Mycophenolic Acid Pharmacokinetics and Pharmacogenomics in Lupus Nephritis

The University of Hong Kong88 enrolled

Overview

This study investigate mycophenic acid (MPA) pharmacokinetics and pharmacogenomics and their impact on the clinical outcomes in lupus nephritis (LN) patients. Lupus nephritis patients (both active or inactive) will be recruited. MPA levels will be checked at 1, 2, 4, 8, 10, 12 hrs after MMF administration by an enzymatic assay upon recruitment, then at 6-months' intervals and also when clinically significant events occurred. The MPA levels will be correlated with clinical parameters and outcomes. Pharmacogenomics studies will also be carried out and correlated with MPA exposure and clinical outcomes.

This study investigate mycophenic acid (MPA) pharmacokinetics and pharmacogenomics and their impact on the clinical outcomes in lupus nephritis (LN) patients. Lupus nephritis patients (both active or inactive) will be recruited. MPA levels will be checked at 1, 2, 4, 8, 10, 12 hrs after MMF administration by an enzymatic assay upon recruitment, then at 6-months' intervals and also when clinically significant events occurred. The MPA levels will be correlated with clinical parameters and outcomes. For active patients, the MPA levels will be correlated with treatment response (CR or PR) and side effects. For patients in remission, the MPA levels will be correlated with drug tolerability and relapse. Pharmacogenomics studies will also be carried out and correlated with MPA exposure and clinical outcomes.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Lupus Nephritis

Eligibility

Sex: ALLMin age: 18 YearsMax age: 80 Years

Medical Language ↔ Plain English

Inclusion Criteria: 1. Patients with recent active LN (biopsy-proven Class III/IV+/-V LN according to the ISN/RPS 2003 classifications within 3 months, with proteinuria \>0.5 g/day and/or active urinary sediments) who receive corticosteroids and MMF (1g bd for 6 months) as induction treatment. 2. LN patients in remission (defined as proteinuria \<0.5 g/day with inactive urinary sediment, prednisolone \<10 mg/day) and on stable MMF maintenance (dose unchanged within the previous 3 months). Exclusion Criteria: 1. Patients who receive enteric-coated mycophenolic acid (myfortic). 2. Patients who receive concomitant calcineurin inhibitors (e.g. cyclosporine or tacrolimus) other than corticosteroids and MMF. 3. Patients who receive concomitant medications which affect the MPA pharmacokinetics such as cholestyramine, acyclovir, and rifampicin. 4. Patients who are pregnant or lactating. 5. Patients with gastric emptying disorders 6. Patients with hepatic or biliary diseases

Locations (2)

Queen Mary Hospital, Hong Kong

Hong Kong, Hong Kong

United Christian Hospital

Hong Kong, Hong Kong

Outcomes

Primary Outcomes

AUC (0-12)

Time frame: 24 months

Secondary Outcomes

Infection

Time frame: 24 months

Gastrointestinal disturbances

Time frame: 24 months

Complete or partial remission

Time frame: 24 months

Relapse

Time frame: 24 months

Data from ClinicalTrials.gov

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