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hMe-Seal is a low-input whole-genome cell-free 5hmC sequencing method based on selective chemical labeling. It uses β-glucosyltransferase (βGT) to selectively label 5hmC with a biotin via an azide-modified glucose for pull-down of 5hmC-containing DNA fragments for sequencing. After selectively constructing 5hmC library, highthroughput-sequencing will be performed on an Illumina Nextseq-500 instrument. By ways of Rawdata processing, differential loci between Osteosarcoma group and control group will be detected to indentify specific epigenetic biomarkers of Osteosarcoma. From our previous trials, we identify geno sequencing related to beta-catenin pathways might have some relationship with osteosaroma primary or secondary drug resistance. Thus in this trial we try to further explore the drug resistance mechanism for advaced osteosarcoma second resistance to the combination therapy of Famitinib and Camrelizumab.
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Inclusion and exclusion criteria
Subjects can be enrolled in this study only when they meet all the inclusion criteria:
Provided informed consent and sign the informed consent form;
≥12 years old for male and ≥ 11 years old for female;
Histopathologically or cytologically confirmed Advanced Osteosarcoma; (Local tumors and solitary pulmonary lesions must be confirmed by pathological diagnosis. Multiple pulmonary metastases need no pathological examination.)
Failed to receive chemotherapy for osteosarcoma (including HD-MTX, anthracyclines, DDP and IFO) are defined as those who progress within 6 months after adjuvant chemotherapy and chemotherapy for advanced osteosarcoma, and those who progress over 6 months require the consent of the subject or his legal representative.;
Have at least one measurable lesion (in accordance with RECIST v1.1, major diameter ≥10 mm of the measurable lesion in spiral CT scan or short diameter of swollen lymph node ≥15 mm; the lesion with previous local therapy can be used as target lesion after the progression is confirmed in accordance with RECIST v1.1);
For subjects with progression after local regional therapy, the local regional therapy (including but not limited to surgery, radiotherapy, hepatic artery embolization, TACE, hepatic arterial infusion, radiofrequency ablation, cryoablation or percutaneous ethanol injection) must has been completed at least 4 weeks prior to baseline radiological scanning, and any toxicity (except alopecia) induced by local regional therapy must have resolved to ≤ Grade 1 in accordance with national cancer institute - common terminology criteria for adverse event version 4.03 (NCI-CTCAE v4.03);
ECOG-PS score 0-1;
With a life expectancy of ≥12 weeks;
Have the required screening laboratory values including the following parameters (within 7 days prior to the start of study treatment):
(1) Hematology: (except for hemoglobin, no blood transfusion or use of granulocyte colony-stimulating factor [G-CSF] or use of drugs for correction within 14 days prior to screening); Absolute neutrophil count ≥0.75×109/L; Platelet count ≥75×109/L; Hemoglobin ≥80 g/L; (2) Blood biochemistry: (no infusion of albumin within 14 days): Serum albumin ≥25 g/L; Serum total bilirubin ≤1×upper limit of normal (ULN); Alanine aminotransferase (ALT), aspartate aminotransferase (AST) and alkaline phosphatase (AKP) ≤2.5×ULN; Serum creatinine (Cr) ≤1.5×ULN or Cr clearance >50 mL/min (Cockcroft-Gault formula as below) Man: Cr clearance =((140-age) ×weight)/(72×serum Cr) Woman: Cr clearance =((140-age) ×weight)/ (72×serum Cr) × 0.85 Weight unit: kg; serum Cr unit: mg/mL;
Women of childbearing potential: must agree on abstinence (avoid heterosexual intercourse) or use of contraception methods with annual contraceptive failure rate of < 1 percentage following the signature of informed consent form untill at least 120 days after the last dose of study drug. The serum human chorionic gonadotropin (HCG) test must be negative within 7 days prior to enrollment in the study; and the subjects must not be in lactating period.
If the female subject has menses, has not reached postmenopausal state (absence of menses for ≥ consecutive 12 months, with no other reason found except menopause) and has not received sterilization operation (e.g., hysterectomy, bilateral tubal ligation or bilateral ovariectomy), she would be considered to have childbearing potential.
Subjects who meet any one of the following criteria must not be enrolled in this study:
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Central trial contact
Jie Xu, M.D.; Lu Xie, M.D.
Data sourced from clinicaltrials.gov
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