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Rayapolu RG, Yadav B, Apte SS, Venuganti VVK. Development of posaconazole nanocrystalline solid dispersion: preparation, characterization and in vivo evaluation. Pharm Dev Technol 2024:1-17. [PMID: 38713634 DOI: 10.1080/10837450.2024.2353314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Accepted: 05/06/2024] [Indexed: 05/09/2024]
Abstract
OBJECTIVE Posaconazole (PCZ) is an antifungal drug, which acts by inhibiting the lanosterol-14α-demethylase enzyme. It is a biopharmaceutical classification system class II drug with its bioavailability being limited by poor aqueous solubility. The aim of this study was to improve the oral bioavailability of PCZ by preparing nanocrystalline solid dispersion (NCS). METHODS PCZ-NCS was prepared by a combination of precipitation and high-pressure homogenization followed by freeze-drying. Several different surfactants and polymers were screened to produce NCS with smaller particle size and higher stability. RESULTS The optimized NCS formulation containing 0.2% Eudragit S100 and 0.2% SLS was found to provide the average particle size of 73.31 ± 4.7 nm with a polydispersity index of 0.23 ± 0.03. Scanning electron microscopy revealed the preparation of homogeneous and rounded particles. Differential scanning calorimetry and X-ray diffraction confirmed crystalline nature of NCS. Nanonization increased the saturation solubility of PCZ by about 18-fold in comparison with the neat drug. Intrinsic dissolution study showed 93% dissolution of PCZ within the first 10 min. In vivo pharmacokinetic study in Wistar rats showed that Cmax and AUC total of PCZ-NCS increased by 2.58 and 2.64-fold compared to the marketed formulation. CONCLUSION PCZ-NCS formulation presents a viable approach for enhancing the oral bioavailability of PCZ.
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Affiliation(s)
- Ranga Goud Rayapolu
- Birla Institute of Technology and Science (BITS) Pilani, Hyderabad Campus, Shameerpet, Hyderabad 500078, Telangana, India
- Natco Research Center, Natco Pharma Limited, Sanath Nagar, Hyderabad, Telangana, India
| | - Balvant Yadav
- Natco Research Center, Natco Pharma Limited, Sanath Nagar, Hyderabad, Telangana, India
| | - Shashank S Apte
- Natco Research Center, Natco Pharma Limited, Sanath Nagar, Hyderabad, Telangana, India
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De Leo V, Maurelli AM, Giotta L, Daniello V, Di Gioia S, Conese M, Ingrosso C, Ciriaco F, Catucci L. Polymer Encapsulated Liposomes for Oral Co-Delivery of Curcumin and Hydroxytyrosol. Int J Mol Sci 2023; 24:ijms24010790. [PMID: 36614233 PMCID: PMC9821336 DOI: 10.3390/ijms24010790] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 12/21/2022] [Accepted: 12/27/2022] [Indexed: 01/05/2023] Open
Abstract
Curcumin (Cur) is a hydrophobic polyphenol from the rhizome of Curcuma spp., while hydroxytyrosol (HT) is a water-soluble polyphenol from Olea europaea. Both show outstanding antioxidant properties but suffer from scarce bioavailability and low stability in biological fluids. In this work, the co-encapsulation of Cur and HT into liposomes was realized, and the liposomal formulation was improved using polymers to increase their survival in the gastrointestinal tract. Liposomes with different compositions were formulated: Type 1, composed of phospholipids and cholesterol; Type 2, also with a PEG coating; and Type 3 providing an additional shell of Eudragit® S100, a gastro-resistant polymer. Samples were characterized in terms of size, morphology, ζ-potential, encapsulation efficiency, and loading capacity. All samples were subjected to a simulated in vitro digestion and their stability was investigated. The Eudragit®S100 coating demonstrated prevention of early releases of HT in the mouth and gastric phases, while the PEG shell reduced bile salts and pancreatin effects during the intestinal digestion. In vitro antioxidant activity showed a cumulative effect for Cur and HT loaded in vesicles. Finally, liposomes with HT concentrations up to 40 μM and Cur up to 4.7 μM, alone or in combination, did not show cytotoxicity against Caco-2 cells.
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Affiliation(s)
- Vincenzo De Leo
- Department of Chemistry, University of Bari Aldo Moro, Via Orabona 4, 70126 Bari, Italy
- Correspondence: (V.D.L.); (L.C.)
| | - Anna Maria Maurelli
- Department of Chemistry, University of Bari Aldo Moro, Via Orabona 4, 70126 Bari, Italy
| | - Livia Giotta
- Department of Biological and Environmental Sciences and Technologies, University of Salento, S.P. Lecce-Monteroni, 73100 Lecce, Italy
| | - Valeria Daniello
- Department of Medical and Surgical Sciences, University of Foggia, Viale L. Pinto 1, 71122 Foggia, Italy
| | - Sante Di Gioia
- Department of Medical and Surgical Sciences, University of Foggia, Viale L. Pinto 1, 71122 Foggia, Italy
| | - Massimo Conese
- Department of Medical and Surgical Sciences, University of Foggia, Viale L. Pinto 1, 71122 Foggia, Italy
| | - Chiara Ingrosso
- CNR-IPCF S.S. Bari, c/o Department of Chemistry, University of Bari Aldo Moro, Via Orabona 4, 70126 Bari, Italy
| | - Fulvio Ciriaco
- Department of Chemistry, University of Bari Aldo Moro, Via Orabona 4, 70126 Bari, Italy
| | - Lucia Catucci
- Department of Chemistry, University of Bari Aldo Moro, Via Orabona 4, 70126 Bari, Italy
- Correspondence: (V.D.L.); (L.C.)
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Abstract
Ulcerative colitis (UC) is a chronic disease, which can result the inflammation of the rectum, mucosa of the colon, and submucosa. The active component such as polypeptide in Periplaneta americana, which is one of the most common insects in the nature, can be extracted to treat UC. However, the active components in Periplaneta americana extract (PAE) can be degraded in the stomach due to its extreme acidic environment and enzyme. In this study, we developed a pH-dependent drug delivery method using polymer cellulose acetate (Eudragit S100) as a carrier to deliver high concentration PAE to inflamed colon. Both in vitro and in vivo results showed the PAE-Eudragit-S100 could treat UC through delivering active drug components to colon without degradation.
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Affiliation(s)
- Meng Li
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Liao Ning, China
| | - Hao Wu
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Liao Ning, China
| | - Shuang Wang
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Liao Ning, China
| | - Shengshun Wu
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Liao Ning, China
| | - Jing Han
- School of Functional Food and Wine, Shenyang Pharmaceutical University, Liao Ning, China
| | - Yang Han
- School of Traditional Chinese Medicine, Shenyang Pharmaceutical University, Liao Ning, China
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Maghsoodi M, Astemal SM, Nokhodchi A, Kiaie H, Khoshfetrat AB, Talebi F. An Insight into Eudragit S100 Preserving Mechanism of Cinnarizine Supersaturation. AAPS PharmSciTech 2022; 23:80. [PMID: 35233687 DOI: 10.1208/s12249-022-02223-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Accepted: 01/17/2022] [Indexed: 11/30/2022] Open
Abstract
Generally, supersaturation of weakly basic drug solution in the gastrointestinal tract can be followed by precipitation, and this can compromise the bioavailability of drugs. The purpose of this study was to evaluate the effect of Eudragit® S100 on the pH-induced supersaturation of cinnarizine and to examine the preserving mechanism of cinnarizine supersaturation by Eudragit®. Variables, including pH of media, ionic strength, and degree of supersaturation, were studied to investigate the effects of these parameters on cinnarizine supersaturation in the presence and absence of Eudragit®. The size of the Eudragit® aggregate in solution using dynamic light scattering was determined. The effect of Eudragit® on the transport of cinnarizine through the Caco-2 membrane was also investigated. The particle size study of Eudragit® aggregates showed that the size of these aggregates become large when the pH was lowered. Supersaturation experiments also demonstrated that Eudragit® preserved higher cinnarizine supersaturation with increasing ionic strength of the solution. The phase separation behavior of cinnarizine solution as a function of the degree of the supersaturation could be readily explained by considering the drug amorphous solubility. In vitro permeation studies revealed that the rate of cinnarizine permeation across Caco-2 cells increased in the presence of Eudragit®. According to the obtained results, the aggregation status of Eudragit® and nonspecific hydrophobic cinnarizine-Eudragit® interactions seemed to be essential in determining the effect of Eudragit® on cinnarizine supersaturation.
