Synthesis of peptide-fullerenol conjugate and peptide hydrogels for drug delivery

Download
2022-1-7
Demirci, Hande
In past decades, peptides were examined thoroughly and their use for biomedical applications enhanced largely. Peptides can be used in different forms such as selfassembly hydrogels, scaffolds, nanotubes, etc. These forms benefit various applications such as developing drugs, targeted drug delivery, wound dressings, and tissue engineering. Peptide hydrogels are used mostly for these applications that were mentioned previously. In addition, peptides can have antimicrobial properties depending on their sequence. Antimicrobial peptides (AMP) have a wide range of use in health care, animal husbandry, agriculture, aquaculture, etc. In this thesis, Ac-(FKFE)2, Ac-(FKFE)3, and Ac-IKYLSVN-NH2 peptides were synthesized based on the literature by using the Solid Phase Peptide Synthesis method. Then, gel formation of the peptides was examined in different solvents and solutions such as water, phosphate buffer saline (PBS), NaCl solution, and cell medium. Successful gel formation was observed for the peptide Ac-(FKFE)3, and Ac-IKYLSVN-NH2. It has been stated in the literature that Ac-IKYLSVN-NH2 has an antimicrobial effect. Thus, biological studies were only conducted for Ac- IKYLSVN-NH2 to examine antimicrobial susceptibility and drug release capability of the peptide. Fullerenols are water-soluble fullerene derivatives which can be functionalized by amino acids and peptides to achieve desired properties. A fullerenol-peptide conjugate was tried to be synthesized and characterized using the peptide Ac- IKYLSVN-NH2.

Suggestions

Characterization and Evaluation of Triamcinolone, Raloxifene, and Their Dual-Loaded Microspheres as Prospective Local Treatment System in Rheumatic Rat Joints
Ocal, Yigit; Kurum, Baris; Karahan, Siyami; Tezcaner, Ayşen; Ozen, Seza; Keskin, Dilek (Elsevier BV, 2014-8)
In this study, injectable microspheres were developed for the local treatment of joint degeneration in rheumatoid arthritis (RA). Microspheres loaded with triamcinolone (TA), a corticosteroid drug, and/or raloxifene (Ral), a cartilage regenerative drug, were prepared with a biodegradable and biocompatible polymer, polycaprolactone (PCL). Microspheres were optimized for particle size, structural properties, drug release, and loading properties. In vitro release of Ral was very slow because of the low solubil...
DEVELOPMENT OF 3D PRINTED PECTIN AND GELATIN BASED BIOACTIVE SKIN GRAFTS
Bostancı, Nazlı Seray; Tezcaner, Ayşen; Hasırcı, Nesrin; Department of Biotechnology (2021-8-10)
The aim of this study was to develop an easily applicable and bioactive skin graft composed of methacrylated pectin (PeMA) and methacrylated gelatin (GelMA), containing curcumin and/or Vitamin-C as antimicrobial and healing accelerating agents, respectively. Grafts were prepared in slab, 3D printed and 3D bioprinted forms and different properties were evaluated. Preparation parameters were optimized using slabs having different compositions (PeMA:GelMA as P:G 1:1, 1:2 and 1:3, v/v). P1:G1 solution did not h...
Peptide stapling by late-stage Suzuki-Miyaura cross-coupling
Gruss, Hendrik; Feiner, Rebecca C.; Mseya, Ridhiwan; Schroeder, David C.; Jewginski, Michat; Mueller, Kristian M.; Latajka, Rafat; Marıon, Antoıne; Sewald, Norbert (2022-01-01)
The development of peptide stapling techniques to stabilise alpha-helical secondary structure motifs of peptides led to the design of modulators of protein-protein interactions, which had been considered undruggable for a long time. We disclose a novel approach towards peptide stapling utilising macrocyclisation by late-stage Suzuki-Miyaura cross-coupling of bromotryptophan-containing peptides of the catenin-binding domain of axin. Optimisation of the linker length in order to find a compromise between both...
Nanocrystal Encoded FluorescentMicrobeads for Proteomics AntibodyProfiling and Diagnostics ofAutoimmune Diseases
Sukhanova, Alyona; Susha , Andrei; Bek, Alpan; Mayilo, Sergiy; Rogach , Andrey; Feldmann, Jochen; Oleinikov, Vladimir; Reveil, Brigitte; Donvito, Beatrice; Cohen, Jacques; Nabiev, İgor (2007-01-01)
The first application of nanocrystal (NC)-encoded microbeads to clinical proteomics is demonstrated by multiplexed detection of circulating autoantibodies, markers of systemic sclerosis. Two-color complexes, consisting of NC-encoded, antigen-covered beads, anti-antigen antibody or clinical serum samples, and dye-tagged detecting antibodies, were observed using flow cytometry assays and on the surface of single beads. The results of flow cytometry assays correlated with the ELISA technique and provided clear...
Use of Fenton oxidation to improve the biodegradability of a pharmaceutical wastewater
Tekin, Huseyin; BİLKAY, Okan; Ataberk, Selale S.; Balta, Tolga H.; Ceribasi, I. Haluk; Sanin, Faika Dilek; Dilek, Filiz Bengü; Yetiş, Ülkü (2006-08-21)
The applicability of Fenton's oxidation to improve the biodegradability of a pharmaceutical wastewater to be treated biologically was investigated. The wastewater was originated from a factory producing a variety of pharmaceutical chemicals. Treatability studies were conducted under laboratory conditions with all chemicals (having COD varying from 900 to 7000 mg/L) produced in the factory in order to determine the operational conditions to utilize in the full-scale treatment plant. Optimum pH was determined...
Citation Formats
H. Demirci, “Synthesis of peptide-fullerenol conjugate and peptide hydrogels for drug delivery,” M.S. - Master of Science, Middle East Technical University, 2022.