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Kim S, Kim G, Ji YW, Moon CE, Jung Y, Lee HK, Lee J, Koh WG. Real-time and label-free biosensing using moiré pattern generated by bioresponsive hydrogel. Bioact Mater 2023; 23:383-393. [DOI: 10.1016/j.bioactmat.2022.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 10/14/2022] [Accepted: 11/15/2022] [Indexed: 11/30/2022] Open
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2
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Wei T, Huang S, Hu Q, Wang J, Huo Z, Zhu T, Wu C, Chen H. Thermoresponsive Metallo-protein-based Hybrid Hydro-gels for Reversible and Highly Selective Removal of Lead(II) from Water. Polym Chem 2022. [DOI: 10.1039/d1py01574e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
It is interesting to develop biomaterials for easily removing ultra-trace toxic metal ions from the environment. Herein, we have synthesized a thermoresponsive hybrid hydrogel PNIPAM-co-PbrRP by incorporating a reconstituted lead-binding...
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3
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Huang S, Liu X, Hu Q, Wei T, Wang J, Chen H, Wu C. Temperature-Driven Metalloprotein-Based Hybrid Hydrogels for Selective and Reversible Removal of Cadmium(II) from Water. ACS APPLIED MATERIALS & INTERFACES 2020; 12:2991-2998. [PMID: 31860264 DOI: 10.1021/acsami.9b19306] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
To develop biomaterials that easily and reversibly remove trace amounts of metal ions, we synthesized PNIPAM-co-CadRP, a thermally sensitive hybrid hydrogel by immobilizing a reconstituted cadmium binding peptide (CadRP) derived from the metalloregulatory protein CadR in a poly(N-isopropylacrylamide) (PNIPAM) gel network. The hybrid hydrogel retains the properties of the immobilized peptide and highly sensitively and selectively binds Cd(II) ions. The thermally sensitive properties of the hybrid hydrogel, which swells at low temperatures (<34 °C) and shrinks at high temperatures, provides a driving force sufficient to alternate the conformation of the immobilized CadRP such that the peptide captures and releases metal ions at high and low temperatures, respectively. Using this novel hybrid gel, we captured nanomolar Cd(II) from samples of environmental water in a highly efficient manner, leading to a practical and repeatedly reusable material to remediate our environment.
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Affiliation(s)
- Shanqing Huang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Life Sciences , Nanjing University , Nanjing , China
| | - Xichun Liu
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Life Sciences , Nanjing University , Nanjing , China
| | - Qingyuan Hu
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Life Sciences , Nanjing University , Nanjing , China
| | - Tianbiao Wei
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Life Sciences , Nanjing University , Nanjing , China
| | - Jue Wang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Life Sciences , Nanjing University , Nanjing , China
| | - Hao Chen
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Life Sciences , Nanjing University , Nanjing , China
| | - Chi Wu
- Department of Chemistry , The Chinese University of Hong Kong , Hong Kong , China
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4
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Surface-Immobilized Biomolecules. Biomater Sci 2020. [DOI: 10.1016/b978-0-12-816137-1.00036-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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5
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Hoffman AS, Stayton PS. Applications of “Smart Polymers” as Biomaterials. Biomater Sci 2020. [DOI: 10.1016/b978-0-12-816137-1.00016-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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6
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Qin J, Li X, Cao L, Du S, Wang W, Yao SQ. Competition-Based Universal Photonic Crystal Biosensors by Using Antibody–Antigen Interaction. J Am Chem Soc 2019; 142:417-423. [DOI: 10.1021/jacs.9b11116] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Junjie Qin
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
- School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, P.R. China
| | - Xueqiang Li
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
| | - Lixin Cao
- School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, P.R. China
| | - Shubo Du
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
| | - Wei Wang
- School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, P.R. China
- Aramco Research Center-Boston, Aramco Services Company, Cambridge, Massachusetts 02139, United States
| | - Shao Q. Yao
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
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Das A, Theato P. Activated Ester Containing Polymers: Opportunities and Challenges for the Design of Functional Macromolecules. Chem Rev 2015; 116:1434-95. [DOI: 10.1021/acs.chemrev.5b00291] [Citation(s) in RCA: 285] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anindita Das
- Institute
for Technical and
Macromolecular Chemistry, University of Hamburg, D-20146 Hamburg, Germany
| | - Patrick Theato
- Institute
for Technical and
Macromolecular Chemistry, University of Hamburg, D-20146 Hamburg, Germany
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8
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Tan H, Zhao L, Liu W, Ren L, Xu S, Chen L, Li W. Synthesis of thermo-responsive polymer–protein conjugates through disulfide bonding. RSC Adv 2014. [DOI: 10.1039/c4ra06813k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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9
