Skip to main content
Open Access Publications from the University of California


UC San Francisco Previously Published Works bannerUCSF

Picoliter-volume inkjet printing into planar microdevice reservoirs for low-waste, high-capacity drug loading.

  • Author(s): Fox, Cade B;
  • Nemeth, Cameron L;
  • Chevalier, Rachel W;
  • Cantlon, Joshua;
  • Bogdanoff, Derek B;
  • Hsiao, Jeff C;
  • Desai, Tejal A
  • et al.

Oral delivery of therapeutics is the preferred route for systemic drug administration due to ease of access and improved patient compliance. However, many therapeutics suffer from low oral bioavailability due to low pH and enzymatic conditions, poor cellular permeability, and low residence time. Microfabrication techniques have been used to create planar, asymmetric microdevices for oral drug delivery to address these limitations. The geometry of these microdevices facilitates prolonged drug exposure with unidirectional release of drug toward gastrointestinal epithelium. While these devices have significantly enhanced drug permeability in vitro and in vivo, loading drug into the micron-scale reservoirs of the devices in a low-waste, high-capacity manner remains challenging. Here, we use picoliter-volume inkjet printing to load topotecan and insulin into planar microdevices efficiently. Following a simple surface functionalization step, drug solution can be spotted into the microdevice reservoir. We show that relatively high capacities of both topotecan and insulin can be loaded into microdevices in a rapid, automated process with little to no drug waste.

Many UC-authored scholarly publications are freely available on this site because of the UC's open access policies. Let us know how this access is important for you.

Main Content
For improved accessibility of PDF content, download the file to your device.
Current View