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Study to Assess SLN124 in Patients With Polycythemia Vera (SLN)

Primary Purpose

Polycythemia Vera

Status
Recruiting
Phase
Phase 1
Locations
International
Study Type
Interventional
Intervention
SLN124
Placebo
Sponsored by
Silence Therapeutics plc
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional treatment trial for Polycythemia Vera focused on measuring PV

Eligibility Criteria

18 Years - undefined (Adult, Older Adult)All SexesDoes not accept healthy volunteers

Inclusion Criteria:

  • Male and female patients aged 18 years or older.
  • A confirmed diagnosis of PV according to the revised 2016 World Health Organization criteria:
  • Suitable phlebotomy history
  • Must agree to adhere to appropriate contraception requirements
  • Patients who are not receiving cytoreductive therapy must have been discontinued from any prior cytoreductive therapy for at least 24 weeks before dosing and have recovered from any adverse events due to cytoreductive therapy.
  • Patients receiving cytoreductive therapy with hydroxyurea, interferon, busulfan or ruxolitinib must have received a stable dose of cytoreductive therapy for at least 12 weeks before dosing and with no planned change in dose.
  • Patients must have had a dermatological examination within 6 months prior to screening.
  • Must have an Eastern Cooperative Oncology Group score of 0, 1, or 2.

Exclusion Criteria:

  • Drug intolerance:

    1. History of intolerance to oligonucleotides, or GalNAc, or any component of SLN124.
    2. History of intolerance to s.c. injections.
  • Clinically significant thrombosis (e.g., deep vein thrombosis or splenic vein thrombosis) within 12 weeks of screening.
  • History of major bleeding events and/or a requirement for blood transfusion therapy owing to bleeding in the last 6 months prior to screening.
  • Meets the criteria for post-PV myelofibrosis as defined by the International Working Group-Myeloproliferative Neoplasms Research and Treatment
  • Any investigational drug less than 6 weeks prior to the first dose of study drug or not recovered from effects of prior administration of any investigational agent.
  • Any investigational or marketed product using GalNAc targeting less than 48 weeks prior to administration of any investigational agent.
  • Clinically significant co-morbidities
  • Biochemical and hematological parameters:

    1. Biochemical evidence of significant liver disease during screening
    2. Hematological parameters at screening as follows: platelets 1,000,000/µL; or white blood cell (WBC) count > 25,000/µL; or peripheral blasts < 1%.

Sites / Locations

  • North Houston Cancer ClinicsRecruiting
  • Renovatio ClinicalRecruiting
  • Pindara Private Hospital
  • Ashford Cancer Centre ResearchRecruiting
  • Peter MacCallum Cancer Centre
  • Alfred Health
  • Linear Clinical Research
  • Hospital Sultanah Aminah
  • Hospital Tengku Ampuan Afzan
  • Hospital Umum Sarawak
  • Hospital Ampang
  • Hospital Sultanah Nur Zahirah

Arms of the Study

Arm 1

Arm 2

Arm 3

Arm Type

Experimental

Experimental

Placebo Comparator

Arm Label

Phase 1 open-label SLN124

Phase 2 Blinded SLN124

Phase 2 Blinded Placebo

Arm Description

SLN124 for subcutaneous (s.c.) injection

SLN124 for subcutaneous (s.c.) injection

Sodium chloride for s.c. injection

Outcomes

Primary Outcome Measures

Incidence of treatment-emergent adverse events (AEs)
Safety and tolerability will be reported separately following open-label dose escalation phase and double-blind phase
Assessment of the number of phlebotomies at intervals

Secondary Outcome Measures

Pharmacokinetic: area under the plasma concentration (AUC)
Pharmacokinetic: peak plasma concentration (Cmax)
Pharmacodynamic: change in haematocrit
Pharmacodynamic: Change in Transferrin saturation (TSAT)
Pharmacodynamic: Change in Hepcidin

Full Information

First Posted
July 29, 2022
Last Updated
April 21, 2023
Sponsor
Silence Therapeutics plc
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1. Study Identification

Unique Protocol Identification Number
NCT05499013
Brief Title
Study to Assess SLN124 in Patients With Polycythemia Vera
Acronym
SLN
Official Title
Phase 1/2 Study With an Open-label Dose Escalation Phase Followed by a Randomized, Double-blind Phase of SLN124 in Patients With Polycythemia Vera
Study Type
Interventional

