Amino acids and peptides. Part 39: a bivalent poly(ethylene glycol) hybrid containing an active site (RGD) and its synergistic site (PHSRN) of fibronectin.

Abstract:

:Fibronectin contains the active sequence Arg-Gly-Asp (RGD), along with its synergic site Pro-His-Ser-Arg-Asn (PHSRN). However, the PHSRN peptide does not show synergic activity when it is mixed with the RGD peptide, indicating that a spatial array between RGD and PHSRN in fibronectin may be necessary for synergic activity. Here, we have used an amino acid type poly(ethylene glycol) derivative (aaPEG) to design a bivalent PEG hybrid of fibronectin active peptides. We prepared the aaPEG hybrid peptides PHSRN-aaPEG, aaPEG-RGD, and PHSRN-aaPEG-RGD, and tested their biological activity. Whereas aaPEG-RGD promoted cell spreading activity, PHSRN-aaPEG had no activity. The PHSRN-aaPEG-RGD hybrid strongly promoted cell spreading compared with aaPEG-RGD. These results suggest that the PHSRN sequence in the PHSRN-aaPEG-RGD molecule synergistically enhances the cell spreading activity of the RGD sequence, and that the bivalent aaPEG hybrid method may be useful for conjugating functionally active peptides.

journal_name

Bioorg Med Chem Lett

authors

Hojo K,Susuki Y,Maeda M,Okazaki I,Nomizu M,Kamada H,Yamamoto Y,Nakagawa S,Mayumi T,Kawasaki K

doi

10.1016/s0960-894x(01)00225-6

subject

Has Abstract

pub_date

2001-06-04 00:00:00

pages

1429-32

issue

11

eissn

0960-894X

issn

1464-3405

pii

S0960-894X(01)00225-6

journal_volume

11

pub_type

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