Several analogs exhibited single digit μM activity against drug resistant bacteria including; multiple drug resistant Mycobacterium tuberculosis, extremely drug resistant Mycobacterium tuberculosis and MRSA.
Tigecycline, a first-in-class, expanded broad-spectrum glycylcycline, demonstrates in vitro activity against many commonly encountered respiratory bacteria, including multiple resistant gram-positive, gram-negative, anaerobic, and "atypical" bacteria such as multidrug-resistant S. pneumoniae and beta-lactamase producing H. influenzae [ 15].
We chose to capture and express the putative biosynthetic pathway for a group of lipopeptides exemplified by bromoalterochromide A (2). Produced by multiple species of Pseudoalteromonas bacteria, including P. piscicida JCM 20779, the "alterochromides" possess unusual chemical structural features, such as a brominated lipid moiety, in addition to their antibacterial and cytotoxic properties.
Analysis of the promotors of LPS-responsive genes that were perturbed by Type A Francisella infection identified candidate transcription factors that were potentially modulated by the bacteria, including multiple members of the forkhead transcription factor family (FoxA1, Foxa2, FoxD1, Foxd3, Foxf2, FoxI1, Fox03, Foxq1), IRF1, CEBPA, and Mef2.
The type III secretion system (T3SS) is employed to deliver effector proteins to the cytosol of eukaryotic hosts by multiple species of Gram-negative bacteria, including Pseudomonas aeruginosa.
This impaired vascular contractility is independent of the endothelium (Julou-Schaeffer et al., 1990; Szabo et al., 1993) and associated specifically with the induction of NOSII in the VSM component of blood vessels (Bishop-Bailey et al., 1997) In vivo, the host is exposed to multiple ligands derived from Gram-negative bacteria, including both NOD1 and TLR4 agonists.
Patients with nosocomial pneumonia caused by multiple bacteria were included in the study.
Type IV pili (TFP) are bacterial filaments typically composed of repeating monomers (reviewed by Pelicic [ 98]), which are known to have multiple functions in Gram-negative and Gram-positive bacteria including motility [ 99, 100] and biofilm formation [ 101, 102].
Multiple reports indicate that the presence of these genes among different bacteria including E.coli [ 39] and Aeromonas [ 40].
In fact, in the context of bacterial infections, multiple TLRs are likely to be activated by distinct ligands associated with bacteria, including peptidoglycans, flagellin, lipopolysaccharides, DNA and RNA.
