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Christopher MW, Klug AC, Lee JH, Ericson AC, Feizbakhsh Bazargani S, Dinglasan RR, Prentice BM, Garrett TJ. Indole-3-pyruvate: Analysis and Control of Tautomerism and Reactivity. Anal Chem 2024; 96:10399-10407. [PMID: 38858849 DOI: 10.1021/acs.analchem.4c01584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
It is well-known in biochemistry that structure confers function, meaning that chemical structural elucidation is critical to truly understanding the function of a given metabolite. Indole-3-pyruvate (IPyA) exists in an equilibrium between the keto and enol tautomeric forms. IPyA is suggested to play a role in immune function; however, determining whether the tautomeric forms function differently can only be studied if an analytical method is capable of distinguishing between the two forms. Herein, we describe the use of UHPLC-HRMS to gain insight into the physical variables that govern IPyA tautomer equilibrium, reactivity, and detection limit. We use hydrogen-deuterium exchange (HDX) to identify enol and keto peaks, and we show that tautomers exhibit a valley of fronting followed by a tailing peak shape (though separation is still attainable) and identical MS/MS spectra. We observed drastically different ratios of keto and enol forms in different solvents, which is an important consideration for in vitro studies. IPyA was found to be highly unstable with accelerated reactivity in peroxides. Through in vitro reactivity studies, IPyA produced a myriad of known and unknown metabolites via nonenzymatic processes, many of which were mapped in vivo via the analysis of human plasma. Finally, we show that vitamin C (ascorbic acid) can slow this reactivity and enable sensitive detection in whole blood.
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Affiliation(s)
- Michael W Christopher
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Alexander C Klug
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Jae Hwan Lee
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Aiden C Ericson
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | | | - Rhoel R Dinglasan
- Department of Infectious Disease and Immunology, University of Florida, College of Veterinary Medicine, Gainesville, Florida 32608, United States
| | - Boone M Prentice
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Timothy J Garrett
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
- Department of Pathology, Immunology, and Laboratory Medicine, University of Florida, College of Medicine, Gainesville, Florida 32608, United States
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Shinde Y, Patil R, Badireenath Konkimalla V, Merugu SB, Mokashi V, Harihar S, Marrot J, Butcher RJ, Salunke-Gawali S. Keto-enol tautomerism of hydroxynaphthoquinoneoxime ligands: Copper complexes and topoisomerase inhibition activity. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Patil R, Jadhav M, Salunke-Gawali S, Lande DN, Gejji SP, Chakravarty D. 1H and 13C NMR chemical shifts of 2- n-alkylamino-naphthalene-1,4-diones. Heliyon 2021; 7:e06044. [PMID: 33553738 PMCID: PMC7848645 DOI: 10.1016/j.heliyon.2021.e06044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 09/29/2020] [Accepted: 01/18/2021] [Indexed: 10/25/2022] Open
Abstract
1H as well as 13C chemical shifts of 32 compounds of C (3) substituted 2-(n-alkylamino)-3R-naphthalene-1,4-dione (where n-alkyl: methyl, to octyl, R = H, Cl, Br, and CH3) are investigated through 1H, 13C, DEPT, gDQCOSY, and gHSQCAD NMR experiments and M06-2X/6-311++G (d,p) density functional theory are discussed. Single crystal X-ray structure of Br-3, as well as 18 different derivatives of naphthalene-1,4-diones, are revealed for its inter and intra-molecular hydrogen bonding interactions.
