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Almassri N, Trujillo FJ, Terefe NS. Microencapsulation technology for delivery of enzymes in ruminant feed. Front Vet Sci 2024; 11:1352375. [PMID: 39071783 PMCID: PMC11273329 DOI: 10.3389/fvets.2024.1352375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 06/17/2024] [Indexed: 07/30/2024] Open
Abstract
The ruminant digestive system is uniquely designed to make efficient use of high-fibre feed, including forages. Between 40 to 100% of the ruminant diet consists of forages which are high in fibre and up to 70% of this may remain undigested in the ruminant gut, with substantial impact on feed utilisation rate and productivity and the economic and environmental sustainability of livestock production systems. In ruminants, feed costs can make up to 70% of the overall cost of producing an animal product. Increasing feed utilisation efficiency, i.e., more production with less feed lowers feeding costs and improves livestock economic viability. Strategies for improving nutrient utilisation in animal feed has been investigated over the years. Incorporation of fibre digesting enzymes in the feed to facilitate the digestion of the residual fibre in hind gut is one of the proposed strategies. However, delivering such enzymes to the hind gut in active state is challenging due to the unfavourable biochemical environment (pH, microbial proteases) of ruminant's gastrointestinal tract. This review discusses the potential application of microencapsulation for protected and targeted delivery of enzymes into the hind gut of ruminants.
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Affiliation(s)
- Nada Almassri
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Agriculture and Food, Werribee, VIC, Australia
- School of Chemical Engineering, The University of New South Wales, Sydney, NSW, Australia
| | - Francisco J. Trujillo
- School of Chemical Engineering, The University of New South Wales, Sydney, NSW, Australia
| | - Netsanet Shiferaw Terefe
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Agriculture and Food, Werribee, VIC, Australia
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Patel HP, Vasandia AV, Jha R, Desai BV, Desai DT, Dedhiya PP, Vyas BA, Maulvi FA. Intranasal delivery of doxepin: enhancing brain targeting efficiency utilizing nanostructured lipid carriers for a biopharmaceutics drug disposition classification system class-I drug. Pharm Dev Technol 2024; 29:639-647. [PMID: 38980085 DOI: 10.1080/10837450.2024.2376102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 06/25/2024] [Accepted: 07/01/2024] [Indexed: 07/10/2024]
Abstract
Doxepin, a Class-I Biopharmaceutics Drug Disposition Classification System (BDDCS) drug, exhibits poor bioavailability due to extensive first-pass metabolism. This research focuses on enhancing the delivery of doxepin by formulating nanostructured lipid carriers (NLCs) through the utilization of the Box-Behnken Design methodology. These optimized NLCs are intended for intranasal administration, with the ultimate goal of improving nose-to-brain drug delivery. NLCs were formulated using a high-speed homogenization technique. The optimized batch had a small particle size (75.80 ± 5.48 nm, PDI = 0.286), high entrapment efficiency (94.10 ± 0.16%), and sustained ex vivo release (82.25 ± 4.61% at 24 h). Characterization studies confirmed the conversion of doxepin from a crystalline to an amorphous state with uniform distribution in the lipid matrix. In vivo pharmacokinetic studies in rats showed significantly higher doxepin concentration in the brain tissue (Cmax = 16.77 µg/g, tmax = 30 min) after intranasal administration compared to intravenous administration (Cmax = 2.53 µg/g, tmax = 6 h). High-drug targeting efficiency (DTE = 284.3%) and direct transport percentage (DTP = 64.8%) suggested direct penetration of NLCs in the brain via olfactory and trigeminal pathways. In conclusion, the study highlights the potential of NLCs to improve the bioavailability of doxepin through nose-to-brain delivery and thereby potentially enable the treatment of neurological disorders.
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Affiliation(s)
- Hetal P Patel
- Department of Pharmaceutics, Maliba Pharmacy College, Uka Tarsadia University, Surat, India
| | - Ayushi V Vasandia
- Department of Pharmaceutics, Maliba Pharmacy College, Uka Tarsadia University, Surat, India
| | - Rahul Jha
- Department of Pharmaceutics, Maliba Pharmacy College, Uka Tarsadia University, Surat, India
| | - Bhargavi V Desai
- Department of Pharmaceutics, Maliba Pharmacy College, Uka Tarsadia University, Surat, India
| | - Ditixa T Desai
- Department of Pharmaceutics, Maliba Pharmacy College, Uka Tarsadia University, Surat, India
| | - Praful P Dedhiya
- Department of Pharmaceutics, Maliba Pharmacy College, Uka Tarsadia University, Surat, India
| | - Bhavin A Vyas
- Department of Pharmaceutics, Maliba Pharmacy College, Uka Tarsadia University, Surat, India
| | - Furqan A Maulvi
- School of Optometry and Vision, University of New South Wales, Sydney, New South Wales, Australia
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Preparation and Evaluation of Dual–release Esomeprazole Magnesium Pulsed Capsules Filled with Two Kinds of Enteric-coated Pellets. J Pharm Innov 2022. [DOI: 10.1007/s12247-022-09683-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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4
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Aničić N, Smrdel P, Kitak D, Morožin T, Jaklič M, Usenik P, Vidovič S. Applicability of Image Analysis to Support QbD driven Development of Pellets. Drug Dev Ind Pharm 2022; 47:1794-1808. [PMID: 35389314 DOI: 10.1080/03639045.2022.2063880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Objective The stages of preparing high drug loaded pellets were investigated using static and dynamic imaging techniques to provide a greater understanding and ease the scale up process. Significance: An example of a real case laboratory and production scale Quality by design (QbD) based development of pellets is demonstrated. Potential Process analytical technology (PAT) approaches by dynamic image analysis (DIA) are presented in various process phases. Methods: Pellets were prepared at laboratory and production scale (high shear granulation, extrusion/spheronization, drying, coating). The influence of process parameters on pellet properties (aspect ratio, yield, pellet size, and their distribution) was investigated using static and dynamic image analysis. During coating, we focused on the coating thickness and identification of potential agglomeration. Results and conclusions: The effects of kneading time, amount of water, extrusion screen plate (ESP) opening diameter and thickness on pellet properties were confirmed in accordance with literature. In terms of screw speed, spheronization speed and time, no considerable influence on pellet properties was observed in the range of studied process parameters, thereby confirming the design space. . In addition to the ESP thickness and opening diameter, quality of the ESP impacts the pellet properties. Lastly, coating thickness measurements with dynamic and static image analysis were comparable and an exemplary case of in-line agglomeration detection was presented. Real time evaluation with PATVIS APA is an effective PAT tool for the evaluation of spheronization (pellet size distribution, aspect ratio, yield) and coating (coating thickness, agglomeration detection).
