Determination of immune stimulatory properties of synthetic CpG oligodeoxynucleotide / cationic peptide complexest

Güngör, Bilgi
Synthetic CpG containing oligodeoxynucleotides (ODNs) are recognized by Toll like Receptor 9 (TLR9) and induce a strong pro-inflamatory immune response. To date, four different CpG ODN classes have been described. K-Class ODNs (also known as B-ODN) are potent B cell activators and stimulate TNF secretion from plasmacytoid dendritic cells (pDC). D-Class ODNs (also known as A-ODNs) are the strongest stimulators of IFNa but suffer from GMP production problems through formation of undesirable multimeric structures, preventing their entry into clinical trials. In our study, conventional K-ODNs and cationic peptides TAT (+8) and LL37 (+6) were self-assembled to form nanoparticles. In contrast to free ODN, nanoparticles of sufficient stability stimulate IFNα production from both human and mouse cells. CpG ODN/peptide complexes were also shown to be good adjuvant candidates for vaccines in mouse and provide longer lasting immunity and better protection against a viral disease.


Determination and metabolic engineering of rate limiting reactions in aromatic amino acid pathway in Bacillus subtilis for L-phenylaianine production
Guzide, Calik; Yasemin, Demirci; Pinar, Calik; Ozdamar, Tuncer H. (2007-09-01)
Rate limiting reactions in the aromatic-group amino acid pathway (AAAP) in Bacillus subtilis for l-phenylalanine (Phe) production were determined as reported elsewhere (Özçelik-Şenver et al., 2004). The biochemical reactions in the AAAP start with the reaction using phosphoenolpyruvate (PEP) and erythrose 4-phosphate (E4P) synthesised in the glycolysis pathway and the PPP, respectively, leading to the formation of Phe via chorismate by branching at prephenate. The branch-point metabolites E4P supplied in vi...
Determination of binary pesticide mixtures by an acetylcholinesterase-choline oxidase biosensor
Kok, FN; Hasırcı, Vasıf Nejat (2004-02-15)
In this study, acetylcholinesterase (AChE) and choline oxidase (ChO) were co-immobilized on poly (2-hydroxyethyl methacrylate) (pHEMA) membranes to construct a biosensor for the detection of anti-cholinesterase compounds. pHEMA membranes were prepared with the addition of SnCl4 to achieve the desired porosity. Immobilization of the enzymes was done by surface attachment via epichlorohydrin (Epi) and Cibacron Blue F3G-A (CB) activation. Enzyme immobilized membrane was used in the detection of anti-cholineste...
Evaluating Oxygen Tensions Related to Bone Marrow and Matrix for MSC Differentiation in 2D and 3D Biomimetic Lamellar Scaffolds
Sayin, Esen; Baran, Erkan Turker; Elsheikh, Ahmed; Mudera, Vivek; Cheema, Umber; Hasırcı, Vasıf Nejat (2021-04-01)
The physiological O-2 microenvironment of mesenchymal stem cells (MSCs) and osteoblasts and the dimensionality of a substrate are known to be important in regulating cell phenotype and function. By providing the physiologically normoxic environments of bone marrow (5%) and matrix (12%), we assessed their potential to maintain stemness, induce osteogenic differentiation, and enhance the material properties in the micropatterned collagen/silk fibroin scaffolds that were produced in 2D or 3D. Expression of ost...
Analysis of the genetic determinant for production of the pediocin P of Pediococcus pentosaecus Pep 1
Osmanagaoglu, O; Beyatli, Y; Gündüz, Ufuk; Sacilik, SC (2000-01-01)
Pediococcus pentosaceus Pep1 is a vacuum-packaged Turkish sausage isolate which produces a potentially novel bacteriocin of the pediocin (anti-Listeria) family of peptides designated as pediocin P. Curing experiments and plasmid profile analysis indicated that both bacteriocin immunity and production determinants were linked and encoded by 9.0 MDa plasmid, pHD1.0. Attempts to transform purified plasmid pHD1.0 into recipient Escherichia coli JM109 cells by electroporation were successful but none of the E. c...
Investigation of the therapeutic effect of sodium butyrate in Caco-2 colon cancer cell line by using ATR-FTIR spectroscopy
Çelik, Buket; Bek, Alpan; Özek, Nihal Şimşek; Department of Micro and Nanotechnology (2018)
Sodium butyrate (NaBt), as one of the HDACi, has been demonstrated that it induces apoptosis, cell cycle arrest, the inhibition of angiogenesis, metastasis and gene expression changes. To date, there are several studies perfomed to investigate its therapeutic effect; however, theexact mechanism at molecular level is not clear yet. Therefore, the current thesis was aimed to clarify the action/theurapeutic potential mechanisms of sodium butyrate in Caco2 colon cancer cell line at molecular level using ATR-FTI...
Citation Formats
B. Güngör, “Determination of immune stimulatory properties of synthetic CpG oligodeoxynucleotide / cationic peptide complexest,” M.S. - Master of Science, Middle East Technical University, 2012.