Secondary HyperparathyroidismPhase 1/2NCT00415584
Cinacalcet to Treat Hypercalcemia in Renal Transplant Recipients
A Phase 1/2 study testing Cinacalcet HCl in people with Secondary Hyperparathyroidism and Hypercalcemia, run by Montefiore Medical Center at 1 site in United States.
Trial summary
Secondary hyperparathyroidism can persist following successful renal transplantation and can cause high blood calcium, kidney dysfunction or failure and excessive bone loss among other problems. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Secondary Hyperparathyroidism, Hypercalcemia
- What is being tested?
- Cinacalcet HCl
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 4 participants
- Where
- 1 siteUnited States
- Study dates
- 9 Feb 2007to Nov 2009
- Phase
- Phase 1/2
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
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 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Renal transplant recipient at least 3 months post transplant
- Hypercalcemic, with serum calcium > 10.5 milliequivalents per liter (mEq/L)
- Persistent hyperparathyroidism, with inappropriately elevated parathyroid hormone (PTH)
Who cannot join
- Allergic to Cinacalcet HCl, tetracycline
- Pregnant
- On medication that utilizes same liver system as Cinacalcet HCl
Trial locations and contacts
1 site in 1 country.
United States1 site
Montefiore Medical Center
The Bronx, New York, 10467
About this study
Official title: Cinacalcet for Treatment of Persistent Secondary Hyperparathyroidism in Renal Transplant Recipients: Effect on Renal Function, Serum Calcium and Bone Histomorphometry
Secondary hyperparathyroidism can persist following successful renal transplantation and can cause high blood calcium, kidney dysfunction or failure and excessive bone loss among other problems. If the condition does not resolve, surgery is frequently required to remove the parathyroid glands, with all the inherent risks of surgery. Cinacalcet, a medicine used to treat secondary hyperparathyroidism in patients with kidney disease, may be effective in treating this condition in renal transplant recipients. The investigator team will study the effect of cinacalcet on calcium, bone and renal function in a 6 month treatment protocol.
Read the detailed description
Secondary Hyperparathyroidism in the renal transplant recipient can cause abnormal bone and mineral metabolism, resulting in hypercalcemia that is detrimental to renal function, causing renal dysfunction and calcinosis. These patients often require parathyroidectomy to correct the hypercalcemia. Surgery is not without significant risk to the patient. Risks include vocal cord paralysis, protracted hypocalcemia, cardiac arrhythmias, muscle cramps. In addition, parathyroidectomy has been associated with subsequent renal impairment.
Cinacalcet is a calcimimetic agent that is very effective in the treatment of secondary hyperparathyroidism in patients with renal failure as well as in hypercalcemia of parathyroid cancer. There have been reports of short term Cinacalcet use in renal transplant recipients. Serum calcium was improved in these patients.
However, little is known about the effect of cinacalcet on bone activity and turnover. It is not known whether Cinacalcet causes low turnover bone activity with adynamic bone disease. It is known that low turnover bone disease in renal patients can by itself cause hypercalcemia as the bone becomes static and unable to respond to everyday calcium loads.
Studies have shown that adynamic bone can develop in renal transplant recipients under a variety of conditions. It is not known what effect, if any, cinacalcet has on the bone activity of renal transplant recipients with persistent secondary hyperparathyroidism.
The purpose of the study is to determine the effect of Cinacalcet on serum calcium, renal function and bone histology in renal transplant recipients.
This is a prospective, open-label study. Protocol procedures will include baseline and 6 month measurements of bone mineral density, bone biochemical parameters, glomerular filtration rate, anterior iliac crest bone biopsy. Subjects will start cinacalcet after the first biopsy. The medication will be titrated to normalize serum calcium. Medication will be supplied by the study. Serum electrolytes will be monitored as indicated.
