Structure–Activity Relationships of 6- and 8‑Gingerol Analogs as Anti-Biofilm Agents

<i>Pseudomonas aeruginosa</i> is a causative agent of chronic infections in immunocompromised patients. Disruption of quorum sensing circuits is an attractive strategy for treating diseases associated with <i>P. aeruginosa</i> infection. In this study, we designed and synthesized a series of gingerol analogs targeting LasR, a master regulator of quorum sensing networks in <i>P. aeruginosa</i>. Structure–activity relationship studies showed that a hydrogen-bonding interaction in the head section, stereochemistry and rotational rigidity in the middle section, and optimal alkyl chain length in the tail section are important factors for the enhancement of LasR-binding affinity and for the inhibition of biofilm formation. The most potent compound <b>41</b>, an analog of (<i>R</i>)-8-gingerol with restricted rotation, showed stronger LasR-binding affinity and inhibition of biofilm formation than the known LasR antagonist (<i>S</i>)-6-gingerol. This new LasR antagonist can be used as an early lead compound for the development of anti-biofilm agents to treat <i>P. aeruginosa</i> infections

Structure–Activity Relationships of 6- and 8‑Gingerol Analogs as Anti-Biofilm Agents

<i>Pseudomonas aeruginosa</i> is a causative agent of chronic infections in immunocompromised patients. Disruption of quorum sensing circuits is an attractive strategy for treating diseases associated with <i>P. aeruginosa</i> infection. In this study, we designed and synthesized a series of gingerol analogs targeting LasR, a master regulator of quorum sensing networks in <i>P. aeruginosa</i>. Structure–activity relationship studies showed that a hydrogen-bonding interaction in the head section, stereochemistry and rotational rigidity in the middle section, and optimal alkyl chain length in the tail section are important factors for the enhancement of LasR-binding affinity and for the inhibition of biofilm formation. The most potent compound <b>41</b>, an analog of (<i>R</i>)-8-gingerol with restricted rotation, showed stronger LasR-binding affinity and inhibition of biofilm formation than the known LasR antagonist (<i>S</i>)-6-gingerol. This new LasR antagonist can be used as an early lead compound for the development of anti-biofilm agents to treat <i>P. aeruginosa</i> infections

Structure–Activity Relationships of 6- and 8‑Gingerol Analogs as Anti-Biofilm Agents

<i>Pseudomonas aeruginosa</i> is a causative agent of chronic infections in immunocompromised patients. Disruption of quorum sensing circuits is an attractive strategy for treating diseases associated with <i>P. aeruginosa</i> infection. In this study, we designed and synthesized a series of gingerol analogs targeting LasR, a master regulator of quorum sensing networks in <i>P. aeruginosa</i>. Structure–activity relationship studies showed that a hydrogen-bonding interaction in the head section, stereochemistry and rotational rigidity in the middle section, and optimal alkyl chain length in the tail section are important factors for the enhancement of LasR-binding affinity and for the inhibition of biofilm formation. The most potent compound <b>41</b>, an analog of (<i>R</i>)-8-gingerol with restricted rotation, showed stronger LasR-binding affinity and inhibition of biofilm formation than the known LasR antagonist (<i>S</i>)-6-gingerol. This new LasR antagonist can be used as an early lead compound for the development of anti-biofilm agents to treat <i>P. aeruginosa</i> infections

Colour and behavioural data, Activity level survey data, and predation experiments data file

Colour and behavioural data, Activity level survey data, and predation experiments data fil