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PIK3CA-Related Overgrowth Spectrum (PROS)/Proteus SyndromePhase 1/2MOSAICNCT03094832

Study of Miransertib (MK-7075) in Participants With PIK3CA-related Overgrowth Spectrum and Proteus Syndrome (MOSAIC) (MK-7075-002)

A Phase 1/2 study testing Miransertib in people with PIK3CA-Related Overgrowth Spectrum (PROS)/Proteus Syndrome, run by ArQule, Inc., a subsidiary of Merck Sharp & Dohme LLC, a subsidiary of Merck & Co., Inc. (Rahway, NJ USA) at 11 sites in 4 countries.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Official record
Search all trials

Trial summary

This is an open label, Phase 1/2 study of oral miransertib (MK-7075) administered to participants at least 2 years of age with phosphatidylinositol-4,5-bisphosphate 3-kinase, catalytic subunit alpha (PIK3CA)-related Overgrowth Spectrum (PROS) and Proteus Syndrome (PS) (MOSAIC). Read more about this study

Who is it for?
Ages 2 years and older
What is being tested?
Miransertib
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
50 participants
Where
11 sitesin 4 countries
Study dates
16 May 2017to 11 Apr 2022
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 2 years and older
  • All sexes
  • No healthy volunteers
  • Child, Adult, Older adult

Who may be able to join

  • Part A
  • Signed informed consent and, when applicable, signed assent
  • Male or female participants ≥ 2 years old with body surface area (BSA) of ≥ 0.33 m^2
  • Have a clinical diagnosis of PROS or PS with documented somatic PIK3CA or serine-threonine protein kinase (AKT1) mutations
  • Archival or fresh overgrowth tissue sample available to be shipped to Sponsor or designee
  • Have poor prognosis, significant morbidity, and/or progressive disease (e.g., worsening of the disease/increase in number or size of the overgrowth lesions in the last 12 months)
Show all 27Show fewer
  • Have measurable disease (at least one overgrowth lesion that can be accurately measured in size by imaging and/or linear or circumference measure)
  • Adequate organ function based on screening laboratory values
  • If a female is of child-bearing potential, documentation of a negative pregnancy test is required prior to enrollment. Sexually active participants (male and female) must agree to use double-barrier contraceptive measures, oral contraception, or avoidance of intercourse while on study and for up to 90 days after ending treatment
  • Ability to complete the Quality of Life (QoL) questionnaires by the participant or his/her caregiver
  • Part B:
  • Signed consent form and when applicable, signed assent
  • Archival or fresh overgrowth tissue sample available to be shipped to Sponsor or designee
  • Except for Cohort 4, clinically progressive or worsening disease defined as an increase in number or size of the overgrowth lesion(s) in the last 6 months as assessed by the Investigator
  • Adequate organ function based on screening laboratory values
  • Male or female participants of child-producing potential must agree to use double-barrier contraceptive measures, oral contraception, or avoidance of intercourse during the study and for 90 days after the last dose of miransertib
  • Ability to complete the study questionnaires by the participant or his/her caregiver
  • Cohort 1 (PROS) specific criteria
  • Male or female participants ≥ 2 years and ≤30 years of age with BSA of ≥ 0.33 m2
  • Have clinical diagnosis of PROS per Diagnostic Criteria for PROS and documented somatic PIK3CA variant
  • Have at least one lesion that can be measured by study- standardized volumetric MRI (eligibility to be confirmed by blinded independent central imaging review
  • Cohort 2 (PS) specific criteria
  • Male or female participants ≥ 2 years and ≤18 years of age with BSA of ≥ 0.33 m2
  • Have clinical diagnosis of PS per Diagnostic Criteria for PS and documented somatic AKT1 variant
  • Have at least one plantar cerebriform connective tissue nevus (CCTN) and pre-CCTN lesion that can be measured by standardized photography
  • Cohort 3 specific criteria: Male or female participants ≥2 years old with BSA of ≥ 0.33 m2 and who fail to meet the eligibility criteria for Cohorts 1 or 2
  • Cohort 4 (PROS or PS) specific criteria: participants previously treated with miransertib or currently receiving miransertib under Compassionate Use/Expanded Access. Participants should meet the age criterion by/on the date of the first dose, Cycle 1 Day 1

