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Updated: Oct 19, 2025

Real-time Analyses of Retinol Transport by the Membrane Receptor of Plasma Retinol Binding Protein
Published on: January 28, 2013
Retinol binding protein 4 antagonists and protein synthesis inhibitors: Potential for therapeutic development
1Massachusetts College of Pharmacy and Health Sciences University, Boston, MA, USA.
Abstract:
Retinol-binding protein 4 (RBP4) is a serum protein that transports Vitamin A. RBP4 is correlated with numerous diseases and metabolic syndromes, including insulin resistance in type 2 diabetes, cardiovascular diseases, obesity, and macular degeneration. Recently, RBP4 antagonists and protein synthesis inhibitors are under development to regulate the effect of RBP4. Several RBP4 antagonists, especially BPN-14136, have demonstrated promising safety profiles and potential therapeutic benefits in animal studies. Two RBP4 antagonists, specifically tinlarebant (Belite Bio) and STG-001 (Stargazer) are currently undergoing clinical trials. Some antidiabetic drugs and nutraceuticals have been reported to reduce RBP4 expression, but more clinical data is needed to evaluate their therapeutical benefits. As regulating RBP4 levels or its activities would benefit a wide range of patients, further research is highly recommended to develop clinically useful RBP4 antagonists or protein synthesis inhibitors.
Insights
Retinol-binding protein 4 (RBP4) is linked to various diseases. Developing RBP4 antagonists offers a promising therapeutic strategy for conditions like insulin resistance and cardiovascular disease.
Area of Science:
- Biochemistry
- Endocrinology
- Pharmacology
Background:
- Retinol-binding protein 4 (RBP4) is a key serum transporter for Vitamin A.
- Elevated RBP4 levels are associated with metabolic syndromes, including insulin resistance, type 2 diabetes, cardiovascular diseases, obesity, and macular degeneration.
Purpose of the Study:
- To review the therapeutic potential of targeting RBP4.
- To highlight the development of RBP4 antagonists and protein synthesis inhibitors.
Main Methods:
- Review of preclinical and clinical studies on RBP4 antagonists.
- Analysis of existing data on drugs and nutraceuticals affecting RBP4 expression.
Main Results:
- Several RBP4 antagonists, such as BPN-14136, have shown promising safety and efficacy in animal models.
- Tinlarebant and STG-001 are RBP4 antagonists currently in clinical trials.
- Some antidiabetic drugs and nutraceuticals may reduce RBP4 expression, but require further clinical validation.
Conclusions:
- Targeting RBP4 presents a potential therapeutic avenue for a range of diseases.
- Further research is crucial for developing clinically effective RBP4 antagonists or protein synthesis inhibitors.
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