- Conditions
- Secondary Hyperparathyroidism, Hypercalcemia
- Being tested
- Cinacalcet HCl
- Keywords
- hypercalcemia, transplant
- Medical subject headings
- Hyperparathyroidism, Secondary, Hypercalcemia
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Cinacalcet HClDrug
| Study group | Role | What they receive |
|---|---|---|
| Cinacalcet Hydrochloride (HCl) | Experimental | Not described Receives: Drug: Cinacalcet HCl |
What is being measured
The primary outcome is the main question the study is designed to answer.
Normalization of Serum Calcium Levels
Serum calcium was to have been assessed by drawing venous blood samples for serum analysis. Normal blood calcium levels for adults range from approximately 8.5 to 10.4 mg/dL, but vary depending on laboratory reference ranges. Changes in serum calcium levels from baseline following treatment with Cinacalcet HCl were to have been summarized and evaluated using paired t-tests.
Measured: Baseline to 6 Months
Secondary outcomes (2)
Changes in Renal Function
Change in renal function from baseline was to have been assessed at 6 months based on a measurement of Glomerular Filtration Rate (GFR). Normal GFR ranges vary based on age, sex, and body size but are typically > 90 mL/min/1.73 m^2 for healthy individuals. Changes in renal glomerular filtration rate from baseline following treatment with Cinacalcet HCl were to have been summarized and evaluated using paired t-tests.
Measured: Baseline to 6 Months
Changes in Bone Mineral Density
Changes in bone mineral density was assessed using central dual energy x-ray absorptiometry (DXA or DEXA). DXA uses radiation to measure how much calcium and other minerals are in a specific area of the bone. For this study, changes in bone mineral density of the left hip, lumbar spine, and left forearm (vs baseline) have been summarized and reported as a percentage change from baseline. Statistical t-tests were not conducted due to limited sample size.
Measured: Baseline to 6 Months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted25 Dec 2006 (estimated)
- Study start9 Feb 2007
- Primary completionNov 2009
- Study completionNov 2009
Why it stopped: Based on information in IRB archives the study was terminated in 2009 due to low enrollment
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Other trials for Secondary HyperparathyroidismStudies of the same condition, open and under way.
- More trials run by Montefiore Medical CenterThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
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 1/2
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 4 participants (actual)
Sponsor and investigators
- Lead sponsor
- Montefiore Medical Center
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Maria Coco, Montefiore Medical Center
- Investigators
- Maria Coco, MD, MS, Principal investigator, Montefiore Medical Center
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00415584
- Sponsor's protocol ID
- 05-09-244
- Status last verified
- Apr 2025
- First submitted
- 21 Dec 2006
- Last updated
- 29 Apr 2025
- Results posted
- Yes, on ClinicalTrials.gov
- FDA-regulated drug
- Yes
Study at a glance
From the registry record, last updated by the sponsor on 29 Apr 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Cinacalcet for Treatment of Persistent Secondary Hyperparathyroidism in Renal Transplant Recipients: Effect on Renal Function, Serum Calcium and Bone Histomorphometry
- ClinicalTrials.gov ID
- NCT00415584
- Acronym / sponsor ID
- 05-09-244
- Conditions
- Secondary Hyperparathyroidism, Hypercalcemia
- Keywords
- hypercalcemia, transplant
- Phase
- Phase 1/2
- Study type
- Interventional
- Recruitment status
- TerminatedReason stopped: Based on information in IRB archives the study was terminated in 2009 due to low enrollment
- Enrolment
- 4 participants (actual)
- Lead sponsor
- Montefiore Medical CenterUniversity, hospital or other
- Study start
- 9 Feb 2007 (actual)
- Primary completion
- Nov 2009 (actual)
- Study completion
- Nov 2009 (actual)
- First posted
- 25 Dec 2006 (estimated)
- Results
- Posted 29 Apr 2025
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Secondary hyperparathyroidism can persist following successful renal transplantation and can cause high blood calcium, kidney dysfunction or failure and excessive bone loss among other problems. If the condition does not resolve, surgery is frequently required to remove the parathyroid glands, with all the inherent risks of surgery. Cinacalcet, a medicine used to treat secondary hyperparathyroidism in patients with kidney disease, may be effective in treating this condition in renal transplant recipients. The investigator team will study the effect of cinacalcet on calcium, bone and renal function in a 6 month treatment protocol.
