Candida antarctica lipase B chemically immobilized on epoxy-activated micro- and nanobeads: catalysts for polyester synthesis.

Abstract:

:Candida antarctica Lipase B (CALB) was covalently immobilized onto epoxy-activated macroporous poly(methyl methacrylate) Amberzyme beads (235 microm particle size, 220 A pore size) and nanoparticles (nanoPSG, diameter 68 nm) with a poly(glycidyl methacrylate) outer region. Amberzyme beads allowed CALB loading up to 0.16 g of enzyme per gram of support. IR microspectroscopy generated images of Amberzyme-CALB beads showed CALB is localized within a 50 microm thick loading front. IR microspectroscopy images, recorded prior to and after treatment of Amberzyme-CALB with DMSO/aqueous Triton X-100, are similar, confirming that CALB is largely chemically linked to Amberzyme. The activity of CALB immobilized on Amberzyme, Lewatit (i.e., Novozym 435 catalyst), and nanoPSG was assessed for lactone ring-opening and step-condensation polymerizations. For example, the percent conversion of -caprolactone using the same amount of enzyme catalyzed by Amberzym-CALB, Novozym 435, and nanoPSG-CALB for 20 min was 7.0, 16, and 65%, respectively. Differences in CALB reactivity were discussed based on resin physical parameters and availability of active sites determined by active site titrations. Regardless of the matrix used and chemical versus physical immobilization, -CL ring-opening polymerizations occur by a chain growth mechanism without chain termination. To test Amberzyme-CALB stability, the catalyst was reused over three reaction cycles for -CL ring-opening polymerization (70 degrees C, 70 min reactions) and glycerol/1,8-octanediol/adipic acid polycondensation reactions (90 degrees C, 64 h). Amberzyme-CALB was found to have far better stability for reuse relative to Novozym 435 for the polycondensation reaction.

journal_name

Biomacromolecules

journal_title

Biomacromolecules

authors

Chen B,Hu J,Miller EM,Xie W,Cai M,Gross RA

doi

10.1021/bm700949x

subject

Has Abstract

pub_date

2008-02-01 00:00:00

pages

463-71

issue

2

eissn

1525-7797

issn

1526-4602

journal_volume

9

pub_type

杂志文章
  • Electrospinning Nanofibers from Chitosan/Hyaluronic Acid Complex Coacervates.

    abstract::Electrospun biopolyelectrolyte nanofibers hold potential for use in a range of biomedical applications, but eliminating toxic chemicals involved in their production remains a key challenge. In this study, we successfully electrospun nanofibers from an aqueous complex coacervate solution composed of chitosan and hyalur...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/acs.biomac.9b01072

    authors: Sun J,Perry SL,Schiffman JD

    更新日期:2019-11-11 00:00:00

  • Biodegradable hydrogels for time-controlled release of tethered peptides or proteins.

    abstract::Tethering drug substances to a gel network is an effective way of controlling the release kinetics of hydrogel-based drug delivery systems. Here, we report on in situ forming, biodegradable hydrogels that allow for the covalent attachment of peptides or proteins. Hydrogels were prepared by step-growth polymerization o...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm901235g

    authors: Brandl F,Hammer N,Blunk T,Tessmar J,Goepferich A

    更新日期:2010-02-08 00:00:00

  • Phenomenological Changes in Lignin Following Polymerization and Its Effects on Flocculating Clay Particles.

    abstract::Cationic kraft lignin (CKL) macromolecules were produced via polymerizing kraft lignin (KL) with [2-(acryloyloxy)ethyl]trimethylammonium chloride (ATAC) or [2-(methacryloyloxy)ethyl]trimethylammonium methyl sulfate (METAM). Despite slightly different charge densities (2.3-2.5 mmol/g) of CKL, lignin-METAM (KL-METAM) ha...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/acs.biomac.9b01016

    authors: Sabaghi S,Fatehi P

    更新日期:2019-10-14 00:00:00

  • Hydrogel-Based Bioinks for Cell Electrowriting of Well-Organized Living Structures with Micrometer-Scale Resolution.

    abstract::Bioprinting has become an important tool for fabricating regenerative implants and in vitro cell culture platforms. However, until today, extrusion-based bioprinting processes are limited to resolutions of hundreds of micrometers, which hamper the reproduction of intrinsic functions and morphologies of living tissues....

