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El-Malek FA, Steinbüchel A. Post-Synthetic Enzymatic and Chemical Modifications for Novel Sustainable Polyesters. Front Bioeng Biotechnol 2022; 9:817023. [PMID: 35071219 PMCID: PMC8766639 DOI: 10.3389/fbioe.2021.817023] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 12/20/2021] [Indexed: 11/13/2022] Open
Abstract
Because of their biodegradability, compostability, compatibility and flexible structures, biodegradable polymers such as polyhydroxyalkanoates (PHA) are an important class of biopolymers with various industrial and biological uses. PHAs are thermoplastic polyesters with a limited processability due to their low heat resistance. Furthermore, due to their high crystallinity, some PHAs are stiff and brittle. These features result sometimes in very poor mechanical characteristics with low extension at break values which limit the application range of some natural PHAs. Several in vivo approaches for PHA copolymer modifications range from polymer production to enhance PHA-based material performance after synthesis. The methods for enzymatic and chemical polymer modifications are aiming at modifying the structures of the polyesters and thereby their characteristics while retaining the biodegradability. This survey illustrates the efficient use of enzymes and chemicals in post-synthetic PHA modifications, offering insights on these green techniques for modifying and improving polymer performance. Important studies in this sector will be reviewed, as well as chances and obstacles for their stability and hyper-production.
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Affiliation(s)
- Fady Abd El-Malek
- International Center for Research on Innovative Biobased Materials (ICRI-BioM)-International Research Agenda, Lodz University of Technology, Lodz, Poland
| | - Alexander Steinbüchel
- International Center for Research on Innovative Biobased Materials (ICRI-BioM)-International Research Agenda, Lodz University of Technology, Lodz, Poland
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Hydrogel Nanoparticle as a Functional Coating Layer in Biosensing, Tissue Engineering, and Drug Delivery. COATINGS 2020. [DOI: 10.3390/coatings10070663] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The development of functional coating materials has resulted in many breakthroughs in the discovery of energy, environmental, and biomedical applications. Responsive polymeric hydrogels are an example of smart coating materials due to their stimuli-responsive characteristics upon changes in their local environment. This review focuses on the introduction of hydrogel nanoparticles and their applications in functional layers as responsive coating materials. Hydrogels are explained by the composition of cross-links and monomers used for preparation. In particular, an important class of responsive hydrogels, that is, nanosized hydrogel particles (nanogels), are described for thee synthesis, modification, and application in assembly of functional coating layers. Finally, nanogel functional layers for biological applications will be discussed with recent advances in biosensing, tissue engineering, and drug delivery.
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Dulęba J, Siódmiak T, Marszałł MP. Amano Lipase PS from Burkholderia cepacia- Evaluation of the Effect of Substrates and Reaction Media on the Catalytic Activity. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824666200408092305] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
:
Lipases in the native or immobilized form have commonly been used as catalysts
in the chemical and pharmaceutical industry. One of the widely available enzyme
catalysts on the market is lipase from Burkholderia cepacia (BCLs), previously called
Pseudomonas cepacia (PCLs). This enzyme is applied, among others, in the stereoselective
acylation of molecules to achieve chiral pure enantiomers of drugs or their building
blocks. In this study, Amano lipase PS (APS-BCL), which is a commercial lipase from
Burkholderia cepacia (BC) was tested. The lipolytic activity of APS-BCL by hydrolysis
of vegetable oils and enantioselective activity of APS-BCL by the kinetic resolution of
(R,S)-1-phenylethanol with using isopropenyl acetate as an acyl donor were evaluated. An
effect of reaction media with different logP values (t-butyl methyl ether, dichloromethane,
diisopropyl ether, toluene, cyclohexane, n-hexane, isooctane and n-heptane) on the enantioselective activity of
lipase was also studied. The high value of the enantiomeric ratio (E =308.5) with the utilization of isopropenyl
acetate was achieved. Whereas, the best reaction medium turned out to be diisopropyl ether, C =47.9%, eep
=98%, ees =90%, after 24 h of incubation. Moreover, the influence of ω6/ω9 polyunsaturated fatty acids (PUFAs)
ratio in commercial (peanut, camelina, rape, pumpkin seed, walnut, sesame, avocado, rice, corn, black
cumin, hemp, safflower, grape seed) oils was investigated for the lipase activity. For the first time, the cut-off
limit of ω6/ω9 ratio was proposed. The ratio equal to or higher than 2.3 allows achieving higher lipolytic activity.
