#1 Clinical Trials Search in Europe

Phenylbutyrate

Phenylbutyrate is a drug that has shown potential in treating various medical conditions. This article explores the use of phenylbutyrate in clinical trials for different disorders, including urea cycle disorders, metabolic conditions, and neurological diseases. We’ll look at how this medication is being studied and its potential benefits for patients.

Table of Contents

What is Phenylbutyrate?

Phenylbutyrate is a medication that has been used to treat various medical conditions. It is also known by other names such as sodium phenylbutyrate, HPN-100, BUPHENYL®, and NaPBA[1]. This drug is primarily used as an adjunctive therapy, which means it is used in combination with other treatments to manage certain disorders[1].

Conditions Treated with Phenylbutyrate

Phenylbutyrate has been studied and used for several medical conditions, including:

  • Urea Cycle Disorders (UCDs): These are genetic disorders that affect how the body processes nitrogen. Phenylbutyrate helps manage these conditions by providing an alternative way for the body to remove excess nitrogen[1].
  • Medium Chain Acyl-CoA Dehydrogenase Deficiency (MCADD): This is a rare genetic disorder that affects how the body breaks down certain fats. Research is being conducted to see if phenylbutyrate can help treat this condition[2].
  • Amyotrophic Lateral Sclerosis (ALS): Also known as Lou Gehrig’s disease, ALS is a progressive neurological disease. Studies are exploring whether phenylbutyrate can help slow the progression of ALS[3].
  • Spinocerebellar Ataxia Type 3 (SCA3): This is a genetic disorder that affects movement. Research is being done to determine if phenylbutyrate can help manage symptoms of SCA3[4].
  • Spinal Muscular Atrophy (SMA): SMA is a genetic disorder affecting muscle strength and movement. Studies are investigating if phenylbutyrate can increase the production of a protein that is lacking in people with SMA[5].
  • Brain Tumors: Some research is exploring the potential of phenylbutyrate in treating certain types of brain tumors in children[6].

How Phenylbutyrate Works

Phenylbutyrate works in different ways depending on the condition being treated:

  • For Urea Cycle Disorders, it provides an alternative pathway for removing excess nitrogen from the body[1].
  • In conditions like ALS and SMA, it may help increase the production of certain proteins that are lacking or not functioning properly[3][5].
  • For brain tumors, it may help slow down tumor growth or induce tumor cell death[6].

How Phenylbutyrate is Administered

Phenylbutyrate can be administered in several ways:

  • Oral tablets or powder: This is the most common form for treating Urea Cycle Disorders[1].
  • Continuous intravenous infusion: This method is being studied for conditions like brain tumors[6].
  • Liquid form: Some studies are using a liquid form of the medication[2].

The dosage and administration method can vary depending on the condition being treated and the individual patient’s needs. Always follow your doctor’s instructions carefully when taking this medication.

Potential Side Effects

Like all medications, phenylbutyrate can cause side effects. Some potential side effects include:

  • Nausea and vomiting
  • Changes in liver function
  • Changes in blood cell counts
  • Fatigue
  • Headache

It’s important to note that not everyone experiences side effects, and the severity can vary from person to person. Your doctor will monitor you closely for any adverse reactions while you’re taking this medication[4].

Ongoing Research and Future Potential

Phenylbutyrate is still being studied for its potential in treating various conditions. Ongoing research includes:

  • Its use in treating obesity and prediabetes by affecting certain amino acids in the body[7].
  • Its potential in treating inherited cholestatic diseases, which are liver conditions affecting bile flow[8].
  • Further studies on its effectiveness in treating rare genetic disorders and neurological conditions[2][3].

As research continues, we may discover more uses for this versatile medication. If you think phenylbutyrate might be helpful for your condition, discuss it with your healthcare provider to see if it’s an appropriate treatment option for you.

