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Chiaverini L, Tolbatov I, Marrone A, Marzo T, Biver T, La Mendola D. Unveiling the mechanism of activation of the Te(IV) prodrug AS101. New chemical insights towards a better understanding of its medicinal properties. J Inorg Biochem 2024; 256:112567. [PMID: 38669911 DOI: 10.1016/j.jinorgbio.2024.112567] [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] [Received: 02/14/2024] [Revised: 04/04/2024] [Accepted: 04/17/2024] [Indexed: 04/28/2024]
Abstract
AS101 (Ammonium trichloro (dioxoethylene-O,O') tellurate) is an important hypervalent Te-based prodrug. Recently, we started a systematic investigation on AS101 with the aim to correlate its promising biological effects as a potent immunomodulator drug with multiple medicinal applications and its specific chemical properties. To date, a substantial agreement on the rapid conversion of the initial AS101 species into the corresponding TeOCl3- anion does exist, and this latter species is reputed as the pharmacologically active one. However, we realized that TeOCl3- could quickly undergo further steps of conversion in an aqueous medium, eventually producing the TeO2 species. Using a mixed experimental and theoretical investigation approach, we characterized the conversion process leading to TeO2 occurring both in pure water and in reference buffers at physiological-like pH. Our findings may offer a valuable "chemical tool" for a better description, interpretation -and optimization- of the mechanism of action of AS101 and Te-based compounds. This might be a starting point for improved AS101-based medicinal application.
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Affiliation(s)
- Lorenzo Chiaverini
- Department of Pharmacy, University of Pisa. Via Bonanno Pisano 6, 56126 Pisa, Italy
| | - Iogann Tolbatov
- Department of Physics and Astronomy, University of Padova, via F. Marzolo 8, 35131 Padova, Italy
| | - Alessandro Marrone
- Department of Pharmacy, Università degli Studi "G. D'Annunzio" Chieti-Pescara, Via dei Vestini, 66100 Chieti, Italy
| | - Tiziano Marzo
- Department of Pharmacy, University of Pisa. Via Bonanno Pisano 6, 56126 Pisa, Italy.
| | - Tarita Biver
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi, 13, 56124 Pisa, Italy
| | - Diego La Mendola
- Department of Pharmacy, University of Pisa. Via Bonanno Pisano 6, 56126 Pisa, Italy
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Singh A, Dhau J, Kumar R, Badru R, Kaushik A. Exploring the fluorescence properties of tellurium-containing molecules and their advanced applications. Phys Chem Chem Phys 2024; 26:9816-9847. [PMID: 38497121 DOI: 10.1039/d3cp05740b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
This review article explores the fascinating realm of fluorescence using organochalcogen molecules, with a particular emphasis on tellurium (Te). The discussion encompasses the underlying mechanisms, structural motifs influencing fluorescence, and the applications of these intriguing phenomena. This review not only elucidates the current state of knowledge but also identifies avenues for future research, thereby serving as a valuable resource for researchers and enthusiasts in the field of fluorescence chemistry with a focus on Te-based molecules. By highlighting challenges and prospects, this review sparks a conversation on the transformative potential of Te-containing compounds across different fields, ranging from environmental solutions to healthcare and materials science applications. This review aims to provide a comprehensive understanding of the distinct fluorescence behaviors exhibited by Te-containing compounds, contributing valuable insights to the evolving landscape of chalcogen-based fluorescence research.
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Affiliation(s)
- Avtar Singh
- Research and Development, Molekule Group Inc., 3802 Spectrum Blvd., Tampa, Florida 33612, USA.
- Department of Chemistry, Sri Guru Teg Bahadur Khalsa College, Anandpur Sahib, Punjab 140118, India
| | - Jaspreet Dhau
- Research and Development, Molekule Group Inc., 3802 Spectrum Blvd., Tampa, Florida 33612, USA.
| | - Rajeev Kumar
- Department of Environment Studies, Panjab University, Chandigarh 160014, India
| | - Rahul Badru
- Department of Chemistry, Sri Guru Granth Sahib World University, Fatehgarh Sahib, Punjab 140406, India
| | - Ajeet Kaushik
- NanoBioTech Laboratory, Department of Environmental Engineering, Florida Polytechnic University, Lakeland, FL 33805, USA
- School of Engineering, University of Petroleum and Energy Studies (UPES), Dehradun, Uttarakhand, India
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Chiaverini L, Cirri D, Tolbatov I, Corsi F, Piano I, Marrone A, Pratesi A, Marzo T, La Mendola D. Medicinal Hypervalent Tellurium Prodrugs Bearing Different Ligands: A Comparative Study of the Chemical Profiles of AS101 and Its Halido Replaced Analogues. Int J Mol Sci 2022; 23:ijms23147505. [PMID: 35886853 PMCID: PMC9317073 DOI: 10.3390/ijms23147505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/04/2022] [Accepted: 07/05/2022] [Indexed: 02/01/2023] Open
Abstract
Ammonium trichloro (dioxoethylene-O,O′) tellurate (AS101) is a potent immunomodulator prodrug that, in recent years, entered various clinical trials and was tested for a variety of potential therapeutic applications. It has been demonstrated that AS101 quickly activates in aqueous milieu, producing TeOCl3−, which likely represents the pharmacologically active species. Here we report on the study of the activation process of AS101 and of two its analogues. After the synthesis and characterization of AS101 and its derivatives, we have carried out a comparative study through a combined experimental and computational analysis. Based on the obtained results, we describe here, for the first time, the detailed reaction that AS101 and its bromido- and iodido-replaced analogues undergo in presence of water, allowing the conversion of the original molecule to the likely true pharmacophore. Interestingly, moving down in the halogens’ group we observed a higher tendency to react, attributable to the ligands’ effect. The chemical and mechanistic implications of these meaningful differences are discussed.
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Affiliation(s)
- Lorenzo Chiaverini
- Department of Pharmacy, University of Pisa, Via Bonanno Pisano, 6, 56126 Pisa, Italy; (L.C.); (F.C.); (I.P.); (D.L.M.)
| | - Damiano Cirri
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi, 13, 56124 Pisa, Italy; (D.C.); (A.P.)
| | - Iogann Tolbatov
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, 43007 Tarragona, Spain
- Correspondence: (I.T.); (T.M.)
| | - Francesca Corsi
- Department of Pharmacy, University of Pisa, Via Bonanno Pisano, 6, 56126 Pisa, Italy; (L.C.); (F.C.); (I.P.); (D.L.M.)
| | - Ilaria Piano
- Department of Pharmacy, University of Pisa, Via Bonanno Pisano, 6, 56126 Pisa, Italy; (L.C.); (F.C.); (I.P.); (D.L.M.)
| | - Alessandro Marrone
- Dipartimento di Farmacia, Università degli Studi “G. D’Annunzio” Chieti-Pescara, Via dei Vestini, 66100 Chieti, Italy;
| | - Alessandro Pratesi
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi, 13, 56124 Pisa, Italy; (D.C.); (A.P.)
| | - Tiziano Marzo
- Department of Pharmacy, University of Pisa, Via Bonanno Pisano, 6, 56126 Pisa, Italy; (L.C.); (F.C.); (I.P.); (D.L.M.)
- Correspondence: (I.T.); (T.M.)
| | - Diego La Mendola
- Department of Pharmacy, University of Pisa, Via Bonanno Pisano, 6, 56126 Pisa, Italy; (L.C.); (F.C.); (I.P.); (D.L.M.)
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