General Information of This Peptide-drug Conjugate (PDC)
PDC ID
PDC_00050
PDC Name
LT7-SS-DOX
PDC Status
Investigative
Indication
In total 3 Indication(s)
Glioblastoma
Hepatoblastoma
Lung adenocarcinoma
Structure
Peptide Name
DT7
 Peptide Info 
Receptor Name
Transferrin receptor protein 1 (TFRC)
 Receptor Info 
Drug Name
Doxorubicin
 Drug Info 
Therapeutic Target
DNA topoisomerase 2-alpha (TOP2A)
 Target Info 
Linker Name
SPDP
 Linker Info 
Formula
C74H96N16O22S2
#Ro5 Violations (Lipinski): 4 Molecular Weight 1625.806
Lipid-water partition coefficient (xlogp) -1.7585
Hydrogen Bond Donor Count (hbonddonor) 19
Hydrogen Bond Acceptor Count (hbondacc) 27
Rotatable Bond Count (rotbonds) 40
Full List of Activity Data of This Peptide-drug Conjugate
Revealed Based on the Cell Line Data
Click To Hide/Show 5 Activity Data Related to This Level
Experiment 1 Reporting the Activity Data of This PDC [1]
Indication Glioblastoma
Efficacy Data Proliferation inhibitory activity
41.00%
Administration Time 48 h
Evaluation Method CCK-8 assay
MOA of PDC
Both conjugates exhibited targeted antiproliferative effects on TfR overexpressed tumor cells and little toxicity to TfR low-expressed normal cells compared with free DOX. Moreover, the DT7-SS-DOX conjugate possessed higher serum stability, more sustained reduction-triggered drug release characteristics, and stronger in vitro antiproliferative activity as compared to LT7-SS-DOX.

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Description
Even at an equal DOX concentration of 40 μM, the cell viability of the three types of tumor cells after exposure to this conjugate for 48 h were 41.0%, 61.5%, and 67.2%, respectively.
In Vitro Model Glioblastoma U87 cell CVCL_3429
Experiment 2 Reporting the Activity Data of This PDC [1]
Indication Hepatoblastoma
Efficacy Data Proliferation inhibitory activity
61.50%
Administration Time 48 h
Evaluation Method CCK-8 assay
MOA of PDC
Both conjugates exhibited targeted antiproliferative effects on TfR overexpressed tumor cells and little toxicity to TfR low-expressed normal cells compared with free DOX. Moreover, the DT7-SS-DOX conjugate possessed higher serum stability, more sustained reduction-triggered drug release characteristics, and stronger in vitro antiproliferative activity as compared to LT7-SS-DOX.

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Description
Even at an equal DOX concentration of 40 μM, the cell viability of the three types of tumor cells after exposure to this conjugate for 48 h were 41.0%, 61.5%, and 67.2%, respectively.
In Vitro Model Hepatoblastoma Hep-G2 cell CVCL_0027
Experiment 3 Reporting the Activity Data of This PDC [1]
Indication Lung adenocarcinoma
Efficacy Data Proliferation inhibitory activity
67.20%
Administration Time 48 h
Evaluation Method CCK-8 assay
MOA of PDC
Both conjugates exhibited targeted antiproliferative effects on TfR overexpressed tumor cells and little toxicity to TfR low-expressed normal cells compared with free DOX. Moreover, the DT7-SS-DOX conjugate possessed higher serum stability, more sustained reduction-triggered drug release characteristics, and stronger in vitro antiproliferative activity as compared to LT7-SS-DOX.

   Click to Show/Hide
Description
Even at an equal DOX concentration of 40 μM, the cell viability of the three types of tumor cells after exposure to this conjugate for 48 h were 41.0%, 61.5%, and 67.2%, respectively.
In Vitro Model Lung adenocarcinoma A-549 cell CVCL_0023
Experiment 4 Reporting the Activity Data of This PDC [1]
Indication Hepatoblastoma
Efficacy Data Proliferation inhibitory activity
73.10%
Administration Time 48 h
Evaluation Method CCK-8 assay
MOA of PDC
Both conjugates exhibited targeted antiproliferative effects on TfR overexpressed tumor cells and little toxicity to TfR low-expressed normal cells compared with free DOX. Moreover, the DT7-SS-DOX conjugate possessed higher serum stability, more sustained reduction-triggered drug release characteristics, and stronger in vitro antiproliferative activity as compared to LT7-SS-DOX.

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Description
The proliferation inhibitory activity of LT7-SS-DOX was the weakest among the three drugs because the cell viabilities of U87, HepG2, and A549 cells after incubation with LT7-SS-DOX (equal DOX concentration of 20 μM) for 48 h were 95.1%, 73.1%, and 83.2%, respectively.
In Vitro Model Hepatoblastoma Hep-G2 cell CVCL_0027
Experiment 5 Reporting the Activity Data of This PDC [1]
Indication Lung adenocarcinoma
Efficacy Data Proliferation inhibitory activity
83.20%
Administration Time 48 h
Evaluation Method CCK-8 assay
MOA of PDC
Both conjugates exhibited targeted antiproliferative effects on TfR overexpressed tumor cells and little toxicity to TfR low-expressed normal cells compared with free DOX. Moreover, the DT7-SS-DOX conjugate possessed higher serum stability, more sustained reduction-triggered drug release characteristics, and stronger in vitro antiproliferative activity as compared to LT7-SS-DOX.

   Click to Show/Hide
Description
The proliferation inhibitory activity of LT7-SS-DOX was the weakest among the three drugs because the cell viabilities of U87, HepG2, and A549 cells after incubation with LT7-SS-DOX (equal DOX concentration of 20 μM) for 48 h were 95.1%, 73.1%, and 83.2%, respectively.
In Vitro Model Lung adenocarcinoma A-549 cell CVCL_0023
References
Ref 1 New Transferrin Receptor-Targeted Peptide-Doxorubicin Conjugates: Synthesis and In Vitro Antitumor Activity. Molecules. 2024 Apr 12;29(8):1758. doi: 10.3390/molecules29081758.