 months prior to this episode and the last Pap smear showed reactive change 12 months ago at our hospital. On examination, she had an ulcerated, necrotic, and punched-out lesion of 5 cm of the cervix. A cervical biopsy revealed poorly differentiated typical BSCC. Abdominal/pelvic computerized tomography and whole body positron emission tomography confirmed FIGO staging IB2. She responded well to concurrent chemoradiotherapy. Follow-up for the patient is ongoing. This is a rapid developing BSCC of the uterine cervix, although we cannot actually ascertain when it started and how rapidly it progressed.
    Matched MeSH terms: Uterine Cervical Neoplasms/pathology*
  17. Hatta JM, Doss JG, Rogers SN
    Int J Oral Maxillofac Surg, 2014 Feb;43(2):147-55.
    PMID: 24074487 DOI: 10.1016/j.ijom.2013.08.006
    The feasibility of using the Patients Concerns Inventory (PCI) to identify oral cancer patient concerns during consultation in oral and maxillofacial specialist clinics in Malaysia was assessed. A cross-sectional study was conducted using a consecutive clinical sampling technique of all new and follow-up oral cancer patients. Surgeons and counter staff were also recruited. Two-thirds of patients were elderly, 63.9% female, 55.6% Indian, 63.9% of lower-level education, and half had the lowest level household income. Patient status was mostly post-treatment (87.5%) and most were at cancer stage III/IV (63.9%); 59.7% had surgery. Patients took an average 5.9 min (95% CI 5.1-6.7 min) to complete the PCI. Physical domain appeared highest (94.4%); social/family relationship issues (4.2%) were lowest. Significant associations included patient age-personal function (P=0.02); patient education level-emotional status (P=0.05) and social/family relationship issues (P=0.04), and patient TNM staging-personal function (P=0.03). The patients' mean feasibility score for the PCI was 5.3 (95% CI 5.1-5.5) out of 6. Patients (93.1%) and surgeons (90%) found the PCI to be feasible. Only 57.1% of counter staff agreed on the use of the PCI during patient registration. Overall, the PCI was considered feasible, thus favouring its future use in routine oral cancer patient management.
    Matched MeSH terms: Mouth Neoplasms/pathology
  18. Songib NA, Nazri M, Yaakup NA, Nor HM, Sun Z
    Clin Imaging, 2013 Nov-Dec;37(6):1037-42.
    PMID: 24035803 DOI: 10.1016/j.clinimag.2013.08.005
    The aim of this study is to investigate the feasibility of eliminating the nephrographic phase from the four-phase renal computed tomography (CT) imaging to a three-phase protocol without affecting its diagnostic value. Thirty patients undergoing four-phase renal CT scans for assessment of renal lesions (>10 mm) were included in the study. A three-phase renal CT, without nephrographic phase, had similar diagnostic ability to a four-phase renal CT in the detection and characterization of renal lesions. A three-phase CT (plain, corticomedullary, and excretory phase) is therefore adequate in the clinical diagnosis of renal lesions.
    Matched MeSH terms: Kidney Neoplasms/pathology
  19. Hanafiah M, Low SF, Sridharan R, Young B
    BMJ Case Rep, 2013;2013.
    PMID: 24132448 DOI: 10.1136/bcr-2013-201285
    Matched MeSH terms: Spinal Cord Neoplasms/pathology
  20. Chang SW, Abdul-Kareem S, Merican AF, Zain RB
    BMC Bioinformatics, 2013;14:170.
    PMID: 23725313 DOI: 10.1186/1471-2105-14-170
    Machine learning techniques are becoming useful as an alternative approach to conventional medical diagnosis or prognosis as they are good for handling noisy and incomplete data, and significant results can be attained despite a small sample size. Traditionally, clinicians make prognostic decisions based on clinicopathologic markers. However, it is not easy for the most skilful clinician to come out with an accurate prognosis by using these markers alone. Thus, there is a need to use genomic markers to improve the accuracy of prognosis. The main aim of this research is to apply a hybrid of feature selection and machine learning methods in oral cancer prognosis based on the parameters of the correlation of clinicopathologic and genomic markers.
    Matched MeSH terms: Mouth Neoplasms/pathology
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