Supramolecular H-Aggregates of Squaraines with Enhanced Type I Photosensitization for Combined Photodynamic and Photothermal Therapy

ACS Nano, Год журнала: 2024, Номер 18(37), С. 25671 - 25684

Опубликована: Сен. 3, 2024

Combined photodynamic and photothermal therapy (PDT PTT) can achieve more superior therapeutic effects than the sole mode by maximizing photon utilization, but there remains a significant challenge in development of related single-molecule photosensitizers (PSs), particularly those with type I photosensitization. In this study, self-assembly squaraine dyes (SQs) is shown to be promising strategy for designing PSs combined PDT PTT, supramolecular PS (TPE-SQ7) has been successfully developed through subtle molecular design an indolenine SQ, which self-assemble into highly ordered H-aggregates aqueous solution as well nanoparticles (NPs). contrast typical quenching effect on reactive oxygen species (ROS) generation, our results encouragingly manifest that enhance ROS (

Язык: Английский

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Lumos maxima – How robust fluorophores resist photobleaching?

Current Opinion in Chemical Biology, Год журнала: 2024, Номер 79, С. 102439 - 102439

Опубликована: Март 2, 2024

Язык: Английский

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Molecular Engineering of a Tumor‐Targeting Thione‐Derived Diketopyrrolopyrrole Photosensitizer to Attain NIR Excitation Over 850 nm for Efficient Dual Phototherapy

Advanced Science, Год журнала: 2024, Номер unknown

Опубликована: Окт. 16, 2024

Abstract Photosensitizers with near‐infrared (NIR) excitation, especially above 800 nm which is highly desired for phototherapy, remain rare due to the fast nonradiative relaxation process induced by exciton‐vibration coupling. Here, a diketopyrrolopyrrole‐derived photosensitizer (DTPA‐S) developed via thionation of carbonyl groups within diketopyrrolopyrrole skeleton, results in large bathochromic shift 81 nm, endowing strong NIR absorption at 712 nm. DTPA‐S then introduced functional biomolecule (N 3 ‐PEG 2000 ‐RGD) click reaction construction integrin αvβ3 receptor‐targeted nano‐micelles (NanoDTPA‐S/RGD), endows further superlarge redshift 138 thus extending maxima ≈850 Remarkably, thiocarbonyl substitution increases nonbonding characters frontier molecular orbitals, can effectively suppress vibrational reducing reorganization energy, enabling efficient reactive oxygen species (ROS) generation under 880 excitation. Screened vitro and vivo assays, NanoDTPA‐S/RGD high water solubility, excellent tumor‐targeting ability, photodynamic/photothermal therapy synergistic effect exhibits satisfactory phototherapeutic performance. Overall, this study demonstrates new design NIR‐triggered facile installation biomolecules potential clinical applications.

Язык: Английский

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Albumin Modulated Homodimer as an Efficient Photosensitizer for Long‐Term Imaging‐Guided Tumor Therapy Directed with Sunlight Irradiation

Small, Год журнала: 2025, Номер unknown

Опубликована: Март 17, 2025

Abstract The reactive oxygen species (ROS) amplification caused by inevitable plasma albumin encapsulation is still a challenge to circumvent the systemic adverse effects in photodynamic therapy (PDT) process. Herein, disulfide bond linked homodimer, Cy1280, which modulated accurately balance fluorescence and ROS generation exhibit weak sealed PDT effect during blood circulation, exploited. Cy1280 can be specifically internalized dispersed at tumor site via Organic Anion Transporter Proteins (OATPs) thiol‐disulfide exchange mediated synergistic uptake activated after mild sunlight irradiation (100 ± 5 Klx) sensitize neighboring cellular mitochondria execute direct protein dysfunction effect. dynamic covalent chemistry (DCC) facilitates prolonged sustained retention tumors (>336 h) demonstrates efficacy of imaging‐guided solid‐tumor tumor‐bearing BALB/C mice. This study resolves stubborn impotent penetration bulky‐sized nanoparticles high interstitial pressure with manner, long‐term circulation manipulated also improve whole body phototoxic symptom. advantageous feature provides promising candidate for overcoming off‐target phototoxicity inadequate accumulation challenges clinical translation photosensitizers (PSs).

