Transluminal delivery of oncoltyic viruses for cancer therapy

1. A method for treating cancer tissue in an organ, said method comprising delivering an oncolytic virus selected for susceptibility of infecting the cancer tissue to be treated, locally to the cancer tissue in the organ by application of the virus proximally through an infusion lumen of a balloon catheter inserted into a blood vessel or duct in direct fluid communication with a target site of the cancer tissue, and discharging the virus under relatively low pressure distally from the infusion lumen directly into the blood vessel or duct proximally of the site and distally of a single balloon of the catheter; while selectively increasing pressure in the blood vessel or duct by the concentration or volume of virus delivered, to force the virus under an effective extravasation pressure through a natural endothelial barrier of the blood vessel or duct lining and into the cancer tissue at the target site, thereby increasing local delivery of an effective dose of the virus to the target site of the cancer tissue.

2. The method of claim 1 , further comprising occluding said blood vessel or duct proximal to a location of discharge of the oncolytic virus by inflating the single balloon during at least a portion of the duration of said delivering of said oncolytic virus to increase the concentration or volume of virus delivered to said site distally of the inflated balloon.

3. The method of claim 1 , wherein the application of oncolytic virus through the catheter lumen directly into a blood vessel is performed through an arterial vessel.

4. The method of claim 2 , comprising performing said occlusion of the blood vessel or duct by inflating the single balloon through an inflation lumen of said catheter distinct from the infusion lumen for a prescribed time interval sufficient to enable increase of the concentration or volume of oncolytic virus delivered to said site by said effective extravasation pressure, but insufficient to damage healthy tissue.

5. The method of claim 4 , including introducing a guide wire through said blood vessel or duct to said site and thereafter advancing said catheter over the guide wire until the distal end of the catheter reaches a selected point in the vicinity and proximally of said site for delivering the oncolytic virus thereto.

6. The method of claim 1 , wherein said cancer belongs to the group of pancreatic cancer, prostate carcinoma, lung cancer, renal cancer, liver cancer, lymphoma, breast cancer or a brain tumor.

7. The method of claim 1 , wherein said oncolytic virus is a H1 parvovirus (H1-PV) or a related rodent parvovirus.

8. The method of claim 7 , wherein said related rodent parvovirus is LuIII, Mouse minute virus (MMV), Mouse parvovirus (MPV), Rat minute virus (RMV), Rat parvovirus (RPV) or Rat virus (RV).

9. The method of claim 1 , wherein the oncolytic virus is formulated together with a contrast agent and the delivery is monitored with adjustment of the delivery pressure to maximize deposition through the natural endothelial barrier presented by the blood vessel or duct lining at the site of the cancer tissue.

10. A method for delivering parvoviruses to a tumor in a patient's body, said method comprising delivering parvoviruses to the site of the tumor to be treated by an intraluminal application of the parvoviruses through a central lumen of a single-balloon catheter inserted into a blood vessel or duct of said site using an effective extravasation pressure that results in selective delivery of an effective dose of the parvoviruses from a distal exit of the catheter central lumen directly through a natural endothelial lining of the blood vessel or duct and into a parenchyma at the site of the tumor located distally of said distal exit, after having inflated the single balloon of the catheter located proximally of said distal exit.

11. The method of claim 10 , further comprising occluding said blood vessel or duct by the balloon inflation proximal to the location of parvovirus entry into parenchyma at the tumor site via said intraluminal application during at least a portion of the duration of said delivery of parvoviruses to increase the concentration or volume of parvoviruses, whereby to produce said effective extravasation pressure to enable said effective dose to be delivered to said site.

12. The method of claim 10 , further including administering one or more interferons locally together with the parvoviruses to increase the concentration or volume of parvoviruses, and thereby of said effective extravasation pressure to enable an effective dose of parvoviruses to be delivered to said site.

13. The method of claim 11 , further including administering one or more interferons locally together with the parvoviruses to assist in increasing concentration or volume of parvoviruses in production of said effective extravasation pressure to enable an effective dose to be delivered to said site.