Cited by 43Nanoplatforms for cancer theranosticsPhotodynamic Therapy Research StudiesLuminescence and Fluorescent Materials

Thiophene donor for NIR-II fluorescence imaging-guided photothermal/photodynamic/chemo combination therapy

Open access
Liu, Qiang, Tian, Jiangwei, Tian, Ye, Sun, Qinchao, Sun, Dan, Liu, Dewen, Wang, Feifei, Xu, Haijun +4 more·2021·Acta Biomaterialia

Abstract

Organic fluorophores/photosensitizers have been widely used in biological imaging and photodynamic and photothermal combination therapy in the first near-infrared (NIR-I) window. However, their applications in the second near-infrared (NIR-II) window are still limited primarily due to low fluorescence quantum yields (QYs). Here, a boron dipyrromethene (BDP) is created as a molecularly engineered thiophene donor unit with high QYs to the redshift. Thiophene insertion initiates substantial redshifts of the absorbance as compared to its counterparts in which iodine is introduced. The fluorescent molecule can be triggered by an NIR laser with a single wavelength, thereby producing emission in the NIR-II windows. Single NIR laser-triggered phototherapeutic nanoparticles (NPs) are developed by encapsulating the BDP and the chemotherapeutic drug docetaxel (DTX) by using a synthetic amphiphilic poly(styrene-co-chloromethyl styrene)-graft-poly(ethylene glycol) functionalized with folic acid (FA). These BDP-T-N-DTX-FA NPs not only show superior solubility and high singlet oxygen QY (Φ Δ=62%) but also demonstrate single NIR laser-triggered multifunctional characteristics. After intravenous administration of the NPs into 4T1 tumor-bearing mice, the accumulation of the NPs in the tumor showed a high signal-to-background ratio (11.8). Furthermore, 4T1 tumors in mice were almost eradicated by DTX released from the BDP-T-N-DTX-FA NPs under single NIR laser excitation and the combination of photodynamic therapy (PDT) and photothermic therapy (PTT). STATEMENT OF SIGNIFICANCE: The application of organic photosensitizers is still limited primarily due to low fluorescence quantum yields (QYs) in the second near-infrared (NIR-II) window. Here, a boron dipyrromethene (BDP) as a molecularly engineered thiophene donor unit with high QYs to the redshift is created. Phototherapeutic nanoparticles (NPs) are developed by encapsulating the BDP and docetaxel (DTX) using a synthetic amphiphilic poly(styrene-co-chloromethyl styrene)-graft-poly(ethylene glycol) functionalized with folic acid (FA). These BDP-T-N-DTX-FA NPs not only show high singlet oxygen QY (Φ Δ=62%) but also demonstrate single NIR laser-triggered multifunctional characteristics and a high signal-to-background ratio (11.8). Furthermore, 4T1 tumors in mice were almost eradicated by DTX released from the BDP-T-N-DTX-FA NPs under single NIR laser excitation and the PDT/PTT combination therapy.

Integrity signals

Registry

Crossref · 10.1016/j.actbio.2021.03.064

Cites

50 of 50 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • BODIPY derivatives are an emerging class of small-molecule fluorophores that are key components in NIR dyes due to their strongly electron-withdrawing BF2 group and exceptional stability.

    “BODIPY derivatives are an emerging class of small-molecule fluorophores that are key components in NIR dyes due to their strongly electron-withdrawing BF2 group and exceptional stability (Fig. 7 and Table 3)153–168.”

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Liu, Q., Tian, J., Tian, Y., Sun, Q., Sun, D., Liu, D., Wang, F., Xu, H., Ying, G., Wang, J., Yetisen, A. K., & Jiang, N.
Affiliations
  • China Academy of Chinese Medical Sciences (CN)
  • China Pharmaceutical University (CN)
  • Southern Medical University (CN)
  • Chinese Academy of Sciences (CN)
  • Nanjing Forestry University (CN)
  • Stanford University (US)
  • Brigham and Women's Hospital (US)
  • Southern University of Science and Technology (CN)
  • Imperial College London (GB)
  • Harvard University (US)
Corresponding author
  • Xu, Haijun
  • Ying, Guoliang
  • Wang, Jigang
  • Jiang, Nan
Venue
Acta Biomaterialia
Publisher
Elsevier BV
Published
2021-06
Volume
127
Pages
287-297
ISSN
1742-7061 (ISSN-L)
OpenAlex
W3149750019
Cited by
43
References
50
Citations by year
2026: 6 · 2025: 9 · 2024: 11 · 2023: 8 · 2022: 9
FWCI
2.12
Type
journal article
Language
en
Update notices
erratum (2022-04-01)
Open access
Locations
  • Acta Biomaterialia (publishedVersion)
  • SSRN Electronic Journal (acceptedVersion)
  • PubMed (publishedVersion)
Funders
  • Fundamental Research Funds for the Central Universities
  • National Natural Science Foundation of China (21775166)
  • Natural Science Foundation of Jiangsu Province (BK20151513, BK20180026)
Topics
  • Physical Sciences › Engineering › Biomedical Engineering › Nanoplatforms for cancer theranostics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Photodynamic Therapy Research Studies
  • Physical Sciences › Materials Science › Materials Chemistry › Luminescence and Fluorescent Materials
Keywords
NIR-II fluorescence imaging, boron dipyrromethene, thiophene donor, photothermal therapy, photodynamic therapy, docetaxel, combination therapy, folic acid targeting, polymeric nanoparticles, tumor targeting, 4T1 breast cancer, near-infrared photosensitizer
MeSH terms
Animals, Photochemotherapy, Thiophenes, Photosensitizing Agents, Cell Line, Tumor, Mice, Nanoparticles, Optical Imaging

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review