1
|
Fucoxanthin’s Optimization from Undaria pinnatifida Using Conventional Heat Extraction, Bioactivity Assays and In Silico Studies. Antioxidants (Basel) 2022; 11:antiox11071296. [PMID: 35883788 PMCID: PMC9311727 DOI: 10.3390/antiox11071296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 06/24/2022] [Accepted: 06/25/2022] [Indexed: 11/17/2022] Open
Abstract
Brown macroalgae are a potential source of natural pigments. Among them, Undaria pinnatifida is recognized for its high concentration of fucoxanthin (Fx), which is a pigment with a wide range of bioactivities. In this study, three independent parameters were optimized for conventional heat extraction (CHE) to maximize the recovery of Fx from Undaria pinnatifida. Optimal conditions (temperature = 45 °C, solvent = 70%, and time = 61 min) extracted 5.1 mg Fx/g dw. Later, the bioactivities of the Fx-rich extracts (antioxidant, antimicrobial, and neuroprotective) were assessed using in vitro and in silico approaches. In vitro assays indicated that Fx has a strong antioxidant capacity and even stronger antimicrobial activity against gram-positive bacteria. This data was supported in silico where Fx established a high binding affinity to DR, a Staphylococcus aureus protein, through aa ALA-8, LEU-21, and other alkane interactions. Finally, the in vitro enzymatic inhibition of AChE using Fx, was further supported using docking models that displayed Fx as having a high affinity for aa TYR72 and THR 75; therefore, the Fx extraction behavior explored in this work may reduce the costs associated with energy and solvent consumption. Moreover, this paper demonstrates the efficiency of CHE when recovering high amounts of Fx from Undaria pinnatifida. Furthermore, these findings can be applied in different industries.
Collapse
|
2
|
Souza FD, Rodrigues Garcia D, Cuya T, Pimentel AS, Gonçalves ADS, Alencastro RBD, França TCC. Molecular Modeling Study of Uncharged Oximes Compared to HI-6 and 2-PAM Inside Human AChE Sarin and VX Conjugates. ACS OMEGA 2020; 5:4490-4500. [PMID: 32175496 PMCID: PMC7066550 DOI: 10.1021/acsomega.9b03737] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 02/12/2020] [Indexed: 06/10/2023]
Abstract
The deleterious effects of nerve agents over the enzymes acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) turned these compounds into the most dangerous chemical weapons known. Among the antidotes in use today against these agents, oximes in combination with other drugs are the only treatment with any action. HI-6 and 2-PAM are cationic oximes proved to be effective for the reactivation of AChE inhibited by the nerve agents VX and sarin (GB). However, when it comes to reactivation of AChE inside the central or peripheral nervous systems, charged molecules present low diffusion due to low penetration through the blood-brain barrier. Uncharged oximes appear as an interesting alternative to solve this problem, but the development and enhancement of more efficient uncharged oximes capable of reactivating human AChE is still necessary. Given the limitations for in vivo and in vitro experimental studies with nerve agents, modeling is an important tool that can contribute to a better understanding of factors that may affect the efficiency of uncharged oximes. In order to investigate the interaction and behavior of cationic and uncharged oximes, we performed here molecular docking, molecular dynamics simulations, and binding energies calculations of the known cationic oximes HI-6 and 2-PAM plus four uncharged oximes found in the literature, complexed with human AChE (HssACHE) conjugated with the nerve agents VX and GB. The uncharged oximes showed different behaviors, especially RS194B, which presented stability inside AChE-VX, but presented free binding energy lower than cationic oximes, suggesting that structural alterations could favor its interactions with these complexes. In contrast, HI-6 and 2-PAM showed higher affinities with more negative binding energy values and larger contribution of the amino acid Asp74, demonstrating the importance of the quaternary nitrogen to the affinity and interaction of oximes with AChE-GB and AChE-VX conjugates.
