Unsaturation pattern of phosphatidylglycerols modulating the interaction of lysicamine with cells membrane models at the air-water interface

Autor(es)

Machado, Andre Campos ; da Silva, Tamiris Reissa Cipriano ; Raminelli, Cristiano ; Caseli, Luciano

• Tipo de documento: Artigo Científico
• Fonte: COLLOIDS AND SURFACES B-BIOINTERFACES; v. 222, p. 10-pg., 2023-02-01.

Resumo

Lysicamine, an alkaloid with tumorigenic activity, was incorporated in cell membrane models made of lipid Langmuir monolayers. Dipalmitoylphosphocholine (DPPC), dioleoylphosphocholine (DOPC), and palmitoylo-leoylcholine (POPC) represented non-tumorigenic cell membranes, and dipalmitoylphosphoserine (DPPS), dio-leoylphosphoserine (DOPS), and palmitoyloleoylserine (POPS), tumorigenic ones. The monolayers were characterized by tensiometry, infrared spectroscopy, and Brewster Angle Microscopy (BAM). No significant shifts of the isotherms were observed for the saturated lipids (DPPC and DPPS), while for the others (DOPC, POPS, DOPS, and POPS), more significant changes were observed not only in the compression isotherms but also in the surface pressure-time curve for pre-compressed monolayers. The molecular organization, as well as the morphology of the drug-lipid monolayers, could be inferred with infrared spectroscopy and BAM. While the first revealed that the alkyl chain ordering changed upon lysicamine incorporation, the second showed how the drug could distinctly change the state of aggregation of molecular domains at the air-water interface. In conclusion, lysicamine could interact distinctly with each lipid at the air-water interface, showing the dependence not only on the lipid polar groups but also on the level of unsaturation of the alkyl chains. (AU)

• Processo FAPESP: 18/22214-6 - Rumo à convergência de tecnologias: de sensores e biossensores à visualização de informação e aprendizado de máquina para análise de dados em diagnóstico clínico
• Beneficiário: Osvaldo Novais de Oliveira Junior
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 19/03239-0 - Interfaces nanoestruturadas para a investigação de substâncias bioativas em modelos de membrana celular e para a construção de dispositivos optoeletrônicos enzimáticos
• Beneficiário: Luciano Caseli
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 20/01183-5 - Interação da lisicamina com modelos de membrana celular na interface ar-água
• Beneficiário: André Campos Machado
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 20/12530-8 - 2-(Trimetilsilil)aril trifluorometanossulfonatos como precursores de arinos visando à preparação de compostos (hetero)aromáticos funcionalizados e sínteses de produtos naturais bioativos
• Beneficiário: Cristiano Raminelli
• Modalidade de apoio: Auxílio à Pesquisa - Regular