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Wang G, Yang Y, Yi D, Yuan L, Yin PH, Ke X, Jun-Jie W, Tao MF. Eudragit S100 prepared pH-responsive liposomes-loaded betulinic acid against colorectal cancer in vitro and in vivo. J Liposome Res 2021; 32:250-264. [PMID: 34895013 DOI: 10.1080/08982104.2021.1999974] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
This study aimed to develop polymer Eudragit S100 for preparing pH-responsive liposomes-loaded betulinic acid (pH-BA-LP) to improve the therapeutic index of chemotherapy for colorectal cancer. BA-loaded liposomes were coated with Eudragit S100 by a thin film dispersion and easily scalable pH-driven method. The prepared liposomes were evaluated for size, surface morphology, entrapment efficiency, stability, in vitro drug release, and antitumor activity. In particular, pH-BA-LP showed advantages such as lower size (<100 nm), encapsulation efficiency of 90%, high stability, and stably cumulative release. By detecting the antitumor effects of pH-BA-LP in vivo, it showed that the tumor proliferation and cell migration were significantly inhibited in colorectal cancer. The pH-BA-LP also inhibited tumor growth via the regulation of Akt/TLR-mediated signalling and significantly down-regulated the expression of NFAT1 and NFAT4 proteins. It was found that pH-BA-LP can increase NK cells and CD3+ cells in tumor tissues, and the proportion of CD8+ cells in CD3+ cells was also increased, which proved that pH-BA-LP can play an antitumor effect by enhancing the autoimmunity level in tumor-bearing mice. The positive infiltration rates of CD8 and CD68 were increased and CD163 was relatively decreased by using pH-BA-LP, which proved that pH-BA-LP can regulate the immune infiltration levels in tumor-bearing mice. Therefore, the present work provides an effective method to prepare pH-responsive polymer-coated liposomes for colonic delivery with biologically active compounds.
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Affiliation(s)
- Gang Wang
- Department of Pharmaceutics, Shanghai Eighth People's Hospital, Jiangsu University, Shanghai, China
| | - Yu Yang
- Jiangsu University School of Pharmacy, Zhenjiang City, China
| | - Du Yi
- Department of Pharmaceutics, Shanghai Eighth People's Hospital, Jiangsu University, Shanghai, China
| | - Lu Yuan
- Department of Pharmaceutics, Shanghai Eighth People's Hospital, Jiangsu University, Shanghai, China
| | - Pei-Hao Yin
- Interventional Cancer Institute of Chinese Integrative Medicine, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xu Ke
- Interventional Cancer Institute of Chinese Integrative Medicine, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Wang Jun-Jie
- Department of Pharmaceutics, Shanghai Eighth People's Hospital, Jiangsu University, Shanghai, China
| | - Min-Fang Tao
- Department of Pharmaceutics, Shanghai Eighth People's Hospital, Jiangsu University, Shanghai, China
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Borderwala K, Rathod S, Yadav S, Vyas B, Shah P. Eudragit S-100 Surface Engineered Nanostructured Lipid Carriers for Colon Targeting of 5-Fluorouracil: Optimization and In Vitro and In Vivo Characterization. AAPS PharmSciTech 2021; 22:216. [PMID: 34386888 DOI: 10.1208/s12249-021-02099-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 07/19/2021] [Indexed: 01/04/2023] Open
Abstract
5-Fluorouracil (5-FU) is the most preferred chemotherapeutic agent in the management of colon cancer but is associated with poor therapeutic efficacy and lack of site specificity. Hence, it was aimed to employ Eudragit S100 surface engineered 5-FU nanostructured lipid carriers for the spatial and temporal release of the drug for the treatment of colon cancer. Hot high-pressure homogenization (HPH) technique was employed in the preparation of 5-FU-NLCs. The optimization of 5-FU-NLCs was performed using a Quality by Design (QbD) approach. A 32 factorial design was employed wherein the relationship between independent variables [amount of oleic acid (X1) and concentration of Tween®80 (X2)] and dependent variables [particle size (Y1) and % entrapment efficiency (Y2)] was studied. Optimized 5-FU-NLCs were surface treated to obtain Eudragit S100-coated 5-FU-NLCs (EU-5-FU-NLCs). The evaluation parameters for 5-FU-NLCs and EU-5-FU-NLCs included surface morphology, particle size, PDI, and zeta potential. In vitro release from EU-5-FU-NLCs revealed a selective and controlled 5-FU release in the colonic region for 24 h. In vitro cytotoxicity (MTT assay) was performed against Caco-2 cancer cells, wherein EU-5-FU-NLCs exhibited a 2-fold greater cytotoxic potential in comparison to a 5-FU solution (5-FU-DS). Oral administration of EU-5-FU-NLCs in Albino Wistar rats depicted a higher Cmax (2.54 folds) and AUC (11 folds) as well as prolonged Tmax (16 folds) and MRT (4.32 folds) compared to 5-FU-DS confirming higher bioavailability along with the spatial and temporal release in the colonic region. Thus, a multifaceted strategy involving abridgement of nanotechnology along with surface engineering is introduced for effective chemotherapy of colon cancer via oral administration of 5-FU with uncompromised safety and higher efficacy.Graphical abstract.
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Kanwal U, Mukhtar S, Waheed M, Mehreen A, Abbas N, Shamim R, Hussain K, Rasool F, Hussain A, Bukhari NI. Fixed Dose Single Tablet Formulation with Differential Release of Amlodipine Besylate and Simvastatin and Its Pharmacokinetic Profile: QbD and Risk Assessment Approach. Drug Des Devel Ther 2021; 15:2193-2210. [PMID: 34079222 PMCID: PMC8164448 DOI: 10.2147/dddt.s240506] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 03/12/2021] [Indexed: 01/13/2023] Open
Abstract
Purpose A differential release fixed dose matrix tablet of amlodipine besylate (AML-B) and simvastatin (SIM) was formulated to enhance patient compliance. Material and Method In the first phase, release controlling parameters of AML-B and SIM granules were identified and in the second phase a fixed dose AML-B and SIM tablet formulation was prepared and optimized for a differential release of the drugs using a quality by design (QbD) and risk assessment approach. A validated HPLC method was employed for simultaneous determination of AML-B and SIM for FDC formulation. A pharmacokinetics of the above drugs was studied in healthy dogs in the third phase. Results In QbD-based optimized formulation, Eudragit® RSPO-dicalcium phosphate (DCP) blend controlled the release of AML-B over 8 h, though this diffusion-controlled release assumed first order kinetics. DCP and Eudragit® RS 100 also retarded release of SIM causing SIM release over 8 h after AML-B release from the optimized FDC tablet formulation. The HPLC retention times of AML-B and SIM were 2.10 and 15.52 min, respectively. Linearity for AML-B was 5.0–50 ng/mL and 0.01–2.0 µg/mL for SIM with percent recoveries of 92.85–101.53% and 94.51–117.75% for AML-B and SIM. AUC0-∞ of AML-B was increased 3 fold, while AUC0-∞ of SIM was decreased 2 fold. The tmax values for AML-B and SIM were 12 and 6 h, respectively. AML-B was absorbed without any lag time (tlag) while tlag was 6.33 ± 0.81 h for SIM, thus met the study objective. Conclusion The pharmacokinetic study showed an immediate absorption of AML-B while that of SIM was withheld for 6 h, close to the desired delay time of 8 h.
