1
|
Laylani LAASS, Al-dolaimy F, Altharawi A, Sulaman GM, Mustafa MA, Alkhafaji AT, Alkhatami AG. Electrochemical DNA-nano biosensor for the detection of Goserelin as anticancer drug using modified pencil graphite electrode. Front Oncol 2024; 14:1321557. [PMID: 38751811 PMCID: PMC11094254 DOI: 10.3389/fonc.2024.1321557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 03/22/2024] [Indexed: 05/18/2024] Open
Abstract
Goserelin is an effective anticancer drug, but naturally causes several side effects. Hence the determination of this drug in biological samples, plays a key role in evaluating its effects and side effects. The current studies have concentrated on monitoring Goserelin using an easy and quick DNA biosensor for the first time. In this study, copper(II) oxide nanoparticles were created upon the surface of multiwalled carbon nanotubes (CuO/MWCNTs) as a conducting mediator. The modified pencil graphite electrode (ds-DNA/PA/CuO/MWCNTs/PGE) has been modified with the help of polyaniline (PA), ds-DNA, and CuO/MWCNTs nanocomposite. Additionally, the issue with the bio-electroanalytical guanine oxidation signal in relation to ds-DNA at the surface of PA/CuO/MWCNTs/PGE has been examined to determination Goserelin for the first time. It also, established a strong conductive condition to determination Goserelin in nanomolar concentration. Thus, Goserelin's determining, however, has a 0.21 nM detection limit and a 1.0 nM-110.0 µM linear dynamic range according to differential pulse voltammograms (DPV) of ds-DNA/PA/CuO/MWCNTs/PGE. Furthermore, the molecular docking investigation highlighted that Goserelin is able to bind ds-DNA preferentially and supported the findings of the experiments. The determining of Goserelin in real samples has been effectively accomplished in the last phase using ds-DNA/PA/CuO/MWCNTs/PGE.
Collapse
Affiliation(s)
| | - F. Al-dolaimy
- Community Health Department, Al-Zahraa University for Women, Karbala, Iraq
| | - Ali Altharawi
- Department of Pharmaceutical Chemistry, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
| | - Ghasen M. Sulaman
- Department of Medical Laboratories, Sawa University, Almuthana, Iraq
| | - Mohammed Ahmed Mustafa
- Department of Medical Laboratory Technology, University of Imam Jaafar AL-Sadiq, Baghdad, Iraq
| | | | - Ali G. Alkhatami
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia
| |
Collapse
|
2
|
Sheikhi M, Nemayandeh N, Shirangi M. Peptide Acylation in Aliphatic Polyesters: a Review of Mechanisms and Inhibition Strategies. Pharm Res 2024; 41:765-778. [PMID: 38504074 DOI: 10.1007/s11095-024-03682-6] [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: 10/10/2023] [Accepted: 02/24/2024] [Indexed: 03/21/2024]
Abstract
Biodegradable polyesters are widely employed in the development of controlled release systems for peptide drugs. However, one of the challenges in developing a polyester-based delivery system for peptides is the acylation reaction between peptides and polymers. Peptide acylation is an important factor that affects formulation stability and can occur during storage, in vitro release, and after drug administration. This review focuses on the mechanisms and parameters that influence the rate of peptide acylation within polyesters. Furthermore, it discusses reported strategies to minimize the acylation reaction.
Collapse
Affiliation(s)
- Mojgan Sheikhi
- Department of Drug and Food Control, Faculty of Pharmacy, Tehran University of Medical Science Tehran, Tehran, Iran
| | - Nasrin Nemayandeh
- Department of Drug and Food Control, Faculty of Pharmacy, Tehran University of Medical Science Tehran, Tehran, Iran
| | - Mehrnoosh Shirangi
- Department of Drug and Food Control, Faculty of Pharmacy, Tehran University of Medical Science Tehran, Tehran, Iran.