Detailed description
Secondary Hyperparathyroidism in the renal transplant recipient can cause abnormal bone and mineral metabolism, resulting in hypercalcemia that is detrimental to renal function, causing renal dysfunction and calcinosis. These patients often require parathyroidectomy to correct the hypercalcemia. Surgery is not without significant risk to the patient. Risks include vocal cord paralysis, protracted hypocalcemia, cardiac arrhythmias, muscle cramps. In addition, parathyroidectomy has been associated with subsequent renal impairment.
Cinacalcet is a calcimimetic agent that is very effective in the treatment of secondary hyperparathyroidism in patients with renal failure as well as in hypercalcemia of parathyroid cancer. There have been reports of short term Cinacalcet use in renal transplant recipients. Serum calcium was improved in these patients.
However, little is known about the effect of cinacalcet on bone activity and turnover. It is not known whether Cinacalcet causes low turnover bone activity with adynamic bone disease. It is known that low turnover bone disease in renal patients can by itself cause hypercalcemia as the bone becomes static and unable to respond to everyday calcium loads.
Studies have shown that adynamic bone can develop in renal transplant recipients under a variety of conditions. It is not known what effect, if any, cinacalcet has on the bone activity of renal transplant recipients with persistent secondary hyperparathyroidism.
The purpose of the study is to determine the effect of Cinacalcet on serum calcium, renal function and bone histology in renal transplant recipients.
This is a prospective, open-label study. Protocol procedures will include baseline and 6 month measurements of bone mineral density, bone biochemical parameters, glomerular filtration rate, anterior iliac crest bone biopsy. Subjects will start cinacalcet after the first biopsy. The medication will be titrated to normalize serum calcium. Medication will be supplied by the study. Serum electrolytes will be monitored as indicated.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Cinacalcet Hydrochloride (HCl) | Experimental | Drug: Cinacalcet HCl |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (3 listed)
- Renal transplant recipient at least 3 months post transplant
- Hypercalcemic, with serum calcium > 10.5 milliequivalents per liter (mEq/L)
- Persistent hyperparathyroidism, with inappropriately elevated parathyroid hormone (PTH)
Key exclusion criteria (3 listed)
- Allergic to Cinacalcet HCl, tetracycline
- Pregnant
- On medication that utilizes same liver system as Cinacalcet HCl
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Cinacalcet HCl | Drug | Cinacalcet Hydrochloride (HCl) |
Primary outcome
Normalization of Serum Calcium Levels
Time frame: Baseline to 6 Months
Serum calcium was to have been assessed by drawing venous blood samples for serum analysis. Normal blood calcium levels for adults range from approximately 8.5 to 10.4 mg/dL, but vary depending on laboratory reference ranges. Changes in serum calcium levels from baseline following treatment with Cinacalcet HCl were to have been summarized and evaluated using paired t-tests.
2 secondary outcomes
Changes in Renal Function
Time frame: Baseline to 6 Months
Changes in Bone Mineral Density
Time frame: Baseline to 6 Months
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 29 Apr 2025.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Maria Coco, MD, MS principal investigator
Montefiore Medical Center
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 1/2 study testing Cinacalcet HCl in people with Secondary Hyperparathyroidism and Hypercalcemia, run by Montefiore Medical Center at 1 site 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 3 inclusion and 3 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 29 Apr 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site 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. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this combined phase mean?
Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.
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?
Yes. Results are posted in the registry (first posted 29 Apr 2025). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
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?
Normalization of Serum Calcium Levels (time frame: Baseline to 6 Months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
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 29 Apr 2025; AzTrials last refreshed its copy on 8 Nov 2026.