Related Experiment Video
Updated: Jun 6, 2026
Assessment of Resistance to Tyrosine Kinase Inhibitors by an Interrogation of Signal Transduction Pathways by Antibody Arrays
Published on: September 19, 2018
Sensing the insulin signaling pathway with an antibody array
Hua-Jun He1, Yaping Zong, Michel Bernier
1Biochemical Science Division, National Institute of Standards and Technology, Gaithersburg, MD, USA.
Abstract:
The development of insulin resistance and type 2 diabetes is determined by various factors, including defects within the insulin signaling pathway. Mediators of insulin resistance operate through activation of various protein kinase C isoforms, IκB kinase β (IKKβ), and/or c-Jun N-terminal kinase, and subsequent inhibition of the proximal insulin signaling pathway via the insulin receptor substrate 1 and Akt. These mechanisms are still largely unresolved because of the complexity of the molecular events. In this study, an expression and activation state profiling of multiple known key signaling biomolecules involved in insulin metabolic and mitogenic signaling pathways was evaluated using a phosphospecific antibody array platform. The results of the arrayed antibodies were verified by the multiplexed bead array assay and conventional Western blot analysis, and confirmed the well-known inhibitory effects of phorbol esters on insulin signaling pathway activation. Of interest, the increase in protein kinase C signaling responses with phorbol esters was associated with activation of the lipid phosphatase PTEN and a 27 kDa HSP. Thus, this insulin signaling antibody array provides a powerful and effective way to investigate the mechanism of insulin resistance and likely assist the development of innovative therapeutic drugs for type 2 diabetes.
Insights
This study used an antibody array to investigate insulin resistance mechanisms. The findings confirm phorbol ester effects and reveal new associations, aiding type 2 diabetes drug development.
Area of Science:
- Biochemistry
- Molecular Biology
- Endocrinology
Background:
- Insulin resistance and type 2 diabetes involve complex defects in the insulin signaling pathway.
- Key mediators include protein kinase C isoforms, IκB kinase β (IKKβ), and c-Jun N-terminal kinase, inhibiting insulin signaling via insulin receptor substrate 1 and Akt.
- The precise molecular mechanisms underlying these disruptions remain largely unresolved.
Purpose of the Study:
- To profile the expression and activation states of key biomolecules in insulin metabolic and mitogenic signaling pathways.
- To investigate the molecular mechanisms of insulin resistance.
- To evaluate the utility of a phosphospecific antibody array platform for studying insulin signaling.
Main Methods:
- Utilized a phosphospecific antibody array platform for expression and activation state profiling.
- Verified array results using multiplexed bead array assays and conventional Western blot analysis.
- Employed phorbol esters to modulate insulin signaling pathways.
Main Results:
- Confirmed the inhibitory effects of phorbol esters on insulin signaling pathway activation.
- Observed an increase in protein kinase C signaling responses with phorbol esters.
- Associated phorbol ester treatment with activation of the lipid phosphatase PTEN and a 27 kDa heat shock protein (HSP).
Conclusions:
- The developed insulin signaling antibody array is a powerful tool for investigating insulin resistance mechanisms.
- This platform can aid in the development of novel therapeutic strategies for type 2 diabetes.
- The study identified potential new molecular players in insulin resistance.