| |
Collapse
|
3
|
Sun H, Luo W, Huang X. Recent Advances in the Preparation of Protein/peptide Microspheres by Solvent Evaporation Method. Curr Pharm Biotechnol 2024; 25:1807-1817. [PMID: 38178679 DOI: 10.2174/0113892010261032231214115415] [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: 07/07/2023] [Revised: 08/25/2023] [Accepted: 09/19/2023] [Indexed: 01/06/2024]
Abstract
Protein/peptide drugs are extensively used to treat various chronic and serious diseases. The short half-life in vivo of protein and peptide as therapeutics drug limit the realization of complete effects. Encapsulating drugs in microspheres can slow the speed of drug release and prolong the efficacy of drugs. The solvent evaporation method is widely used to prepare protein/ peptide microspheres because of its facile operation and minimal equipment requirements. This method has several challenges in the lower encapsulation efficiency, fluctuant release profiles and the stabilization of protein/peptides, which researchers believe may be solved by adjusting the preparation parameter or formulation of microspheres. The article discusses the formulation parameters that govern the preparation of protein/peptide-loaded microspheres by the solvent evaporation method, which provides an overview of the current promising strategies for solvent evaporation for protein/peptide microspheres. The article takes parameter evaluation as the framework, facilitating subsequent researchers to quickly find possible solutions when encountering problems.
Collapse
Affiliation(s)
- Huayan Sun
- Department of Pharmacy, Medical Supplies Center, PLA General Hospital, Beijing, 100853, China
| | - Weiwei Luo
- Department of Pharmacy, Medical Supplies Center, PLA General Hospital, Beijing, 100853, China
| | - Xiaowu Huang
- Department of Pharmacy, Medical Supplies Center, PLA General Hospital, Beijing, 100853, China
| |
Collapse
|
4
|
Kim Y, Park EJ, Kim TW, Na DH. Recent Progress in Drug Release Testing Methods of Biopolymeric Particulate System. Pharmaceutics 2021; 13:1313. [PMID: 34452274 PMCID: PMC8399039 DOI: 10.3390/pharmaceutics13081313] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 08/16/2021] [Accepted: 08/16/2021] [Indexed: 12/18/2022] Open
Abstract
Biopolymeric microparticles have been widely used for long-term release formulations of short half-life chemicals or synthetic peptides. Characterization of the drug release from microparticles is important to ensure product quality and desired pharmacological effect. However, there is no official method for long-term release parenteral dosage forms. Much work has been done to develop methods for in vitro drug release testing, generally grouped into three major categories: sample and separate, dialysis membrane, and continuous flow (flow-through cell) methods. In vitro drug release testing also plays an important role in providing insight into the in vivo performance of a product. In vitro release test with in vivo relevance can reduce the cost of conducting in vivo studies and accelerate drug product development. Therefore, investigation of the in vitro-in vivo correlation (IVIVC) is increasingly becoming an essential part of particulate formulation development. This review summarizes the principles of the in vitro release testing methods of biopolymeric particulate system with the recent research articles and discusses their characteristics including IVIVC, accelerated release testing methods, and stability of encapsulated drugs.
Collapse
Affiliation(s)
- Yejin Kim
- College of Pharmacy, Chung-Ang University, Seoul 06974, Korea; (Y.K.); (T.W.K.)
- G2GBIO, Inc., Daejeon 34054, Korea
| | | | - Tae Wan Kim
- College of Pharmacy, Chung-Ang University, Seoul 06974, Korea; (Y.K.); (T.W.K.)
| | - Dong Hee Na
- College of Pharmacy, Chung-Ang University, Seoul 06974, Korea; (Y.K.); (T.W.K.)
