Browsing by Author "Cui, Huadong"
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Item Corrigendum to “Semisynthesis and pharmacological activities of thyroxine analogs: Development of new angiogenesis modulators” [Bioorg. Med. Chem. Lett. 20 (2010) 3394](Pergamon-Elsevier Science, 2010-09-15) Bridoux, Alexandre; Cui, Huadong; Dyskin, Evgeny; Schmitzer, Andreea Ruxandra; Mousa, Shaker A.; Yalçın, Murat; Uludağ Üniversitesi/Veterinerlik Fakültesi/Temel Bilimler Bölümü.; 0000-0002-5600-8162; AAG-6956-2021; 57192959734Item Increased tumor uptake of chemotherapeutics and improved chemoresponse by novel non-anticoagulant low molecular weight heparin(Int Inst Anticancer Research, 2011-02) Phillips, Patricia G.; Cui, Huadong; Abdel, Hani Nabi; Sajjad, Munawwar; Bernacki, Ralph; Veith, Jean; Mousa, Shaker A.; Yalçın, Murat; Uludağ Üniversitesi/Veterinerlik Fakültesi/Fizyoloji Anabilim Dalı.; 0000-0002-5600-8162; AAG-6956-2021; 57192959734Background: Recent prospective clinical trials of low molecular weight heparins (LMWHs) have demonstrated that these agents may provide significant advantages in terms of progression-free and overall survival in certain subgroups of cancer patients. The mechanisms of improved survival associated with LMWHs are not known, and may involve direct and/or indirect effects on tumor growth. The purpose of this study was to investigate the effects of LMWH and a sulfated non-anticoagulant LMWH (S-NACH) on tumor chemotherapeutic uptake and chemoresponse. Materials and Methods: LMWH and S-NACH were tested for their ability to reduce tumor growth and tumor-associated angiogenesis using three different in vivo models. Biodistribution studies were undertaken to determine the effect of these agents on uptake of paclitaxel (PACL) and doxorubicin (Dox) by breast cancer tumor xenografts. Results: LMWH and S-NACH (10 mg/kg s.c. daily) effectively limited tumor growth of human A549 lung adenocarcinoma xenografts in the nude mouse. In an MDA453/LCC6 breast tumor xenograft model, PACL plus S-NACH showed significant (p<0.01) tumor growth suppression and improved survival when compared to PACL alone. LMWH increased [I124-]-PACL uptake into MDA453/LCC6 tumors, with tumor:muscle ratios several fold greater than that of [I124-]-PACL alone 24 h post-injection. Similarly, LMWH and S-NACH significantly (p<0.01) increased the uptake of Dox by 1.5-2 fold in MCF7 Dox-resistant tumor xenografts. Conclusion: Protocols utilizing adjuvant or neoadjuvant therapy with LMWH or S-NACH could lead to increased tumor chemo responsiveness, potentially overcoming tumor chemoresistance.Item Semisynthesis and pharmacological activities of tetrac analogs: Angiogenesis modulators(Pergamon-Elsevier Science, 2009-06-15) Bridoux, Alexandre; Cui, Huadong; Dyskin, Evgeny A.; Mousa, Shaker A.; Yalçın, Murat; Uludağ Üniversitesi/Veteriner Fakültesi/Fizyoloji Anabilim Dalı.; 0000-0002-5600-8162; AAG-6956-2021; 57192959734Novel Tetrac analogs were synthesized and then tested. Anti-angiogenesis efficacy was carried out using the Chick Chorioallantoic Membrane (CAM) model and the mouse matrigel model for angiogenesis. Pharmacological activities showed Tetrac can accommodate numerous modifications and maintain anti-angiogenesis activity.Item Semisynthesis and pharmacological activities of thyroxine analogs: Development of new angiogenesis modulators(Pergamon-Elsevier Science, 2010-06-01) Bridoux, Alexandre; Cui, Huadong; Dyskin, Evgeny; Schmitzer, Andreea Ruxandra; Mousa, Shaker A.; Yalçın, Murat; Uludağ Üniversitesi/Veterinerlik Fakültesi/Temel Bilimler Bölümü.; 0000-0002-5600-8162; AAG-6956-2021; 57192959734Novel thyroxine analogs with hindered phenol, amino and carboxylic acid groups have been synthesized and the effects of the synthesized compounds on angiogenesis using the chick chorioallantoic membrane and mouse matrigel models have been tested. Pharmacological profiles revealed that thyroxine tolerates numerous modifications on the amino group and remains active. These results provide the rationale for the selection of a novel thyroxine nanoparticle precursor.