Pharmacokinetics and Tolerancebility Studies of Gentuximab Injection in the Treatment ofPatients With Late Recurrence of Metastatic Solid Tumors in China

The primary objective is to evaluate the safety and, tolerabilitytolerance, pharmacokinetices and immunogenicity of escalating single doses and subsequent multiple dose of Gentuximab Injection in patients with late recurrence of metastatic solid tumors and to determine the maximum tolerated dose（MTD） and dose limiting toxicities（DLT）.with single and subsequent multiple intravenous infusion in patients with late recurrence of metastatic solid tumors and to provide a basis for the protocol design of later clinical trials.

The secondary objective is to evaluate the pharmacokinetics, pharmacodynamics and immunogenicity, and tumor response of multiple dose of Gentuximab Injection in patients with late recurrence of metastatic solid tumors.

The safety profile of Gentuximab Injection will be explored together with the pharmacokinetics, pharmacodynamics and tumour response to treatment with Gentuximab Injection to recommend the dosing regimen for further clinical studies. The pharmacokinetic properties of Gentuximab Injection will be evaluated after single and multiple dose administrations at different dose levels.

Eligibility Criteria:
Inclusion Criteria:

* Male or female. aged between 18 and 75 years.
* Participants with histopathologically or cytologically diagnosed advanced or metastatic malignant solid tumor.
* Did not respond to standard therapy or no standard therapy is available.
* At least one Measurable lesion.
* At least 4 weeks after the last chemotherapy (at least 14 days from the last medication with oral fluorouracil drugs), at least 6 weeks after the last medication with mitomycin C and nitrosourea; wait for at least a elution periods for 5 half-life if anti-tumor biological products are dosed.
* The subject should restore to ≤1 level (NCI-CTCAE4.03) if they have toxicity response caused by previous treatment, except hair loss.
* Performance status (PS) score, ECOG0-1 level.
* A life expectancy of \>3 months.
* Adequate hematologic function, as defined by: Absolute neutrophil count (ANC) ≥1.5×109/L; hemoglobin concentration ≥90g/L (allowing blood transfusion); and platelet count ≥100×109/L.
* Adequate hepatic function, as defined by: ALT ≤ 2.5 × ULN, AST ≤ 2.5 × ULN, TBIL ≤ 1.5 × ULN (liver metastases patients ALT ≤ 5 × ULN, AST ≤ 5 × ULN, TBIL ≤ 3 × ULN).
* Adequate renal function, as defined by: serum creatinine level≤ 1.5 × ULN, creatinine clearance ≥ 60ml / min.
* Adequate coagulation function, as defined by: International normalized ratio (INR) ≤1.5× ULN, activated partial thromboplastin time (aPTT) ≤1.5 x ULN.
* Qualified subjects (male and female) who have fertility must agree to use reliable contraceptive methods (hormones or barriers or abstinence) during the trial and at least 12 weeks after the last administration. Female in childbearing age must be negative for blood pregnancy test within 7 days prior to enrollment.
* Subjects should be informed of the study prior to trial and voluntarily signed a written informed consent.
* The subject is able to communicate well with the investigator and be able to complete the study in accordance with the study.

Exclusion Criteria:

* Subject who has HIV infection, active hepatitis B, hepatitis C or syphilis infection.
* Subject is histologically confirmed as lung squamous cell carcinoma or squamous cell carcinoma of the head and neck, or subjects with lung metastases and metastases with the void ，or bleeding tendency or risk which researchers conformed.
* Has known alcohol or drug dependency.
* Has participated in a clinical study of a non-approved experimental agent within 4 weeks prior to study entry.
* Have serious infection need antibiotic therapy by intravenous injection .
* Has documented and/or symptomatic brain or leptomeningeal metastases.
* Has urinary protein prior to study entry (urinary protein ≥1+，need to detection 24h urinary protein，if 24h urinary protein≥1g,then entry not allowed）.
* Has a history of abdominal fistula, gastrointestinal perforation, or intra-abdominal abscess \<6 months before study entry.
* Has a serious or nonhealing wound, ulcer, or bone fracture.
* Has undergone major surgery within 28 days before study entry (not including needle biopsy) or have had significant trauma.
* Has active bleeding within 3 months before enrollment.
* Venous thrombosis currently required treatment; myocardial infarction, stroke, or other severe arterial thromboembolic events occurred within 6 months before enrollment.
* Using anticoagulation and antiplatelet drugs.
* Left ventricular ejection fraction ≤ 50%, New York Heart Association (NYHA) Grade II and above heart failure, uncontroled hypertension (systolic blood pressure\> 140 mmHg and/ or diastolic blood pressure\> 90 mmHg after treatment with a drug) .
* Is pregnant (confirmed by urine or serum pregnancy test) or lactating.
* Has a known serious allergy reaction to recombination monoclonal antibody (MAb) drug, ,or infusion reaction.
* Is not considered to be suitable for this study, in the opinion of the investigator.