Abstract: The present invention relates to a non-naturally occurring peptide comprising amino acid sequence S-V-L-T-X1-E-N-X2 (SEQ ID NO: 1), wherein X1 is any amino acid and X2 is any amino acid, which may optionally be linked to an amino acid sequence X3-I-X4-X5-E-X6 (SEQ ID NO: 5), wherein, X3, X4, X5 and X6 each denote any amino acid. The present invention further relates to the use of such peptides as a medicament such as for the prevention and treatment of kidney disease and in apheresis methods.

Abstract: The present invention relates to peptides that are able to bind to anti-PLA2R antibodies. The peptides comprise the amino acid sequence K-X1-X2-X3-X4-X5-K-X6-X7-X8-X9-X10-X11-X12-X13-K (SEQ ID NO:2), in which both X1 and X13 may be cysteine residues. The peptides may have a length of up to 60 amino acid residues, or as little as 31 amino acid residues. The peptides are useful in the prevention or treatment of kidney disease, and methods of preventing or treating kidney disease by providing a therapeutically effective amount of a peptide to a subject, as well as devices for extra corporeal treatment of a patient's blood, are all provided. The invention also provides methods of determining levels of anti-PLA2R antibodies in a subject, and pharmaceutical compositions comprising a peptide and a pharmaceutically acceptable carrier.