Superstructure based on β-CD self-assembly induced by a small guest molecule
The size, shape and surface chemistry of nanoparticles play an important role in cellular interaction. Thus, the main objective of the present study was the determination of the β-cyclodextrin (β-CD) self-assembly thermodynamic parameters and its structure, aiming to use these assemblies as a possib...
| Main Authors: | , , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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Royal Society of Chemistry
2014
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| Online Access: | http://hdl.handle.net/1721.1/91598 https://orcid.org/0000-0003-4255-0492 |
| _version_ | 1826188675177775104 |
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| author | De Sousa, Frederico B. Lima, Ana C. Denadai, Angelo M. L. Anconi, Cleber P. A. De Almeida, Wagner B. Novato, Willian T. G. Dos Santos, Helio F. Drum, Chester L. Langer, Robert Sinisterra, Ruben D. |
| author2 | Massachusetts Institute of Technology. Department of Chemical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Chemical Engineering De Sousa, Frederico B. Lima, Ana C. Denadai, Angelo M. L. Anconi, Cleber P. A. De Almeida, Wagner B. Novato, Willian T. G. Dos Santos, Helio F. Drum, Chester L. Langer, Robert Sinisterra, Ruben D. |
| author_sort | De Sousa, Frederico B. |
| collection | MIT |
| description | The size, shape and surface chemistry of nanoparticles play an important role in cellular interaction. Thus, the main objective of the present study was the determination of the β-cyclodextrin (β-CD) self-assembly thermodynamic parameters and its structure, aiming to use these assemblies as a possible controlled drug release system. Light scattering measurements led us to obtain the β-CD's critical aggregation concentration (cac) values, and consequently the thermodynamic parameters of the β-CD spontaneous self-assembly in aqueous solution: Δ[subscript agg]G[superscript o] = −16.31 kJ mol[superscript −1], Δ[subscript agg]H[superscript o] = −26.48 kJ mol[superscript −1] and TΔ[subscript agg]S[superscript o] = −10.53 kJ mol[superscript −1] at 298.15 K. Size distribution of the self-assembled nanoparticles below and above cac was 1.5 nm and 60–120 nm, respectively. The number of β-CD molecules per cluster and the second virial coefficient were identified through Debye's plot and molecular dynamic simulations proposed the three-fold assembly for this system below cac. Ampicillin (AMP) was used as a drug model in order to investigate the key role of the guest molecule in the self-assembly process and the β-CD:AMP supramolecular system was studied in solution, aiming to determine the structure of the supramolecular aggregate. Results obtained in solution indicated that the β-CD's cac was not affected by adding AMP. Moreover, different complex stoichiometries were identified by nuclear magnetic resonance and isothermal titration calorimetry experiments. |
| first_indexed | 2024-09-23T08:02:59Z |
| format | Article |
| id | mit-1721.1/91598 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:02:59Z |
| publishDate | 2014 |
| publisher | Royal Society of Chemistry |
| record_format | dspace |
| spelling | mit-1721.1/915982022-09-30T01:57:09Z Superstructure based on β-CD self-assembly induced by a small guest molecule De Sousa, Frederico B. Lima, Ana C. Denadai, Angelo M. L. Anconi, Cleber P. A. De Almeida, Wagner B. Novato, Willian T. G. Dos Santos, Helio F. Drum, Chester L. Langer, Robert Sinisterra, Ruben D. Massachusetts Institute of Technology. Department of Chemical Engineering De Sousa, Frederico B. Drum, Chester L. Langer, Robert The size, shape and surface chemistry of nanoparticles play an important role in cellular interaction. Thus, the main objective of the present study was the determination of the β-cyclodextrin (β-CD) self-assembly thermodynamic parameters and its structure, aiming to use these assemblies as a possible controlled drug release system. Light scattering measurements led us to obtain the β-CD's critical aggregation concentration (cac) values, and consequently the thermodynamic parameters of the β-CD spontaneous self-assembly in aqueous solution: Δ[subscript agg]G[superscript o] = −16.31 kJ mol[superscript −1], Δ[subscript agg]H[superscript o] = −26.48 kJ mol[superscript −1] and TΔ[subscript agg]S[superscript o] = −10.53 kJ mol[superscript −1] at 298.15 K. Size distribution of the self-assembled nanoparticles below and above cac was 1.5 nm and 60–120 nm, respectively. The number of β-CD molecules per cluster and the second virial coefficient were identified through Debye's plot and molecular dynamic simulations proposed the three-fold assembly for this system below cac. Ampicillin (AMP) was used as a drug model in order to investigate the key role of the guest molecule in the self-assembly process and the β-CD:AMP supramolecular system was studied in solution, aiming to determine the structure of the supramolecular aggregate. Results obtained in solution indicated that the β-CD's cac was not affected by adding AMP. Moreover, different complex stoichiometries were identified by nuclear magnetic resonance and isothermal titration calorimetry experiments. Brazil. National Institute in Science and Technology in Nanobiopharmaceutics (NanoBiofar) (CNPq/MCT/FAPEMIG) Conselho Nacional de Pesquisas (Brazil) National Institutes of Health (U.S.) (Grant 1-R01-DE016516-03) Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (Process 4597-08-7) Fundacao de Amparo a Pesquisa do Estado de Minas Gerais (CEX APQ-00498/08) 2014-11-17T18:46:11Z 2014-11-17T18:46:11Z 2012-01 2011-08 Article http://purl.org/eprint/type/JournalArticle 1463-9076 1463-9084 http://hdl.handle.net/1721.1/91598 De Sousa, Frederico B., Ana C. Lima, Angelo M. L. Denadai, Cleber P. A. Anconi, Wagner B. De Almeida, Willian T. G. Novato, Helio F. Dos Santos, Chester L. Drum, Robert Langer, and Ruben D. Sinisterra. “Superstructure Based on β-CD Self-Assembly Induced by a Small Guest Molecule.” Physical Chemistry Chemical Physics 14, no. 6 (2012): 1934. https://orcid.org/0000-0003-4255-0492 en_US http://dx.doi.org/10.1039/c2cp22768a Physical Chemistry Chemical Physics Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Royal Society of Chemistry PMC |
| spellingShingle | De Sousa, Frederico B. Lima, Ana C. Denadai, Angelo M. L. Anconi, Cleber P. A. De Almeida, Wagner B. Novato, Willian T. G. Dos Santos, Helio F. Drum, Chester L. Langer, Robert Sinisterra, Ruben D. Superstructure based on β-CD self-assembly induced by a small guest molecule |
| title | Superstructure based on β-CD self-assembly induced by a small guest molecule |
| title_full | Superstructure based on β-CD self-assembly induced by a small guest molecule |
| title_fullStr | Superstructure based on β-CD self-assembly induced by a small guest molecule |
| title_full_unstemmed | Superstructure based on β-CD self-assembly induced by a small guest molecule |
| title_short | Superstructure based on β-CD self-assembly induced by a small guest molecule |
| title_sort | superstructure based on β cd self assembly induced by a small guest molecule |
| url | http://hdl.handle.net/1721.1/91598 https://orcid.org/0000-0003-4255-0492 |
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