Pre- and Postoperative Chemotherapy Including Bevacizumab in Potentially Curable Metastatic Colorectal Cancer
Pre- and Postoperative Chemotherapy Including Bevacizumab in Potentially Curable Metastatic Colorectal Cancer
Major attempt is being given to the potential of curing patients with metastatic colorectal
 cancer due to the recognition of dramatic change in survival figures achieved in palliative
 chemotherapy combination treatment protocols. Achieving resectablity rates in previously
 unresectable patients has been defined as study endpoint among other well known primary and
 secondary objectives. Curing metastatic colorectal cancer is most likely in resectable
 patients and therefore the logical next step after completion of chemotherapy combination
 studies (e.g. EORTC 40983) is the addition of targeted agents. Bevacizumab has the most valid
 data of improving outcome figures and was therefore chosen as additional agent. Safety of the
 combination with Xelox was demonstrated in the investigators pilot trial (Gruenberger JCO
 2006, ASCO 2006, WCGC 2006, ESMO 2006), consequently response rate and resection rate will be
 the primary endpoints in this trial.

 STUDY OBJECTIVES

 Primary Objective The primary objective of this study is the Resectability (R0) rate after
 neoadjuvant Bevacizumab in potentially resectable mCRC.

 Secondary Objectives The secondary objectives of this study include

 -  Feasibility with regards to GI bleeding and wound healing complications after surgery of
 liver metastases

 -  General safety

 -  Overall Response Rate (ORR)

 -  Recurrence Free Survival (RFS)

 -  Overall Survival (OS)

 STUDY DURATION Recruitment is planned for 12 months. Patients will be treated for 6 cycles
 XELOX and 5 cycles Bevacizumab. Surgery will be performed 2 weeks after the last Capecitabine
 administration, allowing a time window of 5 weeks between the last Bevacizumab administration
 and surgery.

 Therapy with 6 cycles of XELOX and Bevacizumab will be restarted 4-5 weeks after surgery.

 With a Follow up period of 2 years after the last enrolled patient, in order to assess RFS
 and OS, the trial will last for approx. 3 years.

 NUMBER OF CENTRES Four centres with a high level of experience in the surgery of liver
 metastases are planned to participate in this study.

 SELECTION CRITERIA

 Total Number of Patients and Target Population The planned total sample size for this study
 is 43 patients. Patients with potentially resectable metastatic colorectal cancer previously
 untreated for metastatic disease will be enrolled in this trial.
Major attempt is being given to the potential of curing patients with metastatic colorectal
 cancer due to the recognition of dramatic change in survival figures achieved in palliative
 chemotherapy combination treatment protocols. Achieving resectablity rates in previously
 unresectable patients has been defined as study endpoint among other well known primary and
 secondary objectives. Curing metastatic colorectal cancer is most likely in resectable
 patients and therefore the logical next step after completion of chemotherapy combination
 studies (e.g. EORTC 40983) is the addition of targeted agents. Bevacizumab has the most valid
 data of improving outcome figures and was therefore chosen as additional agent. Safety of the
 combination with Xelox was demonstrated in our pilot trial (Gruenberger JCO 2006, ASCO 2006,
 WCGC 2006, ESMO 2006), consequently response rate and resection rate will be the primary
 endpoints in this trial.

 STUDY OBJECTIVES

 Primary Objective The primary objective of this study is the Resectability (R0) rate after
 neoadjuvant Bevacizumab in potentially resectable mCRC.

 Secondary Objectives The secondary objectives of this study include

 -  Feasibility with regards to GI bleeding and wound healing complications after surgery of
 liver metastases

 -  General safety

 -  Overall Response Rate (ORR)

 -  Recurrence Free Survival (RFS)

 -  Overall Survival (OS)

 STUDY DURATION Recruitment is planned for 12 months. Patients will be treated for 6 cycles
 XELOX and 5 cycles Bevacizumab. Surgery will be performed 2 weeks after the last Capecitabine
 administration, allowing a time window of 5 weeks between the last Bevacizumab administration
 and surgery.

 Therapy with 6 cycles of XELOX and Bevacizumab will be restarted 4-5 weeks after surgery.

 With a Follow up period of 2 years after the last enrolled patient, in order to assess RFS
 and OS, the trial will last for approx. 3 years.

 NUMBER OF CENTRES Four centres with a high level of experience in the surgery of liver
 metastases are planned to participate in this study.

