Siltuximab

Specification

• Cat#: THA-0058
• Product Name: Siltuximab
• Description: Siltuximab is an interleukin antagonist used to treat multicentric Castleman's disease (MCD) in patients who are HIV and HHV-8 negative.
• Sequences: Heavy Chain Sequence: EVQLVESGGKLLKPGGSLKLSCAASGFTFSSFAMSWFRQSPEKRLEWVAEISSGGSYTYYPDTVTGRFTISRDNAKNTLYLEMSSLRSEDTAMYYCARGLWGYYALDYWGQGTSVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKKVEPKSCDKTHTCPPCPAPELLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCKVSNKALPAPIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK Light Chain Sequence: QIVLIQSPAIMSASPGEKVTMTCSASSSVSYMYWYQQKPGSSPRLLIYDTSNLASGVPVRFSGSGSGTSYSLTISRMEAEDAATYYCQQWSGYPYTFGGGTKLEIKRTVAAPSVFIFPPSDEQLKSGTASVVCLLNNFYPREAKVQWKVDNALQSGNSQESVTEQDSKDSTYSLSSTLTLSKADYEKHKVYACEVTHQGLSSPVTKSFNRGEC
• Molecular Weight: 145000.0 Da
• Introduction: Siltuximab is a chimeric (human-mouse) monoclonal immunoglobulin G1-kappa antibody produced in a Chinese hamster ovary (CHO) cell line by recombinant DNA technology. Siltuximab prevents the binding of IL-6 to soluble and membrane-bound IL-6 receptors by forming high affinity complexes with human interleukin-6 (IL-6). Its use is indicated for the treatment of adult patients with multicentric Castleman's disease (MCD) who are human immunodeficiency virus (HIV) negative and human herpesvirus-8 (HHV-8) negative. MCD is a rare blood disorder caused by dysregulated IL-6 production, proliferation of lymphocytes, and subsequent enlargement of the lymph nodes. It is administered as a 1 hour intravenous infusion every 3 weeks.
• Purity: >99% by SDS-Page and HPLC analysis
• Formula: C6450H9932N1688O2016S50
• Appearance: Solid
• Endotoxin Level: < 0.001 EU/μg of the protein by the LAL method

Pharmaceutical Information

• Pharmacodynamics: Siltuximab-neutralized antibody-IL-6 complexes interfere with current immunological-based IL-6 quantification methods, therefore measurement of serum or plasma IL-6 concentrations should not be used as a pharmacodynamic marker during treatment. As well, cytochrome P450 enzymes in the liver are down regulated by infection and inflammation stimuli, which includes cytokines such as IL-6. By preventing IL-6 signalling through treatment with siltuximab, CYP450 activity may be increased leading to faster metabolism of drugs that are CYP450 substrates.
• Targets: Interleukin-6