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El-Nagga NEA, El-Ewasy SM, El-Shweihy NM. Microbial L-asparaginase as a Potential Therapeutic Agent for the Treatment of Acute Lymphoblastic Leukemia: The Pros and Cons. INT J PHARMACOL 2014. [DOI: 10.3923/ijp.2014.182.199] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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10
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Biofabrication Using Pyrrole Electropolymerization for the Immobilization of Glucose Oxidase and Lactate Oxidase on Implanted Microfabricated Biotransducers. Bioengineering (Basel) 2014; 1:85-110. [PMID: 28955018 DOI: 10.3390/bioengineering1010085] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2013] [Revised: 03/01/2014] [Accepted: 03/12/2014] [Indexed: 11/16/2022] Open
Abstract
The dual responsive Electrochemical Cell-on-a-Chip Microdisc Electrode Array (ECC MDEA 5037) is a recently developed electrochemical transducer for use in a wireless, implantable biosensor system for the continuous measurement of interstitial glucose and lactate. Fabrication of the biorecognition membrane via pyrrole electropolymerization and both in vitro and in vivo characterization of the resulting biotransducer is described. The influence of EDC-NHS covalent conjugation of glucose oxidase with 4-(3-pyrrolyl) butyric acid (monomerization) and with 4-sulfobenzoic acid (sulfonization) on biosensor performance was examined. As the extent of enzyme conjugation was increased sensitivity decreased for monomerized enzymes but increased for sulfonized enzymes. Implanted biotransducers were examined in a Sprague-Dawley rat hemorrhage model. Resection after 4 h and subsequent in vitro re-characterization showed a decreased sensitivity from 0.68 (±0.40) to 0.22 (±0.17) µA·cm-2·mM-1, an increase in the limit of detection from 0.05 (±0.03) to 0.27 (±0.27) mM and a six-fold increase in the response time from 41 (±18) to 244 (±193) s. This evidence reconfirms the importance of biofouling at the bio-abio interface and the need for mitigation strategies to address the foreign body response.
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11
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Wang X, Wang X. Aptamer-functionalized hydrogel diffraction gratings for the human thrombin detection. Chem Commun (Camb) 2013; 49:5957-9. [PMID: 23715375 DOI: 10.1039/c3cc41827h] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The aptamer-functionalized hydrogel diffraction gratings were successfully fabricated by incorporating an aptamer and its complementary sequence as crosslinking junctions in the network structure. The gratings showed a sensitive response to human thrombin as read out from the diffracted light.
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Affiliation(s)
- Xiaoqi Wang
- Department of Chemical Engineering, Laboratory of Advanced Materials (MOE), Tsinghua University, Beijing, PR China
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12
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13
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Hoffman AS, Hubbell JA. Surface-Immobilized Biomolecules. Biomater Sci 2013. [DOI: 10.1016/b978-0-08-087780-8.00032-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Miyata T, Hayashi T, Kuriu Y, Uragami T. Responsive behavior of tumor-marker-imprinted hydrogels using macromolecular cross-linkers. J Mol Recognit 2012; 25:336-43. [DOI: 10.1002/jmr.2190] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | - Takeshi Hayashi
- Department of Chemistry and Materials Engineering; Kansai University; Suita; Osaka; 564-8680; Japan
| | - Yoshiaki Kuriu
- Department of Chemistry and Materials Engineering; Kansai University; Suita; Osaka; 564-8680; Japan
| | - Tadashi Uragami
- Department of Chemistry and Materials Engineering; Kansai University; Suita; Osaka; 564-8680; Japan
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15
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Miyata T, Asami N, Uragami T. Structural design of stimuli-responsive bioconjugated hydrogels that respond to a target antigen. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/polb.21812] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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16
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17
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Uragami T, Ueguchi K, Watanabe M, Miyata T. Preparation of urease-immobilized polymeric membranes and their function. Catal Today 2006. [DOI: 10.1016/j.cattod.2005.12.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Miyata T, Jige M, Nakaminami T, Uragami T. Tumor marker-responsive behavior of gels prepared by biomolecular imprinting. Proc Natl Acad Sci U S A 2006; 103:1190-3. [PMID: 16432230 PMCID: PMC1360525 DOI: 10.1073/pnas.0506786103] [Citation(s) in RCA: 190] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We report dynamic glycoprotein recognition of gels prepared by biomolecular imprinting using lectin and antibody molecules as ligands for tumor-specific marker glycoproteins. The glycoprotein-imprinted gels prepared with minute amounts of cross-linkers could dynamically recognize tumor-specific marker glycoproteins by lectin and antibody ligands and induce volume changes according to the glycoprotein concentration. The glycoprotein-imprinted gel shrank in response to a target glycoprotein but nonimprinted gel swelled a little. The glycoprotein-responsive shrinking of the imprinted gel was caused by formation of lectin-glycoprotein-antibody complexes that acted as reversible cross-linking points. Glycoprotein-imprinted gels only shrank when both lectin and antibody in the gels simultaneously recognized the saccharide and peptide chains of the target glycoprotein. As shrinking behavior of biomolecularly imprinted gels in response to glycoproteins enables the accurate detection and recognition of tumor-specific marker glycoproteins, they have many potential applications as smart devices in sensing systems and for molecular diagnostics.