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Affiliation(s)
- Nemanja Aničić
- Lek Pharmaceuticals d.d., Verovškova 57, Ljubljana, Slovenia
| | - Polona Smrdel
- Lek Pharmaceuticals d.d., Verovškova 57, Ljubljana, Slovenia
| | - Domen Kitak
- Sensum, Computer Vision Systems d.o.o., Tehnološki park 21, Ljubljana, Slovenia
| | - Teo Morožin
- Lek Pharmaceuticals d.d., Verovškova 57, Ljubljana, Slovenia
| | - Miha Jaklič
- Lek Pharmaceuticals d.d., Verovškova 57, Ljubljana, Slovenia
| | - Peter Usenik
- Sensum, Computer Vision Systems d.o.o., Tehnološki park 21, Ljubljana, Slovenia
| | - Sara Vidovič
- Lek Pharmaceuticals d.d., Verovškova 57, Ljubljana, Slovenia.,Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, Ljubljana, Slovenia
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5
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Suo M, Zhao X, Yu G, Zhang W. Lidocaine loaded nanostructured lipid carriers for prolonged local anesthesia: in vitro and in vivo studies. J DISPER SCI TECHNOL 2022. [DOI: 10.1080/01932691.2020.1844739] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Meng Suo
- Department of Anesthesiology, Shandong Provincial Hospital, Shandong First Medical University, Jinan, Shandong, China
| | - Xu Zhao
- Department of Anesthesiology, Shandong Provincial Hospital, Shandong First Medical University, Jinan, Shandong, China
| | - Guanling Yu
- IVF laboratory, Center for Reproductive Medicine, Shandong University, Jinan, Shandong, China
| | - Wenjia Zhang
- Department of Anesthesiology, Shandong Provincial Hospital, Shandong First Medical University, Jinan, Shandong, China
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Tang X, Yang M, Gu Y, Jiang L, Du Y, Liu J. Orally Deliverable Dual-Targeted Pellets for the Synergistic Treatment of Ulcerative Colitis. DRUG DESIGN DEVELOPMENT AND THERAPY 2021; 15:4105-4123. [PMID: 34616144 PMCID: PMC8489837 DOI: 10.2147/dddt.s322702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 08/23/2021] [Indexed: 12/15/2022]
Abstract
Purpose The effective treatment of ulcerative colitis (UC) poses substantial challenges, and the aetiopathogenesis of UC is closely related to infectious, immunological and environmental factors. Currently, there is a considerable need for the development of orally bioavailable dosage forms that enable the effective delivery of therapeutic drugs to local diseased lesions in the gastrointestinal tract. Methods Berberine (BBR) and Atractylodes macrocephala Koidz (AM) volatile oil, derived from the Chinese herbs Coptis chinensis Franch and Atractylodes macrocephala Koidz, have anti-inflammatory and immunomodulatory activities. In this study, we prepared colon-targeted pellets loaded with BBR and stomach-targeted pellets loaded with AM volatile oil for the synergistic treatment of UC. The Box-Behnken design and β-cyclodextrin inclusion technique were used to optimize the enteric coating formula and prepare volatile oil inclusion compounds. Results The two types of pellets were spherical and had satisfactory physical properties. The pharmacokinetic results showed that the AUC and MRT values of the dual-targeted (DPs) pellets were higher than those of the control pellets. In addition, in vivo animal imaging confirmed that the DPs could effectively deliver BBR to the colon. Moreover, compared with sulfasalazine and monotherapy, DPs exerted a more significant anti-inflammatory effect by inhibiting the expression of inflammatory factors including IL-1β, IL-4, IL-6, TNF-α and MPO both in serum and tissues and enhancing immunity by decreasing the production of IgA and IgG. Conclusion The DPs play a synergistic anti-UC effect by exerting systemic and local anti-inflammatory and provide an effective oral targeted preparation for the treatment of UC.
