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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT03663855
Other study ID # 18-00642
Secondary ID
Status Completed
Phase Phase 2
First received
Last updated
Start date November 1, 2018
Est. completion date September 10, 2019

Study information

Verified date November 2021
Source NYU Langone Health
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

The purpose of this study is to determine the minimum effective dose of the cysteine binding thiol drug (CBTD) Tiopronin on urine cystine capacity, which is a measure of cystine solubility in the urine, in patients with cystinuria to evaluate the effect of escalating doses of cystine binding thiol drugs on the cystine capacity of the urine. The overall goal will be to help guide therapy and ultimately minimize unnecessary side effects caused by larger dosages. Cystinuria is a rare genetic disease that can lead to significant morbidity in affected patients due to the recurrent nature of the disease. This study will follow the levels of urine cystine capacity in order to help guide treatment and to use lower than usually prescribed Tiopronin doses to decrease the potential side effects while maintaining therapeutic benefit. This will increase adherence with the medications by decreasing the burden of the large number of pills that need to be taken daily.


Recruitment information / eligibility

Status Completed
Enrollment 10
Est. completion date September 10, 2019
Est. primary completion date September 10, 2019
Accepts healthy volunteers No
Gender All
Age group 18 Years to 80 Years
Eligibility Inclusion Criteria: - Patients with a confirmed laboratory diagnosis of cystinuria who meet the following criteria: (1) stone analysis demonstrating cystine as a component, or (2) increased urinary cystine excretion (>250mg/24hrs in adults). - A medical regimen that includes Tiopronin. - Willing to use a medically accepted form of birth control, if female and of child bearing- potential - Ability to reliably urinate in a collection vessel and measure urine volume. - Ability to give informed consent. - Documentation of a stable complete blood count (CBC) and urinalysis (UA) in the six month period prior to the date of enrollment. - Enrollment in Rare Kidney Stone Consortium (RKSC) Protocol 6401 (Cystinuria Registry) Exclusion Criteria: - Women who are pregnant, breastfeeding, or trying to become pregnant - Patients with renal colic - Patients who are scheduled to undergo a surgical procedure - Inability to give informed consent

Study Design


Related Conditions & MeSH terms


Intervention

Drug:
Tiopronin
Phase 1: No medication, Phase 2: 500mg PO daily x 7 days (total 500mg), Phase 3: 500mg PO BID x 7 days (total 1g), Phase 4: 1g PO BID x 7 days (total 2g)

Locations

Country Name City State
United States New York University School of Medicine New York New York

Sponsors (1)

Lead Sponsor Collaborator
NYU Langone Health

Country where clinical trial is conducted

United States, 

Outcome

Type Measure Description Time frame Safety issue
Primary Change in Cystine Capacity From Baseline This measure reflects the ability of urine to take up more cystine Baseline; Day 7
See also
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Completed NCT02125721 - Effect of Increasing Doses of Cystine Binding Thiol Drugs on Cystine Capacity in Patients With Cystinuria Phase 4
Active, not recruiting NCT02910531 - Lipoic Acid Supplement for Cystine Stone Phase 2
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Completed NCT00381849 - Use of an Herbal Preparation to Prevent and Dissolve Kidney Stones Phase 1/Phase 2
Completed NCT03836144 - Effect of Urine Alkalinazation on Urinary Inflammatory Markers in Patients With Cystinuria