 SELECTION CRITERIA

 Total Number of Patients and Target Population The planned total sample size for this study
 is 40 patients. Patients with potentially resectable metastatic colorectal cancer previously
 untreated for metastatic disease will be enrolled in this trial.

 STUDY DESIGN

 Design This is a single arm, multicenter Phase I/II trial to evaluate the Resectability (R0)
 rate after neoadjuvant Bevacizumab in combination with a biweekly regime of capecitabine plus
 oxaliplatin (XELOX) in potentially resectable mCRC.

 The pre-operative treatment phase consists of 6 cycles XELOX and 5 cycles Bevacizumab. The
 cycle duration is 2 weeks.

 Surgery will be performed 2 weeks after the last administration of Capecitabine, allowing a
 time window of 5 weeks between the last dose of Bevacizumab and surgery.

 The post-operative treatment phase consists of 6 cycles XELOX + Bevacizumab and will be
 re-started 4-5 weeks after surgery.

 Patients will be further followed for tumour progression and survival for a further 2 years
 after the last patient has been enrolled in this trial (end of the study follow up).

 Schedule of Assessment and Study Procedures Study assessments and procedures will be
 performed as shown in Table 1 and 2. Screening and Baseline Written informed consent must be
 obtained prior to the patient undergoing any study-specific procedures.

 1. Tumor assessments: abdominal and pelvic CT / MRI and chest CT / MRI may be obtained up
 to 4 weeks prior to enrollment.

 2. Assessments to be made up to 14 days before enrollment include: demographic data,
 medical history, cancer/treatment history, concomitant disease/treatment, physical
 examination (including basic neurologic exam by investigator), electrocardiogram (ECG)
 and CEA, CA 19-9 determination.

 3. Assessments to be made within 7 days before enrollment: height, weight, vital signs
 (body temperature, blood pressure, and pulse/heart rate), ECOG Performance Status,
 hematology, blood chemistry (including creatinine clearance calculation), INR & aPTT,
 serum pregnancy test (for all women less than 2 years amenorrheic), dipstick urinalysis
 for proteinuria, and 24-hour urine collection for determination of total protein (if
 necessary).

 4. Urine pregnancy test is required prior to first administration of study treatment if
 more than 7 days have elapsed from baseline serum pregnancy test.

 If a Central Venous Access Device (CVAD) is required, at least a 2-day interval between
 placement of a central line and first bevacizumab administration is recommended.

 Treatment Phase (pre- and post-operative) Standard Clinical Assessments

 -  Physical examination (including basic neurologic exam by investigator)

 -  ECOG performance status (see Appendix 4)

 -  Vital signs [weight, body temperature, blood pressure, pulse/ heart rate]

 -  On each (scheduled) visit, patients will be assessed for adverse events (grading by the
 common terminology criteria for adverse events (CTCAE version 3.0).

 Laboratory Assessments

 The following laboratory tests are to be done:

 -  White blood cell count with differentials (lymphocytes, neutrophils), red blood cell
 count, hemoglobin, hematocrit and platelet count

 -  Bilirubin (total and direct), ASAT, ALAT, alkaline phosphatase, albumin, LDH

 -  Serum creatinine

 -  Glucose

 -  Electrolytes (sodium, potassium)

 -  Calcium

 -  INR (for patients receiving oral anticoagulant treatment)

 -  CEA, CA 19-9

 -  Urinalysis: dip stick test for protein is to be performed before each administration of
 bevacizumab.

 -  Serum pregnancy tests (if clinically indicated)

 Surgery and Control Visits after Surgery

 The first control visit should be performed 10 days after surgery and should include the
 following assessments:

 -  ECOG performance status

 -  Vital signs [weight, body temperature, blood pressure, pulse/ heart rate]

 -  Haematology, Blood chemistry and Coagulation

 -  Adverse events (grading by the common terminology criteria for adverse events (CTCAE
 version 3.0) with special regard to wound healing

 The second control visit will be performed 21 days after surgery and should include the same
 assessments as on the first control visit with the addition of:

 -  Physical examination

 -  Electrocardiogram (ECG)

 -  Tumour Assessment

 Final Visit End of treatment safety visit to be performed 28 days after the last drug
 administration.

 Follow up Phase and Termination of Study Progression Free Survival Status and Survival status
 should be assessed every 3 months for a maximum of 2 years.

