Mixed Liposome Approach for Ratiometric and Sequential Delivery of Paclitaxel and Gemcitabine.

Abstract:

:Paclitaxel (PTX) and gemcitabine (GEM) are often used in combination due to the synergistic anticancer effects. PTX and GEM combination showed a synergistic effect to SKOV-3 cells at a molar ratio of 1 to 1 and in PTX ➔ GEM sequence. Liposomes were explored as a carrier of PTX and GEM combination. We optimized the drug loading in liposomes varying the preparation method and co-encapsulated PTX and GEM in a single liposome preparation maintaining the maximum loading efficiency of each drug. However, drug release kinetics from the co-loaded liposomes (LpPG) was suboptimal because of the detrimental effect of PTX on GEM-release control. Instead, a mixture of LpP and LpG, which were separately optimized according to the desired release kinetics, achieved a greater cytotoxic effect than LpPG, due to the attenuation of GEM release relative to PTX. This study illustrates that co-encapsulation in a single carrier is not always desirable for the delivery of drug combinations, when the activity depends on the dosing sequence. These combinations may benefit from the mixed liposome approach, which offers greater flexibility in controlling the ratio and release kinetics of component drugs.

journal_name

AAPS PharmSciTech

journal_title

AAPS PharmSciTech

authors

Liu Y,Tamam H,Yeo Y

doi

10.1208/s12249-017-0877-z

subject

Has Abstract

pub_date

2018-02-01 00:00:00

pages

693-699

issue

2

issn

1530-9932

pii

10.1208/s12249-017-0877-z

journal_volume

19

pub_type

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