Platelet-derived growth factor-BB restores human immunodeficiency virus Tat-cocaine-mediated impairment of neurogenesis: Role of TRPC1 channels

Honghong Yao, Ming Duan, Lu Yang, Shilpa J Buch

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Platelet-derived growth factor-BB (PDGF-BB) has been reported to provide tropic support for neurons in the CNS. However, whether PDGF-BB regulates neurogenesis, especially in the context of HIV-associated neurological disorder and drug abuse, remains essentially unknown. In this study, we demonstrate that pretreatment of rat hippocampal neuronal progenitor cells (NPCs) with PDGF-BB restored proliferation that had been impaired by HIV Tat-cocaine via the cognate receptors. We identify the essential role of transient receptor potential canonical (TRPC) channels in PDGF-BB-mediated proliferation. Parallel but distinct ERK/CREB, phosphatidylinositol 3-kinase/ Akt signaling pathways with downstream activation of mammalian target of rapamycin (mTOR)/eukaryotic translation initiation factor 4E-binding protein (4E-BP)-p70S6K and nuclear factor-κB were critical for proliferation. Blocking TRPC1 channel suppressed PDGF-mediated proliferation as well as PDGF-BB-induced ERK/CREB and mTOR/4E-BP-p70S6K activation, thereby underscoring its role in this process. In vivo relevance of these findings was further corroborated in Tat transgenic mice wherein hippocampal injection of recombinant AAV2-PDGF-B restored impaired NPC proliferation that was induced by Tat-cocaine. Together, these data underpin the role of TRPC1 channel as a novel target that regulates cell proliferation mediated by PDGF-BB with implications for therapeutic intervention for reversal of impaired neurogenesis inflicted by Tat and cocaine.

Original languageEnglish (US)
Pages (from-to)9835-9847
Number of pages13
JournalJournal of Neuroscience
Volume32
Issue number29
DOIs
StatePublished - Jul 18 2012

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Neurogenesis
Cocaine
HIV
70-kDa Ribosomal Protein S6 Kinases
Stem Cells
Eukaryotic Initiation Factor-4E
Cell Proliferation
Phosphatidylinositol 3-Kinase
Tacrolimus Binding Proteins
Eukaryotic Initiation Factors
Transient Receptor Potential Channels
Sirolimus
Nervous System Diseases
Transgenic Mice
Substance-Related Disorders
platelet-derived growth factor BB
Carrier Proteins
Neurons
Injections

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Platelet-derived growth factor-BB restores human immunodeficiency virus Tat-cocaine-mediated impairment of neurogenesis : Role of TRPC1 channels. / Yao, Honghong; Duan, Ming; Yang, Lu; Buch, Shilpa J.

In: Journal of Neuroscience, Vol. 32, No. 29, 18.07.2012, p. 9835-9847.

Research output: Contribution to journalArticle

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