Who cannot join

  • Part A:
  • History of Type 1 or 2 uncontrolled diabetes mellitus requiring regular medication (other than metformin or other oral hypoglycemic agents) or fasting glucose ≥ 160 mg/dL (if > 12 years old) and ≥ 180 mg/dL (if ≤ 12 years old) at the screening visit
  • History of significant cardiac disorders:
  • Myocardial infarction (MI) or congestive heart failure defined as Class II-IV per the New York Heart Association (NYHA) classification within 6 months of the first dose of miransertib (MI occurring > 6 months of the first dose of miransertib will be permitted)
  • Grade 2 (per NCI CTCAE version 4.03) or worse conduction defect (e.g., right or left bundle branch block); left ventricular ejection fraction (LVEF) < 50% assessed by echocardiogram/multigated acquisition (MUGA) scan
  • Major surgery, radiotherapy, or immunotherapy within four weeks of the first dose of miransertib
Show all 22Show fewer
  • Any experimental systemic therapy for the purpose of treating PROS or PS (e.g., sirolimus, everolimus, high dose steroids) within two weeks of the first dose of miransertib, except for participants who were previously or are currently treated with miransertib under a Compassionate Use/Expanded Access program
  • Intolerance of or severe toxicity attributed to v-Akt murine thymoma viral oncogene homolog (AKT) inhibitors (e.g., miransertib, uprosertib, afuresertib, ipatasertib)
  • Concurrent severe uncontrolled illness not related to PROS or PS (ongoing or active infection, known human immunodeficiency virus (HIV) infection, malabsorption syndrome, psychiatric illness/substance abuse/social situation that would limit compliance with study requirements)
  • Pregnant or breastfeeding
  • Inability to comply with study evaluations or to follow drug administration guidelines
  • Part B
  • History of Type 1 diabetes mellitus or Type 2 uncontrolled diabetes mellitus requiring regular medication (other than metformin or other oral hypoglycemic agents) or fasting glucose ≥ 160 mg/dL (if > 12 years old) and ≥ 180 mg/dL (if ≤ 12 years old) at the screening visit
  • History of significant cardiac disorders:
  • Myocardial infarction (MI) or congestive heart failure defined as Class II-IV per the New York Heart Association (NYHA) classification within 6 months of the first dose of miransertib (MI occurring > 6 months of the first dose of miransertib will be permitted)
  • Grade 2 (per current version of National Cancer Institute [NCI] Common Terminology Criteria for Adverse Events [CTCAE]) or worse conduction defect (e.g., right or left bundle branch block)
  • Major surgery or locoregional therapy within four weeks of the first dose of miransertib
  • Any experimental systemic therapy for the purposes of treating PROS or PS (e.g., sirolimus, everolimus, high dose steroids) within two weeks of the first dose of miransertib
  • Intolerance of or severe toxicity attributed to AKT inhibitors (e.g., miransertib, uprosertib, afuresertib, ipatasertib)
  • Concurrent severe uncontrolled illness not related to PROS or PS (e.g. ongoing or active infection, known HIV infection, malabsorption syndrome, psychiatric illness/substance abuse/social situation that would limit compliance with study requirements)
  • Pregnant or breastfeeding
  • Inability to comply with study evaluations or to follow drug administration guidelines

Trial locations and contacts

11 sites in 4 countries.

