Ended Therapeutic confirmatory (Phase III) ESKD participants with history of secondary hyperparathyroidism (SHPT) undergoing maintenance hemodialysis

A study to see how well PLS240 works in treating secondary hyperparathyroidism, and how safe it is, in end stage kidney disease participants who are on hemodialysis (PATH-1)

EU CTIS ID: 2023-504338-24-00

What this study is testing

Double-blind phase: To assess the efficacy of PLS240 compared to placebo in reducing iPTH by ≥30% in participants with SHPT undergoing chronic hemodialysis. Open-Label phase: To assess the long-term safety of PLS240 in participants who have completed the safety follow-up visit of the Double-Blind Phase.

  • Therapeutic confirmatory (Phase III)

A plain-language read of the study's public EU CTIS listing. The study team confirms the details.

Who can take part

You may be able to join if

  • Aged 18 - 80 years at time of informed consent.
  • Pre-dialysis central laboratory iPTH must be ≥400 pg/mL on at least two assessments performed at 2 visits, at least 1 week apart, during the Active Screening period. iPTH may be tested up to 4 times during the Active Screening period.
  • Voluntarily given written informed consent to participate in this study
  • Agrees to not participate in another study of an investigational agent during the study
  • To be eligible for inclusion into the Open-Label Extension Phase of the study, participants must fulfill the additional following criteria at the time of entry into the Open-Label Extension Phase: Have successfully completed the course of treatment and final safety follow-up visit of the Double-Blind Phase
  • Voluntarily given written informed consent to participate in the Open-Label Extension Phase of the study