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Affiliation(s)
- Jacek Dulęba
- Department of Medicinal Chemistry, Collegium Medicum in Bydgoszcz, Faculty of Pharmacy, Nicolaus Copernicus University in Torun, Dr. A. Jurasza 2, 85-089 Bydgoszcz, Poland
| | - Tomasz Siódmiak
- Department of Medicinal Chemistry, Collegium Medicum in Bydgoszcz, Faculty of Pharmacy, Nicolaus Copernicus University in Torun, Dr. A. Jurasza 2, 85-089 Bydgoszcz, Poland
| | - Michał Piotr Marszałł
- Department of Medicinal Chemistry, Collegium Medicum in Bydgoszcz, Faculty of Pharmacy, Nicolaus Copernicus University in Torun, Dr. A. Jurasza 2, 85-089 Bydgoszcz, Poland
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Abstract
Enzymatic polymerization is an environmentally benign process for the synthesis of biodegradable and biocompatible polymers. The regioselectivity of lipase B from Candida Antarctica (CAL-B) produces linear functional polyesters without protection-deprotection steps. In this work, two different methods for the enzymatic synthesis of functional polyesters based on renewable resources, as, e.g., glycerol, using CAL-B are outlined. Poly(glycerol adipate) was synthesized by enzymatic transesterification between glycerol and divinyl adipate or dimethyl adipate. Methods are also reported to graft poly(glycerol adipate) with different amounts of hydrophobic side chains (lauric, stearic, behenic, and oleic acids) and hydrophilic poly(ethylene glycol) side chains, respectively. The hydrophilicity or lipophilicity of grafted polyesters is well controlled by changing the degree of grafting of hydrophilic and hydrophobic side chains. The multiple grafted polyesters are characterized by NMR spectroscopy, differential scanning calorimetry, gel permeation chromatography, and X-ray diffraction. Furthermore, the self-assembly of the graft copolymers in water and their use as steric stabilizers for cubosomes are discussed. For this purpose mainly dynamic light scattering and small angle X-ray scattering have been employed.
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Burek M, Wandzik I. Synthetic Hydrogels with Covalently Incorporated Saccharides Studied for Biomedical Applications – 15 Year Overview. POLYM REV 2018. [DOI: 10.1080/15583724.2018.1443122] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Małgorzata Burek
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, B. Krzywoustego, Gliwice, Poland
- Biotechnology Center, Silesian University of Technology, B. Krzywoustego, Gliwice, Poland
| | - Ilona Wandzik
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, B. Krzywoustego, Gliwice, Poland
- Biotechnology Center, Silesian University of Technology, B. Krzywoustego, Gliwice, Poland
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Sánchez DA, Tonetto GM, Ferreira ML. Burkholderia cepacia
lipase: A versatile catalyst in synthesis reactions. Biotechnol Bioeng 2017; 115:6-24. [DOI: 10.1002/bit.26458] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 07/14/2017] [Accepted: 09/21/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Daniel A. Sánchez
- Planta Piloto de Ingeniería Química (PLAPIQUI), Universidad Nacional del Sur; CONICET; Bahía Blanca Argentina
| | - Gabriela M. Tonetto
- Planta Piloto de Ingeniería Química (PLAPIQUI), Universidad Nacional del Sur; CONICET; Bahía Blanca Argentina
| | - María L. Ferreira
- Planta Piloto de Ingeniería Química (PLAPIQUI), Universidad Nacional del Sur; CONICET; Bahía Blanca Argentina
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de Menezes RNL, Camilo APR, Felisberti MI. Thermoresponsive hydrogels based on sucrose 1-O′-methacrylate andN-isopropylacrylamide: Synthesis, properties, and applications. J Appl Polym Sci 2017. [DOI: 10.1002/app.45495] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Sarvari R, Akbari-Alanjaraghi M, Massoumi B, Beygi-Khosrowshahi Y, Agbolaghi S. Conductive and biodegradable scaffolds based on a five-arm and functionalized star-like polyaniline–polycaprolactone copolymer with a d-glucose core. NEW J CHEM 2017. [DOI: 10.1039/c7nj01063j] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The scaffolds demonstrated a porous structure with a large surface area and electrical conductivity, imitating the ECM to regulate cell attachment, proliferation, and differentiation.