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Affiliation(s)
- Takashi Miyata
- Unit of Chemistry, Faculty of Engineering and High Technology Research Center, Kansai University, Suita, Osaka 564-8680, Japan.
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19
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Sebra RP, Masters KS, Bowman CN, Anseth KS. Surface grafted antibodies: controlled architecture permits enhanced antigen detection. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:10907-11. [PMID: 16285751 DOI: 10.1021/la052101m] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The attachment of antibodies to substrate surfaces is useful for achieving specific detection of antigens and toxins associated with clinical and field diagnostics. Here, acrylated whole antibodies were produced through conjugation chemistry, with the goal of covalently photografting these proteins from surfaces in a controlled fashion, to facilitate rapid and sensitive antigenic detection. A living radical photopolymerization chemistry was used to graft the acrylated whole antibodies on polymer surfaces at controlled densities and spatial locations by controlling the exposure time and area, respectively. Copolymer grafts containing these antibodies were synthesized to demonstrate two principles. First, PEG functionalities were introduced to prevent nonspecific protein interactions and improve the reaction kinetics by increasing solvation and mobility of the antibody-containing chains. Both of these properties lead to sensitive (pM) and rapid (<20 min) detection of antigens with this surface modification technique. Second, graft composition was tailored to include multiple antibodies on the same grafted chains, establishing a means for simultaneously detecting multiple antigens on one grafted surface area. Finally, the addition of PEG spacers between the acrylate functionality and the pendant detection antibodies was tuned to enhance the detection of a short-half-life molecule, glucagon, in a complex biological environment, plasma.
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20
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Tada D, Tanabe T, Tachibana A, Yamauchi K. Drug release from hydrogel containing albumin as crosslinker. J Biosci Bioeng 2005; 100:551-5. [PMID: 16384795 DOI: 10.1263/jbb.100.551] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2005] [Accepted: 08/01/2005] [Indexed: 11/17/2022]
Abstract
Albumin is the major plasma protein and acts as a physiological carrier for various compounds including drugs. To take advantage of the drug-binding ability of albumin for a drug delivery system, we have prepared hydrogels consisting of acrylamide (AAm) and bovine serum albumin (BSA) by introducing three to four vinyl groups into one BSA molecule and subsequently copolymerizing it with AAm. The resultant hydrogel was solubilized by trypsin treatment, since BSA served as a crosslinker in the hydrogel. The BSA-crosslinked hydrogel (BSA-AAm hydrogel) was loaded with salicylic acid or sodium benzoate and their release was investigated. The BSA-AAm hydrogel released much more salicylic acid than sodium benzoate. In addition, the amount of released salicylic acid increased with the BSA content of the hydrogel, despite a decrease in the swelling ratio of the hydrogel. On the other hand, the amount of released sodium benzoate increased with the swelling ratio. When a hydrogel crosslinked with N,N'-methylenebis (acrylamide) was used as a control, both drugs showed release tendencies similar to that of sodium benzoate from the BSA-AAm hydrogel. Furthermore, the salicylic acid release was sustained longer on the BSA-AAm hydrogel than the sodium benzoate release. Taken together, it is thought that albumin in the BSA-AAm hydrogel preferentially adsorbs salicylic acid and contributes to the high drug loading and the sustained release of salicylic acid.