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Affiliation(s)
- Xiaomeng Tang
- Department of Pharmacy, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, 200032, People's Republic of China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, People's Republic of China.,Department of Pharmacy, Changhai Hospital, Naval Medical University, Shanghai, 200433, People's Republic of China
| | - Meng Yang
- Department of Pharmacy, Shanghai Ninth People Hospital, Shanghai Jiao Tong University, Shanghai, 200011, People's Republic of China
| | - Yongwei Gu
- Department of Pharmacy, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, 200032, People's Republic of China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, People's Republic of China
| | - Liangdi Jiang
- Department of Pharmacy, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, 200032, People's Republic of China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, People's Republic of China.,College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, Shandong, 250355, People's Republic of China
| | - Yue Du
- Department of Pharmacy, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, 200032, People's Republic of China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, People's Republic of China.,College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, Shandong, 250355, People's Republic of China
| | - Jiyong Liu
- Department of Pharmacy, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, 200032, People's Republic of China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, People's Republic of China.,Department of Pharmacy, Changhai Hospital, Naval Medical University, Shanghai, 200433, People's Republic of China
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Bhagwat A, Pathan IB, Chishti NAH. Design and optimization of pellets formulation containing curcumin ascorbic acid co-amorphous mixture for ulcerative colitis management. PARTICULATE SCIENCE AND TECHNOLOGY 2021. [DOI: 10.1080/02726351.2020.1848946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Ajay Bhagwat
- Department of Pharmaceutics, Government College of Pharmacy, Aurangabad, India
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Topical delivery of cyclosporine loaded tailored niosomal nanocarriers for improved skin penetration and deposition in psoriasis: Optimization, ex vivo and animal studies. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102441] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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9
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Sun J, Liu J, Zhang J, Xia H. Meclizine-loaded nanostructured lipid carriers to manage nausea and vomiting: Oral bioavailability improvement. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Guo B, Qiao F, Liao Y, Song L, He J. Triptolide laden reduced graphene oxide transdermal hydrogel to manage knee arthritis: in vitro and in vivo studies. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2021; 32:1288-1300. [PMID: 33797338 DOI: 10.1080/09205063.2021.1912976] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Triptolide (extract of herb Tripterygium wilfordii) is widely used in rheumatoid arthritis due to its potent immunosuppressant effect. The marketed oral (tablet dosage forms) and parenteral injections have short duration of action (half-life = 38 min) and not limited to multiorgan toxicity, which restrict the use of triptolide in clinical practice. In this study, a triptolide-loaded Pluronic® F68-reduced graphene oxide transdermal (non-invasive) hydrogel was developed to achieve sustained release of triptolide. Fourier transform infrared spectroscopy, X-ray diffraction, and Raman spectroscopy confirmed the synthesis of Pluronic® F68-reduced graphene oxide. Transmission electron microscopy showed flat wrinkled-nanosheets. The developed hydrogel showed desirable viscosity (11,261-11,365 cps), adhesiveness (0.25 mJ), hardness (6.5 g), and cohesiveness (1.85) for transdermal application. The ex vivo release study demonstrated the ability of the Pluronic® F68-reduced graphene oxide hydrogel to prolong release up to 14 h (63.64-96.78%), owing to the strong π-π interactions between the graphene oxide and the triptolide. The in vivo pharmacokinetic parameters in the rat model confirmed the improvement in the relative bioavailability (3.3-fold) with Pluronic® F68-reduced graphene oxide hydrogel in comparison to the control hydrogel without reduced graphene oxide. The anti-rheumatoid efficacy model suggest the potential application of Pluronic® F68-reduced graphene oxide hydrogel to treat knee rheumatoid arthritis (70-75% resolution) to substitute tablets and parenteral injections.
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Affiliation(s)
- Binghua Guo
- Department of Orthopedics combined TCM with Western Medicine, Honghui Hospital, Xi'an Jiaotong University, No. 555 Youyi East Road, Beilin, Xi'an, Shaanxi, 710054, China
| | - Feng Qiao
- Department of Orthopedics combined TCM with Western Medicine, Honghui Hospital, Xi'an Jiaotong University, No. 555 Youyi East Road, Beilin, Xi'an, Shaanxi, 710054, China
| | - Yonghua Liao
- Department of Orthopedics combined TCM with Western Medicine, Honghui Hospital, Xi'an Jiaotong University, No. 555 Youyi East Road, Beilin, Xi'an, Shaanxi, 710054, China
| | - Lianjin Song
- Department of Traditional Chinese Medicine, High-Tech Hospital, Xi'an, Shaanxi, China
| | - Jinlong He
- Department of Orthopedics combined TCM with Western Medicine, Honghui Hospital, Xi'an Jiaotong University, No. 555 Youyi East Road, Beilin, Xi'an, Shaanxi, 710054, China
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Singh A, Mandal UK, Narang RK. Development and characterization of enteric coated pectin pellets containing mesalamine and Saccharomyces boulardii for specific inflamed colon: In vitro and in vivo evaluation. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102393] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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12
