General Information of This Peptide-drug Conjugate (PDC)
PDC ID
PDC_00350
PDC Name
TM5
PDC Status
Investigative
Indication
In total 1 Indication(s)
Psoriasis-like inflammation
Structure
Peptide Name
SDT7
 Peptide Info 
Receptor Name
Cell membrane
Drug Name
Paradol
 Drug Info 
Therapeutic Target
Prostaglandin G/H synthase 2 (PTGS2)
 Target Info 
Linker Name
Fmoc-azido-L-alanine
 Linker Info 
Formula
C100H168N28O20
#Ro5 Violations (Lipinski): 4 Molecular Weight 2082.62
Lipid-water partition coefficient (xlogp) -1.0693
Hydrogen Bond Donor Count (hbonddonor) 24
Hydrogen Bond Acceptor Count (hbondacc) 28
Rotatable Bond Count (rotbonds) 83
Full List of Activity Data of This Peptide-drug Conjugate
Revealed Based on the Cell Line Data
Click To Hide/Show 1 Activity Data Related to This Level
Experiment 1 Reporting the Activity Data of This PDC [1]
Indication Psoriasis-like inflammation
Efficacy Data Half Maximal Inhibitory Concentration (IC50)
23.31 µM
Evaluation Method PDE Activity Colorimetric Assay
MOA of PDC
In this study, physicochemical criteria based on cell-penetrating peptides are employed to design transcellular peptides derived from an antimicrobial peptides library. Among the statistically designed transcellular peptides (SDTs), SDT7 exhibits higher skin permeability, faster kinetics, and improved cell permeability in human keratinocyte cells compared to the control peptide. Subsequently, it is found that 6-Paradol (PAR) exhibits inhibitory activity against phosphodiesterase 4, which can be utilized for an anti-inflammatory PDC.

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Description
To confirm that TM5, chemically combined with SDT7, conserves the PDE4 inhibition properties of PAR, we evaluated its dose-dependent effect using a PDE Activity Colorimetric Assay Kit. This assay relies on the principle that PDEs catalyze the hydrolysis of cyclic nucleotides, resulting in the production of nucleosides and phosphates. The concentration of 5-AMP, a product of this reaction, was measured to assess PDE activity. TM5 exhibited an IC50 of 23.31 μm, indicating its ability to inhibit PDE enzymatic activity at micromolar concentrations.

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In Vitro Model Normal HaCaT cell CVCL_0038
References
Ref 1 Peptide-Drug Conjugate with Statistically Designed Transcellular Peptide for Psoriasis-Like Inflammation. Adv Healthc Mater. 2024 Jun;13(15):e2303480. doi: 10.1002/adhm.202303480. Epub 2024 Mar 9.