Target intelligence / Profile preview

CD33 Sialic Acid Binding Ig Like Lectin (CD33)

Target
CD33
Molecular classification
Receptor, Sialic-acid-binding Ig-like lectin (SIGLEC), Immunoglobulin superfamily, Transmembrane protein
01

Overview

CD33 is a transmembrane receptor belonging to the SIGLEC family, predominantly expressed on myeloid cells. It functions as an inhibitory receptor by binding to sialic acid-bearing glycans and recruiting phosphatases via ITIM motifs, thereby dampening immune cell activation. Its high expression in AML makes it a target for antibody-based therapies and CAR-T cell therapy.

Other names
Siglec-3SIGLEC3Sialic acid-binding Ig-like lectin 3gp67p67
02

Mechanism of action

Anti-CD33 antibodies bind to CD33, leading to cell death through antibody-dependent cellular cytotoxicity (ADCC), complement-dependent cytotoxicity (CDC), or direct apoptosis induction. Antibody-drug conjugates deliver cytotoxic payload upon internalization. CAR-T cells expressing anti-CD33 chimeric antigen receptors specifically target and kill CD33-expressing cells.

03

Biological functions

Innate immune system regulationRegulation of phagocytosisRegulation of cytotoxicitySignal transductionModulation of immune cell activationApoptosis
04

Disease associations

Acute Myeloid Leukemia (AML)Cardiovascular disease
05

Safety considerations

MyelosuppressionCytokine release syndrome (CRS)Veno-occlusive disease (VOD)Infusion-related reactions
06

Interacting drugs

Anti-CD33 monoclonal antibodies

1 more in the full profile.

07

Biomarkers

CD33 expression level in AML blastsMinimal residual disease (MRD)

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