Optimisation and evaluation of extracted Karanjin loaded liposomal topical formulation for treatment of psoriasis in tape-stripped mouse model.

Aim: The present work is focus on development of anti-psoriasis activity of Karanjin (isolated from seed oil) loaded liposome based lotion for enhancement of skin permeation and retention.

Method: Karanjin was isolated using liquid-liquid extraction method and characterised by HPLC analysis and partition coefficient. Further, isolated Karanjin was loaded into liposomes using thin-film hydration technique and optimised by Box-Behnken design. Selected optimised batch was characterised their mean diameter, PDI, zeta potential, and entrapment efficiency, morphology (by TEM), FTIR and skin retention. Additionally, Karanjin loaded liposomes were formulated into lotion and characterise their rheological, spreadability, texture, skin permeation & retention, stability and anti-psoriatic activity in mouse tail model.

Result: The yield of Karanjin from seed oil was 0.1% and have lipophilic nature. The optimised liposomal formulation showed 195 ± 1.8 nm mean diameter, 0.271 ± 0.02 PDI, -27.0 ± 2.1 mV zeta potential and 61.97 ± 2.5% EE. TEM image revel the spherical shap of liposome surrounded by single phospholipid bilayer and no interection between drug and excipients. Further, lotion was prepared by 0.1% carbopol and found to 615 mPa.sec viscosity, good thixotropic behaviour, spreadability and texture. There was 22.44% increase in drug permeation for Karanjin loaded liposomal lotion compared to pure Karanjin lotion, confirm by permeation and retention. While, study revel the liposomal lotion of Karanjin was found to have 16.09% higher drug activity then 5% conventional Karanjin lotion.

Conclusion: Karanjin loaded liposomal lotion have an effective anti-psoriatic agent and showed better skin permeation and retention than the conventional Karanjin lotion.