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/acs.biomac.0c01577

    authors: Castilho M,Levato R,Bernal PN,de Ruijter M,Sheng CY,van Duijn J,Piluso S,Ito K,Malda J

    更新日期:2021-01-07 00:00:00

  • Tumor Microenvironmental pH and Enzyme Dual Responsive Polymer-Liposomes for Synergistic Treatment of Cancer Immuno-Chemotherapy.

    abstract::Despite recent advances in tumor treatment through cancer immunotherapy, the efficacy of this approach remains to be improved. Looking forward to high rates of objective clinical response, cancer immunotherapy combined with chemotherapy has gained increasing attention recently. Here, we constructed liposomes with matr...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/acs.biomac.8b01510

    authors: Liu Y,Chen XG,Yang PP,Qiao ZY,Wang H

    更新日期:2019-02-11 00:00:00

  • Effect of Ionic Functional Groups on the Oxidation State and Interfacial Binding Property of Catechol-Based Adhesive.

    abstract::Adhesive hydrogels were prepared by copolymerizing dopamine methacrylamide with either acrylic acid (AAc) or N-(3-aminopropyl)methacrylamide hydrochloride (APMH). The effect of incorporating the anionic and cationic side chains on the oxidation state of catechol was characterized using the FOX assay to track the produ...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/acs.biomac.7b01311

    authors: Narkar AR,Kelley JD,Pinnaratip R,Lee BP

    更新日期:2018-05-14 00:00:00

  • Pretreatment of amphiphilic comb polymer surfaces dramatically affects protein adsorption.

    abstract::New applications in regenerative biotechnology require the ability to understand and control protein-surface interactions on micrometer and submicrometer length scales. Evidence presented here shows that micropatterned amphiphilic comb polymer films exhibit a pretreatment-dependent behavior with respect to protein ads...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm050446d

    authors: Zhang Z,Ma H,Hausner DB,Chilkoti A,Beebe TP Jr

    更新日期:2005-11-01 00:00:00

  • Poly-l-glutamic acid derivatives as multifunctional vectors for gene delivery. Part A. Synthesis and physicochemical evaluation.

    abstract::This paper describes the synthesis and evaluation of a series of multifunctional poly-l-glutamic acid derivatives that can be used as vectors for gene delivery. They readily form polyelectrolyte complexes with DNA, resulting in a reduced surface charge and size of the DNA. The formation of a polymer-DNA complex and th...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm034014j

    authors: Dubruel P,Dekie L,Schacht E

    更新日期:2003-09-01 00:00:00

  • Modular elastic patches: mechanical and biological effects.

    abstract::A modular approach to engineering cross-linked elastic biomaterials is presented for fine-tuning of material mechanical and biological properties. The three components, soluble elastin, hyaluronic acid, and silk fibroin, contribute with different features to the overall properties of the final material system. The ela...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm1007772

    authors: Serban MA,Kluge JA,Laha MM,Kaplan DL

    更新日期:2010-09-13 00:00:00

  • In vitro studies of antifreeze glycoprotein (AFGP) and a C-linked AFGP analogue.

    abstract::Antifreeze glycoproteins (AFGPs) are a subclass of biological antifreezes found in deep sea Teleost fish. These compounds have the ability to depress the freezing point of the organism such that it can survive the subzero temperatures encountered in its environment. This physical property is very attractive for the cr...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm061044o

    authors: Liu S,Wang W,Moos Ev,Jackman J,Mealing G,Monette R,Ben RN

    更新日期:2007-05-01 00:00:00

  • Multifunctional Amyloid Oligomeric Nanoparticles for Specific Cell Targeting and Drug Delivery.

    abstract::Natural selection has endorsed proteins with amazing structures and functionalities that cannot be matched by synthetic means, explaining the exponential interest in developing protein-based materials. Protein self-assembly allows fabricating complex supramolecular structures from relatively simple building blocks, a ...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/acs.biomac.0c01103

    authors: Wang W,Azizyan RA,Garro A,Kajava AV,Ventura S

    更新日期:2020-10-12 00:00:00

  • Thermodynamic and dynamic characteristics of hydroxypropylmethylcellulose adsorbed films at the air-water interface.

    abstract::Surface pressure isotherms and structural and surface dilatational properties of three hydroxypropylmethycelluloses (HPMCs, called E4M, E50LV, and F4M) adsorbed films at the air-water interface were determined. In this work we present evidence that HPMC molecules are able to diffuse and saturate the air-water interfac...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm050757o

    authors: Pérez OE,Sánchez CC,Rodríguez Patino JM,Pilosof AM

    更新日期:2006-01-01 00:00:00

  • On-off switching of gene expression regulated with carbohydrate-lectin interaction.

    abstract::A novel strategy for artificial regulation system of gene expression applying the specific molecular recognition between carbohydrate and lectin is proposed. Plasmid-lactose conjugates (pActin-lactose and pGFP-lactose) prepared via diazocoupling maintained the transcription activity with T7 RNA polymerase. Gel-shift a...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm050255a

    authors: Matsuura K,Hayashi K,Kobayashi K

    更新日期:2005-09-01 00:00:00

  • Electrophoretic deposition of polymer chains: a Monte Carlo study of density profile and conformation.

    abstract::Effects of molecular weight (Lc) and field strength (E) on conformation of polymer chains and their density are investigated at the surface and bulk of a driven chain system in three dimensions with a Monte Carlo simulation. As the polymer chains deposit on the surface, a linear density gradient develops in low field....

