Sodium 4-phenylbutyrate

📰 Sodium 4-phenylbutyrate: A Multifunctional Chemical Chaperone for ER Stress, Epigenetic, and Therapeutic Research

Published: July 31, 2026
Category: Biochemical & Pharmaceutical Research

Sodium 4-phenylbutyrate (CAS 1716-12-7), also known as 4-苯基丁酸钠盐 or 4-PBA, is a sodium salt of 4-phenylbutyric acid with the molecular formula C₁₀H₁₃NaO₂ and molecular weight 188.2. It is a white to off-white crystalline powder with excellent water solubility, making it highly suitable for cell culture and in vivo research applications.

This well-established research compound is widely recognized for its dual mechanisms of action: it functions as a chemical chaperone that alleviates endoplasmic reticulum (ER) stress, and as a histone deacetylase (HDAC) inhibitor that modulates gene expression. Consequently, it has become an indispensable tool in cell biology, neuroscience, oncology, and metabolic disease research.

🌟 Unique Biological Properties

Sodium 4-phenylbutyrate exhibits several distinctive mechanisms that make it valuable for diverse research applications:

🧬 Chemical Chaperone Activity – Stabilizes protein conformations and facilitates proper protein folding, thereby reducing ER stress and preventing the accumulation of misfolded proteins

🎯 HDAC Inhibition – Promotes histone acetylation and alters chromatin structure, leading to changes in transcriptional regulation

🩸 Ammonia Scavenging – Enhances nitrogen excretion, which is beneficial in urea cycle disorder research

🔬 Cell Permeability – Excellent water solubility and cell membrane permeability enable effective cellular studies

🔬 Research Applications

🧠 Neurodegenerative Disease Research

Sodium 4-phenylbutyrate is extensively studied in neurodegenerative disease models due to its ability to reduce ER stress and protein aggregation. It is commonly applied in:

• Alzheimer’s disease models for reducing amyloid-beta toxicity

• Parkinson’s disease research targeting α-synuclein aggregation

• Huntington’s disease studies investigating protein misfolding

• Amyotrophic lateral sclerosis (ALS) neuroprotection research

• Spinal muscular atrophy (SMA) therapeutic development

It helps researchers investigate disease mechanisms and evaluate potential therapeutic interventions for protein-misfolding disorders.

🧬 Epigenetic & HDAC Research

As an HDAC inhibitor, this compound serves as a valuable tool for epigenetic studies. Applications include:

• Chromatin remodeling and histone acetylation studies

• Transcriptional regulation and gene silencing investigations

• Stem cell differentiation and reprogramming research

• Epigenetic screening assays and mechanism studies

• Validation of HDAC activity assays

It provides researchers with a reliable positive control and mechanistic probe.

💊 Cancer Research

Owing to its HDAC inhibitory properties, sodium 4-phenylbutyrate is widely used in oncology research. Key applications include:

• Combination therapy studies with other anticancer agents

• Investigation of HDAC inhibitor mechanisms in tumor suppression

• Cancer cell differentiation and apoptosis studies

• Tumor microenvironment and drug resistance research

• Preclinical efficacy evaluation in various cancer models

It serves as a reference compound for developing novel cancer therapeutic strategies.

🩺 Metabolic Disorder Research

This compound plays an important role in metabolic disease studies. Applications include:

• Diabetes research focusing on ER stress in pancreatic β-cells

• Obesity and fatty liver disease mechanistic studies

• Urea cycle disorder research and nitrogen metabolism

• Insulin resistance and glucose metabolism investigations

• Metabolic syndrome therapeutic target validation

Its ammonia-lowering properties make it particularly valuable for hepatic and metabolic research.

🧪 Cell Culture & Protein Expression

Sodium 4-phenylbutyrate is commonly used as a cell culture supplement to enhance recombinant protein production. For example, it is added to culture media to improve protein yield and quality. Similarly, it serves as a research tool in:

• Optimization of mammalian cell culture systems

• Enhancement of monoclonal antibody production

• Investigation of ER stress pathways in cultured cells

• Development of disease cell models for drug testing

• Quality control and assay validation

🔬 Mechanisms of Action

To fully appreciate its research utility, understanding the compound’s molecular mechanisms is essential:

First, as a chemical chaperone, sodium 4-phenylbutyrate binds to hydrophobic patches on unfolded proteins, thereby preventing aggregation and promoting proper protein folding. Second, as an HDAC inhibitor, it increases histone acetylation levels, consequently activating transcription of previously silenced genes. Third, it lowers circulating ammonia levels by enhancing nitrogen excretion through alternative metabolic pathways. Together, these mechanisms explain its broad therapeutic and research potential across multiple disease areas.

📋 Product Information

🌍 Growing Demand in Biomedical Research

With the increasing prevalence of neurodegenerative diseases, metabolic disorders, and cancer worldwide, the demand for reliable research tools continues to grow. Sodium 4-phenylbutyrate remains a trusted and indispensable reagent for researchers investigating ER stress pathways, HDAC inhibition mechanisms, and therapeutic development strategies.

Furthermore, its established safety profile and oral bioavailability make it an attractive candidate for translational research and preclinical studies. As a result, it continues to be widely utilized in both academic and pharmaceutical research settings.

Supported by reliable supply capability, strict quality control, and complete technical documentation including COA, SDS, and TDS, we provide professional solutions for global biochemical and pharmaceutical research customers.