Ankyloglossia in dogs: a morphological and immunohistochemical study

Area of Science:

• Veterinary Medicine
• Developmental Biology
• Genetics

Background:

• Ankyloglossia is a congenital tongue anomaly often linked to lingual frenulum abnormalities.
• Potential genetic and fetal mechanisms underlying ankyloglossia are under investigation.
• This study focuses on ankyloglossia in Kangal dogs, a breed known for close breeding.

Purpose of the Study:

• To describe the morphology of the ankyloglossia phenotype in Kangal dogs.
• To investigate the immunohistochemical localization of alphaB-crystallin in frenulum tissue.
• To explore the potential role of apoptosis in the development of canine ankyloglossia.

Main Methods:

• Morphological examination of ankyloglossia in affected Kangal dogs.
• Immunohistochemical analysis of frenulum tissue for alphaB-crystallin.
• Histological evaluation of frenulum tissue structure.

Main Results:

• Ankyloglossia in Kangal dogs presented as a lingual frenulum extending to the tongue tip, often causing a 'W' shape.
• No associated craniofacial anomalies were observed.
• AlphaB-crystallin was exclusively localized in skeletal muscle fibers within the frenulum.

Conclusions:

• Ankyloglossia in dogs typically occurs as an isolated anomaly.
• The presence of alphaB-crystallin in skeletal muscle fibers suggests a potential role for delayed apoptosis in ankyloglossia development.
• Further research into the genetic and molecular mechanisms of canine ankyloglossia is warranted.