Does biologic treatment help to treat prurigo nodularis?

Question

Hello doctor,

I have primary biliary cholangitis (PBC), and my chronic itching has worsened over time, leading to severe prurigo nodularis. Standard antihistamines and bile acid sequestrants have not helped much. My dermatologist mentioned that new biologic treatments might be an option. How effective are biologics like IL-31 or JAK inhibitors for prurigo nodularis in autoimmune liver disease? Are there any risks due to my underlying liver condition? What other advanced treatments could help manage my severe itching and nodules?

Please suggest.

Answer 1

Hello,

Welcome to icliniq.com.

I understand your concern.

Biologics targeting IL-31 (interleukin 31) like Nemolizumab and JAK inhibitors (janus kinase) like Upadacitinib or Abrocitinib have shown promise in treating prurigo nodularis (PN), including cases resistant to conventional treatments. However, given your primary biliary cholangitis (PBC), there are important considerations:

Effectiveness in prurigo nodularis with PBC:

IL-31 Inhibitors (Nemolizumab): IL-31 plays a key role in chronic itch. Nemolizumab has shown significant improvement in PN-related itching, even in patients with systemic diseases.
JAK Inhibitors (Upadacitinib, Abrocitinib, Baricitinib): These suppress inflammation and itching by blocking JAK-STAT (janus kinase-signal transducers) signaling. They are effective in PN but have potential liver-related concerns.

Liver safety considerations:

IL-31 Inhibitors: These are relatively safe with minimal liver metabolism, making them a potentially safer choice in PBC.
JAK Inhibitors: These can elevate liver enzymes and impact immune function, increasing the risk of liver decompensation in PBC. Careful monitoring of liver function tests (LFTs) is required.
Dupilumab (IL-4/IL-13 Inhibitor): Has shown effectiveness in PN and is considered relatively safe in liver disease.

Other advanced treatment options:

Rifampin (off-label for itch in liver disease): Works by modulating the opioid system and has been used for cholestatic pruritus.
Gabapentinoids (Gabapentin and Pregabalin): These can help reduce neuropathic itch and might aid with sleep.
Naltrexone (opioid antagonist): Useful for intractable cholestatic pruritus but requires liver monitoring.
Plasmapheresis or UVB (ultraviolet B) phototherapy: These can help in severe cases.
Liver transplant: In end-stage PBC, a transplant may be the only definitive cure for intractable pruritus.

I hope this has helped you.

Please feel free to reach out to me again if you have further queries.

Thank you.