Abstract:This publication is the seventh in a series of safety evaluations performed by the Expert Panel of the Flavor and Extract Manufacturers Association (FEMA). In 1993, the Panel initiated a comprehensive program to re-evaluate the safety of more than 1700 GRAS flavoring substances under conditions of intended use. Elements that are fundamental to the safety evaluation of flavor ingredients include exposure, structural analogy, metabolism, pharmacokinetics and toxicology. Flavor ingredients are evaluated individua… Show more
“…Human exposure to t-CA is common due to its presence in the diet, fragrances, electronic cigarettes, and use as a complementary treatment of diabetes and other maladies (Friedman et al, 2000;Adams et al, 2004;Bickers et al, 2005;Crawford, 2009). From a toxicological perspective, it contains a well known structural alert (i.e., a,b-unsaturated carbonyl), reacts with skin proteins (Elahi et al, 2004), and is implicated in contact dermatitis (Seite-Bellezza et al, 1994).…”
Human exposure to trans-cinnamic aldehyde [t-CA; cinnamaldehyde; cinnamal; (E)-3-phenylprop-2-enal] is common through diet and through the use of cinnamon powder for diabetes and to provide flavor and scent in commercial products. We evaluated the likelihood of t-CA to influence metabolism by inhibition of P450 enzymes. IC 50 values from recombinant enzymes indicated that an interaction is most probable for CYP2A6 (IC 50 = 6.1 mM). t-CA was 10.5-fold more selective for human CYP2A6 than for CYP2E1; IC 50 values for P450s 1A2, 2B6, 2C9, 2C19, 2D6, and 3A4 were 15.8-fold higher or more. t-CA is a type I ligand for CYP2A6 (K S = 14.9 mM). Inhibition of CYP2A6 by t-CA was metabolism-dependent; inhibition required NADPH and increased with time. Glutathione lessened the extent of inhibition modestly and statistically significantly. The carbon monoxide binding spectrum was dramatically diminished after exposure to NADPH and t-CA, suggesting degradation of the heme or CYP2A6 apoprotein. Using a static model and mechanism-based inhibition parameters (K I = 18.0 mM; k inact = 0.056 minute 21
“…Human exposure to t-CA is common due to its presence in the diet, fragrances, electronic cigarettes, and use as a complementary treatment of diabetes and other maladies (Friedman et al, 2000;Adams et al, 2004;Bickers et al, 2005;Crawford, 2009). From a toxicological perspective, it contains a well known structural alert (i.e., a,b-unsaturated carbonyl), reacts with skin proteins (Elahi et al, 2004), and is implicated in contact dermatitis (Seite-Bellezza et al, 1994).…”
Human exposure to trans-cinnamic aldehyde [t-CA; cinnamaldehyde; cinnamal; (E)-3-phenylprop-2-enal] is common through diet and through the use of cinnamon powder for diabetes and to provide flavor and scent in commercial products. We evaluated the likelihood of t-CA to influence metabolism by inhibition of P450 enzymes. IC 50 values from recombinant enzymes indicated that an interaction is most probable for CYP2A6 (IC 50 = 6.1 mM). t-CA was 10.5-fold more selective for human CYP2A6 than for CYP2E1; IC 50 values for P450s 1A2, 2B6, 2C9, 2C19, 2D6, and 3A4 were 15.8-fold higher or more. t-CA is a type I ligand for CYP2A6 (K S = 14.9 mM). Inhibition of CYP2A6 by t-CA was metabolism-dependent; inhibition required NADPH and increased with time. Glutathione lessened the extent of inhibition modestly and statistically significantly. The carbon monoxide binding spectrum was dramatically diminished after exposure to NADPH and t-CA, suggesting degradation of the heme or CYP2A6 apoprotein. Using a static model and mechanism-based inhibition parameters (K I = 18.0 mM; k inact = 0.056 minute 21
“…It is a generally recognized as safe (GRAS) molecule approved for use in foods by the Food and Drug Administration (FDA). The U. S. Flavoring Extract Manufacturers' Association reported that TC has a wide margin of safety between conservative estimates of intake and no observed adverse effect levels, from sub-chronic and chronic studies (Adams et al, 2004). The report also indicated no genotoxic or mutagenic effects due to TC.…”
Section: Trans-cinnamaldehydementioning
confidence: 78%
“…Trans-cinnamaldehyde (TC) is a major component of the bark extract of cinnamon (Adams et al, 2004). It is a generally recognized as safe (GRAS) molecule approved for use in foods by the Food and Drug Administration (FDA).…”
“…Additionally, transcinnamaldehyde has been shown to reduce the expression of several virulence genes essential for Uropathogenic Escherichia coli (UPEC) motility, host cell attachment and invasion. trans-Cinnamaldehyde has been recognized by the FDA as a safe molecule for use in food, and sub-chronic and chronic studies show this compound to have no adverse effects (Adams et al, 2004). These findings suggest that both transcinnamaldehyde and curcumin are potential candidates for the inhibition of biofilm production, as well as anti-adhesive agents (Amalaradjou et al, 2011).…”
The cells of microorganisms often stick together and adhere to biotic and inert surfaces to form coats (biofilms) that are impenetrable and often highly resistant to antibiotics, as well as being adaptive to immune responses of the host. The aim of this study is to develop drugs that are able to prevent cell adhesion and/or penetrate biofilm layer and reach the bacteria to render them harmless. trans-Cinnamaldehyde, found in oils and cinnamon barks, and curcumin found in turmeric have been found to hold such pharmacologic properties. The newly developed product hybrids were evaluated for their ability to exert in vitro antibacterial activity as well as their potential as bacterial anti-adhesive agents on several different bacteria. In summary, we have developed several novel compounds that show both antibacterial and anti-adhesive properties. Although the compounds are not as potent as the positive controls, they serve as lead for further structural modification to develop more potent derivatives.
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