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NephrolithiasisPhase 2NCT00860093

Efficacy and Safety of Using MPC-5971 in Subjects Undergoing Shock Wave Lithotripsy

A Phase 2 study testing MPC-5971 in people with Nephrolithiasis, run by Mission Pharmacal at 3 sites in United States.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Official record
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Trial summary

The purpose of this study is to evaluate the efficacy of MP-5971 in facilitating stone passage after Shock Wave Lithotripsy treatment. Read more about this study

Who is it for?
Ages 18 to 70 years
Conditions the study is for
Nephrolithiasis
What is being tested?
MPC-5971
Type of treatment
Pill or oral medicine
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
135 participants
Where
3 sitesUnited States
Study dates
Apr 2010to Dec 2010
Phase
Phase 2
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 70 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Male or female subject aged > or equal to 18 to < or equal to 70.
  • Subject has undergone a computerized tomography (CT) scan within 30 days of the screening visit.
  • Subject has been diagnosed with single unilateral renal calculus (target treatment stone).
  • Target treatment stone, is presumed to be of calcium composition and/or uric acid composition.
  • Target treatment stone is between > or equal to 5 and < or equal to 15 mm in diameter.
  • Contra lateral kidney may hold a clinically inconsequential size calculus that does not require concurrent SWL treatment.
Show all 12Show fewer
  • Both kidneys are anatomically normal.
  • An appropriate candidate for SWL, determined by treating physician.
  • Female subjects with a negative pregnancy test, hysterectomy, tubal ligation or non-child bearing potential (post-menopausal).
  • Female subjects of child bearing potential with a negative pregnancy test and taking appropriate birth control for the duration of the study.
  • Urine is pyuria negative and nitrite negative on dipstick and/or negative upon microscopic evaluation.
  • Subject must voluntarily consent to participate in this study and provide his/her written informed consent prior to start of any study-specific procedures.

Who cannot join

  • Current or past history of cystine stones or infection stones.
  • Renal insufficiency, defined as serum creatinine value outside of the normal reference range.
  • Currently has or had hyperkalemia within the past six months, defined as serum potassium outside of the normal reference range.
  • Currently has or had hypermagnesemia within the past six months, defined as serum magnesium outside of the normal reference range.
  • Active urinary tract infection.
  • Renal calculi in an anatomically abnormal kidney; horseshoe shape, ureteropelvic junction obstruction or calyceal diverticulum.
Show all 26Show fewer
  • Altered urinary tract anatomy such as a transplant kidney, urinary reconstruction or congenital anomaly.
  • Blood coagulopathies and or taking anticoagulants (warfarin, coumarin, heparin).
  • Taking salicylate (aspirin), including low dose aspirin for cardio-prophylaxis or other NSAID (OTC) that may increase bleeding time, within the past 7 days.
  • History of complications with previous SWL; pyelonephritis, perinephric hematoma.
  • Unsuccessful SWL treatments for previous stone within the past six months.
  • Currently has or previously had ulcers of the esophagus, stomach and/or small intestines.
  • Chronic diarrhea or has a history of diarrhea.
  • Bowel disease such as Crohn's disease, Celiac disease, fat malabsorption or Sprue.
  • Undergone any bariatric surgery procedures.
  • Obese, defined as BMI >30.
  • Uncontrolled hypertension defined as subjects taking medication specific for hypertension or subject not on medication with systolic blood pressure above 140 and diastolic above 90.
  • Adrenal insufficiency (i.e., Addison's disease), adrenal tumors, and/or subjects on adrenal hormone replacement therapy.
  • Taking potassium-sparing diuretics (triamterene, amiloride, spironolactone, Midamor®, Aldactone®, Dyrenium®, Eplerenone®).
  • Taking potassium supplements (Rx or OTC) within the past 15 days.
  • Taking magnesium supplements (Rx or OTC) within the past 15 days.
  • Taken potassium citrate supplements (Rx or OTC) within the past 30 days.
  • Subject taking anticholinergic medications at entry (dicyclomine, atropine, scopolamine, oxybutynin, tolerodine, Cogentin®, Sinemet®, Robinal®, Kenadrin®, Artane®, Enablex®, Detrol®, Vesicare®, Sanctura®, Ditropan®, Oxytrol®, Bentyl®, Byclomine®, Dibent®, Di-Spaz®, or Dilomine®). (Subjects may be prescribed anticholinergics as standard of care with use of stents post entry.)
  • Subject is has taken gastrointestinal enzyme replacement therapy or proton pump inhibitors within past 30 days (Ultrase®, Creon®, Viokase®, Pancrease® MT, pancrelipase agents, Aciphex®, Nexium®, Prevacid®, Protonix®, Zegerid® Prilosec OTC®, Kapidex®, rabeprazole, esomeprazole, lansoprazole, pantoprazole, omeprazole, dexlansoprazole).
  • Women who are pregnant or lactating.
  • Subjects with a known hypersensitivity to potassium, magnesium, citrate or any excipients in the drug formulation

Trial locations and contacts

3 sites in 1 country.