Collapse
Affiliation(s)
- Felipe
Rodrigues de Souza
- Laboratory
of Molecular Modeling Applied
to Chemical and Biological Defense (LMCBD), Military Institute of Engineering, 22290-270 Rio de Janeiro/RJ, Brazil
- Department
of Chemistry, Pontifical Catholic University
of Rio de Janeiro, 22451-900 Rio de Janeiro/RJ, Brazil
| | - Danielle Rodrigues Garcia
- Laboratory
of Molecular Modeling Applied
to Chemical and Biological Defense (LMCBD), Military Institute of Engineering, 22290-270 Rio de Janeiro/RJ, Brazil
| | - Teobaldo Cuya
- Faculty
of Technology, University of the State of
Rio de Janeiro, 27537-000 Resende/RJ, Brazil
| | - André Silva Pimentel
- Department
of Chemistry, Pontifical Catholic University
of Rio de Janeiro, 22451-900 Rio de Janeiro/RJ, Brazil
| | - Arlan da Silva Gonçalves
- Postgraduate
Program in Sustainable Technologies (PPGTECS), Federal Institute of Education Science and Technology of Espírito
Santo, Unit Vila Velha, 29056-255 Vila Velha/ES, Brazil
- Postgraduate
Program in Chemistry (PPGQUI), Federal University
of Espírito Santo, 29075-910 Vitória, ESBrazil
| | | | - Tanos Celmar Costa França
- Laboratory
of Molecular Modeling Applied
to Chemical and Biological Defense (LMCBD), Military Institute of Engineering, 22290-270 Rio de Janeiro/RJ, Brazil
- Department
of Chemistry, Faculty of Science, University
of Hradec Kralove, Rokitanskeho
62, 50003 Hradec
Kralove, Czech Republic
| |
Collapse
|
3
|
Manhas A, Lone MY, Jha PC. Multicomplex-based pharmacophore modeling in conjunction with multi-target docking and molecular dynamics simulations for the identification of PfDHFR inhibitors. J Biomol Struct Dyn 2019; 37:4181-4199. [DOI: 10.1080/07391102.2018.1540362] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Anu Manhas
- School of Chemical Sciences, Central University of Gujarat, Gandhinagar, Gujarat, India
| | - Mohsin Y. Lone
- School of Chemical Sciences, Central University of Gujarat, Gandhinagar, Gujarat, India
- Department of Chemistry, Indian Institute of Technology Gandhinagar, Gandhinagar, Gujarat, India
| | - Prakash C. Jha
- Centre for Applied Chemistry, Central University of Gujarat, Gandhinagar, Gujarat, India
| |
Collapse
|
4
|
Rodrigues Garcia D, Rodrigues de Souza F, Paula Guimarães A, Castro Ramalho T, Palermo de Aguiar A, Celmar Costa França T. Design of inhibitors of thymidylate kinase from Variola virus as new selective drugs against smallpox: part II. J Biomol Struct Dyn 2019; 37:4569-4579. [PMID: 30488769 PMCID: PMC9491145 DOI: 10.1080/07391102.2018.1554510] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Acknowledging the importance of studies toward the development of measures against terrorism and bioterrorism, this study aims to contribute to the design of new prototypes of potential drugs against smallpox. Based on a former study, nine synthetic feasible prototypes of selective inhibitors for thymidylate kinase from Variola virus (VarTMPK) were designed and submitted to molecular docking, molecular dynamics simulations and binding energy calculations. The compounds are simplifications of two more complex scaffolds, with a guanine connected to an amide or alcohol through a spacer containing ether and/or amide groups, formerly suggested as promising for the design of selective inhibitors of VarTMPK. Our study showed that, despite the structural simplifications, the compounds presented effective energy values in interactions with VarTMPK and HssTMPK and that the guanine could be replaced by a simpler imidazole ring linked to a –NH2 group, without compromising the affinity for VarTMPK. It was also observed that a positive charge in the imidazole ring is important for the selectivity toward VarTMPK and that an amide group in the spacer does not contribute to selectivity. Finally, prototype 3 was pointed as the most promising to be synthesized and experimentally evaluated. Communicated by Ramaswamy H. Sarma
Collapse
Affiliation(s)
- Danielle Rodrigues Garcia
- Laboratory of Molecular Modeling Applied to Chemical and Biological Defense, Military Institute of Engineering, Rio de Janeiro, RJ, Brazil
| | - Felipe Rodrigues de Souza
- Laboratory of Molecular Modeling Applied to Chemical and Biological Defense, Military Institute of Engineering, Rio de Janeiro, RJ, Brazil
| | | | - Teodorico Castro Ramalho
- Laboratory of Computational Chemistry, Department of Chemistry, UFLA, Lavras, MG, Brazil
- Faculty of Informatics and Management, Center for Basic and Applied Research, University of Hradec Králové, Hradec Králove, Czech Republic
| | | | - Tanos Celmar Costa França
- Laboratory of Molecular Modeling Applied to Chemical and Biological Defense, Military Institute of Engineering, Rio de Janeiro, RJ, Brazil
- Faculty of Informatics and Management, Center for Basic and Applied Research, University of Hradec Králové, Hradec Králove, Czech Republic
| |
Collapse
|
5
|
Theoretical investigations of human acetylcholinesterase inhibition efficiency by neurotoxic organophosphorus compounds. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.05.072] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
