Paper 1

Feline Acromegaly and Hypersomatotropism

• Study Focus: Investigating the role of the AIP gene in feline acromegaly, comparing sequence variants in affected and control cats.

Key Findings

• Nonsynonymous SNP Identified: AIP:c.9T > G detected in 20% of acromegalic cats; absent in controls.

• Additional SNPs: Two synonymous SNPs (AIP:c.481C > T and AIP:c.826C > T) also found.

• AIP Gene Sequence: The feline AIP gene shows 91% and 96% homology at nucleotide and amino acid levels, respectively, with the human AIP gene.

AIP Gene Importance

• Gene Function: The AIP protein acts as a tumor suppressor, interacting with AhR and impacting gene transcription.

• Clinical Relevance: Feline acromegaly shares features with human acromegaly involving AIP mutation, including male predominance and poor treatment response.

Study Methodology

• Sample Collection: 10 acromegalic cats and 10 controls were analyzed using PCR and Sanger sequencing for AIP gene variants.

• Sibling Assessment: Two of three acromegalic sibling pairs carried the AIP:c.9T > G SNP, indicating potential familial links.

Conclusions

• Implications of AIP Variant: The identified SNP may influence tumor behavior and predisposition to acromegaly in cats; further studies needed to confirm clinical significance and functional impacts.

• Future Research: Larger, comprehensive studies recommended for validation of results and assessment of AIP as a genetic factor in feline acromegaly.