Related Experiment Video
Updated: Nov 8, 2025

Defining Gene Functions in Tumorigenesis by Ex vivo Ablation of Floxed Alleles in Malignant Peripheral Nerve Sheath Tumor Cells
Published on: August 25, 2021
Toxic proteins application in cancer therapy
Zahra Setayesh-Mehr1, Mahdiye Poorsargol2
1Department of Biology, Faculty of Sciences, University of Zabol, Zabol, Iran. setayeshmehr@uoz.ac.ir.
Abstract:
Ribosome inactivating proteins (RIPs) as family of anti-cancer drugs recently received much attention due to their interesting anti-cancer mechanism. In spite of small drugs, RIPs use the large-size effect (LSE) to prevent the efflux process governed by drug resistance transporters (DRTs) which prevents inside of the cells against drug transfection. There are many clinical translation obstacles that severely restrict their applications especially their delivery approach to the tumor cells. As the main goal of this review, we will focus on trichosanthin (TCS) and gelonin (Gel) and other types, especially scorpion venom-derived RIPs to clarify that they are struggling with what types of bio-barriers and these challenges could be solved in cancer therapy science. Then, we will try to highlight recent state-of-the-arts in delivery of RIPs for cancer therapy.
Insights
Ribosome inactivating proteins (RIPs) are promising anti-cancer drugs that overcome drug resistance. This review explores challenges and advances in delivering RIPs, like trichosanthin and gelonin, to tumor cells for effective cancer therapy.
Area of Science:
- Biochemistry
- Pharmacology
- Oncology
Background:
- Ribosome inactivating proteins (RIPs) show potential as anti-cancer agents.
- RIPs utilize a large-size effect (LSE) to bypass drug resistance transporters (DRTs).
- Clinical application of RIPs is hindered by delivery challenges to tumor cells.
Purpose of the Study:
- To review RIPs, focusing on trichosanthin (TCS) and gelonin (Gel).
- To identify bio-barriers encountered by RIPs in cancer therapy.
- To highlight advancements in RIP delivery strategies for cancer treatment.
Main Methods:
- Literature review of RIPs, including natural and scorpion venom-derived types.
- Analysis of drug resistance mechanisms and bio-barriers affecting RIPs.
- Exploration of current state-of-the-art delivery systems for RIPs.
Main Results:
- RIPs offer a unique mechanism against drug-resistant cancers.
- Key bio-barriers include cellular uptake and tumor penetration.
- Novel delivery systems are emerging to enhance RIP efficacy.
Conclusions:
- Overcoming delivery obstacles is crucial for RIPs in clinical cancer therapy.
- Further research into targeted delivery systems will improve RIP-based treatments.
- RIPs represent a valuable class of therapeutics for overcoming drug resistance.
Related Concept Videos
Tumor Immunotherapy
Targeted Cancer Therapies
There are several types of targeted therapies against...
Combination Therapies and Personalized Medicine
The combination of the drug acetazolamide and sulforaphane is a good example of combination therapy to treat cancer. The cells in the interior of a large tumor often die due to the hypoxic and...
Cancer Therapies
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
Toxic Reactions: Overview
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...
Cancer Vaccines
Cancer vaccines come in two categories: preventive (prophylactic) and treatment (active). Preventive vaccines, such as the Human Papillomavirus (HPV) vaccine, protect against viruses that cause certain...

