General Information of This Peptide
Peptide ID
PEP00163
Peptide Name
c[DKP-RGD]
Structure
Sequence
RGD
Peptide Type
Cyclic
Receptor Name
Indoleamine 2,3-dioxygenase 1 (IDO1)
 Receptor Info 
PDC Transmembrane Types Cell targeting peptides (CTPs)
Formula
C27H38N10O8
Isosmiles
N=C(N)NCCC[C@@H]1NC(=O)C[C@@H]2C(=O)N[C@@H](CNC(=O)[C@H](CC(=O)O)NC(=O)CNC1=O)C(=O)N2Cc1ccc(CN)cc1
InChI
InChI=1S/C27H38N10O8/c28-10-14-3-5-15(6-4-14)13-37-19-9-20(38)34-16(2-1-7-31-27(29)30)23(42)33-12-21(39)35-17(8-22(40)41)24(43)32-11-18(26(37)45)36-25(19)44/h3-6,16-19H,1-2,7-13,28H2,(H,32,43)(H,33,42)(H,34,38)(H,35,39)(H,36,44)(H,40,41)(H4,29,30,31)/t16-,17-,18-,19+/m0/s1
InChIKey
LDILHAXCSRSOSM-CADBVGFASA-N
Pharmaceutical Properties
Molecule Weight
630.663
Polar area
291.03
Complexity
630.2874082
xlogp Value
-4.31543
Heavy Count
45
Rot Bonds
9
Hbond acc
9
Hbond Donor
10
The Activity Data of This Peptide
Peptide Activity Information 1 [1], [2]
IC50 > 5 nM
Binding Affinity Assay
IC50values were calculated as the concentration of compound required for 50% inhibition of biotinylated vitronectin binding
Experimental Condition αvβ5 receptor
Peptide Activity Information 2 [1], [2]
IC50 26.4±3.7 nM
Binding Affinity Assay
IC50values were calculated as the concentration of compound required for 50% inhibition of biotinylated vitronectin binding
Experimental Condition αvβ3 receptor
Each Peptide-drug Conjugate Related to This Peptide
Full Information of The Activity Data of The PDC(s) Related to This Peptide
NLG-RGD [Investigative]
Obtained from the Model Organism Data
Click To Hide/Show 6 Activity Data Related to This Level
Experiment 1 Reporting the Activity Data of This PDC [3]
Indication Tumor
Efficacy Data Percentage of Treg cells
1%
Administration Time 30 min
Administration Dosage 25 µM
Evaluation Method Quantification of tumor-infiltrating immune cells assay
MOA of PDC
Significantly, this nanoinhibitor boosts the antitumor immune response of PD-L1 blockade by increasing immune effector cells and reducing immunosuppressive cells.
Description
These findings support that aPD-L5 plus NLG-RGD NI efficiently elicits antitumor immunity by enhancing the activation and survival of immune effector cells and attenuating the accumulation immunosuppressive Treg cells.
In Vivo Model Pan02 tumor model.
In Vitro Model Normal Regulatory CD4+ T cell Homo sapiens
Experiment 2 Reporting the Activity Data of This PDC [3]
Indication Tumor
Efficacy Data Percentage of NK cells
2%
Administration Time 30 min
Administration Dosage 25 µM
Evaluation Method Quantification of tumor-infiltrating immune cells assay
MOA of PDC
Significantly, this nanoinhibitor boosts the antitumor immune response of PD-L1 blockade by increasing immune effector cells and reducing immunosuppressive cells.
Description
These findings support that aPD-L6 plus NLG-RGD NI efficiently elicits antitumor immunity by enhancing the activation and survival of immune effector cells and attenuating the accumulation immunosuppressive Treg cells.
In Vivo Model Pan02 tumor model.
In Vitro Model Normal Natural killer cell Homo sapiens
Experiment 3 Reporting the Activity Data of This PDC [3]
Indication Tumor
Efficacy Data Percentage of IFN-γ-producing CD8 T cells
40%
Administration Time 30 min
Administration Dosage 25 µM
Evaluation Method Quantification of tumor-infiltrating immune cells assay
MOA of PDC
Significantly, this nanoinhibitor boosts the antitumor immune response of PD-L1 blockade by increasing immune effector cells and reducing immunosuppressive cells.
