Despite the apparent copious fluorescent probes targeting mitochondria, the development of low cytotoxic probes is still needed for improving validation of mitochondrial function assessment. Herein, we report a novel cyanine-based NIR fluorescent probe, T2, which selectively targets mitochondria with significantly low toxicity by modulating the intracellular redox status. Additionally, T2 inhibits oxidative stress-induced cell death in cortical neurons. This study provides new insight into developing low-toxic mitochondrial imaging agents by regulating redox homeostasis.
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http://dx.doi.org/10.1039/d3cc03259k | DOI Listing |
Int J Nanomedicine
January 2025
Guangzhou Institute of Cancer Research, the Affiliated Cancer Hospital, Guangzhou Medical University, Guangzhou, Guangdong, 510095, People's Republic of China.
Purpose: Photo-immunotherapy faces challenges from poor immunogenicity and low response rate due to hypoxic microenvironment. This study presents Rh-PTZ, a small organic molecule with a D-π-A structure, that simultaneously amplifies mitochondria-targeted type-I PDT-dependent immune stimulation for the treatment of hypoxic cancer.
Methods: The hydrophobic Rh-PTZ was encapsulated into F127 to prepare Rh-PTZ nanoparticles (Rh-PTZ NPs).
Biomaterials
January 2025
State Key Laboratory of Bioactive Substances and Function of Natural Medicine, Beijing Key Laboratory of Active Substances Discovery and Drugability Evaluation, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, PR China. Electronic address:
In situ activation of prodrugs or photosensitizers is a promising strategy for specifically killing tumor cells while avoiding toxic side effects. Herein, we originally develop a bioorthogonally activatable prodrug and pro-photosensitizer system to synchronously yield an aggregation-induced emission (AIE) photosensitizer and a chemotherapeutic drug for synergistic chemo-photodynamic-immunotherapy of tumors. By employing molecular engineering strategy, we rationally design a family of tetrazine-functionalized tetraphenylene-based photosensitizers, one of which (named TzPS5) exhibits a high turn-on ratio, a NIR emission, a typical AIE character, and an excellent ROS generation efficiency upon bioorthogonal-activation.
View Article and Find Full Text PDFBioconjug Chem
January 2025
Department of Chemistry, Organic Chemistry Section, Jadavpur University, Kolkata 700032, India.
Herein, a water-soluble, ultrabright, near-infrared (NIR) fluorescent, mechanically interlocked molecules (MIMs)-peptide bioconjugate is designed with dual targeting capabilities. Cancer cell surface overexpressed αβ integrin targeting two RGDS tetrapeptide residues is tethered at the macrocycle of MIMs-peptide bioconjugate via Cu(I)-catalyzed click chemistry on the Wang resin, and mitochondria targeting lipophilic cationic TPP functionality is conjugated at the axle dye. Living carcinoma cell selective active targeting, subsequently cell penetration, mitochondrial imaging, including the ultrastructure of cristae, and real-time tracking of malignant mitochondria by MIMs-peptide bioconjugate (RGDS)-Mito-MIMs-TPP are established by stimulated emission depletion (STED) super-resolved fluorescence microscopy.
View Article and Find Full Text PDFJ Control Release
January 2025
Department of Biomedical Sciences and BioMedical Sciences Graduate Program (BMSGP), Chonnam National University Medical School, Gwangju 61469, Republic of Korea; DR.Cure Inc., Hwasun 58128, Republic of Korea. Electronic address:
Cancer photoimmunotherapy represents an intelligent and highly efficient therapeutic approach that harnesses the photothermal effect to precisely target and ablate tumor tissues, while simultaneously modulating the immune system to achieve tumor elimination. The integration of multifunctional therapeutic modalities for combined photoimmunotherapy requires advanced drug delivery systems. However, the design of a single nanoagent capable of serving as a multifunctional nanophotosensitizer remains a significant challenge.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
January 2025
School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
Adenosine triphosphate (ATP), the primary energy currency in cells, is dynamically regulated across different subcellular compartments. The ATP interplay between mitochondria and endoplasmic reticulum (ER) underscores their coordinated roles in various biochemical processes, highlighting the necessity for precise profiling of subcellular ATP dynamics. Here we present an exogenously and endogenously dual-regulated DNA nanodevice for spatiotemporally selective, subcellular-compartment specific signal amplification in ATP sensing.
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