Evaluation of the Subjective and Objective Painful Threshold in Multiple System Atrophy Pain and Multiple System Atrophy
Status:
Completed
Trial end date:
2013-11-01
Target enrollment:
Participant gender:
Summary
Multiple system atrophy (MSA) is a sporadic neurodegenerative disorder. MSA is dominated by
autonomic/urogenital failure which may be associated with either Parkinsonism (MSA-P subtype)
or with cerebellar ataxia (MSA-C subtype). The prognostic of this disease is bad because it
ended with the patient's death few years later. No neuroprotective treatment has shown a real
efficacy. 50% of patients suffering of MSA frequently experienced painful sensation. The
origin of this pain is unknown. In Parkinson disease (PD) ; arguments suggest the implication
of dopamine neuromediator pathway in integration and modulation of pain. Several studies
suggest the existence of various influences with dopamine implication in the appearance of
painful sensation and that would be inhibitory. That's why observed painful symptoms in MSA
and PD could be due to a decrease of pain appearance threshold, secondary to a lost of
control of sensitizes centres, to Parkinson control.
It is interesting to determine if MSA as PD is responsible for a decrease of pain threshold
and to characterise the levodopa effect on the patient's pain threshold. Better
physiopathology knowledge of pain in MSA is necessary to improve the therapeutic care.
Because the efficacy of others treatments is low, it's important to improve the research for
a better comfort of patients with a better understanding, analysing and treating of the pain.