Treatment of Autonomous Hyperparathyroidism in Post Renal Transplant Recipients



Status:Completed
Conditions:Renal Impairment / Chronic Kidney Disease, Endocrine, Nephrology, Metabolic
Therapuetic Areas:Endocrinology, Nephrology / Urology, Pharmacology / Toxicology
Healthy:No
Age Range:18 - Any
Updated:10/19/2018
Start Date:December 3, 2009
End Date:April 16, 2013

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A Randomized, Double-blind, Placebo-controlled Study to Evaluate the Efficacy and Safety of Using Cinacalcet to Correct Hypercalcemia in Renal Transplant Recipients With Autonomous Hyperparathyroidism

Hyperparathyroidism (HPT) is common in people with a kidney transplant. Patients with HPT
often have high parathyroid hormone (PTH) levels and may have large parathyroid glands in the
neck. Patients with HPT can develop bone disease (osteodystrophy). This bone disease can
cause bone pain, fractures, and poor formation of red blood cells. Other problems from HPT
may include increases in blood levels of calcium (hypercalcemia) and low blood levels of
phosphorus (hypophosphatemia). The high calcium levels may cause calcium to deposit in body
tissues. Calcium deposits can cause arthritis (joint pain and swelling), muscle inflammation,
itching, gangrene (death of soft tissue), heart and lung problems or kidney transplant
dysfunction (worsening of kidney transplant function). The purpose of this study is to
evaluate the effects of cinacalcet (Sensipar/Mimpara) on high calcium levels in the blood in
patients with HPT after a kidney transplant.


Inclusion Criteria:

- Received a kidney transplant ≥ 9 weeks at time of Screening and ≤ 24 months before
first dose

- May be the first kidney transplant or a repeat kidney transplant.

- Subjects with a functional, stable kidney transplant, defined as MDRD estimated
glomerular filtration rate (eGFR) ≥ 30 mL/min/1.73 m² (chromic kidney disease stage 3
or better) at Screening.

- Men or women ≥ 18 years at the start of Screening (ie, time of informed consent).

- Corrected total serum calcium > 10.5 mg/dL (2.63 mmol/L), defined as the mean of 2
values in Screening period.

- iPTH > 100 pg/mL (10.6 pmol/L), during the Screening period (obtained at either Screen
1 or Screen 2).

Exclusion Criteria:

- Received cinacalcet therapy post-transplant for more than 14 days cumulatively
post-transplant. If cinacalcet therapy was received for a total of 14 days or less
post-transplant, there must be a 4-week washout before subject is eligible for
screening (Note: This does not exclude pre-transplant use of cinacalcet).

- Anticipated parathyroidectomy within 6 to12 months after Randomization.

- Ongoing therapy with bisphosphonates or use within 6 months prior to Screening.

- Ongoing use of 1,25-dihydroxyvitamin D3 (including other active vitamin D metabolites
or analogues) or use within 30 days prior to Screening.

- Ongoing use of calcium supplements or use within 30 days prior to Screening.

- Ongoing use of phosphate binders (calcium or non-calcium containing) or use within 30
days prior to Screening.

- Ongoing use of a thiazide diuretic.

- Subjects with a history of seizures who had a seizure within the 3 months prior to
Randomization, which required adjustments to the seizure medication.

- Acute Kidney Injury (AKI) or renal biopsy within 6 weeks prior to Screening, unless it
is an institutional protocol-driven biopsy.
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