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NCT Number: NCT01079143

Progression of Renal Interstitial Fibrosis / Tubular Atrophy (IF/TA) According to Epithelial-mesenchymal Transition (EMT) and Immunosuppressive Regimen (Everolimus Based Versus CNI Based) in de Novo Renal Transplant Recipients

Recently, early biomarkers of renal interstitial fibrosis have been identified, amongst them de novo expression of vimentin by tubular epithelial cells, which is an intermediate filament, and the translocation of beta-catenin into their cytoplasm. These markers, when present, suggest that the epithelial cell undergoes a phenomenon well known as "epithelial to mesenchymal transition" (EMT) and could behaves like a myo-fibroblast. EMT is highly instrumental in several models of tissue fibrosis, including in the kidney. Actually, it has not only been demonstrated that these markers are detectable in the renal graft at an early time point post-transplant (i.e. as soon as three months), but also that the intensity of their expression correlates with the progression of interstitial fibrosis of the graft between 3 and 12 months

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Key information

Conditions

Renal Interstitial Fibrosis

Age range

19 year–75 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 3

Primary location

Novartis Investigative Site, Caen, Cedex, France

Loading trial locations.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Recipient of a primary or secondary deceased or living (related or not) donor kidney transplant and who requires basiliximab induction therapy.
  • Cold ischemia time < 30 hours.
  • Women of child-bearing age, even those with a history of infertility, must have had a negative pregnancy test during the 7 days before screening or at the time of screening, and must use a recognized and reliable method of contraception throughout the study and for 2 months after discontinuing the study treatment.
  • Patients who want and are able to take part in the entire study, and have given their written consent.
  • Patients who are registered with a French national health insurance scheme or are covered by such a scheme.

Exclusion criteria

  • Recipient of multi-organ transplantation, including dual kidneys, or who have previously received non renal transplant organ.
  • Patients receiving a graft from a non-heart-beating donor.
  • Anti-HLA antibody levels ≥ 20% in the last 3 months before the inclusion.
  • ABO incompatible graft or with positive cross match T.
  • Severe hyperlipidemia: total cholesterol ≥ 9.1 mmol/L (≥ 350 mg/dL) and/or triglycerides ≥ 8.5 mmol/L (≥ 750 mg/dL) despite appropriate lipid-lowering therapy.
  • Known hypersensitivity or contraindications to mycophenolic acid, cyclosporine or lactose.
  • Known hypersensitivity or contraindications to macrolides or drugs of the mTOR inhibitor class.
  • HIV seropositive, or active chronic hepatitis B (HBs Ab) or C. Results obtained during the 6 months before the inclusion are accepted. Recipients from donors with hepatitis B or C will be excluded.
  • Patients with thrombocytopenia (≤ 75000/mm3), absolute neutrophil count (≤ 1500/mm3), leukocytopenia (≤ 2500/mm3) and/or hemoglobin < 8g/dL at the inclusion visit.
  • ASAT, ALAT or total bilirubin ≥ 3 UNL.
  • Uncontrolled severe infection, severe allergy requiring an acute or chronic treatment.
  • Patients with a malignant disease or previous malignancy in the past 5 years, with the exception of excised basal cell or squamous cell carcinoma and in situ cervical cancer treated.
  • Medical or surgical condition, with the exception of the transplantation, which in the investigator's opinion could exclude the patient.
  • Women who are pregnant, breastfeeding or of reproductive age and refuse or are unable to use a recognized and reliable method of contraception.
  • Patients with symptoms of significant mental or somatic disease. Inability to cooperate or communicate with the investigator.
  • Patients under supervision or guardianship or any patient subject to legal protection

Randomization criteria:

Eligibility criteria (no later than 4 months post-transplantation:

  • Renal graft biopsy performed at M3 and adequate histological material sent within the deadline for the determination of EMT.
  • Woman of child-bearing potential, even in case of a history of infertility, must use a recognized and reliable method of contraception throughout the study and for 2 months after discontinuing the study treatment.

