Poly-L-lysine hydrobromide is widely utilized in research focused on:

• Biotechnology: It is commonly used as a cell culture substrate to enhance cell adhesion and growth, particularly for mammalian cells, improving the efficiency of bioproduction processes.
• Drug Delivery: This compound serves as a carrier for drug molecules, facilitating their transport across cell membranes, which is crucial in developing targeted therapies.
• Gene Therapy: It plays a significant role in gene delivery systems, helping to transport DNA or RNA into cells, thereby enhancing the effectiveness of gene therapy applications.
• Biomedical Research: Researchers utilize it in the development of biosensors and diagnostic tools, leveraging its properties to improve sensitivity and specificity in detecting biological markers.
• Cosmetics: The compound is incorporated into skincare products for its moisturizing properties, providing benefits such as improved skin hydration and barrier function.