Related Experiment Video

Updated: Jan 24, 2026

LED-Based In Vitro Screening for Assessing Photoactivable Molecules in Bacterial Photodynamic Inactivation
05:13

LED-Based In Vitro Screening for Assessing Photoactivable Molecules in Bacterial Photodynamic Inactivation

Published on: January 24, 2025

765

Porphyrinoid photosensitizers mediated photodynamic inactivation against bacteria

Lukasz Sobotta1, Paulina Skupin-Mrugalska1, Jaroslaw Piskorz1

  • 1Department of Inorganic and Analytical Chemistry, Poznan University of Medical Sciences, Grunwaldzka 6, 60-780 Poznan, Poland.

European Journal of Medicinal Chemistry
|May 17, 2019
PubMed

Insights

Photodynamic antimicrobial chemotherapy offers a promising strategy against multi-drug resistant bacteria, a growing global health threat. This approach utilizes photosensitizers, oxygen, and light to combat infections, offering an alternative to traditional antibiotics.

Area of Science:

  • Microbiology
  • Photochemistry
  • Antimicrobial Therapy

Background:

  • The rise of multi-drug resistant (MDR) bacteria, including methicillin-resistant Staphylococcus aureus (MRSA) and carbapenem-resistant Pseudomonas aeruginosa, necessitates novel therapeutic strategies.
  • The increasing prevalence of infections caused by MDR pathogens has led to the concept of a "post-antibiotic era."
  • Traditional antibiotic treatments are becoming less effective against a growing number of resistant bacterial strains.

Purpose of the Study:

  • To provide a comprehensive review of photodynamic antimicrobial chemotherapy (PACT) for treating bacterial infections.
  • To explore the potential of porphyrinoid-based photosensitizers in PACT.
  • To elucidate the mechanisms of photodynamic action and bacterial resistance to PACT.

Main Methods:

  • Review of existing literature on photodynamic antimicrobial chemotherapy and porphyrinoid photosensitizers.
  • Analysis of the mechanisms underlying photodynamic inactivation of bacteria.
  • Description of various porphyrinoid compounds, including porphyrins, chlorins, and phthalocyanines, for their application in PACT.

Main Results:

  • PACT involves the interaction of a photosensitizer, molecular oxygen, and light to generate reactive oxygen species that kill bacteria.
  • Bacterial resistance mechanisms to photodynamic techniques have been identified and described.
  • Porphyrinoids such as porphyrins, chlorins, and phthalocyanines are effective photosensitizers for photodynamic bacteria inactivation.

Conclusions:

  • Photodynamic antimicrobial chemotherapy presents a viable alternative strategy for combating multi-drug resistant bacterial infections.
  • Porphyrinoid photosensitizers demonstrate significant potential for use in PACT protocols.
  • Further research into PACT mechanisms and photosensitizer development is crucial for clinical translation.
Keywords:
Bacteria photoinactivationPACTPhotodynamic therapyPhotosensitizer

More Related Videos

Photodynamic Therapy with Blended Conducting Polymer/Fullerene Nanoparticle Photosensitizers09:45

Photodynamic Therapy with Blended Conducting Polymer/Fullerene Nanoparticle Photosensitizers

Published on: October 28, 2015

8.9K
Author Spotlight: Exploring Photodynamic Therapy with Curcumin in a Murine Model for Oral Candidiasis06:39

Author Spotlight: Exploring Photodynamic Therapy with Curcumin in a Murine Model for Oral Candidiasis

Published on: October 27, 2023

1.4K

Related Concept Videos

X-Inactivation01:58

X-Inactivation

The human X chromosome contains over ten times the number of genes as in the Y chromosome. Since males have only one X chromosome, and females have two, one might expect females to produce twice as many of the proteins, with undesirable results.
41.7K
Activation and Inactivation of G Proteins01:22

Activation and Inactivation of G Proteins

Heterotrimeric G proteins are guanine nucleotide-binding proteins. As the name suggests, heterotrimeric G proteins are composed of three subunits: alpha, beta, and gamma. They remain GDP-bound or GTP-bound inside the cells and switch between inactive/active states. The Gα subunit possesses the nucleotide-binding pocket that binds guanine nucleotides and switches between GDP or GTP-bound states. In contrast, the Gꞵ and Gγ subunits are always bound together with high...
11.3K
Receptor-mediated Endocytosis01:39

Receptor-mediated Endocytosis

Overview
110.7K
The Tree of Life - Bacteria, Archaea, Eukaryotes02:40

The Tree of Life - Bacteria, Archaea, Eukaryotes

The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both...
38.1K
Other Unique Bacteria01:18

Other Unique Bacteria

Magnetic bacteria exhibit a directed movement called magnetotaxis, driven by structures called magnetosomes. These magnetosomes consist of chains of magnetic particles made of either magnetite (Fe₃O₄) or greigite (Fe₃S₄) and are organized in a linear conformation by a protein scaffold within invaginations of the cell membrane. The bacteria align along the north–south magnetic field lines, much like a compass needle. They are typically microaerophilic or anaerobic...
427
The Roles of Bacteria and Fungi in Plant Nutrition02:11

The Roles of Bacteria and Fungi in Plant Nutrition

Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
47.2K