S J Projan

..Coupled with the failure of large investments into target-based approaches to produce novel antibacterial agents, companies large and small have exited from this field despite a growing clinical need...

..In this case, Staphylococcus aureus possesses "weapons of mass destruction" and appears to be using them effectively as part of anti-immunization insurgency...

..coli or yeast gene products in these systems has been shown to be growth inhibitory, and therefore these clones are underrepresented (or completely lost) in the amplified library...

..Targeting multidrug efflux pumps may be more edifying in the long run...

..Therefore, a clear and urgent need for finding ways to improve the level and quality of industrial research in this area is apparent...

..Whereas many of these may successfully deal with resistant strains of Gram-positive pathogens, there is very little in development to address the gorwing unmet medical need of multi-drug resistant Gram-negative infections...

..g., in oncology). As each aspect of protein pharmaceutical technology advances, it is clear that this will be the major area for growth in the industry over the next decade...

..pneumoniae when a high level of the ACT-1 beta-lactamase is produced in combination with the loss of a major outer membrane protein...

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..These included piperacillin-tazobactam (which is currently the injectable antibiotic with the largest volume of sales worldwide) and daptomycin. This article focuses on the discovery and development of tigecycline...

..These data suggest that tigecycline and daptomycin may offer therapeutic options against clinically relevant resistant pathogens for which current alternatives for treatment are limited...

..This observation serves as a likely mechanism of the increased vancomycin susceptibility associated with mprF inactivation...

..The combination of piperacillin-BLI-489 also demonstrated improved activity compared to that of piperacillin-tazobactam against the problematic extended-spectrum beta-lactamase- and AmpC-expressing strains...

..These results and those of additional experiments presented in this study further suggest that lipid II indeed serves as a natural substrate in a sorting reaction...

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..These results suggest that the overexpression of mepA but not tet(M) may contribute to decreased susceptibility of tigecycline in S. aureus...

..The preferentially formed monofunctionalized 4,6-acetals and -ketals display potent antibacterial activities against Gram-positive microorganisms, including MRSA, PRSP, and VRE pathogens...

..The AcrAB transport system appears to be associated with the intrinsic reduced susceptibility to tigecycline in P. mirabilis...

..This suggests that glycylcyclines, although they are subject to efflux from P. aeruginosa, are generally inferior substrates for P. aeruginosa efflux pumps than are narrower-spectrum tetracyclines...

..The role that the surface proteins anchored by the srtA and srtB gene products play in the ability of Staphylococcus aureus bacteria to establish infection was investigated in several animal models...

..aureus strains and may play a major role in epidemiological studies in the future where correlating genes with particular disease phenotypes is critical...

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..This novel SHV-type extended-spectrum beta-lactamase is designated SHV-7...

..aureus stress response-dependent alterations in transcript abundances can, in part, be attributed to alterations in RNA stability. This phenomenon was not observed within SOS-responsive cells...

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..The results of this study define the CidR regulon and demonstrate that the generation of acetoin is linked to the control of cell death and lysis in S. aureus...

..Based on the importance of the S. aureus agr RNA molecule, RNAIII, and small stable RNA molecules within other pathogens, it is possible that these RNA molecules influence biological processes within the organism...

..The fact that a large number of genes are regulated by mgrA implies that MgrA is a major global regulator in S. aureus...

..Comparative genomics between USA300-0114 and three other S. aureus lineages (USA100, USA400, and USA500) defined a set of USA300-0114-specific genes, which may facilitate the strain's pathogenesis within diverse environments...

..In contrast, RN6390, NCTC 8325, and COL formed a distinct cluster that, by comparison to the other four sequenced strains (Mu50, N315, MW2, and SANGER-476), was the most distantly related to the UAMS isolates and EMRSA-16...

..Key results are verified by gene fusion and Northern blot hybridization analyses. The results point to, but do not define, possible regulatory pathways by which the organism senses and responds to a pH stimulus...

..A primary theme that emerged from the analysis of these genes is that persistence within a biofilm requires an adaptive response that limits the deleterious effects of the reduced pH associated with anaerobic growth conditions...

..The fact that tigecycline overcomes most of the known tetracycline resistance mechanisms is interpreted as a result of steric hindrance due to the large substituent at position 9...

..Recurrent VRE infections occur as a consequence of prolonged gastrointestinal colonization. Morbidity is associated with host factors, the presence of co-pathogens, and possibly intrinsically more virulent VRE strain...