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Affiliation(s)
- Daisuke Tada
- Department of Applied and Bioapplied Chemistry, Graduate School of Engineering, Osaka City University, 3-3-13 Sugimoto, Japan
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21
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Bignotti F, Sartore L, Penco M, Ramorino G, Peroni I. Effect of montmorillonite on the properties of thermosensitive poly(N-isopropylacrylamide) composite hydrogels. J Appl Polym Sci 2004. [DOI: 10.1002/app.20671] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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Ivanov AE, Edink E, Kumar A, Galaev IY, Arendsen AF, Bruggink A, Mattiasson B. Conjugation of penicillin acylase with the reactive copolymer of N-isopropylacrylamide: a step toward a thermosensitive industrial biocatalyst. Biotechnol Prog 2003; 19:1167-75. [PMID: 12892478 DOI: 10.1021/bp0201455] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Conjugation of penicillin acylase (PA) to poly-N-isopropylacrylamide (polyNIPAM) was studied as a way to prepare a thermosensitive biocatalyst for industrial applications to antibiotic synthesis. Condensation of PA with the copolymer of NIPAM containing active ester groups resulted in higher coupling yields of the enzyme (37%) compared to its chemical modification and copolymerization with the monomer (9% coupling yield) at the same NIPAM:enzyme weight ratio of ca. 35. A 10-fold increase of the enzyme loading on the copolymer resulted in 24% coupling yield and increased by 4-fold the specific PA activity of the conjugate. Two molecular forms of the conjugate were found by gel filtration on Sepharose CL 4B: the lower molecular weight fraction of ca. 10(6) and, presumably, cross-linked protein-polymer aggregates of MW > 10(7). Michaelis constant for 5-nitro-3-phenylacetamidobenzoic acid hydrolysis by the PA conjugate (20 microM) was found to be slightly higher than that of the free enzyme (12 microM), and evaluation of V(max) testifies to the high catalytic efficiency of the conjugated enzyme. PolyNIPAM-cross-linked PA retained its capacity to synthesize cephalexin from d-phenylglycin amide and 7-aminodeacetoxycephalosporanic acid. The synthesis-hydrolysis ratios of free and polyNIPAM-cross-linked enzyme in cephalexin synthesis were 7.46 and 7.49, respectively. Thus, diffusional limitation, which is a problem in the industrial production of beta-lactam antibiotics, can be successfully eliminated by cross-linking penicillin acylase to a smart polymer (i.e., polyNIPAM).
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Affiliation(s)
- Alexander E Ivanov
- Department of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, S-221 00 Lund, Sweden
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Higuchi A, Shirano K, Harashima M, Yoon BO, Hara M, Hattori M, Imamura K. Chemically modified polysulfone hollow fibers with vinylpyrrolidone having improved blood compatibility. Biomaterials 2002; 23:2659-66. [PMID: 12059015 DOI: 10.1016/s0142-9612(01)00406-9] [Citation(s) in RCA: 210] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hydrophilic polysulfone membranes (PVP-PSf) were prepared from polysulfone membranes covalently conjugated with polyvinylpyrrolidone (PVP) on the surface. The immobilized amount of vinylpyrrolidone on PVP-PSf membranes was controlled by the amount of vinylpyrrolidone monomer in the reaction solution and the reaction time. The PVP-PSf membranes were found to be the most hydrophilic membranes among the polysulfone and surface-modified polysulfone membranes prepared in this study. This is explained by the long hydrophilic side chain of polyvinylpyrrolidone on the PVP-PSf membranes which contributes to the hydrophilic wiper on the hydrophobic PSf membranes. It was found that PVP-PSf membranes gave lower protein adsorption from a plasma solution than polysulfone and other surface-modified membranes (p < 0.01). This is attributed to the hydrophilic surface of the PVP-PSf membranes, because the hydrophilic surface is known to reduce the protein adsorption on the membranes. The PVP-PSf membranes showed a much suppressed number of adhering platelets on the surface than polysulfone and other surface-modified membranes (p < 0.01). It is suggested that the hydrophilic surface of the PVP-PSf membranes without ionic groups causes the suppression of platelet adhesion on the PVP-PSf membranes and that the long hydrophilic side chain of polyvinylpyrrolidone on PVP-PSf membranes contributes to the hydrophilic and hemocompatible wipers on the surface of the hydrophobic PSf membranes.
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Affiliation(s)
- Akon Higuchi
- Department of Applied Chemistry, Seikei University, Musashino, Tokyo, Japan.
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24
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Abstract
Stimuli-responsive hydrogels that undergo abrupt changes in volume in response to external stimuli such as pH, temperature and solvent composition have potential applications in biomedicine and the creation of 'intelligent' materials systems, for example as media for drug delivery, separation processes and protein immobilization. Hydrogels have been reported that respond to pH, temperature, electric fields and saccharides. For some biomedical applications it would be very useful to have a material whose swelling response was dictated by a specific protein. Here we report such a material, which swells reversibly in a buffer solution in response to a specific antigen. The hydrogel was prepared by grafting the antigen and corresponding antibody to the polymer network, so that binding between the two introduces crosslinks in the network. Competitive binding of the free antigen triggers a change in gel volume owing to breaking of these non-covalent crosslinks. In addition, we show that the hydrogel displays shape-memory behaviour, and that stepwise changes in antigen concentration can induce pulsatile permeation of a protein through the network.
