AzTrials
AzTrials

Castleman DiseasePhase 2NCT03933904

Sirolimus in Previously Treated Idiopathic Multicentric Castleman Disease

A Phase 2 study testing Sirolimus in people with Castleman Disease and Castleman's Disease, Multicentric, run by University of Pennsylvania at 2 sites in United States.

Active, not recruiting

Under way, not looking for participants. Everyone needed has enrolled. The study is still running.

Official record
Search all trials

Trial summary

The purpose of this study is to understand the impact of sirolimus on idiopathic multicentric Castleman disease. Read more about this study

Who is it for?
Ages 2 to 80 years
What is being tested?
Sirolimus
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
7 participants
Where
2 sitesUnited States
Study dates
25 Sep 2019to 30 Jun 2027
Phase
Phase 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 to 80 years
  • All sexes
  • No healthy volunteers
  • Child, Adult, Older adult

Who may be able to join

  • Male or female, age 2-80
  • Documented disease history consistent with the diagnostic criteria for iMCD
  • Failed/refractory (patient did not achieve sufficient disease control with anti-IL-6 therapy, as determined by the site investigator), relapsed (return of symptoms while on therapy), or inability to tolerate anti-IL-6 or anti-IL-6 receptor therapy
  • Evidence of active disease, defined as at least two abnormalities in the criteria comprising the CBR criteria, including at least one objective measurement (hemoglobin, weight loss, or lymph node size)
  • Ability to consume oral medication in the form of a tablet
  • Ability to provide, or for a legally authorized representative to provide on their behalf, informed consent prior to any study-specific activities

Who cannot join

  • Subjects cannot be pregnant or nursing females
  • Except for anti-IL6 blockade therapy (siltuximab or tocilizumab), the last dose of which must be ≥ 14 days prior to enrollment (unless subjects cannot or are unwilling to undergo a 14 day washout period), subjects cannot have received any systemic therapy(ies) intended to treat iMCD other than corticosteroids within 28 days of enrollment
  • Subjects cannot have previously received sirolimus monotherapy to treat iMCD
  • Subjects cannot have any of the following: ECOG >3 (or Karnofsky/Lansky score ≤ 60 in children); Estimated glomerular filtration rate (eGFR) < 30 mL/min/1.73 m2 or creatinine > 3.0 mg/dL; Absolute neutrophil count (ANC) < 1000 x 109/L ((< 500 x 109/L in children); Hemoglobin ≤ 6.5 g/dL (transfusion independent, defined as not receiving a red blood cell transfusion for ≥ 7 days prior); Aspartate aminotransferase (AST) or alanine aminotransferase (ALT) laboratory values greater than three times the upper limit of normal; Albumin < 2 g/dL (transfusion independent, defined as not receiving intravenous albumin for ≥ 7 days prior); Platelet count ≤ 40 x 109/L (transfusion independent, defined as not receiving platelet transfusion for ≥ 7 days prior); Pulmonary involvement or interstitial pneumonitis with dyspnea (adequate pulmonary function is defined as pulse oximetry > 94% on room air if there is clinical indication for determination (e.g. dyspnea at rest, history of interstitial pneumonitis, etc.)); Fasting cholesterol > 300 mg/dL or fasting triglyceride > 400 mg/dL
  • Subjects cannot have uncontrolled infection or infectious disease(s) that is/are exclusionary for / mimickers of iMCD
  • Subjects cannot have rheumatologic disease(s) that is/are exclusionary for / mimickers of iMCD
Show all 14Show fewer
  • Subjects cannot have a prior malignancy except for: (1) adequately treated basal cell or squamous cell skin cancer, (2) in situ cervical cancer, or (3) other cancer for which the subject has not received treatment within one year prior to enrollment
  • Subjects cannot have a documented history of human immunodeficiency virus (HIV) or HHV-8 infection, or severe combined immunodeficiency syndrome
  • Subjects cannot have a history of liver or lung transplantation
  • Subjects cannot have ongoing or planned participation in another clinical trial involving iMCD directed treatment or that involves immunomodulatory or anti-neoplastic treatment
  • Subjects cannot have prior sensitivity / allergy to any formulation of sirolimus, its components or its analogues
  • Subjects cannot have serious medical illness, or psychiatric illness or disorders that could potentially interfere with the completion of treatment according to this protocol or participation in the trial
  • Subjects cannot have psychiatric disorders that compromises the ability to provide informed consent
  • Subjects cannot have any other condition or finding that in the opinion of the investigator would make participation in this trial inappropriate

Trial locations and contacts

2 sites in 1 country.

