Design of Peptidomimetics That Inhibit the Association of Phosphatidylinositol 3-Kinase with Platelet-Derived Growth Factor-β Receptor and Possess Cellular Activity
摘要:
Phosphorylated tyrosine residues of growth factor receptors that associate with intracellular proteins containing src-homology 2 (SH2) domains are integral components in several signal transduction pathways related to proliferative diseases such as cancer, atherosclerosis, and restenosis. In particular, a phosphorylated pentapeptide [pTyr(751)-Val-Pro-Met(754)-Leu (PTyr = phosphotyrosine)] derived from the primary sequence of platelet-derived growth factor-beta (PDGF-beta) receptor blocks the association of the C-terminal SH2 domain of the p85 subunit of phosphatidylinositol 3-kinase (PI 3-kinase) to PDGF-beta receptor with an IC50 of 0.445 +/- 0.047 mu M. Further evaluation of the structure-activity relationships for pTyr(751)-Val-Pro-Met-Leu resulted in the design of smaller peptidomimetics with enhanced affinity including Ac-pTyr-Val-Ala-N(C6H13)(2) (IC50 = 0.076 +/- 0.010 mu M). In addition, the phosphotyrosine residue was replaced with a difluorophosphonate derivative [4-phosphono(difluoromethyl)phenylalanine (CF(2)Pmp)] which has been shown to be stable to cellular phosphatases. The extracellular administration of either CF(2)Pmp-Val-Pro-Met-Leu or Ac-CF(2)Pmp-Val-Pro-Met-NH2 in a whole cell assay resulted in specific inhibition of the PDGF-stimulated association from the C-terminal SH2 domain of the p85 subunit of PI 3-kinase to the PDGF-beta receptor in a dose-dependent manner. These compounds were also effective in inhibiting GLUT4 translocation, c-fos expression, and cell membrane ruffling in single-cell microinjection assay.
Inhibitors of signal transduction and activator of transcription 3
申请人:McMurray S. John
公开号:US20070010428A1
公开(公告)日:2007-01-11
Stat3 inhibitor compounds are disclosed, wherein the compounds are structural analogs of Ac-pTyr-Leu-Pro-Gln-Thr-NH
2
and bind to the SH2 domain of Stat3 under physiological conditions to inhibit a cellular signaling activity of Stat3.
Synthesis of L-2,3,5,6-tetrafluoro-4-(phosphonomethyl) phenylalanine, a novel non-hydrolyzable phosphotyrosine mimetic and L-4-(phosphonodifluoromethyl)phenylalanine
作者:Wang-Qing Liu、Bernard P. Roques、Christiane Garbay
DOI:10.1016/s0040-4039(97)00027-0
日期:1997.2
A new non-hydrolyzable phosphotyrosine analogue, L-F4Pmp and its N-Fmoc protected derivative were prepared by using an enantioselective synthetic pathway with camphor sultam as chiral auxiliary. The side chain pKa2 (6.9) of L-F4Pmp was determined. A new synthesis of L-F2Pmp was also described.
Disclosed herein are hybrid poly(amidoamine)-amino acid dendrimers, their methods of manufacture, and uses thereof. In accordance with the purposes of the disclosed materials and methods, as embodied and broadly described herein, the disclosed subject matter, in one aspect, relates to dendrimer compounds, methods for their manufacture, and uses thereof. More specifically, the subject matter disclosed herein relates to hybridized poly(amidoamine)-amino acid dendrimer compounds of Formula I as described herein, their methods of manufacture, and uses thereof.
[EN] INHIBITION OF CYTOKINE-INDUCED SH2 PROTEIN IN NK CELLS<br/>[FR] INHIBITION DE PROTÉINES SH2 INDUITES PAR DES CYTOKINES DANS DES CELLULES NK
申请人:THE WALTER AND ELIZA HALL INST OF MEDICAL RES
公开号:WO2017100861A1
公开(公告)日:2017-06-22
The present invention relates to therapeutic and prophylactic methods based on inhibition of CIS in NK cells. In particular, the present invention relates to treating or preventing a NK-responsive condition by administering to a subject a CIS inhibitor, or administering CIS-inhibited NK cells. The invention further relates to methods for identifying a CIS inhibitor, and for determining a likelihood of cancer response to treatment with CIS inhibition.
Cell penetrating peptides and methods of making and using thereof
申请人:Entrada Therapeutics, Inc.
公开号:US10626147B2
公开(公告)日:2020-04-21
Disclosed herein are compounds having activity as cell penetrating peptides. In some examples, the compounds can comprise a cell penetrating peptide moiety and a cargo moiety. The cargo moiety can comprise one or more detectable moieties, one or more therapeutic moieties, one or more targeting moieties, or any combination thereof. In some examples, the cell penetrating peptide moiety is cyclic. In some examples, the cell penetrating peptide moiety and cargo moiety together are cyclic. In some examples, the cell penetrating peptide moiety is cyclic and the cargo moiety is appended to the cyclic cell penetrating peptide moiety structure. In some examples, the cargo moiety is cyclic and the cell penetrating peptide moiety is cyclic, and together they form a fused bicyclic system.