To compare the efficacy of a fixed dose of SC methylnaltrexone to induce laxation in patients receiving palliative care with constipation due to either fentanyl, oxycodone or morphine sulphate (opioids with different mechanisms of action). Secondary…
ID
Source
Brief title
Condition
- Gastrointestinal motility and defaecation conditions
Synonym
Research involving
Sponsors and support
Intervention
Outcome measures
Primary outcome
The proportion of subjects that has a rescue-free laxation response within 4
hours after at least 2 of the first 4 doses (the first week of treatment).
Secondary outcome
- time to first laxation
- laxation within 4 hours after the first dose of study drug
- laxation within 4 or 24 hours after each dose
- laxation within 4 hours after at least 4 of the maximum 7 doses
- number of laxations per week
- change in BFI score between day 0 and 14
Other study parameters:
1. Changes in leukocyte subsets and serum cytokine levels. The frequency of the
following leukocyte subsets will be evaluated: T-, B-, NK-cells,
monocytes/macrophages, MDSC, DC subsets, neutrophilic granulocytes, and
regulatory cell populations (invariant NKT cells, CD4+CD25+FOXP3+ regulatory T
cells). Serum cytokine levels will include e.g. IFN-γ, IL-2, IL-4, IL-5, IL-6,
IL-10, IL-17 and TNF-α.
2. Determination of the angiogenic profile by determination of angiogenic
factor blood concentrations and the systemic levels of endothelial progenitor
cells.
3. Determination of the angiogenic potential of blood on in vitro endothelial
cell proliferation assays before and during treatment with methylnaltrexone (in
a subgroup of patients, maximally n = 10 per group).
Background summary
Methylnaltrexone for the treatment of opioid-induced constipation in the
setting of palliative or hospice care, is significantly more effective than
placebo. However, in both the randomized and the open-label phase of the multi
center trial showing this favorable outcome, the drug produced rescue-free
laxation in only about half of the patients. There may be several reasons for
this result, since constipation in palliative care patients often has multiple
simultaneously occurring causes.
Assuming that constipation of the non-responders is still opioid-induced, one
of the possible reasons for not responding to methylnaltrexone could be that
central actions of opioids contribute to constipation by reducing motility of
the intestines through direct actions in the spinal dorsal horn. However, as
methylnaltrexone is a µ-receptor antagonist and not all opioids are solely µ-
receptor agonists another reason may well be that successful laxation is
determined by the receptor-profile of the specific opioid the patient is using.
Opioids do not only influence bowel functioning, but also immune system
functioning and angiogenesis. Methylnaltrexone possibly antagonizes these
changes, therefore this study will also investigate the influence of
methylnaltrexone on immunologic and angiogenic parameters.
Study objective
To compare the efficacy of a fixed dose of SC methylnaltrexone to induce
laxation in patients receiving palliative care with constipation due to either
fentanyl, oxycodone or morphine sulphate (opioids with different mechanisms of
action). Secondary objectives are to evaluate the influence of methylnaltrexone
on immunologic function and angiogenic activity of patients on opioid
treatment.
Study design
A prospective observational study with an exploratory part on immunologic and
angiogenic functioning. Study patients are divided over three groups depending
on the type of opioid they use, being either morphine sulphate (n=78), oxycodon
(n=78) or fentanyl (n=39). All patients will receive methylnaltrexone 8 mg, 12
mg or 0.15 mg/kg (depending on their weight) every other day for 14 days. From
patients participating in the exploratory part of the study 58 ml of blood will
be drawn on days 0, 1, 14 and 42.
Study burden and risks
Methylnaltrexone has been registered for this indication. Therefore
participation in this trial does not cause any extra risks. Common side effects
of methylnaltrexone are abdominal pain, nausea, flatulence and diarrhea. Other
possible side effects are dizziness and local reactions at the injection site
such as erythema, pruritus and edema. Rare side effects that are mentioned are
abdominal cramps, increased body temperature, GI perforation, muscle spasm and
syncope.
