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Cyclophosphamide and Fludarabine to Treat Lupus Nephritis

3. marts 2008 opdateret af: National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)

Combination of Cyclophosphamide and Fludarabine for Lupus Nephritis: Tolerance, Toxicity, Efficacy and Effects on B and T Lymphocyte Regeneration

This study will test the safety and effectiveness of combination therapy with cyclophosphamide (Cytoxan) and fludarabine in treating lupus nephritis (kidney inflammation). This condition, common in patients with systemic lupus erythematosus, is caused by abnormal action of immune cells called lymphocytes against the kidneys. Left untreated, severe cases can result in loss of kidney function. The current treatment of choice-intermittent high doses (pulses) of cyclophosphamide-does not work in all patients and causes infertility in many women. The rate of infertility in men is not known. This study will examine whether fludarabine can safely be given with significantly lower doses of cyclophosphamide, and if this combination controls kidney inflammation.

Patients 18 years of age and older with severe lupus nephritis (called proliferative lupus nephritis) may be eligible for this study. Candidates will have a history and physical examination; blood and urine tests; chest X-ray; electrocardiogram; cancer screening that may include a Pap smear, mammogram, rectal examination, PSA testing, and sigmoidoscopy.

Participants will be divided into one of the following treatment groups:

Group 1-Patients undergo three treatment cycles of cyclophosphamide, taken by mouth, and fludarabine, injected subcutaneously (under the skin). Patients receive both drugs on day 1 of the cycle, and fludarabine alone on days 2 and 3. This regimen is repeated once every 5 weeks for three cycles.

Group 2-Same as for Group 1, except fludarabine injections are given intravenously (through a vein) for the second treatment cycle. Patients in this group have frequent blood sampling during the first and second treatment cycles to monitor blood levels of the drug. Samples are collected before the first injection is given and at 0.5, 1, 1.5, 2, 4, 8, 24 and 48 hours after the third injection. A total 12 tablespoons of blood is drawn over a 2-month period.

All patients will have blood drawn once or twice a week during the first two cycles and then less frequently to monitor blood counts. Some patients will have the following additional procedures to test the effects of treatment on lymphocytes:

  1. Blood sample collection
  2. Bone marrow aspiration-The skin over the hip bone is cleaned and a local anesthetic is injected into the outer covering of the bone. Bone marrow is suctioned through the needle into an attached syringe. The procedure is done before treatment begins, at the end of treatment, and 6 months after treatment.
  3. Tonsillar biopsy-The tonsils are numbed with a local anesthetic and 1 to 4 pieces of tissue are removed using special forceps. The procedure is done before treatment begins, at the end of treatment, and 6 months after treatment.
  4. Magnetic resonance imaging (MRI) of the abdomen-The patients lies on a table in a narrow cylinder (the MRI scanner) containing a strong magnetic field, which is used to create images of parts of the body in small section views.

Patients will be followed for at least 24 months to monitor late side effects and the response to treatment.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Studies at the NIH Clinical Center have shown that intermittent pulse cyclophosphamide therapy is effective for treating patients with severe lupus nephritis, but may result in substantial rates of sustained amenorrhea. Initial studies in patients with autoimmune rheumatic diseases have also suggested a beneficial effect from the lymphocyte-specific nucleoside analogs chlorodeoxyadenosine and fludarabine. Cyclophosphamide induces DNA cross-links whereas, nucleoside analogs inhibits DNA repair indicating complementary and partially synergistic modes of action. Whether combination of lower doses of cyclophosphamide with nucleoside analogs will increase efficacy while at the same time minimize toxicity from higher-cumulative doses of cyclophosphamide has not been determined. In this phase I/II study, 15 patients with proliferative lupus nephritis will be treated as outpatients with a combination of oral cyclophosphamide (500 mg/m(2)) on day 1 followed by fludarabine (30 mg/m(2)) subcutaneously on days 1, 2 and 3 every month for 3 cycles. The cumulative dose of cyclophosphamide in this regimen is approximately 2.5g as compared to greater than or equal to 30g in the standard NIH cyclophosphamide regimen. In this study the tolerance and toxicity of this combination will be studied. Regeneration of T and B cells following depletion including analysis of antigen-repertoire and function will also be examined. Preliminary efficacy information, including rates and time to renal remission and rates of preservation of renal function, will be analyzed to be used for future controlled studies. Pharmacokinetic analysis will be performed on a subset of patients to determine the bioavailability and pharmacokinetic parameters of subcutaneous fludarabine.

Undersøgelsestype

Interventionel

Tilmelding

15

Fase

  • Fase 1

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Forenede Stater
    • Maryland
      • Bethesda, Maryland, Forenede Stater, 20892
        • National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Barn
  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

Patients must be 18 years of age or older and able to provide informed consent.

Patients must have at least 4 criteria for SLE as defined by the American Rheumatism Association (ARA).

Active glomerulonephritis with:

Renal biopsy within 1 year with class III or class IV active lupus nephritis, AND;

Abnormal urine analysis:

Greater than 10 RBC/hpf and cellular (RBC, WBC or mixed) casts, OR;

Greater than 10 RBC/hpf and proteinuria greater than 2 g/day, OR;

Proteinuria greater than 3.5 g/day.

No patients with severe proliferative lupus nephritis: a. very active renal histology with crescents or necrosis in more than 25% of glomeruli; or b. rapidly progressive glomerulonephritis (doubling of serum creatinine in less than or equal to 3 months); or c. severe impairment of renal function Cr greater than 2.5 mg/dL or GFR less than 50 mL/min measured by inulin clearance.

Patient has not had previous immunosuppressive therapy:

Patients must not be receiving azathioprine, cyclosporine, methotrexate. Patients receiving these drugs will be eligible only if these drugs are discontinued and after a waiting period of greater than or equal to 4 weeks;

Patients must not be receiving cyclophosphamide:

Greater than 3 pulses (maximum 1 g/m(2)/pulse) within the last 12 months or since last renal biopsy showing active disease; OR

greater than 6 pulses ever.

Patients must not have had pulse therapy with glucocorticoids or any experimental therapy during the 4 weeks before study entry.

Patients who need at study entry oral corticosteroids in dosages greater than 0.5 mg/kg/day of predisone to control extrarenal disease are not eligible.

Patients with active or chronic infection are not eligible.

Patients who are pregnant, breast-feeding or using inadequate birth control are not eligible.

Patients who have poorly controlled diabetes mellitus or with evidence of end-organ damage are not eligible.

No history of cerebrovascular accident, seizures within the last 5 years or chronic neurologic disease.

No history of malignancy other than squamous cell and/or basal carcinoma of the skin.

No confounding medical illness that in the judgment of investigators would pose added risk for study participants such as:

Unstable coronary artery disease, cardiomyopathy or dysrhythmia requiring therapy;

Pulmonary disease (PFTs less 70% of predicted value or DLCO less than 60%), or;

Hematologic disease (Hb less than 8 mg/dL, platelets less than 100,000 micro liters or WBC less than 2,500/micro liters.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. januar 1998

Studieafslutning

1. november 2002

Datoer for studieregistrering

Først indsendt

3. november 1999

Først indsendt, der opfyldte QC-kriterier

3. november 1999

Først opslået (Skøn)

4. november 1999

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

4. marts 2008

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

3. marts 2008

Sidst verificeret

1. november 2002

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 980055
  • 98-AR-0055

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

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