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Tolga T Olmez, Esra Yuca, Erol Eyupoglu, Hazal B Catalak, Ozgur Sahin, Urartu Ozgur Safak Seker
Formation of biological materials is a well-controlled process that is orchestrated by biomolecules such as proteins. Proteins can control the nucleation and mineralization of biomaterials, thereby forming the hard tissues of biological organisms, such as bones, teeth, and shells. In this study, the design and implementation of multifunctional designer proteins are demonstrated for fluorescent silica micro/nanoparticle synthesis. The R5 motif of silaffin polypeptide, which is known for its silicification capability, was fused genetically into three spectrally distinct fluorescent proteins with the intention of forming modified fluorescent proteins...
January 31, 2018: ACS Omega
Fernanda Barbosa Piló, Enrique Javier Carvajal-Barriga, Maria Cristina Guamán-Burneo, Patricia Portero-Barahona, Arthur Matoso Morato Dias, Larissa Falabella Daher de Freitas, Fátima de Cássia Oliveira Gomes, Carlos Augusto Rosa
Chicha, a type of beer made mainly with maize or cassava, is a traditional fermented beverage of the Andean region. There have only been a few studies on yeasts associated with chicha fermentation, and the species diversity occurring during the production of this beverage is not known. The objective of this study was to determine the biodiversity of yeasts in chicha, and to characterize the Saccharomyces cerevisiae populations associated with the production of chicha de jora, seven-grain chicha, chicha de yuca, and chicha de morocho in Ecuador...
October 2018: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
Tugce Onur, Esra Yuca, Tolga Tarkan Olmez, Urartu Ozgur Safak Seker
HYPOTHESIS: Amyloid-forming biofilm proteins of Escherichia coli, namely CsgA and CsgB, can form self-assembled nanofibers on solid surfaces. These proteins can be programmed to form bio-nanomaterials for functional applications. EXPERIMENTS: In this study, the assembly of the CsgA and CsgB protein on solid surfaces was investigated in real time using a quartz crystal microbalance instrument with dissipation monitoring. The assembly kinetics of the CsgA and CsgB proteins in various settings on solid surfaces were investigated...
June 15, 2018: Journal of Colloid and Interface Science
Songül Karakaya, Sefa Gözcü, Zühal Güvenalp, Hilal Özbek, Hafize Yuca, Benan Dursunoğlu, Cavit Kazaz, Ceyda Sibel Kılıç
CONTEXT: Ferulago (Apiaceae) species have been used since ancient times for the treatment of intestinal worms, hemorrhoids, and as a tonic, digestive, aphrodisiac, or sedative, as well as in salads or as a spice due to their special odors. OBJECTIVES: This study reports the α-amylase and α-glucosidase inhibitory activities of dichloromethane extract and bioactive compounds isolated from Ferulago bracteata Boiss. & Hausskn. roots. MATERIALS AND METHODS: The isolated compounds obtained from dichloromethane extract of Ferulago bracteata roots through bioassay-guided fractionation and isolation process were evaluated for their in vitro α-amylase and α-glucosidase inhibitory activities at 5000-400 µg/mL concentrations...
December 2018: Pharmaceutical Biology
Kurt W Evans, Erkan Yuca, Argun Akcakanat, Stephen M Scott, Natalia Paez Arango, Xiaofeng Zheng, Ken Chen, Coya Tapia, Emily Tarco, Agda K Eterovic, Dalliah M Black, Jennifer K Litton, Timothy A Yap, Debu Tripathy, Gordon B Mills, Funda Meric-Bernstam
Background: Breast cancer patients who do not respond to neoadjuvant therapy have a poor prognosis. There is a pressing need for novel targets and models for preclinical testing. Here we report characterization of breast cancer patient-derived xenografts (PDX) largely generated from residual tumors following neoadjuvant chemotherapy. Experimental Design: PDXs were derived from surgical samples of primary or locally recurrent tumors. Normal and tumor DNA sequencing, RNASeq, and reverse phase protein arrays (RPPA) were performed...