 STUDY MEDICATION

 Dose, Schedule and Administration Bevacizumab Bevacizumab will be given at 5 mg/kg on d1
 every two weeks, for 5 consecutive cycles. The 6th cycle will be XELOX without Bevacizumab,
 allowing for a time window between last administration of Bevacizumab and surgery of 5 weeks.

 The time window between surgery and re-start of treatment will be at least 4 weeks and wound
 healing must be completed. Bevacizumab will then be given at 5 mg/kg on d1 every two weeks,
 for 6 consecutive cycles in combination with XELOX.

 Bevacizumab doses will be calculated for each patient in milligrams per kilogram. The
 patient's actual weight from the screening visit will be the reference weight throughout the
 study (i.e., patients will receive the same dose at each treatment). Doses of Bevacizumab
 will be recalculated for patients who experience more than 10% change in body weight from
 baseline during the treatment period.

 All patients will receive an infusion of study drug in a total volume of 100 mL of 0.9%
 Sodium Chloride Injection, USP. Bevacizumab infusions should not be administered or mixed
 with dextrose or glucose solutions.

 The initial study drug dose will be delivered over 90 minutes as a continuous IV infusion. If
 the first infusion is tolerated without infusion associated adverse events the second
 infusion may be delivered over 60 minutes. If the 60 minute infusion is tolerated, all
 subsequent infusions may be delivered over 30 minutes. If a patient experiences infusion
 associated adverse events with the 60 minute infusion, all subsequent doses will be given
 over 90 minutes. If a patient experiences infusion associated adverse events with the 30
 minute infusion, all subsequent doses will be given over 60 minutes.

 Should extravasation of the study drug infusion occur, the following steps are to be taken:

 1. Discontinue the IV.

 2. If a significant volume of the study drug infusion remains, restart the IV at a more
 proximal site in the same limb

 3. Treat the infiltration according to institutional guidelines for infiltration of a
 noncaustic agent.

 In the pre-surgery phase, Bevacizumab will be obtained locally by prescription. After
 surgery, Bevacizumab will be supplied as glass vials with 4-mL fill, containing 100 mg (25
 mg/mL) or with 16-mL fill, containing 400 mg (25 mg/mL). Vials contain no preservative and
 are for single use only.

 Oxaliplatin Liquid Oxaliplatin will be given at 85 mg/m2 on d1 every two weeks, for 6
 consecutive cycles, before and after surgery.

 Liquid Oxaliplatin dose will be calculated using the body surface area (BSA) of the patient
 (see Appendix 2). The dose of oxaliplatin administered should be as close as possible to the
 calculated dose.

 Liquid Oxaliplatin administration does not require hyperhydration. In the event of
 extravasation, administration must be discontinued immediately.

 For nausea and vomiting, 5-HT3 antagonists with or without dexamethasone are strongly
 recommended for oxaliplatin-based chemotherapy.

 Liquid Oxaliplatin must be infused either by peripheral vein or central venous line over 2
 hours. The infusion line must be adequately flushed with 5% dextrose solution (D5W) between
 oxaliplatin infusion and the administration of any other drug.

 Liquid Oxaliplatin (Eloxatin®) will be obtained locally by prescription.

 Capecitabine The dose of Capecitabine is 1.500 mg/m2 twice daily from the evening of d1 until
 the morning of d8, followed by 1 week rest period. One treatment cycle consists of 2 weeks.
 Capecitabine will be given for 6 consecutive cycles, before and after surgery.

 The appropriate daily dose of capecitabine is identified by determination of the Body Surface
 Area (see Appendix 2 and 3).

 Capecitabine is to be administered orally within 30 minutes after the end of a meal
 (breakfast, dinner). Tablets should be swallowed with approximately 200 mL water (not fruit
 juices). The first dose of each cycle will be administered as the evening dose on day 1 and
 the last dose of each cycle is scheduled the morning of day 8, followed by a 7 day rest
 period.

 Capecitabine (Xeloda®) will be obtained locally by prescription.

 Study Treatment Duration In the pre-operative treatment phase 6 cycles of XELOX and 5 cycles
 of Bevacizumab will be administered, resulting in a total treatment duration of 12 weeks.

 Surgery will be performed 2 weeks after the last administration of Capecitabine.

