The conjugation of tRNA with folic acid-chitosan conjugates was studied, using multiple spectroscopic methods and transmission electron microscopy (TEM). Thermodynamic analysis ΔH -14 to -10 (KJMol) and ΔS 14 to -1 (JMol, K) showed tRNA-folic acid-chitosan bindings occur via H-bonding, hydrophobic and van der Waals contacts. The loading efficacy and the stability of tRNA conjugates were enhanced as folic acid-chitosan size increased. TEM analysis showed major tRNA morphological changes, upon folic acid-chitosan conjugation. No alteration of tRNA conformation was observed on conjugate formation. Folic acid-chitosan conjugates can deliver tRNA in vitro.
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