Photodynamic therapy: from molecular effects in model systems toward photodynamic efficiency in cell culture

• Grant number: 18/16713-0
• Support Opportunities: Regular Research Grants
• Duration: February 01, 2019 - January 31, 2021
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Pedro Henrique Benites Aoki
• Grantee: Pedro Henrique Benites Aoki
• Host Institution: Faculdade de Ciências e Letras (FCL-ASSIS). Universidade Estadual Paulista (UNESP). Campus de Assis. Assis , SP, Brazil
• Associated researchers: Carlos José Leopoldo Constantino ; Priscila Alessio Constantino
• Associated grant(s): 19/23223-1 - Exploiting STED microscopy to unveil cellular damage induced by photosensitizing molecules, AP.R SPRINT

Abstract

This research grant has the general objective of continuing the work of the past Fapesp (2016 / 13280-0) research project, as well as to support the research of the graduate students under my supervision. The project is focused on the photosensitization of lipid membranes and underlying mechanisms of the photodynamic efficiency in the treatment of cancer cells. Specifically, Langmuir and Langmuir-Blodgett (LB) films will mimic the cell membrane of tumor cells, where photosensitizers will be further incorporated and subsequently photo-activated. The goal is to investigate the effects of lipid hydroperoxidation on the physicochemical properties of the membrane, which include surface area increase and cleavage of lipid chains. In addition to the traditional surface pressure measurements (À), vibrational spectroscopy techniques will be applied to the Langmuir (PM-IRRAS) and LB (FTIR) films in order to elucidate the reaction mechanisms at the molecular level. The final goal is to correlate the findings at the molecular scale with photodynamic efficiency in complex systems, involving the in vitro culture of cancer cells. Taken together, these results will shed light on the molecular mechanisms of cell membrane photo-oxidation, which is relevant not only for photodynamic therapy (PDT) applications but also for many other fields of life sciences and health. (AU)

Scientific publications

(7)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

PAZIN, WALLANCE MOREIRA; MARQUES RUIZ, GILIA CRISTINE; DOS SANTOS, MARCELO JOSE; BENITES AOKI, PEDRO HENRIQUE; ITO, AMANDO SIUITI; LEOPOLDO CONSTANTINO, CARLOS JOSE. The protective effect of Artepillin C against lipid oxidation on model membranes. JOURNAL OF MOLECULAR LIQUIDS, v. 324, FEB 15 2021. (16/09633-4, 18/22214-6, 18/16713-0)

MOREIRA, LUCAS G.; ALMEIDA JR, ALEXANDRE M.; NIELD, TYLER; CAMACHO, SABRINA A.; AOKI, PEDRO H. B.. Modulating photochemical reactions in Langmuir monolayers of Escherichia coli lipid extract with the binding mechanisms of eosin decyl ester and toluidine blue-O photosensitizers. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY, v. 218, MAY 2021. (20/15854-9, 18/16713-0, 18/22214-6, 18/14692-5)

MOREIRA, LUCAS G.; ALMEIDA JR, ALEXANDRE M.; CAMACHO, SABRINA A.; ESTEVAO, BIANCA M.; OLIVEIRA JR, OSVALDO N.; AOKI, PEDRO H. B.. Chain Cleavage of Bioinspired Bacterial Membranes Photoinduced by Eosin Decyl Ester. Langmuir, v. 36, n. 32, p. 9578-9585, AUG 18 2020. (18/22214-6, 18/14692-5, 13/14262-7, 18/13021-0, 18/16713-0)

ALMEIDA, JR., ALEXANDRE M.; OLIVEIRA, JR., OSVALDO N.; AOKI, PEDRO H. B.. Role of Toluidine Blue-O Binding Mechanism for Photooxidation in Bioinspired Bacterial Membranes. Langmuir, v. 35, n. 51, p. 16745-16751, DEC 24 2019. (13/14262-7, 18/16713-0)

CAMACHO, SABRINA A.; KOBAL, MIRELLA B.; MOREIRA, LUCAS G.; BISTAFFA, MARIA J.; ROQUE, THAMIRES C.; PAZIN, WALLANCE M.; TOLEDO, KARINA A.; OLIVEIRA JR, OSVALDO N.; AOKI, PEDRO H. B.. The efficiency of photothermal action of gold shell-isolated nanoparticles against tumor cells depends on membrane interactions. COLLOIDS AND SURFACES B-BIOINTERFACES, v. 211, MAR 2022. (18/14692-5, 18/16713-0, 20/12129-1, 20/15854-9, 14/11408-3, 17/03879-4, 18/22214-6)

BISTAFFA, MARIA J.; KOBAL, MIRELLA B.; SOUZA, PRISCILA S. S.; TOLEDO, KARINA A.; CAMACHO, SABRINA A.; AOKI, PEDRO H. B.. Photo-Induced Necrosis on Oropharyngeal Carcinoma (HEp-2) Cells Mediated by the Xanthene Erythrosine. Journal of Nanoscience and Nanotechnology, v. 20, n. 10, p. 6180-6190, OCT 2020. (13/14262-7, 16/20576-2, 18/14692-5, 18/16713-0)

BISTAFFA, MARIA J.; CAMACHO, SABRINA A.; MELO, CARLOS F. O. R.; CATHARINO, RODRIGO R.; TOLEDO, KARINA A.; AOKI, PEDRO H. B.. Plasma membrane permeabilization to explain erythrosine B phototoxicity on in vitro breast cancer cell models. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY, v. 223, OCT 2021. (18/14692-5, 13/14262-7, 16/20576-2, 18/16713-0)