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm000289c

    authors: Foo GM,Pandey RB

    更新日期:2000-10-01 00:00:00

  • Gas-in-liquid foam templating as a method for the production of highly porous scaffolds.

    abstract::In the present work, a novel synthetic methodology for the preparation of scaffold of biopolymeric nature is described. In particular, a porous gelatin scaffold was prepared by foam templating. The gas phase, nitrogen, was generated by means of the reaction between sulfamic acid and sodium nitrite in situ a concentrat...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm901051c

    authors: Barbetta A,Gumiero A,Pecci R,Bedini R,Dentini M

    更新日期:2009-12-14 00:00:00

  • Enhancement of Loading Efficiency by Coloading of Doxorubicin and Quercetin in Thermoresponsive Polymeric Micelles.

    abstract::Chemotherapy faces challenges, including poor aqueous solubility of the drugs, and cardiotoxicity. Micellar drug delivery systems (DDS) are used to encapsulate anticancer drugs for better therapeutic effects, however, with poor loading content. Herein, we synthesized a micellar DDS using γ-benzyloxy substituted poly(ε...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/acs.biomac.9b01742

    authors: Soltantabar P,Calubaquib EL,Mostafavi E,Biewer MC,Stefan MC

    更新日期:2020-04-13 00:00:00

  • Selective localization of multiwalled carbon nanotubes in poly(epsilon-caprolactone)/polylactide blend.

    abstract::Poly(epsilon-caprolactone)/polylactide blend (PCL/PLA) is an interesting biomaterial because PCL and PLA present good complementarity in their physical properties and biodegradability. However, the thermodynamic incompatibility between two component polymers restricts further applications of their blend. In this work,...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm801183f

    authors: Wu D,Zhang Y,Zhang M,Yu W

    更新日期:2009-02-09 00:00:00

  • Synthesis, characterization, and bioavailability of mannosylated shell cross-linked nanoparticles.

    abstract::Saccharide-functionalized shell cross-linked (SCK) polymer micelles designed as polyvalent nanoscaffolds for selective interactions with receptors on Gram negative bacteria were constructed from mixed micelles composed of poly(acrylic acid-b-methyl acrylate) and mannosylated poly(acrylic acid-b-methyl acrylate). The m...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm0344710

    authors: Joralemon MJ,Murthy KS,Remsen EE,Becker ML,Wooley KL

    更新日期:2004-05-01 00:00:00

  • Copolymerization of 2-carboxyisopropylacrylamide with N-isopropylacrylamide accelerates cell detachment from grafted surfaces by reducing temperature.

    abstract::Acrylic acid (AAc) has been utilized to introduce reactive carboxyl groups to a temperature-responsive polymer, poly(N-isopropylacrylamide) (PIPAAm). However, AAc introduction shifts the copolymer phase transition temperatures higher and dampens the steep homopolymer phase transition with increasing AAc content. We pr...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm025692t

    authors: Ebara M,Yamato M,Hirose M,Aoyagi T,Kikuchi A,Sakai K,Okano T

    更新日期:2003-03-01 00:00:00

  • Structure, morphology, and bioactivity of biocompatible systems derived from functionalized acrylic polymers based on 5-amino-2-naphthalene sulfonic acid.

    abstract::New therapeutic strategies for the treatment of neoplastic pathologies and, in particular, metastasis processes are based on the inhibitory effect of angiogenic processes. The present article deals with the design, preparation, and application of new "polymer drugs" with a clear inhibitory effect of the activation of ...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm100223d

    authors: García-Fernández L,Aguilar MR,Fernández MM,Lozano RM,Giménez G,Valverde S,San Román J

    更新日期:2010-07-12 00:00:00

  • Mutational analysis and allosteric effects in the HIV-1 capsid protein carboxyl-terminal dimerization domain.

    abstract::The carboxyl-terminal domain (CTD, residues 146-231) of the HIV-1 capsid (CA) protein plays an important role in the CA-CA dimerization and viral assembly of the human immunodeficiency virus type 1. Disrupting the native conformation of the CA is essential for blocking viral capsid formation and viral replication. Thu...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm801151r

    authors: Yu X,Wang Q,Yang JC,Buch I,Tsai CJ,Ma B,Cheng SZ,Nussinov R,Zheng J

    更新日期:2009-02-09 00:00:00

  • Production of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) by metabolically engineered Escherichia coli strains.

