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Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Dose+Response 2018 ; 16 (2): ä Nephropedia Template TP
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Murburn Concept: A Molecular Explanation for Hormetic and Idiosyncratic Dose Responses #MMPMID29770107
Parashar A; Gideon DA; Manoj KM
Dose Response 2018[Apr]; 16 (2): ä PMID29770107show ga
Recently, electron transfers and catalyses in a bevy of redox reactions mediated by hemeproteins were explained by murburn concept. The term ?murburn? is abstracted from ?muredburning? or ?mildunrestrictedburning? and connotes a novel ?molecule-unbound ion?radical? interaction paradigm. Quite unlike the genetic regulations and protein-level affinity-based controls that govern order and specificity/selectivity in conventional treatments, murburn concept is based on stochastic/thermodynamic regulatory principles. The novel insight necessitates a ?reactivity outside the active-site? perspective, because select redox enzymatic activity is obligatorily mediated via diffusible radical/species. Herein, reactions employing key hemeproteins (as exemplified by CYP2E1) establish direct experimental connection between ?additive-influenced redox catalysis? and ?unusual dose responses? in reductionist and physiological milieu. Thus, direct and conclusive molecular-level experimental evidence is presented, supporting the mechanistic relevance of murburn concept in ?maverick? concentration-based effects brought about by additives. Therefore, murburn concept could potentially explain several physiological hormetic and idiosyncratic dose responses.