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In this study, it was aimed to optimize the biosynthesis of silver nanoparticles with a Box-Behnken design. The white propolis extract was utilized as the reduction and stabilizing agent. The synthesized silver nanoparticles using white propolis extract solution were optimized by Box-Behnken design considering the effect of certain independent variables such as microwave power, time, and concentration of AgNO3 (silver nitrate). A quadratic polynomial model was used in mathematical modeling and response surface analysis was performed to determine the independent variable-response relationship. The optimum synthesis conditions were determined as 10 mM of AgNO3 concentration, 0.3 of VExt/VAg, 150 watts of microwave power, and 35 seconds. The optimized silver nanoparticles were characterized using FTIR (Fourier Infrared) spectroscopy, UV-VIS (Ultraviolent visible) spectrophotometry, and DLS (Dynamic Light Scattering). In addition, the antibacterial activity of the optimized silver nanoparticles was tested against Staphylococcus aureus (S. aureus), Klebsiella pneumonia (K. pneumoniae), Pseudomonas aeruginosa (P. aeruginosa), and Enterococcus faecalis (E. faecalis) strains. It was observed that synthesized silver nanoparticles had higher antibacterial activity compared to propolis extract.

Kanser, dünyadaki en yaygın hastalıklardan biridir. Meme kanseri, akciğer kanserinden sonra ikinci en ölümcül kanser türüdür. Cerrahi müdahale, kemoterapi ve radyoterapi meme kanseri tedavisinde en çok kullanılan geleneksel yöntemlerdir. Konvansiyonel tedavilerin hedefe yönelik olmayan yaklaşımı, sağlıklı hücrelerde ve dokularda ciddi yan etkilere neden olur ve mortalite genellikle bu geleneksel tedavilerin yan etkilerinden dolayı gerçekleşmektedir. Son yıllarda kanser hücrelerini hedef alan ilaç taşıyıcı sistemler adı verilen nano boyutlu partiküller kanser tedavisinde yeni bir yaklaşım olarak dikkatleri üzerine çekmektedir. Bu nanotaşıyıcı sistemlerin sağlıklı dokulara zarar vermeden tümör hücrelerini hedef alması meme kanseri tedavisi için umut verici bir yaklaşımdır. Ayrıca nanotaşıyıcılar, düşük toksisite, yüksek biyouyumluluk, biyobozunurluk, kullanım kolaylığı, yüksek doz ilaç yükleme ve ayarlanabilir yüzey işlevleri gösterebilen benzersiz biyomalzemelerdir. Bu çalışmada, meme kanseri tedavisine alternatif bir yaklaşım sunan nanotaşıyıcıların son çalışmalarını eleştirel bir analizle özetledik., Cancer is one of the most prevalent diseases in the world. Breast cancer is the second most deadly cancer type after lung cancer. Surgical intervention, chemotherapy and radiotherapy are the most used conventional methods in the treatment of breast cancer. The non-targeted approach of conventional treatments causes serious side effects in healthy cells and tissues, and often mortality is due to the side effects of these conventional treatments. In recent years, nano-sized particles called drug delivery systems targeting cancer cells have attracted attention as a new approach in cancer treatment. The fact that these nanocarrier systems target tumor cells without damaging healthy tissues has been a hope for breast cancer. Moreover, nanocarriers are unique biomaterials that may exhibit low toxicity, high biocompatibility, biodegradability, ease of use, high dose drug loading, and adjustable surface functionalities. In the present study, we summarize recent studies of nanocarriers that offer a critical review of an alternative strategy to breast cancer therapy.

Heat shock protein 90 (Hsp90) is a key chaperone that is abnormally expressed in cancer cells, and therefore, designing novel compounds to inhibit chaperone activities of the Hsp90 is a promising therapeutic approach for cancer drug discovery. Debio-0932 is a second-generation Hsp90 inhibitor that exhibited promising anticancer activity against a wide variety of cancer types with a strong binding affinity for Hsp90 and high oral bioavailability. Anticancer activities of the Debio-0932 were tested in MCF-7 and MDA-MB-231 cell lines. Molecular docking results indicated that Debio-0932 was selectively bound to the ATP binding pocket of the Hsp90 with an estimated free energy of binding − 7.24 kcal/mol. Antiproliferative activity of Debio-0932 was determined by XTT assay and Debio-0932 exhibited a cytotoxic effect on MCF-7 and MDA-MB-231 cells in a time and dose-depended manner. Apoptosis inducer role of Debio-0932 was evaluated in MCF-7 and MDA-MB-231 cells with fluorometric apoptosis/necrosis detection kit. Treatment with Debio-0932 stimulated apoptosis in both breast cancer cell lines. mRNA and protein expression levels of Bax, Bcl-2 and Casp-9 were determined in MCF-7 and MDA-MB-231 cells by RT-PCR and Western blotting respectively. Debio-0932 stimulated the down-regulation of anti-apoptotic protein Bcl-2 and the up-regulation of apoptotic protein Bax and cleavage of Casp-9 in cancer cells. Moreover, the anti-invasive potential of Debio-0932 was evaluated in endothelial cells (HUVEC) by wound-healing assay. Debio-0932 decreased the migration of HUVEC cells as compared to the control group. These results indicate that Debio-0932 is a promising compound to treat triple-negative breast cancer and hormone receptor-positive breast cancer, and their metastases.