Язык: Английский

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Advancing Single-Molecule Biophysics: Next-Generation Organic Fluorophores with Tailored Labeling Strategies

Chemical & Biomedical Imaging, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Язык: Английский

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Recent Advances for Synthesis and Bioapplications of Polymethine Cyanines

Asian Journal of Organic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Апрель 11, 2025

Abstract Polymethine cyanine dyes have witnessed significant advancements in bioimaging and phototherapy due to their optical properties ease of modification. This review categorizes introduces typical synthesis Cy3, Cy5, Cy7 longer polymethine dyes, highlights organic‐specific in‐cell cyanines via the newly‐established pseudo‐trimerization method using a single exogenous precursor activatable by visible light, free radicals or reactive oxygen species. Further discussions delve into functionalization strategies structure‐activity relationships summarizes bioapplications fluorescence imaging, multimodal assisted diagnosis treatments, aiming unlock full potential scientific research clinical translation.

Язык: Английский

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A cyanine-based probe for sensitive and selective detection of mustard gas simulant CEES

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, Год журнала: 2025, Номер 340, С. 126318 - 126318

Опубликована: Май 1, 2025

Язык: Английский

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Smart Type I Squaraine Nano-Photosensitizer Combined with MnO₂ for Tumor-Targeted and Ferroptosis-Induced Immunogenic Photodynamic Therapy

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Май 14, 2025

Most photosensitizers face enormous challenges in tumor hypoxia, the redox microenvironment, and low immune efficacies for reactive oxygen species (ROS). Herein, dye SQ-580 was constructed by coupling electron-donating indole thiophenazine-thiophene with electron-withdrawing dicyanovinyl squaraine. It exhibited a high generation of •OH O2•- decreasing ΔES1T2 acted as an excellent type I photosensitizer conquering hypoxia. The nanoplatform involving SQ-580, MnO2, targeting peptide CREKA targeted breast tumor. In MnO2 reacted high-expressed GSH produced Mn2+, which catalyzed H2O2 to decompose into induced chemodynamic therapy (CDT). reduction inhibited consumption maintained its photodynamic (PDT) efficacy. depletion ROS resulted cell ferroptosis. Under synergy ferroptosis ROS, Mn2+ amplified immunogenic death (ICD). mouse models, SQ-580@MnO2 NPs showed NIRF/MR imaging-guided targeting, effectively growth primary distant tumors, PDT PDT, CDT, ferroptosis, ICD. This study provides effective strategy design amplify ICD utilizing valence metals microenvironment.

Язык: Английский

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Synthetic Approaches Toward Phosphorus-Containing BODIPY and Squaraine Dyes: Enhancing Versatility of Small-Molecule Fluorophores

Molecules, Год журнала: 2024, Номер 30(1), С. 116 - 116

Опубликована: Дек. 31, 2024

Phosphorus-containing fluorophores provide a versatile framework for tailoring photophysical properties, enabling the design of advanced fluorogenic materials various applications. Boron dipyrromethene (BODIPY) and squaraine dyes are interest due to their multifaceted modularity synthetic accessibility. Incorporating phosphorus-based functional groups into BODIPY or scaffolds has been achieved through plethora methods, including post-dye assembly functionalization. These modifications often influence key spectroscopic properties molecular functionality by expanding utility in bioimaging, sensing, photosensitization, theranostic By leveraging tunable nature phosphorus-containing moieties, these hold immense promise addressing current challenges spectroscopy, imaging, material designs while unlocking new opportunities systems chemistry, biology, medicine.

Язык: Английский

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One-Step Preparation Method and Rapid Detection Implementation Scheme for Simple Magnetic Tagging Materials

Magnetochemistry, Год журнала: 2024, Номер 10(7), С. 44 - 44

Опубликована: Июнь 22, 2024

With the widespread application of tagging materials, existing chemical materials exhibit limitations in stability and detection under field conditions. This study introduces a novel magnetic scheme. Hydrophilic material-modified Fe3O4 nanoparticles (COOH-PEG@Fe3O4 NPs) were synthesized using co-precipitation technique. The content liquid can reach up to 10 wt% remain stable an aqueous phase system for seven days. research details preparation process, characterization methods (IR, 1HNMR, EDX, XRD, SEM, TEM, VSM, DLS), performance effects tagging. Experimental results indicate that COOH-PEG@Fe3O4 NPs high remanence intensity (Br = 1.75 emu/g) considerable stability, making it possible quickly detect tagged liquids portable flux meters optical pump magnetometers. provides new insights into design particularly suitable long-term convenient scenarios.

Язык: Английский

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