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Affiliation(s)
- Raana Sarvari
- Department of Chemistry
- Payame Noor University
- Tehran
- Iran
| | | | | | | | - Samira Agbolaghi
- Institute of Polymeric Materials
- Sahand University of Technology
- Tabriz
- Iran
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Ayres BT, Valença GP, Franco TT, Adlercreutz P. Two-step process for preparation of oligosaccharide propionates and acrylates using lipase and Cyclodextrin Glycosyl Transferase (CGTase). ACTA ACUST UNITED AC 2014. [DOI: 10.1186/2043-7129-2-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Abstract
Background
Oligosaccharide esters are attractive candidates for applications as surfactants, hydrogels and other materials, but direct enzymatic acylation is difficult with carbohydrates longer than disaccharides.
Results
A combination of one lipase-catalyzed step and one transglycosylation step catalyzed by a cyclodextrin glycosyl transferase (CGTase) was used to synthesize oligosaccharide esters. The conversion of glucose and maltose with vinyl propionate catalyzed by Candida antarctica lipase B (Novozym 435) in dioxane proceeded to full conversion to mixtures of mono and diesters. When ethyl acrylate was used as acyl donor, mono and diesters were formed, but full conversion was not reached. The CGTase catalyzed reactions between the glucose and maltose esters and α-cyclodextrin were carried out in water. In the initial phase, addition of the glucose residues of the cyclodextrin to the ester substrate occurred (coupling reaction), followed by disproportionation reactions yielding a range of oligosaccharide esters with varying chain length. The monoesters were efficient acceptors in the CGTase-catalyzed reactions, while the diesters were not converted to a significant extent. As a consequence, the glucose propionate which contained large amounts of diesters was converted to 40% conversion while the maltose propionate which contained mainly monoesters was converted to 86% conversion.
Conclusions
A two-step enzymatic process for preparation of oligosaccharide esters has been developed. Oligosaccharide propionates were produced in high yield with a total reaction time of 5 h. The double bond of the acrylate moiety reduced the reaction rate of the lipase catalyzed transesterification, but in both cases, the CGTase efficiently converted the monoesters to oligosaccharide esters.
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Chatterjee S, Sharma A, Chattopadhyay S. Chemoenzymatic synthesis of the macrolide antibiotic (−)-A26771B. RSC Adv 2014. [DOI: 10.1039/c4ra05399k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The macrolide antibiotic (−)-A26771B is synthesized using lipase catalyzed reactions as the key steps.
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Affiliation(s)
| | - Anubha Sharma
- Bio-Organic Division
- Bhabha Atomic Research Centre
- Mumbai 400 085, India
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12
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Ajish JK, Ajish Kumar KS, Subramanian M, Kumar M. d-Glucose based bisacrylamide crosslinker: synthesis and study of homogeneous biocompatible glycopolymeric hydrogels. RSC Adv 2014. [DOI: 10.1039/c4ra09481f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The ability of sugar pendants in glycopolymeric hydrogels to mimic that on the cell surface can be used as a reliable method for the site specific delivery of drugs.
