Now Available for Public Comment: Notice of Proposed Rulemaking (NPRM) for FDAAA 801 and NIH Draft Reporting Policy for NIH-Funded Trials

Ofatumumab Maintenance Treatment vs No Further Treatment in Relapsed CLL Responding to Induction Therapy (PROLONG)

This study is ongoing, but not recruiting participants.
Information provided by (Responsible Party):
GlaxoSmithKline Identifier:
First received: December 23, 2009
Last updated: November 13, 2014
Last verified: October 2014

The purpose of this study is to determine if maintenance therapy with ofatumumab will prolong remission in patients with CLL who have responded to second or third line treatment. This study will also evaluate the safety of ofatumumab maintenance compared to observation (the current standard of care). This study was co-developed with the HOVON and NORDIC CLL group and will be conducted as a collaborative effort with GSK.

Condition Intervention Phase
Leukaemia, Lymphocytic, Chronic
Biological: Ofatumumab
Other: Observation
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: A Phase III, Open Label, Randomized, Multicenter Trial of Ofatumumab Maintenance Treatment Versus no Further Treatment in Subjects With Relapsed Chronic Lymphocytic Leukemia (CLL) Who Have Responded to Induction Therapy

Resource links provided by NLM:

Further study details as provided by GlaxoSmithKline:

Primary Outcome Measures:
  • Progression free survival [ Time Frame: 280 events, ~72 months ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Overall survival [ Time Frame: 5 year f/u after end of study, ~2021 ] [ Designated as safety issue: No ]
  • Clinical benefit, safety, tolerability [ Time Frame: 280 events, ~72 months ] [ Designated as safety issue: Yes ]
  • Pharmacokinetic- plasma ofatumumab concentrations (ARM A only) [ Time Frame: 280 events, ~72 months ] [ Designated as safety issue: No ]

Estimated Enrollment: 532
Study Start Date: May 2010
Estimated Study Completion Date: May 2017
Primary Completion Date: June 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: ARM A: Ofatumumab
Ofatumumab Treatment: 300 mg IV Week 1 followed by 1000 mg IV Week 2 1000 mg IV (a dose every 8 weeks for up to 2 years following the first 1000 mg dose)
Biological: Ofatumumab
Ofatumumab for maintenance therapy as IV infusions every 8 weeks . The first dose will be 300 mg followed 1 week later by 1000 mg and 1000 mg every 8 weeks thereafter for up to 2 years).
ARM B: Observation and assessments as per Arm A
Disease status assessments to determine subject response or progression will be performed approximately every 8 weeks for up to 2 years for both arms according to IWCLL criteria
Other: Observation
Observation/Safety Evaluation


Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Adults with documented diagnosis of CLL based on the modified IWCLL updated NCI-WG guidelines (Hallek, 2008)
  • At least PR according to the revised 2008 NCI-WG CLL criteria, within 3 months of the response assessment after the last dose of 2nd/3rd line treatment
  • The anti-leukemic treatment before study entry should have been at least 3 months or 3 cycles
  • ECOG Performance Status of 0-2
  • Signed written informed consent prior to performing any study-specific procedures

Exclusion Criteria:

  • Known primary or secondary fludarabine-refractory subjects, defined as treatment failure (failure to achieve a CR or PR) or disease progression within 6 months
  • Prior maintenance therapy
  • Known transformation of CLL (eg.Richter's transformation), prolymphocytic leukemia (PLL), or CNS involvement of CLL
  • Active Autoimmune hemolytic anemia (AIHA) requiring treatment except if in the opinion of the investigator and medical monitor it is thought not to affect the subject's safety, the conduct of the study or the interpretation of the data
  • Previous autologous or allogeneic stem cell transplantation
  • Chronic or current active infectious disease requiring systemic antibiotics, antifungal, or antiviral treatment such as, but not limited to chronic renal infection, chronic chest infection with bronchiectasis, tuberculosis and active Hepatitis B or C
  • Other past or current malignancy (with the exception of basal cell carcinoma or the skin or in situ carcinoma of the cervix or breasts) unless the tumor was successfully treated with curative intent at least 2 years prior to trial entry except if in the opinion of the investigator and medical monitor it is thought not to affect the subject's safety, the conduct of the study or the interpretation of the data
  • Clinically significant cardiac disease, including unstable angina, acute myocardial infarction within 6 months prior to screening, congestive heart failure, and arrhythmia requiring therapy, with the exception of exta systoles or minor conduction abnormalities except if in the opinion of the investigator and medical monitor it is thought not to affect the subject's safety, the conduct of the study or the interpretation of the data
  • History of significant cerebrovascular disease or event with symptoms or sequelae
  • Significant concurrent, uncontrolled medical condition that in the opinion of the investigator or GSK medical monitor contraindicates participation in this study
  • Other anti-leukemic use of medications including glucocorticoids
  • Known HIV positive
  • Screening laboratory values: platelets <50 x 109/L, neutrophils<1.0 x 109/L, Creatinine > 1.5 X upper normal limit (unless normal creatinine clearance), total bilirubin >1.5 X upper normal limit, ALT >2.5 X upper normal limit (unless due to liver involvement of CLL), alkaline phosphase > 2.5 X upper normal limit
  • Known or suspected hypersensitivity to ofatumumab that in the opinion of the investigator or medical monitor contraindicates study participation
  • Subjects who have received treatment with any non-marketed drug substance or experimental therapy within 5-terminal half-lives or 4 weeks whichever is longer prior to first dose of study medication or currently participating in any other interventional clinical study Note: Participation in any other interventional clinical study after disease progression during post PD follow-up is permitted
  • Lactating women, women with a positive pregnancy test at Visit 1 or women (of childbearing potential) as well as men with partners of childbearing potential, who are not willing to use adequate contraception from study start through one year following last ofatumumab dose. Adequate contraception is defined as abstinence, oral hormonal birth control, implants of levonorgestrel, estrogenic vaginal ring, percutaneous contraceptive patches, intrauterine device, and male partner sterilization if male partner is sole partner for that subject. For females in the USA, the use of a double barrier method is also considered adequate (condom or occlusive cap plus spermicidal agent).
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01039376

  Show 203 Study Locations
Sponsors and Collaborators
Study Director: GSK Clinical Trials GlaxoSmithKline
  More Information

No publications provided

Responsible Party: GlaxoSmithKline Identifier: NCT01039376     History of Changes
Other Study ID Numbers: 112517
Study First Received: December 23, 2009
Last Updated: November 13, 2014
Health Authority: United States: Institutional Review Board
United States: Food and Drug Administration

Keywords provided by GlaxoSmithKline:
anti-CD20 monoclonal antibody
maintenance therapy

Additional relevant MeSH terms:
Leukemia, Lymphocytic, Chronic, B-Cell
Leukemia, Lymphoid
Immune System Diseases
Immunoproliferative Disorders
Leukemia, B-Cell
Lymphatic Diseases
Lymphoproliferative Disorders
Neoplasms by Histologic Type processed this record on November 20, 2014