title: Alginate-PLL cell encapsulation system Co-entrapping PLGA-microspheres for the continuous release of anti-inflammatory drugs.
abstract: In spite of advances in cell microencapsulation technology in the past three decades, this approach still suffers from obstacles associated with its biocompatibility. We hypothesized that encapsulation system, which incorporates polymeric particles releasing anti-inflammatory drug in addition to the encapsulated cells, will result in improved biocompatibility, thus improving therapeutic efficacy. We have developed, optimized and studied a combined microencapsulation system in which Ibuprofen loaded PLGA microspheres (MS) are co-entrapped with cells. The combined system was developed and optimized in terms of Ibuprofen release profile, and the survival and proliferation of the co-encapsulated cells. The biocompatibility of the system was evaluated in vitro and in vivo. The developed system was shown to release Ibuprofen within two weeks, and support long-term cell viability. The combined system had improved the biocompatibility within the release period of Ibuprofen. All together, the co-encapsulation of anti-inflammatory loaded MS along with cells offers a clear advantage in the development of effective, long lasting cell based drug delivery systems. The choice of the anti-inflammatory agent, or combination of several anti-inflammatory agents needs to be carefully optimized, as well as their release profile to achieve long- term biocompatibility.
authors.affiliation: Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa, Israel.
authors.forename: Limor
authors.initials: L
authors.lastname: Baruch
authors.forename: Ofra
authors.initials: O
authors.lastname: Benny
authors.forename: Ariel
authors.initials: A
authors.lastname: Gilert
authors.forename: Marina
authors.initials: M
authors.lastname: Ukobnik
authors.forename: Ofer
authors.initials: O
authors.lastname: Ben Itzhak
authors.forename: Marcelle
authors.initials: M
authors.lastname: Machluf
mesh_terms: D000464:Alginates / Q000737:chemistry*; D000818:Animals; D000893:Anti-Inflammatory Agents / Q000008:administration & dosage / Q000737:chemistry / Q000378:metabolism*; D002214:Capsules; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D006224:Cricetinae; D003692:Delayed-Action Preparations; D004337:Drug Carriers / Q000737:chemistry* / Q000633:toxicity; D005240:Feasibility Studies; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D007052:Ibuprofen / Q000008:administration & dosage / Q000737:chemistry / Q000378:metabolism*; D019344:Lactic Acid / Q000737:chemistry*; D008297:Male; D008422:Materials Testing; D051379:Mice; D008863:Microspheres; D011100:Polyglycolic Acid / Q000737:chemistry*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011107:Polylysine / Q000737:chemistry*
chemical_list: D000464:Alginates; D000893:Anti-Inflammatory Agents; D002214:Capsules; D003692:Delayed-Action Preparations; D004337:Drug Carriers; D006603:Hexuronic Acids; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011107:Polylysine; D011100:Polyglycolic Acid; D019344:Lactic Acid; D020723:Glucuronic Acid; D007052:Ibuprofen