You likely can't join if

  • 1. Diagnosis of primary hyperparathyroidism
  • 17. Poorly controlled diabetes mellitus, in the judgment of the investigator or sub-investigator
  • 18. Poorly controlled hypertension (defined as post-dialysis [seated if available] systolic pressure >180 mmHg and/or diastolic pressure >110 mmHg) at 2 or more dialysis sessions during the 2 weeks prior to signing the ICF
  • 2.Pre-dialysis central laboratory Active Screening iPTH >1500 pg/mL on two or more occasions. iPTH may be tested up to 4 times during the Active Screening period.
  • 19. Enrolled in other invasive investigational device or investigational drug trials, within at least 30 days prior to signing the ICF or are receiving other investigational agents (experimental dialysis machines are acceptable)
  • 20. History of symptomatic ventricular dysrhythmias or Torsade de Pointes.
See the full eligibility criteria
Who can join
  • Aged 18 - 80 years at time of informed consent.
  • Pre-dialysis central laboratory iPTH must be ≥400 pg/mL on at least two assessments performed at 2 visits, at least 1 week apart, during the Active Screening period. iPTH may be tested up to 4 times during the Active Screening period.
  • Voluntarily given written informed consent to participate in this study
  • Agrees to not participate in another study of an investigational agent during the study
  • To be eligible for inclusion into the Open-Label Extension Phase of the study, participants must fulfill the additional following criteria at the time of entry into the Open-Label Extension Phase: Have successfully completed the course of treatment and final safety follow-up visit of the Double-Blind Phase
  • Voluntarily given written informed consent to participate in the Open-Label Extension Phase of the study
  • Prescribed hemodialysis for 3 times per week
  • Continue to meet Inclusion Criteria 9, 10, and 12
  • Prescribed hemodialysis for 3 times per week and on therapy for at least 3 months and has a delivered Kt/V≥1.2 within 4 weeks prior to signing the ICF.
  • Pre-dialysis central laboratory screening iPTH must be ≥450 pg/mL on two measurements performed at 2 visits at least 1 week apart. Only one (1) repeat iPTH is allowed and must be performed at least a week after the previous iPTH.
  • Pre-dialysis central laboratory cCa must be ≥8.3 mg/dL on at least one assessment performed during the Active Screening period. cCa may be tested up to 3 times during the Active Screening period. 5.Dialysate calcium concentration ≥2.5 mEq/L (1.25 mmol/L) and stable for at least 4 weeks prior to signing the ICF.
  • Dialysate calcium concentration ≥2.5 mEq/L (1.25 mmol/L) and stable for at least 4 weeks prior to signing the ICF.
  • Participants receiving active Vitamin D sterols (e.g., doxercalciferol or calcitriol) to manage SHPT must be on a stable dose (e.g., maximum dose change ≤50%), in the opinion of the investigator or sub-investigator, within the 2 months prior to signing the ICF, remain stable, as defined as no increase in dose, through the screening period, and be expected to maintain a stable dose, as defined as no increase in dose, for the duration of the study.
  • Participants receiving phosphate binders must be on a stable dose (e.g., maximum dose change ≤50%), in the opinion of the investigator or sub-investigator, within the 2 months prior to signing the ICF, remain stable through the screening period, and be expected to maintain stable dose for the duration of the study.
  • Participants receiving calcium supplements must be on a stable dose (e.g., maximum dose change ≤50%), in the opinion of the investigator or sub-investigator, within the 2 months prior to signing the ICF and remain stable through the screening period.
  • Female participants who are post-menopausal (‘post-menopausal’ women have had no menses for the previous year and are over the age of 50 years), or surgically sterilized, or have a medical condition that prevents pregnancy, or commit to remain abstinent during the study and for 2 weeks after the last dose of the investigational product (IP), or are willing to use highly effective contraception (see Section 8.8) during the study and for 2 weeks after the last dose of IP. Women of child-bearing potential must have a negative serum pregnancy test during the screening period. 10.Male participants who are willing to use highly effective contraception (see Section 8.8) when sexually active and will not donate sperm during the treatment phase and for 2 weeks after the last dose of IP.
What rules you out
  • 1. Diagnosis of primary hyperparathyroidism
  • 17. Poorly controlled diabetes mellitus, in the judgment of the investigator or sub-investigator
  • 18. Poorly controlled hypertension (defined as post-dialysis [seated if available] systolic pressure >180 mmHg and/or diastolic pressure >110 mmHg) at 2 or more dialysis sessions during the 2 weeks prior to signing the ICF
  • 2.Pre-dialysis central laboratory Active Screening iPTH >1500 pg/mL on two or more occasions. iPTH may be tested up to 4 times during the Active Screening period.
  • 19. Enrolled in other invasive investigational device or investigational drug trials, within at least 30 days prior to signing the ICF or are receiving other investigational agents (experimental dialysis machines are acceptable)
  • 20. History of symptomatic ventricular dysrhythmias or Torsade de Pointes.
  • 21. History of or family history of long QT syndrome
  • 22. QTcF >500msec on screening ECG
  • 23. Pregnant or breast feeding
  • 24. Prior exposure or hypersensitivity to PLS240 or any of its components
  • 25. Current, recent, or suspected infection with SARS-CoV-2/COVID-19 within 4 weeks prior to signing the ICF
  • 9. Clinically significant abnormalities on screening laboratory tests (may repeat abnormal laboratory tests as defined in Ssection 7.4.1) according to the Investigator including but not limited to the following: a. Serum albumin ≤3.0 g/dL b. Serum magnesium <1.5 mg/dL c. Serum P >8.0 mg/dL d. Hemoglobin <8.5 g/dL e. Platelet count <100,000 x106/L f. Serum transaminase (alanine transaminase [ALT] or Serum glutamic pyruvic transaminase [SGPT], aspartate aminotransferase [AST] or serum glutamic oxaloacetic transaminase [SGOT]) ≥ 2.5 times the upper limit of normal (ULN) during Active Screening
  • 26. In the opinion of the investigator any disorder that would interfere with understanding and giving informed consent, or compliance with protocol requirements
  • 27. Participants must be excluded from the Open-Label Extension Phase of the study, in case of the following at the time of entry into the Open-Label Extension Phase: In the opinion of the investigator continuation into the Open-Label Extension Phase is not considered safe and/or feasible
  • 28. Continues to meet Exclusion Criterion #5
  • 3. History of parathyroid intervention including parathyroidectomy (PTx) and/or percutaneous ethanol injection therapy (PEIT) within 26 weeks before signing the ICF.
  • 4. Treatment with any prohibited medication as defined in protocol Section 8.3.1.
  • 5. Anticipated or scheduled parathyroidectomy during the study period.
  • 6. Planned living-related or living-unrelated kidney transplant during the study period.
  • 7. Change in mode of dialysis (e.g., from hemodialysis to hemodiafiltration, peritoneal dialysis to hemodialysis, at home to in center dialysis), dialysate Ca concentration, or prescribed dialysis treatment time within 4 weeks before signing the ICF
  • 8. Noncompliant with hemodialysis (i.e., missing more than 3 dialysis sessions within 8 weeks prior to signing the ICF, unless absence is due to hospitalization)
  • 10. Diagnosed with an unstable medical condition, defined as having been hospitalized, other than for dialysis vascular access intervention, within 30 days prior to signing the ICF or otherwise unstable in the judgment of the investigator
  • 11. History of malignancy within the last 2 years prior to signing the ICF (except squamous or basal cell skin cancers, or cervical carcinoma in situ).
  • 12. Recent history (within 4 weeks prior to signing the ICF) of angina pectoris with symptoms that occur at rest or minimal activity. Chest pain on dialysis (within 8 weeks prior to signing the ICF) unless evaluated by a cardiologist with documentation that the chest pain is not due to cardiac ischemia
  • 13. History of New York Heart Association (NYHA) Functional Class 3 or 4 heart failure (see Appendix 2)
  • 14. History of myocardial infarction, coronary angioplasty, or coronary arterial bypass grafting within the past 4 months prior to signing the ICF.
  • 15. Stroke (cerebral infarction or cerebral hemorrhage) within 6 months prior to signing the ICF
  • 16. Participant is receiving treatment for a seizure disorder or has a history of a seizure within 12 weeks prior signing the ICF

The study team makes the final eligibility decision.

Where it's taking place

  • United States
  • Serbia

Questions & answers

Do participants get paid in this trial?

This listing doesn't specify compensation. Many trials still reimburse travel or offer a stipend, so it's worth asking the study team when you connect.

Is it free to join, and do I need insurance?

Searching and applying through BridgeMD is free. In clinical trials the study-related treatment and visits are generally provided at no cost to you. You usually don't need insurance to take part - confirm specifics with the study team.

How long does this study last?

The listing doesn't state an exact length. The study team walks you through the schedule and number of visits before you decide to enroll.

Who can join this trial?

This study is enrolling all sexes, 18-64 years, 65+ years. The study team makes the final eligibility decision.

Where is this trial taking place?

Study sites include United States; Serbia. Enter your location above to see the nearest site and check your eligibility.

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BridgeMD is an information and trial-matching tool - not medical advice, and not the study sponsor. Details come from EU CTIS; the study team decides eligibility.