| |
Collapse
|
5
|
Mohajeri S, Amsden BG. In Vivo Degradation Mechanism and Biocompatibility of a Biodegradable Aliphatic Polycarbonate: Poly(Trimethylene Carbonate- co-5-Hydroxy Trimethylene Carbonate). ACS APPLIED BIO MATERIALS 2021; 4:3686-3696. [PMID: 35014453 DOI: 10.1021/acsabm.1c00160] [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] [Indexed: 11/29/2022]
Abstract
A recently developed viscous liquid aliphatic polycarbonate, poly(trimethylene carbonate-co-5-hydroxy trimethylene carbonate), has advantageous properties for the delivery of acid-sensitive drugs such as proteins and peptides. This copolymer degrades in vitro via an alkaline-catalyzed intramolecular cyclization reaction yielding oligo (trimethylene carbonate), glycerol, and carbon dioxide, but its in vivo degradation mechanisms are presently unknown. The in vivo degradation mechanism and tissue response to this copolymer were investigated following subcutaneous implantation in Wistar rats. The molecular weight and composition of the copolymer varied in the same manner following subcutaneous implantation as observed in vitro. These findings suggest that the copolymer also degraded in vivo principally via intramolecular cyclization. The tissue response in terms of the inflammatory zone cell density, fibrous capsule thickness, and macrophage response was intermediate to that of two clinically used biodegradable sutures, Vicryl and Monocryl, indicating that the copolymer can be considered biotolerable. Collectively, the data show that further development of this copolymer as a drug delivery material is warranted.
Collapse
Affiliation(s)
- Sara Mohajeri
- Department of Chemical Engineering, Queen's University, Kingston, Ontario K7L 3N6, Canada.,Human Mobility Research Centre, Kingston General Hospital, Kingston, Ontario K7L 2V7, Canada
| | - Brian G Amsden
- Department of Chemical Engineering, Queen's University, Kingston, Ontario K7L 3N6, Canada.,Human Mobility Research Centre, Kingston General Hospital, Kingston, Ontario K7L 2V7, Canada
| |
Collapse
|
6
|
Zhang C, Yang L, Wan F, Bera H, Cun D, Rantanen J, Yang M. Quality by design thinking in the development of long-acting injectable PLGA/PLA-based microspheres for peptide and protein drug delivery. Int J Pharm 2020; 585:119441. [PMID: 32442645 DOI: 10.1016/j.ijpharm.2020.119441] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 05/13/2020] [Accepted: 05/14/2020] [Indexed: 12/20/2022]
Abstract
Adopting the Quality by Design (QbD) approach in the drug development process has transformed from "nice-to-do" into a crucial and required part of the development, ensuring the quality of pharmaceutical products throughout their whole life cycles. This review is discussing the implementation of the QbD thinking into the production of long-acting injectable (LAI) PLGA/PLA-based microspheres for the therapeutic peptide and protein drug delivery. Various key elements of the QbD approaches are initially elaborated using Bydureon®, a commercial product of LAI PLGA/PLA-based microspheres, as a classical example. Subsequently, the factors influencing the release patterns and the stability of the peptide and protein drugs are discussed. This is followed by a summary of the state-of-the-art of manufacturing LAI PLGA/PLA-based microspheres and the related critical process parameters (CPPs). Finally, a landscape of generic product development of LAI PLGA/PLA-based microspheres is reviewed including some major challenges in the field.
Collapse
Affiliation(s)
- Chengqian Zhang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Wenhua Road 103, 110016 Shenyang, China
| | - Liang Yang
- CSPC ZhongQi Pharmaceutical Technology (Shijiazhuang) Company, Ltd, Huanghe Road 226, 050035 Shijiazhuang, China
| | - Feng Wan
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Hriday Bera
- Wuya College of Innovation, Shenyang Pharmaceutical University, Wenhua Road 103, 110016 Shenyang, China
| | - Dongmei Cun
- Wuya College of Innovation, Shenyang Pharmaceutical University, Wenhua Road 103, 110016 Shenyang, China
| | - Jukka Rantanen
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Mingshi Yang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Wenhua Road 103, 110016 Shenyang, China; Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark.
