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TerminatedNCT00638820Updated Dec 28, 2017Results posted

Reduced Intensity AlloTransplant For Osteopetrosis

A Phase 2 interventional study of Stem Cell or Umbilical Cord Blood Transplantation and Campath, Busulfan, Clofarabine in Osteopetrosis, sponsored by Masonic Cancer Center, University of Minnesota. Terminated at 1 site in United States. Open to participants aged Up to 45 Years. Per ClinicalTrials.gov, last updated 2017-12-28.

Sponsored by Masonic Cancer Center, University of Minnesota · Phase 2, Interventional, and Treatment

Why this study was terminated
Excess toxicity
Phase
Phase 2
Study type
Interventional
Enrollment
3
Allocation
Not applicable
Ages
Up to 45 Years
Sex
All
01

Study summary

We believe that hematopoietic stem cell transplantation (HSCT) will help subjects with Osteopetrosis generate functioning osteoclasts, and by so doing assist in the resolution of the abnormal bone architecture, and the anemia and bone marrow failure that is also characteristic of this disease. However, we have found in past studies that approximately 30% of Osteopetrosis patients do not engraft. Therefore, in this study, we plan to use a different combination of pre-transplant drugs to try to make transplants safer for this disease, as well as to provide a second infusion of stem cells in patients with matched related or unrelated donors. The purpose of this research is to find a safer and more effective means of performing stem cell transplantation in patients with Osteopetrosis, using chemotherapy and radiation designed to bring about engraftment and lessen transplant mortality.

Read the detailed description

This transplant protocol will test the following: 1) the ability to achieve engraftment with the reduced intensity protocol, 2) the mortality associated with transplant by day 100, 3) patient outcomes, based on differential imaging and biologic evaluations prior to transplantation and at designated points after transplantation (day 100, 6 months, 1, 2 and 5 years). Additional biologic studies will include microarray analysis, Campath levels just prior to the administration of the graft, and establishment of mesenchymal stem cell lines. In older patients, studies to evaluation osteoclast differentiation and function will also be offered.

02

Conditions studied

  • Osteopetrosis

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Keywords

  • osteopetrosis
03

In context

Osteopetrosis

22 studies on the registry are indexed under Osteopetrosis; 4 are open to participants now.

This study's enrollment of 3 is below the median of 15 across 17 interventional studies indexed under Osteopetrosis.

Browse Osteopetrosis studies →

Lead sponsor

Masonic Cancer Center, University of Minnesota is the lead sponsor of 286 studies on the registry; 35 are open to participants now.

Of its 39 completed or terminated interventional studies of FDA-regulated products, 28 (72%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
Up to 45 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Patients eligible for transplantation under this protocol will be \<45 years of age, and will be diagnosed with severe osteopetrosis. This will be defined as having the following manifestations of the disease.
  • Bones that are uniformly markedly dense based on skeletal survey
  • No history that would suggest autosomal dominant inheritance
  • Evidence of hematologic changes that are attributed to the underlying disease, including the need for ongoing transfusions, OR
  • the presence of progressive anemia or thrombocytopenia, OR a white blood cell differential with a predominance of immature forms and evidence of extramedullary hematopoiesis, OR
  • persistence of serious infectious complications that are thought to be due to the abnormal architecture of the bone that are resistant to surgical and medical interventions.

Exclusion criteria

Exclusion Criteria:

  • Patients >45 years of age
  • Evidence of hepatic failure
  • pulmonary dysfunction sufficient to substantially increase the risk of transplant
  • Renal dysfunction with (GFR) \<30% of predicted.
  • Cardiac compromise sufficient to substantially increase the risk of transplantation
  • Severe, stable neurologic impairment.
  • (HIV) positivity.
  • Pregnant or lactating females
Terms in these criteria, in plain language(2)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

GFR and eGFR (kidney filtering)

GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².

Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
3 participants (actual)

Study arms

  • Experimental
    Intent-To-Treat

    Patients enrolled and received study treatment.

    Procedure: Stem Cell or Umbilical Cord Blood Transplantation · Drug: Campath, Busulfan, Clofarabine · Procedure: Total Lymphoid Irradiation

Interventions

  • ProcedureStem Cell or Umbilical Cord Blood Transplantation

    Stem Cell (unrelated or matched related donor grafts (both peripheral blood and marrow) infusion on Day 0 and 42; Umbilical Cord Blood on Day 0 and 42

    Also known as: Bone Marrow Transplant

  • DrugCampath, Busulfan, Clofarabine

    Drug pages: Alemtuzumab · Busulfan · Clofarabine

    * 12 Campath-1H 0.3 mg/kg intravenously (IV) over 2 hours * 11 Campath-1H 0.3 mg/kg intravenously over 2 hours * 10 Campath-1H 0.3 mg/kg intravenously over 2 hours * 9 Busulfan \<12 kg: 2.2 mg/kg/dose IV every 12 hours \>12 kg: 1.6 mg/kg/dose IV every 12 hours * 8 Busulfan \<12 kg: 2.2 mg/kg/dose IV every 12 hours \>12 kg: 1.6 mg/kg/dose IV every 12 hours * 7 "Rest" * 6 Clofarabine 40 mg/m2 intravenously over 2 hours * 5 Clofarabine 40 mg/m2 intravenously over 2 hours * 4 Clofarabine 40 mg/m2 intravenously over 2 hours * 3 Clofarabine 40 mg/m2 intravenously over 2 hours * 2 Clofarabine 40 mg/m2 intravenously over 2 hours