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Affiliation(s)
- Ummarah Kanwal
- Punjab University College of Pharmacy, University of the Punjab, Lahore, Pakistan
| | - Shahid Mukhtar
- Punjab University College of Pharmacy, University of the Punjab, Lahore, Pakistan
| | | | | | - Nasir Abbas
- Punjab University College of Pharmacy, University of the Punjab, Lahore, Pakistan
| | - Rahat Shamim
- Punjab University College of Pharmacy, University of the Punjab, Lahore, Pakistan
| | - Khalid Hussain
- Punjab University College of Pharmacy, University of the Punjab, Lahore, Pakistan
| | - Fatima Rasool
- Punjab University College of Pharmacy, University of the Punjab, Lahore, Pakistan
| | - Amjad Hussain
- Punjab University College of Pharmacy, University of the Punjab, Lahore, Pakistan
| | - Nadeem Irfan Bukhari
- Punjab University College of Pharmacy, University of the Punjab, Lahore, Pakistan
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López-Muñoz R, Treviño ME, Castellanos F, Morales G, Rodríguez-Fernández O, Saavedra S, Licea-Claverie A, Saade H, Enríquez-Medrano FJ, López RG. Loading of doxorubicin on poly(methyl methacrylate-co-methacrylic acid) nanoparticles and release study. J Biomater Sci Polym Ed 2021; 32:1107-1124. [PMID: 33691605 DOI: 10.1080/09205063.2021.1900652] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Nanoparticles (NP) of 12.7 nm in diameter of the poly(methyl methacrylate (MMA)-co-methacrylic acid (MAA)) copolymer were prepared. 13C-NMR results showed a MMA:MAA molar ratio of 0.64:0.36 in the copolymer, which is similar to the poly(MMA-co-MAA) commercially known as the FDA approved Eudragit S100 (0.67:0.33). The NP prepared in this study were loaded at pH 5 with varying amounts (from 0.54 to 6.91%) of doxorubicin (DOX), an antineoplastic drug. 1H-NMR results indicated the electrostatic interactions between the ionized carboxylic groups of the MAA units in the copolymer and the proton of the glycosidic amine in DOX. Measurements by QLS and TEM indicated that the loading destabilizes the NP, and that for increase stability, they aggregate in a reversible way, forming aggregates with a diameter up to 99.5 nm at a DOX load of 6.91%. The analysis of drug release data at pH 7.4 showed that loaded NP with at least 4.38% DOX release the drug very slowly and follows the Higuchi model; the former suggests that they could remain for long periods in the bloodstream to reach and destroy cancer cells.
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Affiliation(s)
| | | | | | - Graciela Morales
- Centro de Investigación en Química Aplicada, Saltillo, CH, México
| | | | - Santiago Saavedra
- Facultad de Ciencias Biológicas, Laboratorio de Inmunología y Virología, Universidad Autónoma de Nuevo León, Nuevo León, México
| | - Angel Licea-Claverie
- Centro de Graduados e Investigación en Química, Tecnológico Nacional de México/Instituto Tecnológico de Tijuana, Tijuana, BC, Mexico
| | - Hened Saade
- Centro de Investigación en Química Aplicada, Saltillo, CH, México
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Alper Öztürk A, Namlı İ, Aygül A. Cefaclor Monohydrate-Loaded Colon-Targeted Nanoparticles for Use in COVID-19 Dependent Coinfections and Intestinal Symptoms: Formulation, Characterization, Release Kinetics, and Antimicrobial Activity. Assay Drug Dev Technol 2021; 19:156-175. [PMID: 33728979 DOI: 10.1089/adt.2020.1014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Corona virus disease-2019 (COVID-19) emerged in Wuhan, China in December 2019 and was declared as a pandemic by the World Health Organization in March 2020. Although there is no complete treatment protocol for COVID-19, studies on this topic are ongoing, and it is known that broad-spectrum antibiotics such as cephalosporins are used for coinfections and symptoms in COVID-19 patients. Studies have shown that Staphylococcus aureus and Escherichia coli bacteria can cause symptoms such as diarrhea and coinfections accompanying COVID-19. Therefore, in this study, colon-targeted cefaclor monohydrate (CEF)-loaded poly(lactic-co-glycolic acid) (PLGA)-Eudragit S100 nanoparticles (NPs) were prepared using a nanoprecipitation technique. The particle sizes of the CEF-loaded NPs were between 171.4 and 198.8 nm. The encapsulation efficiency was in the range of 58.4%-81.2%. With dissolution studies, it has been concluded that formulations prepared with Eudragit S100 (E-coded) and Eudragit S100+PLGA (EP-coded) are pH-sensitive formulations and they are targetable to the colon, whereas the formulation prepared only with PLGA (P-coded) can release a higher CEF rate in the colon owing to the slow release properties of PLGA. The release kinetics were fitted to the Korsmeyer-Peppas and Weibull models. The antibacterial activity of E-, EP-, and P-coded formulations was 16-fold, 16-fold, and 2-fold higher than CEF, respectively, for S. aureus and E. coli according to the microdilution results. As a result of the time killing experiment, all formulations prepared were found to be more effective than the antibiotic itself for long periods. Consequently, all formulations prepared in this study hope to guide researchers/clinicians in treating both gram-positive and gram-negative bacteria-induced infections, as well as COVID-19 associated coinfections and symptoms.
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Affiliation(s)
- A Alper Öztürk
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Anadolu University, Eskişehir, Turkey
| | - İrem Namlı
- Department of Pharmaceutical Technology, Graduate School of Health Sciences, Anadolu University, Eskişehir, Turkey
| | - Abdurrahman Aygül
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Çukurova University, Adana, Turkey
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Rajpoot K, Jain SK. 99mTc-labelled and pH-awakened microbeads entrapping surface-modified lipid nanoparticles for the augmented effect of oxaliplatin in the therapy of colorectal cancer. J Microencapsul 2020; 37:609-623. [PMID: 32985297 DOI: 10.1080/02652048.2020.1829141] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
AIM This study was aimed to develop Eudragit S100-coated, pH-awakened microbeads (MBs) encapsulating folic acid (FA)-modified tristearin solid lipid nanoparticles (SLNs) loaded with oxaliplatin (OP). Afterward, these formulations were evaluated (in vitro and in vivo) for their potential against colorectal cancer (CRC). METHODS The SLNs were synthesised by employing the solvent diffusion technique and then they were entrapped in the MBs. The prepared uncoupled and coupled SLNs (SLN-OP and FA-SLN-OP, respectively) were examined for in vitro cytotoxicity effect against COLO-205. Gamma-scintigraphy study was used for determining biodistribution (in vivo) of drug in different organs through MBs. RESULTS Outcomes for FA-SLN-OP revealed more cytotoxicity (50% inhibitory concentration [IC50] = 6.8 µg/ml) against COLO-205 cells (in vitro) than OP solution (IC50 = 8.0 µg/ml) and SLN-OP (IC50= 7.5 µg/ml). MBs were also investigated in vivo using Gamma-scintigraphy study. After 48 h study, 99mTc-EuB-FA-SLN-OP confirmed an elevated level of drug in the colonic tumour, which was found significantly (p< 0.0001) higher than that of 99mTc-EuB-SLN-OP. CONCLUSIONS In conclusion, developed MBs formulation (99mTc-EuB-FA-SLN-OP) suggested promising results against therapy of CRC using dual targeting (i.e. ligand-directed and pH-awakened) approach.
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Affiliation(s)
- Kuldeep Rajpoot
- Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur, India
| | - Sunil K Jain
- Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur, India
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Sreeharsha N, Rajpoot K, Tekade M, Kalyane D, Nair AB, Venugopala KN, Tekade RK. Development of Metronidazole Loaded Chitosan Nanoparticles Using QbD Approach-A Novel and Potential Antibacterial Formulation. Pharmaceutics 2020; 12:E920. [PMID: 32992903 DOI: 10.3390/pharmaceutics12100920] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 09/19/2020] [Accepted: 09/21/2020] [Indexed: 12/17/2022] Open
Abstract
The aim of this study was to design, optimize, and develop metronidazole (Met) loaded nanoparticles (MetNp) by employing quality-based design (QbD) as well as a risk assessment methodology. A fractional factorial design was used by selecting five independent variables viz., chitosan concentration, tripolyphosphate concentration, and acetic acid concentration as material attributes, stirring speed, and stirring time as process parameters, whereby their influence on two dependent variables such as particle size (PS) and %entrapment efficiency (%EE) was studied. MetNp were synthesized by employing an ionic-gelation technique and optimized formula obtained from the QbD design study. PS and %EE studies revealed the formation of MetNp with 558.06 ± 2.52 nm and 59.07 ± 2.15%, respectively. Furthermore, a Met release study in various simulated gastro-intestinal media suggested pH-triggered (pH > 7.0) and sustained release profile of Met from Eudragit S100 enteric-coated MetNp capsule (MetNp cap). Moreover, the stability investigation of formulations confirmed good stability with respect to their PS and residual drug content (RDC) at different temperature conditions. In conclusion, the QbD method was effectively utilized in the development of MetNp and enteric-coated MetNp cap depicting their potential to release Met through MetNp cap only in the colon region and can be utilized for the treatment of amoebiasis in the colon.