| |
Collapse
|
7
|
Mohajeri S, Chen F, de Prinse M, Phung T, Burke-Kleinman J, Maurice DH, Amsden BG. Liquid Degradable Poly(trimethylene-carbonate-co-5-hydroxy-trimethylene carbonate): An Injectable Drug Delivery Vehicle for Acid-Sensitive Drugs. Mol Pharm 2020; 17:1363-1376. [DOI: 10.1021/acs.molpharmaceut.0c00064] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Sara Mohajeri
- Department of Chemical Engineering, Queen’s University, Kingston, Ontario K7L 3N6, Canada
- Human Mobility Research Centre, Kingston General Hospital, Kingston, Ontario K7L 2V7, Canada
| | - Fei Chen
- Department of Chemical Engineering, Queen’s University, Kingston, Ontario K7L 3N6, Canada
- Human Mobility Research Centre, Kingston General Hospital, Kingston, Ontario K7L 2V7, Canada
- Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Mitchell de Prinse
- Department of Chemical Engineering, Queen’s University, Kingston, Ontario K7L 3N6, Canada
- Human Mobility Research Centre, Kingston General Hospital, Kingston, Ontario K7L 2V7, Canada
| | - Ta Phung
- Department of Chemical Engineering, Queen’s University, Kingston, Ontario K7L 3N6, Canada
- Human Mobility Research Centre, Kingston General Hospital, Kingston, Ontario K7L 2V7, Canada
| | - Jonah Burke-Kleinman
- Department of Biomedical and Molecular Sciences, Queen’s University, Kingston K7L 3N6, Canada
| | - Donald H. Maurice
- Department of Biomedical and Molecular Sciences, Queen’s University, Kingston K7L 3N6, Canada
| | - Brian G. Amsden
- Department of Chemical Engineering, Queen’s University, Kingston, Ontario K7L 3N6, Canada
- Human Mobility Research Centre, Kingston General Hospital, Kingston, Ontario K7L 2V7, Canada
| |
Collapse
|
8
|
Liu J, Xu Y, Wang Y, Ren H, Meng Z, Liu K, Liu Z, Huang H, Li X. Proton Oriented-"Smart Depot" for Responsive Release of Ca 2+ to Inhibit Peptide Acylation in PLGA Microspheres. Pharm Res 2019; 36:119. [PMID: 31165279 DOI: 10.1007/s11095-019-2640-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 05/06/2019] [Indexed: 12/17/2022]
Abstract
PURPOSE The purpose of this study was to characterize and detail the mechanism of a smart Ca2+ release depot (Ca3(PO4)2) about its ability for sustainable inhibition on peptide acylation within PLGA microspheres. METHODS The octreotide acetate release and acylation kinetics were analyzed by RP-HPLC. Changes of Ca2+ concentration and adsorption behavior were determined by a Calcium Colorimetric Assay Kit. The inner pH changes were delineated by a classic pH sensitive probe, Lysosensor yellow/ blue® dextran. Morphological changes of microspheres, adsorption between polymer and additive, transformation of Ca3(PO4)2 were characterized using SEM, FTIR and SSNMR separately. RESULTS Before and after microspheres formulation, the property and effectiveness of Ca3(PO4)2 were investigated. Compared with a commonly used calcium salt (CaCl2), high encapsulation efficiency (96.56%) of Ca3(PO4)2 guarantees lasting effectiveness. In an increasingly acidic environment that simulated polymer degradation, the poorly water-soluble Ca3(PO4)2 could absorb protons and transform into the more and more soluble CaHPO4 and Ca(H2PO4)2 to produce sufficient Ca2+ according to severity of acylation. The corresponding Ca2+ produce capacity fully met the optimum inhibition requirement since the real-time adsorption sites (water-soluble carboxylic acids) inside the degrading microspheres were rare. A sustained retention of three switchable calcium salts and slow release of Ca2+ were observed during the microsphere incubation. FTIR results confirmed the long-term inhibition effect induced by Ca3(PO4)2 on the adsorption between drug and polymer. CONCLUSIONS With the presence of the smart Ca2+ depot (Ca3(PO4)2) in the microspheres, a sustainable and long-term inhibition of peptide acylation was achieved.