November 1, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
Sarah Kay VanOosten, Esra Yuca, Banu Taktak Karaca, Kyle Boone, Malcolm L Snead, Paulette Spencer, Candan Tamerler
Silver nanoparticles (AgNP) are promising candidates for fighting drug-resistant infections because of their intrinsic antimicrobial effect. The design of high-yield antimicrobial molecules may inadvertently cause variation in host cells' biological responses. While many factors affect AgNPs' efficacy, their surface is exposed to the biological environment and thus plays a critical role in both the preservation of antimicrobial efficacy against pathogens and the modulation of host cells cytotoxicity. This work investigated an engineered biomimetic interface approach to controlling AgNP surface properties to provide them a competitive advantage in a biological environment...
September 2016: Surface Innovations
Qiang Ye, Paulette Spencer, Esra Yuca, Candan Tamerler
Failure of dental composite restorations is primarily due to recurrent decay at the tooth-composite interface. At this interface, the adhesive and its bond with dentin is the barrier between the restored tooth and the oral environment. In vivo degradation of the bond formed at the adhesive/dentin (a/d) interface follows a cascade of events leading to weakening of the composite restoration. Here, a peptide-based approach is developed to mineralize deficient dentin matrices at the a/d interface. Peptides that have an inherent capacity to self-assemble on dentin and to induce calcium-phosphate remineralization are anchored at the interface...
May 2017: Macromolecular Materials and Engineering
Natalia Paez Arango, Erkan Yuca, Ming Zhao, Kurt W Evans, Stephen Scott, Charissa Kim, Ana Maria Gonzalez-Angulo, Filip Janku, Naoto T Ueno, Debu Tripathy, Argun Akcakanat, Aung Naing, Funda Meric-Bernstam
BACKGROUND: Selinexor (KPT-330) is an oral agent that has been shown to inhibit the nuclear exporter XPO1. Given the pressing need for novel therapies for triple-negative breast cancer (TNBC), we sought to determine the antitumor effects of selinexor in vitro and in vivo. METHODS: Twenty-six breast cancer cell lines of different breast cancer subtypes were treated with selinexor in vitro. Cell proliferation assays were used to measure the half-maximal inhibitory concentration (IC50 ) and to test the effects in combination with chemotherapy...
August 15, 2017: Breast Cancer Research: BCR
Fatma Hilal Yılmaz, Sevil Arı Yuca, Hüsamettin Vatansev, Emine Ayça Cimbek, Yaşar Şen, İsa Yılmaz, Fikret Akyürek, Derya Arslan, Derya Çimen, Alaaddin Yorulmaz
OBJECTIVE: This study aimed to measure the serum levels of heart-type fatty acid binding protein (H-FABP) in patients presenting with diabetic ketoacidosis (DKA) and diabetic ketosis (DK) and to determine its role in identifying early-period cardiac ischemia. METHODS: This prospective study included 35 patients diagnosed with DKA, 20 patients diagnosed with DK, and 20 control subjects. H-FABP, creatine kinase-MB (CK-MB), and troponin I levels were investigated at presentation in patients with DKA and DK and in the control group...
June 1, 2017: Journal of Clinical Research in Pediatric Endocrinology
S A Yuca, E A Cimbek, Y Şen, O Güvenç, H Vatansev, F Buğrul, F Gün, B Oran
Objective: Childhood obesity which is a predictor of adulthood obesity is associated with type 2 diabetes, metabolic syndrome, dyslipidemia, coronary artery diseases and subclinical inflammation. Growth differentiation factor-15, also known as macrophage inhibitory cytokine-1 (MIC-1/GDF15) is a member of the transforming growth factor- β super family and increases during inflammatory states. Adults with obesity have increased serum concentrations of MIC-1/GDF15. MIC-1/GDF15 is associated with cardio metabolic risk in adults...
February 2017: Experimental and Clinical Endocrinology & Diabetes
Hui Zhao, Qing Yang, Neslihan Yuca, Min Ling, Kenneth Higa, Vincent S Battaglia, Dilworth Y Parkinson, Venkat Srinivasan, Gao Liu
Control over porous electrode microstructure is critical for the continued improvement of electrochemical performance of lithium ion batteries. This paper describes a convenient and economical method for controlling electrode porosity, thereby enhancing material loading and stabilizing the cycling performance. Sacrificial NaCl is added to a Si-based electrode, which demonstrates an areal capacity of ∼4 mAh/cm(2) at a C/10 rate (0.51 mA/cm(2)) and an areal capacity of 3 mAh/cm(2) at a C/3 rate (1.7 mA/cm(2)), one of the highest material loadings reported for a Si-based anode at such a high cycling rate...
