Multiple myeloma is the second most common hematologic malignancy in adults, and no curative treatment currently exists. With the development of monoclonal antibodies for tumor therapy, identifying tumor-specific biomarkers has become a prerequisite for pre- and post-treatment evaluation. CD38, which is abnormally elevated in 95% to 100% of malignant plasma cells but relatively low in normal cells, serves as a biomarker for multiple myeloma. In clinical practice, CD38 expression is typically detected through flow cytometry and microscopic examination of bone marrow biopsy samples. However, biopsies are invasive and prone to false-negative results in cases of heterogeneity or small lesion samples, whereas whole-body imaging methods allow non-invasive assessment of target expression. \[¹⁸F\]FDG PET/CT imaging is one of the most commonly used techniques in multiple myeloma. However, its diagnostic application is limited by false-negative results due to low hexokinase 2 expression in myeloma cells. Additionally, it fails to provide accurate molecular information, such as CD38 expression in cells. Therefore, this study aims to develop a more specific and stable molecular imaging probe, ⁶⁸Ga-NOTA-SCH001, to non-invasively visualize CD38 expression and monitor responses to CD38-targeted therapy in real time. This approach may also contribute to the formulation and optimization of clinical treatment strategies.
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PET/CT imaging SUV value
Timeframe: 0-30minutes、60minutes、120minutes