United States3 sites
  • Columbus Urology Research

    Columbus, Ohio, 43220

  • Urology Clinics of North Texas, PA

    Dallas, Texas, 75231

  • Idaho Urologic Institute

    Meridian, Idaho, 83642

Other trials in United States

About this study

Official title: A Multi-Site Placebo-Controlled Randomized Double-Blind Study to Evaluate the Efficacy and Safety of Using MPC-5971 as Adjuvant Therapy in Subjects Undergoing Shock Wave Lithotripsy

The purpose of this study is to evaluate the efficacy of MP-5971 in facilitating stone passage after Shock Wave Lithotripsy treatment.

Read the detailed description

Shock Wave Lithotripsy (SWL) is widely utilized as a first line therapy in patients with renal calculi. SWL is associated with limited morbidity, however, complications relating to stone fragment passage after treatment can occur, the most serious being ureter obstruction. In addition, the growth and agglomeration of residual fragments after SWL treatment, in approximately 40% of patients, will lead to another stone episode within 12 months. Adjunct therapy with MPC-5971 should reduce the risk of complications of residual stone fragments by facilitating passage, preventing blockage and inhibiting growth and enlargement of residual fragments. This is based on MPC-5971's ability to increase urinary inhibitors against growth and agglomeration of stone fragments and by reducing urinary saturation of calcium oxalate and uric acid. The objective is to see a decrease in fragment complications and a significant increase in the stone free rate at 3 months following SWL treatment in combination with MPC-5971.

Conditions
Nephrolithiasis
Being tested
placebo, MPC-5971
Keywords
Kidney Calculi, Urolithiasis, Lithotripsy, potassium compounds, magnesium compounds
Medical subject headings
Nephrolithiasis, Kidney Calculi, Urolithiasis

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • placeboOther

    After SWL treatment subjects will be randomized to receive either MPC-5971 or placebo. Two tablets of MPC-5971 or placebo will be taken orally twice a day (bid). This will give a daily dosage equal to 40 mEq of potassium, 20 mEq of magnesium and 60 mEq of citrate. MPC-5971 or placebo will be taken bid for 90 days beginning immediately after SWL treatment.

  • MPC-5971Drug

    After SWL treatment subjects will be randomized to receive either MPC-5971 or placebo. Two tablets of MPC-5971 or placebo will be taken orally twice a day (bid). This will give a daily dosage equal to 40 mEq of potassium, 20 mEq of magnesium and 60 mEq of citrate. MPC-5971 or placebo will be taken bid for 90 days beginning immediately after SWL treatment.

Study groups in NCT00860093
Study groupRoleWhat they receive
1ExperimentalMPC-5971
Receives: Drug: MPC-5971
2Placebo comparatorplacebo identical in appearance to study drug
Receives: Other: placebo

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. stone free rate after SWL treatment

    Measured: 12 weeks

Secondary outcomes (3)
  1. increase in urine inhibitors

    Measured: 4 week and 12 week

  2. Reduced need for secondary procedures such as URS to clear obstructive fragments

    Measured: 12 weeks

  3. reduced stone/fragment area (mm2),percent change from the treatment stone area (mm2)

    Measured: 12 weeks

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted11 Mar 2009 (estimated)
  2. Study startApr 2010
  3. Primary completionNov 2010
  4. Study completionDec 2010

Why it stopped: Sponsor Corporate Business Decision

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Triple blind
Who is masked
Participant, Investigator, Outcomes assessor
Enrolment
135 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT00860093
Sponsor's protocol ID
MPC-5971
Status last verified
Mar 2019
First submitted
10 Mar 2009
Last updated
7 Mar 2019
Results posted
No
Data monitoring committee
Yes

Publications

  • Koenig K, Padalino P, Alexandrides G, Pak CY. Bioavailability of potassium and magnesium, and citraturic response from potassium-magnesium citrate. J Urol. 1991 Feb;145(2):330-4. doi: 10.1016/s0022-5347(17)38330-1.

