ELIZA

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299409 occurrences (No.76 in the rank) during 5 years in the PubMed. [cache]

337) Because many antibiotics target specific bacterial enzymes or reactions, corresponding genes may mutate under selection and lead to antibiotic resistance.

--- ABSTRACT ---

PMID:24345876 DOI:10.1177/1753425913514784

2015 Innate immunity

* Microbicidal effects of α- and θ-defensins against antibiotic-resistant Staphylococcus aureus and Pseudomonas aeruginosa.

- Antibiotic-resistant bacterial pathogens threaten public health. Because many antibiotics target specific bacterial enzymes or reactions, corresponding genes may mutate under selection and lead to antibiotic resistance. Accordingly, antimicrobials that selectively target overall microbial cell integrity may offer alternative approaches to therapeutic design. Naturally occurring mammalian α- and θ-defensins are potent, non-toxic microbicides that may be useful for treating infections by antibiotic-resistant pathogens because certain defensin peptides disrupt bacterial, but not mammalian, cell membranes. To test this concept, clinical isolates of methicillin-resistant Staphylococcus aureus (MRSA), including vancomycin heteroresistant strains, and ciprofloxacin-resistant Pseudomonas aeruginosa (Cip(R)-PA) were tested for sensitivity to α-defensins Crp-4, RMAD-4 and HNPs 1-3, and to RTD-1, macaque θ-defensin-1. In vitro, 3 μM Crp-4, RMAD-4 and RTD-1 reduced MRSA cell survival by 99%, regardless of vancomycin susceptibility. For PA clinical isolates that differ in fluoroquinolone resistance and virulence phenotype, peptide efficacy was independent of strain ciprofloxacin resistance, site of isolation or virulence factor expression. Thus, Crp-4, RMAD-4 and RTD-1 are effective in vitro antimicrobials against clinical isolates of MRSA and Cip(R)-PA, perhaps providing templates for development of α- and θ-defensin-based microbicides against antibiotic resistant or virulent infectious agents.

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(1)101 and	(12)8 including	(23)4 for	(34)2 13
(2)36 null	(13)7 encoding	(24)4 from	(35)2 but
(3)28 are	(14)7 involved	(25)4 related	(36)2 can
(4)26 were	(15)7 which	(26)4 with	(37)2 coding
(5)25 in	(16)6 (PCGs),	(27)3 had	(38)2 expressed
(6)16 2	(17)6 use	(28)3 have	(39)2 is
(7)14 (13	(18)5 may	(29)3 stop	(40)2 on
(8)14 22	(19)5 that	(30)3 such	(41)2 ranged
(9)12 start	(20)4 (PCGs)	(31)2 (cytb,	(42)2 to
(10)11 of	(21)4 as	(32)2 (pnad1
(11)9 was	(22)4 associated	(33)2 (srfAA,

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--- WordNet output for genes --- =>発生, 起源, 起こり, 生成, 創始, 創世記 Overview of noun gene The noun gene has 1 sense (no senses from tagged texts) 1. gene, cistron, factor -- ((genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as well as introns between the exons; it is considered a unit of heredity; "genes were formerly called factors") --- WordNet end ---