During the current and prior PO1 funding, Project 1 has made certain important discoveries: (i) on the basis of SAR and QSAR studies, we were able to select the highly effective PS from pyropheophorbide-a (660 nm), purpurinimides (700 nm) and bacteriopurpurinimide (800 nm) series and one of the PS (HPPH) is currently in Phase II human clinical trials, (ii) among the carbohydrate-PS, we discovered that, compared to HPPH (localized in mitochondria), the corresponding galactose conjugate (lysosomal localization) exhibits improved photodynamic activity in certain tumors with minimal skin phototoxicity (iii) in the pyro-series, compared to HPPH, the corresponding Indium analog (In-HPPH), which also localizes in mitochondria showed 8-fold increase in efficacy and (iv) in the pyro- series, an 1-124 labeled PS showed the potential of imaging tumor and tumor metastases, which certainly warrants further investigation. In a separate study, we showed that tumor-avid photosensitizers (e.g. HPPH) can be used as a vehicle to deliver non tumor-specific fluorophores to target sites for fluorescence imaging. In particular, conjugation of a cyanine dye to HPPH resulted in an efficient optical imaging and PDT agent. However, a significant difference between the imaging and PDT dose dose was observed (the therapeutic dose was -10-fold higher than the required imaging dose). Therefore, the conjugation of the highly potent In-HPPH or the metallated analogs of other PS selected on the basis of SAR studies with the cyanine dye could generate optimized compounds for fluorescence tomography and phototherapy. For selecting a compound with optimal imaging and therapeutic potential for Phase I human clinical trials, the aims of the project are as follows:
Aim 1 : To synthesize galactose conjugated long-wavelength absorbing photosensitizers (selected on the basis of SAR studies) and investigate the impact of the galactose moiety in PDT efficacy;
Aim 2 : To synthesize and investigate the effect of certain metallated long wavelength photosensitizers (selected from Aim 1, with or without a carbohydrate moiety) in optimizing their photosensitizing ability;
Aim 3 : To synthesize metallated 1241-photosensitizers (selected from Aim 2) and the corresponding cyanine dye conjugates for developing multifunctional agents for tumor imaging (PET, fluorescence tomography) and PDT.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Program Projects (P01)
Project #
5P01CA055791-19
Application #
8376638
Study Section
Special Emphasis Panel (ZCA1-GRB-P)
Project Start
Project End
Budget Start
2012-02-01
Budget End
2013-01-31
Support Year
19
Fiscal Year
2012
Total Cost
$302,844
Indirect Cost
$118,967
Name
Roswell Park Cancer Institute Corp
Department
Type
DUNS #
824771034
City
Buffalo
State
NY
Country
United States
Zip Code
14263
Egan, Shawn M; Karasik, Ellen; Ellis, Leigh et al. (2017) miR-30e* is overexpressed in prostate cancer and promotes NF-?B-mediated proliferation and tumor growth. Oncotarget 8:67626-67638
Hall, Brandon M; Balan, Vitaly; Gleiberman, Anatoli S et al. (2017) p16(Ink4a) and senescence-associated ?-galactosidase can be induced in macrophages as part of a reversible response to physiological stimuli. Aging (Albany NY) 9:1867-1884
Oakley, Emily; Bellnier, David A; Hutson, Alan et al. (2017) Surface markers for guiding cylindrical diffuser fiber insertion in interstitial photodynamic therapy of head and neck cancer. Lasers Surg Med 49:599-608
Saenz, Courtney; Cheruku, Ravindra R; Ohulchanskyy, Tymish Y et al. (2017) Structural and Epimeric Isomers of HPPH [3-Devinyl 3-{1-(1-hexyloxy) ethyl}pyropheophorbide-a]: Effects on Uptake and Photodynamic Therapy of Cancer. ACS Chem Biol 12:933-946
Mimikos, Christina; Shafirstein, Gal; Arshad, Hassan (2016) Current state and future of photodynamic therapy for the treatment of head and neck squamous cell carcinoma. World J Otorhinolaryngol Head Neck Surg 2:126-129
Patel, Nayan; Pera, Paula; Joshi, Penny et al. (2016) Highly Effective Dual-Function Near-Infrared (NIR) Photosensitizer for Fluorescence Imaging and Photodynamic Therapy (PDT) of Cancer. J Med Chem 59:9774-9787
Jenkins, Samir V; Srivatsan, Avinash; Reynolds, Kimberly Y et al. (2016) Understanding the interactions between porphyrin-containing photosensitizers and polymer-coated nanoparticles in model biological environments. J Colloid Interface Sci 461:225-31
Shafirstein, Gal; Battoo, Athar; Harris, Kassem et al. (2016) Photodynamic Therapy of Non-Small Cell Lung Cancer. Narrative Review and Future Directions. Ann Am Thorac Soc 13:265-75
Rohrbach, Daniel J; Rigual, Nestor; Arshad, Hassan et al. (2016) Intraoperative optical assessment of photodynamic therapy response of superficial oral squamous cell carcinoma. J Biomed Opt 21:18002
Shafirstein, Gal; Rigual, Nestor R; Arshad, Hassan et al. (2016) Photodynamic therapy with 3-(1'-hexyloxyethyl) pyropheophorbide-a for early-stage cancer of the larynx: Phase Ib study. Head Neck 38 Suppl 1:E377-83

Showing the most recent 10 out of 163 publications