Research Highlight


A) NIRF images showing the accumulation of the MN-EPPT probe in colon tumors. The tumor on the left lacks the uMUC-1 antigen (uMUC-1 -), while the tumor on the right does have the uMUC-1 antigen (uMUC-1 +). Signal from the probe is much higher in the uMUC-1 + tumor, as demonstrated by the center and right images showing raw fluorescence and a color coded map, respectively. B) NIRF images of excised tumor C) Fluorescence microscopy of the probe in excised tissue. Images demonstrate that the nanoprobe retained its structural integrity.

Tracking pancreatic adenocarcinoma response to treatment using targeted, multi-modal nanoparticles

Early diagnosis and efficient treatment of tumors are essential to the survival of cancer patients. New molecular based therapies are beginning to allow treatment regimens that take advantage of a tumor's unique molecular characteristics. However, there is a need for more sophisticated imaging techniques to enable the effective application of these therapies. Imaging probes that are able to target tumors would help to facilitate earlier diagnoses, monitor tumor response to existing therapies, and facilitate the development of novel therapeutics. One class of probe currently being studied and refined are cross-linked, iron oxide nanoparticles carrying EPPT peptides. This molecule is a targeted, multi-modal imaging probe referred to as MN-EPPT. The EPPT peptide attached to the nanoparticle’s dextran coat is able to bind to the underglycosylated mucin-1 antigen, (uMUC-1) which is specifically expressed on the surface of human adenocarcinomas. As a result, the probe is able to accumulate selectively in tumor cells. uMUC-1 is present on almost 50% of all human cancers, including breast, prostate, lung, and pancreatic cancers, among others. The nanoparticles are designed for use with two different, yet complementary imaging modalities. The iron oxide is superparamagnetic, which means it is viable as a contrast agent for MR imaging. Furthermore, MN-EPPT particles are coated with a Cy5.5 dye, which allows them to be used for optical near-infrared imaging (NIRF). This dual functionality lets the probe take advantage of the unique benefits of each type of imaging. MRI provides high spatial and temporal resolution, and NIRF is known for its sensitivity. In addition, the presence of Cy5.5 dye allows for correlative fluorescence microscopy of excised tissues. The current project will evaluate MN-EPPT’s utility as a device for assessing tumor response to a standard chemotherapeutic, Gemcitabine, in a preclinical model of orthotopic pancreatic adenocarcinoma. This study will also validate the work done in previous projects that demonstrated MN-EPPT’s ability to accumulate selectively at the site of the tumor. Both MR and NIRF imaging will be used to examine the probe's feasibility as a tool for tracking changes in tumor size. In addition, we will investigate whether Gemcitabine causes downregulation of uMUC1 antigen during treatment, which may affect MN-EPPT’s ability to accumulate in tumor cells. This will be done by investigating uMUC1 mRNA expression and correlating it with MN-EPPT accumulation in tumors.

 

 


Trainee Research

CaNCURE provides trainees with a 6-month hands-on research experience and one-on-one mentoring by leading researchers in cancer nanomedicine.   Projects performed by current and past participants include:

Radiotherapeutic synergism of thermogelling cisplatin-loaded polymers for cervical cancer treatment

Online monitoring and image-guided treatment of chemoresistant micrometastases

Small T Antigen Effect on Mitotic Proteins B-Myb and FOXM1

Combined Cisplatin and Olaparib nanoparticles for ovarian cancer therapy

Assessment of neoadjuvant therapy-induced atherosclerotic changes using ferumoxytol-enhanced MR imaging

Development of PSMA-targeting nanoparticles for positron emitting tomography imaging in prostate cancer using animal models

Pharmacokinetic analysis of changes in temozolomide distribution after antiangiogenic treatment of glioblastoma

Nanoencapsulation of tyrosine kinase inhibitors and their effects on pathway inhibition

miRNA analysis in mouse model of metastatic breast cancer. (Proj 2) The inhibition of PD-L1 on a Pan02 cell line w/ siRNA-nanodrug & gemcitabine treatment

Optimization of macrophage-targeted nanoparticles for positron emission tomography imaging in cancer

Identification of novel therapeutic targets of the Notch1 signaling pathway

Targeting WASp using Wiskostatin-gold nanoparticles

Quantification of SPION accumulation in tumors using positive-contrast MRI

Implementation of novel MR-based attenuation correction in PET/MR pelvic scans

Injectable thermogelling cisplatin-loaded hydrogels for combined chemo-radiation therapy in cervical cancer

Assessing the reproducibility of MRI-based brain tumor measurements between both observers and MRI vendors

Radiation enhancement in cancer cells using gold and gadolinium nanoparticles

Protein-encapsulated nanoparticles for oral delivery of anti-mitotic agents in prostate cancer

Tracking pancreatic adenocarcinoma response to treatment using targeted, multi-modal nanoparticles

Erythropoietin improves antitumor immune response through reversal of the hypoxic tumor microenvironment

Capture of circulating tumor DNA through the use of biotinylated poly-lysine affixed to gold nanoparticles

The Assessment and Comparison of Ferumoxtran as Contrast Imaging Agent in Patients with Pancreatic Cancers.

Localized chemo- and chemo-radiation for the treatment of prostate cancer

Longitudinal assessment of tumor heterogeneity during immunotherapy for metastatic melanoma

Co-delivery of protective substrate and chemotherapy drugs via lipid Bilayer Mesoporous Silica Nanoparticles


Soleil Doggett (Biology, '16) talks to her fellow peers about her research on oxygenating tumors to stimulate the anti-tumor immune response.

 


Trainee e-portfolios

Photo credit: Tom Kates Photography

While on co-op, trainees document their research in an e-portfolio.  This gives trainees the opportunity to provide regular updates on their research progress, reflect on training they are receiving, and explain how their research fits within the field of cancer nanomedicine.  These research e-portfolios can be accessed through individual trainee profiles.  The complete collection may be found here.

Check out this month’s featured e-portfolios by Rachel Fontana and Jordan Harris!

 


Presentation at CaNCURE Nanomedicine Day

At the completion of their co-op, trainees are provided with the opportunity to present their research to a wider audience.  In our 1st annual CaNCURE Nanomedicine Day, trainees prepared interactive, digital posters to display on electronic poster boards.  Over 100 faculty, students, and researchers attended our first event!

Check out the news article and congrats to all the poster winners!

Jordan Harris: Most Innovative Cancer Research Award
Jeremy Thong: Best Undergraduate Research Poster Award
Craig Pille: Most Promising Translational Research Award
Bryan Kynnap: Most Promising Basic Science Award
Jordan Harris: Top Chemical Engineering Poster Award