CD133, Selectively Targeting the Root of Cancer

Cancer stem cells (CSC) are capable of promoting tumor initiation and self-renewal, two important hallmarks of carcinoma formation. This population comprises a small percentage of the tumor mass and is highly resistant to chemotherapy, causing the most difficult problem in the field of cancer resear...

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Main Authors: Jörg U. Schmohl, Daniel A. Vallera
Format: Article
Language:English
Published: MDPI AG 2016-05-01
Series:Toxins
Subjects:
Online Access:http://www.mdpi.com/2072-6651/8/6/165
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author Jörg U. Schmohl
Daniel A. Vallera
author_facet Jörg U. Schmohl
Daniel A. Vallera
author_sort Jörg U. Schmohl
collection DOAJ
description Cancer stem cells (CSC) are capable of promoting tumor initiation and self-renewal, two important hallmarks of carcinoma formation. This population comprises a small percentage of the tumor mass and is highly resistant to chemotherapy, causing the most difficult problem in the field of cancer research, drug refractory relapse. Many CSC markers have been reported. One of the most promising and perhaps least ubiquitous is CD133, a membrane-bound pentaspan glycoprotein that is frequently expressed on CSC. There is evidence that directly targeting CD133 with biological drugs might be the most effective way to eliminate CSC. We have investigated two entirely unrelated, but highly effective approaches for selectively targeting CD133. The first involves using a special anti-CD133 single chain variable fragment (scFv) to deliver a catalytic toxin. The second utilizes this same scFv to deliver components of the immune system. In this review, we discuss the development and current status of these CD133 associated biological agents. Together, they show exceptional promise by specific and efficient CSC elimination.
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spelling doaj.art-08ced24a9be044bcaac3ac28276b8c862022-12-22T02:17:56ZengMDPI AGToxins2072-66512016-05-018616510.3390/toxins8060165toxins8060165CD133, Selectively Targeting the Root of CancerJörg U. Schmohl0Daniel A. Vallera1University of Minnesota Masonic Cancer Center, Section of Molecular Cancer Therapeutics, Therapeutic Radiology-Radiation Oncology, University of Minnesota, Minneapolis, MN 55423, USAUniversity of Minnesota Masonic Cancer Center, Section of Molecular Cancer Therapeutics, Therapeutic Radiology-Radiation Oncology, University of Minnesota, Minneapolis, MN 55423, USACancer stem cells (CSC) are capable of promoting tumor initiation and self-renewal, two important hallmarks of carcinoma formation. This population comprises a small percentage of the tumor mass and is highly resistant to chemotherapy, causing the most difficult problem in the field of cancer research, drug refractory relapse. Many CSC markers have been reported. One of the most promising and perhaps least ubiquitous is CD133, a membrane-bound pentaspan glycoprotein that is frequently expressed on CSC. There is evidence that directly targeting CD133 with biological drugs might be the most effective way to eliminate CSC. We have investigated two entirely unrelated, but highly effective approaches for selectively targeting CD133. The first involves using a special anti-CD133 single chain variable fragment (scFv) to deliver a catalytic toxin. The second utilizes this same scFv to deliver components of the immune system. In this review, we discuss the development and current status of these CD133 associated biological agents. Together, they show exceptional promise by specific and efficient CSC elimination.http://www.mdpi.com/2072-6651/8/6/165cancer stem cellCD133relapseBIKEtargeted therapies
spellingShingle Jörg U. Schmohl
Daniel A. Vallera
CD133, Selectively Targeting the Root of Cancer
Toxins
cancer stem cell
CD133
relapse
BIKE
targeted therapies
title CD133, Selectively Targeting the Root of Cancer
title_full CD133, Selectively Targeting the Root of Cancer
title_fullStr CD133, Selectively Targeting the Root of Cancer
title_full_unstemmed CD133, Selectively Targeting the Root of Cancer
title_short CD133, Selectively Targeting the Root of Cancer
title_sort cd133 selectively targeting the root of cancer
topic cancer stem cell
CD133
relapse
BIKE
targeted therapies
url http://www.mdpi.com/2072-6651/8/6/165
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