Method and composition for the treatment of cancer by the enzymatic conversion of soluble radioactive toxic precipitates in the cancer
US6468503B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 1999 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | May 31, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method for the treatment of cancer is disclosed which is capable of directing supra-lethal doses of radiation, called Hot-Spots, virtually exclusively to the cancer. The present invention involves a multi-step therapy process and includes a class of novel chemical agents. In accordance with the present invention, it was discovered that soluble precipitable materials can be made to accumulate as non-digestible precipitates in targeted cells as a result of enzyme action within the targeted cells. Accumulation is achieved by administering to the living host a soluble binary reagent made by attaching a targeting agent to a novel chemical agent which is a soluble precipitable material. The binary reagent binds to antigenic receptors on targeted cells which endocytose the binary reagent and transport it into the lysosomes where enzymes detach the soluble precipitable material from the targeting agent, causing it to precipitate, accumulate, and be retained in the cells. Increasing amounts of precipitate can be made to accumulate in cells by continuing the administration of the binary reagent. The accumulated precipitate is relocated to the extra-cellular fluid by selectively killing a f…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.