Description
These findings support that aPD-L4 plus NLG-RGD NI efficiently elicits antitumor immunity by enhancing the activation and survival of immune effector cells and attenuating the accumulation immunosuppressive Treg cells.
In Vivo Model Pan02 tumor model.
In Vitro Model Normal IFN-gamma-producing CD4 T cell Homo sapiens
Experiment 4 Reporting the Activity Data of This PDC [3]
Indication Tumor
Efficacy Data Percentage of IFN-γ-producing CD4 T cells
16%
Administration Time 30 min
Administration Dosage 25 µM
Evaluation Method Quantification of tumor-infiltrating immune cells assay
MOA of PDC
Significantly, this nanoinhibitor boosts the antitumor immune response of PD-L1 blockade by increasing immune effector cells and reducing immunosuppressive cells.
Description
These findings support that aPD-L3 plus NLG-RGD NI efficiently elicits antitumor immunity by enhancing the activation and survival of immune effector cells and attenuating the accumulation immunosuppressive Treg cells.
In Vivo Model Pan02 tumor model.
In Vitro Model Normal IFN-gamma-producing CD4 T cell Homo sapiens
Experiment 5 Reporting the Activity Data of This PDC [3]
Indication Tumor
Efficacy Data Percentage of CD8 T cells
34%
Administration Time 30 min
Administration Dosage 25 µM
Evaluation Method Quantification of tumor-infiltrating immune cells assay
MOA of PDC
Significantly, this nanoinhibitor boosts the antitumor immune response of PD-L1 blockade by increasing immune effector cells and reducing immunosuppressive cells.
Description
These findings support that aPD-L2 plus NLG-RGD NI efficiently elicits antitumor immunity by enhancing the activation and survival of immune effector cells and attenuating the accumulation immunosuppressive Treg cells.
In Vivo Model Pan02 tumor model.
In Vitro Model Normal CD8 T cell Homo sapiens
Experiment 6 Reporting the Activity Data of This PDC [3]
Indication Tumor
Efficacy Data Percentage of CD4 T cells
32%
Administration Time 30 min
Administration Dosage 25 µM
Evaluation Method Quantification of tumor-infiltrating immune cells assay
MOA of PDC
Significantly, this nanoinhibitor boosts the antitumor immune response of PD-L1 blockade by increasing immune effector cells and reducing immunosuppressive cells.
Description
These findings support that aPD-L1 plus NLG-RGD NI efficiently elicits antitumor immunity by enhancing the activation and survival of immune effector cells and attenuating the accumulation immunosuppressive Treg cells.
In Vivo Model Pan02 tumor model.
In Vitro Model Normal CD4 T cell Homo sapiens
Dau=Aoa-GFLG-c[DKP-RGD] [Investigative]
Revealed Based on the Cell Line Data
Click To Hide/Show 6 Activity Data Related to This Level
Experiment 1 Reporting the Activity Data of This PDC [1]
Indication Tumor
Efficacy Data Half Maximal Effective Concentration (EC50)
2.5 μM
Administration Time 72 h
Description
All dau-loaded conjugates showed high toxicity in all cell lines tested with EC50 values in the lower micromolar range.
In Vitro Model Glioblastoma U87 cell CVCL_3429
Experiment 2 Reporting the Activity Data of This PDC [1]
Indication Tumor
Efficacy Data Half Maximal Effective Concentration (EC50)
5.4 μM
Administration Time 72 h
Description
All dau-loaded conjugates showed high toxicity in all cell lines tested with EC50 values in the lower micromolar range.
In Vitro Model Colon cancer HT29 cell CVCL_A8EZ
Experiment 3 Reporting the Activity Data of This PDC [1]
Indication Tumor
Efficacy Data Half Maximal Effective Concentration (EC50)
14.7 μM
Administration Time 72 h
Description
All dau-loaded conjugates showed high toxicity in all cell lines tested with EC50 values in the lower micromolar range.
