SBRT Combined With Reduced-Dose Anthracycline Chemotherapy and Toripalimab as Neoadjuvant Therapy for Localized High-Risk Undifferentiated Pleomorphic Sarcoma (SPARK)
A Single-Arm Phase II Exploratory Study of Neoadjuvant Immunotherapy Plus Chemotherapy Plus SBRT Triplet Therapy and Postoperative Stratified Maintenance Therapy for Undifferentiated Pleomorphic Sarcoma
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
Undifferentiated pleomorphic sarcoma (UPS) accounts for 5-10% of soft tissue sarcomas. For localized high-risk UPS of the extremities, the standard of care is preoperative radiotherapy plus radical surgery; however, even with R0 resection, the risk of distant metastasis is 30-40% and 2-year disease-free survival is approximately 50%. The SARC028 study showed an objective response rate of 23% in UPS with pembrolizumab, and SU2C-SARC032 demonstrated that adding perioperative pembrolizumab to preoperative radiotherapy improved 2-year DFS (67% vs 52%, HR 0.61). Preclinical and clinical data suggest that stereotactic body radiotherapy (SBRT) with high dose per fraction better synergizes with immune checkpoint blockade than conventional fractionation; sparing the tumor-draining lymph nodes is critical for preserving immune priming.
This phase II study evaluates the triplet neoadjuvant regimen of SBRT, reduced-dose anthracycline chemotherapy, and toripalimab followed by postoperative stratified maintenance in patients with localized high-risk UPS. The fixed treatment schedule is: weeks 1-3 SBRT (8-10 Gy in 5 fractions, on alternate days or consecutively) plus first dose of toripalimab; week 4 first chemotherapy cycle plus second dose of toripalimab; weeks 5-6 recovery; week 7 second chemotherapy cycle plus third dose of toripalimab; weeks 8-9 recovery and response assessment; weeks 10-12 radical surgery. Postoperative maintenance begins within 4-8 weeks after surgery. Patients achieving MPR or HPR receive toripalimab monotherapy 240 mg every 3 weeks for up to 14 cycles; patients not achieving MPR/HPR receive toripalimab for 14 cycles combined with liposomal doxorubicin (2-4 cycles; 2 cycles for HPR >30%).
The sample size uses Simon's two-stage Minimax design with one-sided alpha of 0.05 and 80% power, assuming P0 = 60% and P1 = 80%. The first stage enrolls 13 patients (stop if <=8 responders); the second stage expands to 35 patients total (declare regimen ineffective if <=25 responders overall). Allowing for a 10% dropout rate, the planned total enrollment is 39 patients.
Efficacy assessment: pathologic response (MPR defined as <=10% residual viable tumor cells; HPR defined as >30% hyalinization) is evaluated using a standardized pathology SOP, with confirmation by an independent central pathology laboratory. Radiologic response is evaluated by RECIST v1.1 every 12 weeks. Safety: adverse events are graded per NCI CTCAE v5.0; all adverse events are recorded up to at least 100 days after the last dose. Major wound complications are monitored within 90 days after surgery. Follow-up: visits at 30 days and 84 days after surgery, then every 3 months for survival; imaging every 12 weeks in the first year, every 24 weeks in the second year, and every 6-12 months in years 3-5; ctDNA and peripheral blood immune monitoring every 3 months for at least 2 years.
Undersøgelsestype
Undersøgelsestype
Tilmelding (Anslået)
Tilmelding
Fase
Fase
- Fase 2
Kontakter og lokationer
Studiekontakt
Studiekontakt
- Navn: Jilong Yang
- Telefonnummer: +86-18622221626
- E-mail: yangjilong@tjmuch.com
Studiesteder
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Tianjin, Kina
- Tianjin Medical University Cancer Institute & Hospital
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Kontakt:
- Jilong Yang
- Telefonnummer: +86-18622221626
- E-mail: yangjilong@tjmuch.com
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Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
- Voksen
- Ældre voksen
Tager imod sunde frivillige
Beskrivelse
Inclusion Criteria:
Inclusion Criteria:
- Male or female, aged 18 to 75 years.
- Histologically confirmed UPS, screened locally and confirmed by central pathology before enrollment. Adequate IHC (at least CK, S100, SOX10, SMA, desmin, MDM2, CDK4) and NGS when feasible (MDM2/CDK4 amplification mandatory) to exclude dedifferentiated liposarcoma and other differentiated tumors.
