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  • 1
    ISSN: 1435-1463
    Keywords: Spiperone binding ; Parkinson's disease ; multiple system atrophy ; vascular lesions ; differential diagnosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In order to investigate the diagnostic value of3H-spiperone binding capacity to lymphocytes in the differential diagnosis of de novo Parkinson's disease (idiopathic Parkinson syndrome, PD), we performed a double blind prospective study of spiperone binding capacity of 123 patients and 23 healthy control persons, belonging to different diagnostic groups (PD, Parkinsonian syndrome due to vascular lesions, multiple system atrophy [MSA], essential tremor). Diagnoses were based on medical history, clinical examination, CT or MRI scan, acute response to dopamimetric drugs, one year follow up, and long term response to L-DOPA treatment. Spiperone binding was assayed using ten different concentrations (0.03–3 nmol) in absence or presence of 1μmol (+)-butaclamol to determine nonsepecific binding. There was no significant difference in spiperone binding between patients with PD not treated with L-DOPA, and patients with other basal ganglia disorders including parkinsonian syndrome due to vascular lesions, multiple system atrophy, or progressive supranuclear palsy, and age matched controls. Binding was significantly higher in parkinsonian patients with PD treated with L-DOPA and patients with essential tremor. It is concluded that at present3H-spiperone binding gives no further information in the differential diagnosis of de novo Parkinson's disease.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1106
    Keywords: Neural grafting ; Neural transplantation ; Parkinson's disease ; Cryopreservation ; Fetal mesencephalon ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In the present study we quantitatively assessed to what extent freeze-storage at liquid nitrogen temperature influences the survival and function of fetal mesencephalic grafts in the dopamine-depleted rat striatum. Ventral mesencephalic (VM) tissue was dissected from rat fetuses and stored overnight in a preservative medium at 4 °C (hibernation). It was grafted intrastriatally either as a fresh cell suspension or was frozen as tissue fragments or as a cell suspension after stepwise incubation in ascending concentrations of dimethyl-sulphoxide. Following a cryopreservation interval of 80 days in liquid nitrogen, the frozen samples were rapidly thawed, rinsed, and grafted. Cellular viabilities of graft cell suspensions, as assessed by ethidium bromide/acridine orange staining, were decreased from 90% in fresh tissue to 38-35% in frozen and thawed tissue. Amphetamine-induced turning behavior at 6 weeks post-grafting was significantly attenuated in hosts that had received fresh grafts or grafts that were frozen as tissue fragments. Tyrosine hydroxylase-(TH-) immunocytochemistry of recipient brains revealed significant decreases in TH-positive graft cell numbers in rats grafted with cryopreserved tissue (38–42% of fresh tissue). Moreover, the dye exclusion viability of thawed VM tissue was found to accurately predict the subsequent graft survival. There was no difference with respect to graft cell numbers between the two freezing methods employed, though block storage seems to be more simple from a practical point of view. The present study indicates that freezing in liquid nitrogen may be a feasible method for long-term storage of fetal neural tissue for grafting, although a marked decrease in graft survival and function of cryopreserved tissue must be taken into account.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1435-1463
    Keywords: Parkinson's disease ; folinic acid ; tetrahydrobiopterin- and tetrahydrofolate metabolism ; motor performance series
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Folinic acid (15 mg bid, po) was administered in a two week, double-blind, placebocontrolled, cross over clinical trial in 5 patients with Parkinson's disease (Hoehn and Yahr stage I or II). 4 patients had not been on L-dopa treatment prior to entering this trial and one patient was on a small dose of L-dopa. No significant improvement could be detected in this pilot study by clinical evaluation and motor performance assessed by a computer assisted motor performance test.
    Type of Medium: Electronic Resource
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