The nigrostriatal dopaminergic system in MPTP-treated mice shows more prominent recovery by syngeneic adrenal medullary graft than by allogeneic or xenogeneic graft - PubMed (original) (raw)
Comparative Study
. 1991 Apr 5;545(1-2):191-8.
doi: 10.1016/0006-8993(91)91286-a.
Affiliations
- PMID: 1860045
- DOI: 10.1016/0006-8993(91)91286-a
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Comparative Study
The nigrostriatal dopaminergic system in MPTP-treated mice shows more prominent recovery by syngeneic adrenal medullary graft than by allogeneic or xenogeneic graft
I Date et al. Brain Res. 1991.
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Abstract
Following systemic injection of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP), young (2-month-old) C57BL/6 mice show decreased dopaminergic (DA) nigrostriatal fibers and DA concentration in the striatum. We transplanted syngeneic, allogeneic and xenogeneic adrenal medullary grafts into the striatum of the MPTP-treated young mice and compared the survivability of grafted chromaffin cells and the recovery of intrinsic host DA fibers using computerized image analysis of tyrosine hydroxylase (TH)-immunoreactive (IR) fibers and high performance liquid chromatography with electrochemical detection (LCEC). The grafted syngeneic adrenal chromaffin cells survived better than allogeneic or xenogeneic chromaffin cells, and host DA nigrostriatal fiber recovery was more prominent in mice with a syngeneic graft than in mice with an allogeneic or xenogeneic graft. However, the degree of host fiber recovery in mice with allogeneic or xenogeneic mice was greater than in mice with a sham operation alone, even though the allografts and xenografts had no surviving chromaffin cells. Allografts and xenografts showed prominent rejection responses, with T lymphocyte infiltration in addition to macrophages. We conclude that a syngeneic adrenal graft survives better than an adrenal allograft or xenograft and promotes recovery of the intrinsic host nigrostriatal DA fibers. We also conclude that grafted chromaffin cell survivability influences the degree of host DA fiber recovery following MPTP depletion. Adrenal medullary grafts to Parkinsonian patients are currently under way in a large number of hospitals; we suggest that greater attention be paid to methods which lead to enhanced survival of the grafted chromaffin cells, since survivability might be closely related to the functional recovery of these patients.
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