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Pourjafar H, Noori N, Gandomi H, Basti AA, Ansari F. Viability of microencapsulated and non-microencapsulated Lactobacilli in a commercial beverage. ACTA ACUST UNITED AC 2020; 25:e00432. [PMID: 32099822 PMCID: PMC7030990 DOI: 10.1016/j.btre.2020.e00432] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 01/19/2020] [Accepted: 02/05/2020] [Indexed: 12/29/2022]
Abstract
Ca-alginate-chitosan and eudragit S100 nanoparticles were used for encapsulation. The encapsulation increased the viability of probiotics into Iranian Doogh beverage. The encapsulation increased the viability of probiotics under GI conditions.
The survival rate of free and encapsulated L. acidophilus and L. rhamnosus into Doogh beverage and simulated gastrointestinal conditions during 42-day were studied. Microencapsulation considerably protected both L. acidophilus and L. rhamnosus in Doogh beverage storage and in gastrointestinal conditions. Microencapsulation provided better protection to L. acidophilus than to L. rhamnosus during Doogh storage. In beverages containing the free form of bacteria, pH and acidity changes were greater than those of microencapsulated and control groups. More activity of the free probiotic bacteria (during a 42-day period especially after 21-day) produced more acid and metabolites inside the product, thereby reducing the organoleptic properties scores, However, acidity, pH and organoleptic characteristics of Doogh containing microencapsulated bacteria did not change considerably. In conclusion, this study suggests that the encapsulation and double coating of L. acidophilus and L. rhamnosus can increase the viability of them in Doogh beverage and in simulated GI conditions.
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Affiliation(s)
- Hadi Pourjafar
- Department of Food Sciences, Maragheh University of Medical Sciences, Maragheh, Iran
| | - Negin Noori
- Department of Food Hygiene, Faculty of Veterinary Medicine, University of Tehran, Iran
| | - Hasan Gandomi
- Department of Food Hygiene, Faculty of Veterinary Medicine, University of Tehran, Iran
| | | | - Fereshteh Ansari
- Research Center for Evidence-Based Medicine, Health Management and Safety Promotion Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran.,Iranian EBM Centre: A Joanna Briggs Institute Affiliated Group, Iran.,Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Tehran. Iran
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Vinner GK, Richards K, Leppanen M, Sagona AP, Malik DJ. Microencapsulation of Enteric Bacteriophages in a pH-Responsive Solid Oral Dosage Formulation Using a Scalable Membrane Emulsification Process. Pharmaceutics 2019; 11:E475. [PMID: 31540028 PMCID: PMC6781335 DOI: 10.3390/pharmaceutics11090475] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 09/07/2019] [Accepted: 09/10/2019] [Indexed: 02/03/2023] Open
Abstract
A scalable low-shear membrane emulsification process was used to produce microencapsulated Escherichia coli-phages in a solid oral dosage form. Uniform pH-responsive composite microparticles (mean size ~100 µm) composed of Eudragit® S100 and alginate were produced. The internal microstructure of the gelled microcapsules was studied using ion-milling and imaging, which showed that the microparticles had a solid internal core. The microencapsulation process significantly protected phages upon prolonged exposure to a simulated gastric acidic environment. Encapsulated phages that had been pre-exposed to simulated gastric acid were added to actively growing bacterial cells using in vitro cell cultures and were found to be effective in killing E. coli. Encapsulated phages were also shown to be effective in killing actively growing E. coli in the presence of human epithelial cells. Confocal microscopy images showed that the morphology of encapsulated phage-treated epithelial cells was considerably better than controls without phage treatment. The encapsulated phages were stable during refrigerated storage over a four-week period. The process of membrane emulsification is highly scalable and is a promising route to produce industrial quantities of pH-responsive oral solid dosage forms suitable for delivering high titres of viable phages to the gastrointestinal tract.
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Affiliation(s)
- Gurinder K Vinner
- Chemical Engineering Department, Loughborough University, Loughborough, LE11 3TU, UK.
| | - Kerry Richards
- Chemical Engineering Department, Loughborough University, Loughborough, LE11 3TU, UK.
| | - Miika Leppanen
- Department of Physics, Department of Biological and Environmental Science, Nanoscience Center, University of Jyväskylä, Jyväskylä, FI-40014, Finland.
| | - Antonia P Sagona
- School of Life Sciences and Warwick Integrative Synthetic Biology Centre, University of Warwick, Coventry, CV4 7AL, UK.
| | - Danish J Malik
- Chemical Engineering Department, Loughborough University, Loughborough, LE11 3TU, UK.
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Qindeel M, Ahmed N, Sabir F, Khan S, Ur-Rehman A. Development of novel pH-sensitive nanoparticles loaded hydrogel for transdermal drug delivery. Drug Dev Ind Pharm 2019; 45:629-641. [PMID: 30633578 DOI: 10.1080/03639045.2019.1569031] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
OBJECTIVE Difference of pH that exists between the skin surface and blood circulation can be exploited for transdermal delivery of drug molecules by loading drug into pH-sensitive polymer. Eudragit S100 (ES100), a pH-sensitive polymer having dissolution profile above pH 7.4, is used in oral, ocular, vaginal and topical delivery of drug molecules. However, pH-sensitive potential of this polymer has not been explored for transdermal delivery. The aim of this research work was to exploit the pH-sensitive potential of ES100 as a nanocarrier for transdermal delivery of model drug, that is, Piroxicam. METHODS Simple nanoprecipitation technique was employed to prepare the nanoparticles and response surface quadratic model was applied to get an optimized formulation. The prepared nanoparticles were characterized and loaded into Carbopol 934 based hydrogel. In vitro release, ex vivo permeation and accelerated stability studies were carried out on the prepared formulation. RESULTS Particles with an average size of 25-40 nm were obtained with an encapsulation efficiency of 88%. Release studies revealed that nanoparticles remained stable at acidic pH while sustained release with no initial burst effect was observed at pH 7.4 from the hydrogel. Permeation of these nanocarriers from hydrogel matrix showed significant permeation of Piroxicam through mice skin. CONCLUSION It can be concluded that ES100 based pH-sensitive nanoparticles have potential to be delivered through transdermal route.
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Affiliation(s)
- Maimoona Qindeel
- a Department of Pharmacy , Quaid.i.Azam University , Islamabad , Pakistan
| | - Naveed Ahmed
- a Department of Pharmacy , Quaid.i.Azam University , Islamabad , Pakistan
| | - Fakhara Sabir
- a Department of Pharmacy , Quaid.i.Azam University , Islamabad , Pakistan
| | - Samiullah Khan
- b Department of Microbiology , Quaid.i.Azam University , Islamabad , Pakistan
| | - Asim Ur-Rehman
- a Department of Pharmacy , Quaid.i.Azam University , Islamabad , Pakistan
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Li LP, Wang XJ, Zhang JY, Zhang LL, Cao YB, Gu LQ, Yu YQ, Yang QL, Shen CY, Han B, Jiang YY. Antifungal activity of osthol in vitro and enhancement in vivo through Eudragit S100 nanocarriers. Virulence 2018; 9:555-562. [PMID: 28795862 PMCID: PMC5955437 DOI: 10.1080/21505594.2017.1356503] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
In vitro interaction of osthol (Ost) and fluconazole (FLC) was investigated against 11 fluconazole-resistant clinical isolates of Candida albicans. Synergistic activities were determined using the checkerboard microdilution assay. The results of agar diffusion test confirmed the synergistic interaction. We used an enteric material Eudragit S100 for preparation of Ost nanoparticle (Ost-NP) to improve the oral bioavailability, biological activity of Ost. The physicochemical characteristics of Ost-S100-NP revealed Ost-S100-NP with mean particle size of 55.4±0.4 nm, encapsulation efficiency of 98.95±0.06%, drug loading efficiency of 23.89±0.25%, yield of 98.5±0.1% and a polydispersity index (PDI) of 0.165. As the Ost concentration-time curve showed, Ost-S100-NP can increase the plasma concentration and relative bioavailability of Ost compared with Ost-suspension by oral administration. In vivo, Ost-S100-NP enhanced the therapeutic efficacy of Ost against FLC-resistant C. albicans in immunosuppressed candidiasis mice model. The available information strongly suggests that Ost-S100-NP may be used as a promising compound against drug-resistant fungi.
