Related Experiment Video

Updated: Feb 15, 2026

A Method for Screening and Validation of Resistant Mutations Against Kinase Inhibitors
12:40

A Method for Screening and Validation of Resistant Mutations Against Kinase Inhibitors

Published on: December 7, 2014

15.3K

Methods to validate Hsp90 inhibitor specificity, to identify off-target effects, and to rethink approaches for

Len Neckers1, Brian Blagg2, Timothy Haystead3

  • 1Urologic Oncology Branch, National Cancer Institute, Bethesda, MD, 20892, USA. len@helix.nih.gov.

Cell Stress & Chaperones
|February 3, 2018
PubMed

Insights

The molecular chaperone heat shock protein 90 (Hsp90) is crucial for cellular health. This review discusses validating Hsp90 inhibitors to improve their efficacy in treating diseases like cancer.

Area of Science:

  • Molecular Biology
  • Cellular Biology
  • Pharmacology

Background:

  • The molecular chaperone Hsp90 is integral to the cellular proteostasis network (PN), regulating protein folding, degradation, and stress responses.
  • Diseases such as cancer, neurodegeneration, and infections disrupt the PN.
  • Hsp90 is a key target for small molecule inhibitors, with numerous agents developed since 1994.

Purpose of the Study:

  • To address the need for rigorous validation of Hsp90 inhibitors regarding specificity and mechanism of action.
  • To re-evaluate potential confounding off-target effects of Hsp90 inhibitors.
  • To propose approaches for improving the clinical efficacy of Hsp90 inhibitors in cancer and other diseases.

Main Methods:

  • Review and analysis of existing literature on Hsp90 inhibitors.
  • Discussion of feasible approaches for validating target specificity and mechanism of action.
  • Consideration of strategies to mitigate off-target effects.

Main Results:

  • Many Hsp90 inhibitors lack sufficient validation for specificity and mechanism of action.
  • Off-target effects may contribute to the limited success of Hsp90 inhibitors in clinical trials.
  • Improved validation strategies are essential for successful therapeutic development.

Conclusions:

  • A critical re-evaluation of Hsp90 inhibitor validation is necessary.
  • Ensuring target specificity and understanding mechanisms are crucial for clinical efficacy.
  • Developing refined approaches can enhance the therapeutic potential of Hsp90 inhibitors for various diseases.
Keywords:
CancerClinical trialsHsf1Hsp90InhibitorsMolecular chaperonesOff-target effectsSecondary effects

More Related Videos

Assays for Validating Histone Acetyltransferase Inhibitors09:11

Assays for Validating Histone Acetyltransferase Inhibitors

Published on: August 6, 2020

7.0K
Development of Inhibitors of Protein-protein Interactions through REPLACE: Application to the Design and Development Non-ATP Competitive CDK Inhibitors10:33

Development of Inhibitors of Protein-protein Interactions through REPLACE: Application to the Design and Development Non-ATP Competitive CDK Inhibitors

Published on: October 26, 2015

11.9K

Related Concept Videos

Clinically Relevant Drug Product Specifications: Methods of Establishment01:29

Clinically Relevant Drug Product Specifications: Methods of Establishment

Product specifications define the acceptable quality of a pharmaceutical product by ensuring identity, purity, potency, and strength. These specifications serve as benchmarks during development, manufacturing, and post-approval quality control. Clinically relevant specifications are particularly important because they directly relate to a drug's safety and efficacy in clinical use.Dissolution studies are critical biopharmaceutic tools that link in vitro behavior to in vivo performance. They...
224
Reliability and Validity01:29

Reliability and Validity

Reliability and validity are two important considerations that must be made with any type of data collection. Reliability refers to the ability to consistently produce a given result. In the context of psychological research, this would mean that any instruments or tools used to collect data do so in consistent, reproducible ways.
14.1K
In Vitro Drug Release Testing: Overview, Development and Validation01:10

In Vitro Drug Release Testing: Overview, Development and Validation

In vitro dissolution and drug release tests assess how quickly and how much of a drug is released from its dosage form into an aqueous medium under standardized laboratory conditions. These tests are essential tools in pharmaceutical development and quality assurance, offering insight into the drug's performance before clinical use.During formulation development, dissolution testing identifies incomplete or inconsistent drug release issues. It also supports decisions on selecting the optimal...
374
Eukaryotic Transcription Inhibitors01:52

Eukaryotic Transcription Inhibitors

Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
11.1K
Development of Analytical Methods01:21

Development of Analytical Methods

An analytical methodology can be divided into four sequential steps: technique, method, procedure, and protocol. A technique is a scientific principle that rationalizes a specific phenomenon through chemical measurements. Adapting a technique for analyzing a sample of interest is termed a method. The procedure outlines the directions for performing the analysis via an analytical method. The protocol is the detailed guidelines on the procedure, which should be strictly followed to obtain the...
2.4K
Effects of EDTA on End-Point Detection Methods01:18

Effects of EDTA on End-Point Detection Methods

Different methods, such as visual observance of metal-ion indicators, spectroscopic techniques, and potentiometric methods, can determine the endpoint of an EDTA titration.
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a...
669