Photothermal versus photodynamic treatment for the inactivation of the bacteria Escherichia coli and Bacillus cereus: An in vitro study

ElZorkany, Heba ElSayed; Youssef, Tareq; Mohamed, Mona; Amin, Rehab

doi:10.1016/j.pdpdt.2019.06.020

Cited by 25 publications

(11 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among the existing antibacterial strategies, photodynamic therapy (PDT), as a kind of photoinduced therapy, has attracted great interest of researchers for its high efficiency, low toxicity, non-invasiveness, and potential to overcome drug resistance. , The eradication of bacteria through PDT holds a special place as an alternative to antibiotics. Since the early 1990s, PDT has been reported as an alternative therapy or a supplement to antimicrobials .…”

Section: Introductionmentioning

confidence: 99%

pH-Responsive Oxygen and Hydrogen Peroxide Self-Supplying Nanosystem for Photodynamic and Chemodynamic Therapy of Wound Infection

Sun

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

The combination of photodynamic therapy (PDT) and chemodynamic therapy (CDT) has been continuously explored in the antibacterial aspect and has achieved more effective antibacterial effect than a single therapy. We design a pH-responsive O 2 and H 2 O 2 self-supplying zeolitic imidazolate framework-67 (ZIF-67) nanosystem for PDT/CDT of wound infection. Under the acidic inflammatory conditions, ZIF-67 can degrade to produce Co 2+ and release CaO 2 and graphene quantum dots (GQDs). The exposed CaO 2 reacted with water to generate H 2 O 2 and O 2 . The self-supplied O 2 alleviates hypoxia at the site of inflammation and enhances external light-initiated GQD-mediated PDT, while H 2 O 2 was catalyzed by endogenous Co 2+ to produce hydroxyl radicals for Co 2+ -triggered CDT. In vitro and in vivo experiments confirm that CaO 2 /GQDs@ZIF-67 has a combined PDT/ CDT effect. The antibacterial mechanism indicates that bacteria post-treated with CaO 2 /GQDs@ZIF-67 may be sterilized by reactive oxygen species-mediated oxidative stress and the leakage of bacterial contents. The experiments also find that CaO 2 /GQDs@ZIF-67 may activate the immune response and enhance the therapeutic effect by activating the cyclic GMP− AMP synthase−stimulator of interferon genes signaling pathway.

show abstract

Section: Introductionmentioning

confidence: 99%

pH-Responsive Oxygen and Hydrogen Peroxide Self-Supplying Nanosystem for Photodynamic and Chemodynamic Therapy of Wound Infection

Sun

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…12 Photodynamic effects using appropriate photosensitizers could strongly enhance laser bactericidal activity. 13 CONCLUSION Laser energy deposited inside the cells increases with increasing repletion rate and irradiation time. This will increase the lethal effects of green laser by triggering intracellular mechanisms that interfere with the normal metabolic pathways leading to growth arrest.…”

Section: Discussionmentioning

confidence: 99%

Eff ect of Different Laser Irradiation Parameters on the Viability of Bacillus Species

Naji¹,

Mohseen²,

AL-Daher³

2023

IJDDT

View full text Add to dashboard Cite

The genus Bacillus is present everywhere in the environment, it has environmental, industrial, and medical signifi cance. This heterogeneous group of bacteria shares unique characteristics, one of these is the resistance to physical and chemical agents. Laser light is one of the most interesting physical agents with a wide range of applications in all scientifi c fi elds. It has the ability to alter bacterial growth by triggering inhibitory or stimulatory mechanisms. In this study, laser parameters were varied to evaluate the eff ect of each one on the viability of Bacillus species. CW or chopped (532 nm) laser light at diff erent irradiation periods were examined. Results showed that tested bacterial species’ response to green laser light varied. Bacterial viability was dropped with increasing chopping frequency and exposure time. In conclusion, high repetition rate and prolonged exposure time increase the lethal eff ects of this type of laser

show abstract

“…Recently, joint application of PDT and PTT is a useful tool for bacterial eradication, especially multi-drug resistant (MDR) bacteria. 61 Giza et al propose that Toluidine blue O (TBO) and GNP were used to kill bacteria. 62…”

Section: Progress In the Field Of Oncologymentioning

confidence: 99%

<p>Pathological Mechanism of Photodynamic Therapy and Photothermal Therapy Based on Nanoparticles</p>

Hou

Yang

Liu

et al. 2020

IJN

242

View full text Add to dashboard Cite

The ultimate goal of phototherapy based on nanoparticles, such as photothermal therapy (PTT) which generates heat and photodynamic therapy (PDT) which not only generates reactive oxygen species (ROS) but also induces a variety of anti-tumor immunity, is to kill tumors. In addition, due to strong efficacy in clinical treatment with minimal invasion and negligible side effects, it has received extensive attention and research in recent years. In this paper, the generations of nanomaterials in PTT and PDT are described separately. In clinical application, according to the different combination pathway of nanoparticles, it can be used to treat different diseases such as tumors, melanoma, rheumatoid and so on. In this paper, the mechanism of pathological treatment is described in detail in terms of inducing apoptosis of cancer cells by ROS produced by PDT, immunogenic cell death to provoke the maturation of dendritic cells, which in turn activate production of CD4+ T cells, CD8+T cells and memory T cells, as well as inhibiting heat shock protein (HSPs), STAT3 signal pathway and so on.

show abstract

Photothermal versus photodynamic treatment for the inactivation of the bacteria Escherichia coli and Bacillus cereus: An in vitro study

Cited by 25 publications

References 48 publications

pH-Responsive Oxygen and Hydrogen Peroxide Self-Supplying Nanosystem for Photodynamic and Chemodynamic Therapy of Wound Infection

pH-Responsive Oxygen and Hydrogen Peroxide Self-Supplying Nanosystem for Photodynamic and Chemodynamic Therapy of Wound Infection

Eff ect of Different Laser Irradiation Parameters on the Viability of Bacillus Species

<p>Pathological Mechanism of Photodynamic Therapy and Photothermal Therapy Based on Nanoparticles</p>

Contact Info

Product

Resources

About