Table 1 Summary of tested putative biomarkers predictive of vaccine efficacy against opioids.

From: Mechanisms of interleukin 4 mediated increase in efficacy of vaccines against opioid use disorders

Biomarker

Antibodies

Efficacy

Opioid-specific and hapten-specific B cells24,25

↑

↑

Sex (female)

↑

↑

IL-4 depletion40

↑

↑

IL-13 depletion

No effect

No effect

IL-2R inhibition40

No effect

No effect

IL-7R inhibition40

No effect

No effect

PD-L1 activation40

No effect

No effect

ICOS activation40

No effect

No effect

TLR3 activation31

↑

↑

TLR4 activation20,34

No effect*

No effect*

TLR9 activation32

↑

↑

  1. *Sulima et al. did not directly test whether TLR4 agonists were more effective than aluminum alone.