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Affiliation(s)
- Juby K. Ajish
- Radiation and Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400085, India
| | - K. S. Ajish Kumar
- Bio-Organic Division
- Bhabha Atomic Research Centre
- Mumbai 400085, India
| | | | - Manmohan Kumar
- Radiation and Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400085, India
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Gumel A, Annuar M, Heidelberg T. Enzymatic synthesis of 6-O-glucosyl-poly(3-hydroxyalkanoate) in organic solvents and their binary mixture. Int J Biol Macromol 2013; 55:127-36. [DOI: 10.1016/j.ijbiomac.2012.12.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Revised: 11/28/2012] [Accepted: 12/16/2012] [Indexed: 10/27/2022]
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14
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Nabid MR, Shamsianpour M, Sedghi R, Moghaddam AB. Enzyme-Catalyzed Synthesis of Conducting Polyaniline Nanocomposites with Pure and Functionalized Carbon Nanotubes. Chem Eng Technol 2012. [DOI: 10.1002/ceat.201100149] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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15
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Biocatalytic synthesis of new copolymers from 3-hydroxybutyric acid and a carbohydrate lactone. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcatb.2011.03.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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16
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Rethwisch DG, Chen X, Martin BD, Dordick JS. Chemoenzymatic Preparation of Sugar-Based Hydrogels. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-330-225] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTWe have prepared sugar-based hydrogels using a chemoenzymatic synthetic approach. Specifically, the regioselectivity of enzymes was used to prepare sugar acrylate monomers. These monomers were polymerized with a crosslinker in a standard free radical polymerization. The polymers consist of a polyacrylate backbone with sucrose, (α-methyl glucoside, or β-methyl galactoside pendant groups. These materials are highly water absorbent swelling to more than 100 times their initial weight when placed in water. The degree of swelling for poly(β-methyl galactoside 6-acrylate) hydrogel was relatively insensitive to pH (from pH 4.5-9) and ionic strength (0.15-3 M NaCl). Potential applications of these materials include waterabsorbents and drug delivery systems.
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17
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Popescu D, Keul H, Moeller M. Poly(meth)acrylates Obtained by Cascade Reaction. Macromol Rapid Commun 2011; 32:559-72. [DOI: 10.1002/marc.201000725] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Revised: 12/22/2010] [Indexed: 01/21/2023]
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18
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Mahkam M, Poorgholy N, Vakhshouri L. Synthesis and characterization of novel ph-sensitive hydrogels containing ibuprofen pendents for colon-specific drug delivery. Macromol Res 2009. [DOI: 10.1007/bf03218932] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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19
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Singh PP, Qazi NA, Shafi S, Reddy DM, Banday AH, Reddy PB, Suri K, Gupta B, Satti N, Wakhloo BP, Kumar HS, Qazi G. Regio-selective acylation of biologically important iridoid glycosides by Candida antarctica lipase. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcatb.2008.04.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Martin BD, Soto CM, Taitt C, Charles PT. Internal transport properties of macroporous sugar polyacrylate hydrogels: Microsphere diffusion described by phenomenological laws. Biotechnol Bioeng 2008; 99:1241-9. [DOI: 10.1002/bit.21646] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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21
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Roger P, Gérard S, Burckbuchler V, Renaudie L, Judeinstein P. Effect of the incorporation of a low amount of carbohydrate-containing monomer on the swelling properties of polyacrylamide hydrogels. POLYMER 2007. [DOI: 10.1016/j.polymer.2007.10.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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GANDHI NEENAN, PATIL NITINS, SAWANT SUDHIRPRAKASHB, JOSHI JYESHTHARAJB, WANGIKAR PRAMODP, MUKESH D. Lipase-Catalyzed Esterification. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2007. [DOI: 10.1081/cr-100101953] [Citation(s) in RCA: 137] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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24
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Ma Q, Feng S. Synthesis of a new kind of carbohydrate-modified polysiloxanes and its morphological transition of molecular aggregates in water. Carbohydr Polym 2006. [DOI: 10.1016/j.carbpol.2006.01.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Soto CM, Patterson CH, Charles PT, Martin BD, Spector MS. Immobilization and hybridization of DNA in a sugar polyacrylate hydrogel. Biotechnol Bioeng 2006; 92:934-42. [PMID: 16155955 DOI: 10.1002/bit.20665] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Using a non-contact microarrayer, amine-terminated probe oligonucleotides representing 20-, 50-, and 70-mer fragments of the fliC gene were covalently coupled into three-dimensional regions in a "sugar polyacrylate" hydrogel based on poly(6-acryloyl-beta-O-methyl galactopyranoside-co-aminopropyl methacrylamide). The arrayer deposited the solution containing ssDNA probes in discrete regions on the surface of the gel (i.e. as a droplet with a ca. 450 microm diameter), allowing penetration and attachment of the ss DNA within the three dimensional region of the gel. The attachment was mediated by the homobifunctional crosslinker bis-succinimidyl suberate. Confocal microscopy showed the density of attached probe DNA was greatest in the interior-most regions of the gel volume. Target ssDNA (20- and 70-mer) was able to diffuse through the gel and undergo successful hybridization with the probes. For target ssDNA in the concentration range 0.19 microM to 6.0 microM, there was a linear correlation between DNA concentration and the fluorescence of the gel region where hybridization occurred.
