Compositions and methods for reducing adhesiveness of...

C - Chemistry – Metallurgy – 07 – K

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C07K 14/705 (2006.01) A61K 38/17 (2006.01) C07K 7/06 (2006.01) C07K 16/20 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2215414

Peptide sequences and analogs thereof based on amino acid motifs in band 3 which are effective in reducing the adhesiveness of pathologically adhesive red blood cells. One class of peptide sequences are characterized by the sequence motif Z1xKxxx+, wherein Z1 is selected from the group consisting of tyrosine, phenylalanine and alanine; x is an unobstructive residue and + is a positively charged residue (e.g., K or P-H). These peptides are used to reduce adhesiveness in the treatment of sickle cell disease, thalassemia and diabetes. A second class of peptide sequences are characterized by the sequence motif Z2Z2Z2x-xxx-, wherein Z2 represents a hydrophobic residue, x is an unobstructive residue and - is a negatively charged residue. These peptides can be used to reduce adhesiveness in the treatment of malaria, sickle cell disease, thalassemia and diabetes.

L'invention concerne des séquences de peptides et leurs analogues à base de motifs d'acides aminés en bande (3), capables de réduire l'adhésivité des hématies pathologiquement adhésives. Une première classe de séquences de peptides se caractérise par le motif Z?1¿xKxxx+, où Z?1¿ provient du groupe composé de la tyrosine, de la phénylalanine et de l'alanine; x est un résidu non obstructif et + est un résidu chargé positivement (par exemple K ou P-H). Ces peptides servent à réduire l'adhésivité dans le traitement de la drépanocythose, de la thalassémie et du diabète. Une seconde classe de séquences de peptides se caractérise par le motif Z?2¿Z?2¿Z?2¿x-xxx-, où Z?2¿ représente un résidu hydrophobe, x un résidu non obstructif et - un résidu chargé négativement. Ces peptides peuvent sevir à réduire l'adhésivité dans le traitement du paludisme, de la drépanocythose, de la thalassémie et du diabète.

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