Intracellular Paired Agent Imaging (iPAI) Enables Personalized Therapy Selection for Cancer Patients

ASPIRE Award (2018-2020)

Summer Gibbs, PhD, Oregon Health & Science University (Principal); Kimberley Samkoe, PhD, Dartmouth College; and Kenneth Tichauer, PhD, Illinois Institute of Technology

Understanding how a drug will function in an individual patient is challenging. The available amount of a drug’s molecular target may vary from patient to patient, the drug may bind its target differently in each patient, and individual patients could respond uniquely to drug-target recognition. This variability makes developing drugs and choosing treatments for specific patients unpredictable. There are currently no optimal model systems to address this issue. Dr. Summer Gibbs of Oregon Health & Science University is working collaboratively with teams from Dartmouth College and the Illinois Institute of Technology to develop a system that will predict a therapy’s effectiveness and uncover potential toxic side effects. This method, called intracellular paired agent imaging (iPAI), makes use of fluorescently labelled molecules to quantify the presence of intracellular drug targets, drug accumulation, and protein signaling in tissues derived directly from the patient. iPAI will provide information on drug behavior simultaneously across a pathway, link target binding with pharmacokinetic response, and ultimately predict an individual’s therapeutic outcomes. When used in the clinic, iPAI could improve cancer therapy selection and provide better understanding of resistance to treatment.

published research

Samkoe KS, Schultz E, Solanki A, Wang L, Korber J, Tichauer KM, Gibbs SL. Simultaneous Extracellular and Intracellular Quantification of EGFR Using Paired-Agent Imaging in an In Ovo Tumor Model. Proc SPIE Int Soc Opt Eng. 2019 Feb.

Solanki A, Wang L, Korber J, McMahon N, Tichauer K, Samkoe KS, Gibbs SL. Intracellular Paired agent Imaging Enables Improved Evaluation of Tyrosine Kinase Inhibitor Target Engagement. Proc SPIE Int Soc Opt Eng. 2020 Feb.

McMahon NP, Solanki A, Jones J, Kwon S, Chang YH, Chin K, Nederlof MA, Gray JW, Gibbs SL. Fluorescent Imaging for In Situ Measurement of Drug Target Engagement and Cell Signaling Pathways. Proc SPIE Int Soc Opt Eng. 2020 Feb.

McMahon NP, Solanki A, Wang LG, Montaño AR, Jones JA, Samkoe KS, Tichauer KM, Gibbs SL. TRIPODD: a Novel Fluorescence Imaging Platform for In Situ Quantification of Drug Distribution and Therapeutic Response. Mol Imaging Biol. 2021 Mar.