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Affiliation(s)
- Carissa M Soto
- Naval Research Laboratory, Center for Bio/Molecular Science and Engineering, 4555 Overlook Ave. SW, Washington, DC 20375, USA.
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Gädda T, Kylmä J, Tuominen J, Mikkonen H, Laine A, Peltonen S, Seppälä J. Poly(ɛ-caprolactone)-grafted acetylated anhydroglucose oligomer by ring-opening polymerization—Synthesis and characterization. J Appl Polym Sci 2006. [DOI: 10.1002/app.23697] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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27
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Dong J, Chen L, Ding Y, Han W. Swelling and Mechanical Properties of a Temperature-Sensitive Dextran Hydrogel and its Bioseparation Applications. MACROMOL CHEM PHYS 2005. [DOI: 10.1002/macp.200500125] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Namazi H, Sharifzadeh R. Regioselective synthesis of vinylic derivatives of common monosccarides through their activated stannylene acetal intermediates. Molecules 2005; 10:772-82. [PMID: 18007346 PMCID: PMC6147606 DOI: 10.3390/10070772] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2004] [Revised: 11/04/2004] [Accepted: 11/06/2004] [Indexed: 11/26/2022] Open
Abstract
The regioselective C-2-O-acrylation and metacrylation of methyl 4,6-O-benzylidene-α-D-glucopyranoside and methyl 4,6-O-benzylidene-α-D-galactopyranoside through their corresponding organotin intermediates have been studied. Regioselectivity was achived through the formation of a tin chelate of the 2,3-diols. Thus, methyl 4,6-O-benzylidene-α-D-glucopyranoside and methyl 4,6-O-benzylidene-α-D-galactopyranoside were reacted with dibutylstannylene to give the corresponding dibutylstannylene acetal intermediates that were then reacted in a regioselective manner with acryloyl chloride or metacryloyl chloride in the presence of triethylamine (TEA) or pyridine to give the vinylic type monomeric compounds. The monomeric products containing glucose and galactose units from each reaction were separated by column chromatography using a gradient of n-hexane and ethyl acetate as eluant. The structure of the obtained compounds were confirmed using 1H-, 13C- and 2D NMR spectroscopy.
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Affiliation(s)
- H Namazi
- Lab of Dendrimers and Biopolymers, Faculty of Chemistry, University of Tabriz, Iran.
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29
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Esterification of streptol — a cyclitol derivative — by Candida rugosa lipase: influence of the acyl donor on regioselectivity. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.molcatb.2004.12.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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30
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Liu J, Chen L, Li L, Hu X, Cai Y. Steady-state fluorescence study on release of camptothecin from agar hydrogel. Int J Pharm 2005; 287:13-9. [PMID: 15541907 DOI: 10.1016/j.ijpharm.2004.08.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2004] [Revised: 08/12/2004] [Accepted: 08/14/2004] [Indexed: 11/28/2022]
Abstract
The slow drug release processes from agar hydrogel were studied by steady-state fluorescence (SSF) measurement. An anticancer drug, camptothecin (CPT), was used as the release drug and the fluorescence probe for the real-time monitoring of the release processes by measuring the fluorescence intensity of the probe. The release kinetics of CPT at different temperatures was investigated. The Fickian diffusion model was adopted to fit the results and a good linear relationship could be observed between the logarithmic release fraction and the releasing time. The diffusion coefficients (D) at these conditions were thus obtained from the slopes of the fitting curves. By plotting D against temperature, the diffusion coefficient of CPT was found to obey the Arrhenius relation and the activation energy was then obtained to be 70.6 kJ mol(-1).
