BCAA vs. Rifaximin in Patients With Cirrhosis for Secondary Prophylaxis of HE

Branch Chain Amino Acids vs. Rifaximin in Patients With Cirrhosis for Secondary Prophylaxis of Hepatic Encephalopathy: Double-blind Placebo-controlled Multicentric Randomized Controlled Trial

Rationale

• Patients who recover from an episode of overt HE(OHE) are at risk of recurrent episodes of HE and persistent minimal hepatic encephalopathy, impacting their daily functioning and mental health.
• A multicentric pan-India team will evaluate the role of oral branched-chain amino acids (BCAA) vs Rifaximin as secondary prophylaxis following overt HE as compared with improvement in cognitive function.

Novelty:

• This study is intended to investigate the role of BCAA vs rifaximin as the ideal second-line therapy for HE management, recurrence, and overall health, including cognitive function, depression and anxiety.
• The head-to-head comparison of BCAA+lactulose+ pill-placebo vs rifaximin+ lactulose+ powder-placebo ensures minimization of bias and has adequate power to determine rates of recurrence,

Objectives:

• To assess the 1st breakthrough episode of HE during 6months in BCAA vs rifaximin groups as ideal secondary prophylaxis in HE. Methodology
• Double-blind placebo-controlled double-dummy randomized trial of BCAA supplementation vs rifaximin as the ideal second-line therapy in patients with cirrhosis who have recovered from an episode of OHE. Expected Outcome
• Ideal second line agent HE prophylaxis (rifaximin or BCAA) following 1st line lactulose is unclear in an Indian context where dysbiosis and sarcopenia are prevalent, and cost of therapy needs to be optimized.
• Optimal HE management prevents recurrence episodes of HE, and improves prognosis, neurocognitive function, and overall health-related quality of life(HRQOL).
• Creation of a management algorithm based deductive models incorporating etiology and severity of liver disease, cognitive performance, sarcopenia, and ammonia, and neuropsychiatric impact of using BCAA vs Rifaximin will be created.

Hepatic encephalopathy (HE), a complex neuropsychiatric syndrome arising from liver dysfunction and the establishment of portosystemic shunts (PSS), presents a significant clinical challenge, marked by a spectrum of cognitive, emotional, and motor disturbances. These conditions necessitate precise diagnostic and therapeutic approaches to mitigate its impact on patient well-being and quality of life.

• The prevalence of OHE at the time of diagnosis of cirrhosis is 10%-14% in general, 16%-21% in those with decompensated cirrhosis. The cumulated numbers indicate that OHE will occur in 30%-40% of those with cirrhosis at some time during their clinical course and in the survivors in most cases repeatedly. Minimal HE (MHE) or covert HE (CHE) occurs in 20%-80% of patients with cirrhosis. This high incidence rate calls for effective, accessible, and cost-efficient treatment modalities to improve patient outcomes and quality of life.
• Indian patients have sarcopenia and reduced muscle strength impairing peripheral ammonia metabolism, and also have gut dysbiosis which can predispose to another episode of HE. A critical initial step in addressing HE involves the identification of precipitating factors, with evidence suggesting that reversible elements contribute to over 80% of HE cases.
• Current therapeutic interventions primarily target the reduction of blood ammonia levels, yet the effectiveness of these treatments varies, underscoring the necessity for ongoing research and innovation in HE management.
• Patients recovering from OHE are at risk of recurrent episodes and may suffer from persistent MHE, a condition often undiagnosed due to its subtle cognitive manifestations. Such individuals may have cognitive impairment that affect patients' daily functioning and mental health, necessitating the development of standardized diagnostic psychometric tests protocols tailored to diverse populations.
• Mainstay for treatment of HE has been lactulose or lactitol. How lactulose acts in HE has been a matter of debate and various hypotheses have been postulated. Inglefenger et al., suggested it to be due to proliferation of Lactobacillus with inhibition of Bacteroides and other organisms (28). Lactulose has pleiotropic effects, and reduction of ammonia is only one of the ways in which it acts on HE.
• Rifaximin is an oral antibiotic having <0.4% of systemic absorption. It acts against coliforms like Escherichia coli and plays a role in the reduction of ammonia levels and prevention of recurrence of HE . Several trials have compared Rifaximin as a therapy of HE with placebo, neomycin and non-absorbable disaccharides . Rifaximin emerged as a promising alternative, showing comparable efficacy in managing OHE and preventing its recurrence..
• This is a double-blind, randomized placebo-controlled trial of branched-chain amino acid supplementation vs rifaximin as the ideal second-line therapy in patients with cirrhosis who have recovered from an episode of overt hepatic encephalopathy, with either drug given over 12 weeks with endpoints being prevention of recurrence of another episode of HE, efficacy, safety, and improvement in neurocognitive function

Inclusion Criteria:

1. Cirrhosis defined by standard clinical, ultrasonographic findings and/or histological criteria. Cirrhosis of any etiology may be included. However, patients with cirrhosis due to autoimmune hepatitis must be on stable corticosteroid doses for ≥3-month period before study inclusion; those with viral hepatitis, must similarly be on anti-viral therapy with controlled viremia or with SVR.
2. Any gender
3. Discharged from the hospital following an episode of overt hepatic encephalopathy.
4. Participants able to give informed consent

Exclusion Criteria:

1. Subjects with active bacterial or fungal infection

2. Subjects with active or very recent gastrointestinal bleeding in the last 2 weeks.

3. Current overt hepatic encephalopathy, defined as grade II-IV hepatic encephalopathy according to the West-Haven classification.

4. Conditions that can impact interpretation of cognitive function:

   i) Untreated viremic hepatitis C virus infection ii) Established neurological/degenerative disorders iii) Patient undergoing active alcohol withdrawal treatment Iv) Patient is intoxicated or under the influence of illicit drugs as per clinician assessment V) Treatment with antipsychotics or other psychotropic drugs with sedative effects

5. Patients with active hepatocellular carcinoma or history of hepatocellular carcinoma that is in remission for less than six months.

6. Patients with a history of significant extrahepatic disease with impaired short-term prognosis, including: i) Congestive heart failure New York Heart Association Grade III/IV or ejection fraction<30% ii) COPD: GOLD >2, ii) Chronic kidney disease with serum creatinine >2mg/dL or under renal replacement therapy.

7. Patients with current extra hepatic malignancies, including solid tumours and hematologic disorders.

8. Patients with MELD>20

9. Patients with mental incapacity, or those unlikely to survive 12 weeks or any other reason considered by the investigator precluding adequate understanding, cooperation, or compliance in the study activities.

10. Patients with TIPS shunt in situ

11. Pregnancy (urine pregnancy test at inclusion)

12. Refusal or inability to give informed consent