In vivo PET measurements with [11C]PE2I to evaluate fetal mesencephalic transplantations to unilateral 6-OHDA-lesioned rats

Motoki Inaji, Takahito Yoshizaki, Takashi Okauchi, Jun Maeda, Yuji Nagai, Tadashi Nariai, Kikuo Ohno, Kiyoshi Ando, Hideyuki Okano, Shigeru Obayashi, Tetsuya Suhara

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Positron emission tomography (PET) is a useful tool to assess and visualize neurotransmissions in vivo. In this study, we performed repeated PET scans with [11C]PE2I, a tracer of the dopamine transporter, to evaluate the alteration of the expression of dopamine (DA) transmission component after a fetal mesencephalic transplantation. The fetal mesencephalic cells were transplanted into the striatum of unilateral 6-OHDA-lesioned rats. PET scans with [11C]PE2I were performed to evaluate the DA transporter before and 2 and 4 weeks after the transplantation. Rotation behavior tests, in vitro autoradiography, measurements of DA contents in the striatum by high-performance liquid chromatography (HPLC), and tyrosine hydroxylase (TH) immunohistological examinations were performed at the same time points and examined for their relationship to changes in the dopamine transporter. The number of ipsilateral rotations induced by methamphetamine injections decreased. DA contents in the striatum measured with HPLC significantly increased. In the PET study, the binding potential of [11C]PE2I increased at 4 weeks. The results of the in vitro autoradiography study corresponded with those of the PET study. The degrees of the change in the binding potentials correlated with those of the numbers of rotations in the behavioral study and the DA contents in the striatum. In the histological examination, TH-positive cells with axons were observed at 2 and 4 weeks after the transplantation. As the dopamine transporter exists only in the axon terminal of DA neurons, these results suggested that PET measurements of [11C]PE2I binding indicated not only survival, but maturity and functioning of the transplanted cells. Repeated PET measurements of DA transporters are a useful tool in assessing the effectiveness of neural transplantations.

Original languageEnglish
Pages (from-to)655-663
Number of pages9
JournalCell Transplantation
Volume14
Issue number9
DOIs
Publication statusPublished - 2005

Fingerprint

Positron emission tomography
Oxidopamine
Positron-Emission Tomography
Dopamine Plasma Membrane Transport Proteins
Rats
Transplantation
Dopamine
Tyrosine 3-Monooxygenase
Autoradiography
High performance liquid chromatography
High Pressure Liquid Chromatography
Methamphetamine
Dopaminergic Neurons
Presynaptic Terminals
N-(3-iodoprop-2-enyl)-2-beta-carbomethoxy-3-(4-methylphenyl)nortropane
Synaptic Transmission
Axons
Neurons
Injections
Cells

Keywords

  • 6-Hydroxydopamine (6-OHDA)
  • Dopamine transporter
  • PE2I
  • PET
  • Transplantation

ASJC Scopus subject areas

  • Cell Biology
  • Transplantation

Cite this

In vivo PET measurements with [11C]PE2I to evaluate fetal mesencephalic transplantations to unilateral 6-OHDA-lesioned rats. / Inaji, Motoki; Yoshizaki, Takahito; Okauchi, Takashi; Maeda, Jun; Nagai, Yuji; Nariai, Tadashi; Ohno, Kikuo; Ando, Kiyoshi; Okano, Hideyuki; Obayashi, Shigeru; Suhara, Tetsuya.

In: Cell Transplantation, Vol. 14, No. 9, 2005, p. 655-663.

Research output: Contribution to journalArticle

Inaji, Motoki ; Yoshizaki, Takahito ; Okauchi, Takashi ; Maeda, Jun ; Nagai, Yuji ; Nariai, Tadashi ; Ohno, Kikuo ; Ando, Kiyoshi ; Okano, Hideyuki ; Obayashi, Shigeru ; Suhara, Tetsuya. / In vivo PET measurements with [11C]PE2I to evaluate fetal mesencephalic transplantations to unilateral 6-OHDA-lesioned rats. In: Cell Transplantation. 2005 ; Vol. 14, No. 9. pp. 655-663.
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AU - Maeda, Jun

AU - Nagai, Yuji

AU - Nariai, Tadashi

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AU - Obayashi, Shigeru

AU - Suhara, Tetsuya

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