Time filter

Source Type

Sun City Center, United States

Bora A.,West University of Timisoara | Bora A.,Timisoara of Romanian Academy | Avram S.,Timisoara of Romanian Academy | Ciucanu I.,West University of Timisoara | And 2 more authors.
Journal of Chemical Information and Modeling | Year: 2016

In this study we developed two-dimensional pharmacophore-based random forest models for the effective profiling of kinase inhibitors. One hundred seven prediction models were developed to address distinct kinases spanning over all kinase groups. Rigorous external validation demonstrates excellent virtual screening and classification potential of the predictors and, more importantly, the capacity to prioritize novel chemical scaffolds in large chemical libraries. The models built upon more diverse and more potent compounds tend to exert the highest predictive power. The analysis of ColBioS-FlavRC (Collection of Bioselective Flavonoids and Related Compounds) highlighted several potentially promiscuous derivatives with undesirable selectivity against kinases. The prediction models can be downloaded from www.chembioinf.ro. © 2016 American Chemical Society.

Huang C.-W.,Chung Yuan Christian University | Lien D.-H.,National Taiwan University Hospital | Chen B.-T.,Chung Yuan Christian University | Shieh J.,National Taiwan University | And 5 more authors.
Journal of the Acoustical Society of America | Year: 2013

A hybrid method for estimating temperature with spatial mapping using diagnostic ultrasound, based on detection of echo shifts from tissue undergoing thermal treatment, is proposed. Cross-correlation and zero-crossing tracking are two conventional algorithms used for detecting echo shifts, but their practical applications are limited. The proposed hybrid method combines the advantages of both algorithms with improved accuracy in temperature estimation. In vitro experiments were performed on porcine muscle for preliminary validation and temperature calibration. In addition, thermal mapping of rabbit thigh muscle in vivo during high-intensity focused ultrasound heating was conducted. Results from the in vitro experiments indicated that the difference between the estimated temperature change by the proposed hybrid method and the actual temperature change measured by the thermocouple was generally less than 1°C when the increase in temperature due to heating was less than 10°C. For the in vivo study, the area predicted to experience the highest temperature coincided well with the focal point of the high-intensity focused ultrasound transducer. The computational efficiency of the hybrid algorithm was similar to that of the fast cross-correlation algorithm, but with an improved accuracy. The proposed hybrid method could provide an alternative means for non-invasive monitoring of limited temperature changes during hyperthermia therapy. © 2013 Acoustical Society of America.

Cirligeriu L.,Angiogenesis Research Center | Cimpean A.M.,Angiogenesis Research Center | Raica M.,Angiogenesis Research Center | Doros C.I.,Victor Babes University of Medicine and Pharmacy Timisoara
In Vivo | Year: 2014

Podoplanin plays a crucial role for normal and pathological tissue development. Known as a lymphatic endothelial marker, podoplanin has been found to be overexpressed in tumor cells of various cancers with a certified involvement in tumor progression, invasion and metastasis. Oral cancer includes a heterogeneous group of malignancies with unpredictable behaviour and sometimes poor prognosis. Based on these facts, development of new molecular markers with a more reliable impact on therapy and prognosis is required. The present study was designed to characterize podoplanin expression in tumor cells of lip, oral cavity, tongue and pharynx squamous cell carcinomas, together with lymphatic vessels distribution, morphology, density and their impact on tumor progression. Evaluation of podoplanin by D2-40 immunohistochemistry assessement on 56 cases of oral cancers, revealed two different expression patterns in tumor cells depending on their location. Peritumor and intra-tumor lymphatic vessels density, morphology and distribution were correlated with lymph node status but not with tumor stage. The highest number of lymphatic vessels was observed in grade 3 squamous cell carcinomas. Dual expression of podoplanin in tumor cells and lymphatics with particular patterns correlated with histopathology and lymph node status in oral cancer, representing the molecular basis for testing podoplanin as a potential target for anti D2- 40 antibody based therapy.

Taban O.,Angiogenesis Research Center | Cimpean A.M.,Angiogenesis Research Center | Raica M.,Angiogenesis Research Center | Olariu S.,Victor Babes University of Medicine and Pharmacy Timisoara
Anticancer Research | Year: 2014

Background: PROX1 is involved in cancer development and progression as both a tumor suppressor and oncogene. Immunohistochemical (IHC) PROX1 nuclear expression is a widely accepted pattern. Scattered data reported PROX1 IHC cytoplasmic expression in different tumors, including gastric cancer but it is not clear if this holds true. Materials and Methods: Evaluation of the cytoplasmic expression of PROX1 in normal gastric mucosa and gastric cancer was performed by IHC followed by RNAscope, an in situ hybridization-based method for detecting PROX1 mRNA amplification on paraffin-embedded samples and to evaluate its clinical impact. Results: Twenty five out of 48 cases of gastric cancer showed PROX1 nuclear and cytoplasmic immunohistochemical expression. Twelve out of these 20 cases positive for PROX1 on IHC (54.5%) had PROX1 mRNA gene amplification. The overlapping of PROX1 cytoplasmic expression assessed by immunohistochemistry and cytoplasmic RNAscope amplification was statistically significant (p=0.031). PROX1 mRNA gene amplification correlated with tumor grade (p=0.05) and regional lymph node metastasis as well (p=0.033). No significant correlation was obtained between PROX1 and histopathology, tumor size or distal metastasis. Conclusion: A significant correlation was found between IHC and RNAscope PROX1 expression in the cytoplasm of normal and gastric cancer cells. This strongly supports its validation as a true expression on immunohistochemistry. A strong correlation between PROX1 mRNA amplification and regional lymph node metastasis supports its implications in cancer spreading and metastasis and sustains its utility, not only as a lymphatic marker, but also as a potential tumor marker in various tumor types, including gastric cancer.

Duse A.O.,Angiogenesis Research Center | Ceausu R.A.,Angiogenesis Research Center | Cimpean A.M.,Victor Babes University of Medicine and Pharmacy Timisoara | Ionita H.,Angiogenesis Research Center | And 2 more authors.
Romanian Journal of Morphology and Embryology | Year: 2012

The present study described for the first time a high heterogeneity of blood vessels in non-Hodgkin lymphomas (nHL). The tumor blood vessels were highlighted with CD105/smooth muscle actin (SMA) and CD34/SMA double immunostaining. For both follicular and diffuse types of lymphomas, more than 85% of CD34/SMA positive vessels were of immature and intermediate type. A percent of 96.54 from CD105/SMA assessed blood vessels were of activated and mature activated types with high expression of CD105 on endothelial cells of newly formed blood vessels. Our results suggest that these types of vessels are potential therapeutic targets for antivascular therapy.

Discover hidden collaborations