title: Multiple regression of skeletal muscle tension on inositol phosphates: cross-talk between signal transduction mechanisms in burn trauma.
abstract: Skeletal muscle weakness associated with burn trauma prolongs the time of rehabilitation of burn patients. Understanding the underlying chemical changes that impact on physiological tension may provide new therapeutic options for the treatment of burn patients. This report demonstrates the novelty of applying 3-dimensional graphic capabilities, involving area and vector changes to understand variations in inositol derivatives and their co-modulating influence on physiological tension in skeletal muscle. This muscle was distant from the primary anatomical burn site. It was subjected to circulatory shock emanating from burn trauma. Burn injury was achieved by scalding of predefined areas (0, 20% and 50%) on the dorsal and ventral surfaces of mice. At day 21, tension studies via muscle twitch analyses were performed. Through multiple regression, the dependency of physiologic tension was determined with respect to three poly-inositol forms each representing independent parameters simultaneously. The contribution of each of these parameters was assigned to a three-dimensional axis. Relationships of tension on three fixed independent parameters were found only for the 20% and 50% burn groups. Vector analysis on a plane in three-dimensional space determined the relationship of tension to each of the independent parameters in 20% and 50% burn groups. No significant relationship of tension dependency on three fixed poly-inositol variables was found in the control group. Such vector analysis, using solid and differential analytical geometry, allowed for a clear visualization of the interrelationships that existed between secondary messenger systems (viz, IP3) and a resulting physiologic manifestation (viz, tension). This clear visualization allows for a greater understanding of messenger systems that may lead to more effective treatment of skeletal muscle weakness associated with the systemic effects of severe burn trauma.
authors.affiliation: Clinical Pharmacology Laboratory, Shriners Burn Institute, Boston, MA.
authors.forename: J F
authors.initials: JF
authors.lastname: Tomera
authors.forename: K
authors.initials: K
authors.lastname: Lilford
mesh_terms: D000818:Animals; D002056:Burns / Q000378:metabolism / Q000503:physiopathology*; D004195:Disease Models, Animal; D015544:Inositol 1,4,5-Trisphosphate / Q000378:metabolism / Q000494:pharmacology; D007295:Inositol Phosphates / Q000378:metabolism / Q000502:physiology*; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D015999:Multivariate Analysis; D009119:Muscle Contraction / Q000187:drug effects / Q000502:physiology; D009132:Muscles / Q000187:drug effects / Q000378:metabolism / Q000503:physiopathology*; D012044:Regression Analysis; D015398:Signal Transduction / Q000502:physiology*
chemical_list: D007295:Inositol Phosphates; D015544:Inositol 1,4,5-Trisphosphate