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Affiliation(s)
- Lin-Peng Li
- a Center for New Drug Research , School of Pharmacy, Second Military Medical University , Shanghai , P.R. China
| | - Xiao-Juan Wang
- b Department of Pharmacy , Minhang District Central Hospital , Shanghai , P.R. China
| | - Jin-Yu Zhang
- a Center for New Drug Research , School of Pharmacy, Second Military Medical University , Shanghai , P.R. China
| | - Lu-Lu Zhang
- a Center for New Drug Research , School of Pharmacy, Second Military Medical University , Shanghai , P.R. China
| | - Yong-Bing Cao
- a Center for New Drug Research , School of Pharmacy, Second Military Medical University , Shanghai , P.R. China
| | - Li-Qun Gu
- b Department of Pharmacy , Minhang District Central Hospital , Shanghai , P.R. China
| | - Yi-Qun Yu
- b Department of Pharmacy , Minhang District Central Hospital , Shanghai , P.R. China
| | - Qi-Lian Yang
- b Department of Pharmacy , Minhang District Central Hospital , Shanghai , P.R. China
| | - Chun-Ying Shen
- b Department of Pharmacy , Minhang District Central Hospital , Shanghai , P.R. China
| | - Bing Han
- b Department of Pharmacy , Minhang District Central Hospital , Shanghai , P.R. China
| | - Yuan-Ying Jiang
- a Center for New Drug Research , School of Pharmacy, Second Military Medical University , Shanghai , P.R. China
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Zhang G, Zhang J. Enhanced oral bioavailability of EGCG using pH-sensitive polymeric nanoparticles: characterization and in vivo investigation on nephrotic syndrome rats. Drug Des Devel Ther 2018; 12:2509-2518. [PMID: 30147298 PMCID: PMC6097509 DOI: 10.2147/dddt.s172919] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Objective Chronic kidney disease (CKD) is characterized by progressive loss of renal functions. At present, there are only limited therapeutic strategies to slow down the progress of CKD and there is an urgent need to develop new therapeutic strategies to treat CKD patients. Numerous research evidence supports the potential role of EGCG in the renal protection of CKD. However, the clinical use is still limited due to the poor oral bioavailability. The aim of this study was to develop pH-sensitive polymeric nanoparticles of EGCG to improve this deficiency. Materials and methods EGCG-loaded nanoparticles (EGCG NPs) were prepared by an improved emulsion evaporation method. The formulation prepared was in spherical with uniform sizes, high encapsulation efficiencies and drug loading. The therapeutic efficacy of EGCG NPs on chronic kidney disease was investigated on model of rat Nephrotic syndrome by measuring urinary protein excretion and kidney pathology score. Results The mean particle size was found to be 91.3±0.8 nm and the encapsulation efficiency% and drug loading% of the formulation were 80.8%±1.6% and 6.3%±1.4%, respectively. The powder X-ray diffraction and differential scanning calorimetry of EGCG NPs showed that EGCG existed in amorphous form in NPs. The release of EGCG from NPs exhibited the lower burst release at pH 1.2 (<10%) and with the increase of pH value, the release of EGCG also gradually increased. During the observation period (24 hours), the total release amount was almost 68%. EGCG NPs could significantly modify the pharmacokinetic profile and increase the bioavailability of EGCG by more than 2.4-fold in comparison with the EGCG powder group. At the end of the fourth and sixth week, proteinuria excretion of nephrotic syndrome rats treated with EGCG NPs was significantly lower than those treated with EGCG powder, and kidney pathology scores in EGCG NPs treated rats were also significantly lower than EGCG powder treated rats. Conclusion The results of pharmacodynamics showed that compared with EGCG powder treatment group, EGCG NPs treatment group had better efficacy and reduce kidney damage.
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Affiliation(s)
- Guojuan Zhang
- Department of Nephrology, Beijing Tongren Hospital, Capital Medical University, Beijing, People's Republic of China,
| | - Jianfang Zhang
- Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai, People's Republic of China
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Zhao M, Lee SH, Song JG, Kim HY, Han HK. Enhanced oral absorption of sorafenib via the layer-by-layer deposition of a pH-sensitive polymer and glycol chitosan on the liposome. Int J Pharm 2018; 544:14-20. [PMID: 29655795 DOI: 10.1016/j.ijpharm.2018.04.020] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 03/26/2018] [Accepted: 04/10/2018] [Indexed: 12/19/2022]
Abstract
This study aimed to design the effective formulation of sorafenib (SF) to enhance the oral drug absorption. Three liposomal formulations of SF were prepared including uncoated liposome (SF-Lip), glycol chitosan-coated liposome (GC-SF-Lip), and Eudragit S100-glycol-chitosan coated liposome (SGC-SF-Lip). All formulations showed a narrow size distribution with a high encapsulation efficiency. Both GC-SF-Lip and SGC-SF-Lip exhibited good stability at acidic and neutral pHs without any significant drug leakage, while SF-Lip appeared to be unstable at pH 1.2. In the case of double coated SGC-SF-Lip, its size changed significantly at pH 7.4, due to the dissolution of Eudragit S100 coating layer into the surrounding medium. Compared to SF solution, all liposomal formulations demonstrated a higher cellular uptake in Caco-2 cells. In particular, SGC-SF-Lip displayed a lower cellular uptake than GC-SF-Lip at pH 6.5, but it achieved a similar cellular uptake to GC-SF-Lip at pH 7.4. Consistently, SGC-SF-Lip was less cytotoxic than GC-SF-Lip at pH 6.5, whereas it showed a comparable cytotoxicity to GC-SF-Lip at pH 7.4, implying the removal of the Eudragit S100 coating layer at pH 7.4. After an oral administration to rats, SGC-SF-Lip significantly improved the systemic exposure of SF, where its Cmax and AUC were approximately fourfold higher than the untreated drug. Collectively, SGC-SF-Lip appeared to be promising to enhance the oral absorption of SF.
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Affiliation(s)
- Mengjia Zhao
- College of Pharmacy, Dongguk University-Seoul, Dongguk-ro-32, Ilsan-Donggu, Goyang, Republic of Korea
| | - Sang Hoon Lee
- College of Pharmacy, Dongguk University-Seoul, Dongguk-ro-32, Ilsan-Donggu, Goyang, Republic of Korea
| | - Jae Geun Song
- College of Pharmacy, Dongguk University-Seoul, Dongguk-ro-32, Ilsan-Donggu, Goyang, Republic of Korea
| | - Hyeon Young Kim
- College of Pharmacy, Dongguk University-Seoul, Dongguk-ro-32, Ilsan-Donggu, Goyang, Republic of Korea
| | - Hyo-Kyung Han
- College of Pharmacy, Dongguk University-Seoul, Dongguk-ro-32, Ilsan-Donggu, Goyang, Republic of Korea.
