A Study on Ivonescimab Plus Chemotherapy as Neoadjuvant Therapy for Borderline Resectable Pancreatic Cancer

Inclusion Criteria:

1. Age ≥ 18 years and ≤ 75 years.

2. Histologically or cytologically confirmed pancreatic cancer.

3. Borderline resectable disease.

4. At least one measurable lesion (according to RECIST v1.1); and tumor diameter ≤ 6cm, distance from the gastrointestinal mucosa ≥ 0.5 cm with no obvious signs oftumor invasion, and no obvious lymph node metastasis.

5. No prior anti-tumor treatment for pancreatic cancer.

6. ECOG performance status of 0-1.

7. Life expectancy of ≥3 months.

8. Hematologic function: Absolute neutrophil count (ANC) ≥1.5×10⁹/L, platelets (PLT) ≥100×10⁹/L, hemoglobin (Hb) ≥90 g/L, white blood cells (WBC) ≥3.0×10⁹/L.

9. Liver function: Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) ≤2.5×ULN; total bilirubin ≤1.5×ULN.

10. Renal function: Serum creatinine (Cr) ≤1.5×ULN or creatinine clearance ≥60 ml/min (calculated by Cockroft-Gault formula).

11. Subjects with reproductive potential must use at least one medically acceptedcontraceptive method (such as intrauterine device, oral contraceptives, or condoms)during the study treatment period and for 180 days after the end of study treatment.Female subjects must have a negative serum HCG test before the first dose and mustnot be breastfeeding.

12. Ability to understand the nature of the study, and the patient (or legalrepresentative) voluntarily agrees to participate in the trial and signs theinformed consent form.

Exclusion Criteria:

1. Patients who have had other malignancies within the past 5 years (except for curedin situ cancer and basal cell carcinoma of the skin).

2. Undergone major surgery within the past 28 days.

3. Previously received immunotherapy drugs (including anti-PD-1, anti-PD-L1,anti-PD-L2, anti-CTLA-4, etc.).

4. Presence of distant metastases that are not resectable.

5. Active, uncontrolled bacterial, viral, or fungal infections requiring systemictreatment, defined as persistent signs/symptoms related to infection that have notimproved despite appropriate antibiotics, antiviral therapy, and/or othertreatments.

6. Known active HIV infection (i.e., positive for HIV 1/2 antibodies); untreated activeHBV (defined as HBsAg positivity with detectable HBV-DNA ≥10⁴/ml or 2000 IU/ml) andHCV infection (positive HCV antibodies with HCV-RNA levels above the upper limit ofnormal).

7. Presence of uncontrollable systemic diseases (such as a history of cardiovasculardiseases like unstable angina, myocardial infarction, congestive heart failure,severe unstable ventricular arrhythmias, or severe pericardial disease).

8. Presence of severe gastrointestinal diseases (including active bleeding, obstructiongreater than Grade 1 [CTCAE v5.0], or diarrhea greater than Grade 1 [CTCAE v5.0]).

9. Any contraindications to chemotherapy, radiotherapy, or surgery as indicated bylaboratory or clinical findings.

10. Pregnant or breastfeeding women, and women of childbearing potential who refuse touse appropriate contraception during the trial.