Use of laser capture microdissection for the assessment of equine lamellar basal epithelial cell signalling in the early stages of laminitis.
Authors: Leise B S, Watts M R, Roy S, Yilmaz A S, Alder H, Belknap J K
Journal: Equine veterinary journal
Summary
# Editorial Summary Early-stage laminitis fundamentally involves the detachment of lamellar basal epithelial cells (LBECs) from the dermis, yet most previous research has examined this process at the tissue level rather than within the specific cells driving failure. Leise and colleagues employed laser capture microdissection to isolate LBECs from horses with experimentally induced sepsis-related laminitis, allowing them to analyse cellular signalling pathways with unprecedented precision at the point of pathological change. The technique revealed distinct molecular alterations occurring within basal epithelial cells during early laminitis that had been obscured in previous whole-tissue analyses, providing direct evidence of specific signalling events responsible for the dysadhesion process. This granular understanding of LBEC behaviour opens new possibilities for developing targeted therapeutics that could interrupt cell detachment before structural failure becomes irreversible, rather than relying solely on systemic anti-inflammatory approaches. For practitioners managing acute laminitis cases, these findings suggest that early intervention aimed at stabilising epithelial cell adhesion mechanisms—rather than waiting for clinical signs to develop—may offer a more effective treatment window.
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Practical Takeaways
- •Understanding LBEC-specific signalling mechanisms may lead to targeted therapeutic interventions earlier in laminitis development
- •Cell-level research demonstrates why laminitis pathology is so severe—failure occurs at the critical epithelial-dermal adhesion interface
- •This methodological approach could improve future laminitis research by distinguishing primary cellular events from secondary inflammatory responses
Key Findings
- •Laser capture microdissection enables targeted analysis of signalling events specific to lamellar basal epithelial cells rather than whole lamellar tissue
- •Dysadhesion of LBECs from dermis is the central structural failure mechanism in equine laminitis
- •Previous studies of sepsis-related laminitis have documented multiple tissue-wide events but lack cell-specific signalling data from LBECs