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De Leo V, Milano F, Mancini E, Comparelli R, Giotta L, Nacci A, Longobardi F, Garbetta A, Agostiano A, Catucci L. Encapsulation of Curcumin-Loaded Liposomes for Colonic Drug Delivery in a pH-Responsive Polymer Cluster Using a pH-Driven and Organic Solvent-Free Process. Molecules 2018; 23:E739. [PMID: 29570636 PMCID: PMC6017095 DOI: 10.3390/molecules23040739] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 03/09/2018] [Accepted: 03/21/2018] [Indexed: 01/08/2023] Open
Abstract
The present study aimed to develop and optimize liposome formulation for the colonic delivery of biologically active compounds. A strategy to facilitate such targeting is to formulate liposomes with a polymer coating sensitive to the pH shifts in the gastrointestinal tract. To this end, liposomes encapsulating curcumin-chosen as the biologically active compound model-and coated with the pH-responsive polymer Eudragit S100 were prepared and characterized. Curcumin was encapsulated into small unilamellar vesicles (SUVs) by the micelle-to-vesicle transition method (MVT) in a simple and organic solvent-free way. Curcumin-loaded liposomes were coated with Eudragit S100 by a fast and easily scalable pH-driven method. The prepared liposomes were evaluated for size, surface morphology, entrapment efficiency, stability, in vitro drug release, and curcumin antioxidant activity. In particular, curcumin-loaded liposomes displayed size lower than 100 nm, encapsulation efficiency of 98%, high stability at both 4 °C and 25 °C, high in vitro antioxidant activity, and a cumulative release that was completed within 200 min. A good Eudragit S100 coating which did not alter the properties of the curcumin-loaded liposomes was obtained. The present work therefore provides a fast and solvent-free method to prepare pH-responsive polymer-coated liposomes for the colonic delivery of biologically active compounds.
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Affiliation(s)
- Vincenzo De Leo
- Department of Chemistry, University of Bari, Via Orabona 4, 70126 Bari, Italy.
- CNR-IPCF Institute for Physical and Chemical Processes, Bari unit, Via Orabona 4, 70126 Bari, Italy.
| | - Francesco Milano
- CNR-IPCF Institute for Physical and Chemical Processes, Bari unit, Via Orabona 4, 70126 Bari, Italy.
| | - Erminia Mancini
- Department of Chemistry, University of Bari, Via Orabona 4, 70126 Bari, Italy.
| | - Roberto Comparelli
- CNR-IPCF Institute for Physical and Chemical Processes, Bari unit, Via Orabona 4, 70126 Bari, Italy.
| | - Livia Giotta
- Department of Biological and Environmental Sciences and Technologies, University of Salento, SP Lecce-Monteroni, I-73100 Lecce, Italy.
| | - Angelo Nacci
- Department of Chemistry, University of Bari, Via Orabona 4, 70126 Bari, Italy.
- CNR-ICCOM Institute of chemistry of organometallic compounds, Bari unit, Via E. Orabona, 4, 70126 Bari, Italy.
| | | | - Antonella Garbetta
- CNR-ISPA Institute of Sciences of Food Production, Via G. Amendola 122/O, 70125 Bari, Italy.
| | - Angela Agostiano
- Department of Chemistry, University of Bari, Via Orabona 4, 70126 Bari, Italy.
- CNR-IPCF Institute for Physical and Chemical Processes, Bari unit, Via Orabona 4, 70126 Bari, Italy.
| | - Lucia Catucci
- Department of Chemistry, University of Bari, Via Orabona 4, 70126 Bari, Italy.
- CNR-IPCF Institute for Physical and Chemical Processes, Bari unit, Via Orabona 4, 70126 Bari, Italy.
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Sharma S, Sinha VR. Liquid Nanosize Emulsion-Filled Enteric-Coated Capsules for Colon Delivery of Immunosuppressant Peptide. AAPS PharmSciTech 2018; 19:881-885. [PMID: 29043605 DOI: 10.1208/s12249-017-0886-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 09/19/2017] [Indexed: 11/30/2022] Open
Abstract
Present study aims at solubilizing slightly water-soluble peptide into a nanosize emulsion which is filled into a hard gelatin capsule in the form of preconcentrate. Further, liquid-filled capsule was dip-coated with ethyl cellulose and Eudragit S100 for colon targeting. An in vitro release profile was studied for selected formulations, i.e., Formulation A (5 mg ethyl cellulose and 40 mg Eudragit S100), Formulation B (10 mg ethyl cellulose and 30 mg Eudragit S100), and Formulation C (10 mg ethyl cellulose and 20 mg Eudragit S100). Formulations B and A showed an immediate release after 5 and 6 h, respectively, which represents ileo-ceacal transit time. The nanosize of emulsion, i.e., below 100 nm, was confirmed by transmission electron microscopy. Also, a phase transition of nanosize emulsion from water in oil to oil in water on dilution with water was observed through TEM. This novel approach of filling poorly water-soluble protein in solubilized form of nanosize emulsion preconcentrate into coated hard gelatin capsules for colon targeting has been reported first time. This approach could be a breakthrough for the better management of local intestinal pathologies.
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Chen S, Guo F, Deng T, Zhu S, Liu W, Zhong H, Yu H, Luo R, Deng Z. Eudragit S100-Coated Chitosan Nanoparticles Co-loading Tat for Enhanced Oral Colon Absorption of Insulin. AAPS PharmSciTech 2017; 18:1277-1287. [PMID: 27480441 DOI: 10.1208/s12249-016-0594-z] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 07/20/2016] [Indexed: 12/31/2022] Open
Abstract
In order to improve oral absorption of insulin, especially the absorption at the colon, Eudragit S100® (ES)-coated chitosan nanoparticles loading insulin and a trans-activating transcriptional peptide (Tat) were employed as the vehicle. In vitro releases of insulin and Tat from ES-coated chitosan nanoparticles had a pH-dependant characteristic. A small amount of the contents was released from the coated nanoparticles at pH 1.2 simulated gastric fluid, while a fairly fast and complete release was observed in pH 7.4 medium. Caco-2 cell was used as the model of cellular transport and uptake studies. The results showed that the cellular transport and uptake of insulin for ES-coated chitosan nanoparticles co-loading insulin and Tat (ES-Tat-cNPs) were about 3-fold and 4-fold higher than those for the nanoparticles loading only insulin (ES-cNPs), respectively. The evaluations in vivo of ES-Tat-cNPs were conducted on diabetic rats and normal minipigs, respectively. The experimental results on rats revealed that the pharmacodynamical bioavailability of ES-Tat-cNPs had 2.16-fold increase compared with ES-cNPs. After oral administration of nanoparticle suspensions to the minipigs, insulin bioavailability of ES-Tat-cNPs was 1.73-fold higher than that of ES-cNPs, and the main absorption site of insulin was probably located in the colon for the two nanoparticles. In summary, this report provided an exploratory means for the improvement of oral absorption of insulin.
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Jia D, Gao Y, Williams GR. Core/shell poly(ethylene oxide)/Eudragit fibers for site-specific release. Int J Pharm 2017; 523:376-85. [PMID: 28344174 DOI: 10.1016/j.ijpharm.2017.03.038] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 03/16/2017] [Accepted: 03/18/2017] [Indexed: 11/22/2022]
Abstract
Electrospinning was used to prepare core/shell fibers containing the active pharmaceutical ingredients indomethacin (IMC) or mebeverine hydrochloride (MB-HCl). The shell of the fibers was fabricated from the pH sensitive Eudragit S100 polymer, while the drug-loaded core was based on the mucoadhesive poly(ethylene oxide) (PEO). Three different drug loadings (from 9 to 23% (w/w) of the core mass) were prepared, and for MB-HCl two different molecular weights of PEO were explored. The resultant fibers generally comprise smooth cylinders, although in some cases defects such as surface particles or flattened or merged fibers were visible. Transmission electron microscopy showed all the systems to have clear core and shell compartments. The drugs are present in the amorphous physical form in the fibers. Dissolution tests found that the fibers can effectively prevent release in acidic conditions representative of the stomach, particularly for the acidic indomethacin. After transfer to a pH 7.4 medium, sustained release over between 6 and 22h is observed. Given the mucoadhesive nature of the PEO core, after dissolution of the shell the fibers will be able to adhere to the walls of the intestinal tract and give sustained local drug release. This renders them promising for the treatment of conditions such as irritable bowel disease and colon cancer.
