PMID- 28181828 OWN - NLM STAT- MEDLINE DCOM- 20170403 LR - 20210709 IS - 1521-0464 (Electronic) IS - 1071-7544 (Print) IS - 1071-7544 (Linking) VI - 24 IP - 1 DP - 2017 Nov TI - Synthesis of sericin-based conjugates by click chemistry: enhancement of sunitinib bioavailability and cell membrane permeation. PG - 482-490 LID - 10.1080/10717544.2016.1267822 [doi] AB - Sericin is a natural protein that has been used in biomedical and pharmaceutical fields as raw material for polypeptide-based drug delivery systems (DDSs). In this paper, it has been employed as pharmaceutical biopolymer for the production of sunitinib-polypeptide conjugate. The synthesis has been carried out by simple click reaction in water, using the redox couple l-ascorbic acid/hydrogen peroxide as a free radical grafting initiator. The bioconjugate molecular weight (50 kDa < Mw < 75 kDa) was obtained by SDS-PAGE, while the spectroscopic characteristics have been studied in order to reveal the presence of grafted sunitinib. In both FT-IR and UV/Vis spectra, signals corresponding to sunitinib functional groups have been identified. Since sunitinib is an anticancer drug characterized by low bioavailability and low permeability, the bioconjugation aimed at their enhancement. In vitro studies demonstrated that bioavailability has been increased to almost 74%, compared with commercial formulation. Also cell membrane permeability has been augmented in in vitro tests, in which membrane models have been used to determine the lipid membrane/physiological fluid partition coefficient (Kp). The log(Kp) value of the bioconjugate was increased to over 4. This effect resulted in a three-fold decrease of IC(50) value against MCF-7 cells. FAU - Scrivano, Luca AU - Scrivano L AD - a Department of Pharmacy, Health and Nutritional Sciences, University of Calabria , Rende , CS , Italy. FAU - Iacopetta, Domenico AU - Iacopetta D AD - a Department of Pharmacy, Health and Nutritional Sciences, University of Calabria , Rende , CS , Italy. FAU - Sinicropi, Maria Stefania AU - Sinicropi MS AD - a Department of Pharmacy, Health and Nutritional Sciences, University of Calabria , Rende , CS , Italy. FAU - Saturnino, Carmela AU - Saturnino C AD - b Department of Sciences, University of Basilicata , Potenza , Italy , and. FAU - Longo, Pasquale AU - Longo P AD - c Department of Chemistry and Biology, University of Salerno , Fisciano , SA , Italy. FAU - Parisi, Ortensia Ilaria AU - Parisi OI AD - a Department of Pharmacy, Health and Nutritional Sciences, University of Calabria , Rende , CS , Italy. FAU - Puoci, Francesco AU - Puoci F AD - a Department of Pharmacy, Health and Nutritional Sciences, University of Calabria , Rende , CS , Italy. LA - eng PT - Comparative Study PT - Journal Article PL - England TA - Drug Deliv JT - Drug delivery JID - 9417471 RN - 0 (Antineoplastic Agents) RN - 0 (Drug Carriers) RN - 0 (Indoles) RN - 0 (Protein Kinase Inhibitors) RN - 0 (Pyrroles) RN - 0 (Sericins) RN - V99T50803M (Sunitinib) SB - IM MH - Antineoplastic Agents/administration & dosage/chemistry/*metabolism MH - Biological Availability MH - *Cell Membrane Permeability MH - Cell Survival/drug effects MH - *Click Chemistry MH - Dose-Response Relationship, Drug MH - *Drug Carriers MH - Drug Compounding MH - Female MH - HeLa Cells MH - Humans MH - Indoles/administration & dosage/chemistry/*metabolism MH - Inhibitory Concentration 50 MH - Protein Kinase Inhibitors/administration & dosage/chemistry/*metabolism MH - Pyrroles/administration & dosage/chemistry/*metabolism MH - Sericins/*chemical synthesis MH - Solubility MH - Spectrophotometry, Ultraviolet MH - Spectroscopy, Fourier Transform Infrared MH - Sunitinib MH - Technology, Pharmaceutical/methods MH - Uterine Cervical Neoplasms/*drug therapy/metabolism/pathology PMC - PMC8240991 OTO - NOTNLM OT - Sericin OT - bioavailability OT - bioconjugates OT - cell permeability OT - radical grafting OT - sunitinib EDAT- 2017/02/10 06:00 MHDA- 2017/04/04 06:00 PMCR- 2017/02/09 CRDT- 2017/02/10 06:00 PHST- 2017/02/10 06:00 [entrez] PHST- 2017/02/10 06:00 [pubmed] PHST- 2017/04/04 06:00 [medline] PHST- 2017/02/09 00:00 [pmc-release] AID - 1267822 [pii] AID - 10.1080/10717544.2016.1267822 [doi] PST - ppublish SO - Drug Deliv. 2017 Nov;24(1):482-490. doi: 10.1080/10717544.2016.1267822.