In Vitro Model Invasive breast carcinoma MCF-7 cell CVCL_0031
Experiment 4 Reporting the Activity Data of This PDC [1]
Indication Tumor
Efficacy Data Half Maximal Effective Concentration (EC50)
49.4 μM
Administration Time 15 min
Description
More specifically, compounds1band3bdemonstrated significantly higher activity against U87 cells compared to MCF-7 and HT-29 cells (Figure6). Importantly,1bwas more active than3bdemonstrating that the attached CPP is indeed necessary to increase the overall cellular uptake and thus cytotoxic activity of the conjugates. Of note is also that2bwas less efficient than1bbut marginally more active than3b, although with no selectivity. For the two conjugates bearing the GFLG motif, it was seen that3cis still significantly more active in U87 cells expressing integrin receptors. By contrast,1ckept its selectivity against HT-29 cells, but was pronouncedly more active in MCF-7 cells compared to1b.

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In Vitro Model Glioblastoma U87 cell CVCL_3429
Experiment 5 Reporting the Activity Data of This PDC [1]
Indication Tumor
Efficacy Data Half Maximal Effective Concentration (EC50) > 150 μM
Administration Time 15 min
Description
More specifically, compounds1band3bdemonstrated significantly higher activity against U87 cells compared to MCF-7 and HT-29 cells (Figure6). Importantly,1bwas more active than3bdemonstrating that the attached CPP is indeed necessary to increase the overall cellular uptake and thus cytotoxic activity of the conjugates. Of note is also that2bwas less efficient than1bbut marginally more active than3b, although with no selectivity. For the two conjugates bearing the GFLG motif, it was seen that3cis still significantly more active in U87 cells expressing integrin receptors. By contrast,1ckept its selectivity against HT-29 cells, but was pronouncedly more active in MCF-7 cells compared to1b.

   Click to Show/Hide
In Vitro Model Colon cancer HT29 cell CVCL_A8EZ
Experiment 6 Reporting the Activity Data of This PDC [1]
Indication Tumor
Efficacy Data Half Maximal Effective Concentration (EC50) > 150 μM
Administration Time 15 min
Description
More specifically, compounds1band3bdemonstrated significantly higher activity against U87 cells compared to MCF-7 and HT-29 cells (Figure6). Importantly,1bwas more active than3bdemonstrating that the attached CPP is indeed necessary to increase the overall cellular uptake and thus cytotoxic activity of the conjugates. Of note is also that2bwas less efficient than1bbut marginally more active than3b, although with no selectivity. For the two conjugates bearing the GFLG motif, it was seen that3cis still significantly more active in U87 cells expressing integrin receptors. By contrast,1ckept its selectivity against HT-29 cells, but was pronouncedly more active in MCF-7 cells compared to1b.

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In Vitro Model Invasive breast carcinoma MCF-7 cell CVCL_0031
c[DKP-RGD]-PEG4-Aoa=dau [Investigative]
Revealed Based on the Cell Line Data
Click To Hide/Show 6 Activity Data Related to This Level
Experiment 1 Reporting the Activity Data of This PDC [1]
Indication Tumor
Efficacy Data Half Maximal Effective Concentration (EC50)
3 μM
Administration Time 72 h
Description
All dau-loaded conjugates showed high toxicity in all cell lines tested with EC50 values in the lower micromolar range.
In Vitro Model Glioblastoma U87 cell CVCL_3429
Experiment 2 Reporting the Activity Data of This PDC [1]
Indication Tumor
Efficacy Data Half Maximal Effective Concentration (EC50)
9.2 μM
Administration Time 72 h
Description
All dau-loaded conjugates showed high toxicity in all cell lines tested with EC50 values in the lower micromolar range.
In Vitro Model Colon cancer HT29 cell CVCL_A8EZ
Experiment 3 Reporting the Activity Data of This PDC [1]
Indication Tumor
Efficacy Data Half Maximal Effective Concentration (EC50)
21.7 μM
Administration Time 72 h
Description
All dau-loaded conjugates showed high toxicity in all cell lines tested with EC50 values in the lower micromolar range.
