Effects of sublethal UVA irradiation on activity levels of oxidative defense enzymes and protein oxidation in Escherichia coli

Hoerter, James D.; Arnold, Alan A.; Kuczynska, Dorota A.; Shibuya, Akemi; Ward, Christopher; Sauer, Michael; Gizachew, Admasu; Hotchkiss, Timothy; Fleming, Todd J.; Johnson, Steve

doi:10.1016/j.jphotobiol.2005.07.005

Cited by 89 publications

(53 citation statements)

References 33 publications

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“…conditions which have previously generated an ROS-stimulated response in bacteria. 33 Flasks were agitated after 20 min UV-A exposure to prevent the depletion of oxygen within the media and re-distribute bacteria. The temperature within T25 flasks was continuously monitored to ensure no excessive thermal accumulation was caused by UV-A treatment and that temperatures did not rise >27°C.…”

Section: Experimental and Control Treatmentsmentioning

confidence: 99%

Mid-infrared spectroscopic assessment of nanotoxicity in Gram-negative vs. Gram-positive bacteria

Heys

Riding

Strong

et al. 2014

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Vibrational spectroscopy provides a spectral fingerprint identifying the effects of carbonbased nanoparticles in bacterial cells. 3 ABSTRACTNanoparticles appear to induce toxic effects through a variety of mechanisms including generation of reactive oxygen species (ROS), physical contact with the cell membrane and indirect catalysis due to remnants from manufacture. The development and subsequent increasing usage of nanomaterials has highlighted a growing need to characterize and assess the toxicity of nanoparticles, particularly those that may have detrimental health effects such as carbon-based nanomaterials (CBNs). Due to interactions of nanoparticles with some reagents, many traditional toxicity tests are unsuitable for use with CBNs. Infrared (IR) spectroscopy is a non-destructive, high throughput technique, which is unhindered by such problems. We explored the application of IR spectroscopy to investigate the effects of CBNs on Gram-negative (Pseudomonas fluorescens) and Gram-positive (Mycobacterium vanbaalenii PYR-1) bacteria. Two types of IR spectroscopy were compared: attenuated total reflection Fourier-transform infrared (ATR-FTIR) and synchrotron radiation-based FTIR (SR-FTIR) spectroscopy. This showed that Gram-positive and Gram-negative bacteria exhibit differing alterations when exposed to CBNs. Gram-positive bacteria appear more resistant to these agents and this may be due to the protection afforded by their more sturdy cell wall. Markers of exposure also vary according to Gram status; Amide II was consistently altered in Gram-negative bacteria and carbohydrate altered in Gram-positive bacteria. ATR-FTIR and SR-FTIR spectroscopy could both be applied to extract biochemical alterations induced by each CBN that were consistent across the two bacterial species; these may represent potential biomarkers of nanoparticle-induced alterations. Vibrational spectroscopy approaches may provide a novel means of fingerprinting the effects of CBNs in target cells.

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Section: Experimental and Control Treatmentsmentioning

confidence: 99%

Mid-infrared spectroscopic assessment of nanotoxicity in Gram-negative vs. Gram-positive bacteria

Heys

Riding

Strong

et al. 2014

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“…However, it has been reported that in other bacteria, Fur is involved in regulation of rpoS expression from a 70 -type promoter (39,40). Recent DNA binding data imply a direct role of BosR in activation of the rpoS transcription through binding in the vicinity of the 54 -type promoter of rpoS (41).…”

Section: ϫ12mentioning

confidence: 99%

Manganese and Zinc Regulate Virulence Determinants in Borrelia burgdorferi

Troxell

Yang

et al. 2013

Infect Immun

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“…According to Gerba et al (1975), Land application of manure may affect the spead of antibiotic resistant bacteria through the way manure is applied into soils. Surface application is likely to be the most efficient method in managing pathogens and resistant bacteria due to desiccation when manure is exposed to ultraviolet solar radiation (Hoerter et al, 2005). Injection method is preferred from the nutrient management standpoint, but this method transfers bacteria and resistant genes directly into the soils and increases bacteria sorption to soil particles (Unc and Goss, 2004) and survival.…”

Section: Transport Of Antibiotics Resistant Bacteria Into Soil and Watermentioning

confidence: 99%

Occurrence of Tylosin-Resistant Enterococci in Swine Manure and Tile Drainage Systems under No-Till Management

Hoang

Soupir

Liu

et al. 2013

Water Air Soil Pollut

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Effects of sublethal UVA irradiation on activity levels of oxidative defense enzymes and protein oxidation in Escherichia coli

Cited by 89 publications

References 33 publications

Mid-infrared spectroscopic assessment of nanotoxicity in Gram-negative vs. Gram-positive bacteria

Mid-infrared spectroscopic assessment of nanotoxicity in Gram-negative vs. Gram-positive bacteria

Manganese and Zinc Regulate Virulence Determinants in Borrelia burgdorferi

Occurrence of Tylosin-Resistant Enterococci in Swine Manure and Tile Drainage Systems under No-Till Management

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