July 13, 2016: Nano Letters
Emine Ayça Cimbek, Yaşar Şen, Sevil Arı Yuca, Demet Çam, Celal Gür, Harun Peru
Association of Kocher-Debré-Semelaigne syndrome-a myopathy of hypothyroidism in childhood characterized by muscular hypertrophy, with rhabdomyolysis is very rare. We present a case of Kocher-Debré-Semelaigne syndrome with rhabdomyolysis secondary to Hashimoto's thyroiditis. He had muscular symptoms simulating poly/dermatomyositis, massively elevated creatine kinase (CK) levels and high creatinine levels. All of the findings reversed on treatment of hypothyroidism. The response to the therapy strongly suggested that Kocher-Debré-Semelaigne (KDS) syndrome was the underlying etiology...
November 1, 2015: Journal of Pediatric Endocrinology & Metabolism: JPEM
Beray Selver Eklioglu, Mehmet Emre Atabek, Nesibe Akyurek, Sevil Ari Yuca, Mesut Piskin
BACKGROUND: Ovotesticular disorders of sexual development (OT-DSD) represent a rare sex development disorder characterized by the presence of both ovarian and testicular tissues in the same or the contralateral gonad. CASE: We present the case of a 14-year-old female patient with signs of virilization at a pubertal age and with dysmorphic features, diagnosed as 46,XX OT-DSD. CONCLUSION: We want to point out that patients with 46 XX OT-DSD may present with virilization at puberty and may be accompanied by dysmorphic features...
December 2015: Journal of Pediatric and Adolescent Gynecology
Burcu Aslan, Paloma Monroig, Ming-Chuan Hsu, Guillermo Armaiz Pena, Cristian Rodriguez-Aguayo, Vianey Gonzalez-Villasana, Rajesha Rupaimoole, Archana Sidalaghatta Nagaraja, Selanere Mangala, Hee-Dong Han, Erkan Yuca, Sherry Y Wu, Cristina Ivan, Tyler J Moss, Prahlad T Ram, Huamin Wang, Alexandra Gol-Chambers, Ozgur Ozkayar, Pinar Kanlikilicer, Enrique Fuentes-Mattei, Nermin Kahraman, Sunila Pradeep, Bulent Ozpolat, Susan Tucker, Mien-Chie Hung, Keith Baggerly, Geoffrey Bartholomeusz, George Calin, Anil K Sood, Gabriel Lopez-Berestein
Ovarian cancer (OC) is a highly metastatic disease, but no effective strategies to target this process are currently available. Here, an integrative computational analysis of the Cancer Genome Atlas OC data set and experimental validation identifies a zinc finger transcription factor ZNF304 associated with OC metastasis. High tumoral ZNF304 expression is associated with poor overall survival in OC patients. Through reverse phase protein array analysis, we demonstrate that ZNF304 promotes multiple proto-oncogenic pathways important for cell survival, migration and invasion...
2015: Nature Communications
Halise Inci Gul, Kaan Kucukoglu, Cem Yamali, Sinan Bilginer, Hafize Yuca, Iknur Ozturk, Parham Taslimi, Ilhami Gulcin, Claudiu T Supuran
In this study, 4-(2-substituted hydrazinyl)benzenesulfonamides were synthesized by microwave irradiation and their chemical structures were confirmed by (1)H NMR, (13)CNMR, and HRMS. Ketones used were: Acetophenone (S1), 4-methylacetophenone (S2), 4-chloroacetophenone (S3), 4-fluoroacetophenone (S4), 4-bromoacetophenone (S5), 4-methoxyacetophenone (S6), 4-nitroacetophenone (S7), 2-acetylthiophene (S8), 2-acetylfuran (S9), 1-indanone (S10), 2-indanone (S11). The compounds S9, S10 and S11 were reported for the first time, while S1-S8 was synthesized by different method than literature reported using microwave irradiation method instead of conventional heating in this study...
