Uso da Thuya occidentalis no tratamento da papilomatose bovina: aspectos clínicos, histopatológicos e moleculares

Abstract

The bovine viral papillomatosis is an infect-contagious disease with high prevalence in dairy bovines, causing considerable economical losses in this sector. Aiming to contribute with therapeutic research for this pathology, this work had as objective evaluating the efficacy of Thuya occidentalis in the treatment of cutaneous papillomatosis in dairy bovines by the clinical, histopathological and molecular aspects. This research was divided in 4 experiments. Were used in the experiments females of Holstein Friesian crossbred, nuliparous, primiparous and multiparous, exhibiting different types of cutaneous papilloma (typical, atypical, engastated atypical, filamentous and mixing) and of degrees defined for this study: light (25% of the body affected), moderate (with 50% of the body affected) and intensive (with more than 50% of affected body). The animals were kept in a semi intensive system of raising and were randomly distributed in groups with tem animals each. In the experiments I and II the animals were divided into 4 groups, were the groups 1 and 2 received solution of sodium chloride at 0.9% and cereal alcohol, respectively, being these considered controls, and the groups 3 and 4 received the phytotherapic medicines Thuya occidentalis (Simões®) mothre tincture (T.M.) at 30% and Thuya occidentalis mother tincture at 30% with propolis, respectively. The animals received, daily by oral via, 10mL of the products during 63 days. For histopathological evaluation, 50% of the animals were submitted to cutaneous biopsy of the lesions on the zero moment (M0) and the final moment (FM). In the present experiments, the partial and total regression were not observed in any group, once during the clinical and histopathological evaluations, in all moments and groups, the papillomas did not presented macroscopic alterations of remission, color and consistence. In the histopathological analysis it was observed epithelial and conjunctive hyperplasic alterations, with extensive vegetative growth of the epithelium with wide and deep epidermal crest, results that characterize development phase with viral replication and synthesis, being a characteristic finding of papillomatosis. It may be concluded that cutaneous papillomatosis in dairy bovines shows predilection for specific areas. The papillomas were most present on lateral abdomen, dewlap and snout, showing mixing lesions followed by basal and that the use of tinctures at 30% of Thuya occidentalis (Simões®) and Thuya occidentalis with propolis, on the experimental conditions used in this studies, do not cause remission of papillomas in dairy bovines. In experiment III there was used the homeopathic medicine Thuya occidentallis CH6. The animals were distributed at random in 3 groups. The groups 1 and 2 received NaCl 0.9% solution and alcohol cereal, respectively, being these considered controls, and the 3rd group received Thuya occidentalis CH6 in the treatment formula. For the three groups the administration was daily, being 10mL by oral via during 63 days. For histopathologycal evaluation, the animals were submitted to cutaneous biopsy of the papilloma lesions in the zero moment (0M) and final moment (FM). According to the achieved data, the partial or total remission occurred only in group 3 (Thuya occidentalis CH6), where were observed warts fall in 20% of the animals of this group, besides partial regression of the remaining animals, with macroscopic alterations of color and size, findings confirmed by the histopathological exam. In the histopathological analysis there was observed reduction of the thorny layer in all animals of the treated group (G3), showing reduction of epithelial layers with conjunctive tissue of dermal papilla showing active fibroblast and capillaries and rare lymphocytic inflammatory cells. Concluding that Thuya occidentallis CH6 contributes to the treatment of pedunculated papiloma in bovine, being indicated in the presence of this infection. Studies with Thuya occidentalis CH6 must have continuity with bovine carrying basal papillomas in a period of treatment superior to 63 days. The experiment IV had as objective to identify the Bthe Polimerase Chain Reaction (PCR). Using the general (FAP59/64 e MY 11/09) and the specific primers for BPV-2 there was obtained an assertiveness of 33 (82.5%) of the 40 analyzed samples. According to the obtained results it is concluded that the presence of BPV in Pernambuco State-Brazil is in agreement with the world findings, enhancing the importance of the diagnose and control of the infection and, consequently, adoption of an specific therapy. These results emphasize the therapeutic properties of the homeopathic medicine Thuya occidentallis CH6, concluding that its use contributes to the treatment of cutaneous papillomatosis in bovine, emphasizing the necessity of studies for period superior to 63 days with the phytotherapic Thuya occidentalis in bovine carrying cutaneous papilllomatosis, and the serum dosage of AST, GGT, urea and creatinine showed that the plant used in this study, during 63 days, was not able to cause hepatic and renal alterations in bovine with cutaneous papillomatosis.