Article
Chemistry, Physical
Qian Wang, Dandan Zhang, Jin Feng, Tingli Sun, Cailing Li, Xiaobao Xie, Qingshan Shi
Summary: In this study, a chlorine-loaded polyethyleneimine-based micelle photosensitizer was constructed for enhanced photoinactivation activities on Gram-negative bacteria through electrostatic and hydrophobic interactions between nanoparticles and the bacterial surface. The light-triggered generation of reactive oxygen species caused irreversible damage to the bacterial outer membrane, achieving enhanced bactericidal efficiency. This antimicrobial alternative holds great potential for human healthcare and environmental remediation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Tiffany Ho, Keegan Guidolin, Ali Makky, Michael Valic, Lili Ding, Jiachuan Bu, Mark Zheng, Miffy H. Y. Cheng, Jeremy Yau, Juan Chen, Gang Zheng
Summary: The inclusion of aminopolycarboxylic acid conjugated lipids in liposome-like porphyrin nanoparticles enhanced their intracellular uptake by 25-fold. This new uptake strategy, which fluidizes the cell membrane, improves photodynamic therapy cell killing and tumor delineation. It offers a potential solution to challenges in conventional drug delivery.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Infectious Diseases
Sofia C. Santamarina, Daniel A. Heredia, Andres M. Durantini, Edgardo N. Durantini
Summary: The widespread use of antibiotics has led to an increase in microbial resistance, necessitating the development of new strategies to combat pathogens. Photoactive polymers offer an interesting approach to kill microbes and maintain aseptic surfaces.
Article
Polymer Science
Milena B. Boarini, Natalia S. Gsponer, Maria E. Milanesio, Edgardo N. Durantini
Summary: This study synthesized two novel polymeric conjugates that exhibited significant photodynamic effects and tested their photoinactivation abilities against Staphylococcus aureus and Escherichia coli.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Polymer Science
Merlyn M. Thandu, Giada Rossi, Daniele Goi, Paolo Guerriero, Denise Poletti, Paolo Strazzolini, Clara Comuzzi
Summary: The synthesis, chemical, and biological characterization of composite polyvinyl chloride (PVC)-based materials for photodynamic inactivation of pathogen microorganisms were investigated. The addition of plasticizers to the polymer/photosensitizer mixture was found to be essential in transforming PVC into a photoactive material with bactericidal properties, with long-chain linear adipates showing more efficiency in imparting desired bactericidal activity.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Polymer Science
Sofia C. Santamarina, Daniel A. Heredia, Andres M. Durantini, Edgardo N. Durantini
Summary: The emergence of antibiotic-resistant microbes necessitates the development of alternative therapies. In this study, two polymers were synthesized and found to possess strong antibacterial activity, particularly in the presence of potassium iodide, inhibiting the growth of Staphylococcus aureus.
Article
Biology
Annette R. Rowe, Farshid Salimijazi, Leah Trutschel, Joshua Sackett, Oluwakemi Adesina, Isao Anzai, Liat H. Kugelmass, Michael H. Baym, Buz Barstow
Summary: Extracellular electron transfer (EET) enables microbial electron uptake for the synthesis of complex organic molecules, but there are significant gaps in understanding the mechanism and genetics of electron uptake.
COMMUNICATIONS BIOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Mirella R. V. Bertolo, Lucas D. Dias, Alessandra R. Lima, Antonio S. N. Aguiar, Fernanda Alves, Mariana de Souza, Hamilton B. Napolitano, Vanderlei S. Bagnato, Stanislau Bogusz Jr
Summary: This study investigated the application of biopolymeric materials and antimicrobial photodynamic therapy (aPDT) on the safety of strawberries. The materials showed potential as photosensitizers and effectively reduced the survival of Staphylococcus aureus on the surface of the films. The materials were also shown to be safe for use as films without posing a risk to humans and the environment. The photoactive coatings on strawberries maintained their weight and effectively delayed fungal contamination. The antimicrobial effects of aPDT combined with the photoactive coatings were enhanced, while the quality of the strawberries was maintained.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Multidisciplinary Sciences
Sean A. MacIsaac, Kyle D. Rauch, Taylor Prest, Richard M. Simons, Graham A. Gagnon, Amina K. Stoddart
Summary: Ultraviolet (UV) disinfection technology, although widely used in water treatment, has negative environmental consequences. UV LEDs offer a climate responsive and improved solution by outperforming conventional low pressure (LP) systems at bench-scale. This study proves that UV LED reactors are expected to have lower energy consumption compared to LP systems by 2025 by providing a 24.6% and 43.4% reduction in power consumption for the 30 and 40 mJ cm(-2) scenarios, respectively.
