Development of Implantable Optical Fibers for Immunotherapeutics Delivery and Tumor Impedance Measurement

Immune checkpoint blockade antibodies have promising clinical applications but suffer from disadvantages such as severe toxicities and moderate patient-response rates. None of the current delivery strategies, including local administration aiming to avoid systemic toxicities, can sustainably supply drugs over the course of weeks; adjustment of drug dose, either to lower systemic toxicities or to augment therapeutic response, is not possible. Herein, an implantable miniaturized device has been developed using electrode-embedded optical fibers with both local delivery and measurement capabilities over the course of a few weeks. The combination of local immune checkpoint blockade antibodies delivery via this device with photodynamic therapy elicits a sustained anti-tumor immunity in multiple tumor models. Named Implantable Miniature Optical Fiber Device (IMOD), this device uses tumor impedance measurement for timely presentation of treatment outcomes, and allows modifications to the delivered drugs and their concentrations, rendering IMOD as outstandingly valuable for on-demand delivery of potent immunotherapeutics without exacerbating toxicities. Rigorous studies performed using IMOD are presented and discussed in the follow chapters, followed by exploration of proposed work to expand the breadth of functions offered by this implantable biomedical platform.

Name thesis:degree_name

Doctor of Philosophy

Level thesis:degree_level

doctoral

Discipline thesis:degree_discipline

Chemical Engineering

Department dc:contributor.department

Chemical Engineering

Grantor dc:publisher

Virginia Tech

Year dc:date.issued

2021

Author dc:creator

• Chin, Ai Lin

Chair dc:contributor.committeechair

• Tong, Rong

Committee members dc:contributor.committeemember

• Jia, Xiaoting
• Lu, Chang
• Goldstein, Aaron S.

• Cancer immunotherapy
• theranostic device
• optical fiber
• tumor impedance

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language.iso

en

Dc Identifier Other

vt_gsexam:33081

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/106790