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Expression of protein kinase C‐substrate mRNAs in the basal ganglia of adult and infant macaque monkeys
Author(s) -
Higo Noriyuki,
Oishi Takao,
Yamashita Akiko,
Murata Yumi,
Matsuda Keiji,
Hayashi Motoharu
Publication year - 2006
Publication title -
journal of comparative neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.855
H-Index - 209
eISSN - 1096-9861
pISSN - 0021-9967
DOI - 10.1002/cne.21119
Subject(s) - biology , basal ganglia , globus pallidus , in situ hybridization , nucleus accumbens , substantia innominata , substantia nigra , medium spiny neuron , neurogranin , 5 ht4 receptor , putamen , ventral pallidum , striatum , neuroscience , microbiology and biotechnology , basal forebrain , messenger rna , protein kinase c , central nervous system , signal transduction , dopamine , receptor , biochemistry , dopaminergic , gene , serotonin
We performed in situ hybridization histochemistry on the monkey basal ganglia to investigate the mRNA localization of three protein kinase C substrates (GAP‐43, MARCKS, and neurogranin), of which expression plays a role in structural changes in neurites and synapses. Weak hybridization signals for GAP‐43 mRNA and intense signals for both MARCKS and neurogranin mRNAs were observed in the adult neostriatum. All three of the mRNAs were expressed in both substance P‐positive direct pathway neurons and enkephalin‐positive indirect pathway neurons. In the nucleus accumbens, the hybridization signals for the three mRNAs were weaker than those in the neostriatum. Double‐label in situ hybridization histochemistry in the neostriatum revealed that GAP‐43 and neurogranin mRNAs were expressed in a subset of MARCKS‐positive neurons. While intense hybridization signals for MARCKS mRNA were observed in all of the other basal ganglia regions such as the globus pallidus, substantia innominata, subthalamic nucleus, and substantia nigra, intense signals for GAP‐43 mRNA were restricted to the substantia innominata and substantia nigra pars compacta. No signal for neurogranin mRNA was observed in the basal ganglia regions outside the neostriatum and the nucleus accumbens. These results indicate that the protein kinase C substrates are abundant in some specific connections in cortico‐basal ganglia circuits. Developmental analysis showed that the expression level in the putamen and nucleus accumbens, but not in the caudate nucleus, was higher in the infant than in the adult, suggesting that synaptic maturation in the caudate nucleus occurs earlier than that in the putamen and nucleus accumbens. J. Comp. Neurol. 499:662–676, 2006. © 2006 Wiley‐Liss, Inc.