- UPS of extremities or trunk. Max diameter >5 cm, or <=5 cm with any of: encasement of major neurovascular bundle >180 degrees; expected limb functional loss >50% after resection; MDT deems R0 difficult. SBRT-feasible anatomy with >3 mm margin to critical neurovascular structures or joint.
- Regional nodes evaluated by imaging (US/CT/MRI/PET-CT). Suspicious nodes (short axis >=10 mm, abnormal morphology, or high FDG) require pathology. Uninvolved nodes must not be irradiated; involved nodes included with radical dose or resected.
- Treatment-naive: no prior chemotherapy, targeted therapy, immunotherapy, or local radiotherapy.
- At least one measurable lesion per RECIST v1.1.
- ECOG 0-1.
- Adequate organ function.
- Signed ICF, good compliance, willing to provide fresh tumor and blood for translational research.
Exclusion Criteria:
- Other malignancy, except completed treatment with no recurrence/metastasis within 2 years.
- Major surgery within 4 weeks, or systemic steroids (>10 mg/day prednisone equivalent) or immunosuppressants within 2 weeks.
- Active infection requiring systemic therapy; active HBV (DNA >=2000 IU/mL), HCV, syphilis, or HIV positive.
- Active or relapsing autoimmune disease.
- Severe comorbidity: NYHA >=III, ischemic heart disease, uncontrolled hypertension/diabetes; interstitial lung disease or severe pulmonary impairment.
- Known active brain metastases.
- Pregnancy/breastfeeding, or refusal of effective contraception.
- Any investigator-judged risk to safety or completion.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Behandling
- Tildeling: N/A
- Interventionel model: Enkelt gruppeopgave
- Maskning: Ingen (Åben etiket)
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
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Eksperimentel: Experimental Arm
Single-arm.
All enrolled patients receive triplet neoadjuvant therapy: SBRT (8-10 Gy in 5 fractions, alternate days or consecutively) first, with concurrent toripalimab (240 mg IV q3w, 3 neoadjuvant cycles) plus liposomal doxorubicin (30-40 mg/m2 IV q3w, 2 neoadjuvant cycles).
Radical surgery at weeks 10-12.
Postoperative stratified maintenance within 4-8 weeks: MPR/HPR -> toripalimab 240 mg q3w up to 14 cycles; non-MPR/HPR -> toripalimab q3w 14 cycles plus liposomal doxorubicin 2-4 cycles (2 cycles if HPR >30%).
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Toripalimab 240 mg IV q3w; 3 neoadjuvant doses from SBRT start; maintenance up to 14 cycles until progression, death, or unacceptable toxicity.
Liposomal doxorubicin 30-40 mg/m2 IV q3w; 2 neoadjuvant cycles.
Non-MPR/HPR: 2-4 adjuvant cycles (2 cycles if HPR >30%).
SBRT 8-10 Gy x 5 (median 8 Gy x 5), over 5-10 days in weeks 1-3, IGRT required.
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Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Tidsramme |
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Rate of Major Pathologic Response (MPR)
Tidsramme: At surgery
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At surgery
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Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Tidsramme |
|---|---|
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Rate of Hyalinized Pathologic Response (HPR)
Tidsramme: At surgery
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At surgery
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Objective Response Rate (ORR)
Tidsramme: After completion of neoadjuvant therapy, before surgery (approximately weeks 8-9 after enrollment)
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After completion of neoadjuvant therapy, before surgery (approximately weeks 8-9 after enrollment)
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R0 Resection Rate
Tidsramme: At surgery
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At surgery
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Limb Salvage Rate
Tidsramme: At surgery
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At surgery
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Adverse Events
Tidsramme: From the first dose of study treatment until at least 100 days after the last dose
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From the first dose of study treatment until at least 100 days after the last dose
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Datoer for undersøgelser
Studer store datoer
Studiestart (Anslået)
Studiestart
Primær færdiggørelse (Anslået)
Primær færdiggørelse
Studieafslutning (Anslået)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
- Neoplasmer
- Neoplasmer efter histologisk type
- Sarkom
- Neoplasmer, bindevæv og blødt væv
- Neoplasmer, bindevæv
- Neoplasmer, fibrøst væv
- Histiocytom
- Histiocytom, ondartet fibrøst
- Undersøgelsesteknikker
- Terapeutik
- Kirurgiske procedurer, operative
- Strålebehandling
- Stereotaksiske teknikker
- Neurokirurgiske procedurer
- Toripalimab
- Radiokirurgi
- Liposomal doxorubicin
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- SPARK-UPS-01
- E20261130 (Anden identifikator: Tianjin Medical University Cancer Institute & Hospital Medical Ethics Committee)
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
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