Dopamine transporter (Dat) and synaptic vesicle amine transporter (VMAT2) gene expression in the substantia nigra of control and Parkinson's disease - PubMed (original) (raw)
Dopamine transporter (Dat) and synaptic vesicle amine transporter (VMAT2) gene expression in the substantia nigra of control and Parkinson's disease
K A Harrington et al. Brain Res Mol Brain Res. 1996 Feb.
Abstract
The cellular expression of DAT mRNA and VMAT2 mRNA was investigated in sections of the human post-mortem substantia nigra in control and Parkinson's disease tissue using in situ hybridisation techniques. Short synthetic oligodeoxynucleotides were used to detect these gene transcripts at the cellular level. In the control human nigra, high levels of expression were seen in all sub-divisions of the substantia nigra, especially within medial regions. By contrast, the level of expression of both DAT mRNA and VMAT2 mRNA was markedly reduced in Parkinson's disease; these reductions in hybridisation signal were associated with (i) a marked loss of dopamine-containing cells in the substantia nigra, and (ii) a reduction in both DAT and VMAT2 signal per cell in the remaining pigmented neurones. These disease-related decreases in the cellular abundance of both DAT and VMAT2 gene transcripts in the surviving cells of the parkinsonian nigra may reflect compensatory changes in catecholamine signalling or may be a consequence of neuronal dysfunction.
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