Apatinib for Advanced Soft Tissue Sarcoma Patients: a Phase 2, Multicenter Trial

Inclusion Criteria:

* Patients with a histologically and/or cytologically confirmed soft tissue sarcoma(rhabdomyosarcoma and liposarcoma excluded) who are resistant / refractory to approved therapies or for whom no curative therapies are available.
* All previous treatment (including surgery, radiotherapy and systemic anti-neoplastic therapy) must have been completed at least three weeks prior to study entry and any acute toxicities must have resolved.
* Aged \>/= 16 years.
* Eastern Cooperative Oncology Group (ECOG) performance status score of \</= 2.
* Written informed consent prior to any study specific screening procedures with the understanding that the patient may withdraw consent at any time without prejudice.
* Willing and able to comply with the protocol guidelines for the duration of the study.

Exclusion Criteria:

* Unstable metastases to the central nervous system (CNS).
* tumor embolus located at pulmonary vein.
* Any of the following laboratory parameters: a) hemoglobin \< 9 g/dL (5.6 mmol/L); b) neutrophils \<1.5 x 109/L; c) platelets \<100 x 109/L; d) serum bilirubin \>25 µmol/L (1.5 mg/dL); e) liver function tests with values \>3 x upper limit of normal (ULN) f) serum creatinine \>1.5 x ULN or creatinine clearance \< 60 mL/minute.
* Positive history of HIV, active hepatitis B or active hepatitis C or severe/uncontrolled intercurrent illness or infection
* Clinically significant cardiac impairment or unstable ischemic heart disease including a myocardial infarction within six months of study start
* Patients with marked Baseline prolongation of QT/QTc interval (QTc interval \> 450 msec for males or \> 470 msec for females) using the Fridericia method for QTc analysis
* Bleeding or thrombotic disorders, or using therapeutic dosages of anticoagulants, such as warfarin. Occasional use of NSAIDs and antiplatelet agents such as aspirin, clopidogrel, aggrenox and dipyridamole are not considered exclusionary only if INR\>1.5 or prothrombin time（PT）\>ULN+4s or activated partial thromboplastin time (APTT) \>1.5 ULN.
* Requirement for chronic use of full dose aspirin or non-steroidal anti-inflammatory drugs (NSAIDs)
* Poorly controlled hypertension (defined as requiring changes in any hypertensive regimen within 1 week of study entry) or patients diagnosed with hypertension based on repeat blood pressure measurements of \>160/90 mmHg at Screening
* Proteinuria \> 1+ on urine dipstick testing or 30 mg/dL
* A history of gastrointestinal malabsorption or having undergone surgery requiring gastrointestinal anastomoses within four weeks of starting therapy or who have not recovered from major surgery within three weeks of starting therapy History of alcoholism, drug addiction, or any psychiatric or psychological condition which, in the opinion of the Investigator, would impair study compliance.
* Any treatment with investigational drugs within 30 days before the start of the study
* Previous treatment with apatinib or other anti-angiogenesis tyrosine kinase inhibitors
* receive CYP3A4 inhibitors within 7 days or CYP3A4 inducers within 12 days.
* uncontrollable complicated diseases: such as infectious diseases, diabetes mellitus and so on.
* Women who are pregnant or breast-feeding; women of childbearing potential with a positive pregnancy test at Screening or no pregnancy test. Women of childbearing potential unless (1) surgically sterile or (2) using adequate measures of contraception (including two forms of contraception, one of which must be a barrier method) in the opinion of the Investigator. Perimenopausal women must be amenorrheic for at least 12 months to be considered of non-childbearing potential.
* Fertile males with female partners who are not willing to use contraception or whose female partners are not using adequate contraceptive protection
* Legal incapacity