11 sites in 4 countries

United States6 sites
  • Children's Hospital of Atlanta ( Site 0107)

    Atlanta, Georgia, 30342

  • Boston Children's Hospital ( Site 0089)

    Boston, Massachusetts, 02115

  • Ann & Robert H. Lurie Children's Hospital of Chicago ( Site 0101)

    Chicago, Illinois, 60611

  • Cincinnati Children's Hospital Medical Center ( Site 0102)

    Cincinnati, Ohio, 45229

  • Texas Children's Hospital ( Site 0104)

    Houston, Texas, 77030

  • Seattle Childrens Hospital ( Site 0103)

    Seattle, Washington, 98105

Other trials in United States

Italy3 sites
  • Universita di Catania ( Site 0088)

    Catania, 95123

  • Fondazione Policlinico Universitario A. Gemelli ( Site 0052)

    Roma, 00168

  • Ospedale Pediatrico Bambino Gesu ( Site 0087)

    Rome, Roma, 00165

Other trials in Italy

Australia1 site
  • Hunter Genetics ( Site 0201)

    Waratah NSW, New South Wales, 2298

Other trials in Australia

Spain1 site
  • Hospital Sant Joan ( Site 0601)

    Esplugues de Llobregat, Barcelona, 08950

Other trials in Spain

About this study

Official title: A Phase 1/2 Study of ARQ 092 (Miransertib) in Subjects With PIK3CA-related Overgrowth Spectrum and Proteus Syndrome

This is an open label, Phase 1/2 study of oral miransertib (MK-7075) administered to participants at least 2 years of age with phosphatidylinositol-4,5-bisphosphate 3-kinase, catalytic subunit alpha (PIK3CA)-related Overgrowth Spectrum (PROS) and Proteus Syndrome (PS) (MOSAIC).

Read the detailed description

The study consists of two parts: Part A and Part B. Part A was closed to enrollment under Amendment 6. As of Amendment 7, the endpoints for Part A and Part B have been combined to assess the safety and tolerability of miransertib in participants with PROS and PS. Previous efficacy and pharmacokinetic (PK) objectives and endpoints have been removed. Amendment 7 will complete the final enrollment into the MOSAIC study and Compassionate Use/Expanded Access Program.

Being tested
Miransertib
Keywords
ARQ 092, ArQule, AKT, PIK3CA, Overgrowth, Congenital malformations, Miransertib, MOSAIC
Medical subject headings
Hereditary Sensory and Autonomic Neuropathies, Congenital Abnormalities

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • MiransertibDrug

    Also called MK-7075, ARQ 092

    Miransertib capsules administered orally at an initial dose of 15 mg/m^2 or 25 mg/m^2 QD and then titrated up to 25 mg/m^2 or 35 mg/m^2 QD at the investigator's discretion.

Study groups in NCT03094832
Study groupRoleWhat they receive
Part A: Miransertib PROS/PSExperimentalDuring Cycles 1-3, participants with either PROS (phosphatidylinositol- 4,5-bisphosphate 3-kinase, catalytic subunit alpha [PIK3CA]-related Overgrowth Spectrum) or PS (Proteus syndrome) received miransertib 15 mg/m^2 once daily (QD) (each cycle length = 28 days). From Cycles 4-48 or until disease progression, unacceptable toxicity, or discontinuation, participants received miransertib dose titrated to 25 mg/m^2 and then titrated to 35 mg/m^2 orally QD at the investigator's discretion.
Receives: Drug: Miransertib
Part B: Miransertib PROS (Cohort 1)ExperimentalDuring Cycles 1-3, participants with PROS who have a measurable lesion by volumetric magnetic resonance imaging (MRI) received miransertib 15 mg/m^2 QD (each cycle length = 28 days). From cycles 4-48 or until disease progression, unacceptable toxicity, or discontinuation, participants received miransertib dose titrated to 25 mg/m^2 orally QD at the investigator's discretion.
Receives: Drug: Miransertib
Part B: Miransertib PS (Cohort 2)ExperimentalDuring Cycles 1-3, participants with PS who have a measurable lesion by standardized digital photography received miransertib 15 mg/m^2 QD (each cycle length = 28 days). From cycles 4-48 or until disease progression, unacceptable toxicity, or discontinuation, participants received miransertib dose titrated to 25 mg/m^2 orally QD at the investigator's discretion.
Receives: Drug: Miransertib
Part B: Miransertib PROS/PS (Cohort 3)ExperimentalDuring Cycles 1-3, participants with PROS or PS who do not meet all the eligibility criteria for Cohorts 1 or 2 received miransertib 15 mg/m^2 QD (each cycle length = 28 days). From cycles 4-48 or until disease progression, unacceptable toxicity, or discontinuation, participants received miransertib dose titrated to 25 mg/m^2 orally QD at the investigator's discretion.
Receives: Drug: Miransertib
Part B: Miransertib Compassionate Use/Expanded Access (Cohort 4)ExperimentalDuring cycles 1-48 (each cycle length = 28 days) or until disease progression, unacceptable toxicity, or discontinuation, participants previously treated with miransertib or currently receiving miransertib under Compassionate Use/Expanded Access continued to receive the current dose of miransertib (did not exceed 25 mg/m^2).
Receives: Drug: Miransertib

