Orthostatic Dysregulation and Associated Gastrointestinal Dysfunction in Parkinson's Disease -Treatment
Information source: University of Zurich
ClinicalTrials.gov processed this data on August 23, 2015 Link to the current ClinicalTrials.gov record.
Condition(s) targeted: Autonomic Disturbances in Parkinson`s Disease
Intervention: Pyridostigmine bromide (Drug); fludrocortisone (Drug)
Phase: Phase 2
Status: Recruiting
Sponsored by: University of Zurich Official(s) and/or principal investigator(s): Christian Baumann, MD, Principal Investigator, Affiliation: University Hospital Zurich, Division of Neurology
Overall contact: Sebastian Schreglmann, MD, Phone: +41 (0)44 255 11 11, Email: sebastian.schreglmann@usz.ch
Summary
Disabling symptoms of blood pressure dysregulation, impaired swallowing and digestion are
common amongst Parkinson`s patients. So far the exact pathophysiology for this is not fully
understood. There are results from pathological analyses that the autonomic nervous system
is also affected by the accumulation of alpha-Synuclein and that this might even happen in
very early stages of the disease process (Qualman et al., 1984; Wakabayashi et al., 1989;
Wakabayashi et al., 1990; Bloch et al., 2006).
Blood pressure dysregulation is a common autonomic symptom in Parkinson`s patients and
treatment - currently most often achieved with Fludrocortisone - often leads to supine
hypertension (Plaschke et al., 1998; Braune et al., 1999; Magerkurth et al., 2005).
There are studies in patients with autonomic failure that indicate that Pyridostigmine
bromide might be an alternative treatment option without causing disabling supine
hypertension (Singer et al., 2003; Sandroni et al., 2005; Singer et al., 2006; Yamamoto et
al., 2006).
Delayed gastric emptying is also an autonomic symptom associated with Parkinson`s disease.
By the elevation of the cholinergic tone with Pyridostigmine bromide the investigators also
expect to alleviate symptoms of delayed gastric emptying and obstipation, possibly even
facilitating the uptake of dopaminergic medication through the gut (Sadjadpour, 1983;
Bharucha et al., 2008).
Therefore the investigators designed a monocentric randomized, controlled, double blind,
crossover phase II trial to show non-inferiority of the effect of pyridostigmine bromide vs.
fludrocortisone on symptoms of autonomic dysregulation in Parkinson`s disease.
Clinical Details
Official title: A Monocentric Randomized, Controlled, Double Blind, Crossover Phase II Trial to Show Non-inferiority of the Effect of Pyridostigmine Bromide vs. Fludrocortisone on Symptoms of Autonomic Dysregulation in Parkinson`s Disease
Study design: Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Crossover Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Treatment
Primary outcome: Changes in diastolic blood pressure drop on Schellong manoeuvreChanges in half emptying time t50 on 13C-sodium octanoate breath test
Secondary outcome: Efficacy of Pyridostigmine bromideEfficacy of Pyridostigmine bromide Safety & Tolerability of Pyridostigmine bromide
Detailed description:
In summary, investigators in recent years became more and more aware of the non-motor
symptoms of PD and their impact on affected individuals. Therefore therapeutic strategies to
ameliorate these symptoms are ever more needed. Sufficient clinical data for the treatment
of symptoms of blood pressure dysregulation is still lacking. This study is aiming at
closing this knowledge gap by comparing the efficacy and tolerability of a promising new
agent, pyridostigmine bromide with the standard treatment, fludrocortisone.
The proposed target of pyridostigmine in this respect is at the autonomic ganglion in the
efferent limb of the baroreflex. Via a reduction of acetylcholine breakdown the sympathetic
ganglionic transmission increases upon orthostatic stress (Singer et al., 2006).
Via the same mechanism we aim to facilitate gastrooesophageal motility and gastric emptying:
Both relaxation and contractibility of the oesophagus are known to be affected in PD
patients as shown in a manometric study (Sung et al., 2010). Both relaxation and
contractability are mainly influenced by nicotinergic and muscarinergic, cholinergic vagal
efferents to the oesophagus (Chang et al., 2003). Via a reduction of acetylcholine breakdown
we aim to increase the cholinergic tone and thereby normalize the reduced relaxation and
contractibility.
We also intent to show that this faster gastric transit results in a faster absorption of
Madopar into the bloodstream - we therefore will measure Levodopa and its metabolites during
the first 60mins after ingestion of 125mg fast-release Madopar in serial venous blood
samples via high-pressure liquid chromatography.
Eligibility
Minimum age: 50 Years.
Maximum age: 80 Years.
Gender(s): Both.
Criteria:
Inclusion criteria:
- informed, written & formal consent for participation
- male / female subjects, aged 50-80 years
- PD patients (18 subjects with symptomatic orthostatic hypotension)
Exclusion criteria: - Antihypertensive treatment
- medication influencing gastrointestinal motility for at least the elimination half
life of the drug
- medication interfering with blood-pressure regulation for at least the elimination
half life of the drug
- significant systemic illness
- BMI <18 or >30kg/m2
- symptoms or a history of GI disease or surgery
- with any evidence of infectious disease
- evidence or history of drug or alcohol abuse
- diabetes mellitus
Locations and Contacts
Sebastian Schreglmann, MD, Phone: +41 (0)44 255 11 11, Email: sebastian.schreglmann@usz.ch
University Hospital Zurich, Division of Neurology, Zurich, ZH 8091, Switzerland; Recruiting
Additional Information
Related publications: Singer W, Opfer-Gehrking TL, Nickander KK, Hines SM, Low PA. Acetylcholinesterase inhibition in patients with orthostatic intolerance. J Clin Neurophysiol. 2006 Oct;23(5):476-81. Sandroni P, Opfer-Gehrking TL, Singer W, Low PA. Pyridostigmine for treatment of neurogenic orthostatic hypotension [correction of hypertension]--a follow-up survey study. Clin Auton Res. 2005 Feb;15(1):51-3.
Starting date: June 2012
Last updated: November 25, 2013
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