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Nanoplatforms for Cancer Theranostics / Photodynamic Therapy Research Studies · Journal article
Pharmaceutics · August 11, 2026
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This is a laboratory synthesis and evaluation of two novel BODIPY-loaded liposomal formulations as photodynamic therapy agents. Liposomal encapsulation enhanced cellular uptake and induced potent antitumor effects through multiple cell death pathways in 2D and 3D cancer models in vitro. The work is mechanistically sound but remains preclinical; progression to in vivo efficacy, pharmacokinetics, and safety studies is needed before clinical relevance can be assessed.
In vitro mechanistic study with 2D cell cultures and 3D spheroid models. Colorectal and ovarian cancer cell lines; no patient-derived material mentioned. Intervention: BODIPY-loaded liposomes (two novel derivatives differing in methyl ester position on meso-phenyl ring) with light activation. Compared with: Free BODIPY compounds (non-liposomal).
Liposomal formulations significantly enhanced cellular uptake compared with free compounds Both BODIPY-liposomal formulations induced potent antitumor effects following light activation in colorectal and ovarian cancer cell lines Antitumor activity maintained strong efficacy in 3D tumor spheroids
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In vitro proof-of-concept study of a novel liposomal formulation in cancer cell lines and spheroids, demonstrating mechanism but lacking in vivo efficacy data, pharmacokinetics, or clinical readiness.
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Background: Photodynamic therapy (PDT) is a cancer treatment that combines a photosensitizer (PS), light, and oxygen to generate reactive oxygen species (ROS), leading to tumor cell death. PDT efficacy depends largely on PS accumulation within tumors, prompting the development of third-generation PSs and nanotechnology-based delivery systems. Among these, BODIPYs (4,4-difluoro-4-bora-3a,4a-diaza-s-indacene) are promising PSs due to their favorable photophysical properties, while liposomes improve drug delivery, cellular uptake, and sustained release profiles. This study describes the synthesis of two novel BODIPY derivatives differing in the position of a methyl ester group on the meso-phenyl ring, their incorporation into liposomes, and evaluation of PDT efficacy. Methods: Cellular uptake of BODIPY-loaded liposomes, intracellular ROS generation, apoptosis, necrosis, and lipid peroxidation were assessed by flow cytometry in colorectal and ovarian cancer cell lines. The antitumor activity of the liposomal formulations was further evaluated in both 2D and 3D models using MTT and clonogenic assays. The involvement of ferroptosis and necroptosis in PDT-induced cell death was also investigated. Results: Liposomal formulations significantly enhanced cellular uptake compared with free compounds. Following light activation, both formulations induced potent antitumor effects through multiple cell death mechanisms, including canonical and non-canonical pathways, and maintained strong efficacy in 3D tumor spheroids. Conclusions: Liposome-encapsulated BODIPYs represent promising PDT agents by improving cellular uptake and eliciting robust antitumor activity through complementary cell death mechanisms. Furthermore, the methyl ester substituent on the meso-phenyl ring provides a versatile platform for future conjugation with targeting ligands, supporting the development of third-generation, tumor-targeted photosensitizers and warranting further preclinical investigation.
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