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Transcutaneous IL-2 uptake mediated by Transfersomes depends on concentration and fractionated application.

Abstract：

INTRODUCTION:Transfersomes (TF) are new, ultradeformable carriers with characteristics that enable them to penetrate the skin spontaneously. TFs are able to transport noninvasively both low- and high-molecular-weight molecules into the body. MATERIALS AND METHODS:TFs contain phosphatidylcholine and sodium cholate. Recombinant human interleukin-2 (Proleukin, Chiron) was added to the TFs and incubated for 24 h at 4 degrees C. The immunotransfersomes (ITF) were isolated from free interleukin-2 (IL-2) by filtration (Centrisart, Sartorius). Twenty-five thousand, 50,000 and 150,000 IU pure IL-2 and ITFs, which had been incubated with the same concentrations of IL-2, were applied subcutaneously (s.c.) (n = 8) and epicutaneously (e.c.) (n = 8) to mice. The IL-2 serum concentrations in the mice were then measured by ELISA after 2, 4, 6, 8, 10 and 24 h. Fractionation of the transdermal IL-2 application was also examined as a means of improving uptake. RESULTS:In concentrations of 25,000 and 50,000 IU IL-2, the subcutaneous application of ITFs resulted in a longer lasting IL-2 serum concentration than did the subcutaneous application of pure IL-2. While at 25,000 IU, the epicutaneous application of ITFs resulted in serum concentrations comparable to those resulting from s.c. application, at 50,000 and 150,000 IU, only 50% and 22.6% of the maximum serum concentration resulting from the s.c. application of pure IL-2 was obtained. Fractionating the transdermal IL-2 application improved uptake. CONCLUSION:We were able to show that biologically active IL-2 can be bonded to TFs up to 75%. It is possible to transport IL-2 through the skin using TFs. Both the concentration-dependent saturation of the TFs with IL-2 and fractionation of the application resulted in differing degrees of transcutaneous IL-2 uptake.

journal_name

Cytokine

journal_title

Cytokine

authors

Hofer C,van Randenborgh H,Lehmer A,Hartung R,Breul J

doi

10.1016/j.cyto.2003.10.010

keywords:

subject

Has Abstract

pub_date

2004-02-21 00:00:00

pages

141-6

issue

4

eissn

1043-4666

issn

1096-0023

pii

S1043-4666(03)00389-2

journal_volume

25

pub_type

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