Effects of chronic treatment with botulinum toxin type A in salivary glands of rats: Histological and immunohistochemical analyses.
J Oral Pathol Med
; 48(8): 728-734, 2019 Sep.
Article
em En
| MEDLINE
| ID: mdl-31141206
ABSTRACT
BACKGROUND:
The intraglandular application of botulinum neurotoxin type A (BoNT-A) is used in patients with neuromotor disorders to control the escape of saliva. The aim of this study was to analyze the impact of repeated treatment with BoNT-A on the submandibular-sublingual complex of rats.METHODS:
A total of 35 Wistar rats were divided into three groups control group (C), in which animals were not treated; group B, treated with 2.5 U intraglandular injections of BoNT-A (Prosigne® ) and group G, that received bovine gelatine (Prosigne stabilizer). Three applications were performed in intervals of 35 days. Twelve and 35 days after ending the treatment, submandibular-sublingual complex was collected for histological analysis. Immunohistochemical reactions for calponin and specific muscle actin were also performed, besides detection of apoptosis by terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) assay.RESULTS:
A decrease in mucosal and serous acini diameter was observed, with increased interstitial space after 12 days of treatment with BoNT-A, which was observed in a lesser degree on the 35th day. At 12 days, immunohistochemical analysis revealed a decrease in myoepithelial cells of serous acini in group B. TUNEL methods evidenced apoptosis in animals from group B.CONCLUSIONS:
BoNT-A caused histological and cellular changes in submandibular-sublingual complex, followed by a tendency toward reversal after 35 days. The reversal characteristic of cellular changes in the submandibular-sublingual complex suggests that this BoNT-A formulation may be safely used for sialorrhea treatment.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Glândulas Salivares
/
Toxinas Botulínicas Tipo A
Limite:
Animals
Idioma:
En
Revista:
J Oral Pathol Med
Assunto da revista:
ODONTOLOGIA
/
PATOLOGIA
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Brasil