Wos İndeksli Yayınlar Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/11727/4807

Browse

Filters

2019 - 20202

Settings

Has files: NoSubject: search.filters.subject.Bevacizumab

Search Results

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Prognostic factors associated with cytoreductive surgery plus hyperthermic intraperitoneal chemotherapy in recurrent ovarian cancer
    (2020) Ayhan, Ali; Akilli, Huseyin; 33020918; AAX-3230-2020; AAJ-5802-2021
    Objective To identify factors affecting survival for women undergoing cytoreductive surgery plus hyperthermic intraperitoneal chemotherapy (HIPEC). Methods A retrospective study at Baskent University School of Medicine, Ankara, Turkey. Data were evaluated for 71 women with recurrent ovarian cancer who underwent cytoreductive surgery with R0 resection plus HIPEC between 2016 and 2019. Potential factors affecting survival (platinum sensitivity, bevacizumab administration before HIPEC, albumin and CA125 levels, presence of ascites, age, number of chemotherapy lines, and time interval between last chemotherapy and HIPEC) were evaluated. Complications of HIPEC were documented. Results The median age was 58 years, and the median follow-up was 12 months. In univariate analyses, platinum sensitivity, albumin level, and time since last chemotherapy cycle affected overall survival. In multivariate Cox regression analysis, use of bevacizumab before HIPEC (hazard ratio [HR], 6.7; 95% confidence interval [CI], 1.39-32.3; P=0.018) and presence of ascites (HR, 5.3; 95% CI, 1.65-17.5; P=0.005) were independent negative prognostic factors. Seven (8.9%) women experienced grade III-IV complications. Conclusion In recurrent ovarian cancer, HIPEC is a promising treatment with mild-to-moderate toxicity. However, the presence of ascites and progression under bevacizumab treatment before HIPEC seem to be negative prognostic factors; these findings will be important for patient selection.
  • No Thumbnail Available
    Item
    Transscleral Delivery of Bevacizumab-Loaded Chitosan Nanoparticles
    (2019) Ugurlu, Nagihan; Asik, Mehmet Dogan; Cakmak, Hasan Basri; Tuncer, Sema; Turk, Mustafa; Cagil, Nurullah; Denkbas, Emir Baki; 30841975
    Purpose: The aim of this study was to synthesize bevacizumab-loaded nanoparticles and evaluate their effects on the treatment of posterior segment diseases via subtenon injections. Methods: Bevacizumab-loaded chitosan nanoparticles (BLCNs) were synthesized by the ionic gelation method, and their physicochemical characteristics and in vitro release profile were studied. The BLCNs were characterized using atomic force microscopy (AFM), FTIR spectroscopy, dynamic light scattering, and scanning electron microscopy. The BLCNs were delivered into rabbits' eyes via posterior subtenon injections. An immunohistochemical evaluation of the ocular tissues was performed, and the vitreous humor and serum bevacizumab levels were measured by ELISA. Results: Bevacizumab-loaded chitosan nanoparticles with a diameter of 80 to 380 nm were prepared and characterized. In vitro studies showed that after the first 5 days of the experiment, a significant increase in the drug release maintained the desired drug dosage for 3 weeks. Immunohistochemical in vivo studies revealed that there were BLCNs penetrating through the sclera. Furthermore, the intravitreal bevacizumab concentration reached a maximum concentration of 18 mu g/ml, and it decreased to 6 mu g/ml after only a week. Conclusion: The results revealed that subtenon injection of BLCNs is a promising alternative to intravitreal injections. In addition to the ELISA studies, immunohistochemical experiments confirmed that BLCNs enable transscleral bevacizumab penetration, and BLCN usage may provide the required bevacizumab levels for the treatment of posterior segment diseases.