# Glyco-Architectural Remodelling of the Feline Heart: Age- and HCM-Related Insights from Lectin Histochemistry

## TL;DR

This study explores how sugar molecules on feline heart cells change with age and in a heart disease called HCM, using special stains to highlight these changes.

## Contribution

The first systematic analysis of glycosylation patterns in feline hearts across age and HCM status using lectin histochemistry.

## Key findings

- Distinct lectin-binding patterns were observed in feline myocardium, varying by age and disease state.
- Aged and HCM-affected hearts showed significant glycan remodelling, indicating structural and molecular changes.
- The study establishes a baseline for future research on glycan motifs as post-mortem disease markers in cats.

## Abstract

Glycosylation plays a critical role in maintaining cardiac structure and function, yet its modulation during aging and hypertrophic cardiomyopathy (HCM) in feline hearts remains uncharacterized. This study provides a systematic analysis of lectin-binding patterns in feline myocardium across different age groups and disease states. Post-mortem feline hearts (n = 64), classified by age (newborn to senior) and diagnostic status (healthy vs. HCM-affected), were evaluated using tissue microarrays stained with five plant-derived lectins—Concanavalin A (ConA), Wheat Germ Agglutinin (WGA), RCA (Ricinus communis Agglutinin I), Tomato (Lycopersicon esculentum Agglutinin), and Griffonia (Bandeiraea) simplicifolia Lectin I (BS)—alongside Draq5 nuclear counterstaining. Lectin histochemistry revealed distinct, region-specific glycosylation patterns, with notable remodelling in both aged and HCM-affected hearts. These glycan alterations reflect underlying molecular and structural changes associated with cardiac aging and pathology. Although lectin histochemistry has been used to examine cardiac glycosylation in species such as mice, rats, zebrafish, and humans, comparable data for felines have been lacking, even if domestic cat represents a spontaneous model for human HCM. This study provides the first essential step in characterizing the feline cardiac glycosylation. The observed shifts in lectin-binding profiles reveal specific remodelling associated with aging and HCM in cats. These results provide a foundation for future studies assessing the utility of glycan motifs as potential post-mortem markers of disease progression in felines.