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- W2891032870 abstract "Sympathetic neurons of SCG are dependent on availability of nerve growth factor (NGF) for their survival. SCG neurons express nicotinic receptors (nAChR) whose expression levels are modulated by nicotine. Nicotine exerts multiple effects on neurons, including neuroprotection, through nAChR binding. Although sympathetic neurons express robust levels of nAChR, a possible neuroprotective role for nicotine in these neurons is not well-understood. Therefore we determined the effect of nicotine exposure on survival of SCG neurons during NGF withdrawal in a well-established cell culture system. NGF was withdrawn in rat neonatal SCG neuron cultures which were then treated with either 10 μM nicotine alone or with nAChR antagonists 0.1 μM α-bungarotoxin (antagonist for α7 subunit bearing nAChR) and 10 μM mecamylamine (non-specific antagonist for ganglionic nAChR) for 48 h. Apoptotic death was determined by TUNEL staining. Cell survival was also determined by MTS assay. Western blot analysis of ERK1/2 was also performed. Our results showed that exposure to 10 μM nicotine significantly reduced apoptotic cell death in SCG neurons resulting from NGF withdrawal as shown by fewer TUNEL positive cells. The MTS assay results also revealed that 10 μM nicotine concentration significantly increased cell survival thus indicating neuroprotective effect of nicotine against cell death resulting from NGF withdrawal. Nicotinic receptor antagonists (bungarotoxin & mecamylamine) attenuated the effect of nicotine's action of neuroprotection. Western blot analysis showed an increased expression of ERK1/2 in nicotine treated cultures suggesting nicotine provided neuroprotection in SCG neurons by increasing the expression of ERK1/2 through nicotinic receptor dependent mechanisms." @default.
- W2891032870 created "2018-09-27" @default.
- W2891032870 creator A5003772484 @default.
- W2891032870 creator A5006771119 @default.
- W2891032870 date "2019-01-01" @default.
- W2891032870 modified "2023-09-26" @default.
- W2891032870 title "Nicotine is neuroprotective to neonatal neurons of sympathetic ganglion in rat" @default.
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- W2891032870 doi "https://doi.org/10.1016/j.autneu.2018.08.004" @default.
- W2891032870 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6312731" @default.
- W2891032870 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30206032" @default.
- W2891032870 hasPublicationYear "2019" @default.
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