# Sialic Acid and Colchicine Functionalized Silica Nanoparticles: A Novel Approach to Leishmanicidal Selective Treatments

## TL;DR

Researchers developed a new nanomaterial that uses sialic acid and colchicine to selectively target and kill Leishmania parasites, offering a more effective and less toxic treatment for leishmaniasis.

## Contribution

A novel nanomaterial functionalized with sialic acid and colchicine for targeted leishmanicidal treatment is introduced.

## Key findings

- The nanomaterial selectively accumulates Leishmania braziliensis parasites via sialic acid interactions.
- Colchicine on the nanomaterial surface increases parasite mortality in vitro.
- The combination shows improved selectivity and potency over conventional treatments.

## Abstract

Background/Objectives: Leishmaniasis remains a neglected tropical disease, with nearly one million new cases annually and limited investment in research. Current treatments, primarily based on pentavalent antimonials, are associated with severe side effects and increasing resistance. This study aims to develop a novel therapeutic strategy using a nanomaterial functionalized with sialic acid (SA) and colchicine (COL) to selectively target Leishmania braziliensis parasites. Methods: A nanostructured system was engineered by functionalizing its surface with SA and COL. SA was chosen to mimic host cell surfaces, enhancing parasite attraction, while COL was selected for its known leishmanicidal properties. The nanomaterial was designed to concentrate extracellular parasites on its surface via SA-mediated interactions, thereby increasing local COL efficacy. Results: The functionalized nanomaterial demonstrated a dual mechanism: SA facilitated the selective accumulation of Leishmania braziliensis parasites on the nanostructure surface, while COL exerted a cytotoxic effect. This synergistic interaction resulted in enhanced parasite mortality in vitro, suggesting improved selectivity and potency compared to conventional treatments. Conclusions: The proposed nanomaterial offers a promising alternative for leishmaniasis treatment by combining targeted parasite attraction with localized drug delivery. This strategy may reduce systemic toxicity and improve therapeutic outcomes.