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Master's Dissertation
DOI
https://doi.org/10.11606/D.46.2023.tde-11122023-181544
Document
Author
Full name
Pedro Henrique Salgado Marcon
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2023
Supervisor
Committee
Esposito, Breno Pannia (President)
Alves, Wendel Andrade
Cerchiaro, Giselle
Title in Portuguese
Síntese, caracterização e atividade antiproliferativa contra linhagens tumorais de duas novas tiossemicarbazonas
Keywords in Portuguese
Atividade antiproliferativa
HeLa
HepG2
Quelantes
Tiossemicarbazonas
Abstract in Portuguese
As tiossemicarbazonas têm recebido atenção devido à sua variedade de propriedades biológicas. Sua diversidade de efeitos, como atividades antibacterianas, antivirais, antifúngicas e antineoplásicas, motiva a exploração e investigação de numerosos compostos dentro dessa classe. Os complexos de íons metálicos de ferro, cobre, zinco, níquel, platina, ouro e entre outros, com as tiossemicarbazonas são interesse de pesquisa dentro da área da química bioinorgâ- nica, pelo fato de apresentarem atividades e mecanismos de ação in vitro contra células de câncer. Este trabalho relata a síntese, caracterização e atividade antiproliferativa de duas novas moléculas da classe das tiossemicarbazonas: pentano-1,5-diilidenobis(N-metilhidrazina-1-carbotioamida) [H2L1] e pentano-1,5-diilidenobis(N-benzilhidrazina-1-carbotioamida) [H2L2]. Ambos os compostos foram totalmente caracterizados através de temperatura de fusão, análise elementar (para carbono, hidrogênio e nitrogênio), espectroscopia de infravermelho (FTIR), espectroscopia de absorção UV-Vis, ressonância magnética nuclear de prótons (1H) e carbono- 13 (13C) e espectrometria de massas por ionização por spray de elétrons (ESI-MS). O ensaio de viabilidade celular foi realizado contra linhagens de células tumorais HeLa (câncer cervical) e HepG2 (câncer de fígado humano). H2L1 possui uma maior atividade antiproliferativa quando comparada a H2L2 contra ambas as linhagens de células tumorais estudadas; a diferença entre os dois perfis provavelmente se deve à variação estrutural entre as moléculas, uma vez que a única diferença é a mudança do grupo terminal metil para o benzil. O IC50 para H2L1 está em baixas concentrações micromolares, mostrando-se mais citotóxico que a cisplatina contra a linhagem HeLa, enquanto demonstra uma citotoxicidade semelhante à da cisplatina contra HepG2; H2L2 não demonstrou citotoxicidade relevante, visto que seu IC 50 tem valores maiores que 100µM.
Title in English
Synthesis, characterization and anti-proliferative activity against tumoral cell lines of two new thiosemicarbazones
Keywords in English
Antiproliferative activity
Chelators
HeLa
HepG2
Thiosemicarbazones
Abstract in English
Thiosemicarbazones have gathered attention due to their variety of biological properties. Their diverse effects, such as bactericidal, antiviral, antifungal, and antineoplastic activities, motivate exploration and investigation of numerous compounds within this class. Complexes of metal ions such as iron, copper, zinc, nickel, platinum, gold, among others, with thiosemicarbazones are subjects of research in the field of bioinorganic chemistry due to their in vitro activities and mechanisms of action against cancer cells. This work reports the synthesis, characterization, and anti-proliferative activity of two novel molecules of the thiosemicarbazone class: pentane-1,5-diylidenebis(N-methylhydrazine-1-carbothioamide) [H2L1] and pentane-1,5- diylidenebis(N-benzylhydrazine-1-carbothioamide) [H2L2]. Both compounds were fully characterized through melting point, elemental analysis (for carbon, hydrogen, and nitrogen), infrared spectroscopy (FTIR), UV-Vis absorption spectroscopy, proton nuclear magnetic resonance (1H NMR), carbon-13 NMR (13C NMR) and electron spray ionization mass spectrometry (ESIMS). The cell viability assay was conducted against HeLa (cervical cancer) and HepG2 (human liver cancer) cell lines. H2L1 exhibits higher anti-proliferative activity compared to H2L2 against both studied tumor cell lines; the difference in their profiles is likely due to structural variation between the molecules, as the only distinction is the change from a methyl to a benzyl terminal group The IC50 for H2L1 is at low micromolar concentrations, showing greater cytotoxicity than cisplatin against HeLa, while demonstrating similar cytotoxicity to cisplatin against HepG2; H2L2 did not show relevant cytotoxicity, as its IC50 comprises values greater than 100µM.
 
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Publishing Date
2024-01-23
 
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