Inhibition of lysosomal vacuolar proton pump down-regulates cellular acidification and enhances E. coli bactofection efficiency

Rasaq Olajide Akinsola, Choon Weng Lee, Edmund Ui Hang Sim, Kumaran Narayanan

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1 Citation (Scopus)


Endosomal escape is considered a crucial barrier that needs to be overcome by integrin-mediated E. coli for gene delivery into mammalian cells. Bafilomycin, a potent inhibitor of the H+ proton pump commonly employed to lower endosomal pH, was evaluated as part of the E. coli protocol during delivery. We found an increase in green fluorescent protein expression up 6.9, 3.2, 5.0, 2.8, and 4.5 fold in HeLa, HEK-293, A549, HT1080, and MCF-7 respectively, compared to untreated cells. Our result showed for the first time that Inhibition of lysosomal V-ATPase enhances E. coli efficiency.

Original languageEnglish
Article number114088
Number of pages3
JournalAnalytical Biochemistry
Publication statusPublished - 1 Mar 2021


  • Bacteria DNA delivery
  • Endocytosed
  • Endosome
  • Lysosome
  • Proton pump inhibitor
  • V-ATPase

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