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Faragò S, Lucconi G, Perteghella S, Vigani B, Tripodo G, Sorrenti M, Catenacci L, Boschi A, Faustini M, Vigo D, Chlapanidas T, Marazzi M, Torre ML. A dry powder formulation from silk fibroin microspheres as a topical auto-gelling device. Pharm Dev Technol 2015; 21:453-62. [PMID: 25757645 DOI: 10.3109/10837450.2015.1022784] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
With the aim of establishing the formulation of a new hydrophilic auto-gelling medical device for biomedical applications, fibroin-based microspheres were prepared. The proposed microspheres were produced by a cost-effective and industrially scalable technique, such as the spray-drying. Spray-dried silk fibroin microspheres were obtained and the effects of different hydrophilic polymer on the process yield, microsphere morphology and conformation transition of fibroin were evaluated. The final auto-gelling formulations were obtained by adding calcium gluconate (as a calcium source for alginate crosslinking) to the prepared microspheres and tested by an in vitro gelling test. This study showed that the combination of fibroin with sodium alginate and poloxamer produced the most promising auto-gelling formulation for specific biomedical applications, such as the treatment of pressure ulcers.
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Affiliation(s)
- Silvio Faragò
- a Silk Division , Innovhub, Stazioni Sperimentali per l'Industria , Milan , Italy
| | - Giulia Lucconi
- b Department of Drug Sciences , University of Pavia , Pavia , Italy
| | - Sara Perteghella
- b Department of Drug Sciences , University of Pavia , Pavia , Italy
| | - Barbara Vigani
- b Department of Drug Sciences , University of Pavia , Pavia , Italy
| | - Giuseppe Tripodo
- b Department of Drug Sciences , University of Pavia , Pavia , Italy
| | - Milena Sorrenti
- b Department of Drug Sciences , University of Pavia , Pavia , Italy
| | - Laura Catenacci
- b Department of Drug Sciences , University of Pavia , Pavia , Italy
| | - Alessandra Boschi
- a Silk Division , Innovhub, Stazioni Sperimentali per l'Industria , Milan , Italy
| | - Massimo Faustini
- c Department of Veterinary Science and Public Health , University of Milan , Milan , Italy , and
| | - Daniele Vigo
- c Department of Veterinary Science and Public Health , University of Milan , Milan , Italy , and
| | | | - Mario Marazzi
- d Struttura Semplice Tissue Therapy, Niguarda Hospital , Milan , Italy
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Catenacci L, Mandracchia D, Sorrenti M, Colombo L, Serra M, Tripodo G. In-Solution Structural Considerations by1H NMR and Solid-State Thermal Properties of Inulin-d-α-Tocopherol Succinate (INVITE) Micelles as Drug Delivery Systems for Hydrophobic Drugs. MACROMOL CHEM PHYS 2014. [DOI: 10.1002/macp.201400342] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Laura Catenacci
- Department of Drug Sciences; University of Pavia; Viale Taramelli 12 27100 Pavia Italy
| | - Delia Mandracchia
- Department of Pharmacy; University of Bari “Aldo Moro”; Via Orabona 4 70125 Bari Italy
| | - Milena Sorrenti
- Department of Drug Sciences; University of Pavia; Viale Taramelli 12 27100 Pavia Italy
| | - Lino Colombo
- Department of Drug Sciences; University of Pavia; Viale Taramelli 12 27100 Pavia Italy
| | - Massimo Serra
- Department of Drug Sciences; University of Pavia; Viale Taramelli 12 27100 Pavia Italy
| | - Giuseppe Tripodo
- Department of Drug Sciences; University of Pavia; Viale Taramelli 12 27100 Pavia Italy
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Polyalkylcyanoacrylates as in situ formed diffusion barriers in multimaterial drug carriers. J Control Release 2013; 169:321-8. [PMID: 23462672 DOI: 10.1016/j.jconrel.2013.02.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 02/01/2013] [Accepted: 02/14/2013] [Indexed: 11/24/2022]
Abstract
Polymeric hydrogels typically release their drug payload rapidly due to their high water content and the diffusivity for drug molecules. This study proposes a multimaterial system to sustain the release by covering the hydrogel with a poly(alkyl-2-cyanoacrylate) [PACA]-based film, which should be formed by an in situ polymerization on the hydrogel surface initiated upon contact with water. A series of PACA-hydrogel hybrid systems with increasing PACA side chain hydrophobicity was prepared using physically crosslinked alginate films and hydrophilic diclofenac sodium as model hydrogel/drug system. Successful synthesis of PACA at the hydrogel surface was confirmed and the PACA layer was identified to be most homogeneous for poly(n-butyl-2-cyanoacrylate) on both the micro- and nanolevel. At the same time, the diclofenac release from the hybrid systems was substantially sustained from ~1day for unmodified hydrogels up to >14days depending on the type of PACA employed as diffusion barrier. Overall, in situ polymerized PACA films on hydrogels may be widely applicable to various hydrogel matrices, different matrix sizes as well as more complex shaped hydrogel carriers.
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