The Anti-candidal and Absorbtion Performance of PVA/PVP-Based Jania rubens Hydrogel on Candida tropicalis and Some Physicochemical Properties of the Hydrogel

Abstract

This study was aimed to create a bioactive hydrogel form with PVA/PVP (polyvinyl alcohol/poly(N-vinylpyrrolidone) polymer using acetone and ethanol extractions of Jania rubens red algae and investigate some pharmaceutical properties. The anti-candidal activity and some inhibition performance of J. rubens/PVA/PVP hydrogel were investigated on Candida tropicalis which is one of the important causes of bloodstream infections. The physicochemical properties of J. rubens/PVA/PVP hydrogel were revealed using FTIR and swelling-absorption tests. The volatile compounds of J. rubens extracts were examined by GCMS. By mixing the extracts in equal proportions, PVA/PVP-based hydrogel was prepared. According to the results, Cumulative Drug Release was stable at 25 °C for the first 5 h. The IZ (inhibition zone) and MIC (minimum inhibitory concentration) of J. rubens/PVA/PVP hydrogel were 9.01 mm and 80.20 mg/mL, respectively. It was found that logarithmic reduction and percent reduction were seen as 1.5 CFU/mL and 97.5%, respectively, on C. tropicalis exposed to J. rubens/PVA/PVP hydrogel in the first 5 min of the incubation. After exposure of C. tropicalis to J. rubens/PVA/PVP, the number of viable cells transferred from the gel to water was between 76.1 and 73.1% in high glucose medium, while it was between 92.2 and 80.8% for the PVA/PVP hydrogel under the same conditions. As a result, PVA/PVP hydrogel was made bioactive with J. rubens extracts for the first time in this study, and its potential for use as a functional anticandidal hydrogel on C. tropicalis has been demonstrated.

Keywords: Candida tropicalis; Jania rubens; Anti-candidal activity; Hydrogel.

Fig. 1

Swelling rate (%) on J. rubens/PVA/PVP hydrogel and control (PVA/PVP hydrogel)

Fig. 2

IR spectra of PVA/PVP (1) and J. rubens/PVA/PVP hydrogel (2). T (%): transmittance

Fig. 3

Cumulative release of J. rubens from PVA/PVP hydrogel at 10 °C, 25 °C, and 37 °C in buffer solutions of pH 7.4

Fig. 4

Inhibition zones of J. rubens EE, J. rubens AA, and J. rubens/PVA/PVP (A); time-dependent death dynamics of C. tropicalis exposed to J. rubens/PVA/PVP hydrogel (B)

Fig. 5

Absorbance of C. tropicalis by the gels. PVA/PVP free gel (1-control), J. rubens/PVA/PVP free gel (2), cell loaded PVA/PVP, and J. rubens/PVA/PVP (3 and 4, respectively)