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Patel HP, Chaudhari PS, Gandhi PA, Desai BV, Desai DT, Dedhiya PP, Vyas BA, Maulvi FA. Nose to brain delivery of tailored clozapine nanosuspension stabilized using (+)-alpha-tocopherol polyethylene glycol 1000 succinate: Optimization and in vivo pharmacokinetic studies. Int J Pharm 2021; 600:120474. [PMID: 33737093 DOI: 10.1016/j.ijpharm.2021.120474] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 03/03/2021] [Accepted: 03/05/2021] [Indexed: 01/03/2023]
Abstract
Clozapine is widely used to treat schizophrenia as an atypical antipsychotic. Low solubility, poor dissolution rate, degradation in the gastrointestinal tract, high hepatic first-pass metabolism, and eventually less drug transfer in the brain are all issues with oral clozapine administration. On account of this poor pharmacokinetic parameters, the authors aimed to develop clozapine nanosuspension using (+)-alpha-tocopherol polyethylene glycol 1000 succinate (TPGS) and polyvinylpyrrolidone K-30 (PVP K-30) and deliver it through the intranasal route. The nanosuspension was prepared by the high-speed homogenization method with 32 full factorial design for optimization of the product. Quality Target Product Profile (QTPP) was enlisted before the product development. The amount of TPGS and speed of homogenizer were selected as independent variables whereas, particle size and drug permeation profile after 24 h (Y2, %) were selected as dependent variables. As per the results of optimization, amount of TPGS and speed of homogenizer were chosen as 0.1% and 7000 rpm, respectively. The particle size of the optimized nanosuspension of clozapine was found to be 281 nm. The conversion of clozapine crystals to an amorphous form was verified by characterization studies (XRD and DSC). The drug permeability study showed 96.15% and 41.12% clozapine release after 24 h from nanosuspension and conventional suspension, respectively. The study of nasal cilio-toxicity (histopathological studies) demonstrated the appropriateness of nanosuspension for intranasal purposes. The single-dose in vivo pharmacokinetic analysis in the rat model showed a substantial increase in the therapeutic concentration of clozapine in the brain tissue in the case of intranasal nanosuspension (dose = 0.05 mg drug/0.1 mL, Cmax = 8.62 ± 0.45 μg/g, tmax = 1 h) compared to conventional oral clozapine suspension (dose = 26.43 mg drug/0.158 mL, Cmax = 1.14 ± 0.12 μg/g, tmax = 1 h).Ultimately, in the case of an intranasal route, a 3.56-fold increase in brain drug concentration was observed with a 528-fold lower drug dose compared with oral administration. The results suggest that clozapine nanosuspension may be used for successful nose-to-brain delivery.
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Affiliation(s)
- Hetal P Patel
- Maliba Pharmacy College, Uka Tarsadia University, Surat 394350, India
| | | | | | - Bhargavi V Desai
- Maliba Pharmacy College, Uka Tarsadia University, Surat 394350, India
| | - Ditixa T Desai
- Maliba Pharmacy College, Uka Tarsadia University, Surat 394350, India
| | - Praful P Dedhiya
- Maliba Pharmacy College, Uka Tarsadia University, Surat 394350, India
| | - Bhavin A Vyas
- Maliba Pharmacy College, Uka Tarsadia University, Surat 394350, India
| | - Furqan A Maulvi
- Maliba Pharmacy College, Uka Tarsadia University, Surat 394350, India.
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Koli AR, Ranch KM, Patel HP, Parikh RK, Shah DO, Maulvi FA. Oral bioavailability improvement of felodipine using tailored microemulsion: Surface science, ex vivo and in vivo studies. Int J Pharm 2021; 596:120202. [DOI: 10.1016/j.ijpharm.2021.120202] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 12/26/2020] [Accepted: 12/28/2020] [Indexed: 01/24/2023]
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Ranch KM, Maulvi FA, Koli AR, Desai DT, Parikh RK, Shah DO. Tailored Doxycycline Hyclate Loaded In Situ Gel for the Treatment of Periodontitis: Optimization, In Vitro Characterization, and Antimicrobial Studies. AAPS PharmSciTech 2021; 22:77. [PMID: 33595740 DOI: 10.1208/s12249-021-01950-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 02/03/2021] [Indexed: 12/27/2022] Open
Abstract
Currently, periodontitis is treated by oral dosage forms (antibiotics) which shows systemic side effects and failed to reach the therapeutic concentration (above minimum inhibitory concentration, MIC) in the periodontal pocket. The present study aimed to overcome the above issues, by designing tailored doxycycline hyclate laden in situ gel by Poloxamer 407, chitosan, and polyethylene glycol 600. The in situ gel-forming system has attracted attention owing to its ability of sustained drug release above MIC, easy administration (syringeability), and high drug retention (localization) in the periodontal cavity. The Box-Behnken design (BBD) was used to tailor and optimize the concentration of Poloxamer 407 (X1 = 14.3%), chitosan (X2 = 0.58%), and polyethylene glycol 600 (X3 = 1.14%) to achieve sufficient syringeability (149 N), t90% (1105 min), and viscosity at non-physiological condition (512 cps) and physiological condition (5415 cps). The optimized in situ gel was clear and isotonic (RBCs test). The gelation temperature of the optimized in situ was 34 ± 1°C with sufficient mucoadhesive strength (26 ± 2 dyn/cm2), gel strength (29 ± 2 sec), and texture profile for periodontal application. The in vitro drug release studies showed sustain release from optimized in situ gel (24h) in comparison to marketed gel (7h). The antimicrobial activity (cup plate technique) of the in situ gel was equivalent to the marketed doxycycline gel, which suggests that the doxycycline hyclate retained its antimicrobial efficacy when formulated as in situ gelling system. In conclusion, BBD was effectively utilized to optimize in situ gel with minimum level of polymers to achieve the required characteristics of the in situ gel for sustaining drug delivery to treat periodontitis.