In Vitro Model Invasive breast carcinoma MCF-7 cell CVCL_0031
Experiment 4 Reporting the Activity Data of This PDC [1]
Indication Tumor
Efficacy Data Half Maximal Effective Concentration (EC50)
56.9 μM
Administration Time 15 min
Description
More specifically, compounds1band3bdemonstrated significantly higher activity against U87 cells compared to MCF-7 and HT-29 cells (Figure6). Importantly,1bwas more active than3bdemonstrating that the attached CPP is indeed necessary to increase the overall cellular uptake and thus cytotoxic activity of the conjugates. Of note is also that2bwas less efficient than1bbut marginally more active than3b, although with no selectivity. For the two conjugates bearing the GFLG motif, it was seen that3cis still significantly more active in U87 cells expressing integrin receptors. By contrast,1ckept its selectivity against HT-29 cells, but was pronouncedly more active in MCF-7 cells compared to1b.

   Click to Show/Hide
In Vitro Model Glioblastoma U87 cell CVCL_3429
Experiment 5 Reporting the Activity Data of This PDC [1]
Indication Tumor
Efficacy Data Half Maximal Effective Concentration (EC50) > 150 μM
Administration Time 15 min
Description
More specifically, compounds1band3bdemonstrated significantly higher activity against U87 cells compared to MCF-7 and HT-29 cells (Figure6). Importantly,1bwas more active than3bdemonstrating that the attached CPP is indeed necessary to increase the overall cellular uptake and thus cytotoxic activity of the conjugates. Of note is also that2bwas less efficient than1bbut marginally more active than3b, although with no selectivity. For the two conjugates bearing the GFLG motif, it was seen that3cis still significantly more active in U87 cells expressing integrin receptors. By contrast,1ckept its selectivity against HT-29 cells, but was pronouncedly more active in MCF-7 cells compared to1b.

   Click to Show/Hide
In Vitro Model Colon cancer HT29 cell CVCL_A8EZ
Experiment 6 Reporting the Activity Data of This PDC [1]
Indication Tumor
Efficacy Data Half Maximal Effective Concentration (EC50) > 150 μM
Administration Time 15 min
Description
More specifically, compounds1band3bdemonstrated significantly higher activity against U87 cells compared to MCF-7 and HT-29 cells (Figure6). Importantly,1bwas more active than3bdemonstrating that the attached CPP is indeed necessary to increase the overall cellular uptake and thus cytotoxic activity of the conjugates. Of note is also that2bwas less efficient than1bbut marginally more active than3b, although with no selectivity. For the two conjugates bearing the GFLG motif, it was seen that3cis still significantly more active in U87 cells expressing integrin receptors. By contrast,1ckept its selectivity against HT-29 cells, but was pronouncedly more active in MCF-7 cells compared to1b.

   Click to Show/Hide
In Vitro Model Invasive breast carcinoma MCF-7 cell CVCL_0031
References
Ref 1 Kiss and Run: Promoting Effective and Targeted Cellular Uptake of a Drug Delivery Vehicle Composed of an Integrin-Targeting Diketopiperazine Peptidomimetic and a Cell-Penetrating Peptide. Bioconjug Chem. 2019 Jul 17;30(7):2011-2022. doi: 10.1021/acs.bioconjchem.9b00292. Epub 2019 Jun 19.
Ref 2 Synthesis and biological evaluation (in vitro and in vivo) of cyclic arginine-glycine-aspartate (RGD) peptidomimetic-paclitaxel conjugates targeting integrin V3. J Med Chem. 2012 Dec 13;55(23):10460-74. doi: 10.1021/jm301058f. Epub 2012 Nov 19.
Ref 3 Modularly Designed Peptide Nanoprodrug Augments Antitumor Immunity of PD-L1 Checkpoint Blockade by Targeting Indoleamine 2,3-Dioxygenase. J Am Chem Soc. 2020 Feb 5;142(5):2490-2496. doi: 10.1021/jacs.9b12232. Epub 2020 Jan 24.