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Yin J, Xiang C, Song X. Nanoencapsulation of psoralidin via chitosan and Eudragit S100 for enhancement of oral bioavailability. Int J Pharm 2016; 510:203-9. [PMID: 27154253 DOI: 10.1016/j.ijpharm.2016.05.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 03/29/2016] [Accepted: 05/02/2016] [Indexed: 10/21/2022]
Abstract
Psoralidin (PL) has recently been attracting more attention as a new anticancer agent candidate. Nevertheless, peroral administration of PL is largely challenged by its insoluble nature and intestinal efflux. This article aimed to develop a nanoencapsulation formulation of PL using water-soluble chitosan and Eudragit S100 and to evaluate its potential for bioavailability enhancement. PL-loaded nanocapsules (PL-NCs) were prepared by a solvent diffusion and high-pressure homogenization technique with Poloxamer 188 as a stabilizer. The resultant PL-NCs were approximately 132.5nm in particle size and possessed a high entrapment efficiency (98.1%). In vitro release showed that PL was released less from the nanocapsules due to electrostatic complexation. A lipolytic experiment demonstrated that our prepared PL-NCs were not degraded by lipase, in contrast with the most commonly used lipid nanoparticles. Furthermore, PL-NCs appeared to have less affinity for intestinal mucins. Following oral administration, the bioavailability of PL was significantly enhanced via the PL-NCs, with a value of 339.02% relative to the reference (suspensions). Excellent intestinal adhesion and transepithelial permeability accounted for the enhancement of oral bioavailability. Taken together, these results indicate that nanoencapsulation of PL with chitosan and Eudragit S100 is a promising strategy for improved PL oral delivery.
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Affiliation(s)
- Juntao Yin
- Department of Pharmaceutics, Huaihe Hospital Affiliated with Henan University, No. 1 Baobei Road, Kaifeng 475000, PR China
| | - Cuiyu Xiang
- Department of Pharmaceutics, Huaihe Hospital Affiliated with Henan University, No. 1 Baobei Road, Kaifeng 475000, PR China
| | - Xiaoyong Song
- Department of Pharmaceutics, Huaihe Hospital Affiliated with Henan University, No. 1 Baobei Road, Kaifeng 475000, PR China.
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Hadi MA, Raghavendra Rao NG, Srinivasa Rao A. Pharmacokinetic Parameters Determination and In Vitro-In Vivo Correlation of Ileocolonic-Targeted pH-Responsive Coated Mini-Tablets of Naproxen. Sci Pharm 2015; 83:645-58. [PMID: 26839845 PMCID: PMC4727758 DOI: 10.3797/scipharm.1503-16] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 06/02/2015] [Indexed: 11/22/2022] Open
Abstract
This research work aims to determine the pharmacokinetic parameters and in vitro-in vivo correlation of the selected ileocolonic-targeted coated mini-tablet filled capsule formulation of naproxen. The pure suspension and coated mini-tablet filled capsule formulation of naproxen were administered to adult albino rabbits through the oral route. The samples were analyzed for naproxen by an HPLC method. For the pure drug suspension, the peak plasma concentration was found as 8.499±0.029 μg/ml at 1.139±0.010 hours and the half-life was found to be 9.459±0.387 hours, whereas for the formulation the peak plasma concentration was found as 6.814±0.037 μg/ml at 8.042±0.069 hours and the half-life was found to be 19.657±0.359 hours. This decreased the peak plasma concentration at a delayed time and increased the half-life of the capsule formulation in comparison with the pure drug suspension which showed that naproxen was only targeted to the ileocolonic region. A significant in vitro-in vivo correlation (i.e. R(2)=0.9901) was also obtained. Thus, the results of these findings suggest that naproxen formulated as coated mini-tablets can be suitable for targeted ileocolonic drug delivery.
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Affiliation(s)
- Mohd Abdul Hadi
- Department of Pharmaceutics, Bhaskar Pharmacy College, Yenkapally (V), Moinabad (M), R. R. District, Hyderabad-500075, Telangana, India
| | - Nidagurthi Guggilla Raghavendra Rao
- Department of Pharmaceutics, Sree Chaitanya Institute of Pharmaceutical Sciences, LMD Colony, Thimmapur, Karimnagar-505001, Telangana, India
| | - Avanapu Srinivasa Rao
- Bhaskar Pharmacy College, Yenkapally (V), Moinabad (M), R. R. District, Hyderabad-500075, Telangana, India
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Subudhi MB, Jain A, Jain A, Hurkat P, Shilpi S, Gulbake A, Jain SK. Eudragit S100 Coated Citrus Pectin Nanoparticles for Colon Targeting of 5-Fluorouracil. Materials (Basel) 2015; 8:832-49. [PMID: 28787974 DOI: 10.3390/ma8030832] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 02/06/2015] [Accepted: 02/13/2015] [Indexed: 01/10/2023]
Abstract
In the present study, Eudragit S100 coated Citrus Pectin Nanoparticles (E-CPNs) were prepared for the colon targeting of 5-Fluorouracil (5-FU). Citrus pectin also acts as a ligand for galectin-3 receptors that are over expressed on colorectal cancer cells. Nanoparticles (CPNs and E-CPNs) were characterized for various physical parameters such as particle size, size distribution, and shape etc. In vitro drug release studies revealed selective drug release in the colonic region in the case of E-CPNs of more than 70% after 24 h. In vitro cytoxicity assay (Sulphorhodamine B assay) was performed against HT-29 cancer cells and exhibited 1.5 fold greater cytotoxicity potential of nanoparticles compared to 5-FU solution. In vivo data clearly depicted that Eudragit S100 successfully guarded nanoparticles to reach the colonic region wherein nanoparticles were taken up and showed drug release for an extended period of time. Therefore, a multifaceted strategy is introduced here in terms of receptor mediated uptake and pH-dependent release using E-CPNs for effective chemotherapy of colorectal cancer with uncompromised safety and efficacy.
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Abstract
Objective: The objective of present work is to develop and evaluate a matrix system for Chronotherapeutic delivery of centrally acting of opioid analgesic (tramadol HCl) to treat nocturnal symptoms of arthritis using almond gum as carrier. Materials and Methods: Matrix tablets of tramadol HCl were prepared by using 30, 40, 50, 60 and 70% w/w of tablet of gum badam as carrier by wet granulation technique. These tablets were compression coated with eudragit S100 to prevent drug release in stomach. All formulations were evaluated for hardness, friability, weight variation, drug content, in vitro and in vivo studies. The almond gum was characterized by viscosity measurements and Fourier transform infrared analysis. The coated (FC1 to FC5) and uncoated tablets (F1 to F5) were evaluated for in vitro release of tramadol HCl after sequential exposure to pH 1.2, pH 7.4 and pH 6.8 respectively for 2 h, 3 h and 19 h in the absence as well as presence of rat caecal content and the corresponding data was fitted to popular release kinetic equations in order to evaluate the release mechanisms-kinetics. The selected formulation was subjected to in vivo targeting efficacy studies by roentgenography technique. Results and Discussion: In vitro release studies indicated that the matrix tablets (F1 to F5) failed to control the drug release in the physiological environment of stomach and small intestine. On the other hand, compression coated formulations were able to protect the tablet cores from premature drug release. Presence of rat caecal content enhances the drug release from the tablets as the concentration of polymer increased, drug release was found to be retarded. The release of tramadol from all the formulation followed zero order with non fickian diffusion. X-ray studies confirmed that the tablet successfully reached colon without getting disintegrated in upper gastrointestinal tract. Conclusion: Based on the results, selective delivery of tramadol HCl to the colon could be achieved using 60% w/w (FC4) of almond gum matrix tablets compression coated with eudragit S100.
