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| Author(s): |
Ariane Cavalcante dos Santos Sousa
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Conjunto das Químicas (IQ e FCF) (CQ/DBDCQ) |
| Defense date: | 2016-10-17 |
| Examining board members: |
Helio Alexandre Stefani;
Daniel Carvalho Pimenta;
Flávia Amoroso Matos e Silva
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| Advisor: | Helio Alexandre Stefani |
| Abstract | |
Malaria is a major cause of death in many tropical countries, killing over 438 thousand people annually worldwide. Thus, the objective of this study was to synthesize fluorescent compounds 2,5-diarylfuranes through cross-coupling reaction like Suzuki-Miyaura and engage the drug Primaquine to use them as laboratory specific biomarkers, carriers of substances, parasiticide, and the development new diagnostic method. Through this type of reaction, three fluorescent compounds were synthesized: probe 3-AFA, 3-AFA ala and 4-AFAPQ. Initially were used primary cells, strain RAW 264.7 cells line and erythrocytic cells, those derived from Balb/c mice inoculated intraperitoneally with 106 IE/mL of P. berghei ANKA GFP. The synthesized fluorescent compounds 3-AFA and 3-AFA ala were incubated with the above said cells and found the ability of penetrating probes and mark healthy cells and/or infected. The acquisition of the results was performed by flow cytometry and confocal microscopy. From there, it was also used human blood from that donation was infected with P. falciparum 3D7. The analysis performed with fluorescence microscopy and EC50 these tests with erythrocytes, and HepG2 cells. The probes 3-AFA and 4-AFAPQ were incubated with these cells to evaluate the parasiticidal activity and cytotoxicity of these compounds. Our results showed that the probes 3-AFA and 3-AFA ala were not able to penetrate macrophages. However, they were able to pass the membrane of the parasite infected erythrocytes marking. When the fluorescents probes 3-AFA and 4- AFAPQ (coupled Primaquine) were inserted into human erythrocytes infected with P. falciparum 3D7, it was observed that both marked the parasite in her 3 phases. But EC50 results showed that the compounds do not have parasiticidal effect. And we can conclude that these compounds are not cytotoxic to the cells having then a potential be studied further, with some modifications in their structures to improve thus efficiency and selectivity. Given these potentially fluorescent compounds, it was possible to develop a new method of simple and inexpensive rapid diagnosis that can enable the range in places where conventional methods of microscopy not arrive. (AU) | |
| FAPESP's process: | 14/14583-0 - Synthesis of de 2,5-Diarylfurans: Potential Fluorescent Probes |
| Grantee: | Ariane Cavalcante dos Santos Sousa |
| Support Opportunities: | Scholarships in Brazil - Master |