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Liu Q, Xu J, Liao K, Tang N. Oral Bioavailability Improvement of Tailored Rosuvastatin Loaded Niosomal Nanocarriers to Manage Ischemic Heart Disease: Optimization, Ex Vivo and In Vivo Studies. AAPS PharmSciTech 2021; 22:58. [PMID: 33502651 DOI: 10.1208/s12249-021-01934-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 01/13/2021] [Indexed: 12/19/2022] Open
Abstract
Rosuvastatin is an efficient antihyperlipidemic agent; however, being a BCS class II molecule, it shows poor oral bioavailability of < 20%. The present study focused on the improvement of oral bioavailability of rosuvastatin using tailored niosomes. The niosomes were prepared by film hydration method and sonication using cholesterol and Span 40. The Box-Behnken design (BBD) was applied to optimize the size (98 nm) and the entrapment efficacy (77%) of the niosomes by selecting cholesterol at 122 mg, Span 40 at 0.52%, and hydration time at 29.88 min. The transmission electron microscopy image showed spherical shape niosomes with smooth surface without aggregation. The ex vivo intestinal permeability studies showed significant improvement in the rosuvastatin permeation (95.5% after 2 h) using niosomes in comparison to the rosuvastatin suspension (40.1% after 2 h). The in vivo pharmacokinetic parameters in the rat model confirmed the improvement in the oral bioavailability with optimized rosuvastatin loaded niosomes (relative bioavailability = 2.01) in comparison to the rosuvastatin suspension, due to high surface area of niosomes and its lymphatic uptake via transcellular route. In conclusion, the optimized rosuvastatin loaded niosomes offers a promising approach to improve the oral bioavailability of rosuvastatin.
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Li W, Zhang G, Wei X. Lidocaine-loaded reduced graphene oxide hydrogel for prolongation of effects of local anesthesia: In vitro and in vivo analyses. J Biomater Appl 2021; 35:1034-1042. [PMID: 33487069 DOI: 10.1177/0885328220988462] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Lidocaine is widely used as a local anesthetic for alleviation of post-operative pain and for management of acute and chronic painful conditions. Although several approaches are currently used to prolong the duration of action, an effective strategy to achieve neural blockage for several hours remains to be identified. In this study, a lidocaine-loaded Pluronic® F68-reduced graphene oxide hydrogel was developed to achieve sustained release of lidocaine. Fourier transform infrared spectroscopy, X-ray diffraction, and Raman spectroscopy confirmed the synthesis of Pluronic® F68-reduced graphene oxide. Transmission electron microscopy showed wrinkled, flat nanosheets with micelles attached. The developed hydrogel showed desirable pH, viscosity, adhesiveness, hardness, and cohesiveness for topical application. The ex vivo release study demonstrated the ability of the Pluronic® F68-reduced graphene oxide hydrogel to prolong release up to 10 h, owing to the strong π-π interactions between the graphene oxide and the lidocaine. In comparison with a commercial lidocaine ointment, the developed graphene oxide hydrogel showed sustained anesthetic effect in the radiant heat tail flick test and sciatic nerve block model. Thus, this study demonstrates the potential of using Pluronic® F68-reduced graphene oxide nanocarriers to realize prolonged effects of local anesthesia for effective pain management.
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Affiliation(s)
- Weifan Li
- Department of Anesthesiology, Jinan Second People's Hospital, Jinan, China
| | - Guangqi Zhang
- Department of Anesthesiology, Jinan Second People's Hospital, Jinan, China
| | - Xiaoxia Wei
- Department of Anesthesiology, Jinan Second People's Hospital, Jinan, China
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Taymouri S, Ahmadi Z, Mirian M, Tavakoli N. Simvastatin nanosuspensions prepared using a combination of pH-sensitive and timed-release approaches for potential treatment of colorectal cancer. Pharm Dev Technol 2021; 26:335-348. [PMID: 33430677 DOI: 10.1080/10837450.2021.1872086] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
A dual pH- and time-dependent polymeric coated capsule was developed to achieve the site specificity of simvastatin (SIM) release in the colon. To improve the SIM solubility, soluplus-based nanosuspension of the drug were prepared by applying the anti-solvent crystallization technique; this was then followed by lyophilization. Particle size, polydispersity index, and saturation solubility were evaluated. The optimized nanosuspension was combined with SLS and freeze-dried before filling into hard gelatin capsules. Drug release characteristics of the coated capsules were studied in HCl 0.1 N, the phosphate buffers 6.8 and 7.4, and the simulated colonic fluid (pH 6.8). The in-vitro cytotoxic effects of SIM nanoparticles against HT29 cells were then evaluated using the MTT assay. The prepared nanoparticles were spherical with a mean size of 261.66 nm, the zeta potential of -18.20 and the dissolution efficiency of 59.71%. X-ray diffraction and differential scanning calorimetry studies showed that the nanosizing technique transformed the crystalline drug into the more soluble amorphous form. The coated capsules had no release in the gastric media, providing the specific delivery of SIM in the colon. The cytotoxic effect of the SIM nanoparticles was significantly increased, as compared to the free SIM. The findings, therefore, showed that the coated capsules using the two polymers of ethyl cellulose and Eudragit S100 could be suitable for the colon target delivery of SIM.