Non-eligibility criteria (no later than 4 months post-transplantation):

  • Acute rejection histologically proven between transplantation and randomization (local reading).
  • Acute subclinical rejection diagnosed on the M3 biopsy (except borderline lesions) (local reading).
  • Positive anti-donor antibodies at M3.
  • Estimated glomerular filtration rate (eGFR) < 30 ml/min/1.73 m2 (MDRDa).
  • Proteinuria ≥ 1 g/24h.
  • Severe hyperlipidemia: total cholesterol ≥ 9.1 mmol/L (≥ 350 mg/dL) and/or triglycerides ≥ 8.5 mmol/L (≥ 750 mg/dL) despite appropriate lipid-lowering therapy.
  • Thrombocytopenia (≤ 75000/mm3), absolute neutrophil count (≤ 1500/mm3), leukocytopenia (≤ 2500/mm3) and/or hemoglobin < 8 g/dL.
  • ASAT, ALAT or total bilirubin ≥ 3 UNL.
  • Medical or surgical condition which in the investigator's opinion might exclude the patient.

Other protocol-defined inclusion/exclusion criteria may apply.

Treatment and study plan

Certican®

Drug

Certican® was supplied to the participating centers by Novartis for the whole duration of the study in the form of tablets containing 0.75, 0.5 and 0.25 mg and packaged in blister packs.

Other names: Everolimus, RAD001

Neoral

Drug

Neoral® was also supplied to participating centers for the entire duration of the study in the form of soft capsules of 10 mg, 25 mg, 50 mg and 100 mg, and packaged in blister packs.

Other names: Cyclosporine

Myfortic

Drug

Myfortic ® was supplied to the participating centers for the duration of the study in the form of 180 and 360 mg gastro-resistant, film-coated tablets. Myfortic® treatment was provided to patients preoperatively or within 24 hours post-transplantation according to the practices of the center. The starting dose was generally 1,440 mg/day, in 2 daily oral fractions, administered at 12 hour intervals up to randomization. Depending on the practices of the center and for the first 6 weeks post-transplantation, a maximum daily dose of 2160 mg of Myfortic® could be administered. In the Neoral® group, the daily dose of 1440 mg was maintained throughout the study.

In the Certican® group, the dose was halved (i.e. 720 mg/day) on introducing Certican® and maintained at 720 mg/day until the end of the study.

An increase in the daily dose of Myfortic® (in the Certican® group) was not authorized unless this was a temporary increase that did not exceed a period of 14 consecutive days.

Simulect®

Drug

The administration of Simulect® was part of the standard immunosuppressant therapy. This induction therapy was provided to patients in the form of commercial ampoules each containing 20 mg. Simulect® was administered to each patient at the dose of 20 mg on D0 and D4 post-transplantation.

Other names: basiliximab

Corticosteroids

Drug

An intravenous steroid treatment could be administered peri or intraoperatively according to local practice at each center. Oral steroid treatment was quickly introduced (in the week following transplantation) at a daily dose of 20 mg and was then reduced and continued throughout the study at a minimum dose of 5 mg/day.

Primary outcomes

  1. Number of Participants With Progression of Renal Graft Fibrosis (Primary Comparison - ITT Population

    Time frame: Month 3 (M3) and Month 12 (M12) post transplantation

    Progression of Interstitial Fibrosis/Tabular Atrophy (IF/TA) is the percentage (%) of participants with an increase >= 1 in IF/TA grade according to Banff (2005 - 2007)according to Epithelial-mesenchymal transition (EMT) profile and by treatment groups.

    Grade I (the better): mild interstitial fibrosis and tubular atrophy (<25% of cortical area) Grade II : moderate interstitial fibrosis and tubular atrophy (26-50% of cortical area) Grade III (the worse) : severe interstitial fibrosis and tubular atrophy (>50% of cortical area)

Secondary outcomes

  1. Interstitial Fibrosis/Tabular Atrophy (IF/TA)

    Time frame: M3 and M12 post transplantation

    Incidence and severity of IF/TA according to 2005/2007 Banff classification system grades (grades l to lll). IF/TA grade was assessed during centralized reading according to the Banff 2005/2007 classification comprising grade I (<25%), grade II (25-50%) and grade III (>50% of lesions).

