Does low intensity He-Ne laser radiation affect the intracellular pH of intact Escherichia coli cells?

1995 ◽  
Author(s):  
Terence I. Quickenden ◽  
Lillian L. L. Daniels ◽  
Lyndsay T. Byrne
Keyword(s):  
Escherichia Coli ◽  
Laser Radiation ◽  
Intracellular Ph ◽  
Low Intensity ◽  
Escherichia Coli Cells

Cooperative Response of Escherichia Coli Cells to the Resonance Effect of Millimeter Waves at Super Low Intensity

1994 ◽  
Vol 13 (1) ◽  
pp. 53-66 ◽  
Author(s):  
Igor Ya Belyaev ◽  
Yevgeny D. Alipov ◽  
Victor S. Shcheglov ◽  
Vladimir A. Polunin ◽  
Olga A. Aizenberg
Keyword(s):  
Escherichia Coli ◽  
Millimeter Waves ◽  
Resonance Effect ◽  
Low Intensity ◽  
Cooperative Response ◽  
Escherichia Coli Cells

scholarly journals Persister Escherichia coli Cells Have a Lower Intracellular pH than Susceptible Cells but Maintain Their pH in Response to Antibiotic Treatment

mBio ◽  
2021 ◽  
Author(s):  
Olivia Goode ◽  
Ashley Smith ◽  
Ashraf Zarkan ◽  
Jehangir Cama ◽  
Brandon M. Invergo ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Antimicrobial Resistance ◽  
Intracellular Ph ◽  
Antibiotic Treatment ◽  
Ph Regulation ◽  
Acid Stress ◽  
Environmental Stressors ◽  
Chronic Infections ◽  
Escherichia Coli Cells ◽  
Treatment Limitation

Persister and VBNC cells can phenotypically survive environmental stressors, such as antibiotic treatment, limitation of nutrients, and acid stress, and have been linked to chronic infections and antimicrobial resistance. It has recently been suggested that pH regulation might play a role in an organism’s phenotypic survival to antibiotics; however, this hypothesis remains to be tested.

Low intensity infrared laser induces filamentation in Escherichia coli cells

Laser Physics ◽  
2011 ◽  
Vol 21 (10) ◽  
pp. 1829-1837 ◽  
Author(s):  
A. S. Fonseca ◽  
G. A. Presta ◽  
M. Geller ◽  
F. Paoli
Keyword(s):  
Escherichia Coli ◽  
Infrared Laser ◽  
Low Intensity ◽  
Escherichia Coli Cells

scholarly journals Importance of Glutathione for Growth and Survival of Escherichia coli Cells: Detoxification of Methylglyoxal and Maintenance of Intracellular K+

1998 ◽  
Vol 180 (16) ◽  
pp. 4314-4318 ◽  
Author(s):  
G. P. Ferguson ◽  
I. R. Booth
Keyword(s):  
Escherichia Coli ◽  
Intracellular Ph ◽  
Parent Strain ◽  
Cytoplasmic Ph ◽  
Growth And Survival ◽  
E Coli ◽  
Enhanced Sensitivity ◽  
Escherichia Coli Cells ◽  
Highly Sensitive

ABSTRACT The role of the tripeptide glutathione in the growth and survival of Escherichia coli cells has been investigated. Glutathione-deficient mutants leak potassium and have a reduced cytoplasmic pH. These mutants are more sensitive to methylglyoxal than the parent strain, indicating that in the absence of glutathione-dependent detoxification, acidification of the cytoplasm cannot fully protect cells. However, increasing the intracellular pH of the glutathione-deficient strain resulted in enhanced sensitivity to methylglyoxal. This suggests that acidification of the cytoplasm can provide some protection to E. coli cells in the absence of glutathione. In the presence of the Kdp system, glutathione-deficient mutants are highly sensitive to methylglyoxal. This is due to the higher intracellular pH in these cells. In the absence of methylglyoxal, the presence of the Kdp system in a glutathione-deficient strain also leads to an extended lag upon dilution into fresh medium. These data highlight the importance of glutathione for the regulation of the K+ pool and survival of exposure to methylglyoxal.

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