Bone and metal targeted polymeric nanoparticles (US20150125391 A1): a patent evaluation

ABSTRACT

Introduction: Delivery of therapeutic agents to bone is crucial for the treatment of bone metastasis and other bone diseases. The present invention patent relates to bone- and metal-targeted polymeric nanoparticles for targeting delivery of therapeutic molecules to the pathological tissues in bone or the surgical metal implant-bone tissue interface.

Areas covered: The nanoparticles for drug delivery were fabricated via the assembly of amphiphilic polymers, in which the hydrophilic outer layer was minimal to prolong the circulation time, and the hydrophobic insider core was biodegradable and loaded with therapeutic agents. Bone-targeted elements were conjugated on the nanoparticle surface to enhance their affinity to bone and/or metal implant surface.

Expert opinion: A prolonged, sustained release of therapeutic agents was observed by using the delivery system targeting to bone. The described invention provides a bone-targeted vector to deliver diverse therapeutic agents to bone.

KEYWORDS:

• Bone targeting
• polymeric nanoparticles
• drug delivery
• bone metastases
• bone-related diseases

Declaration of interest

The authors have no relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript. This includes employment, consultancies, honoraria, stock ownership or options, expert testimony, grants or patents received or pending, or royalties.

Additional information

Funding

The authors were supported by the Basic Research Program of Science and Technology Commission of Shanghai Municipality (14JC1491100), the Shanghai Pujiang Program (Grant No.14PJD016), and the Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20120076120027).