Development of mesoporous silica-based nanoprobes for optical bioimaging applications

2021 ◽  
Author(s):  
Bo Sun ◽  
Xu Zhen ◽  
Xiqun Jiang
Keyword(s):  
Mesoporous Silica ◽  
Fluorescence Imaging ◽  
Photoacoustic Imaging

This review mainly introduced the MSNs-based nanoprobes for in vivo bioimaging applications including fluorescence imaging and photoacoustic imaging.

scholarly journals Efficient Photoacoustic Imaging With Biomimetic Mesoporous Silica-Based Nanoparticles

2021 ◽  
Vol 9 ◽  
Author(s):  
Chuangjia Huang ◽  
Xiaoling Guan ◽  
Hui Lin ◽  
Lu Liang ◽  
Yingling Miao ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Near Infrared ◽  
Ex Vivo ◽  
Photoacoustic Imaging ◽  
Mesoporous Silica Nanoparticles ◽  
Good Biocompatibility ◽  
Targeting Ability ◽  
Body Clearance

Indocyanine green (ICG), a near-infrared (NIR) fluorescent dye approved by the Food and Drug Administration (FDA), has been extensively used as a photoacoustic (PA) probe for PA imaging. However, its practical application is limited by poor photostability in water, rapid body clearance, and non-specificity. Herein, we fabricated a novel biomimetic nanoprobe by coating ICG-loaded mesoporous silica nanoparticles with the cancer cell membrane (namely, CMI) for PA imaging. This probe exhibited good dispersion, large loading efficiency, good biocompatibility, and homologous targeting ability to Hela cells in vitro. Furthermore, the in vivo and ex vivo PA imaging on Hela tumor-bearing nude mice demonstrated that CMI could accumulate in tumor tissue and display a superior PA imaging efficacy compared with free ICG. All these results demonstrated that CMI might be a promising contrast agent for PA imaging of cervical carcinoma.

scholarly journals Polydopamine-doped virus-like mesoporous silica coated reduced graphene oxide nanosheets for chemo-photothermal synergetic therapy

2020 ◽  
Vol 35 (1) ◽  
pp. 28-38
Author(s):  
Jieying Liao ◽  
Huicong Zhang ◽  
Xuandong Wang
Keyword(s):  
Graphene Oxide ◽  
Mesoporous Silica ◽  
Reduced Graphene Oxide ◽  
Near Infrared ◽  
Photoacoustic Imaging ◽  
Graphene Oxide Nanosheets ◽  
Stratification Method ◽  
Reduced Graphene ◽  
Post Modification

Multifunctional nanocarriers have been widely accepted and utilized for biomedical applications, because of their structural regularity, convenient post-modification and controllable structure and morphology. Herein, we reported polydopamine-doped virus-like mesoporous silica coated reduced graphene oxide nanosheets (rGO@PVMSNs) nanocomposites by a facile oil–water biphase stratification method. The synthesized rGO@PVMSNs nanocomposites performed excellent biocompatibility and photothermal performance. They could be employed as photoacoustic imaging contrast in vivo. Furthermore, the rGO@PVMSNs nanocarriers were used for loading the antitumor drug doxorubicin (DOX), the rGO@PVMSNs@DOX nanocomposites were also demonstrated to be with high inhibition of HepG2 cancer cells, especially with the help of near-infrared irradiation, which were more efficient than single chemotherapy or photothermal therapy. The rGO@PVMSNs@DOX nanocomposites of this work could be used as photoacoustic imaging and chemo-photothermal synergetic therapy agents, which show a new perspective for clinical tumor diagnosis and therapy.

Acceptor Engineering of Small Molecule Fluorophores for NIR-II Fluorescent and NIR-I Photoacoustic Imaging

2021 ◽  
Author(s):  
Yaxi Li ◽  
Hongli Zhou ◽  
Renzhe Bi ◽  
Xiuting Li ◽  
Menglei Zha ◽  
...  
Keyword(s):  
Fluorescence Imaging ◽  
Small Molecule ◽  
Near Infrared ◽  
Photoacoustic Imaging ◽  
High Sensitivity ◽  
Tissue Penetration ◽  
Deep Tissue ◽  
Infrared Window

Fluorescence imaging in the second near-infrared window (NIR-II) has been an emerging technique in diverse in vivo applications with high sensitivity/resolution and deep tissue penetration. To date, the designing principle...

scholarly journals Biocompatible Mesoporous Silica–Polydopamine Nanocomplexes as MR/Fluorescence Imaging Agent for Light-Activated Photothermal–Photodynamic Cancer Therapy In Vivo

2021 ◽  
Vol 9 ◽  
Author(s):  
Jiahui Lu ◽  
Chen Ni ◽  
Jie Huang ◽  
Yawen Liu ◽  
Yingkai Tao ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Mesoporous Silica ◽  
Fluorescence Imaging ◽  
Colloidal Stability ◽  
Silica Nanoparticle ◽  
Photothermal Conversion ◽  
Normal Tissues ◽  
Irradiation Power