August 2016: Journal of Enzyme Inhibition and Medicinal Chemistry
Siqi Zhang, Banu Taktak Karaca, Sarah Kay VanOosten, Esra Yuca, Suntharavathanan Mahalingam, Mohan Edirisinghe, Candan Tamerler
Nanofibers featuring functional nanoassemblies show great promise as enabling constituents for a diverse range of applications in areas such as tissue engineering, sensing, optoelectronics, and nanophotonics due to their controlled organization and architecture. An infusion gyration method is reported that enables the production of nanofibers with inherent biological functions by simply adjusting the flow rate of a polymer solution. Sufficient polymer chain entanglement is obtained at Berry number > 1.6 to make bead-free fibers integrated with gold nanoparticles and proteins, in the diameter range of 117-216 nm...
July 2015: Macromolecular Rapid Communications
Yasin Kursad Varsak, Koksal Yuca, Mehmet Akif Eryılmaz, Hamdi Arbag
UNLABELLED: The aim of this study was to evaluate the postoperative debridement frequency following endoscopic sinus surgery. Individual randomized controlled trial. Sixty-two adult patients with a diagnosis of chronic rhino sinusitis (CRS) with nasal polyps (NP) and CRS without NP meeting the inclusion criteria were enrolled in this prospective study. The patients were randomized equally to frequent debridement (FD; at postoperative weeks 1, 2 and 4) or to a single debridement (SD; at postoperative week 1) after surgery...
March 2016: European Archives of Oto-rhino-laryngology
Emine Ayça Cimbek, Yaşar Şen, Sevil Arı Yuca, Harun Peru
Calcium pyrophosphate dehydrate (CPPD) crystal deposition disease (also known as chondrocalcinosis, CC) is a rare metabolic arthropathy mostly seen in elderly patients. Chondrocalcinosis may be associated with metabolic diseases such as hypomagnesemia when it occurs in young people. We report here a case with hypomagnesemia due to familial hypomagnesemia with hypercalciuria and nephrocalcinosis (FHHNC) who developed CC during clinical follow-up. To our best knowledge this is the first case of a young patient with CPPD associated with FHHNC...
May 2015: Journal of Pediatric Endocrinology & Metabolism: JPEM
Yang Jin, Ling Wang, Su Qu, Xia Sheng, Alexandr Kristian, Gunhild M Mælandsmo, Nora Pällmann, Erkan Yuca, Ibrahim Tekedereli, Kivanc Gorgulu, Neslihan Alpay, Anil Sood, Gabriel Lopez-Berestein, Ladan Fazli, Paul Rennie, Bjørn Risberg, Håkon Wæhre, Håvard E Danielsen, Bulent Ozpolat, Fahri Saatcioglu
The six transmembrane protein of prostate 2 (STAMP2) is an androgen-regulated gene whose mRNA expression is increased in prostate cancer (PCa). Here, we show that STAMP2 protein expression is increased in human PCa compared with benign prostate that is also correlated with tumor grade and treatment response. We also show that STAMP2 significantly increased reactive oxygen species (ROS) in PCa cells through its iron reductase activity which also depleted NADPH levels. Knockdown of STAMP2 expression in PCa cells inhibited proliferation, colony formation, and anchorage-independent growth, and significantly increased apoptosis...
March 2015: EMBO Molecular Medicine
Sang-Jae Park, Hui Zhao, Guo Ai, Cheng Wang, Xiangyun Song, Neslihan Yuca, Vincent S Battaglia, Wanli Yang, Gao Liu
Here we describe a class of electric-conducting polymers that conduct electrons via the side chain π-π stacking. These polymers can be designed and synthesized with different chemical moieties to perform different functions, extremely suitable as a conductive polymer binder for lithium battery electrodes. A class of methacrylate polymers based on a polycyclic aromatic hydrocarbon side moiety, pyrene, was synthesized and applied as an electrode binder to fabricate a silicon (Si) electrode. The electron mobilities for PPy and PPyE are characterized as 1...
February 25, 2015: Journal of the American Chemical Society
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