Abstract:
:The membrane-membrane fusion during fertilization of oocyte by spermatozoa is believed to be mainly mediated by so called "fusion proteins". In the present study we have tried to demonstrate that beside the proteins, lipid components of membrane may play an important role in fusion of oocyte with spermatozoa. Conventional membrane-membrane fusion assays were used as means to demonstrate fusogenic potential of human sperm membrane lipids. The liposomes (spermatosomes) made of the lipids isolated from sperm membrane were found to undergo strong membrane-membrane fusion as evident from fluorescence dequenching and resonance energy transfer assays. Furthermore, the fusion of these liposomes with living cells (J774 A.1 macrophage cell line) was demonstrated to result in an effective transfer of a water-soluble fluorescent probe (calcein) to cytosol of the target cell. Lastly, the liposomes were demonstrated to behave like efficient vehicles for the in vivo cytosolic delivery of the antigens to target cells resulting in elicitation of antigen specific CD8(+) T cell responses.
journal_name
FEBS Lettjournal_title
FEBS lettersauthors
Atif SM,Hasan I,Ahmad N,Khan U,Owais Mdoi
10.1016/j.febslet.2006.03.015keywords:
subject
Has Abstractpub_date
2006-04-17 00:00:00pages
2183-90issue
9eissn
0014-5793issn
1873-3468pii
S0014-5793(06)00316-4journal_volume
580pub_type
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