Conventional cancer phototherapy with single modality suffers from low therapeutic efficacy and undesired posttreatment damage for adjacent normal tissues. Therefore, the lower NIR laser irradiation power is vital to the reduction or preclusion of risk of scalds and burns in normal tissues. Herein, we rationally proposed a novel multifunctional nanocomplex, which enabled good magnetic resonance (MR) imaging contrast effect and promising photothermal conversion efficacy. The prepared core/shell nanocomplexes [MSN-Ce6@PDA (Mn)] were composed of chlorin e6-embedded mesoporous silica/nanoparticle composites as the cores, and then polydopamine and manganese ions were conjugated on the cores to form protective shells. The MSN-Ce6@PDA (Mn) nanocomplexes revealed superior properties in colloidal stability, photothermal conversion, reaction oxygen species generation, magnetic resonance imaging, etc. Under the guidance of MR and fluorescence imaging, these MSN-Ce6@PDA (Mn) nanocomplexes were found to be primarily accumulated in the MDA-MB-231 tumor area. Furthermore, the combined photodynamic and photothermal therapy exhibited strong inhibition to the growth of MDA-MB-231 tumor in vitro and in vivo. Besides, the MSN-Ce6@PDA (Mn) nanocomplexes also exhibited excellent biocompatibility and low damage to the healthy animals. Hence, the results demonstrated that the prepared MSN-Ce6@PDA (Mn) nanocomplex would be a promising potential for multimodal imaging-guided phototherapy.

scholarly journals PEGylated liposomal photosensitizers as theranostic agents for dual-modal photoacoustic and fluorescence imaging-guided photodynamic therapy

2019 ◽  
Vol 12 (03) ◽  
pp. 1941003 ◽  
Author(s):  
Hao Xu ◽  
Yubin Liu ◽  
Junle Qu ◽  
Zhen Yuan
Keyword(s):  
Photodynamic Therapy ◽  
Contrast Agent ◽  
Fluorescence Imaging ◽  
High Efficiency ◽  
Photoacoustic Imaging ◽  
Treatment Agent ◽  
Theranostic Agents ◽  
Cancer Theranostics

The photosensitizer (PS) as photodynamic therapy (PDT) agent, can also serve as the contrast agent for dual-modal fluorescence imaging (FLI) and photoacoustic imaging (PAI) for precise cancer theranostics. In this study, the PAI capability of commercial PS, benzoporphyrin derivative monoacid ring-A (BPD) were examined and compared with that from the other PSs and dyes such as TPPS4, Cy5 dye and ICG. We discovered that BPD exhibited its advantage as contrast agent for PAI. Meanwhile, BPD can also serve as the contrast agent for enhanced FLI. In particular, the PEGylated nanoliposome (PNL) encapsulated BPD (LBPD) was produced for contrast enhanced dual-modal FLI and PAI and imaging-guided high-efficiency PDT. Enhanced FLI and PAI results demonstrated the significant accumulation of LBPD both within and among individual tumor during 24[Formula: see text]h monitoring for in vivo experiment tests. In-vitro and in-vivo PDT tests were also performed, which showed that LBPD have higher PDT efficiency and can easily break the blood vessel of tumor tissues as compared to that from BPD. It was discovered that LBPD has great potentials as a diagnosis and treatment agent for dual-modal FLI and PAI-guided PDT of cancer.

Multifunctional A7R Peptide-Modified Hollow Mesoporous Silica@Ag2S Nanotheranostics for Photoacoustic/Near-Infrared Fluorescence Imaging-Guided Tumor-Targeted Chemo-Photothermal Therapy

2019 ◽  
Vol 15 (7) ◽  
pp. 1415-1431 ◽  
Author(s):  
Jianrong Wu ◽  
David H. Bremner ◽  
Shiwei Niu ◽  
Dejian Li ◽  
Ranran Tang ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Fluorescence Imaging ◽  
Photothermal Therapy ◽  
Near Infrared ◽  
Mesoporous Silica Nanoparticles ◽  
Photothermal Effect ◽  
Near Infrared Fluorescence ◽  
Hollow Mesoporous Silica ◽  
Near Infrared Fluorescence Imaging

The fabrication of theranostic nanoplatforms which combine diagnostic and therapeutic functions have become an emerging approach for personal nanomedicine. Herein, a multifunctional nanoplatform consisting of A7R peptide (ATWLPPR) conjugated hollow mesoporous silica nanoparticles decorated with Ag2S nanodots (Ag2S@HMSs-A7R) has been developed as an efficient theranostic agent for simultaneous photoacoustic (PA) imaging and near-infrared fluorescence imaging (NIRF)-guided targeted chemotherapy and photothermal therapy against human breast cancer MDA-MB-231 cells. The design of Ag2S doped HMSs by in situ controlled growth of ultrasmall Ag2S nanodots in the mesopores of HMSs. The synthesized multifunctional nanoplatform exhibits high doxorubicin (DOX) loading capability (451 mg/g) and can be precisely controlled by glutathione (GSH), acidic environment and external laser irradiation. Thanks to the strong tunable NIR absorbance of Ag2S, the nanoplatform produce effective photoacoustic capacity and superb photothermal conversion under light irradiation, thereby exhibiting sufficient in vivo fluorescence and photoacoustic signals as well as desirable photothermal therapeutic performance. Importantly, A7R peptide can selectively bind the Neuropilin-1 (NRP-1) receptor which overexpressed by the MDA-MB-231 cells. The achieved Ag2S@HMSs-A7R possess ideal imaging capability for both PA and NIRF imaging in vivo, and the anti-tumor effect of Ag2S@HMSs(DOX)-A7R was studied in vitro and in vivo, showing remarkable synergistic chemo-photothermal effect (combination index, CI < 1). Over all, the strategy of utilizing triple-responsive nanocarriers presents a highly promising potential as an efficient method for cancer theranostics.

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