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Platelet morphology in Parkinson's disease: an electron microscopic study
S A Factor1, E Ortof, M P Dentinger
1Albany Medical College, Department of Neurology, NY 12208.
Journal of the Neurological Sciences
|March 1, 1994
Summary
Platelets in Parkinson's disease (PD) show significant morphological abnormalities, specifically larger intracytoplasmic vacuoles. These findings suggest platelets could serve as diagnostic markers for PD.
Area of Science:
- Neurology
- Hematology
- Cell Biology
Background:
- Parkinson's disease (PD) lacks peripheral diagnostic markers.
- Platelet studies suggest potential mitochondrial and monoamine oxidase abnormalities in PD.
Purpose of the Study:
- To investigate platelet morphology in Parkinson's disease using transmission electron microscopy (EM).
- To identify potential morphological differences between PD patients (treated and untreated) and healthy controls.
Main Methods:
- Transmission electron microscopy (EM) was used to examine platelets from 14 PD patients and 7 controls.
- Platelets were activated, fixed, and analyzed at magnifications of 15,000x and 40,000x.
- Morphometric analysis quantified vacuole size and cytoplasmic volume percentage.
Main Results:
- PD patients exhibited significantly larger intracytoplasmic vacuoles formed from the open canalicular system compared to controls (p < 0.05).
- The cytoplasmic volume percentage occupied by vacuoles was also significantly greater in PD patients.
- No abnormalities were observed in mitochondria, storage granules, or glycogen.
Conclusions:
- Platelets in Parkinson's disease patients display distinct morphological abnormalities.
- These platelet changes may be attributable to the disease, treatment, or both.
- Morphological platelet alterations present a potential avenue for PD diagnostic research.
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