Avaliação clínica de Rattus norvegicus após terapia antiinflamatória com inibidor seletivo ou não para COX-2 por extrapolação alométrica

Abstract

The anti-inflammatories no esteroidais (AINEs) they are the drugs of larger prescription all over the world, for humans and for animals. They combat the inflammation, the pain, the temperature increase, could also inhibit the aggregation plaques. They act inhibiting the production of the acid araquidônico and ciclooxigenases (COXs) decreasing like this, the prostaglandins production. They become separated in inhibitors no selective for COX-1 and 2, being those the most traditional; and in selective inhibitors for COX-2, considered more modern drugs. AINEs no selective they reduce the production of all of PGs, constituent or not. Already the selective ones just inhibit harmful PGs, that you/they act in the inflammatory reaction, preserving PGs that maintains, for instance, the protection to the stomach and the renal perfusão. In that study the hepatic function of Rattus norvegicus was evaluated after the use of AINE no selective, cetoprofeno and of selective AINE, valdecoxib. The doses administered to the animals were calculated according to the scaling allometric. The allometric is a method that allows to extrapolate dosage indications of more common species and known for species where studies farmacokinects of the drug was not accomplished in subject, taking into account, among other, the corporal size, the metabolism and the basal tax. After the use of AINEs, the animals were appraised for biochemical methods of alanina amino transferase (ALT), aspartato amino transferase (AST) and alkaline fosfatase (FA), and also, for macroscopic and microscopic evaluation of the liver and right kidney, in different times, after you finish them administrations of the drugs, according to the group which the animal belonged. Among other observations it can be told, that the cetoprofeno, can cause the death of mice, according to the allometric already in the second day of administration of the drug; and that the AINE valdecoxib, doesn't produce macroscopic and microscopic alterations worthy of note, in organs as the liver and kidney of Rattus norvegicus