Dostarlimab

Specification

• Cat#: THA-0134
• Product Name: Dostarlimab
• Description: Dostarlimab is an anti-PD-1 monoclonal antibody used in the treatment of mismatch repair deficient endometrial cancers and solid tumours with no alternative treatment options.
• Sequences: Heavy Chain: EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYDMSWVRQAPGKGLEWVSTISGGGSYTYYQDSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCASPYYAMDYWGQGTTVTVSSASTKGPSVFPLAPCSRSTSESTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTKTYTCNVDHKPSNTKVDKRVESKYGPPCPPCPAPEFLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSQEDPEVQFNWYVDGVEVHNAKTKPREEQFNSTYRVVSVLTVLHQDWLNGKEYKCKVSNKGLPSSIEKTISKAKGQPREPQVYTLPPSQEEMTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSRLTVDKSRWQEGNVFSCSVMHEALHNHYTQKSLSLSLGK Light Chain: DIQLTQSPSFLSAYVGDRVTITCKASQDVGTAVAWYQQKPGKAPKLLIYWASTLHTGVPSRFSGSGSGTEFTLTISSLQPEDFATYYCQHYSSYPWTFGQGTKLEIKRTVAAPSVFIFPPSDEQLKSGTASVVCLLNNFYPREAKVQWKVDNALQSGNSQESVTEQDSKDSTYSLSSTLTLSKADYEKHKVYACEVTHQGLSSPVTKSFNRGEC
• Molecular Weight: 144000.0 Da (non-glycosylated)
• Introduction: Dostarlimab is an IgG4 humanized monoclonal antibody targeted against the human programmed death receptor-1 (PD-1). PD-1 receptors are found on T-cells and, when activated, serve to inhibit immune responses-some cancers leverage this system by overexpressing PD-1 ligands, thereby effectively inhibiting the anti-tumor immune response that would typically attempt to destroy the cancerous cells. Agents acting on the PD-1 pathway, such as nivolumab and pembrolizumab, facilitate endogenous immune-mediated anti-tumor activity and may therefore be used to treat a wide variety of cancers, including those of the skin, lung, kidneys, and liver. In April 2021, dostarlimab was granted accelerated approval by the FDA-as GlaxoSmithKline's dostarlimab-gxly (Jemperli)-for the treatment of adult patients with recurrent or advanced mismatch repair deficient (dMMR) endometrial cancer experiencing disease progression despite treatment with platinum-containing chemotherapy regimens. A companion diagnostic device-the VENTANA MMR RxDx Panel-was also approved alongside this indication to select appropriate patients for treatment. This indication was granted full FDA approval on February 10, 2023. Dostarlimab-gxly was granted second accelerated approval for the treatment of solid tumours in the same month. Dostarlimab is currently under investigation for the treatment of rectal cancers with mismatch repair deficiency. A prospective phase II study in patients with mismatch repair-deficient locally advanced rectal cancer resulted in all twelve patients exhibiting a complete clinical response.
• Purity: >99% by SDS-Page and HPLC analysis
• Formula: C6420H9832N1680O2014S44
• Appearance: Solid

Pharmaceutical Information

• Pharmacodynamics: Dostarlimab is an immunotherapy that facilitates the body's endogenous anti-tumor immune response in the treatment cancer. It is administered over a span of 30 minutes via intravenous infusion every three to six weeks depending on the cycle. Agents that interfere with the PD-1/PD-L1 pathway, including dostarlimab, remove an important immune system inhibitory response and may therefore induce immune-mediated adverse reactions which can be severe or fatal. These reactions can occur in any organ system and can occur at any time after starting therapy, and while they most often manifest during therapy they may also appear after discontinuing the causative agent. Patients receiving therapy with dostarlimab should be monitored closely for evidence of an underlying immune-mediated reaction and evaluated and treated promptly if an immune-mediated reaction is suspected.
• Targets: Programmed cell death protein 1