The basement membrane at the equine hoof dermal epidermal junction.

The research article focuses on studying the properties and structure of the basement membrane in the equine hoof, which is responsible for connecting the hoof wall to the connective tissues of the distal phalanx. The study also determines that laminin is a component of the equine basement membrane and highlights differences in the hoof basement membrane’s ultrastructure compared to other animals.

Research Methodology

• The researchers used various connective tissue stains such as periodic acid Schiff, periodic acid silver methenamine, and Azan. These stains aid in providing a clear resolution of the lamellar basement membrane, unlike haematoxylin and eosin.
• This study utilized mouse monoclonal antibodies raised against human laminin to verify its presence in the equine basement membrane.
• They examined large areas of the hoof wall basement membrane through a scanning electron microscope. For efficient examination, they treated the tissue blocks with detergent/enzyme or sodium bromide.

Findings and Observations

• The ultrastructure of the equine hoof basement membrane resembled that of other animals but showed several anchoring fibrils and extensions of the lamina densa into the adjacent connective tissue. This structure is believed to give extra strength to the region.
• Separating epidermal lamellae from the dermal counterparts allowed the basement membrane to stay with the dermis, and the dermal lamellae could maintain their natural shape even without the adjacent epidermis.
• The exposed surface of the lamellar basement membrane appeared smooth and unbroken but showed small indentations and fine wrinkles. At the lamellae’s cut edges, a mesh of fine connective tissue fibres was observed, attached to the inner surface of the basement membrane.
• The basement membrane of the coronary and terminal papillae folded into multiple longitudinal ridges, all parallel to the long axis of the papillae.

Conclusion

• This research helps in understanding the unique properties and structure of the equine hoof basement membrane. It’s fundamental in developing further studies around equine hoof health, and managing and preventing potential diseases.
• The clear identification of laminin as a component of the equine basement membrane can open up new avenues of therapeutic interventions targeting the basement membrane composition.