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Adessi TG, Wagner PM, Bisogno FR, Nicotra VE, Guido ME, García ME. Enhancing structural diversity through chemical engineering of Ambrosia tenuifolia extract for novel anti-glioblastoma compounds. Sci Rep 2024; 14:14229. [PMID: 38902325 PMCID: PMC11190268 DOI: 10.1038/s41598-024-63639-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 05/30/2024] [Indexed: 06/22/2024] Open
Abstract
Natural products are an unsurpassed source of leading structures in drug discovery. The biosynthetic machinery of the producing organism offers an important source for modifying complex natural products, leading to analogs that are unattainable by chemical semisynthesis or total synthesis. In this report, through the combination of natural products chemistry and diversity-oriented synthesis, a diversity-enhanced extracts approach is proposed using chemical reactions that remodel molecular scaffolds directly on extracts of natural resources. This method was applied to subextract enriched in sesquiterpene lactones from Ambrosia tenuifolia (Fam. Asteraceae) using acid media conditions (p-toluenesulfonic acid) to change molecular skeletons. The chemically modified extract was then fractionated by a bioguided approach to obtain the pure compounds responsible for the anti-glioblastoma (GBM) activity in T98G cell cultures. Indeed, with the best candidate, chronobiological experiments were performed to evaluate temporal susceptibility to the treatment on GBM cell cultures to define the best time to apply the therapy. Finally, bioinformatics tools were used to supply qualitative and quantitative information on the physicochemical properties, chemical space, and structural similarity of the compound library obtained. As a result, natural products derivatives containing new molecular skeletons were obtained, with possible applications as chemotherapeutic agents against human GBM T98G cell cultures.
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Affiliation(s)
- Tonino G Adessi
- Facultad de Ciencias Químicas, Universidad Nacional de Córdoba (UNC), Edificio de Ciencias Químicas 2, Haya de la Torre y Medina Allende, Ciudad Universitaria, CP X5000HUA, Córdoba, Argentina
- Instituto Multidisciplinario de Biología Vegetal (IMBIV), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Córdoba, Argentina
| | - Paula M Wagner
- Facultad de Ciencias Químicas, Universidad Nacional de Córdoba (UNC), Edificio de Ciencias Químicas 2, Haya de la Torre y Medina Allende, Ciudad Universitaria, CP X5000HUA, Córdoba, Argentina
- Departamento de Química Biológica Ranwel Caputto, Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC-CONICET), Córdoba, Argentina
| | - Fabricio R Bisogno
- Facultad de Ciencias Químicas, Universidad Nacional de Córdoba (UNC), Edificio de Ciencias Químicas 2, Haya de la Torre y Medina Allende, Ciudad Universitaria, CP X5000HUA, Córdoba, Argentina
- Instituto de Investigaciones en Físico-Química de Córdoba (INFIQC-CONICET), Córdoba, Argentina
| | - Viviana E Nicotra
- Facultad de Ciencias Químicas, Universidad Nacional de Córdoba (UNC), Edificio de Ciencias Químicas 2, Haya de la Torre y Medina Allende, Ciudad Universitaria, CP X5000HUA, Córdoba, Argentina
- Instituto Multidisciplinario de Biología Vegetal (IMBIV), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Córdoba, Argentina
| | - Mario E Guido
- Facultad de Ciencias Químicas, Universidad Nacional de Córdoba (UNC), Edificio de Ciencias Químicas 2, Haya de la Torre y Medina Allende, Ciudad Universitaria, CP X5000HUA, Córdoba, Argentina
- Departamento de Química Biológica Ranwel Caputto, Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC-CONICET), Córdoba, Argentina
| | - Manuela E García
- Facultad de Ciencias Químicas, Universidad Nacional de Córdoba (UNC), Edificio de Ciencias Químicas 2, Haya de la Torre y Medina Allende, Ciudad Universitaria, CP X5000HUA, Córdoba, Argentina.
- Instituto Multidisciplinario de Biología Vegetal (IMBIV), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Córdoba, Argentina.
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Novel and selective inactivators of Triosephosphate isomerase with anti-trematode activity. Sci Rep 2020; 10:2587. [PMID: 32054976 PMCID: PMC7018972 DOI: 10.1038/s41598-020-59460-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 01/29/2020] [Indexed: 12/11/2022] Open
Abstract
Trematode infections such as schistosomiasis and fascioliasis cause significant morbidity in an estimated 250 million people worldwide and the associated agricultural losses are estimated at more than US$ 6 billion per year. Current chemotherapy is limited. Triosephosphate isomerase (TIM), an enzyme of the glycolytic pathway, has emerged as a useful drug target in many parasites, including Fasciola hepatica TIM (FhTIM). We identified 21 novel compounds that selectively inhibit this enzyme. Using microscale thermophoresis we explored the interaction between target and compounds and identified a potent interaction between the sulfonyl-1,2,4-thiadiazole (compound 187) and FhTIM, which showed an IC50 of 5 µM and a Kd of 66 nM. In only 4 hours, this compound killed the juvenile form of F. hepatica with an IC50 of 3 µM, better than the reference drug triclabendazole (TCZ). Interestingly, we discovered in vitro inhibition of FhTIM by TCZ, with an IC50 of 7 µM suggesting a previously uncharacterized role of FhTIM in the mechanism of action of this drug. Compound 187 was also active against various developmental stages of Schistosoma mansoni. The low toxicity in vitro in different cell types and lack of acute toxicity in mice was demonstrated for this compound, as was demonstrated the efficacy of 187in vivo in F. hepatica infected mice. Finally, we obtained the first crystal structure of FhTIM at 1.9 Å resolution which allows us using docking to suggest a mechanism of interaction between compound 187 and TIM. In conclusion, we describe a promising drug candidate to control neglected trematode infections in human and animal health.
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