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Vascularization Inhibitors

a vascularization inhibitor and anti-solid cancer technology, applied in the direction of instruments, drug compositions, peptide/protein ingredients, etc., can solve the problems of unidentified substances responsible for vascularization during organogenesis, and achieve the effect of inhibiting the proliferation, invasion and metastasis of cancer

Inactive Publication Date: 2013-09-12
KISHIMOTO TADAMITSU +2
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Benefits of technology

[0011]It is further contemplated that promotion of the action due to CXCR4 accelerates vascularization and thus can be a remedy for a disease where the vascularization is desired.

Problems solved by technology

However, substances responsible for vascularization during organogenesis have not yet been identified, because most of these mice die during early gestation before development of their tissues.

Method used

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Creation and Analysis of Mice Completely Lacking CXCR4

[0112]Genome DNA containing the CXCR4 locus was isolated from a murine cell line 129DNA library (STRATAGENE).

[0113]A 1.1-kb genomic fragment containing the 5′-coding region of exon 2 was replaced by the neomycin resistant gene, and the herpes simplex thymidine kinase gene was linked to the 5′-terminus.

[0114]The targeting vector was introduced into the cells on day 14.1 of embryogenesis (referred to as “E14.1” hereafter) by electroporation, and a homologous recombination was selected by the use of G418 and ganciclovir and identified by PCR.

[0115]The structure of the mutant locus and the presence of a single insert in the ES cell colony were confirmed by Southern hybridization. According to the method as described in Nagasawa, T. et al., Nature 382, 685-688 (1996), the mutant ES cell colony was used to create a mutant mouse by the injection of undifferentiated embryonic cells.

[0116]For Southern hybridization, tail DNA was digested ...

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Abstract

This invention provides a therapeutic agent for inhibiting neovascularization, a therapeutic agent for a solid cancer, a therapeutic agent for a disease pathologically caused by neovascularization, and a therapeutic agent for repairing a tissue comprising as the effective ingredient, a substance that potentiates the action of CXCR4.Based on the finding that vascularization is suppressed in CXCR4 knockout mice, it becomes possible to prepare a therapeutic agent for suppressing vascularization, a therapeutic agent for a solid cancer, a therapeutic agent for a disease pathologically caused by neovascularization, each of which comprises as the effective ingredient, a substance that inhibits the action of CXCR4, as well as to prepare a therapeutic agent for repairing a tissue comprising as the effective ingredient, a substance that potentiates the action of CXCR4. Methods for treatment are made possible that use these therapeutic agents.

Description

TECHNICAL FIELD[0001]This invention relates to a novel vascularization inhibitor, an anti-solid cancer agent, and a therapeutic agent for a disease pathologically caused by neovascularization, each comprising a CXCR4 inhibitor as the effective ingredient. Further, the invention relates to a tissue-repairing agent comprising a CXCR4 potentiator as the effective ingredient.BACKGROUND ART[0002]In the past, it has been known that when tumor cells invade out of the blood vessels, vascular endothelial cells rupture. It is also known that neovascularization is deeply involved in the proliferation and migration of cancer and that tumor cells produce and release a variety of neovascularization factors. Especially, neovascularization is considered crucial to the proliferation of solid tumors.[0003]Therefore, a substance that inhibits the neovascularization has the potential to be an anticancer agent that is provided with a novel mode of action. For this reason, several types of neovasculariza...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G01N33/50A61K38/17
CPCG01N33/5011A61K38/1793A61P35/00A61P43/00
Inventor KISHIMOTO, TADAMITSUNAGASAWA, TAKASHITACHIBANA, KAZUNOBU
Owner KISHIMOTO TADAMITSU
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