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Affiliation(s)
- Somayeh Taymouri
- Department of Pharmaceutics, School of Pharmacy and Novel Drug Delivery Systems Research Centre, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Zoha Ahmadi
- Department of Pharmaceutics, School of Pharmacy and Novel Drug Delivery Systems Research Centre, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mina Mirian
- Department of Biotechnology, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Naser Tavakoli
- Department of Pharmaceutics, School of Pharmacy and Novel Drug Delivery Systems Research Centre, Isfahan University of Medical Sciences, Isfahan, Iran
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Luo S, Jin S, Yang T, Wu B, Xu C, Luo L, Chen Y. Sustained release of tulobuterol from graphene oxide laden hydrogel to manage asthma. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2020; 32:524-535. [PMID: 33175639 DOI: 10.1080/09205063.2020.1849921] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Bronchial asthma is a chronic disease which is currently treated using various inhalants. However, the medication adherence with the inhalants is poor due to complex procedure to use them along with frequent dosing. In this paper, we have developed tulobuterol loaded Pluronic® F127-reduced graphene oxide transdermal hydrogel to sustain the release of tulobuterol to manage asthma for days. The synthesis of Pluronic® F127-reduced graphene oxide was confirmed by Fourier transform infrared spectroscopy, X-ray diffraction, and Raman spectroscopy. The transmission electron microscope showed wrinkled flat nano sheets. The hydrogel showed sufficient mechanical properties for topical application and was safe in the skin irritation study (rabbit model). The ex vivo release data demonstrated the ability of reduced graphene oxide to sustain the release of tulobuterol for 72 h, due to strong π-π interaction between drug and graphene oxide. The pharmacokinetic profile in Sprague-Dawley rat model confirmed the potential of tulobuterol-Pluronic® F127-reduced graphene oxide hydrogel to sustain the release of tulobuterol for effective management of asthma.
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Affiliation(s)
- Shujuan Luo
- Respiratory Department, Hunan Children's Hospital, Changsha, Hunan, China
| | - Shijie Jin
- Respiratory Department, Hunan Children's Hospital, Changsha, Hunan, China
| | - Ting Yang
- Respiratory Department, Hunan Children's Hospital, Changsha, Hunan, China
| | - Bichen Wu
- Respiratory Department, Hunan Children's Hospital, Changsha, Hunan, China
| | - Chang Xu
- Respiratory Department, Hunan Children's Hospital, Changsha, Hunan, China
| | - Liyan Luo
- Respiratory Department, Hunan Children's Hospital, Changsha, Hunan, China
| | - Yanping Chen
- Respiratory Department, Hunan Children's Hospital, Changsha, Hunan, China
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19
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Wang R, Gan J, Li R, Duan J, Zhou J, Lv M, Qi R. Controlled delivery of ketamine from reduced graphene oxide hydrogel for neuropathic pain: In vitro and in vivo studies. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101964] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Li Q, Li F, Qi X, Wei F, Chen H, Wang T. RETRACTED: Pluronic® F127 stabilized reduced graphene oxide hydrogel for the treatment of psoriasis: In vitro and in vivo studies. Colloids Surf B Biointerfaces 2020; 195:111246. [PMID: 32659651 DOI: 10.1016/j.colsurfb.2020.111246] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 06/28/2020] [Accepted: 07/06/2020] [Indexed: 12/12/2022]
Abstract
This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). This article has been retracted at the request of the Editors. Significant similarities were noticed post-publication between this article and an article submitted to the journal on the same day, by an apparently unrelated research group: Hui Li, Yanlu Jia and Chunling Liu, Colloids and Surfaces B: Biointerfaces 195 (2020) 111259 https://doi.org/10.1016/j.colsurfb.2020.111259. Moreover, the authors did not respond to the journal request to comment on these similarities and to provide the raw data, and the Editors decided to retract the article. One of the conditions of submission of a paper for publication is that authors declare explicitly that their work is original and genuine. As such this article represents a severe abuse of the scientific publishing system. The scientific community takes a very strong view on this matter and apologies are offered to readers of the journal that this was not detected during the submission process. Although this article was published earlier than the article from Colloids and Surfaces B: Biointerfaces 195 (2020) 111259, the Editors decided to retract this article given the concerns on the reliability of the data.
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Affiliation(s)
- Qiang Li
- Department of Dermatology, Air Force Medicine Center, Air Force Military Medical University, Beijing, 100147, China
| | - Fangmei Li
- Department of Dermatology, Guangxi International Zhuang Medicine Hospital, Nanning, Guangxi, 530201, China
| | - Xixi Qi
- Department of Dermatology, Guangxi International Zhuang Medicine Hospital, Nanning, Guangxi, 530201, China
| | - Fuqiao Wei
- Department of Dermatology, Guangxi International Zhuang Medicine Hospital, Nanning, Guangxi, 530201, China
| | - Hongxiao Chen
- Department of Dermatopathology Sipecialist(s), Linyi People's Hospital, Linyi, Shandong, 276003, China
| | - Ting Wang
- Department of Dermatology, PLA 970 Hospital, Weihai, Shandong, 264200, China.
