Related Experiment Video
Updated: May 30, 2026
14:28
Peptide-based Identification of Functional Motifs and their Binding Partners
Published on: June 30, 2013
HIV-Nef and AIDS pathogenesis: are we barking up the wrong tree?
1Department of Dermatology, University of Erlangen/Nürnberg, D-91052 Erlangen, Germany. Andreas.Baur@uk-erlangen.de
Trends in Microbiology
|July 29, 2011
Summary
Human immunodeficiency virus (HIV) Nef protein
Area of Science:
- Virology
- Immunology
- Molecular Biology
Background:
- The human immunodeficiency virus (HIV) Nef protein has been studied for two decades.
- Nef's role in HIV pathogenesis is clear, with initial functions including downregulation of CD4 and MHC-I receptors.
- Increasing evidence suggests Nef also induces exocytosis of cytokines and Nef-containing microvesicles.
Purpose of the Study:
- To re-evaluate the primary pathogenic function of the HIV Nef protein.
- To explore the significance of Nef-induced secretion in HIV pathogenesis.
Main Methods:
- Review of existing research on Nef protein functions.
- Analysis of the connection between endocytosis and exocytosis induced by Nef.
- Opinion-based argument on the pathogenesis-relevant function of Nef.
Main Results:
- Nef's known functions have expanded beyond receptor downregulation.
- Nef actively participates in both endocytosis and exocytosis.
- Nef-induced exocytosis, including secretion of cytokines and microvesicles, is increasingly recognized.
Conclusions:
- The prevailing focus on Nef-induced endocytosis may have overlooked a critical pathogenic mechanism.
- Nef-induced secretion is proposed as the most likely pathogenesis-relevant function of this viral effector.
- This perspective challenges current understandings and suggests a shift in research focus for HIV pathogenesis.
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