Back

Berberine, the major bioactive compound from Berberis aristata, attenuates virulence of multidrug resistant Chromobacterium violaceum at non-lethal concentrations by targeting bacterial efflux and denitrification machinery

Thakkar, N.; Gajera, G.; Kothari, V.

2025-10-18 microbiology
10.1101/2025.10.17.683191 bioRxiv
Show abstract

Berberis aristata root extract, and berberine were assessed for their anti-pathogenic activity against multidrug resistant Chromobacterium violaceum. Berberine was found to be more potent than the parent extract with respect to attenuation of the pathogens virulence against the model host Caenorhabditis elegans. It also performed better than six different antibiotics, when compared at same concentration. Berberine was able to modulate multiple traits of the target pathogen, such as, biofilm formation, haemolytic activity, efflux/transport activity, and exopolysaccharide production. Repeated exposure of C. violaceum to berberine did not induce resistance. Whole transcriptome analysis of the berberine-treated C. violaceum revealed differential expression of genes associated with stress response, efflux, denitrification, and metalloproteases. Downregulation of two genes of the denitrification pathway, nirK and norB, was confirmed through RT-PCR too.

Matching journals

The top 8 journals account for 50% of the predicted probability mass.

50% of probability mass above

"Similar papers" are the closest papers from that journal in the model's embedding space. They show what the match is built on, but the ranking comes mostly from a classifier over the whole training set, not from these examples alone.