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Le NMN, Le-Vinh B, Friedl JD, Jalil A, Kali G, Bernkop-Schnürch A. Polyaminated pullulan, a new biodegradable and cationic pullulan derivative for mucosal drug delivery. Carbohydr Polym 2022; 282:119143. [DOI: 10.1016/j.carbpol.2022.119143] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 01/05/2022] [Accepted: 01/11/2022] [Indexed: 11/02/2022]
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2
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Wang Y, Wang G, Moitessier N, Mittermaier AK. Enzyme Kinetics by Isothermal Titration Calorimetry: Allostery, Inhibition, and Dynamics. Front Mol Biosci 2020; 7:583826. [PMID: 33195429 PMCID: PMC7604385 DOI: 10.3389/fmolb.2020.583826] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 09/11/2020] [Indexed: 12/14/2022] Open
Abstract
Isothermal titration calorimetry (ITC) involves accurately measuring the heat that is released or absorbed in real time when one solution is titrated into another. This technique is usually used to measure the thermodynamics of binding reactions. However, there is mounting interest in using it to measure reaction kinetics, particularly enzymatic catalysis. This application of ITC has been steadily growing for the past two decades, and the method is proving to be sensitive, generally applicable, and capable of providing information on enzyme activity that is difficult to obtain using traditional biochemical assays. This review aims to give a broad overview of the use of ITC to measure enzyme kinetics. It describes several different classes of ITC experiment, their strengths and weaknesses, and recent methodological advancements. A summary of applications in the literature is given and several examples where ITC has been used to investigate challenging aspects of enzyme behavior are presented in more detail. These include examples of allostery, where small-molecule binding outside the active site modulates activity. We describe the use of ITC to measure the strength, mode (i.e., competitive, uncompetitive, or mixed), and association and dissociation kinetics of enzyme inhibitors. Further, we provide examples of ITC applied to complex, heterogeneous mixtures, such as insoluble substrates and live cells. These studies exemplify the wide range of problems where ITC can provide answers, and illustrate the versatility of the technique and potential for future development and applications.
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Affiliation(s)
- Yun Wang
- Department of Chemistry, McGill University, Montreal, QC, Canada
| | - Guanyu Wang
- Department of Chemistry, McGill University, Montreal, QC, Canada
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Synthesis and characterization of a non-cytotoxic and biocompatible acrylamide grafted pullulan – Application in pH responsive controlled drug delivery. Int J Biol Macromol 2018; 120:753-762. [DOI: 10.1016/j.ijbiomac.2018.08.123] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 08/20/2018] [Accepted: 08/23/2018] [Indexed: 11/19/2022]
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In vitro and in vivo evaluation of pirfenidone loaded acrylamide grafted pullulan-poly(vinyl alcohol) interpenetrating polymer networks. Carbohydr Polym 2018; 202:288-298. [DOI: 10.1016/j.carbpol.2018.08.135] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 08/13/2018] [Accepted: 08/30/2018] [Indexed: 12/22/2022]
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Soni S, Bhunia BK, Kumari N, Dan S, Mukherjee S, Mandal BB, Ghosh A. Therapeutically Effective Controlled Release Formulation of Pirfenidone from Nontoxic Biocompatible Carboxymethyl Pullulan-Poly(vinyl alcohol) Interpenetrating Polymer Networks. ACS OMEGA 2018; 3:11993-12009. [PMID: 30320284 PMCID: PMC6173564 DOI: 10.1021/acsomega.8b00803] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 09/12/2018] [Indexed: 05/21/2023]
Abstract
The present study was conducted to develop therapeutically effective controlled release formulation of pirfenidone (PFD) and explore the possibility to reduce the total administered dose and dosing regimen. For this purpose, pH-sensitive biomaterial was prepared by inducing carboxymethyl group on pullulan by Williamson ether synthesis reaction, and further, interpenetrating polymeric network microspheres were prepared by glutaraldehyde-assisted water-in-oil (w/o) emulsion cross-linking method, which showed higher swelling ratio in acidic and basic pH. The formation of microspheres was confirmed by different spectral characterization techniques, and thermal kinetic study indicated the formation of thermally stable microspheres. Cell viability and biocompatibility studies on hepatocellular carcinoma (HepG2) cell showed the polymeric matrix to be biocompatible. In vitro dissolution of optimized formulation (F5) showed releases of 54.09 and 76.37% in 0.1 N HCl after 2 h and phosphate buffer (pH 6.8) up to 8 h, respectively. In vivo performances of prepared microsphere and marketed product of PFD were compared in rabbit. T max (time taken to reach peak plasma concentration) was found to be achieved at 0.83 h, compared to 0.5 h for Pirfenex with no significant difference complementing the immediate action, while area under curve was significantly greater for optimized formulation (9768 ± 1300 ng h/mL) compared to Pirfenex (4311 ± 110 ng h/mL), complementing the sustained action. In vivo pharmacokinetic study suggested that the prepared microsphere could be a potential candidate for therapeutically effective controlled delivery of PFD used in dyspnea and cough management due to idiopathic pulmonary fibrosis.