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21
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Broesder A, Kosta AMMAC, Woerdenbag HJ, Nguyen DN, Frijlink HW, Hinrichs WLJ. pH-dependent ileocolonic drug delivery, part II: preclinical evaluation of novel drugs and novel excipients. Drug Discov Today 2020; 25:1374-1388. [PMID: 32562842 DOI: 10.1016/j.drudis.2020.06.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 05/18/2020] [Accepted: 06/08/2020] [Indexed: 01/18/2023]
Abstract
Novel drugs and novel excipients in pH-dependent ileocolonic drug delivery systems have to be tested in animals. Which animal species are suitable and what in vivo methods are used to verify ileocolonic drug delivery?
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Affiliation(s)
- Annemarie Broesder
- University of Groningen, Groningen Research Institute of Pharmacy, Department of Pharmaceutical Technology and Biopharmacy, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Anne-Marijke M A C Kosta
- University of Groningen, University Medical Center Groningen, Department of Biomedical Sciences of Cells and Systems, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Herman J Woerdenbag
- University of Groningen, Groningen Research Institute of Pharmacy, Department of Pharmaceutical Technology and Biopharmacy, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Duong N Nguyen
- University of Groningen, Groningen Research Institute of Pharmacy, Department of Pharmaceutical Technology and Biopharmacy, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Henderik W Frijlink
- University of Groningen, Groningen Research Institute of Pharmacy, Department of Pharmaceutical Technology and Biopharmacy, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Wouter L J Hinrichs
- University of Groningen, Groningen Research Institute of Pharmacy, Department of Pharmaceutical Technology and Biopharmacy, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands.
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Wei N, Xu X, Huang C, Cao L. Hyaluronic Acid-Pluronic®F127-Laden Soft Contact Lenses for Corneal Epithelial Healing: In Vitro and In Vivo Studies. AAPS PharmSciTech 2020; 21:162. [PMID: 32488761 DOI: 10.1208/s12249-020-01714-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 05/13/2020] [Indexed: 01/22/2023] Open
Abstract
Hyaluronic acid (HA) is widely used to treat various ocular diseases like dry eye syndrome, keratoconus, and other corneal epithelial injuries. The currently available eye drop solutions need frequent doses affecting the routine life style of patients. In this work, the silicone contact lens was designed to entrap HA and Pluronic®F127 to improve the wettability of the contact lens to treat various ocular diseases. The soaking method (HA-SM) was compared with the direct entrapment (DL-HA-PI) technique. The HA-Pluronic®F127-laden contact lenses (DL-HA-PI) showed acceptable optical transmittance with improved swelling (water content) properties. The in vitro release data showed high burst release with HA-SM contact lenses (12-36 h), while DL-HA-PI contact lenses showed prolong release up to 96 h. The in vivo release in the rabbit tear fluid showed high HA concentration (tear fluid) with DL-HA-PI contact lenses in comparison to the HA-SM contact lenses. The DL-HA-PI-3 batch with Pluronic®F127 showed more promising results in schirmer strip study in comparison to DL-HA-3 batch (without Pluronic®F127). The presence of Pluronic®F127 with HA showed high potential to improve hydration property of the contact lens. The corneal healing model showed reduction in the ocular inflammatory symptoms with DL-HA-PI-3 batch, thus demonstrating the potential of HA and Pluronic®F127 to be used in various ocular diseases.
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Pandey SS, Patel MA, Desai DT, Patel HP, Gupta AR, Joshi SV, Shah DO, Maulvi FA. Bioavailability enhancement of repaglinide from transdermally applied nanostructured lipid carrier gel: Optimization, in vitro and in vivo studies. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101731] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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24
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Cyclosporine laden tailored microemulsion-gel depot for effective treatment of psoriasis: In vitro and in vivo studies. Colloids Surf B Biointerfaces 2020; 186:110681. [DOI: 10.1016/j.colsurfb.2019.110681] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 11/02/2019] [Accepted: 11/27/2019] [Indexed: 12/29/2022]
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25
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Lidocaine tripotassium phosphate complex laden microemulsion for prolonged local anaesthesia: In vitro and in vivo studies. Colloids Surf B Biointerfaces 2020; 185:110632. [DOI: 10.1016/j.colsurfb.2019.110632] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 10/31/2019] [Accepted: 11/07/2019] [Indexed: 12/28/2022]
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26
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Kaur V, Goyal AK, Ghosh G, Chandra Si S, Rath G. Development and characterization of pellets for targeted delivery of 5-fluorouracil and phytic acid for treatment of colon cancer in Wistar rat. Heliyon 2020; 6:e03125. [PMID: 32042938 PMCID: PMC7000805 DOI: 10.1016/j.heliyon.2019.e03125] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 06/29/2019] [Accepted: 12/23/2019] [Indexed: 01/04/2023] Open
Abstract
The present study was designed to investigate the therapeutic efficacy of metal chelator and anticancer drug in the treatment of colorectal cancer (CRC). Pellets containing Phytic acid, 5- Fluorouracil (5-FU), Microcrystalline cellulose (MCC) PH 101, Hydroxypropyl Methylcellulose (HPMC) and Barium sulfate were prepared by using extrusion spheronization technique. Prepared pellets were coated with Eudragit S100 to achieve colon-specific drug delivery. Pellets were characterized for various pharmaceutical and micromeritic attributes. The in vivo therapeutic efficacy comprising of both pharmacokinetic and pharmacodynamic parameters was determined in Ehrlich ascites carcinoma (EAC) induced cancer animal model. Phytic acid and 5-FU combinations seem to exert higher cytotoxic activity via increased reactive oxygen species (ROS) level by chelating manganese. Further pharmacokinetic studies reveled approximately 50% lower Cmax in the finished formulation, indicates lower systemic exposure to the drug. X-ray radiography ensures the localized delivery of the encapsulated drug. Histopathological studies indicated no significant local toxicity compared to the uncoated formulation. Results inferred that the proposed combination has superior anticancer activity with minimum systemic and local toxicity and it opens a new avenue in the treatment of colorectal cancer.