  2. Change in Interstitial Fibrosis/Tabular Atrophy (IF/TA) Grade

    Time frame: M3 and M12 post transplantation

    Difference (M12 - M3) in IF/TA grade. IF/TA grade was assessed during centralized reading according to the Banff 2005/2007 classification comprising grade I (<25%), grade II (25-50%) and grade III (>50% of lesions).

  3. Risk Factors of IF/TA Progression

    Time frame: M12 post transplantation

    Composite factors regarding fibrosis progression at 12 months using a logistic regression model; the parameters initially considered concerned the demographic characteristics of both recipient and donor, transplantation characteristics, hypertension, diabetes, study treatments, immunosuppression, EMT, IF/TA, function at M3, the onset of acute rejection, the presence of anti-donor antibodies at M12, infections and BK virus viremia.

    Arteriolar hyaline thickening is thickening of the walls of arterioles by the deposition of homogeneous pink hyaline material.

    BPAR is biopsy proven acute rejection. TEM progression is the increase ≥ 1 of TEM score between Month 3 and Month 12

  4. Change in Percentage of Interstitial Fibrosis (IF) by Numerical Quantification

    Time frame: M3 and M12 post transplantation

    Percentage of IF measured by numerical quantification. The IF percentage was transposed in grade according to the following rule: grade 0 for an IF % ≤5%, grade I for an IF % ranging from >5% to < 25%, grade II for an IF % ranging from 25 to 50%, grade III for an IF % >50%. Interstitial graft fibrosis has been identified as the primary cause of graft loss following death with a functional graft [3-5].

  5. Number of Participants With Progression of Renal Fibrosis Using Numerical Quantification

    Time frame: M3 to M12 post transplantation

    Comparisons according to epithelial-mesenchymal transition (EMT) profile and immunosuppressive treatment

  6. Number of Participants With Epithelial-mesenchymal Transition (EMT) Status

    Time frame: M3 and M12 post transplantation

    Incidence and severity of EMT status. EMT status was determined centrally using the graft biopsy taken at 3 months. The result was quickly obtained (within 7 to 15 days) and sent to the company in charge of randomization in order to allocate each patient to a treatment group and to provide the investigator with this information without confirming EMT status.

  7. Number of Participants With Epithelial-mesenchymal Transition (EMT) Score

    Time frame: M3 and M12 post transplantation

    Incidence and severity of EMT score. The intensity of EMT markers expression present and detectable in the renal graft at an early stage following transplantation is known as EMT score.

    EMT score 0 (the best): <1 EMT score 1 (the better): 1-10% of tubular atrophy EMT score 2: 10-25% of tubular atrophy EMT score 3: 25-50% of tubular atrophy EMT score 4 (the worst): >50% of tubular atrophy

  8. Change in EMT Score

    Time frame: M3 and M12 post transplantation

    Change (M12 - M3) in EMT Score. Progression in EMT score is defined as an increase by >=1 of EMT score from M3 to M12.

    EMT score 0 (the best): <1 EMT score 1 (the better) : 1-10% of tubular atrophy EMT score 2 : 10-25% of tubular atrophy EMT score 3 : 25-50% of tubular atrophy EMT score 4 (the worst): >50% of tubular atrophy

  9. Incidence (Number) of Subclinical Rejections and Borderline Lesions

    Time frame: M3

    Incidence of subclinical rejections and borderline lesions with regards to histological evidence of rejection with clinical findings.

    Subclinical rejections: rejection without clinical symptoms which is diagnosed by chance when a graft biopsy is performed.

    Clinically suspected BPAR: rejection suspected because of the presence of clinical symptoms (fever, pain, increase of creatinine) and then confirmed by the graft biopsy.

    Borderline lesions: suspicious for acute T-cell mediated rejection. This category is used when no intimal arteritis is present, but there are foci of tubulitis with minor interstitial infiltration or interstitial infiltration with mild tubulitis.

  10. Change From Baseline (M3) in Estimated Glomerular Filtration Rate (eGFR)

    Time frame: M3 (baseline) to M12 post transplantation

    eGFR was calculated according to the abbreviated Modification of Diet in Renal Disease (MDRD) Formula and creatinine clearance according to the Cockcroft-Gault formula (mL/min/1.73m²).

