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Search Results: 1 - 6 of 6 matches for " Oluwadayo Oluwadara "
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Biomarkers for early detection of high risk cancers: From gliomas to nasopharyngeal carcinoma
Francesco Chiappelli,Oluwadayo Oluwadara
Bioinformation , 2009,
Abstract: Nasopharyngeal carcinoma (NpC) is a malignant disease associated with Epstein-Barr virus infection, and often diagnosed at an advanced stage. This significantly curtails patient survival. We hypothesize that a panel of biomarkers can be assembled to assess NpC incidence, early detection, and tumor progression during therapeutic intervention. Our thesis rests on a model of successfully predicting high-risk gliomas by means of a carefully crafted panel of molecular mitotic biomarkers (i.e., securin, survivin and MCM2). The strategy we propose holds strong promise for prevention and cure of NpC. The approach we propose seeks to identify certain biomarkers from viral materials, patient tissues and assessment of related diseases, whose signatures, taken together, will be endowed with some degree of congruency, or sense of a coordinated language (i.e., “votes”). Biomarker “voting” will then permit to outline a broad coordinated molecular map for the molecular and epigenetic characterization of each individual patient’s NpC tumor. We will draw on the process of contrasting biomarkers in health and disease, which rests on the auto-proteomic concept particularly relevant in high-risk cancer individuals, such as is the case for NpC. In brief we defend, current advances in human proteome profiling proffers the possibility of having individual baseline proteomic profiles using local body fluids (e.g., saliva, nasal secretions, sputum) or systemic fluids (e.g., plasma, serum, cerebrospinal fluid) to unravel a personalized molecular map for high-risk NpC individuals. Regular check-up will monitor for new or impending manifestations of NpC, and provide a secure assessment of incidence and early detection.
Immune surveillance of nasopharyngeal carcinoma (NpC)
Oluwadayo O Oluwadara,Andre Barkhordarian,Luca Giacomelli,Xenia Brant
Bioinformation , 2011,
Abstract: In the U.S., nasopharyngeal carcinoma (NpC) kills >7,600 each year. Deaths are predominantly among adult men, and in most cases, early detection and treatment can save lives. Despite the annual spending of approximately 3.2 billion dollars on head and neck cancer research, NpC remains a neglected disease since its fatality rates are among the lowest nation wide. The relative survival rates from NpC have not improved in the U.S. in the last 20 years. Infection with Epstein Barr Virus (EBV) is an important co-factor in the etiology of NpC. In other regions of the word (e.g., South-East Asia, Latin America), EBV infection and NpC-related prevalence and mortality are substantially higher and more alarming. Epidemiological data indicate high prevalence of EBV infection and increased risk for NpC among Central and South American and Asian immigrants in the U.S., and also predict a sharp increase in NpC incidence in the next decade. To face this emerging threat, it is important to develop and validate novel modes of detection and intervention for NpC. To this end, we characterized the proteomic signature of NpC, and of the tumor infiltrating lymphocytes of the CD8+, activated (CD38+, mTOR+) and regulatory immune cell (FoxP3+) phenotype. Paraffinized biopsies were processed, and tissue microarrays constructed and tested by immunohistochemistry and tri-immunohistofluorescence for a battery of signaling markers, including AKT and PI3K, in conjunction with EBV status and ANKRD11, an NpC susceptibility biomarker. Microphotographs, analyzed and quantified by confocal microscopy and fractal analysis, suggest new avenues for immunotherapies of NpC.
The role of the microenvironment in tumor immune surveillance
Oluwadayo Oluwadara,Luca Giacomelli,Xenia Brant,Russell Christensen4
Bioinformation , 2011,
Abstract: The evidence appears compelling that the microenvironment, and associated biological cellular and molecular factors, may contribute to the progression of a variety of tumors. The effects of the microenvironment may directly influence the plasticity of T cell lineages, which was recently discussed (O’Shea & Paul, 2010 ). To review the putative role of the microenvironment in modulating the commitment of tumor immune surveillance, we use the model of oral premalignant lesions.
