细胞因子免疫疗法

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长江医药:药品产业链周度系列(二)再论细胞因子IL-2/12/15
Changjiang Securities· 2025-06-03 00:25
Investment Rating - The report maintains a "Positive" investment rating for the healthcare industry [10] Core Insights - Recent strategies in cancer immunotherapy focus on selectively delivering cytokines to tumor sites to extend their half-life and reduce systemic toxicity. This has led to the development of antibody-cytokine fusion proteins known as "immunocytokines," with significant potential in drug development. The most notable immunocytokines currently under development are IL-2, IL-12, and IL-15, with several domestic companies actively pursuing these therapies [2][6][24] Summary by Sections Immunocytokines and Their Development - Cytokine-based cancer immunotherapy aims to activate immune cells and enhance anti-tumor responses by modulating internal immune signaling. Commonly used cytokines include IL-2, IL-15, IL-12, and IFN-α, which can activate T cells and NK cells to improve tumor cell recognition and elimination [6][17] - The report highlights the emergence of a new strategy that selectively delivers cytokines to tumor sites, which has garnered clinical interest. This approach aims to enhance therapeutic efficacy while minimizing side effects [6][24] Domestic Company Developments - Several domestic pharmaceutical companies, including Innovent Biologics, Ascentage Pharma, and Junshi Biosciences, are making significant strides in the development of immunocytokine therapies. For instance, Innovent's IBI363, a novel PD-1/IL-2α-bias fusion protein, has shown promising clinical results in melanoma, colorectal cancer, and non-small cell lung cancer [7][44][48] - The report notes that IBI363 has demonstrated an overall response rate (ORR) of 26.4% in melanoma patients who previously failed immunotherapy, indicating its potential in treating resistant tumors [48] Market Outlook and Investment Opportunities - The macroeconomic environment has shifted, and by 2025, the report anticipates significant opportunities in the pharmaceutical sector driven by innovation and domestic demand recovery. Key investment themes include the international expansion of innovative drugs and the recovery of domestic healthcare services [8][67] - The report emphasizes the importance of selecting companies with strong cash flows, innovative capabilities, and established research platforms, particularly in the context of breakthrough therapies and technological advancements in the industry [67]