United States2 sites
  • University of Arkansas for Medical Sciences

    Little Rock, Arkansas, 72205

  • University of Pennsylvania

    Philadelphia, Pennsylvania, 19104

Other trials in United States

About this study

Official title: A Phase II, Single-arm Open-label Multi-center Study of Sirolimus in Previously Treated Idiopathic Multicentric Castleman Disease

The purpose of this study is to understand the impact of sirolimus on idiopathic multicentric Castleman disease.

Read the detailed description

Human herpesvirus(HHV)-8-negative, idiopathic multicentric Castleman disease (iMCD) is a rare hematologic illness. Current therapeutic options are limited and provide benefit for only a subset of patients. Blockade of IL-6 signaling with siltuximab or tocilizumab abrogates symptoms and improves lymphadenopathy in a portion of patients. However, 66% of patients in the siltuximab Phase II clinical trial did not meet response criteria, and recent studies found that IL-6 is not significantly elevated in many iMCD patients. Recent research has suggested a key role for the phosphoinositide 3-kinase(PI3K)/Akt/mechanistic target of rapamycin (mTOR) pathway in iMCD pathogenesis and off-label administration of sirolimus, an mTOR inhibitor, has shown clinical activity. Based on these experiences, we plan to evaluate the efficacy of sirolimus as a therapy for iMCD patients who are either unable to tolerate anti-IL-6 blockade therapy (siltuximab or tocilizumab), or who fail, relapse, or are refractory to such treatment. This study is a Phase II open label study of daily administration of sirolimus in up to 24 evaluable male or female adults. Participants with iMCD who have failed previous therapy will take daily oral sirolimus for 12 months. Information that is collected as per standard of care will be used to review efficacy, in addition to samples collected specifically for research.

Being tested
Sirolimus
Keywords
Castleman, iMCD, Castleman's Disease, multicentric Castleman's disease, multicentric Castleman disease, idiopathic Castleman disease, idiopathic Castleman's disease, CD, MCD, Castleman Disease
Medical subject headings
Castleman Disease, Multi-centric Castleman's Disease, Macular dystrophy, corneal type 1

What participants receive

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

  • SirolimusDrug

    Also called Rapamune, Rapamycin

    Sirolimus (also known as rapamycin) inhibits the mTOR protein kinase and is approved by the USA FDA for the prevention of allograft rejection in renal transplant patients ≥ 13 years of age and for the treatment of lymphangioleiomyomatosis.

Study groups in NCT03933904
Study groupRoleWhat they receive
SirolimusExperimentalOral sirolimus: For adults, loading dose of 5 mg/m^2, rounded to the nearest mg, on day 1. For adults, starting on day 2, oral sirolimus daily at 2.5 mg/m^2/day (rounded to the nearest mg), target trough level 10-15 ng/mL by HPLC, for 12 months. For children, 2 mg/m^2/day, target trough level 5-15 ng/mL by HPLC.
Receives: Drug: Sirolimus

What is being measured

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

  1. Percentage of Patients Achieving a Positive Clinical Benefit Response (CBR)

    Clinical Benefit Response (CBR): The CBR was defined by improvements in clinical symptoms such as fatigue, anorexia, fever, and night sweats.6 Laboratory markers such as hemoglobin levels and weight change were also included in the CBR criteria (Table 1). A CBR was considered positive if there was at least a 25% reduction in the size of the largest lymph node (measured by modified Cheson criteria), a significant improvement in at least one laboratory marker (e.g., hemoglobin), and improvement in at least one clinical symptom without worsening of others.

    Measured: 12 ± 1 months

Secondary outcomes (8)
  1. Percentage of Patients Achieving a Positive Clinical Benefit Response (CBR) Month 3

    Measured: Month 3

  2. Percentage of Patients Achieving a Positive Clinical Benefit Response (CBR) Month 6

    Measured: Month 6

  3. Percentage of Patients Achieving a Positive Clinical Benefit Response (CBR) Month 9

    Measured: Month 9

  4. Percentage of Patients That Remain on Study Drug for the Duration of the Study

    Measured: Up to 73 weeks

  5. Percentage of Patients That Indicate That They Are Currently Receiving Sirolimus at the End of the Follow Up Phase

    Measured: Up to 73 weeks

  6. Disease Activity, as Measured by the CHAP Scale

    The CHAP scale consists of C-reactive protein (CRP), hemoglobin, albumin, and Eastern Cooperative Oncology Group (ECOG) performance score, each with a subscale range of 0-4. Each criterion in the CHAP scoring system provides a graded measure for a patient's disease activity. The sum of the four scores provides an objective scale for measuring a patient's disease activity and monitoring how it changes over time (scale range 0-16). A higher score indicates greater disease activity.