    PubMed 1988724
  • Pak CY, Koenig K, Khan R, Haynes S, Padalino P; New Collective Author. Physicochemical action of potassium-magnesium citrate in nephrolithiasis. J Bone Miner Res. 1992 Mar;7(3):281-5. doi: 10.1002/jbmr.5650070306.

    PubMed 1585829
  • Ettinger B, Pak CY, Citron JT, Thomas C, Adams-Huet B, Vangessel A. Potassium-magnesium citrate is an effective prophylaxis against recurrent calcium oxalate nephrolithiasis. J Urol. 1997 Dec;158(6):2069-73. doi: 10.1016/s0022-5347(01)68155-2.

    PubMed 9366314
  • Gonzalez GB, Pak CY, Adams-Huet B, Taylor R, Bilhartz LE. Effect of potassium-magnesium citrate on upper gastrointestinal mucosa. Aliment Pharmacol Ther. 1998 Jan;12(1):105-10. doi: 10.1046/j.1365-2036.1998.00280.x.

    PubMed 9692708
  • Ruml LA, Wuermser LA, Poindexter J, Pak CY. The effect of varying molar ratios of potassium-magnesium citrate on thiazide-induced hypokalemia and magnesium loss. J Clin Pharmacol. 1998 Nov;38(11):1035-41. doi: 10.1177/009127009803801108.

    PubMed 9824785
  • Ruml LA, Gonzalez G, Taylor R, Wuermser LA, Pak CY. Effect of varying doses of potassium-magnesium citrate on thiazide-induced hypokalemia and magnesium loss. Am J Ther. 1999 Jan;6(1):45-50. doi: 10.1097/00045391-199901000-00007.

    PubMed 10423646
  • Ruml LA, Pak CY. Effect of potassium magnesium citrate on thiazide-induced hypokalemia and magnesium loss. Am J Kidney Dis. 1999 Jul;34(1):107-13. doi: 10.1016/s0272-6386(99)70115-0.

    PubMed 10401023
  • Wuermser LA, Reilly C, Poindexter JR, Sakhaee K, Pak CY. Potassium-magnesium citrate versus potassium chloride in thiazide-induced hypokalemia. Kidney Int. 2000 Feb;57(2):607-12. doi: 10.1046/j.1523-1755.2000.00881.x.

    PubMed 10652038
  • Jaipakdee S, Prasongwatana V, Premgamone A, Reungjui S, Tosukhowong P, Tungsanga K, Suwantrai S, Noppawinyoowong C, Maskasame S, Sriboonlue P. The effects of potassium and magnesium supplementations on urinary risk factors of renal stone patients. J Med Assoc Thai. 2004 Mar;87(3):255-63.

    PubMed 15117041
  • Tosukhowong P, Tungsanga K, Phongudom S, Sriboonlue P. Effects of potassium-magnesium citrate supplementation on cytosolic ATP citrate lyase and mitochondrial aconitase activity in leukocytes: a window on renal citrate metabolism. Int J Urol. 2005 Feb;12(2):140-4. doi: 10.1111/j.1442-2042.2005.01001.x.

    PubMed 15733107
  • Sriboonlue P, Jaipakdee S, Jirakulsomchok D, Mairiang E, Tosukhowong P, Prasongwatana V, Savok S. Changes in erythrocyte contents of potassium, sodium and magnesium and Na, K-pump activity after the administration of potassium and magnesium salts. J Med Assoc Thai. 2004 Dec;87(12):1506-12.

    PubMed 15822549
  • Odvina CV, Mason RP, Pak CY. Prevention of thiazide-induced hypokalemia without magnesium depletion by potassium-magnesium-citrate. Am J Ther. 2006 Mar-Apr;13(2):101-8. doi: 10.1097/01.mjt.0000149922.16098.c0.

    PubMed 16645424
  • Zerwekh JE, Odvina CV, Wuermser LA, Pak CY. Reduction of renal stone risk by potassium-magnesium citrate during 5 weeks of bed rest. J Urol. 2007 Jun;177(6):2179-84. doi: 10.1016/j.juro.2007.01.156.

    PubMed 17509313

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing MPC-5971 in people with Nephrolithiasis, run by Mission Pharmacal at 3 sites in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 12 inclusion and 26 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: stopped early, as of the sponsor's last update on 7 Mar 2019. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 3 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study was stopped early (reason given: Sponsor Corporate Business Decision). Results are not available in the source record.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

stone free rate after SWL treatment (time frame: 12 weeks). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT00860093, which also lists 13 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 7 Mar 2019.

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