 Post-operative treatment consists of 6 cycles XELOX + Bevacizumab and will re-start 4-5 weeks
 after surgery.
Inclusion Criteria:

 -  Patients with histologically confirmed diagnosis of metastatic CRC including
 potentially resectable liver metastases, untreated yet with chemotherapy for
 metastatic disease

 -  At least one measurable metastatic lesion (as per RECIST criteria)

 -  Prior adjuvant or neo-adjuvant chemotherapy/radiotherapy allowed

 -  ECOG performance status 0 or 1

 -  Signed written informed consent

 -  life expectancy greater than 3 months

 -  patients below 18 years of age

 -  Adequate haematological function: White blood count ≥ 3 x 1000/L with neutrophils ≥
 1.5 x 1000/L, platelet count ≥ 100 x 1000/L, and hemoglobin ≥ 5.6 mmol/L (9g/dL)

 -  Adequate liver function: Total bilirubin ≤ 1.5 x upper limit of normal (ULN) range,
 alkaline phosphatase, Aspartate aminotransferase (ASAT) and Alanin aminotransferase
 (ALAT) ≤ 5 x ULN

 -  Serum creatinine ≤ 1.25 ULN and/or creatinine clearance ≥ 60 ml/min

 -  Urine dipstick of proteinuria <2+. Patients discovered to have 2+ proteinuria on
 dipstick urinalysis at baseline, should undergo a 24-hour urine collection and must
 demonstrate 1 g of protein/24 hr

 -  INR ≤ 1.5 and PTT ≤ 1.5 x ULN within 7 days prior to enrolment

 -  Women of childbearing potential must have a negative serum pregnancy test done 1 week
 prior to the administration of the study drug. She and her partner should prevent
 pregnancy (oral contraceptives, intrauterine contraceptive device, barrier method of
 contraception in conjunction with spermicidal jelly or surgically sterile) up to at
 least 6 months after last treatment completion or the last drug dose, whatever happens
 first.

 -  Patient must be able to comply with the protocol

 Exclusion Criteria

 -  Extrahepatic disease, except concurrent diagnosis of primary CRC

 -  Prior chemotherapeutic treatment for metastatic CRC

 -  Serious, non healing wound, ulcer, or bone fracture.

 -  Major surgical procedure, open biopsy or significant traumatic injury within 28 days
 prior to treatment,

 -  Evidence of any other disease, metabolic dysfunction, physical examination finding or
 laboratory finding giving reasonable suspicion of a disease or condition that
 contraindicates the use of an investigational drug or puts the patient at high risk
 for treatment-related complications

 -  Lack of physical integrity of the upper gastro-intestinal tract, malabsorption
 syndrome, or inability to take oral medication

 -  Pregnancy (absence to be confirmed by ß-HCG test) or lactation

 -  Men of childbearing potential not willing to use effective means of contraception

 -  Previous exposure to anti-VEGF antibodies

 -  Treatment with any investigational agent(s) within 4 weeks prior to study entry

 -  Known allergic/hypersensitivity reaction to any of the components of study treatments

 -  Clinically significant cardiovascular disease, for example CVA (6 months before
 treatment start), myocardial infarction (6 months before treatment start), unstable
 angina, NYHA grade 2 CHF, or uncontrolled hypertension.

 -  History of significant neurologic or psychiatric disorders including dementia,
 seizures, bipolar disorder

 -  Medical or psychological condition that would not permit the patient to complete the
 study or sign informed consent

 -  Known alcohol or drug abuse

 -  Clinical or radiological evidence of CNS metastases.

 -  Past or current history (within the last 2 years prior to treatment start) of other
 malignancies except metastatic colorectal cancer (Patients with curatively treated
 basal and squamous cell carcinoma of the skin or in situ carcinoma of the cervix are
 eligible).

 -  History of thromboembolic or haemorrhagic events within 6 months prior to treatment.

 -  Evidence of bleeding diathesis or coagulopathy

 -  Current or recent (within 10 days prior to study treatment start) ongoing treatment
 with anticoagulants for therapeutic purposes i.e. except for anticoagulation for
 maintenance of patency of permanent indwelling IV catheters.

 -  Chronic daily treatment with aspirin (> 325 mg/day) or clopidogrel (>75 mg/day).

 -  Chronic daily treatment with corticosteroids (dose of 10 mg/day methylprednisolone
 equivalent) (excluding inhaled steroids).

 -  Any other serious or uncontrolled illness which, in the opinion of the investigator,
 makes it undesirable for the patient to enter the trial

 -  gastrointestinal ulceration

 -  Known peripheral neuropathy NCI CTC Grade 1. Absence of deep tendon reflexes (DTRs) as
 the sole neurological abnormality does not render the patient ineligible