    Measured: 12 months ± 2 weeks

  7. Disease Activity, as Measured by the MCD-related Overall Symptom Score

    MCD-related Overall Symptom Score is measured by 34 MCD-related outcome measures. These scores addressed fatigue, weight change, night sweats, etc. The scores were evaluated and graded (as per CTCAE version 4.0, May, 2009), which was used to assess the efficacy of the study intervention. Each symptom score was measured on a numeric scale, ranging from 1 (no symptom) to 5 (very severe or disabling). Scores were combined to create a combined score per patient at each time point. Patients were then assessed as having no response, a symptomatic response, or a durable symptomatic response. A symptomatic response was defined as a ≥50% decrease in the 34-point symptom score, a durable symptomatic response is a ≥50% decrease in the 34-point symptom score from baseline that was maintained for a minimum of 18 weeks.

    Measured: Month 12

  8. Proportion of Patients Achieving a Lymph Node Response, Following the Modified Cheson Response Criteria

    Radiological response was assessed using the modified Cheson criteria, which quantify changes in lymph node size. A lymph node response was defined as a 25% reduction in bi-dimensional measurements of the largest lymph node compared to baseline. Patients were then assessed according to the following responses:

    Complete Response: All index lesion(s) must have regressed to normal size (≤1.0 cm in their greatest transverse diameter. No new sites of lymphadenopathy >1.5 cm in longest dimension.

    Partial Response: ≥50% decrease in sum of the products of the greatest diameters (SPD) of index lesion(s), and no new sites of lymphadenopathy >1.5 cm in longest dimension.

    Stable Disease: Failure to achieve a CR or PR (see above) without evidence of progressive disease.

    Progressive Disease: ≥50% increase from nadir in the SPD of any index lesion, or appearance of any new sites of lymphadenopathy that measure >1.5 cm in longest dimension during or at the end of therapy.

    Measured: Month 12

Timeline

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

  1. First posted1 May 2019
  2. Study start25 Sep 2019
  3. Primary completion30 Jun 2024
  4. Study completion30 Jun 2027 (estimated)

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 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
7 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03933904
Sponsor's protocol ID
832465
Status last verified
Aug 2026
First submitted
29 Apr 2019
Last updated
20 Aug 2026
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No: There is no current plan to share IPD.

Publications

  • van Rhee F, Oksenhendler E, Srkalovic G, Voorhees P, Lim M, Dispenzieri A, Ide M, Parente S, Schey S, Streetly M, Wong R, Wu D, Maillard I, Brandstadter J, Munshi N, Bowne W, Elenitoba-Johnson KS, Fossa A, Lechowicz MJ, Chandrakasan S, Pierson SK, Greenway A, Nasta S, Yoshizaki K, Kurzrock R, Uldrick TS, Casper C, Chadburn A, Fajgenbaum DC. International evidence-based consensus diagnostic and treatment guidelines for unicentric Castleman disease. Blood Adv. 2020 Dec 8;4(23):6039-6050. doi: 10.1182/bloodadvances.2020003334.

    PubMed 33284946
  • Arenas DJ, Floess K, Kobrin D, Pai RL, Srkalovic MB, Tamakloe MA, Rasheed R, Ziglar J, Khor J, Parente SAT, Pierson SK, Martinez D, Wertheim GB, Kambayashi T, Baur J, Teachey DT, Fajgenbaum DC. Increased mTOR activation in idiopathic multicentric Castleman disease. Blood. 2020 May 7;135(19):1673-1684. doi: 10.1182/blood.2019002792.

    PubMed 32206779
  • Fajgenbaum DC, Langan RA, Japp AS, Partridge HL, Pierson SK, Singh A, Arenas DJ, Ruth JR, Nabel CS, Stone K, Okumura M, Schwarer A, Jose FF, Hamerschlak N, Wertheim GB, Jordan MB, Cohen AD, Krymskaya V, Rubenstein A, Betts MR, Kambayashi T, van Rhee F, Uldrick TS. Identifying and targeting pathogenic PI3K/AKT/mTOR signaling in IL-6-blockade-refractory idiopathic multicentric Castleman disease. J Clin Invest. 2019 Aug 13;129(10):4451-4463. doi: 10.1172/JCI126091.

    PubMed 31408438

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Sirolimus in people with Castleman Disease and Castleman's Disease, Multicentric, run by University of Pennsylvania at 2 sites in United States.

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 6 inclusion and 14 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: under way, not looking for participants, as of the sponsor's last update on 20 Aug 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 2 sites in United States. 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 phase mean?

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 8 Aug 2025). 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?

Percentage of Patients Achieving a Positive Clinical Benefit Response (CBR) (time frame: 12 ± 1 months). 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 NCT03933904, which also lists 3 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 20 Aug 2026.

Free account

Log in to keep searching

You’ve used your 3 free searches. AzTrials is free: log in or create a free account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in