Hippocampal proBDNF facilitates place learning strategy associated with neural activity in rats

Brain Structure & Function
Lei AnWei Sun

Abstract

Mature brain-derived neurotrophic factor has been shown to have a promotive effect on synaptic plasticity and spatial memory. The precursor of BDNF (proBDNF) has emerged as a protein against its mature form. However, it is unknown whether and how proBDNF regulates neural excitability and spatial behavior. Through infusion of cleavage-resistant proBDNF or its antibody into HPC, we sought evidence for the influences by employing multiple behavioral tests and recording hippocampal single-unit activity. Our behavioral findings showed that proBDNF induced beneficial effects on spatial learning by facilitating the use of the place strategy and inhibiting the response strategy, including (1) using more place search strategies but less response strategies, and (2) increasing the number of rats in choosing place strategies but not response strategies. Intriguingly, infusion of an anti-proBDNF antibody did not affect rats' training process but rendered the adaption to learning reversal training more difficult, indicating deficits in choosing the proper learning strategy. The training-induced increase in proBDNF promoted the firing rate of pyramidal neurons but not fast-spiking (FS) interneurons. Importantly, endogenous proBDNF facilitate...Continue Reading

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Citations

Aug 3, 2021·Frontiers in Cell and Developmental Biology·Wei SunLei An

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Methods Mentioned

BETA
chips
dissection
protein assay

Software Mentioned

SpikeSort
MathWorks
Ethovision
Neuroexplorer
SPSS
Neuralynx
Cheetah
Matlab
Klusters
KlustaKwik

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