Drug Target
March 5, 2026

Cluster of Differentiation 38

Mariyum Habib
Max 10 Mins Read
Target Overview
Drug Target:
Cluster of Differentiation 38
Indication area:
Hematology Immunology, Neurology
Therapeutic class:
Monoclonal Antibodies
Specific Indications:
Multiple Myeloma, Systemic Lupus Erythematosus (SLE), Light Chain (AL) Amyloidosis, Chronic Lymphocytic Leukemia (CLL)
Summary:
CD38 is a dual-function receptor and enzyme that regulates immune cell metabolism by breaking down NAD+, serving as a critical therapeutic target because its high density on diseased plasma cells allows drugs to precisely destroy harmful cells while minimizing damage to healthy tissue.

Disease Biology

Disease:
Multiple Myeloma
Prevalence:
Approximately 160,000 new cases were diagnosed globally in 2024 [Global Cancer Observatory].
Disease Mechanism:
Multiple Myeloma is a cancer that begins in the bone marrow, where a specific type of white blood cell called a plasma cell becomes cancerous. Normally, plasma cells protect us by making antibodies to fight germs. In Myeloma, these cells grow out of control and crowd out healthy blood-forming cells. These malignant cells produce abnormal proteins that can damage the kidneys and cause the blood to become too thick. Furthermore, the cancer cells send signals to the surrounding bone, causing it to break down and become fragile, leading to pain and frequent fractures. As the disease progresses, the immune system becomes weakened, making the patient highly susceptible to infections because the "good" immune cells are outnumbered by the bad ones.
Why target CD38 in Used in Multiple Myeloma?
CD38 is the Achilles heel of Multiple Myeloma because nearly every myeloma cell is covered in a massive amount of this protein. When we use a drug that targets CD38, it acts like a homing beacon for the patient’s own immune system. Once the drug attaches to CD38, it performs a triple-threat attack: it directly triggers the cell to self-destruct, it signals killer immune cells to eat the cancer, and it blocks the enzyme activity that the cancer uses to suppress the local immune environment. This makes it significantly more effective and precise than traditional chemotherapy, which attacks all fast-growing cells indiscriminately. Clinical results show that targeting CD38 can clear cancer cells even in patients who have failed multiple other types of treatment.
Disease:
Systemic Lupus Erythematosus (SLE)
Prevalence:
Approximately 3.41 million people worldwide in 2023
Disease Mechanism:
Systemic Lupus Erythematosus (SLE) is a chronic autoimmune disease where the body’s immune system loses the ability to distinguish between "self" and "foreign" invaders. In Lupus, a specific group of long-lived plasma cells becomes hyperactive and produces "auto-antibodies" that attack the body’s own DNA and healthy tissues. These cells are often resistant to standard treatments because they hide deep within the bone marrow and tissues. The resulting inflammation can strike anywhere-the skin, joints, heart, and especially the kidneys (Lupus Nephritis). Over time, the constant production of these harmful antibodies leads to permanent organ scarring and cycles of debilitating "flares" where symptoms worsen significantly.
Why target CD38 in Used in Systemic Lupus Erythematosus?
Systemic Lupus Erythematosus (SLE) is a chronic autoimmune disease where the body’s immune system loses the ability to distinguish between "self" and "foreign" invaders. In Lupus, a specific group of long-lived plasma cells becomes hyperactive and produces auto-antibodies that attack the body’s own DNA and healthy tissues. These cells are often resistant to standard treatments because they hide deep within the bone marrow and tissues.The resulting inflammation can strike anywhere-the skin, joints, heart, and especially the kidneys (Lupus Nephritis). Over time, the constant production of these harmful antibodies leads to permanent organ scarring and cycles of debilitating "flares" where symptoms worsen significantly.

Drugs In the Market

Name
CID-103 (Anti-CD38 mAb)
Company
Cellectis / Other developers
Clinical Entry
2023
Status
Early clinical development.
Current Stage
Next-generation CD38-targeting antibody being explored for multiple myeloma and other CD38-expressing malignancies, aiming for improved safety and efficacy.
Name
Darzalex Faspro (Daratumumab + Hyaluronidase)
Company
Janssen Biotech
Clinical Entry
2020
Status
FDA and EMA approved.
Current Stage
Subcutaneous formulation of daratumumab for multiple myeloma, offering faster administration and improved patient convenience with similar efficacy.
Name
Sarclisa (Isatuximab)
Company
Sanofi
Clinical Entry
2020
Status
FDA and EMA approved for multiple myeloma.
Current Stage
Anti-CD38 monoclonal antibody used in combination therapies for relapsed/refractory multiple myeloma. Works via ADCC and direct apoptosis induction.
Name
Felzartamab (MOR202)
Company
MorphoSys / Human Immunology Biosciences
Clinical Entry
2021
Status
Clinical development (Phase II/III).
Current Stage
Anti-CD38 monoclonal antibody being studied for multiple myeloma and autoimmune diseases such as membranous nephropathy.

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