Immunodetection of heparin-binding growth associated molecule (pleiotrophin) in striatal interneurons.
Pleiotrophin (PTN), a developmentally-regulated trophic factor, is over-expressed in the striatum of parkinsonian rats. Because striatal PTN can provide trophic support to dopamine neurons, we identified the cellular types containing PTN in the striatum of adult rats. By means of fluorescent double-immunolabeling, we found PTN to co-localize with a neuronal nuclei marker but not with glial fibrillary acidic protein. The number, distribution, and morphology of the PTN-immunolabeled cells suggested that they were interneurons. Further double-immunolabeling studies ruled out PTN localization to calretinin- and parvalbumin-containing interneurons. Instead, approximately 40% of the PTN-immunolabeled neurons contained nitric oxide synthase or somatostatin and approximately 60% expressed the vesicular acetylcholine transporter, supporting that they were GABAergic nitric oxide synthase/somatostatin-containing and cholinergic interneurons. Further work is necessary to determine if PTN from striatal interneurons can provide trophic support to dopamine neurons.
Taravini
Irene R E
IR
Laboratorio de Parkinson Experimental, Instituto de Investigaciones Farmacológicas, CONICET, Junín 956, 5 Piso, C1113AAD Buenos Aires, Argentina. taravini@ffyb.uba.ar
Ferrario
Juan E
JE
Delbe
Jean
J
Ginestet
Laure
L
Debeir
Thomas
T
Courty
José
J
Murer
M Gustavo
MG
Gershanik
Oscar S
OS
Raisman-Vozari
Rita
R
D000818:Animals; D015153:Blotting, Western; D064032:Calbindin 2; D002352:Carrier Proteins / Q000378:metabolism*; D016207:Cytokines / Q000378:metabolism*; D005260:Female; D005455:Fluorescent Antibody Technique; D005904:Glial Fibrillary Acidic Protein / Q000378:metabolism; D006801:Humans; D007120:Immunochemistry; D007150:Immunohistochemistry; D007395:Interneurons / Q000378:metabolism*; D008970:Molecular Weight; D017072:Neostriatum / Q000166:cytology / Q000378:metabolism*; D052250:Nitric Oxide Synthase Type III / Q000378:metabolism; D010320:Parvalbumins / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar; D064030:S100 Calcium Binding Protein G / Q000378:metabolism; D050494:Vesicular Acetylcholine Transport Proteins / Q000378:metabolism
C576764:CALB2 protein, human; C576512:Calb2 protein, rat; D064032:Calbindin 2; D002352:Carrier Proteins; D016207:Cytokines; D005904:Glial Fibrillary Acidic Protein; D010320:Parvalbumins; D064030:S100 Calcium Binding Protein G; D050494:Vesicular Acetylcholine Transport Proteins; C066845:pleiotrophin; D052250:Nitric Oxide Synthase Type III