    Also known as: Busulfex, Clolar,Alemtuzumab

  • ProcedureTotal Lymphoid Irradiation

    Dose 500 cGy via anteroposterior (AP) and posteroanterior (PA) fields (250 cGy AP and 250 cGy PA).

    Also known as: Therapuetic radation, radiation therapy

06

What researchers measure

Primary outcomes

  1. Number of Patients Achieving Donor Cell Engraftment

    Number of patients with persistent presence of donor-derived cells at Day 100

    Time frame: Day 100

Secondary outcomes

  1. Number of Patients With Transplant Related Death

    Number of participants died during study by Day 100 and reason for death was related to transplant.

    Time frame: Day 100

  2. Number of Patients With Transplant Related Toxicity

    Number of patients experiencing adverse effects due to transplant categorized by body system using Common Terminology Criteria for Adverse Events coding from the National Cancer Institute, Version 3.0.

    Time frame: Day 100

  3. Differential Imaging and Biologic Evaluations

    These outcome measures were not assessed due to early study termination.

    Time frame: Day 100, 6 months, 1, 2 and 5 years

07

Results

Posted Feb 3, 2010
Limitations and caveats
Only 3 participants were treated in this study; all died by Day 100. Data for both treatment arms were combined due to low number. (Arm 1 utilized mobilized peripheral blood or marrow (related or unrelated). Arm 2 received cord blood transplants).

Participant flow

Participant flow — Overall Study
MilestonePatients With Osteopetrosis Who Received Transplant
Started3
Completed3
Not completed0

Outcome measures

PrimaryNumber of Patients Achieving Donor Cell Engraftment

Number of patients with persistent presence of donor-derived cells at Day 100

Time frame:
Day 100
Reported as:
Number · Participants
Number of Patients Achieving Donor Cell Engraftment
ParticipantsPatients With Osteopetrosis Who Received Transplant
Number of Patients Achieving Donor Cell Engraftment2
SecondaryNumber of Patients With Transplant Related Death

Number of participants died during study by Day 100 and reason for death was related to transplant.

Time frame:
Day 100
Reported as:
Number · Participants
Number of Patients With Transplant Related Death
ParticipantsPatients With Osteopetrosis Who Received Transplant
Number of Patients With Transplant Related Death3
SecondaryNumber of Patients With Transplant Related Toxicity

Number of patients experiencing adverse effects due to transplant categorized by body system using Common Terminology Criteria for Adverse Events coding from the National Cancer Institute, Version 3.0.

Time frame:
Day 100
Reported as:
Number · Participants
Number of Patients With Transplant Related Toxicity
ParticipantsPatients With Osteopetrosis Who Received Transplant
Neurologic1
Renal1
Pulmonary3
Peri-Transplant Mortality (Death by Day 100)3
Vascular1
SecondaryDifferential Imaging and Biologic Evaluations

These outcome measures were not assessed due to early study termination.

Time frame:
Day 100, 6 months, 1, 2 and 5 years

No measurements were reported for this outcome.

Adverse events

Collected over Adverse events were collected from Day 1 through Day 100 of the study.. Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Patients With Osteopetrosis Who Received Transplant—3/3 (100%)3/3 (100%)
Most frequent serious events
Most frequent serious events
EventPatients With Osteopetrosis Who Received Transplant
Death, peri-transplantGeneral disorders3/3
Most frequent other events
Most frequent other events
EventPatients With Osteopetrosis Who Received Transplant
PulmonaryRespiratory, thoracic and mediastinal disorders3/3
NeurologicNervous system disorders1/3
RenalRenal and urinary disorders1/3
VascularVascular disorders1/3

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)Patients With Osteopetrosis Who Received Transplant
<=18 years2
Between 18 and 65 years1
>=65 years0
Sex: Female, Male
Sex: Female, Male(Participants)Patients With Osteopetrosis Who Received Transplant
Female0
Male3
Region of Enrollment
Region of Enrollment(participants)Patients With Osteopetrosis Who Received Transplant
United States3
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Study locations

1 site
  • University of MInnesota, Fairview
    Minneapolis, Minnesota 55455, United States
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 28, 2017, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT00638820
First posted
Mar 19, 2008
Start date
Sep 2007
Primary completion
May 2008
Completion
May 2008
Results posted
Feb 3, 2010
Last update
Dec 28, 2017

Study contacts

Paul Orchard, MD
principal investigator · Masonic Cancer Center, University of Minnesota

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

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Studies of the drugs tested here: Alemtuzumab · Busulfan · Clofarabine

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