The study stopped early, before enrolling its first participant.

Open-label, multicenter study in adults with Primary Biliary Cirrhosis (PBC) designed to evaluate the long-term safety and tolerability of daily dosing with LUM001.

This is an open-label study in subjects with PBC who previously completed the LUM001 201 (CLARITY) study. The study is designed to investigate the long-term safety and tolerability of LUM001 treatment, with daily dosing for up to 2 years. Changes over time, compared to baseline, in liver enzymes, other biochemical markers associated with PBC, pruritus, and other quality of life measures will also be assessed.

Inclusion Criteria:

1. Completed a core treatment protocol of LUM001 in the treatment of Primary Biliary Cirrhosis.
2. Ability to understand and willingness to sign informed consent/assent prior to initiation of any study procedures.

Exclusion Criteria:

1. Presence of advanced liver disease.
2. History of non-adherence during the subject's participation in the core LUM001 treatment protocol.