2. Study Status

Record Verification Date
January 2023
Overall Recruitment Status
Recruiting
Study Start Date
January 26, 2023 (Actual)
Primary Completion Date
December 2024 (Anticipated)
Study Completion Date
June 2025 (Anticipated)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Sponsor
Name of the Sponsor
Silence Therapeutics plc

4. Oversight

Studies a U.S. FDA-regulated Drug Product
Yes
Studies a U.S. FDA-regulated Device Product
No
Data Monitoring Committee
Yes

5. Study Description

Brief Summary
This is a Phase 1/2, multicenter study with an open-label dose escalation followed by a randomized placebo controlled and double-blind phase of SLN124 in adult patients with Polycythemia Vera (PV) to assess the safety, tolerability, efficacy, pharmacokinetic (PK), and Pharmacodynamic (PD) response of SLN124.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Polycythemia Vera
Keywords
PV

7. Study Design

Primary Purpose
Treatment
Study Phase
Phase 1, Phase 2
Interventional Study Model
Parallel Assignment
Model Description
Phase 1 is an open-label, dose-finding study. Phase 2 is a randomized, double-blind, placebo-controlled study.
Masking
ParticipantCare ProviderInvestigatorOutcomes Assessor
Allocation
Randomized
Enrollment
65 (Anticipated)

8. Arms, Groups, and Interventions

Arm Title
Phase 1 open-label SLN124
Arm Type
Experimental
Arm Description
SLN124 for subcutaneous (s.c.) injection
Arm Title
Phase 2 Blinded SLN124
Arm Type
Experimental
Arm Description
SLN124 for subcutaneous (s.c.) injection
Arm Title
Phase 2 Blinded Placebo
Arm Type
Placebo Comparator
Arm Description
Sodium chloride for s.c. injection
Intervention Type
Drug
Intervention Name(s)
SLN124
Intervention Description
SLN124 is a double-stranded small interfering ribonucleic acid (siRNA) targeting transmembrane protease, serine 6 (TMPRSS6) messenger ribonucleic acid (mRNA).
Intervention Type
Drug
Intervention Name(s)
Placebo
Intervention Description
sodium chloride, solution for injection
Primary Outcome Measure Information:
Title
Incidence of treatment-emergent adverse events (AEs)
Description
Safety and tolerability will be reported separately following open-label dose escalation phase and double-blind phase
Time Frame
Day 239
Title
Assessment of the number of phlebotomies at intervals
Time Frame
6 months prior to dosing to Day 239
Secondary Outcome Measure Information:
Title
Pharmacokinetic: area under the plasma concentration (AUC)
Time Frame
Day 127
Title
Pharmacokinetic: peak plasma concentration (Cmax)
Time Frame
Day 127
Title
Pharmacodynamic: change in haematocrit
Time Frame
Day 1 to Day 239
Title
Pharmacodynamic: Change in Transferrin saturation (TSAT)
Time Frame
Day 1 to Day 239
Title
Pharmacodynamic: Change in Hepcidin
Time Frame
Day 1 to Day 239