    LOCF = Last observation carried forward

  11. Change in Estimated Glomerular Filtration Rate (eGFR) at M12 From Baseline (M3) - ANCOVA Model

    Time frame: Baseline (M3), M12

    The average patient renal function was evaluated on the basis of eGFR was calculated according to the abbreviated MDRD formula and creatinine clearance according to the Cockcroft-Gault formula (mL/min/1.73m²).

  12. Change in Urine Protein/Creatinine Ratio (Without Imputation)

    Time frame: Month 3 (baseline), Month 12

    One of the factors associated with EMT progression between M3 and M12 according to univariate analysis (ITT biopsies M3 & M12).

  13. Treatment Failures

    Time frame: M6 and M12 post transplantation

    A treatment failure is defined as biopsy proven acute rejection (BPAR), a graft loss, a death or a loss to follow up. It was assessed between randomization and 6 and 12 months post-transplantation.

  14. Type of Biopsy Proven Acute Rejection (BPAR)

    Time frame: M6 and M12 post transplantation

    A biopsy proven acute rejection (BPAR) is defined as a biopsy graded IA, IB, IIA, IIB or III as per 2005/2007 Banff histological classification system.

    Biopsy graded IA: Significant interstitial infiltration (> 25% of parenchyma) and foci of moderate tubulitis (> 4 mononuclear cells/tubular cross section or group of 10 tubular cells).

    Biopsy grade IB: Significant interstitial infiltration (> 25% of parenchyma) and foci of severe tubulitis (> 10 mononuclear cells/tubular cross section or group of 10 tubular cells).

    Biopsy grade IIA: Mild to moderate intimal arteritis. Biopsy graded IIB: Severe intimal arteritis comprising > 25% of the lumenal area.

    Biopsy graded III: Transmural (full vessel wall thickness) arteritis and/or arterial fibrinoid change and necrosis of medial smooth muscle cells (with accompanying lymphocytic inflammation).

  15. Severity of BPAR

    Time frame: M6 and M12 post transplantation

    A biopsy proven acute rejection (BPAR) is defined as a biopsy graded IA, IB, IIA, IIB or III as per 2005/2007 Banff histological classification system.

    Biopsy graded IA: Significant interstitial infiltration (> 25% of parenchyma) and foci of moderate tubulitis (> 4 mononuclear cells/tubular cross section or group of 10 tubular cells).

    Biopsy grade IB: Significant interstitial infiltration (> 25% of parenchyma) and foci of severe tubulitis (> 10 mononuclear cells/tubular cross section or group of 10 tubular cells).

    Biopsy grade IIA: Mild to moderate intimal arteritis. Biopsy graded IIB: Severe intimal arteritis comprising > 25% of the lumenal area.

    Biopsy graded III: Transmural (full vessel wall thickness) arteritis and/or arterial fibrinoid change and necrosis of medial smooth muscle cells (with accompanying lymphocytic inflammation).

  16. Incidence (Number) of BPAR

    Time frame: M6 and M12 post transplantation

    A biopsy proven acute rejection (BPAR) is defined as a biopsy graded IA, IB, IIA, IIB or III as per 2005/2007 Banff histological classification system.

  17. Incidence (Number) of Participants With Graft Losses

    Time frame: M6 and M12 post transplantation

    If a participant underwent a graft nephrectomy, then the day of nephrectomy was considered as the day of graft loss.

Sponsors and collaborators

Lead sponsor

Novartis Pharmaceuticals

Industry

Registry information

Official study title

Prospective, Multicenter, Randomized Open Study to Evaluate the Progression of Renal Graft Fibrosis According to the Epithelial-mesenchymal Transition (EMT) in de Novo Renal Transplant Recipients Treated Either by a CNI Free Immunosuppressive Regimen With Everolimus and Enteric-coated Mycophenolate Sodium or a CNI Based Regimen With Cyclosporine and Enteric-coated Mycophenolate Sodium

Acronym: CERTITEM

Important dates

Study start
2009
Primary completion
2012
Study completion
2012
First posted
Mar 2, 2010
Registry last updated
Mar 18, 2014

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

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This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.