Notably, while AxV binding tended to be higher in neurons pretreated with CRT compared to those treated with NMDA alone, this difference did not reach statistical significance ( P = 0.07) (Fig. 5B ).
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Down-regulation of neuroprotective protein kinase D in Huntington´s disease.
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Contrary to expectations, analysis by qRT-PCR of PRKD1 mRNA content in the striatum and cortex of HD patients and control subjects showed a trend towards an increase in HD striatum, with a significant upregulation of PRKD1 transcripts observed in HD cortex (Fig. 1D ).
In contrast, NMDA treatment induced a highly significant increase in AxV binding, with the most pronounced and statistically significant effects observed at the earliest time point (30 min) following NMDA stimulation (Fig. 5B ).
In contrast to these findings, we observed a substantial reduction in PKD protein levels in the striatum, the primarily affected brain structure in HD, with a clear trend toward decreased levels in the cerebral cortex of HD patients.