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Number of Participants Who Experienced an Adverse Event (AE)

    An AE was defined as any untoward medical occurrence associated with the use of a drug in a participant, whether or not considered drug related. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding, for example), symptom, or disease temporally associated with the use of a medicinal product and does not imply any judgment about causality.

    Measured: Up to approximately 48 months

  2. Number of Participants Who Discontinued Study Treatment Due to an AE

    An AE was defined as any untoward medical occurrence associated with the use of a drug in a participant, whether or not considered drug related. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding, for example), symptom, or disease temporally associated with the use of a medicinal product and does not imply any judgment about causality.

    Measured: Up to approximately 45 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted29 Mar 2017
  2. Study start16 May 2017
  3. Primary completion11 Apr 2022
  4. Study completion11 Apr 2022

Why it stopped: Early termination due to business reasons

Resources

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
Non-randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
50 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03094832
Sponsor's protocol ID
7075-002
Other IDs
MOSAIC, ARQ 092-103, MK-7075-002, 2016-000558-37, 2016
Acronym
MOSAIC
Status last verified
Apr 2023
First submitted
17 Mar 2017
Last updated
13 Apr 2023
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
Yes: http://engagezone.msd.com/doc/ProcedureAccessClinicalTrialData.pdf
Expanded access
Available

Publications

  • Eng W, Iacobas I, Perkins J, Zampino G, Leoni C, Buonuomo PS, Simonetti A, Goel H, Briones M, Huang M, Goldmacher G, Liaw D, Hammill A. Safety findings from the phase 1/2 MOSAIC study of miransertib for patients with PIK3CA-related overgrowth spectrum or Proteus syndrome. Orphanet J Rare Dis. 2025 Jul 25;20(1):375. doi: 10.1186/s13023-025-03831-z.

    PubMed 40713644
  • Forde K, Resta N, Ranieri C, Rea D, Kubassova O, Hinton M, Andrews KA, Semple R, Irvine AD, Dvorakova V. Clinical experience with the AKT1 inhibitor miransertib in two children with PIK3CA-related overgrowth syndrome. Orphanet J Rare Dis. 2021 Feb 27;16(1):109. doi: 10.1186/s13023-021-01745-0.

    PubMed 33639990

Questions about this trial

What is this clinical trial studying?

A Phase 1/2 study testing Miransertib in people with PIK3CA-Related Overgrowth Spectrum (PROS)/Proteus Syndrome, run by ArQule, Inc., a subsidiary of Merck Sharp & Dohme LLC, a subsidiary of Merck & Co., Inc. (Rahway, NJ USA) at 11 sites in 4 countries.

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 27 inclusion and 22 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 13 Apr 2023. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 11 sites in United States, Italy, Australia, Spain. 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 31 Mar 2023). 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?

Number of Participants Who Experienced an Adverse Event (AE) (time frame: Up to approximately 48 months). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT03094832, which also lists 2 linked publications.

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 13 Apr 2023.

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