Dry powder inhalation of macromolecules using novel PEG-co-polyester microparticle carriers
This study investigated optimizing the formulation parameters for encapsulation of a model mucinolytic enzyme, α-chymotrypsin (α-CH), within a novel polymer; poly(ethylene glycol)-co-poly(glycerol adipate-co-ω-pentadecalactone), PEG-co-(PGA-co-PDL) which were then applied to the formulation of DNase...
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Published in | International journal of pharmaceutics Vol. 441; no. 1-2; pp. 611 - 619 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
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Netherlands
Elsevier B.V
30.01.2013
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Abstract | This study investigated optimizing the formulation parameters for encapsulation of a model mucinolytic enzyme, α-chymotrypsin (α-CH), within a novel polymer; poly(ethylene glycol)-co-poly(glycerol adipate-co-ω-pentadecalactone), PEG-co-(PGA-co-PDL) which were then applied to the formulation of DNase I. α-CH or DNase I loaded microparticles were prepared via spray drying from double emulsion (w1/o/w2) utilizing chloroform (CHF) as the organic solvent, l-leucine as a dispersibility enhancer and an internal aqueous phase (w1) containing PEG4500 or Pluronic® F-68 (PLF68). α-CH released from microparticles was investigated for bioactivity using the azocasein assay and the mucinolytic activity was assessed utilizing the degradation of mucin suspension assay. The chemical structure of PEG-co-(PGA-co-PDL) was characterized by 1H NMR and FT-IR with both analyses confirming PEG incorporated into the polymer backbone, and any unreacted units removed. Optimum formulation α-CH-CHF/PLF68, 1% produced the highest bioactivity, enzyme encapsulation (20.08±3.91%), loading (22.31±4.34μg/mg), FPF (fine particle fraction) (37.63±0.97%); FPD (fine particle dose) (179.88±9.43μg), MMAD (mass median aerodynamic diameter) (2.95±1.61μm), and the mucinolytic activity was equal to the native non-encapsulated enzyme up to 5h. DNase I-CHF/PLF68, 1% resulted in enzyme encapsulation (17.44±3.11%), loading (19.31±3.27μg/mg) and activity (81.9±2.7%). The results indicate PEG-co-(PGA-co-PDL) can be considered as a potential biodegradable polymer carrier for dry powder inhalation of macromolecules for treatment of local pulmonary diseases. |
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AbstractList | This study investigated optimizing the formulation parameters for encapsulation of a model mucinolytic enzyme, α-chymotrypsin (α-CH), within a novel polymer; poly(ethylene glycol)-co-poly(glycerol adipate-co-ω-pentadecalactone), PEG-co-(PGA-co-PDL) which were then applied to the formulation of DNase I. α-CH or DNase I loaded microparticles were prepared via spray drying from double emulsion (w(1)/o/w(2)) utilizing chloroform (CHF) as the organic solvent, L-leucine as a dispersibility enhancer and an internal aqueous phase (w(1)) containing PEG4500 or Pluronic(®) F-68 (PLF68). α-CH released from microparticles was investigated for bioactivity using the azocasein assay and the mucinolytic activity was assessed utilizing the degradation of mucin suspension assay. The chemical structure of PEG-co-(PGA-co-PDL) was characterized by (1)H NMR and FT-IR with both analyses confirming PEG incorporated into the polymer backbone, and any unreacted units removed. Optimum formulation α-CH-CHF/PLF68, 1% produced the highest bioactivity, enzyme encapsulation (20.08±3.91%), loading (22.31±4.34 μg/mg), FPF (fine particle fraction) (37.63±0.97%); FPD (fine particle dose) (179.88±9.43 μg), MMAD (mass median aerodynamic diameter) (2.95±1.61 μm), and the mucinolytic activity was equal to the native non-encapsulated enzyme up to 5h. DNase I-CHF/PLF68, 1% resulted in enzyme encapsulation (17.44±3.11%), loading (19.31±3.27 μg/mg) and activity (81.9±2.7%). The results indicate PEG-co-(PGA-co-PDL) can be considered as a potential biodegradable polymer carrier for dry powder inhalation of macromolecules for treatment of local pulmonary diseases. This study investigated optimizing the formulation parameters for encapsulation of a model mucinolytic enzyme, α-chymotrypsin (α-CH), within a novel polymer; poly(ethylene glycol)-co-poly(glycerol adipate-co-ω-pentadecalactone), PEG-co-(PGA-co-PDL) which were then applied to the formulation of DNase I. α-CH or DNase I loaded microparticles were prepared via spray drying from double emulsion (w1/o/w2) utilizing chloroform (CHF) as the organic solvent, l-leucine as a dispersibility enhancer and an internal aqueous phase (w1) containing PEG4500 or Pluronic® F-68 (PLF68). α-CH released from microparticles was investigated for bioactivity using the azocasein assay and the mucinolytic activity was assessed utilizing the degradation of mucin suspension assay. The chemical structure of PEG-co-(PGA-co-PDL) was characterized by 1H NMR and FT-IR with both analyses confirming PEG incorporated into the polymer backbone, and any unreacted units removed. Optimum formulation α-CH-CHF/PLF68, 1% produced the highest bioactivity, enzyme encapsulation (20.08±3.91%), loading (22.31±4.34μg/mg), FPF (fine particle fraction) (37.63±0.97%); FPD (fine particle dose) (179.88±9.43μg), MMAD (mass median aerodynamic diameter) (2.95±1.61μm), and the mucinolytic activity was equal to the native non-encapsulated enzyme up to 5h. DNase I-CHF/PLF68, 1% resulted in enzyme encapsulation (17.44±3.11%), loading (19.31±3.27μg/mg) and activity (81.9±2.7%). The results indicate PEG-co-(PGA-co-PDL) can be considered as a potential biodegradable polymer carrier for dry powder inhalation of macromolecules for treatment of local pulmonary diseases. This study investigated optimizing the formulation parameters for encapsulation of a model mucinolytic enzyme, α-chymotrypsin (α-CH), within a novel polymer; poly(ethylene glycol)-co-poly(glycerol adipate-co-ω-pentadecalactone), PEG-co-(PGA-co-PDL) which were then applied to the formulation of DNase I. α-CH or DNase I loaded microparticles were prepared via spray drying from double emulsion (w₁/o/w₂) utilizing chloroform (CHF) as the organic solvent, l-leucine as a dispersibility enhancer and an internal aqueous phase (w₁) containing PEG4500 or Pluronic® F-68 (PLF68). α-CH released from microparticles was investigated for bioactivity using the azocasein assay and the mucinolytic activity was assessed utilizing the degradation of mucin suspension assay. The chemical structure of PEG-co-(PGA-co-PDL) was characterized by ¹H NMR and FT-IR with both analyses confirming PEG incorporated into the polymer backbone, and any unreacted units removed. Optimum formulation α-CH-CHF/PLF68, 1% produced the highest bioactivity, enzyme encapsulation (20.08±3.91%), loading (22.31±4.34μg/mg), FPF (fine particle fraction) (37.63±0.97%); FPD (fine particle dose) (179.88±9.43μg), MMAD (mass median aerodynamic diameter) (2.95±1.61μm), and the mucinolytic activity was equal to the native non-encapsulated enzyme up to 5h. DNase I-CHF/PLF68, 1% resulted in enzyme encapsulation (17.44±3.11%), loading (19.31±3.27μg/mg) and activity (81.9±2.7%). The results indicate PEG-co-(PGA-co-PDL) can be considered as a potential biodegradable polymer carrier for dry powder inhalation of macromolecules for treatment of local pulmonary diseases. |
Author | Somavarapu, Satyanarayana Evans, Andrew R. Mohammed, Afzal R. Shabir, Anjum Tawfeek, Hesham M. Hutcheon, Gillian A. Iftikhar, Abid Saleem, Imran Y. |
Author_xml | – sequence: 1 givenname: Hesham M. surname: Tawfeek fullname: Tawfeek, Hesham M. organization: School of Pharmacy & Biomolecular Sciences, Liverpool John Moores University, Liverpool, UK – sequence: 2 givenname: Andrew R. surname: Evans fullname: Evans, Andrew R. organization: School of Pharmacy & Biomolecular Sciences, Liverpool John Moores University, Liverpool, UK – sequence: 3 givenname: Abid surname: Iftikhar fullname: Iftikhar, Abid organization: School of Pharmacy & Biomolecular Sciences, Liverpool John Moores University, Liverpool, UK – sequence: 4 givenname: Afzal R. surname: Mohammed fullname: Mohammed, Afzal R. organization: Aston Pharmacy School, Aston University, Birmingham, UK – sequence: 5 givenname: Anjum surname: Shabir fullname: Shabir, Anjum organization: Aston Pharmacy School, Aston University, Birmingham, UK – sequence: 6 givenname: Satyanarayana surname: Somavarapu fullname: Somavarapu, Satyanarayana organization: UCL School of Pharmacy, 29-39 Brunswick Square, London, UK – sequence: 7 givenname: Gillian A. surname: Hutcheon fullname: Hutcheon, Gillian A. organization: School of Pharmacy & Biomolecular Sciences, Liverpool John Moores University, Liverpool, UK – sequence: 8 givenname: Imran Y. surname: Saleem fullname: Saleem, Imran Y. email: I.Saleem@ljmu.ac.uk organization: School of Pharmacy & Biomolecular Sciences, Liverpool John Moores University, Liverpool, UK |
BackLink | https://www.ncbi.nlm.nih.gov/pubmed/23124106$$D View this record in MEDLINE/PubMed |
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Keywords | Pulmonary drug delivery Dry powder inhalation Polyester polymer Macromolecules Microparticles |
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SubjectTerms | Administration, Inhalation Animals biodegradability breathing Bronchi - cytology Bronchi - metabolism chemical structure chloroform Chymotrypsin - administration & dosage Chymotrypsin - pharmacology deoxyribonuclease I Deoxyribonuclease I - administration & dosage Deoxyribonuclease I - pharmacology dispersibility Drug Carriers - chemistry Drug Delivery Systems Dry powder inhalation Dry Powder Inhalers Emulsions encapsulation Epithelial Cells - metabolism ethylene glycol Fourier transform infrared spectroscopy glycerol Humans Macromolecules Microparticles Microspheres mucins Mucins - metabolism nuclear magnetic resonance spectroscopy Particle Size Poloxamer - chemistry Polyester polymer Polyesters - chemistry Polyethylene Glycols - chemistry polymers Pulmonary drug delivery respiratory tract diseases solvents spray drying Swine Time Factors |
Title | Dry powder inhalation of macromolecules using novel PEG-co-polyester microparticle carriers |
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