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Affiliation(s)
- J Liu
- School of Mechanical & Production Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
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31
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Nabid MR, Entezami AA. Comparative study on the enzymatic polymerization of N-substituted aniline derivatives. POLYM ADVAN TECHNOL 2005. [DOI: 10.1002/pat.582] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abstract
Enzyme catalyzed esterification reactions have found many applications, ranging from the modification of vegetable oils for human consumption to the production of optically pure chemicals. To displace the equilibrium in favor of synthesis, rather than hydrolysis, these reactions are performed in non-aqueous or microaqueous media. The influence of the amount of water, and of the nature of organic solvent, are new parameters to consider in the optimization of industrial processes. They also add a new perspective to our knowledge of the functioning of enzymes.
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Affiliation(s)
- R Lortie
- Bioprocess Research and Development, Biotechnology Research Institute, National Research Council of Canada, 6100 Royalmount Avenue, Montréal, Québec, H4P 2R2, Canada
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34
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Synthesis of (+)-goniothalamin and its enantiomer by combination of lipase catalyzed resolution and alkene metathesis. Tetrahedron 2004. [DOI: 10.1016/j.tet.2003.10.102] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Sroga GE, Dordick JS. Periplasmic Expression as a Basis for Whole Cell Kinetic Screening of Unnatural Enzyme Reactivities. Methods Enzymol 2004; 388:145-56. [PMID: 15289068 DOI: 10.1016/s0076-6879(04)88013-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Affiliation(s)
- Grazyna E Sroga
- Chemical and Biological Engineering Department, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
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Kumar A, Kulshrestha AS, Gao W, Gross RA. Versatile Route to Polyol Polyesters by Lipase Catalysis. Macromolecules 2003. [DOI: 10.1021/ma0351827] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ajay Kumar
- NSF Center for Biocatalysis and Bioprocessing of Macromolecules, Department of Chemistry and Chemical Engineering, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201
| | - Ankur S. Kulshrestha
- NSF Center for Biocatalysis and Bioprocessing of Macromolecules, Department of Chemistry and Chemical Engineering, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201
| | - Wei Gao
- NSF Center for Biocatalysis and Bioprocessing of Macromolecules, Department of Chemistry and Chemical Engineering, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201
| | - Richard A. Gross
- NSF Center for Biocatalysis and Bioprocessing of Macromolecules, Department of Chemistry and Chemical Engineering, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201
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Teramoto N, Shibata M. Trehalose-based thermosetting resins. I. Synthesis and thermal properties of trehalose vinylbenzyl ether. J Appl Polym Sci 2003. [DOI: 10.1002/app.13167] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Synthesis, characterisation and evaluation of poly[lactose acrylate-N-vinyl-2-pyrrolidinone] hydrogels for drug delivery. Eur Polym J 2003. [DOI: 10.1016/s0014-3057(02)00184-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Abstract
Technological advances in miniaturization have found a niche in biology and signal the beginning of a new revolution. Most of the attention and advances have been made with DNA chips yet a lot of progress is being made in the use of other biomolecules and cells. A variety of reviews have covered only different aspects and technologies but leading to the shared terminology of "biochips." This review provides a basic introduction and an in-depth survey of the different technologies and applications involving the use of non-DNA molecules such as proteins and cells. The review focuses on microarrays and microfluidics, but also describes some cellular systems (studies involving patterning and sensor chips) and nanotechnology. The principles of each technology including parameters involved in biochip design and operation are outlined. A discussion of the different biological and biomedical applications illustrates the significance of biochips in biotechnology.
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Affiliation(s)
- Jocelyn H Ng
- IMI Consulting GmbH, Auf dem Amtshof 3, 30938 Burgwedel, Germany.
