==== Reference: Usmani SS, Bedi G, Samuel JS, Singh S, Kalra S, Kumar P, et al. (2017) THPdb: Database of FDA-approved peptide and protein therapeutics. PLoS ONE 12(7) e0181748.====

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1025 details
Primary information
ThPP IDTh1004
Therapeutic Peptide/Protein NameDenileukin diftitox
SequenceMGADDVVDSSKSFVMENFSSYHGTKPGYVDSIQKGIQKPKSGTQGNYDDD view full sequnce in fasta
Functional ClassificationIIb
Molecular Weight57647.3
Chemical FormulaC2560H4042N678O799S17
Isoelectric Point5.45
Hydrophobicity-0.301
Melting Point (℃)N.A.
Half Life1.16-1.3 hours
DescriptionA recombinant (using E. coli expression system) DNA-derived cytotoxic protein containing amino acid sequences for diphtheria toxin fragments A and B (Met 1-Thr 387)-His and sequences for interleukin-2 (Ala 1-Thr 133).
Indication/DiseaseUsed in the treatment of cutaneous T-cell lymphoma.
PharmacodynamicsDenileukin diftitox (Ontak) uses the cytocidal action of diphtheria toxin on cells which express the IL-2 receptor. The human IL-2 receptor exists in three forms on basis of affinity, low (CD25), intermediate (CD122/CD132) and high (CD25/CD122/CD132). Malignant cells expressing one or more of the subunits of the IL-2 receptor are found in certain leukemias and lymphomas including cutaneous T-cell lymphoma (CTCL). Ontak interacts with the high affinity IL-2 receptor on the cell surface and inhibits cellular protein synthesis, resulting in cell death within hours.
Mechanism of ActionDenileukin diftitox binds to the high-affinity IL-2 receptor. The IL-2 receptor (Tac) subunit is expressed on activated lymphocytes. The diphtheria toxin associated with Ontak selectively kills the IL-2 bearing cells.
ToxicityN.A.
MetabolismN.A.
AbsorptionN.A.
Volume of Distribution0.06 to 0.09 L/kg
Clearance0.6 - 2.0 mL/min/kg [Lymphoma]
CategoriesAntineoplastic Agents
Patents NumberN.A.
Date of IssueN.A.
Date of ExpiryN.A.
Drug InteractionRilonacept decreases effects of toxoids by pharmacodynamic antagonism
TargetInterleukin-2 receptor subunit alpha,Interleukin-2 receptor subunit beta,Cytokine receptor common subunit gamma
Information of corresponding available drug in the market
Brand NameOntak
CompanySeragen Inc
Brand DiscriptionOntak is a recombinant DNA-derived cytotoxic protein composed of the amino acid sequences of diphtheria toxin fragments A and B (Met1-Thr387)-His followed by sequences for human interleukin-2 (IL-2; Ala1-Thr133)
Prescribed forTreating leukemia and lymphomas, including cutaneous (of the skin) T-cell lymphoma.
Chemical NameN.A.
FormulationOntak contains 300 mcg of recombinant denileukin diftitox in a sterile solution of citric acid (20 mM), EDTA (0.05 mM) and polysorbate 20 ( < 1%) in Water for Injection, USP. The solution has a pH range of 6.9-7.2.
Physcial AppearnceSterile, white, preservative-free, lyophilized powder.
Route of AdministrationIntravenous (Intravenous) administration
Recommended DosageN.A.
Contraindicationallergic
Side EffectsCommon side effects include:headache, dizziness, or nervousness, numbness or tingling, skin itching or rash, runny or stuffy nose; weight gain or loss; mild diarrhea or constipation, or nausea, vomiting, loss of appetite.
Useful Linkhttp://www.drugs.com/mtm/ontak.html
PubMed ID17454642, 17187516
3-D StructureTh1004 (View) or (Download)