Beara I.N.,University of Novi Sad |
Lesjak M.M.,University of Novi Sad |
Orcic D.Z.,University of Novi Sad |
Simin N.T.,University of Novi Sad |
And 3 more authors.
LWT - Food Science and Technology | Year: 2012
The present study was designed to define the phenolic profile, antioxidant, anti-inflammatory and cytotoxic activity of Plantago altissima L., which has never been studied before and to compare it with closely-related, renowned, well-studied Plantago lanceolata L. The presence and content of 44 phenolics in methanol extracts were studied using LC-MS/MS. A similar qualitative composition including dominant compounds as p-hydroxybenzoic, vanillic, gallic and chlorogenic acid, besides apigenin, luteolin and luteolin-7-O-glucoside was found between both extracts. Antioxidant activity of extracts was determined using several assays. All results of these tests were comparable to butylated hydroxytoluene, a well-known synthetic antioxidant. Anti-inflammatory potential was studied by means of cyclooxygenase-1 (COX-1) and 12-lipoxygenase (12-LOX) inhibitory activity. Activity of P. altissima towards COX-1/12-LOX inhibition (IC 50 = 4.4 and 3.6 mg/mL, respectively) was inferior to activity of P. lanceolata (IC 50 = 2.0 and 0.8 mg/mL, respectively). Treatment of four cell lines resulted in a considerable dose-dependent inhibition of cell growth, where P. lanceolata exerted a stronger effect (IC 50 = 172.3, 142.8, 405.5 and 551.7 μg/mL for HeLa, MCF7, HT-29 and MRC-5 cell lines, respectively). To conclude, P. altissima showed certain bio-potential, but was clearly inferior to P. lanceolata. © 2012 Elsevier Ltd.
Cetojevic-Simin D.D.,Oncology Institute of Vojvodina
Journal of medicinal food | Year: 2010
In this study we investigated antioxidative and antiproliferative activity of different horsetail (Equisetum arvense L.) extracts. The antioxidative activity was measured by the electron spin resonance (ESR) spectroscopy-spin trapping method. The influence of different horsetail extracts during lipid peroxidation of (1) sunflower oil induced by the lipophilic azo-initiator 4,4'-azobis(4-cyanovaleric acid) and (2) soybean phosphatidylcholine liposomes induced by the hydrophilic azo-initiator 2,2'-azobis(2-amidinopropane) dihydrochloride was studied. Antiproliferative activity was measured using the sulforhodamine B colorimetric assay on the human cancer cell lines HeLa, HT-29, and MCF7. The results of ESR analysis confirmed that the extracts investigated suppressed the formation of lipid peroxyl radicals in both systems investigated in a dose-dependent manner. The results indicate that n-butanol, methanol, ethyl acetate, and water extracts had significant peroxyl radical scavenging activity. Extracts inhibited cell growth that was dependent on cell line, type of extract, and extract concentration. Ethyl acetate extract exhibited the most prominent antiproliferative effect, without inducing any cell growth stimulation on human tumor cell lines. The results obtained suggest that the horsetail extracts could be used as an easily accessible source of natural antioxidants and as potential phytochemicals.
