What question did this study set out to answer?

Identify the molecular mechanism coupling the insulin receptor to cellular oxidant generation and evaluate the role of Nox4 in insulin signal transduction.

February 14, 2004Molecular and Cellular BiologyOpen Access

The NAD(P)H Oxidase Homolog Nox4 Modulates Insulin-Stimulated Generation of H₂O₂ and Plays an Integral Role in Insulin Signal Transduction

View Full Paper

Ask AI

Bookmark

Identify the molecular mechanism coupling the insulin receptor to cellular oxidant generation and evaluate the role of Nox4 in insulin signal transduction.
Assessed Nox4 expression in insulin-sensitive adipose tissue using reverse transcription-PCR and Northern blot analyses.
Inhibited Nox4 function in differentiated 3T3-L1 adipocytes using adenovirus-mediated dominant-negative deletion mutants and siRNA knockdown.
Measured the effects of Nox4 modulation on insulin-stimulated H2O2 production, receptor tyrosine phosphorylation, downstream kinase activation, glucose uptake, and PTP1B catalytic activity.
Expression of dominant-negative Nox4 constructs or siRNA knockdown of Nox4 markedly attenuated insulin-stimulated H2O2 generation, insulin receptor and IRS-1 tyrosine phosphorylation, downstream serine kinase activation, and glucose uptake.
Overexpression of Nox4 inhibited PTP1B catalytic activity and reversed PTP1B-induced suppression of insulin-stimulated insulin receptor tyrosine phosphorylation.

Discussion

No takes yet. Share an insight, caveat, or question.

Implication

Experimental study reveals that Nox4 mediates insulin-induced hydrogen peroxide generation in adipocytes, highlighting an essential mechanism for insulin receptor activation and glucose uptake.

Cite This Study

Mahadev et al. (2004) studied this question.

synapsesocial.com/papers/69e96b57c744ee735f607b73 https://doi.org/10.1128/mcb.24.5.1844-1854.2004

View Full Paper

Ask AI

Bookmark

Implication

Experimental study reveals that Nox4 mediates insulin-induced hydrogen peroxide generation in adipocytes, highlighting an essential mechanism for insulin receptor activation and glucose uptake.

The NAD(P)H Oxidase Homolog Nox4 Modulates Insulin-Stimulated Generation of H₂O₂ and Plays an Integral Role in Insulin Signal Transduction

Key Points

Discussion

Implication

Cite This Study

The NAD(P)H Oxidase Homolog Nox4 Modulates Insulin-Stimulated Generation of H₂O₂ and Plays an Integral Role in Insulin Signal Transduction

Key Points

Discussion

Implication

Cite This Study

Also Consider

Also Consider