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Affiliation(s)
- Saundray
Raj Soni
- Department
of Pharmaceutical Sciences and Technology, Birla Institute of Technology, Mesra, Ranchi 835215, Jharkhand, India
| | - Bibhas K. Bhunia
- Biomaterial
and Tissue Engineering Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Nimmy Kumari
- Department
of Pharmaceutical Sciences and Technology, Birla Institute of Technology, Mesra, Ranchi 835215, Jharkhand, India
| | - Subhashis Dan
- Division of Pharmaceutics, Department of Pharmaceutical Technology and Bioequivalence
Study Centre, Department of Pharmaceutical Technology, Jadavpur University, Kolkata 700032, India
| | - Sudipta Mukherjee
- Division of Pharmaceutics, Department of Pharmaceutical Technology and Bioequivalence
Study Centre, Department of Pharmaceutical Technology, Jadavpur University, Kolkata 700032, India
| | - Biman B. Mandal
- Biomaterial
and Tissue Engineering Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Animesh Ghosh
- Department
of Pharmaceutical Sciences and Technology, Birla Institute of Technology, Mesra, Ranchi 835215, Jharkhand, India
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Crosslinked hydrogels based on biological macromolecules with potential use in skin tissue engineering. Int J Biol Macromol 2015; 84:174-81. [PMID: 26704998 DOI: 10.1016/j.ijbiomac.2015.12.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Revised: 12/07/2015] [Accepted: 12/10/2015] [Indexed: 12/23/2022]
Abstract
Zero-length crosslinked hydrogels have been synthesized by covalent linking of three natural polymers (collagen, hyaluronic acid and sericin), in the presence of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide and N-hydroxysuccinimide. The hydrogels have been investigated by FT-IR spectroscopy, microcalorimetry, in vitro swelling, enzymatic degradation, and in vitro cell viability studies. The obtained crosslinked hydrogels showed a macroporous structure, high swelling degree and in vitro enzymatic resistance compared to uncrosslinked collagen. The in vitro cell viability studies performed on normal human dermal fibroblasts assessed the sericin proliferation properties indicating a potential use of the hydrogels based on collagen, hyaluronic acid and sericin in skin tissue engineering.
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Ali G, Dulong V, Gasmi SN, Rihouey C, Picton L, Le Cerf D. Covalent immobilization of pullulanase on alginate and study of its hydrolysis of pullulan. Biotechnol Prog 2015; 31:883-9. [DOI: 10.1002/btpr.2093] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 04/21/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Ghina Ali
- Normandie Université; France
- Laboratoire Polymères Biopolymères Surfaces; Université De Rouen; Mont Saint Aignan F 76821 France
- CNRS UMR 6270 & Fr3038; Mont Saint Aignan F 76821 France
| | - Virginie Dulong
- Normandie Université; France
- Laboratoire Polymères Biopolymères Surfaces; Université De Rouen; Mont Saint Aignan F 76821 France
- CNRS UMR 6270 & Fr3038; Mont Saint Aignan F 76821 France
| | - Sarah N. Gasmi
- Normandie Université; France
- Laboratoire Polymères Biopolymères Surfaces; Université De Rouen; Mont Saint Aignan F 76821 France
- CNRS UMR 6270 & Fr3038; Mont Saint Aignan F 76821 France
| | - Christophe Rihouey
- Normandie Université; France
- Laboratoire Polymères Biopolymères Surfaces; Université De Rouen; Mont Saint Aignan F 76821 France
- CNRS UMR 6270 & Fr3038; Mont Saint Aignan F 76821 France
| | - Luc Picton
- Normandie Université; France
- Laboratoire Polymères Biopolymères Surfaces; Université De Rouen; Mont Saint Aignan F 76821 France
- CNRS UMR 6270 & Fr3038; Mont Saint Aignan F 76821 France
| | - Didier Le Cerf
- Normandie Université; France
- Laboratoire Polymères Biopolymères Surfaces; Université De Rouen; Mont Saint Aignan F 76821 France
- CNRS UMR 6270 & Fr3038; Mont Saint Aignan F 76821 France
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Zhang W, Ren B, Jiang Y, Hu Z. Carboxymethylpullulan promoted Cu2O-catalyzed Huisgen-click reaction. RSC Adv 2015. [DOI: 10.1039/c4ra14813d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Cu2O/CMP has been developed as a highly efficient catalytic system for Huisgen-click reaction in water at 60 °C.