In this study, the synthesis of new polymer-protein conjugates using a grafting-from strategy was performed by employing photo-induced electron transfer reversible addition-fragmentation chain transfer (PET-RAFT) polymerization. D-aminoacylase is an industrially significant enzyme for the preparation of chiral amino acids and it is coupled with reversible addition-fragmentation (RAFT) chain transfer agent (CTA) using activated ester chemistry. The effects of polymeric side chain compositions on the activity of D-aminoacylase were studied with two different polymeric side chain lengths. For this reason, two monomers, a hydrophilic N-(2-aminoethyl acrylamide) and a hydrophobic and N- (iso-butoxymethyl) acrylamide were used, respectively. It was found that modification by grafting from strategy increased the thermal stability of D-aminoacylase enzyme. Additionally, the hydrophobic monomer conjugate has been reported to increase the activity of the enzyme more than the hydrophilic monomer., Bu çalışmada, aşılama stratejisi kullanılarak yeni polimer-protein konjugatlarının sentezi foto-indüklenmiş elektron transferi tersinir ekleme-parçalanma zincir transferi (PET-RAFT) polimerizasyonu ile gerçekleştirilmiştir. D-aminoaçilaz, kiral amino asitlerin hazırlanmasında kullanılan endüstriyel olarak önemli bir enzimdir ve aktive edilmiş ester kimyası kullanılarak tersinir ekleme-parçalama (RAFT) zincir transfer maddesi (CTA) ile birleştirilir. Polimerik yan zincir bileşimlerinin D-aminoaçilaz aktivitesi üzerindeki etkileri, iki farklı polimerik yan zincir uzunluğu ile incelenmiştir. Bu nedenle sırasıyla hidrofilik N-(2-aminoetil akrilamid) ve hidrofobik ve N-(izo-bütoksimetil) akrilamid olmak üzere iki farklı monomer kullanılmıştır. D-aminoaçilaz enziminin aşılama stratejisi ile modifikasyonun, enziminin termal stabilitesini arttırdığı bulundu. Ek olarak, hidrofobik monomer konjugatının, enzimin aktivitesini hidrofilik monomerden daha fazla arttırdığı rapor edilmiştir.

Heat shock protein 90 (Hsp90) is a key chaperone that is abnormally expressed in cancer cells, and therefore, designing novel compounds to inhibit chaperone activities of the Hsp90 is a promising therapeutic approach for cancer drug discovery. Debio-0932 is a second-generation Hsp90 inhibitor that exhibited promising anticancer activity against a wide variety of cancer types with a strong binding affinity for Hsp90 and high oral bioavailability. Anticancer activities of the Debio-0932 were tested in MCF-7 and MDA-MB-231 cell lines. Molecular docking results indicated that Debio-0932 was selectively bound to the ATP binding pocket of the Hsp90 with an estimated free energy of binding - 7.24 kcal/mol. Antiproliferative activity of Debio-0932 was determined by XTT assay and Debio-0932 exhibited a cytotoxic effect on MCF-7 and MDA-MB-231 cells in a time and dose-depended manner. Apoptosis inducer role of Debio-0932 was evaluated in MCF-7 and MDA-MB-231 cells with fluorometric apoptosis/necrosis detection kit. Treatment with Debio-0932 stimulated apoptosis in both breast cancer cell lines. mRNA and protein expression levels of Bax, Bcl-2 and Casp-9 were determined in MCF-7 and MDA-MB-231 cells by RT-PCR and Western blotting respectively. Debio-0932 stimulated the down-regulation of anti-apoptotic protein Bcl-2 and the up-regulation of apoptotic protein Bax and cleavage of Casp-9 in cancer cells. Moreover, the anti-invasive potential of Debio-0932 was evaluated in endothelial cells (HUVEC) by wound-healing assay. Debio-0932 decreased the migration of HUVEC cells as compared to the control group. These results indicate that Debio-0932 is a promising compound to treat triple-negative breast cancer and hormone receptor-positive breast cancer, and their metastases.

The green synthesis of metal nanoparticles has been promising approach in the field of nanomedicine due to its low-cost, non-toxic, biocompatible and sustainable features. In literature, therapeutic potentials of silver nanoparticles (AgNPs) coupled with natural extracts have been extensively evaluated against various diseases. The present study aims at preparation of AgNPs using Coriolus versicolor and Boletus edulis mushroom extract based on the microwave-assisted method. The synthesized C. versicolor-silver nanoparticles (CV-AgNPs) and B. edulis-silver nanoparticles (BE-AgNPs) were characterized by UV–Visible spectroscopy, dynamic light scattering technique (DLS) and fourier transform infrared spectroscopy (FTIR). Anticancer activity of AgNPs was tested on MCF-7, HT-29 and HUH-7 cell lines. Antimicrobial efficacy of AgNPs was determined against pathogens bacterial (Pseudomonas aeruginosa, Klebsiella pneumonia, Staphylococcus aureus and Enterococcus faecalis) and fungal (Candida albicans and Candida utilis) strains. Also, wound healing potential of AgNPs was examined on L929 cells. Obtained results demonstrated that synthesized CV-AgNPs and BE-AgNPs had an average size diameter of