Viral Oncolytic Therapeutics for Neoplastic Meningitis
Final rept. 1 Jul 2011-30 Jun 2014
MASSACHUSETTS GENERAL HOSPITAL BOSTON
Pagination or Media Count:
Neoplastic meningitis is a fatal complication of breast cancer for which there is no cure. The project aimed to develop a novel, safe and efficient therapy for neoplastic meningitis, that of HSV-1 oncolysis. During the 1st year of the grant we prepared virus titers 1x107, 1x108 and 1x109 pfuml for studying fractionated virus particles and developed stable breast cancer cell lines together with those that express bioluminescence Rluc and fluorescence mCherry markers for in vivo molecular imaging and tested their sensitivity to the HSV-1 oncolysis. These results were published in Cancer Research PMC4147034 2014. We selected MDA-MB-23-Rluc-mCherry to develop a mouse model of meningeal metastases during the 2nd year of the grant while waiting for the MGH animal facilities to be set up for housing. We characterized tumor growth in this model with sequential bioluminescence and MRI. Tumor growth occurred in 3 phases a lag, exponential and plateau phase and was comparable with disease progression in humans. The model was presented at the annual meeting of the Society of nuclear medicine and molecular imaging SNMMI in Vancouver June, 2013. The manuscript is ready for submission to Cancer Research. In the 3rd year we used this model to investigate the potential therapeutic effect of HSV-1 on meningeal metastases. When HSV-1 was injected at the early growth phase day 12 we observed a significant reduction in tumor growth compared to the non-treated mice. Data gathered from this investigation was used to study virus distribution in the brain in the rat model. The therapeutic effect of HSV-1 oncolysis on meningeal metastases was presented oral at the annual meeting of the World Molecular Imaging Society Korea, June 20114. The funding received by this award has been invaluable in terms of developing a model of neoplastic meningitis in mice and investigating the potential therapeutic effect of HSV-1 oncolysis on neoplastic meningitis.
- Anatomy and Physiology
- Medicine and Medical Research