    abstract::Recombinant Escherichia coli strains harboring a plasmid containing a novel artificial polyhydroxyalkanoate (PHA) operon consisting of the Aeromonas PHA biosynthesis related genes and Ralstonia eutropha reductase gene were developed for the production of poly(3-hydroxybutyrate-co-hydroxyhexanoate) [P(3HB-co-3HHx)] fro...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm000105u

    authors: Park SJ,Ahn WS,Green PR,Lee SY

    更新日期:2001-04-01 00:00:00

  • Biobased polymer system: miniemulsion of poly(alkyl methacrylate-graft-lactic acid)s.

    abstract::To broaden the application scope of lactic acid polymers, a new miniemulsion of poly(alkyl methacrylate-graft-lactic acid)s has been developed. The graft copolymer synthesis was based on a poly(lactic acid) macromonomer having a methacryloyl polymerizable group. The macromonomer and a comonomer of n-butyl methacrylate...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm9007937

    authors: Ishimoto K,Arimoto M,Ohara H,Kobayashi S,Ishii M,Morita K,Yamashita H,Yabuuchi N

    更新日期:2009-10-12 00:00:00

  • Synthesis, characterization, and antibacterial activities of novel methacrylate polymers containing norfloxacin.

    abstract::A novel methacrylate monomer containing a quinolone moiety was synthesized and homopolymerized in N,N-dimethylformamide (DMF) by using azobisisobutyronitrile (AIBN) as an initiator. The new monomer was copolymerized with poly(ethylene glycol) methyl ether methacrylate (MPEGMA) in DMF using the same initiator. The mono...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm049383+

    authors: Dizman B,Elasri MO,Mathias LJ

    更新日期:2005-01-01 00:00:00

  • Photobactericidal porphyrin-cellulose nanocrystals: synthesis, characterization, and antimicrobial properties.

    abstract::Adherence and survival of pathogenic bacteria on surfaces leading to concomitant transmission to new hosts significantly contributes to the proliferation of pathogens, which in turn considerably increases the threat to human health, particularly by antibiotic-resistant bacteria. Consequently, more research into effect...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm200718s

    authors: Feese E,Sadeghifar H,Gracz HS,Argyropoulos DS,Ghiladi RA

    更新日期:2011-10-10 00:00:00

  • Structure analysis of an amyloid-forming model peptide by a systematic glycine and proline scan.

    abstract::The ability to adopt at least two different stable conformations is a common feature of proteins involved in many neurodegenerative diseases. The involved molecules undergo a conformational transition from native, mainly helical states to insoluble amyloid structures that have high β-sheet content. A detailed characte...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm200587m

    authors: Gerling UI,Brandenburg E,von Berlepsch H,Pagel K,Koksch B

    更新日期:2011-08-08 00:00:00

  • Nonwoven Carboxylated Agarose-Based Fiber Meshes with Antimicrobial Properties.

    abstract::Hydrogel forming polysaccharides, such as the seaweed derived agarose, are well suited for wound dressing applications as they have excellent cell and soft tissue compatibility. For wound dressings, fibrous structure is desirable as the high surface area can favor adsorption of wound exudate and promote drug delivery....

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/acs.biomac.6b01401

    authors: Forget A,Arya N,Randriantsilefisoa R,Miessmer F,Buck M,Ahmadi V,Jonas D,Blencowe A,Shastri VP

    更新日期:2016-12-12 00:00:00

  • Complex formation of protein with different water-soluble synthetic polymers.

    abstract::The formation of protein-polymer complexes was studied in an aqueous system using dynamic light scattering (DLS) and static light scattering (SLS) as the main experimental tools. Human serum albumin (HSA) was used as a protein and complexed with four representative water-soluble polymers: poly(N-isopropylacrylamide) (...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm0341935

    authors: Matsudo T,Ogawa K,Kokufuta E

    更新日期:2003-11-01 00:00:00

  • Ultrasound-modulated shape memory and payload release effects in a biodegradable cylindrical rod made of chitosan-functionalized PLGA microspheres.

    abstract::Minimally invasive implants and/or scaffolds integrated with multiple functionalities are of interest in the clinical settings. In this paper, chitosan (CTS) functionalized poly(lactic-co-glycolic acid) (PLGA) microspheres containing a model payload, lysozyme (Lyz), were prepared by a water-in-oil-in-water emulsion me...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm4003464

    authors: Bao M,Zhou Q,Dong W,Lou X,Zhang Y

    更新日期:2013-06-10 00:00:00

  • Modulation of cellulose nanocrystals amphiphilic properties to stabilize oil/water interface.

    abstract::Neutral cellulose nanocrystals dispersed in water were shown in a previous work to stabilize oil/water interfaces and produce Pickering emulsions with outstanding stability, whereas sulfated nanocrystals obtained from cotton did not show interfacial properties. To develop a better understanding of the stabilization me...

    journal_title:Biomacromolecules

    pub_type: 杂志文章

    doi:10.1021/bm201599j

    authors: Kalashnikova I,Bizot H,Cathala B,Capron I

    更新日期:2012-01-09 00:00:00