Method of inhibiting phagocytosis
First Claim
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1. A method of inhibiting the signal transduction of the γ
- subunit of the IgE receptor Fcε
RI comprising introducing into lung cells of a mammal bearing said receptor a peptide inhibitor of Syk kinase, or a mimetic of said peptide, wherein said peptide comprises the sequence YXXL (SEQ ID NO;
8), wherein XX represents any two amino acids,said introduction being effected under conditions such that said signal transduction is inhibited.
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Abstract
The present invention relates, in general, to methods of treating diseases resulting from interactions between immune complexes and Fc receptors. In particular, the present invention relates to methods of modulating the clearance of antibody-coated cells from the circulation by inhibiting phagocytosis and to methods of modulating the interaction of immune complexes with tissue Fc receptors. Further, the invention relates to methods of modulating the activation of immunological processes mediated by Fc receptor activation resulting from antibody-antigen/receptor interaction.
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Citations
29 Claims
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1. A method of inhibiting the signal transduction of the γ
- subunit of the IgE receptor Fcε
RI comprising introducing into lung cells of a mammal bearing said receptor a peptide inhibitor of Syk kinase, or a mimetic of said peptide, wherein said peptide comprises the sequence YXXL (SEQ ID NO;
8), wherein XX represents any two amino acids,said introduction being effected under conditions such that said signal transduction is inhibited. - View Dependent Claims (2, 3, 4, 5, 6, 10)
- subunit of the IgE receptor Fcε
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7. A method of inhibiting signal transduction of the γ
- subunit of the IgE receptor Fcε
RI comprising introducing into cells of a mammal bearing said receptor an antisense construct that specifically binds Syk encoding sequences present in said cell under conditions such that said signal transduction is inhibited. - View Dependent Claims (8, 9, 13, 14, 15)
- subunit of the IgE receptor Fcε
- 11. A method of inhibiting the release of a mediator from a Syk-producing cell of a mammal comprising introducing into said cell an antisense construct that specifically binds Syk encoding sequences present in said cell.
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21. A method of inhibiting the phagocytic potential of a mammalian cell expressing an Fc receptor comprising introducing into said cell a construct comprising, in the 5'"'"'-3'"'"' direction of transcription:
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i) a promoter functional in said cell, ii) a segment of double-stranded DNA, the transcribed strand of which comprises a sequence complementary to endogenous mRNA encoding Syk kinase, and iii) a termination sequence functional in said cell, wherein said construct is introduced under conditions such that said complementary strand is transcribed and binds to said endogenous mRNA thereby reducing expression of Syk kinase and inhibiting the phagocytic and signaling potential of said cell. - View Dependent Claims (22, 25)
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- 23. A method of inhibiting the phagocytic potential of a mammalian cell expressing an Fc receptor comprising introducing into said cell a nucleic acid complementary to an endogenous mRNA encoding Syk kinase, wherein said nucleic acid is introduced under conditions such that said nucleic acid binds to said mRNA and thereby inhibits translation of said mRNA into Syk kinase.
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29. A method of inhibiting the phagocytic potential of a Syk-producing cell comprising introducing into said cell an antisense construct that specifically binds Syk encoding sequences present in said cell under conditions such that production of Syk is inhibited.
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