SCIENTIFIC REPORTS
(2023)
Article
Polymer Science
Fan Wang, Ronghan Wang, Yingjie Pan, Ming Du, Yong Zhao, Haiquan Liu
Summary: In this study, gelatin/chitosan-based functional films with photodynamic inactivation (PDI) potency were prepared by incorporating curcumin as a photosensitizer. The results showed that the addition of curcumin improved the film characteristics and when present at a certain concentration, it effectively inactivated foodborne pathogenic bacteria. This offers a promising option for the preparation of food packaging films.
Article
Microbiology
Sueden O. Souza, Bruno L. Raposo, Jose F. Sarmento-Neto, Julio S. Reboucas, Danielle P. C. Macedo, Regina C. B. Q. Figueiredo, Beate S. Santos, Anderson Z. Freitas, Paulo E. Cabral Filho, Martha S. Ribeiro, Adriana Fontes
Summary: The study found that the tetracationic metalloporphyrin Zn(II) meso-tetrakis(N-n-hexylpyridinium-2-yl)porphyrin is a promising photosensitizer for antimicrobial photodynamic inactivation of Candida albicans. The results demonstrated effective eradication of yeast and biofilm forms of C. albicans with minimal toxicity to mammalian cells.
Article
Biochemistry & Molecular Biology
Linyue Su, Jiaming Huang, Huihui Li, Yingjie Pan, Beiwei Zhu, Yong Zhao, Haiquan Liu
Summary: The study successfully applied Photodynamic Inactivation (PDI) technology to food packaging using chitosan films containing riboflavin, resulting in composite films with improved properties. The addition of riboflavin not only enhanced the film characteristics, but also generated sufficient singlet oxygen to inactivate food-borne pathogens and spoilage bacteria.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Biographical-Item
Biotechnology & Applied Microbiology
Gerd P. Pfeifer, Judith Singer-Sam, Keiichi Itakura
Summary: Arthur Riggs, a world-renowned diabetes expert and molecular biologist, played a pioneering role in the development of life-saving recombinant protein and antibody drugs that formed the foundation of the biotech industry.
NATURE BIOTECHNOLOGY
(2022)
Article
Chemistry, Analytical
Fan-Lin Meng, Hai-Long Qian, Xiu-Ping Yan
Summary: This study demonstrates a conjugation-regulating strategy for designing and synthesizing Por-COFs with high photosensitizing activity for photodynamic inactivation of bacteria. By optimizing conjugation degree, the conjugation of DhaTph and JNU-2 is enhanced, leading to the increase of intersystem crossing process and significant improvement in photosensitizing activity towards bacteria.
