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Alfonso Abizaid, Zhong-Wu Liu, Zane B. Andrews, Marya Shanabrough, Erzsebet Borok, John D. Elsworth, Robert H. Roth, Mark W. Sleeman, Marina R. Picciotto, Matthias H. Tschöp, Xiao-Bing Gao, Tamas L. Horvath
Published in Volume 116, Issue 12
J Clin Invest. 2006; 116(12):3229–3239 doi:10.1172/JCI29867
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Figure 3
Synaptic remodeling induced by peripheral ghrelin in VTA DA cells.

(A) Ghrelin increased the number of synapses on VTA DA cells of wild-type mice (n = 5). Both total and asymmetric synaptic contacts were elevated, while the number of symmetric synapses was decreased. No synaptic changes were observed after peripheral ghrelin injection in Ghsr–/– mice (n = 5). P < 0.05, P < 0.01 versus respective saline-treated controls. (B and C) Electron micrographs showing typical TH-immunoreactive perikarya of the VTA from saline- (B) and ghrelin-treated (C) wild-type mice. Arrows in inset of B indicate a symmetric synapse. Arrows in C indicate asymmetric synaptic contacts. Asterisks indicate unlabeled axon terminals. Scale bar: 1 μm.