Collapse
Affiliation(s)
- Jiwei Liu
- School of Pharmaceutical Science, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
| | - Yan Xu
- School of Pharmaceutical Science, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
| | - Yonglu Wang
- School of Pharmaceutical Science, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
| | - Hao Ren
- School of Pharmaceutical Science, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
| | - Zhengjie Meng
- School of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
| | - Kuntang Liu
- School of Pharmaceutical Science, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
| | - Zhe Liu
- School of Pharmaceutical Science, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
| | - He Huang
- School of Pharmaceutical Science, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China.
| | - Xueming Li
- School of Pharmaceutical Science, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China.
| |
Collapse
|
9
|
Effect of inner pH on peptide acylation within PLGA microspheres. Eur J Pharm Sci 2019; 134:69-80. [DOI: 10.1016/j.ejps.2019.04.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 04/07/2019] [Accepted: 04/14/2019] [Indexed: 01/31/2023]
|
10
|
Poly(lactic acid)/poly(lactic-co-glycolic acid) particulate carriers for pulmonary drug delivery. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2019. [DOI: 10.1007/s40005-019-00443-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
11
|
Guo N, Zhang Q, Sun Y, Yang H. Separation and identification of acylated leuprorelin inside PLGA microspheres. Int J Pharm 2019; 560:273-281. [PMID: 30731258 DOI: 10.1016/j.ijpharm.2019.01.061] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 01/11/2019] [Accepted: 01/27/2019] [Indexed: 12/15/2022]
Abstract
Studies have shown that the N-terminus and lysine side residue of peptides are prone to acylation in poly(d,l-lactide-co-glycolide) (PLGA) microspheres. Peptides such as leuprorelin lack a free N-terminus or lysine and only contain serine, arginine, and tyrosine as nucleophilic residues. The purpose of this study was to detect potential acylation impurities and determine their corresponding acylation sites in commercial leuprorelin-loaded PLGA microspheres. Commercial samples from three vendors were selected as targets for our study. The high-performance liquid chromatography (HPLC) conditions of the European Pharmacopoeia were used to separate and collect impurities. HPLC-tandem mass spectrometry (HPLC-MS/MS) was applied to confirm both the structure and acylation sites of the impurities. Our study demonstrated that impurities originating from both degradation of microspheres and synthesis of leuprorelin were well separated and identified using these HPLC conditions. HPLC-MS/MS analysis of acylated leuprorelin showed that diglycoyl, lactoyl-glycoyl, dilactoyl, and monolactoyl groups were conjugated to serine in leuprorelin-loaded PLGA microspheres. This is the first report showing serine to be the acylation site in peptide-loaded PLGA microspheres. Separation and identification of acylated leuprorelin derivatives will assist in minimising acylation and guiding the development of quality control for commercial leuprorelin-loaded PLGA microspheres.
Collapse
Affiliation(s)
- Ningzi Guo
- National Institutes for Food and Drug Control, No. 31, Huatuo Road, Daxing District, Beijing 102629, China
| | - Qi Zhang
- Genova Biotechnology Corporation, No. 7, Hanshan Road, Xinbei District, Changzhou 213125, China
| | - Yue Sun
- National Institutes for Food and Drug Control, No. 31, Huatuo Road, Daxing District, Beijing 102629, China
| | - Huaxin Yang
- National Institutes for Food and Drug Control, No. 31, Huatuo Road, Daxing District, Beijing 102629, China.