Aspect Details
Drug Name Phenylbutyrate (also known as sodium phenylbutyrate)
Conditions Studied Urea Cycle Disorders, MCADD, Pyruvate Dehydrogenase Complex Deficiency, Spinocerebellar Ataxia Type 3, Spinal Muscular Atrophy, Brain Tumors
Administration Methods Oral (tablets, powder, liquid), Continuous intravenous infusion
Dosage Range Varies by study, from 3.0 g/m²/day to 21 g/day
Common Side Effects Nausea, vomiting, changes in blood tests
Study Durations 4 weeks to 12 months
Key Measurements Blood levels of drug, biomarkers (e.g., SMN protein), safety assessments, efficacy measures specific to each condition

FAQ

  • What is phenylbutyrate and how does it work? Phenylbutyrate is a drug that helps the body remove excess nitrogen. It works by providing an alternative way for the body to get rid of nitrogen, which is important for people with certain metabolic disorders. In some conditions, it may also help increase the production of important proteins or affect gene expression.
  • What conditions are being studied with phenylbutyrate in clinical trials? Clinical trials are exploring the use of phenylbutyrate for various conditions, including urea cycle disorders, medium-chain acyl-CoA dehydrogenase deficiency (MCADD), pyruvate dehydrogenase complex deficiency, spinocerebellar ataxia type 3, spinal muscular atrophy, and certain brain tumors in children.
  • How is phenylbutyrate administered in these trials? The administration of phenylbutyrate varies depending on the study. Some trials use oral forms (tablets, powder, or liquid), while others use continuous intravenous infusion. The dosage and frequency also vary based on the condition being treated and the specific trial design.
  • What are some potential side effects of phenylbutyrate? Common side effects may include nausea, vomiting, and changes in blood tests. More serious side effects can include changes in heart rhythm or liver function. The trials closely monitor patients for any adverse events to ensure safety.
  • How long do these clinical trials typically last? The duration of clinical trials for phenylbutyrate varies. Some studies last for a few weeks, while others may continue for several months or even up to a year. The length depends on the specific condition being studied and the goals of the trial.

Ongoing Clinical Trials on Phenylbutyrate

  • Study on the Effects of AMX0035 (Phenylbutyrate and Ursodoxicoltaurine) in Patients with Progressive Supranuclear Palsy

    Not recruiting

    1 1
    Investigated diseases:
    Investigated drugs:
    Austria Belgium Bulgaria France Germany Italy +4

  • Study on the Safety and Effectiveness of AMX0035 (Phenylbutyrate and Ursodoxicoltaurine) for Adults with Amyotrophic Lateral Sclerosis (ALS)

    Not recruiting

    1 1
    Investigated diseases:
    Investigated drugs:
    Belgium France Germany Ireland Italy The Netherlands +4

Glossary

  • Urea Cycle Disorders: A group of genetic disorders that affect how the body removes nitrogen waste, leading to a buildup of ammonia in the blood.
  • Medium-chain Acyl-CoA Dehydrogenase Deficiency (MCADD): A rare genetic condition where the body can't break down certain fats for energy, which can lead to serious health problems.
  • Pyruvate Dehydrogenase Complex Deficiency: A rare genetic disorder that affects how the body processes carbohydrates, leading to a buildup of lactic acid.
  • Spinocerebellar Ataxia Type 3: A genetic disorder that causes progressive problems with movement, balance, and coordination.
  • Spinal Muscular Atrophy: A genetic disorder characterized by weakness and wasting in muscles used for movement.
  • Pharmacokinetics: The study of how a drug moves through the body, including how it's absorbed, distributed, metabolized, and eliminated.
  • Dose-Limiting Toxicity: Side effects of a drug that are severe enough to prevent increasing the dose or require stopping the treatment.
  • Biomarker: A measurable indicator of a biological state or condition, often used to track the effects of a treatment.
  • Continuous Infusion: A method of giving medication through a vein continuously over a period of time, often using a pump.
  • Open-Label Study: A type of clinical trial where both the researchers and participants know which treatment is being given.

References

  1. https://clinicaltrials.gov/study/NCT00551200
  2. https://clinicaltrials.gov/study/NCT06069375
  3. https://clinicaltrials.gov/study/NCT00107770
  4. https://clinicaltrials.gov/study/NCT01096095
  5. https://clinicaltrials.gov/study/NCT00439218
  6. https://clinicaltrials.gov/study/NCT00006450
  7. https://clinicaltrials.gov/study/NCT05028803
  8. https://clinicaltrials.gov/study/NCT04531878