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Affiliation(s)
- T Miyata
- Chemical Branch, Faculty of Engineering and High Technology Research Center, Kansai University, Suita, Osaka, Japan.
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Liang L, Feng X, Liu J, Rieke PC. Preparation of composite-crosslinked poly(N-isopropylacrylamide) gel layer and characteristics of reverse hydrophilic-hydrophobic surface. J Appl Polym Sci 1999. [DOI: 10.1002/(sici)1097-4628(19990404)72:1<1::aid-app1>3.0.co;2-b] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Miyata T, Asami N, Uragami T. Preparation of an Antigen-Sensitive Hydrogel Using Antigen−Antibody Bindings. Macromolecules 1999. [DOI: 10.1021/ma981659g] [Citation(s) in RCA: 134] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takashi Miyata
- Chemical Branch, Faculty of Engineering and High Technology Research Center, Kansai University, Suita, Osaka, 564-8680 Japan
| | - Noriko Asami
- Chemical Branch, Faculty of Engineering and High Technology Research Center, Kansai University, Suita, Osaka, 564-8680 Japan
| | - Tadashi Uragami
- Chemical Branch, Faculty of Engineering and High Technology Research Center, Kansai University, Suita, Osaka, 564-8680 Japan
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Ding Z, Chen G, Hoffman AS. Unusual properties of thermally sensitive oligomer-enzyme conjugates of poly(N-isopropylacrylamide)-trypsin. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 1998; 39:498-505. [PMID: 9468062 DOI: 10.1002/(sici)1097-4636(19980305)39:3<498::aid-jbm22>3.0.co;2-5] [Citation(s) in RCA: 95] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Reversible soluble-insoluble oligomer-enzyme conjugates have been prepared by conjugating a thermally sensitive oligomer, poly(N-isopropylacrylamide) [poly(NIPAAm)] to trypsin. The conjugates can catalyze enzymatic reactions in solution and then may be separated from the solution by thermal precipitation. One special feature of the conjugates is that every poly(NIPAAm) chain has only one end attachment to the enzyme, so that the loss of enzymatic activity due to steric hindrance should be minimized. Conjugates with various numbers of oligomer chains per trypsin molecule were prepared. Surprisingly, the conjugates increased in enzymatic activity with increasing oligomer conjugation to the native trypsin. The trypsin active sites in the conjugates were accessible to large molecules, such as soybean trypsin inhibitor (MW = 21,500). The enzyme conjugates were more stable than native trypsin, both in solution and in the precipitated phase. On the other hand, the conjugates lost enzymatic activity faster than native trypsin when the temperature was repeatedly cycled through the lower critical solution temperature (LCST) of the poly(NIPAAm). The recovery of the conjugates by thermal precipitation in each cycle was over 95% even after 14 cycles through the LCST.
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Affiliation(s)
- Z Ding
- Center for Bioengineering, University of Washington, Seattle 98195, USA
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Abramson S, Alexander H, Best S, Bokros J, Brunski JB, Colas A, Cooper SL, Curtis J, Haubold A, Hench LL, Hergenrother RW, Hoffman AS, Hubbell JA, Jansen JA, King MW, Kohn J, Lamba NM, Langer R, Migliaresi C, More RB, Peppas NA, Ratner BD, Visser SA, Recum AV, Weinberg S, Yannas IV. Classes of Materials Used in Medicine. Biomater Sci 1996. [DOI: 10.1016/b978-012582460-6/50005-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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29
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ALEXANDER HAROLD, BRUNSKI JOHNB, COOPER STUARTL, HENCH LARRYL, HERGENROTHER ROBERTW, HOFFMAN ALLANS, KOHN JOACHIM, LANGER ROBERT, PEPPAS NIKOLAOSA, RATNER BUDDYD, SHALABY SHALABYW, VISSER SUSANA, YANNAS IOANNISV. Classes of Materials Used in Medicine. Biomater Sci 1996. [DOI: 10.1016/b978-0-08-050014-0.50007-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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30
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31
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Hoffman AS. Applications of thermally reversible polymers and hydrogels in therapeutics and diagnostics. J Control Release 1987. [DOI: 10.1016/0168-3659(87)90083-6] [Citation(s) in RCA: 629] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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