ADC- Creation of Cytotoxic Payload Poster
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Transcript of ADC- Creation of Cytotoxic Payload Poster
Objective
Fig 1: Standard Antibody Drug Conjugate
Fig 7: LC/MS of conjugate, product impure with traces of doxorubicin and linker. M/z ratio of product 1142.6, linker 736.5 and doxorubicin 544.3 Fig 6: Thin Layer Chromatography (TLC) Plate
Doxorubicin
Fig 2: ADC Mechanism of Action
Fig 3: Doxorubicin Topoisomerase II Inhibition
Fig 4: Silica Column
Linker
Attachment Group Val CitSpacer
Fig 5: Schematic of drug and linker conjugated product
Fig 8: Attachment group conjugated to Trastuzumab
Introduction Materials and Methods
Results
Conclusion
Acknowledgements
References
Future Direction
Rf ValuesDox: 0 (Dox)Dox+Rxn Mixture: 0.5 (Conjugate)Rxn Mixture: 0.5 (Linker)
Background
Linker Drug
Synthesis of a Novel Linker, MC-val-cit-PAB-PNP, for Payload of ADC
Zoe Vaughn, Alexandra Van Hall, Dr. Dhavalkumar ShahDepartment of Pharmaceutical Sciences, University at Buffalo, Buffalo, NY
• Measure the effectiveness of the linker, doxorubicin conjugate via conjugation to antibody, Trastuzumab
• Create an ADC with linker, doxorubicin and Trastuzumab conjugate
• Test effectiveness of ADC via cultured cancer cells
• TLC plate indicates conjugate in fraction 6, with Rf value of 0.5 (Fig 6)
• LC/MS indicates impure conjugate with m/z value of 1146.2 consistent with [4] (Fig 7)
1. Ducry, Laurent, and Bernhard Stump. "Antibody-Drug Conjugates: Linking Cytotoxic Payloads to Monoclonal Antibodies." Bioconjugate chemistry 21.1 (2010): 5-13. Print.
2. Jain, Nareshkumar, et al. "Current Adc Linker Chemistry." Pharmaceutical research 32.11 (2015): 3526-40. Print
3. Francisco, Joseph A., et al. "Cac10-Vcmmae, an Anti-Cd30–Monomethyl Auristatin E Conjugate with Potent and Selective Antitumor Activity." Blood 102.4 (2003): 1458-65. Print.
4. Dubowchik, Gene M., et al. "Cathepsin B-Labile Dipeptide Linkers for Lysosomal Release of Doxorubicin from Internalizing Immunoconjugates: Model Studies of Enzymatic Drug Release and Antigen-Specific in Vitro Anticancer Activity." Bioconjugate Chemistry 13.4 (2002): 855-69. Print.
Antibody drug conjugates (ADC’s) are gaining popularity due to their ability for targeted cancer cell therapy which lessens adverse side effects to normal tissue. A suitable payload and linker antibody combination is very important for successful targeted therapy. [1]
• Shah Lab • National Science Foundation
LC/MS used to identify the continence of the purified product (Fig 7)
TLC plates used to identify purified product. Conjugate presentin fraction 6 (Fig 6)
Silica column created (Fig 4). Diluted product purified through column 7 fractions collected
Completed reaction product frozen and centrifugedcrashing out solid product
Stir reactants in dark for approximately 2 days
Reactants: MC-Val-Cit-PAB-PNP linker, Doxorubicin, DIEA base, HOBt catalyst
To synthesize a novel linker, MC-val-cit-PAB-PNP, for payload of ADC.