10. Eligibility

Sex
All
Minimum Age & Unit of Time
18 Years
Accepts Healthy Volunteers
No
Eligibility Criteria
Inclusion Criteria: Male and female patients aged 18 years or older. A confirmed diagnosis of PV according to the revised 2016 World Health Organization criteria: Suitable phlebotomy history Must agree to adhere to appropriate contraception requirements Patients who are not receiving cytoreductive therapy must have been discontinued from any prior cytoreductive therapy for at least 24 weeks before dosing and have recovered from any adverse events due to cytoreductive therapy. Patients receiving cytoreductive therapy with hydroxyurea, interferon, busulfan or ruxolitinib must have received a stable dose of cytoreductive therapy for at least 12 weeks before dosing and with no planned change in dose. Patients must have had a dermatological examination within 6 months prior to screening. Must have an Eastern Cooperative Oncology Group score of 0, 1, or 2. Exclusion Criteria: Drug intolerance: History of intolerance to oligonucleotides, or GalNAc, or any component of SLN124. History of intolerance to s.c. injections. Clinically significant thrombosis (e.g., deep vein thrombosis or splenic vein thrombosis) within 12 weeks of screening. History of major bleeding events and/or a requirement for blood transfusion therapy owing to bleeding in the last 6 months prior to screening. Meets the criteria for post-PV myelofibrosis as defined by the International Working Group-Myeloproliferative Neoplasms Research and Treatment Any investigational drug less than 6 weeks prior to the first dose of study drug or not recovered from effects of prior administration of any investigational agent. Any investigational or marketed product using GalNAc targeting less than 48 weeks prior to administration of any investigational agent. Clinically significant co-morbidities Biochemical and hematological parameters: Biochemical evidence of significant liver disease during screening Hematological parameters at screening as follows: platelets 1,000,000/µL; or white blood cell (WBC) count > 25,000/µL; or peripheral blasts < 1%.
Central Contact Person:
First Name & Middle Initial & Last Name or Official Title & Degree
Silence Therapeutics Patient Information
Phone
+44 (0) 20 3457 6900
Email
patient-info@silence-therapeutics.com
Facility Information:
Facility Name
North Houston Cancer Clinics
City
Huntsville
State/Province
Texas
ZIP/Postal Code
77340
Country
United States
Individual Site Status
Recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Elham Abassi
Facility Name
Renovatio Clinical
City
The Woodlands
State/Province
Texas
ZIP/Postal Code
77380
Country
United States
Individual Site Status
Recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Alain Sayegh
Facility Name
Pindara Private Hospital
City
Benowa
State/Province
Queensland
ZIP/Postal Code
4217
Country
Australia
Individual Site Status
Not yet recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Hanlon Sia, Dr
Facility Name
Ashford Cancer Centre Research
City
Kurralta Park
State/Province
South Australia
ZIP/Postal Code
5037
Country
Australia
Individual Site Status
Recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Nicholas Wickham, Dr
Facility Name
Peter MacCallum Cancer Centre
City
Melbourne
State/Province
Victoria
ZIP/Postal Code
3000
Country
Australia
Individual Site Status
Not yet recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Kate Burbury, Prof
Facility Name
Alfred Health
City
Melbourne
State/Province
Victoria
ZIP/Postal Code
3004
Country
Australia
Individual Site Status
Not yet recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Andrew Perkins, Prof
Facility Name
Linear Clinical Research
City
Nedlands
State/Province
Western Australia
ZIP/Postal Code
6009
Country
Australia
Individual Site Status
Not yet recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Carolyn Grove, Dr
Facility Name
Hospital Sultanah Aminah
City
Johor Bahru
State/Province
Johor
ZIP/Postal Code
80100
Country
Malaysia
Individual Site Status
Not yet recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Azizan Sharif, Dr
Facility Name
Hospital Tengku Ampuan Afzan
City
Kuantan
State/Province
Pahang
ZIP/Postal Code
25100
Country
Malaysia
Individual Site Status
Not yet recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Ahlam Naila Kori, Dr
Email
ahlamnaila@gmail.com
First Name & Middle Initial & Last Name & Degree
Normala Binti Nordin, Dr
Email
normalanordin80@gmail.com
First Name & Middle Initial & Last Name & Degree
Ahlam Naila Kori, Dr
Facility Name
Hospital Umum Sarawak
City
Kuching
State/Province
Sarawak
ZIP/Postal Code
93586
Country
Malaysia
Individual Site Status
Not yet recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Chew Lee Ping, Dr
Email
leepingc@gmail.com.my
First Name & Middle Initial & Last Name & Degree
Tiong Xun Ting, Dr
Email
tiongxt@gmail.com
First Name & Middle Initial & Last Name & Degree
Chew Lee Ping, Dr
Facility Name
Hospital Ampang
City
Ampang
State/Province
Selangor
ZIP/Postal Code
68000
Country
Malaysia
Individual Site Status
Not yet recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Veena Selvaratnam, Dr
Facility Name
Hospital Sultanah Nur Zahirah
City
Kuala Terengganu
State/Province
Terengganu
ZIP/Postal Code
20400
Country
Malaysia
Individual Site Status
Not yet recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Ganesh A/L Kasinathan, Dr
Email
ganeshkasinathan11@hotmail.com
First Name & Middle Initial & Last Name & Degree
Nur Aina Binti Abdul Rohim
Email
nur.aina@clinicalresearch.my
First Name & Middle Initial & Last Name & Degree
Ganesh Kasinathan, Dr

12. IPD Sharing Statement

Learn more about this trial

Study to Assess SLN124 in Patients With Polycythemia Vera

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