Efficacy of combining pentoxiphylline and vitamin E versus vitamin E alone in non-alcoholic steatohepatitis- A randomized pilot study.
Study Goal
The researchers aimed to evaluate the efficacy of a combination of pentoxifylline (PTX) and vitamin E (VE) compared to VE alone in reducing alanine aminotransferase (ALT) levels and improving fibrosis in patients with non-alcoholic steatohepatitis (NASH).
Results Summary
Both treatment groups showed similar reductions in ALT levels, but the PTX and VE combination (PTVE) group demonstrated greater reductions in fasting insulin, HOMA-IR, and TNFα levels, as well as significant fibrosis regression compared to the VE-only group.
Population
Patients with histologically proven NASH.
Effective Dosage
PTX 400 mg thrice daily and VE 400 IU twice daily (PTVE group); VE alone (400 IU twice daily, VE group).
Duration
12 months.
Interactions
None mentioned.
| Intervention | Direction | Endpoint | Population | Dosage | Impact | Claim # |
|---|---|---|---|---|---|---|
Vitamin E (VE) | decrease | NAFLD activity score (NAS) | NASH patients | - | has shown improvement | #1 |
Vitamin E (VE) | no change | fibrosis | NASH patients | - | not | #2 |
Pentoxiphylline (PTX) | decrease | hepatic inflammation | NASH patients | - | has been reported to reduce | #3 |
Pentoxiphylline (PTX) | decrease | fibrosis | NASH patients | - | has been reported to reduce | #4 |
strict diet and lifestyle modification regimen | decrease | body mass index | histologically proven patients with NASH | - | similar reduction | #5 |
strict diet and lifestyle modification regimen | decrease | waist circumference | histologically proven patients with NASH | - | similar reduction | #6 |
PTX and VE combination (PTVE) | decrease | alanine aminotransferase (ALT) levels | histologically proven patients with NASH | - | similar reduction | #7 |
VE alone | decrease | alanine aminotransferase (ALT) levels | histologically proven patients with NASH | - | similar reduction | #8 |
PTX and VE combination (PTVE) | decrease | fasting insulin levels | histologically proven patients with NASH | - | greater reduction | #9 |
PTX and VE combination (PTVE) | decrease | homeostatic model assessment of insulin resistance (HOMA-IR) | histologically proven patients with NASH | - | greater reduction | #10 |
PTX and VE combination (PTVE) | decrease | Tumor necrosis factor alpha (TNFα) levels | histologically proven patients with NASH | - | significantly lower | #11 |
PTX and VE combination (PTVE) | decrease | NAS score | histologically proven patients with NASH | - | no difference in reduction | #12 |
VE alone | decrease | NAS score | histologically proven patients with NASH | - | no difference in reduction | #13 |
PTX and VE combination (PTVE) | decrease | fibrosis | histologically proven patients with NASH | - | significant fibrosis regression | #14 |
combination of PTX and VE | decrease | fibrosis regression | NASH patients | - | greater efficacy | #15 |
combination of PTX and VE | increase | metabolic homeostasis | NASH patients | - | better metabolic homeostasis | #16 |
combination of PTX and VE | decrease | pro-inflammatory status | NASH patients | - | amelioration | #17 |
BACKGROUND AND AIM: Non-alcoholic steatohepatitis (NASH) is the most prevalent cause of chronic liver disease. Vitamin E (VE), an anti-oxidant, has shown improvement in NAFLD activity score (NAS) but not fibrosis. Pentoxiphylline (PTX), an anti-TNF-alpha agent, has been reported to reduce hepatic inflammation and fibrosis. We evaluated combination of these drugs in NASH patients. METHODS: In a prospective study, consecutive histologically proven patients with NASH were randomized to receive either PTX, 400 mg thrice daily and VE 400 IU twice daily (group PTVE, n = 36) or VE alone (group VE, n = 33). Clinical, dietary and biochemical follow-up was done till 12 months. Primary end-point was change in alanine aminotransferase (ALT) levels. RESULTS: Both groups were comparable at baseline. On a strict diet and lifestyle modification regimen, both groups had similar reduction in body mass index and waist circumference. There was a similar reduction in ALT levels in the two groups. Metabolically, patients in PTVE group had greater reduction in fasting insulin levels and homeostatic model assessment of insulin resistance (HOMA-IR) than VE group (p = 0.05). Tumor necrosis factor alpha (TNFα) levels were also significantly lower in PTVE group from 6 months onwards. Twelve (10%) patients had repeat liver biopsy (7 in group PTVE, 5 in group VE) with no difference in reduction of NAS score (p = 0.45). However, there was a significant fibrosis regression in PTVE compared to VE group (p = 0.003). CONCLUSIONS: These data show greater efficacy of a combination of PTX and VE in achieving fibrosis regression compared to VE alone with better metabolic homeostasis and amelioration of the pro-inflammatory status. TRIAL REGISTRATION: Clinical Trials Registry no. NCT01384578.