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Affiliation(s)
- Rishikesh Patil
- Department of Chemistry, Savitribai Phule Pune University, Pune, 411007, Maharashtra State, India
| | - Mahesh Jadhav
- Department of Chemistry, Savitribai Phule Pune University, Pune, 411007, Maharashtra State, India
| | - Sunita Salunke-Gawali
- Department of Chemistry, Savitribai Phule Pune University, Pune, 411007, Maharashtra State, India
| | - Dipali N Lande
- Department of Chemistry, Savitribai Phule Pune University, Pune, 411007, Maharashtra State, India
| | - Shridhar P Gejji
- Department of Chemistry, Savitribai Phule Pune University, Pune, 411007, Maharashtra State, India
| | - Debamitra Chakravarty
- Central Instrumentation Facility, Savitribai Phule Pune University, Pune, 411007, Maharashtra State, India
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de Luna Martins D, Borges AA, E Silva NADA, Faria JV, Hoelz LVB, de Souza HVCM, Bello ML, Boechat N, Ferreira VF, Faria RX. P2X7 receptor inhibition by 2-amino-3-aryl-1,4-naphthoquinones. Bioorg Chem 2020; 104:104278. [PMID: 33010623 DOI: 10.1016/j.bioorg.2020.104278] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 09/10/2020] [Accepted: 09/11/2020] [Indexed: 12/14/2022]
Abstract
Extracellular ATP activates purinergic receptors such as P2X7, cationic channels for Ca2+, K+, and Na+. There is robust evidence of the involvement of these receptors in the immune response, so P2X7 receptors (P2X7R) are considered a potential therapeutic target for the development of anti-inflammatory drugs. Although there are many studies of the anti-inflammatory properties of naphthoquinones, these molecules have not yet been explored as P2X7 antagonists. In previous work, our group prepared 3-substituted (halogen or aryl) 2-hydroxy-1,4-naphthoquinones and studied their action on P2X7R. In this paper, eight 2-amino-3-aryl-1,4-naphthoquinones were evaluated to identify the inhibitory activity on P2X7R and the toxicological profile. Three analogues (AD-4CN, AD-4Me, and AD-4F) exhibited reduced toxicity for mammalian cells with CC50 values higher than 500 µM. These three 3-substituted 2-amino-1,4-naphthoquinones inhibited murine P2X7R (mP2X7R) in vitro. However, the analogues AD-4CN and AD-4Me showed low selectivity index values. AD-4F inhibited both mP2X7R and human P2X7R (hP2X7R) with IC50 values of 0.123 and 0.93 µM, respectively. Additionally, this analogue exhibited higher potency than BBG at inhibiting the ATP-induced release of IL-1β in vitro. Carrageenan-induced paw edema in vivo was reversed for AD-4F with an ID50 value of 11.51 ng/kg. Although AD-4F was less potent than previous 3-substituted (halogen or aryl) 2-hydroxy-1,4-naphthoquinones such as AN-04in vitro, this 3-substituted 2-amino-1,4-naphthoquinone revealed higher potency in vivo to reduce the edematogenic response. In silico analysis suggests that the binding site of the novel 2-amino-3-aryl-1,4-naphthoquinone derivatives, including all the tautomeric forms, is located in the pore area of the hP2X7R model. Based on these results, we considered AD-4F to be a satisfactory P2X7R inhibitor. AD-4F might be used as a scaffold structure to design a novel series of inhibitors with potential inhibitory activity on murine (mP2X7R) and human (hP2X7R) P2X7 receptors.
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Affiliation(s)
- Daniela de Luna Martins
- Research Group on Catalysis and Synthesis (CSI), Universidade Federal Fluminense, Laboratório 413, Instituto de Química, Campus do Valonguinho, Centro, Niterói, RJ 24020-141, Brazil. https://www.facebook.com/LabCSI/
| | - Adriel Alves Borges
- Research Group on Catalysis and Synthesis (CSI), Universidade Federal Fluminense, Laboratório 413, Instituto de Química, Campus do Valonguinho, Centro, Niterói, RJ 24020-141, Brazil
| | - Nayane A do A E Silva
- Research Group on Catalysis and Synthesis (CSI), Universidade Federal Fluminense, Laboratório 413, Instituto de Química, Campus do Valonguinho, Centro, Niterói, RJ 24020-141, Brazil
| | - Juliana Vieira Faria
- Postgraduate Program in Sciences and Biotechnology, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil; Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Laboratório de Toxoplasmose e outras protozooses, Avenida Brasil 4365, Manguinhos CEP 21045-900, Rio de Janeiro, RJ, Brazil
| | - Lucas Villas Bôas Hoelz
- Laboratorio de Sintese de Farmacos - LASFAR, Farmanguinhos - Fiocruz, Fundacao Oswaldo Cruz, Rua Sizenando Nabuco, 100 - Manguinhos, Rio de Janeiro, RJ 21041-250, Brazil
| | - Hellen Valério Chaves Moura de Souza
- Laboratorio de Sintese de Farmacos - LASFAR, Farmanguinhos - Fiocruz, Fundacao Oswaldo Cruz, Rua Sizenando Nabuco, 100 - Manguinhos, Rio de Janeiro, RJ 21041-250, Brazil
| | - Murilo Lamim Bello
- Laboratório de Planejamento Farmacêutico e Simulação Computacional, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-590, Brazil
| | - Nubia Boechat
- Laboratorio de Sintese de Farmacos - LASFAR, Farmanguinhos - Fiocruz, Fundacao Oswaldo Cruz, Rua Sizenando Nabuco, 100 - Manguinhos, Rio de Janeiro, RJ 21041-250, Brazil
| | - Vitor Francisco Ferreira
- Departamento de Tecnologia Farmacêutica, Universidade Federal Fluminense, Faculdade de Farmácia, R. Dr Mario Vianna, 523 - Santa Rosa, Niterói, RJ 24241-002, Brazil
| | - Robson Xavier Faria
- Postgraduate Program in Sciences and Biotechnology, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil; Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Laboratório de Toxoplasmose e outras protozooses, Avenida Brasil 4365, Manguinhos CEP 21045-900, Rio de Janeiro, RJ, Brazil
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