Linked Life Data

20339399

Source:http://linkedlifedata.com/resource/pubmed/id/20339399

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2010-5-28
pubmed:abstractText
The alarming rise of hospital- and community-associated methicillin-resistant Staphylococcus aureus (HA- and CA-MRSA) infections has prompted a desperate search for novel antibiotics. We discovered the streptogramin etamycin produced by an actinomycete species isolated from the coast of Fiji, the first time this antibiotic has been identified from a marine microbe. Etamycin was extracted and purified from this strain (CNS-575) and identified as a three-rotamer species by 2D NMR spectroscopy. Etamycin demonstrated potent activity against HA- and CA-MRSA in microbroth dilution assays, with minimum inhibitory concentrations (MIC) as low as 1-2 mg l(-1) against HA- and CA-MRSA strains. Furthermore, etamycin was also active against other Gram-positive and several Gram-negative pathogens and was found to be non-cytotoxic at concentrations more than 20-fold above MIC. Etamycin displayed favorable time-kill kinetics compared with the first-line MRSA antibiotic, vancomycin, and also conferred significant protection from mortality in a murine model of systemic lethal MRSA infection. These data emphasize the utility of the marine environment as a relatively untapped source of antibiotics against major drug-resistant human pathogens. These studies will also guide future isolation and preclinical development of depsipeptide anti-MRSA compounds from marine-derived actinomycetes.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0021-8820
pubmed:author
pubmed:issnType
Print
pubmed:volume
63
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
219-24
pubmed:dateRevised
2010-12-30
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
Activity of the streptogramin antibiotic etamycin against methicillin-resistant Staphylococcus aureus.
pubmed:affiliation
Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California-San Diego, La Jolla, CA, USA.
pubmed:publicationType
Journal Article, Research Support, N.I.H., Extramural