LCK, survivin and PI-3K in the molecular biomarker profiling of oral lichen planus and oral squamous cell carcinoma
Oluwadayo Oluwadara,George Kossan,Raisa Avezova,Francesco Chiappelli
Bioinformation , 2009,
Abstract: T cell signaling is critical in oral lichen planus (OLP) based on the pathogenesis of this chronic inflammatory autoimmune mucocutaneous lesion. Lck plays a key role in T cell signaling; ultimately this signaling affects other targets such as PI-3K. Excessive activity in PI-3K inhibits apoptosis and promotes uncontrolled cell growth. Molecular biomarker profiling in OLP, Chronic Interface Mucosities (CIM), Epithelial Dysplasia (EpD) and Oral Squamous Cell Carcinoma (SCCA) with application of the principle of biomarker voting may represent a new frontier in the diagnosis, assessment and the arguable debate of OLP transformation to cancer. The presence of Lck, PI-3K and Survivin, a cancer specific anti-apoptotic protein was assessed, using immunohistochemistry and tissue micro-array on patient samples, in OLP, SCCA, CIM and EpD. Lck expression was very high in 78.6 % of OLP patients compared to 3.7% in SCCA; PI-3K was high in 63% of SCCA, 100% of EpD, and 35.7% OLP cases. Survivin was high in 64.3% of OLP cases, 96.3% of SCCA, and 100% of EpD. CIM cases may be slightly different molecularly to OLP. Taken together, our data suggest that biomarker protein voting can be effectively used to isolate high-risk OLP cases. Specifically, we show data with four remarkable cases demonstrating that molecular factors are predictive of histopathology. We conclude that it is safer to treat OLP as premalignant lesions, to adopt aggressive treatment measure in histopathologic described well and moderately differentiated SCCA, and to monitor progress of these diseases molecularly using individualized auto-proteomic approach. The use of Lck inhibitors in OLP management needs to be investigated in the future.
Anti-flammatory and analgesic properties of the rhizome extract of zingiber officinale
Y Raji, US Udoh, OO Oluwadara, OS Akinsomisoye, O Awobajo, K Adeshoga
African Journal of Biomedical Research , 2003,
Enhancement of cutaneous wound healing by methanolic extracts of ageratum conyxoides in the wistar rat
OW Oladejo, IO Imosemi, FC Osuagwu, OO Oluwadara, A Aiku, O Adewoyin, OE Ekpo, OO Oyedele, EEU Akang
African Journal of Biomedical Research , 2003,
Abstract: In a bid to test the wound healing effect of a crude methanolic extract of Ageratum conyzoides (Linn.), 20 animals were divided into two groups of ten animals each representing control and experimental groups. Each animal had a 2cm x 2cm area of skin on the right dorsolateral flank area marked and excised. The resulting area of skin wound in the experimental group was dressed with crude methanolic extract of Ageratum conyzoides at a five daily interval while the animals in the control group were dressed with normal saline at the same interval. The wound area was measured at the tenth post-operative day for animals in both groups and the percentage wound contraction calculated. Sample of granulation tissues and end scar obtained from these animals and prepared by routine paraffin wax method. Fibroblast and blood vessel counts were determined in both groups. The result showed a significant increase in the percentage wound contraction at day 10 in the experimental group compared with the control (82.3 ± 1.6 % vs 55.0 ± 4.2 %), P < 0.05. The wound of animals in both groups showed excellent granulation tissue formation and minimal signs of wound infection. There was a significant reduction in the mean fibroblast count in the experimental group compared with the control (44.2 ± 5.8/ high power field vs 90.2 ± 17. 4 / high power field),P < 0.05. The exact significance of this cannot however be determined. There was no significance difference in the vessel count. It was concluded that extract of Ageratum conyzoides has a better wound healing enhancing action compared with normal saline treated controls. This effect may be due to the antimicrobial properties of Ageratum conyzoides
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