6
|
Wang N, Ren JX, Xie Y. Identification of novel DHFR inhibitors for treatment of tuberculosis by combining virtual screening with in vitro activity assay. J Biomol Struct Dyn 2018; 37:1054-1061. [DOI: 10.1080/07391102.2018.1448721] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Nan Wang
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Science, Peking Union Medical College, 151 Malianwa North Road, Haidian District, Beijing 100193, PR China
| | - Ji-Xia Ren
- College of Life Science, Liaocheng University, Liaocheng 252059, PR China
| | - Yong Xie
- College of Life Science, Liaocheng University, Liaocheng 252059, PR China
| |
Collapse
|
7
|
Bastos LDC, de Souza FR, Pereira Souza LM, Forgione P, Cuya T, de Alencastro RB, Pimentel AS, Celmar Costa França T. Investigating the selectivity of potential new inhibitors of dihydrofolate reductase from Yersinia pestis designed by molecular modeling. J Biomol Struct Dyn 2018. [PMID: 29542379 DOI: 10.1080/07391102.2018.1452796] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Leonardo da Costa Bastos
- a Laboratory of Molecular Modeling Applied to the Chemical and Biological Defense (LMCBD) , Military Institute of Engieering , Rio de Janeiro 22290-270 , RJ , Brazil
| | - Felipe Rodrigues de Souza
- a Laboratory of Molecular Modeling Applied to the Chemical and Biological Defense (LMCBD) , Military Institute of Engieering , Rio de Janeiro 22290-270 , RJ , Brazil
| | - Lucas Miguel Pereira Souza
- b Department of Chemistry , Pontifical Catholic University of Rio de Janeiro , Rio de Janeiro 22453-900 , RJ , Brazil
| | - Pat Forgione
- c Department of Chemistry & Biochemistry , Concordia University , Montreal , QC , Canada
| | - Teobaldo Cuya
- d Faculty of Technology, Department of Mathematics, Physics and Computation , University of the State of Rio de Janeiro , Resende , RJ , Brazil
| | | | - Andre Silva Pimentel
- b Department of Chemistry , Pontifical Catholic University of Rio de Janeiro , Rio de Janeiro 22453-900 , RJ , Brazil
| | - Tanos Celmar Costa França
- a Laboratory of Molecular Modeling Applied to the Chemical and Biological Defense (LMCBD) , Military Institute of Engieering , Rio de Janeiro 22290-270 , RJ , Brazil.,f Faculty of Informatics and Management, Center for Basic and Applied Research , University of Hradec Kralove , Hradec Kralove , Czech Republic
| |
Collapse
|
8
|
Rodrigues de Souza F, Rodrigues Garcia D, Cuya T, Kuca K, de Alencastro RB, França TCC. Behavior of uncharged oximes compared to HI6 and 2-PAM in the human AChE-tabun conjugate: a molecular modeling approach. J Biomol Struct Dyn 2017; 36:1430-1438. [PMID: 28446076 DOI: 10.1080/07391102.2017.1324322] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Tabun is one of the most dangerous nerve agents because it has deleterious effects like inhibition of the essential enzymes acetylcholinesterase (AChE) and butyrylcholinesterase. Some oximes such HI6 as 2-PAM are nucleophiles that are capable to reactivate inhibited human AChE under some conditions. Zwitterionic and cationic species have the best chance of productive action on inhibited AChE. However uncharged oximes can give important interaction information. In order to investigate the interaction and behavior of cationic and uncharged oximes, we performed molecular docking simulations and molecular dynamics and calculated binding energies of complexes of these compounds with human AChE. The uncharged oximes of larger structure were more susceptible to the influence of the substituents on the phosphorus atom and presented low binding energies. In contrast, HI 6 and 2-PAM showed high binding energy values with great contribution of the amino acid Asp74, demonstrating the importance of the quaternary nitrogen to the affinity and interaction of the oximes/AChE tabun-inhibited complexes.
Collapse
Affiliation(s)
- Felipe Rodrigues de Souza
- a Laboratory of Molecular Modeling Applied to Chemical and Biological Defense (LMCBD) Military Institute of Engineering , Rio de Janeiro , Brazil
| | - Danielle Rodrigues Garcia
- a Laboratory of Molecular Modeling Applied to Chemical and Biological Defense (LMCBD) Military Institute of Engineering , Rio de Janeiro , Brazil
| | - Teobaldo Cuya
- b Faculty of Technology , University of the State of Rio de Janeiro , Resende , Brazil
| | - Kamil Kuca
- c Center for Basic and Applied Research, Faculty of Informatics and Management , University of Hradec Králové , Hradec Králové , Czech Republic.,d University Hospital Hradec Králové , Hradec Králové , Czech Republic
| | | | - Tanos Celmar Costa França
- a Laboratory of Molecular Modeling Applied to Chemical and Biological Defense (LMCBD) Military Institute of Engineering , Rio de Janeiro , Brazil.,c Center for Basic and Applied Research, Faculty of Informatics and Management , University of Hradec Králové , Hradec Králové , Czech Republic
| |
Collapse
|