De Boelelaan 1117
Amsterdam 1081 HV
NL
De Boelelaan 1117
Amsterdam 1081 HV
NL
Listed location countries
Age
Inclusion criteria
1. Age >= 18 years
2. Receiving supportive care
3. Life expectancy >= 2 weeks
4. Able to give informed consent
5. Receiving opioid treatment with either morphine sulphate, oxycodone or fentanyl
6. Opioid treatment, both
a) On a regular schedule (not just as needed or rescue doses) for the control of pain or dyspnea for at least 2 weeks before the first dose of methylnaltrexone, and
b) On a stable opioid regimen for at least 3 days before the first dose of methylnaltrexone. This is defined as no dose reduction of >= 50%, dose increases are permitted.
7. If a subject uses a combination of short- and long-acting (including continuous administration) opioids, the short-acting opioid should preferably be of the same type as the long-acting opioid. If the subject uses a different type of short-acting opioid than the long-acting opioid, the subject is allowed to enter the study if he/she has used this short-acting opioid <= 2 times a day in the past three days.
8. Has diagnosis of constipation, defined as either
a) < 3 bowel movements during the previous week by history and no clinically notable laxation* in the 24 hours before the first dose of methylnaltrexone, or
b) No clinically notable laxation* in the 48 hours before the first dose of methylnaltrexone.
9. Constipation is defined as opioid induced, determined by investigator
10. On stable laxative regimen for >= 3 days before the first dose of methylnaltrexone. This is defined as at least one type of laxative in an adequate dosing regimen, (e.g. macrogol 2 packets daily, magnesium(hydr)oxide 500 mg three times daily, bisacodyl 10 mg daily or sennoside A+B 10 ml daily) or at least two types of laxatives in a suboptimal dose with patient characteristics hampering optimal treatment.
11. If the subject is a woman with presumed child bearing potential; negative urine pregnancy test at screening
12. Surgically sterile or agrees to use a medically acceptable method of birth control or practice sexual abstinence for the duration of the methylnaltrexone treatment and the following 15 days. ~;* including laxation after rescue laxative or enema
~ not necessary for postmenopausal women
Exclusion criteria
1. Previous treatment with methylnaltrexone while using the same opioid subtype
2. Known or suspected mechanical gastrointestinal obstruction
3. Presence of an other cause of bowel dysfunction that is considered to be a major contribution to the constipation according to investigator
4. Presence of a peritoneal catheter for intraperitoneal chemotherapy or dialysis
5. Clinically relevant active diverticular disease
6. History of bowel surgery within 10 days before first dose of methylnaltrexone
7. Fecal ostomy, except for patients who*s defecation pattern was comparable to patients without a fecal ostomy before start of this constipation episode.
8. Use of vinca alkaloids within previous 4 months
9. Body weight <38 kg
10. Renal failure defined as EGFR <30 ml/min per 1.73m2 or requires dialysis.
11. Known or suspected allergy to methylnaltrexone or similar compounds (e.g. naltrexone or naloxone)
12. Participation in a study with investigational products within 30 days before first dose of methylnaltrexone.
13. Pregnant or nursing
14. Clinically important abnormalities that may interfere with participation or compliance to the study, determined by investigator ;Additional exclusion criteria for the immunologic and angiogenic analysis part of the study:
15. Chemotherapy or treatment with tyrosine kinase inhibitor during 4 weeks before inclusion or treatment scheduled during participation in this study.
16. Treatment with high dose corticosteroids during 2 weeks before inclusion in this study. This is defined as the equivalent of 30 mg of prednisone per day for >= 2 consecutive days.
Design
Recruitment
Medical products/devices used
Followed up by the following (possibly more current) registration
No registrations found.
Other (possibly less up-to-date) registrations in this register
No registrations found.
In other registers
Register | ID |
---|---|
EudraCT | EUCTR2012-000850-75-NL |
CCMO | NL39951.029.12 |