Malformations and the Manx syndrome in cats

Area of Science:

• Genetics
• Veterinary Medicine
• Developmental Biology

Background:

• Congenital taillessness in cats, known as the Manx condition, presents with varying degrees of tail absence.
• Associated health issues include spina bifida, incontinence, and limb mobility problems, suggesting a complex genetic basis.

Purpose of the Study:

• To investigate the inheritance pattern of congenital taillessness in cats.
• To determine the association between taillessness and malformations in the vertebral column, digestive tract, and central nervous system.

Main Methods:

• Conducted breeding experiments with tailless cats (rumpy and stumpy phenotypes).
• Performed clinical evaluations, radiographic analysis of the vertebral column, and histological studies of the digestive tract and central nervous tissue.

Main Results:

• Confirmed that the tailless (Manx) condition is transmitted via an autosomal dominant factor (M).
• Identified associations between different degrees of taillessness and malformations in examined systems.

Conclusions:

• The study validates the autosomal dominant inheritance of the Manx gene.
• Hypothesizes that central nervous system developmental disturbances during early embryonic life underlie the associated congenital malformations in Manx cats.