| |
Collapse
|
12
|
Saka C. Chromatographic Methods for Determination of Drugs Used in Prostate Cancer in Biological and Pharmacological Samples. Crit Rev Anal Chem 2018; 49:78-99. [DOI: 10.1080/10408347.2018.1487776] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Cafer Saka
- School of Healthy, Siirt University, Siirt, Turkey
| |
Collapse
|
13
|
Thi THH, Priemel PA, Karrout Y, Driss V, Delbeke M, Dendooven A, Flament MP, Capron M, Siepmann J. Preparation and investigation of P28GST-loaded PLGA microparticles for immunomodulation of experimental colitis. Int J Pharm 2017; 533:26-33. [PMID: 28923765 DOI: 10.1016/j.ijpharm.2017.09.037] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 09/12/2017] [Accepted: 09/14/2017] [Indexed: 01/07/2023]
Abstract
The aim of this work was to prepare and characterize (in vitro and in vivo) PLGA-based microparticles loaded with an enzymatic protein derived from the helminth parasite Schistosoma haematobium: glutathione S-transferase P28GST (P28GST). This protein is not only a promising candidate vaccine against schistosomiasis, it also exhibits interesting immunomodulating effects, which can be helpful for the regulation of inflammatory diseases. Helminths express a regulatory role on intestinal inflammation, and immunization by P28GST has recently been shown to be as efficient as infection to reduce inflammation in a murine colitis model. As an alternative to the combination with a classical adjuvant, long acting P28GST microparticles were prepared in order to induce colitis prevention. PLGA was used as biodegradable and biocompatible matrix former, and a W/O/W emulsion/solvent extraction technique applied to prepare different types of microparticles. The effects of key formulation and processing parameters (e.g., the polymer molecular weight, drug loading, W/O/W phase volumes and stirring rates of the primary/secondary emulsions) on the systems' performance were studied. Microparticles providing about constant P28GST release during several weeks were selected and their effects in an experimental model of colitis evaluated. Mice received P28GST-loaded or P28GST-free PLGA microparticles (s.c.) on Day 0, and optionally also on Days 14 and 28. Colitis was induced on Day 35, the animals were sacrificed on Day 37. Interestingly, the Wallace score (being a measure of the severity of the inflammation) was significantly lower in mice treated with P28GST microparticles compared to placebo after 1 or 3 injections. As immunogenicity markers, increased anti-P28GST IgG levels were detected after three P28GST PLGA microparticle injections, but not in the control groups. Thus, the proposed microparticles offer an interesting potential for the preventive treatment of experimental colitis, while the underlying mechanism of action is still to be investigated.
Collapse
Affiliation(s)
- T H Hoang Thi
- Univ. Lille, Inserm, CHU Lille, U1008 - Controlled Drug Delivery Systems and Biomaterials, F-59000 Lille, France
| | - P A Priemel
- Univ. Lille, Inserm, CHU Lille, U1008 - Controlled Drug Delivery Systems and Biomaterials, F-59000 Lille, France
| | - Y Karrout
- Univ. Lille, Inserm, CHU Lille, U1008 - Controlled Drug Delivery Systems and Biomaterials, F-59000 Lille, France
| | - V Driss
- Univ. Lille, Inserm, CHU Lille, U995 - Inflammation: Regulatory Mechanisms and Interactions With Nutrition and Candidosis, F-59000 Lille, France
| | - M Delbeke
- Univ. Lille, Inserm, CHU Lille, U995 - Inflammation: Regulatory Mechanisms and Interactions With Nutrition and Candidosis, F-59000 Lille, France
| | - A Dendooven
- Univ. Lille, Inserm, CHU Lille, U995 - Inflammation: Regulatory Mechanisms and Interactions With Nutrition and Candidosis, F-59000 Lille, France
| | - M P Flament
- Univ. Lille, Inserm, CHU Lille, U1008 - Controlled Drug Delivery Systems and Biomaterials, F-59000 Lille, France
| | - M Capron
- Univ. Lille, Inserm, CHU Lille, U995 - Inflammation: Regulatory Mechanisms and Interactions With Nutrition and Candidosis, F-59000 Lille, France
| | - J Siepmann
- Univ. Lille, Inserm, CHU Lille, U1008 - Controlled Drug Delivery Systems and Biomaterials, F-59000 Lille, France.
| |
Collapse
|