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Affiliation(s)
- Veerpal Kaur
- Department of Pharmaceutics, I.S.F.College of Pharmacy, Moga, Punjab, India
| | - Amit K. Goyal
- National Institute of Animal Biotechnology, Hyderabad, India
| | - Goutam Ghosh
- Siksha ‘O’ Anusandhan (Deemed to be University), Kalinga Nagar, Bhubaneswar, Odisha, India
| | - Sudam Chandra Si
- Siksha ‘O’ Anusandhan (Deemed to be University), Kalinga Nagar, Bhubaneswar, Odisha, India
| | - Goutam Rath
- Siksha ‘O’ Anusandhan (Deemed to be University), Kalinga Nagar, Bhubaneswar, Odisha, India
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Adeleke OA. Premium ethylcellulose polymer based architectures at work in drug delivery. Int J Pharm X 2019; 1:100023. [PMID: 31517288 PMCID: PMC6733301 DOI: 10.1016/j.ijpx.2019.100023] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 07/02/2019] [Accepted: 07/03/2019] [Indexed: 12/14/2022] Open
Abstract
Premium ethylcellulose polymers are hydrophobic cellulose ether based biomaterials widely employed as biocompatible templates for the design of novel drug delivery systems. They are classified as United States Food and Drug Administration Generally-Recognized-As-Safe chemical substances and have been extensively utilized within the biomedical and pharmaceutical industries for over half a century. They have so far demonstrated the potential to modulate and improve the physiological performance of bioactives leading to the desired enhanced prophylactic and therapeutic outcomes. This review therefore presents a scholarly survey of inter-disciplinary developments focused on the functionalities of ethylcellulose polymers as biomaterials useful for the design of smart delivery architectures for relevant pharmacotherapeutic biomedical applications. Emphasis was placed on evaluating scientific resources related to recent advancements and future directions associated with its applications as delivery systems for drugs and biologics within the past decade thus complementing other specialized reviews showcasing the theme.
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Affiliation(s)
- Oluwatoyin A. Adeleke
- Address: Immunobiology Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institute of Health, US Department of Health and Human Services, Bethesda, MD 20892, USA.
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28
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Theismann EM, K Keppler J, Owen M, Schwarz K, Schlindwein W. Modelling the Effect of Process Parameters on the Wet Extrusion and Spheronisation of High-Loaded Nicotinamide Pellets Using a Quality by Design Approach. Pharmaceutics 2019; 11:E154. [PMID: 30939803 PMCID: PMC6523633 DOI: 10.3390/pharmaceutics11040154] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 03/23/2019] [Accepted: 03/25/2019] [Indexed: 12/17/2022] Open
Abstract
The aim of the present study was to develop an alternative process to spray granulation in order to prepare high loaded spherical nicotinamide (NAM) pellets by wet extrusion and spheronisation. Therefore, a quality by design approach was implemented to model the effect of the process parameters of the extrusion-spheronisation process on the roundness, roughness and useable yield of the obtained pellets. The obtained results were compared to spray granulated NAM particles regarding their characteristics and their release profile in vitro after the application of an ileocolon targeted shellac coating. The wet extrusion-spheronisation process was able to form highly loaded NAM pellets (80%) with a spherical shape and a high useable yield of about 90%. However, the water content range was rather narrow between 24.7% and 21.3%. The design of experiments (DoE), showed that the spheronisation conditions speed, time and load had a greater impact on the quality attributes of the pellets than the extrusion conditions screw design, screw speed and solid feed rate (hopper speed). The best results were obtained using a low load (15 g) combined with a high rotation speed (900 m/min) and a low time (3⁻3.5 min). In comparison to spray granulated NAM pellets, the extruded NAM pellets resulted in a higher roughness and a higher useable yield (63% vs. 92%). Finally, the coating and dissolution test showed that the extruded and spheronised pellets are also suitable for a protective coating with an ileocolonic release profile. Due to its lower specific surface area, the required shellac concentration could be reduced while maintaining the release profile.
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Affiliation(s)
- Eva-Maria Theismann
- Division of Food Technology, Kiel University, Heinrich-Hecht-Platz 10, 24118 Kiel, Germany.
| | - Julia K Keppler
- Division of Food Technology, Kiel University, Heinrich-Hecht-Platz 10, 24118 Kiel, Germany.
| | - Martin Owen
- Insight by Design Ltd., Stevenage SG2 8SB, UK.
| | - Karin Schwarz
- Division of Food Technology, Kiel University, Heinrich-Hecht-Platz 10, 24118 Kiel, Germany.
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