5 × 10⁶ MDA‑MB‑468 cells (luciferase‑expressing) were implanted into the fourth mammary fat pad of female NOD‑SCID mice (6‑week old). Tumor volume was measured bi‑weekly by calipers (V = ½ L × W²). Mice were randomized (n = 10/group) to vehicle, JUQ‑565 (30 mg kg⁻¹ PO qd), carboplatin (50 mg kg⁻¹ i.p. q7d), or combination (JUQ‑565 + carboplatin). Treatment started when tumors reached ~100 mm³. Body weight and clinical signs were recorded throughout.