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Hari Krishna S, Karanth NG. LIPASES AND LIPASE-CATALYZED ESTERIFICATION REACTIONS IN NONAQUEOUS MEDIA. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2002. [DOI: 10.1081/cr-120015481] [Citation(s) in RCA: 178] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kumar R, Gross RA. Biocatalytic route to well-defined macromers built around a sugar core. J Am Chem Soc 2002; 124:1850-1. [PMID: 11866587 DOI: 10.1021/ja012262m] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
By using 4-C-hydroxymethyl-alpha-D-pentofuranose as the sugar core and lipase-catalyzed transformations, a macromer was constructed with exceptional control of substituent placement around the carbohydrate core. The key synthetic transformations performed were as follows: (1) selective lipase-catalyzed acrylation along with prochiral selection of 4-C-hydroxymethyl-1,2-O-isopropylidene-alpha-D-pentofuranose (diastereomeric excess up to 93%); (2) the ring-opening of epsilon-caprolactone, epsilon-CL, from the remaining primary hydroxyl group to give an acryl-sugar capped macromer (M(n) = 11 300, M(w)/M(n) = 1.36, initiator efficiency 50-55%, <5% water initiated PCL chains); (3) selective lipase-catalyzed esterification of the terminal hydroxyl of oligo(epsilon-CL) chains; (4) hydrolysis of the 1,2-O-isopropylidene group at the sugar core without any substantial loss in macromer molecular weight; and (5) homopolymerization of the corresponding macromer. In principle, the method developed is flexible so that it can be used to generate a wide array of unusual macromers and heteroarm stars. In the absence of biocatalytic transformation, such structural control would be extremely difficult or currently impossible to obtain.
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Affiliation(s)
- Rajesh Kumar
- NSF Center for Biocatalysis and Bioprocessing of Macromolecules, Department of Chemistry and Chemical Engineering, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201, USA
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Aqueous vinyl-insertion polymerization of lactamine-functionalized norbornene by palladium (II) chloride. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)00098-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Litthauer D, Ginster A, van Eeden Skein E. Pseudomonas luteola lipase: a new member of the 320-residue Pseudomonas lipase family. Enzyme Microb Technol 2002. [DOI: 10.1016/s0141-0229(01)00469-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
A combinatorial strategy for biocatalytic polymer synthesis is demonstrated. A library of polymers was synthesized in 96 deep-well plates using AA-BB polycondensations of acyl donors and acceptors. The library was based on four straight-chain diesters as acyl donors (C(3)-C(10)) with aliphatic/aromatic diols as well as more diverse structures including carbohydrates, nucleic acids, and a natural steroid diol used as acyl acceptors. The lipase from Candida antarctica was active in acetonitrile and was capable of catalyzing the polycondensation of the aforementioned monomers to polymers with M(w)'s reaching as high as 20,000 Da, including the preparation of novel sugar-containing polyesters. The combinatorial approach to biocatalytic polymer synthesis described herein serves as a foundation for polymeric materials discovery by demonstrating that polymer arrays can be produced from structurally complex monomers.
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Affiliation(s)
- D Y Kim
- Department of Chemical Engineering, Rensselaer Polytechnic Institute, 102 Ricketts Bldg., Troy, NY 12180, USA
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Affiliation(s)
- R A Gross
- NSF IUCRC for Biocatalysis and BioProcessing of Macromolecules, Department of Chemistry and Chemical Engineering, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201, USA.
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Xie J, Hsieh YL. Enzyme-catalyzed transesterification of vinyl esters on cellulose solids. ACTA ACUST UNITED AC 2001. [DOI: 10.1002/pola.1170] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Bisht KS, Gao W, Gross RA. Glycolipids from Candida bombicola: Polymerization of a 6-O-Acryloyl Sophorolipid Derivative. Macromolecules 2000. [DOI: 10.1021/ma0001537] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kirpal S. Bisht
- Polytechnic University, NSF Center for Biocatalysis and Bioengineering, Six Metrotech Center, Brooklyn, New York 11201
| | - Wei Gao
- Polytechnic University, NSF Center for Biocatalysis and Bioengineering, Six Metrotech Center, Brooklyn, New York 11201
| | - Richard A. Gross
- Polytechnic University, NSF Center for Biocatalysis and Bioengineering, Six Metrotech Center, Brooklyn, New York 11201
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