Document Detail

Effect of soluble maillard reaction products on cadA expression in Salmonella typhimurium.
MedLine Citation:
PMID:  20390946     Owner:  NLM     Status:  MEDLINE    
The presence of Maillard reaction products (MRP) in foods and food components is due to the non-enzymatic reaction between protein and carbohydrate residues triggered by thermal steps during food processing. The objective of this study was to assess the effect of MRPs and increasing lysine concentrations on S. Typhimurium growth and the expression of cadA which may be an indirect determinant of Salmonella virulence response. Variations in lysine concentrations (from 0 to 0.5 mM) did not exert any effect either on the final optical density after 6-hour incubation or the growth rates of S. Typhimurium in media containing MRPs. In contrast to the reduced final absorbancy of the bacterial cultures grown with histidine and arginine MRPs supplementations (0.1%), growth rates, in general, remained unaltered by all MRPs at each lysine concentration when compared to the control (M9 pH 5.8, no MRPs added). The induction levels of cadA in media containing 0.1% MRPs were close to cadA induction in the reference media (M9, pH 5.8 and no MRPs) and did not exceed the corresponding values by more than approximately 30%. Although the observed negligible induction of cadA under these conditions complies with the concept of its potential "anti-virulence" function, additional studies involving various concentrations and more refined MRPs are needed.
Irene B Zabala Díaz; Vesela I Chalova; Corliss A O'Bryan; Philip G Crandall; Steven C Ricke
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes     Volume:  45     ISSN:  1532-4109     ISO Abbreviation:  J Environ Sci Health B     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-04-14     Completed Date:  2010-08-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7607167     Medline TA:  J Environ Sci Health B     Country:  England    
Other Details:
Languages:  eng     Pagination:  162-6     Citation Subset:  IM    
Department of Poultry Science, Texas A&M University, College Station, Texas, USA.
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MeSH Terms
Arginine / metabolism
Carboxy-Lyases / genetics*,  metabolism
Food Handling
Food Microbiology
Gene Expression Regulation, Bacterial
Gene Expression Regulation, Enzymologic
Genes, Bacterial*
Histidine / metabolism
Hydrogen-Ion Concentration
Lysine / metabolism
Maillard Reaction*
Salmonella typhimurium* / genetics,  growth & development,  metabolism
Reg. No./Substance:
56-87-1/Lysine; 71-00-1/Histidine; 74-79-3/Arginine; EC 4.1.1.-/Carboxy-Lyases; EC decarboxylase

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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