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Affiliation(s)
- Weiwei Zhang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
| | - Baoqi Ren
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
| | - Yuqin Jiang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
| | - Zhiguo Hu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
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Hoypierres J, Dulong V, Rihouey C, Alexandre S, Picton L, Thébault P. Two methods for one-point anchoring of a linear polysaccharide on a gold surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 31:254-261. [PMID: 25496460 DOI: 10.1021/la504212k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Two strategies to achieve a one-point anchoring of a hydrolyzed pullulan (P9000) on a gold surface are compared. The first strategy consists of forming a self-assembled monolayer of a 6-amino-1-hexanethiol (AHT) and then achieving reductive amination on the surface between the aminated surface and the aldehyde of the polysaccharide reductive end sugar. The second consists of incorporating a thiol function at the extremity of the pullulan (via the same reductive amination), leading to P9000-AHT and then immobilizing it on gold by a spontaneous reaction between solid gold and thiol. The modified pullulan was characterized by NMR and size-exclusion chromatography coupled to a light-scattering detector. P9000-AHT appears to be in a disulfide dimer form in solution but recovers its unimer form with dithiothreitol (DTT) treatment. The comparison of the two strategies by contact angle and XPS revealed that the second strategy is more efficient for the pullulan one-point anchoring. P9000-AHT even in its dimer form is easily grafted onto the surface. The grafted polymer seems to be more in a coil conformation than in a rigid brush. Furthermore, QCM measurements highlighted that the second strategy leads to a grafting density of around 3.5 × 10(13) molecules·cm(-2) corresponding to a high surface coverage. The elaboration of a dense and oriented layer of polysaccharides covalently linked to a gold surface might enhance the use of such modified polysaccharides in various fields.
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Gasmi SN, Rihouey C, Picton L, Le Cerf D. Hydrolysis of pullulan by entrapped pullulanase in Ca/alginate beads. Biopolymers 2014; 101:938-44. [DOI: 10.1002/bip.22485] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2014] [Revised: 03/10/2014] [Accepted: 03/10/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Sarah Nawel Gasmi
- Normandie Université; Caen France
- Laboratoire Polymères Biopolymères Surfaces; Université de Rouen; F-76821 Mont Saint Aignan France
- CNRS UMR 6270 and FR3038; F-76821 Mont Saint Aignan France
| | - Christophe Rihouey
- Normandie Université; Caen France
- Laboratoire Polymères Biopolymères Surfaces; Université de Rouen; F-76821 Mont Saint Aignan France
- CNRS UMR 6270 and FR3038; F-76821 Mont Saint Aignan France
| | - Luc Picton
- Normandie Université; Caen France
- Laboratoire Polymères Biopolymères Surfaces; Université de Rouen; F-76821 Mont Saint Aignan France
- CNRS UMR 6270 and FR3038; F-76821 Mont Saint Aignan France
| | - Didier Le Cerf
- Normandie Université; Caen France
- Laboratoire Polymères Biopolymères Surfaces; Université de Rouen; F-76821 Mont Saint Aignan France
- CNRS UMR 6270 and FR3038; F-76821 Mont Saint Aignan France
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The role of Klebsiella in Crohn's disease with a potential for the use of antimicrobial measures. Int J Rheumatol 2013; 2013:610393. [PMID: 24223596 PMCID: PMC3810322 DOI: 10.1155/2013/610393] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Accepted: 09/04/2013] [Indexed: 12/23/2022] Open
Abstract
There is a general consensus that Crohn's disease (CD) develops as the result of immune-mediated tissue damage triggered by infections with intestinal microbial agents. Based on the results of existing microbiological, molecular, and immunological studies, Klebsiella microbe seems to have a key role in the initiation and perpetuation of the pathological damage involving the gut and joint tissues in patients with CD. Six different gastroenterology centres in the UK have reported elevated levels of antibodies to Klebsiella in CD patients. There is a relationship between high intake of starch-containing diet, enhanced growth of gut microbes, and the production of pullulanases by Klebsiella. It is proposed that eradication of these microbes by the use of antibiotics and low starch diet, in addition to the currently used treatment, could help in alleviating or halting the disease process in CD.
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Ali G, Rihouey C, Larreta-Garde V, Le Cerf D, Picton L. Molecular Size Characterization and Kinetics Studies on Hydrolysis of Pullulan by Pullulanase in an Entangled Alginate Medium. Biomacromolecules 2013; 14:2234-41. [DOI: 10.1021/bm400371r] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Ghina Ali
- Normandie Université, France
- Université de Rouen, Laboratoire Polymères Biopolymères
Surfaces, F-76821 Mont Saint Aignan, France
- CNRS UMR 6270 and FR3038, F-76821 Mont Saint Aignan, France
| | - Christophe Rihouey
- Normandie Université, France
- Université de Rouen, Laboratoire Polymères Biopolymères
Surfaces, F-76821 Mont Saint Aignan, France
- CNRS UMR 6270 and FR3038, F-76821 Mont Saint Aignan, France
| | | | - Didier Le Cerf
- Normandie Université, France
- Université de Rouen, Laboratoire Polymères Biopolymères
Surfaces, F-76821 Mont Saint Aignan, France
- CNRS UMR 6270 and FR3038, F-76821 Mont Saint Aignan, France
| | - Luc Picton
- Normandie Université, France
- Université de Rouen, Laboratoire Polymères Biopolymères
Surfaces, F-76821 Mont Saint Aignan, France
- CNRS UMR 6270 and FR3038, F-76821 Mont Saint Aignan, France
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