Article
Chemistry, Inorganic & Nuclear
Masoud Moradi, Azra Naderi, Niloufar Bahari, Motahareh Harati, Jorge Rodriguez-Chueca, Roshanak Rezaei Kalantary
Summary: The study found that TiO2NP can effectively photocatalytically inactivate E. coli. Operational parameters such as pH, aeration, inorganic ions, and organic matter content have an impact on bacterial inactivation. TiO2NP has better disinfection effect than other catalysts.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Review
Polymer Science
Maria Lorena Gomez, Antonela Gallastegui, Mariana B. Spesia, Hernan A. Montejano, Roberto J. Williams, Carlos M. Previtali
POLYMERS FOR ADVANCED TECHNOLOGIES
(2017)
Article
Chemistry, Medicinal
Maximiliano L. Agazzi, M. Belen Ballatore, Eugenia Reynoso, Ezequiel D. Quiroga, Edgardo N. Durantini
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
(2017)
Article
Polymer Science
Tomas Tempesti, M. Gabriela Alvarez, Cesar Gomez, Miriam Strumia, Edgardo N. Durantini
POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING
(2018)
Article
Chemistry, Multidisciplinary
Daniel A. Heredia, Andres M. Durantini, Ariel M. Sarotti, Natalia S. Gsponer, Dario D. Ferreyra, Sonia G. Bertolotti, Maria E. Milanesio, Edgardo N. Durantini
CHEMISTRY-A EUROPEAN JOURNAL
(2018)
Review
Chemistry, Medicinal
Andres M. Durantini, Daniel A. Heredia, Javier E. Durantini, Edgardo N. Durantini
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
(2018)
Article
Chemistry, Multidisciplinary
M. Belen Ballatore, Mariana B. Spesia, M. Elisa Milanesio, Edgardo N. Durantini
Article
Dermatology
Eugenia Reynoso, Dario D. Ferreyra, Edgardo N. Durantini, Mariana B. Spesia
PHOTODERMATOLOGY PHOTOIMMUNOLOGY & PHOTOMEDICINE
(2019)
Article
Materials Science, Biomaterials
Antonela Gallastegui, Mariana B. Spesia, Ignacio E. dell'Erba, Carlos A. Chesta, Carlos M. Previtali, Rodrigo E. Palacios, Maria Lorena Gomez
MATERIALS SCIENCE AND ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
(2019)
Article
Chemistry, Medicinal
Sol R. Martinez, Luis E. Ibarra, Rodrigo A. Ponzio, Maria V. Forcone, Ana B. Wendel, Carlos A. Chesta, Mariana B. Spesia, Rodrigo E. Palacios
ACS INFECTIOUS DISEASES
(2020)
Article
Chemistry, Applied
Rocio Casadey, Cecilia Challier, Marcela Altamirano, Mariana B. Spesia, Susana Criado
Summary: The main causes of food spoilage are oxidation processes and microbial contamination. Adding preservatives is a common technique used in the food industry to increase shelf life. Research shows that tyrosol and its isomers have potential antioxidant and antimicrobial properties, which can synergistically enhance the effects of commercial antioxidants.
Review
Chemistry, Multidisciplinary
Mariana B. Spesia, Edgardo N. Durantini
Summary: Phthalocyanine derivatives can act as photosensitizers for the treatment of microbial infections. By modifying the structure and substituents of phthalocyanines, the interaction with microorganisms and photodynamic inactivation can be enhanced. Phthalocyanines have strong absorption and emit red fluorescence in the phototherapeutic window, and they efficiently generate reactive oxygen species to eliminate microbes.
Article
Biochemistry & Molecular Biology
Maria E. Perez, Javier E. Durantini, Eugenia Reynoso, Maria G. Alvarez, Maria E. Milanesio, Edgardo N. Durantini
Summary: New porphyrin-Schiff base conjugates containing one (6) and two (7) basic amino groups were synthesized, allowing easier access to porphyrins substituted with positive charge precursor groups in aqueous media. These compounds showed red fluorescence emission and were able to photo-oxidize amino acids, with enhanced photodynamic inactivation capacity when combined with iodide anions. The presence of basic aliphatic amino groups in these porphyrins provided an amphiphilic character, improving their interaction with cell walls and photocytotoxic activity against microorganisms.
Article
Infectious Diseases
Sofia C. Santamarina, Daniel A. Heredia, Andres M. Durantini, Edgardo N. Durantini
Summary: The widespread use of antibiotics has led to an increase in microbial resistance, necessitating the development of new strategies to combat pathogens. Photoactive polymers offer an interesting approach to kill microbes and maintain aseptic surfaces.
Article
Biochemistry & Molecular Biology
Mariana B. Spesia, Edgardo N. Durantini
Summary: This study analyzes the photodynamic effect of combining photosensitizers on two different bacterial models and growth modes. The simultaneous administration of photosensitizers from different families showed improved inactivation compared to individual use. The effectiveness of the photosensitizer combinations varied depending on the type of bacteria and growth mode. The combination of three photosensitizers completely inhibited Escherichia coli growth under optimal nutritional conditions. This research represents a starting point for further investigation into the enhanced photodynamic inactivation through the combined use of photosensitizers.
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
(2023)
Article
Electrochemistry
Claudia Solis, M. Belen Ballatore, Maria B. Suarez, Maria Elisa Milanesio, Edgardo N. Durantini, Marisa Santo, Thomas Dittrich, Luis Otero, Miguel Gervaldo
ELECTROCHIMICA ACTA
(2017)