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Affiliation(s)
| | - Y Indira Muzib
- Institute of Pharmaceutical Technology, Sri Padmavathi Mahila University, Tirupathi, Andhra Pradesh, India
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Naeem M, Kim W, Cao J, Jung Y, Yoo JW. Enzyme/pH dual sensitive polymeric nanoparticles for targeted drug delivery to the inflamed colon. Colloids Surf B Biointerfaces 2014; 123:271-8. [PMID: 25266978 DOI: 10.1016/j.colsurfb.2014.09.026] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 08/31/2014] [Accepted: 09/14/2014] [Indexed: 11/18/2022]
Abstract
Novel nanoparticles whose drug release profiles are controlled by both enzyme and pH were prepared for the colon-specific drug delivery using a polymeric mixture of enzyme-sensitive azo-polyurethane and pH-sensitive Eudragit S100 (ES-Azo.pu). The enzyme/pH dual sensitive nanoparticles were designed to release a drug based on a two-fold approach which specifically aimed to target drug delivery to the inflamed colon while preventing the burst release of drugs in the stomach and small intestine. Single pH-sensitive (ES) and dual sensitive (ES-Azo.pu) nanoparticles were prepared using an oil-in-water emulsion solvent evaporation method and coumarin-6 (C-6) was used as a model drug. The successful formation of ES and ES-azo.pu nanoparticles that have 214 nm and 244 nm in mean particle size, respectively, was confirmed by scanning electron microscopy and qNano. ES nanoparticles showed almost 100% of burst drug release at pH 7.4, whereas ES-Azo.pu nanoparticles prevented the burst drug release at pH 7.4, followed by a sustained release phase thereafter. Furthermore, ES-Azo.pu nanoparticles exhibited enzyme-triggered drug release in the presence of rat cecal contents obtained from a rat model of colitis. An in vivo localization study in rat gastrointestinal tract demonstrated that ES-Azo.pu nanoparticles were selectively distributed in the inflamed colon, showing 5.5-fold higher C-6 than ES nanoparticles. In conclusion, the enzyme/pH dual sensitive nanoparticles presented in this study can serve as a promising strategy for colon-specific drug delivery against inflammatory bowel disease and other colon disorders.
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Affiliation(s)
- Muhammad Naeem
- College of Pharmacy, Pusan National University, Busan 609-735, South Korea
| | - Wooseong Kim
- College of Pharmacy, Pusan National University, Busan 609-735, South Korea
| | - Jiafu Cao
- College of Pharmacy, Pusan National University, Busan 609-735, South Korea
| | - Yunjin Jung
- College of Pharmacy, Pusan National University, Busan 609-735, South Korea
| | - Jin-Wook Yoo
- College of Pharmacy, Pusan National University, Busan 609-735, South Korea.
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Hu D, Liu L, Chen W, Li S, Zhao Y. A novel preparation method for 5-aminosalicylic acid loaded Eudragit S100 nanoparticles. Int J Mol Sci 2012; 13:6454-68. [PMID: 22754377 DOI: 10.3390/ijms13056454] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Revised: 04/22/2012] [Accepted: 05/22/2012] [Indexed: 11/29/2022] Open
Abstract
In this study, solution enhanced dispersion by supercritical fluids (SEDS) technique was applied for the preparation of 5-aminosalicylic acid (5-ASA) loaded Eudragit S100 (EU S100) nanoparticles. The effects of various process variables including pressure, temperature, 5-ASA concentration and solution flow rate on morphology, particle size, 5-ASA loading and entrapment efficiency of nanoparticles were investigated. Under the appropriate conditions, drug-loaded nanoparticles exhibited a spherical shape and small particle size with narrow particle size distribution. In addition, the nanoparticles prepared were characterized by X-ray diffraction, Differential scanning calorimetry and Fourier transform infrared spectroscopy analyses. The results showed that 5-ASA was imbedded into EU S100 in an amorphous state after SEDS processing and the SEDS process did not induce degradation of 5-ASA.
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Abstract
BACKGROUND Particulate systems have received increasing attention for oral delivery of biomolecules. The objective of the present study was to prepare submicron particulate formulations of papain for pH-dependent site-specific release using pH-sensitive polymers. METHODS Enteric submicron particle formulations of papain were prepared by w/o/w emulsion solvent evaporation using hydroxypropyl methylcellulose phthalate (HPMCP), Eudragit L100, and Eudragit S100, to avoid gastric inactivation of papain. RESULTS Smaller internal and external aqueous phase volumes provided maximum encapsulation efficiency (75.58%-82.35%), the smallest particle size (665.6-692.4 nm), and 25%-30% loss of enzyme activity. Release studies in 0.1 N HCl confirmed the gastroresistance of the formulations. The anionic submicron particles aggregated in 0.1 N HCl (ie, gastric pH 1.2) due to protonation of carboxylic groups in the enteric polymer. Aggregates < 500 μm size would not impede gastric emptying. However, at pH > 5.0 (duodenal pH), the submicron particles showed deaggregation due to restoration of surface charge. HPMCP submicron particles facilitated almost complete release of papain within 30 minutes at pH 6.0, while Eudragit L100 and Eudragit S100 particles released 88.82% and 53.00% of papain at pH 6.8 and pH 7.4, respectively, according to the Korsmeyer-Peppas equation. Sodium dodecyl sulfate polyacrylamide gel electrophoresis and fluorescence spectroscopy confirmed that the structural integrity of the enzyme was maintained during encapsulation. Fourier transform infrared spectroscopy revealed entrapment of the enzyme, with powder x-ray diffraction and differential scanning calorimetry indicating an amorphous character, and scanning electron microscopy showing that the submicron particles had a spherical shape. CONCLUSION In simulated gastrointestinal pH conditions, the HPMCP, Eudragit L100, and Eudragit S100 submicron particles showed good digestion of paneer and milk protein, and could serve as potential carriers for oral enzyme delivery. Stability studies indicated that formulations with approximately 6% overage would ensure a two-year shelf-life at room temperature.
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Affiliation(s)
- Manu Sharma
- Department of Pharmacy, Banasthali Vidhyapith, Banasthali, India
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Khan MS, Sridhar BK, Srinatha A. Development and Evaluation of pH-Dependent Micro Beads for Colon Targeting. Indian J Pharm Sci 2011; 72:18-23. [PMID: 20582185 PMCID: PMC2883222 DOI: 10.4103/0250-474x.62230] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2009] [Revised: 09/30/2009] [Accepted: 12/17/2009] [Indexed: 11/25/2022] Open
Abstract
The purpose of this research was to develop and evaluate multiparticulates of alginate and chitosan hydrogel beads exploiting pH sensitive property for colon-targeted delivery of theophylline. Alginate and chitosan beads were prepared by ionotropic gelation method followed by enteric coating with Eudragit S100. All formulations were evaluated for particle size, encapsulation efficiency, swellability and in vitro drug release.In vitro dissolution studies performed following pH progression method demonstrated that the drug release from coated beads depends on coat weights applied and pH of dissolution media. Mechanism of drug release was found to be swelling and erosion-dependent. The studies showed that formulated alginate and chitosan beads can be used effectively for the delivery of drug to colon and a coat weight of 20% weight gain was sufficient to impart an excellent gastro resistant property to the beads for effective release of drug at higher pH values.
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Affiliation(s)
- M S Khan
- Department of Pharmaceutics, National College of Pharmacy, Shivamogga-577 201, India
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Dandagi PM, Mastiholimath VS, Gadad AP, Kulkarni AR, Konnur BK. pH-Sensitive Mebeverine Microspheres for Colon Delivery. Indian J Pharm Sci 2011; 71:464-8. [PMID: 20502560 PMCID: PMC2865826 DOI: 10.4103/0250-474x.57303] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2008] [Revised: 04/23/2009] [Accepted: 08/11/2009] [Indexed: 11/23/2022] Open
Abstract
Mebeverine hydrochloride is known to suffer from extensive first pass effect. In an attempt to improve its oral bioavailability and possibility to restrict its absorption only to the colon, mebeverine microspheres were prepared by emulsion solvent evaporation method. Four formulations were prepared with varying drug and polymer ratio. These formulations were subjected to various evaluation parameters like percent practical yield, entrapment efficiency, particle size, in vitro drug release, in vivo activity. Practical yield of the microspheres was up to 89.59% with encapsulation efficiency up to 79.4%. Scanning electron microscopy confirmed that the microsphere structures were smooth, spherical, and discrete and the particles were of the size range 200 to 300 μm. In vitro release of the drug showed biphasic release pattern with non-Fickian diffusion release in 12 h. On the basis of drug content, particle size, in vitro release and in vivo studies, formulation F-3 was found to be optimal. Antiirritable bowel syndrome activity was performed in colorectal distention in rat, which is a model for constipation-induced irritable bowel syndrome. The formulations F-2 and F-3 showed significant effect in fecal output when compared to the control as well as the marketed preparation in the constipation-induced irritable bowel syndrome in rats.
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Affiliation(s)
- P M Dandagi
- Department of Pharmaceutics, K. L. E. S's College of Pharmacy, J. N. M. C. Campus, Nehru Nagar, Belgaum-590 010, India
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