OsteosarcomaNCT07593573
the Exploration of MTAP Deletion in Osteosarcoma by Immunohistochemistry
An observational study of Osteosarcoma and MTAP Deletion, run by Peking University People's Hospital at 1 site in China.
Trial summary
MTAP deletion frequently occurs in osteosarcoma, and PRMT5 has been identified as a synthetic lethal target for cancers with homozygous deletion of the MTAP gene, making it a promising target for anti-tumor drug development.This study aims to evaluate the overall status of MTAP deficiency in the tissues of… Read more about this study
- Who is it for?
- Ages 12 to 65 years
- Conditions the study is for
- Osteosarcoma, MTAP Deletion, Immunohistochemistry
- How many people
- 100 participants
- Where
- 1 siteChina
- Study dates
- 15 Dec 2025to 14 Dec 2026
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 12 to 65 years
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
Study population: Initial treated osteosarcoma patients in PKUPH and later would recieve definitive surgery in PKUPH with complete clinical materials.
Who may be able to join
- advanced recurrent and refractory osteosarcoma confirmed by histopathology;
- initial treatment in the Orthopedic/Oncology Departments of Peking University People's Hospital or Peking University Shougang Hospital;
- progression less than 6 months after first-line chemotherapy with a combination of high-dose methotrexate, doxorubicin, cisplatin and ifosfamide (first-line chemotherapy);
- measurable lesions according to the Response Evaluation Criteria for Solid Tumors (RECIST 1.1) ;
- Eastern Cooperative Oncology Group performance status ≤ 1 ;
- acceptable haematologic, hepatic, and renal function.
Who cannot join
- those who had been previously treated with antiangiogenic TKIs and single IE chemotherapy;
- those who had severe or uncontrolled medical disorders that could jeopardize the outcomes of the study. These confounding conditions included, cardiac clinical symptoms or disease with left ventricular ejection fraction<50%, and hypertension that could not be well controlled with antihypertensive drugs.;
- all patients were assessed by the sarcoma board including a thoracic surgeon with at least 10 years surgical experience. Patients with lung metastases only were carefully assessed for eligibility for metastasectomy, of whom those who were suitable for surgery were excluded from this study;
- weight loss of 20% or more before illness;
- brain or leptomeningeal metastasis;
- surgical procedure or radiotherapy within 4 weeks of enrollment;
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- activegastroduodenal ulcer, previous condition associated with risk of bleeding or requiring anticoagulation;
- proteinuria or hematuria, denutrition with albuminemia <25 g/L;
- women who were pregnant or breast feeding, other malignancy;
- positive HBV/HCV/HIV serology, and known allergy to the experimental agents.
Trial locations and contacts
1 site in 1 country.
China1 site
Peking University People's Hospital
Beijing, Beijing Municipality, 100044
About this study
Official title: A Clinical Study on the Exploration of MTAP Deletion in Osteosarcoma Specimens by Immunohistochemistry
MTAP deletion frequently occurs in osteosarcoma, and PRMT5 has been identified as a synthetic lethal target for cancers with homozygous deletion of the MTAP gene, making it a promising target for anti-tumor drug development.This study aims to evaluate the overall status of MTAP deficiency in the tissues of osteosarcoma patients and its correlation with clinical features such as metastasis and immune subtypes by examining the MTAP protein expression levels in previous histological samples of the patients and combining this with their clinicopathological data.
- Conditions
- Osteosarcoma, MTAP Deletion, Immunohistochemistry
- Medical subject headings
- Osteosarcoma
What is being measured
The primary outcome is the main question the study is designed to answer.
Progression free survival
from the start of target treatment until disease progression or death, whichever came first.
Measured: 2 years
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted18 May 2026
- Study start15 Dec 2025
- Primary completion15 Jun 2026 (estimated)
- Study completion14 Dec 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for OsteosarcomaStudies of the same condition, open and under way.
- More trials run by Peking University People's HospitalThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Retrospective
- Enrolment
- 100 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Peking University People's Hospital
- Sponsor type
- University, hospital or other
- Collaborators
- Sailan(Hangzhou)Biopharmaceutical Technology Co.,Ltd.
- Responsible party
- Principal investigator, Xie Lu, Peking University People's Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07593573
- Sponsor's protocol ID
- PKUPH-sarcoma 23
- Status last verified
- Dec 2025
- First submitted
- 12 May 2026
- Last updated
- 18 May 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 18 May 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Clinical Study on the Exploration of MTAP Deletion in Osteosarcoma Specimens by Immunohistochemistry
- ClinicalTrials.gov ID
- NCT07593573
- Acronym / sponsor ID
- PKUPH-sarcoma 23
- Conditions
- Osteosarcoma, MTAP Deletion, Immunohistochemistry
- Study type
- Observational
- Recruitment status
- Active, not recruiting
- Enrolment
- 100 participants (estimated)
- Lead sponsor
- Peking University People's HospitalUniversity, hospital or other
- Collaborators
- Sailan(Hangzhou)Biopharmaceutical Technology Co.,Ltd.
- Study start
- 15 Dec 2025 (actual)
- Primary completion
- 15 Jun 2026 (estimated)
- Study completion
- 14 Dec 2026 (estimated)
- First posted
- 18 May 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
MTAP deletion frequently occurs in osteosarcoma, and PRMT5 has been identified as a synthetic lethal target for cancers with homozygous deletion of the MTAP gene, making it a promising target for anti-tumor drug development.This study aims to evaluate the overall status of MTAP deficiency in the tissues of osteosarcoma patients and its correlation with clinical features such as metastasis and immune subtypes by examining the MTAP protein expression levels in previous histological samples of the patients and combining this with their clinicopathological data.
Study design
- Observational model
- Cohort
- Time perspective
- Retrospective
Who may qualify
- Ages
- 12 to 65 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
- Study population
- Initial treated osteosarcoma patients in PKUPH and later would recieve definitive surgery in PKUPH with complete clinical materials.
Key inclusion criteria (6 listed)
- advanced recurrent and refractory osteosarcoma confirmed by histopathology;
- initial treatment in the Orthopedic/Oncology Departments of Peking University People's Hospital or Peking University Shougang Hospital;
- progression less than 6 months after first-line chemotherapy with a combination of high-dose methotrexate, doxorubicin, cisplatin and ifosfamide (first-line chemotherapy);
- measurable lesions according to the Response Evaluation Criteria for Solid Tumors (RECIST 1.1) ;
- Eastern Cooperative Oncology Group performance status ≤ 1 ;
Key exclusion criteria (10 listed)
- those who had been previously treated with antiangiogenic TKIs and single IE chemotherapy;
- those who had severe or uncontrolled medical disorders that could jeopardize the outcomes of the study. These confounding conditions included, cardiac clinical symptoms or disease with left ventricular ejection fraction<50%, and hypertension that could not be well controlled with antihypertensive drugs.;
- all patients were assessed by the sarcoma board including a thoracic surgeon with at least 10 years surgical experience. Patients with lung metastases only were carefully assessed for eligibility for metastasectomy, of whom those who were suitable for surgery were excluded from this study;
- weight loss of 20% or more before illness;
- brain or leptomeningeal metastasis;
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Progression free survival
Time frame: 2 years
from the start of target treatment until disease progression or death, whichever came first.
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 18 May 2026.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Osteosarcoma and MTAP Deletion, run by Peking University People's Hospital at 1 site in China.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 6 inclusion and 10 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: under way, not looking for participants, as of the sponsor's last update on 18 May 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in China. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Progression free survival (time frame: 2 years). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 18 May 2026; AzTrials last refreshed its copy on 8 Nov 2026.