1
|
Maine A, Tamayo L, Leiva Á, González A, Ríos HE, Rojas-Romo C, Jara P, Araya-Durán I, González-Nilo F, Yazdani-Pedram M, Santana P, Leal M, González N, Briones X, Villalobos V, Urzúa M. Conformational Changes of Poly(Maleic Anhydride- alt-styrene) Modified with Amino Acids in an Aqueous Medium and Their Effect on Cytocompatibility and Hemolytic Response. ACS APPLIED BIO MATERIALS 2023; 6:5333-5348. [PMID: 38032020 DOI: 10.1021/acsabm.3c00603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
The conformational changes of poly(maleic anhydride-alt-styrene) (PSMA) modified with different amino acids (PSMA-Aa) were studied in an aqueous medium as a function of ionic strength and pH. The specific viscosity of PSMA-Aa decreased with increasing salt concentration due to a more compact conformation. There was a decrease in surface tension with increasing concentrations of the modified polyelectrolyte having a greater effect for the PSMA modified with l-phenylalanine at pH 7.0, demonstrating a greater surface-active character. The conformational changes were also confirmed by molecular dynamics studies, indicating that PSMA-Aa exhibits a compact structure at pH 4.0 and a more extended structure at pH 7.0. On the other hand, the conformational changes of PSMA-Aa were related to its biological response, where the higher surface-active character of the PSMA modified with l-phenylalanine correlates very well with the higher hemolytic activity observed in red blood cells, in which the surface-active capacity supports lytic potency in erythrocytes. The cytocompatibility assays indicated that there were no significant cytotoxic effects of the PSMA-Aa. Additionally, in solvent-accessible surface area studies, it was shown that the carboxylate groups of the PSMA modified with l-phenylalanine are more exposed to the solvent at pH 7.0 and high salt concentrations, which correlates with lower fluorescence intensity, reflecting a loss of mitochondrial membrane potential. It is concluded that the study of the conformational changes in PE modified with amino acids is essential for their use as biomaterials and relevant to understanding the possible effects of PE modified with amino acids in biological systems.
Collapse
Affiliation(s)
- Arianne Maine
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Casilla 653, Ñuñoa, Santiago 7800003,Chile
| | - Laura Tamayo
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Casilla 653, Ñuñoa, Santiago 7800003,Chile
| | - Ángel Leiva
- Departamento de Química Física, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna N° 4860, Macul, Santiago 7821093, Chile
| | - Alex González
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Casilla 653, Ñuñoa, Santiago 7800003,Chile
| | - Hernán E Ríos
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Casilla 653, Ñuñoa, Santiago 7800003,Chile
| | - Carlos Rojas-Romo
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Casilla 653, Ñuñoa, Santiago 7800003,Chile
| | - Paul Jara
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Casilla 653, Ñuñoa, Santiago 7800003,Chile
| | - Ingrid Araya-Durán
- Center for Bioinformatics and Integrative Biology, Facultad de Ciencias para la Vida, Universidad Andrés Bello, Avenida República 330, Santiago 8370146, Chile
| | - Fernando González-Nilo
- Center for Bioinformatics and Integrative Biology, Facultad de Ciencias para la Vida, Universidad Andrés Bello, Avenida República 330, Santiago 8370146, Chile
| | - Mehrdad Yazdani-Pedram
- Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Olivos, 1007 Santiago, Chile
| | - Paula Santana
- Instituto de Ciencias Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, El Llano Subercaseaux 2801, San Miguel, Santiago 8910123, Chile
| | - Matías Leal
- Center for Bioinformatics and Integrative Biology, Facultad de Ciencias para la Vida, Universidad Andrés Bello, Avenida República 330, Santiago 8370146, Chile
| | - Nicolás González
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Casilla 653, Ñuñoa, Santiago 7800003,Chile
| | - Ximena Briones
- Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Olivos, 1007 Santiago, Chile
| | - Valeria Villalobos
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Casilla 653, Ñuñoa, Santiago 7800003,Chile
| | - Marcela Urzúa
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Casilla 653, Ñuñoa, Santiago 7800003,Chile
| |
Collapse
|
5
|
Pashirova TN, Fetin PA, Lezov AA, Kadnikov MV, Valeeva FG, Burilova EA, Bilibin AY, Zorin IM. Self-Assembled Quaternary Ammonium-Containing Comb-Like Polyelectrolytes for the Hydrolysis of Organophosphorous Esters: Effect of Head Groups and Counter-Ions. Chempluschem 2020; 85:1939-1948. [PMID: 32865345 DOI: 10.1002/cplu.202000417] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/27/2020] [Indexed: 12/17/2022]
Abstract
The aim of this work was to increase the efficiency of catalytic systems for the hydrolytic cleavage of 4-nitrophenyl esters of phosphonic acids. Quaternary ammonium-containing comb-like polyelectrolytes («polymerized micelles») with ester cleavable fragments and a low aggregation threshold were used as catalysts. The synthesis of poly(11-acryloyloxyundecylammonium) surfactants with different counterions (Br- , NO3 - , CH3 C6 H4 SO3 - ) and head groups was realized by micellar free-radical polymerization. Molecular weight, critical association concentration, particle sizes and solubilization properties toward Orange OT were determined. Self-assemblies organized by poly(11-acryloyloxyundecyltrimethyl ammonium) bromide successfully catalyze the hydrolysis of 4-nitrophenyl butylchloromethylphosphonate up to two orders of magnitude compared to aqueous alkaline hydrolysis. The development of these catalysts is promising for industrial applications and organophosphorus compound detoxification.
Collapse
Affiliation(s)
- Tatiana N Pashirova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov St., 8, Kazan, 420088, Russian Federation
| | - Petr A Fetin
- Institute of Chemistry, St. Petersburg State University, 7/9 Universitetskaya nab, St., Petersburg, 199034, Russian Federation
| | - Alexey A Lezov
- Department of Molecular Biophysics and Polymer Physics, Physical Faculty, St. Petersburg State University, 7/9 Universitetskaya nab, St., Petersburg, 199034, Russian Federation
| | - Matvey V Kadnikov
- Institute of Chemistry, St. Petersburg State University, 7/9 Universitetskaya nab, St., Petersburg, 199034, Russian Federation
| | - Farida G Valeeva
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov St., 8, Kazan, 420088, Russian Federation
| | - Evgenia A Burilova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov St., 8, Kazan, 420088, Russian Federation
| | - Alexander Yu Bilibin
- Institute of Chemistry, St. Petersburg State University, 7/9 Universitetskaya nab, St., Petersburg, 199034, Russian Federation
| | - Ivan M Zorin
- Institute of Chemistry, St. Petersburg State University, 7/9 Universitetskaya nab, St., Petersburg, 199034, Russian Federation
| |
Collapse
|