Cited by 61Ubiquitin and proteasome pathwaysNicotinic Acetylcholine Receptors StudySmoking Behavior and Cessation

Nicotine coregulates multiple pathways involved in protein modification/degradation in rat brain

Kane, Justin K., Konu, Özlen, Ma, Jennie Z., Li, Ming D.·2004·Molecular Brain Research

Abstract

Previously, we used cDNA microarrays to demonstrate that the phosphatidylinositol and MAP kinase signaling pathways are regulated by nicotine in different rat brain regions. In the present report, we show that, after exposure to nicotine for 14 days, ubiquitin, ubiquitin-conjugating enzymes, 20S and 19S proteasomal subunits, and chaperonin-containing TCP-1 protein (CCT) complex members are upregulated in rat prefrontal cortex (PFC) while being downregulated in the medial basal hypothalamus (MBH). In particular, relative to saline controls, ubiquitins B and C were upregulated by 33% and 47% (P<0.01), respectively, in the PFC. The proteasome beta subunit 1 (PSMB1) and 26S ATPase 3 (PSMC3) genes were upregulated in the PFC by 95% and 119% (P<0.001), respectively. In addition to the protein degradation pathway of the ubiquitin-proteasome complexes, we observed in the PFC an increase in the expression of small, ubiquitin-related modifiers (SUMO) 1 and 2 by 80% and 33%, respectively (P<0.001), and in 3 of 6 CCT subunits by up to 150% (P<0.0001). To a lesser extent, a change in the opposite direction was obtained in the expression of the same gene families in the MBH. Quantitative real-time RT-PCR was used to validate the microarray results obtained with some representative genes involved in these pathways. Taken together, our results suggest that, in response to systemic nicotine administration, the ubiquitin-proteasome, SUMO, and chaperonin complexes provide an intricate control mechanism to maintain cellular homeostasis, possibly by regulating the composition and signaling of target neurons in a region-specific manner.

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Crossref · 10.1016/j.molbrainres.2004.09.010

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Authors
Kane, J. K., Konu, Ö., Ma, J. Z., & Li, M. D.
Affiliations
  • The University of Texas at San Antonio Health Science Center (US)
  • Bilkent University (TR)
Corresponding author
Li, Ming D.
Venue
Molecular Brain Research
Publisher
Elsevier BV
Published
2004-12
Volume
132
Issue
2
Pages
181-191
ISSN
0169-328X (ISSN-L)
OpenAlex
W1980060298
Cited by
61
References
62
Citations by year
2025: 1 · 2023: 1 · 2022: 2 · 2021: 1 · 2020: 2 · 2019: 4 · 2018: 1 · 2017: 2 · 2016: 3 · 2015: 2 · 2014: 3 · 2013: 3 · 2012: 3
FWCI
1.42
Type
journal article
Language
en
Open access
closed
Locations
  • Molecular Brain Research (publishedVersion)
  • PubMed (publishedVersion)
  • Bilkent University Institutional Repository (Bilkent University) (submittedVersion)
Funders
National Institute on Drug Abuse (DA12844, R01DA012844, R01DA013783, R01 DA 13783)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
  • Health Sciences › Medicine › Physiology › Smoking Behavior and Cessation
Keywords
nicotine, ubiquitin-proteasome system, protein degradation, small ubiquitin-related modifier, SUMOylation, proteasome, prefrontal cortex, medial basal hypothalamus, regional gene expression, brain homeostasis
MeSH terms
Animals, Brain Chemistry, Male, Nicotine, Up-Regulation, Gene Expression, Rats, Sprague-Dawley, Nicotinic Agonists, Chaperonins, Reverse Transcriptase Polymerase Chain Reaction, Oligonucleotide Array Sequence Analysis, Ubiquitin, SUMO-1 Protein, Proteasome Endopeptidase Complex, Rats

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