🧬 We used thalidomide for years in myeloma…
without knowing why it worked.
Not the target.
Not the pathway.
Just the clinical signal.
Now we know—and it’s not chemotherapy.
IMiDs are cereblon-directed protein degraders:
→ Bind CRBN
→ Degrade IKZF1 (Ikaros) & IKZF3 (Aiolos)
From that single mechanism:
🛡️ Immune system
↑ IL-2
↑ T-cell / NK activation
↓ regulatory T-cell (Treg) function
💥 Tumor cell
↓ IRF4 / MYC
→ collapse of survival program
→ cell death
👉 One pathway. Two effects.
👉 Not contradictory—reprogramming biology
🚀 CELMoDs? Same pathway. Stronger signal.
→ Higher affinity to cereblon
→ Deeper IKZF1/3 degradation
→ Activity even after IMiD failure
💡 This is the shift
Not: “Does the drug kill the tumor?”
But:
👉 “How does it rewire the system?”
👇 Figure: IMiD → immune + tumor effects → CELMoD amplification
#myeloma#Hemetwitter