Mihailovic J.,Oncology Institute of Vojvodina
Archive of Oncology | Year: 2012
The diagnostic imaging procedures that have a role in detection of malignant thyroid tissue are radioiodine (131I) diagnostic whole-body scintigraphy (WBS), neck ultrasound, and CT and MRI for evaluation of the mediastinal area. Despite excellent morphologic characterization of metastatic nodal recurrences, MRI cannot reliably make a differentiation between benign and malignant lymph nodes. Although it detects enlarged metastatic lymph nodes, there are also many small nodal metastases that are usually missed. In one-third of patients with well differentiated thyroid carcinoma, there are carcinomas with dedifferentiated tumor cells: Metastatic tissue may not concentrate radioiodine well; thus 131I-WBS is negative despite elevated thyroglobulin (Tg) levels. Although MRI helps in detection of these non-iodine avid metastases, FDG PET/CT can perform more effectively. Due to its high glycolytic rate, changes in glucose transport systems and hexokinase activity, [18F] fluorodeoxyglucose (FDG) accumulates in malignant tissue and is useful for identification of distant metastases in these patients. Iodine positive metastases are often negative with FDG-PET imaging while iodine negative metastases exhibit increased FDG-uptake. If a metastatic lesion is identified by FDG positron emission tomography/ computed tomography (PET/CT), the usual approach is to first send the patient to surgery for removal of neoplastic tissue, if possible. This is followed by re-treatment with 131I therapy after tumor redifferentiation with retinoic acid. In a limited number of patients, iodine negative thyroid cancer may express somatostatin receptors and radiopeptide therapy may be utilized. FDG PET/CT is a hybrid imaging diagnostic tool which helps in detection of non-iodine avid metastases. It has a role in exact localization of recurrences which will assist in the decision to remove the malignant tissue surgically. © 2012, Oncology Institute of Vojvodina, Sremska Kamenica.
Mandic A.,Oncology Institute of Vojvodina
Journal of B.U.ON. | Year: 2012
Human papillomavirus (HPV) is one of the most common sexually transmitted diseases worldwide. Cervical and anal intraepithelial neoplasia, genital warts, and recurrent respiratory papillomatosis such as cervical and other anogenital cancers, are HPV-associated diseases. Prophylactic HPV vaccines are composed of HPV L1 capsid protein that self-assembles into virus-like particles (VLPs) when expressed in recombinant systems. The two types of prophylactic vaccines are designed a bivalent vaccine to protect against high-risk HPV types 16 and 18 and a quadrivalent vaccine designed to protect against HPV 16 and 18, and low-risk, genital wart-causing HPV 6 and 11. Proof-of-principle trials have suggested that intramuscular injections of VLPs result in strong adaptive immune responses that are capable of neutralizing subsequent natural infections. Recent research on the safety and efficacy of candidate prophylactic vaccines against HPV have shown very promising results with nearly 100% efficacy in preventing the development of persistent infections and cervical precancerous lesions in vaccinated individuals. © 2012 Zerbinis Medical Publications.
Agency: Cordis | Branch: FP7 | Program: CP-FP | Phase: HEALTH.2012.1.2-1 | Award Amount: 7.69M | Year: 2012
Cervical cancer (CC) is the second most common cause of cancer deaths in women worldwide. The main objective of the RAIDs project is to use this model system which is accessible to repeat biopsies to learn how to stratify patients into targeted therapies. The patients tumors will be classified into molecular subtypes based on their molecular profile by use of high-throughput technologies (sequencing, RPPA) combined with integrative bioinformatics analysis. Stratification is a learning process which will need constant readaptation. It will rely on prognostic and predictive biomolecular information gained from patients who will receive either standard therapy (the cognitive cohort) or patients who receive (first generation) targeted therapy. Bioinformatics will be an essential tool to allow integrative genome/proteome analysis and provide functional interpretation of the results at each step. Machine learning techniques will be used to select the most reliable biomarkers. These tools will be used to predict response to cc treatment or progression. Moreover, systems biology approaches will be used to unravel the gene regulatory networks and signaling pathways involved in the tumor progression and should be helpful to select predictive biomarkers and putative drug targets. Tumor material will be sampled before and following standard therapy or therapeutic HPV vaccination and/or novel targeted drug treatments. Clinical annotation by imaging methods as well as through biomarkers will have quality control procedures and relevant statistical models will be applied. RAIDS is a multidisciplinary approach integrating genomic studies, protein arrays, viral genotyping and immunohistochemical investigations on CC cells and tissues between academic clinical centers and SMEs . The project is expected to provide new tools for early diagnosis and targeted treatments exploited by SMEs and to accelerate innovation of CC therapy and improve quality of life.