scholarly journals The Role of Rosmarinic Acid on the Bioproduction of Gold Nanoparticles as Part of a Photothermal Approach for Breast Cancer Treatment

Biomolecules ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 71
Author(s):  
Tânia Ferreira-Gonçalves ◽  
Maria Manuela Gaspar ◽  
João M. P. Coelho ◽  
Vanda Marques ◽  
Ana S. Viana ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Gold Nanoparticles ◽  
Rosmarinic Acid ◽  
Near Infrared ◽  
Active Role ◽  
Synthetic Method ◽  
Tumor Cell Death ◽  
Maximum Absorbance

Breast cancer is a high-burden malignancy for society, whose impact boosts a continuous search for novel diagnostic and therapeutic tools. Among the recent therapeutic approaches, photothermal therapy (PTT), which causes tumor cell death by hyperthermia after being irradiated with a light source, represents a high-potential strategy. Furthermore, the effectiveness of PTT can be improved by combining near infrared (NIR) irradiation with gold nanoparticles (AuNPs) as photothermal enhancers. Herein, an alternative synthetic method using rosmarinic acid (RA) for synthesizing AuNPs is reported. The RA concentration was varied and its impact on the AuNPs physicochemical and optical features was assessed. Results showed that RA concentration plays an active role on AuNPs features, allowing the optimization of mean size and maximum absorbance peak. Moreover, the synthetic method explored here allowed us to obtain negatively charged AuNPs with sizes favoring the local particle accumulation at tumor site and maximum absorbance peaks within the NIR region. In addition, AuNPs were safe both in vitro and in vivo. In conclusion, the synthesized AuNPs present favorable properties to be applied as part of a PTT system combining AuNPs with a NIR laser for the treatment of breast cancer.

scholarly journals Assessment of the Theranostic Potential of Gold Nanostars—A Multimodal Imaging and Photothermal Treatment Study

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2112 ◽  
Author(s):  
Antoine D’Hollander ◽  
Greetje Vande Velde ◽  
Hilde Jans ◽  
Bram Vanspauwen ◽  
Elien Vermeersch ◽  
...  
Keyword(s):  
Near Infrared ◽  
Tumor Imaging ◽  
Photoacoustic Imaging ◽  
Tumor Therapy ◽  
Infrared Region ◽  
Tumor Cell Death ◽  
Gold Nanostars ◽  
Theranostic Agents

Gold nanoparticles offer the possibility to combine both imaging and therapy of otherwise difficult to treat tumors. To validate and further improve their potential, we describe the use of gold nanostars that were functionalized with a polyethyleneglycol-maleimide coating for in vitro and in vivo photoacoustic imaging (PAI), computed tomography (CT), as well as photothermal therapy (PTT) of cancer cells and tumor masses, respectively. Nanostar shaped particles show a high absorption coefficient in the near infrared region and have a hydrodynamic size in biological medium around 100 nm, which allows optimal intra-tumoral retention. Using these nanostars for in vitro labeling of tumor cells, high intracellular nanostar concentrations could be achieved, resulting in high PAI and CT contrast and effective PTT. By injecting the nanostars intratumorally, high contrast could be generated in vivo using PAI and CT, which allowed successful multi-modal tumor imaging. PTT was successfully induced, resulting in tumor cell death and subsequent inhibition of tumor growth. Therefore, gold nanostars are versatile theranostic agents for tumor therapy.

Stimuli-responsive Drug Delivery Nanocarriers in the Treatment of Breast Cancer

2020 ◽  
Vol 27 (15) ◽  
pp. 2494-2513 ◽  
Author(s):  
João A. Oshiro-Júnior ◽  
Camila Rodero ◽  
Gilmar Hanck-Silva ◽  
Mariana R. Sato ◽  
Renata Carolina Alves ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Drug Delivery ◽  
Cancer Therapy ◽  
Near Infrared ◽  
Stimuli Responsive ◽  
Breast Cancer Therapy ◽  
Physical Stimuli ◽  
Pharmaceutical Properties

Stimuli-responsive drug-delivery nanocarriers (DDNs) have been increasingly reported in the literature as an alternative for breast cancer therapy. Stimuli-responsive DDNs are developed with materials that present a drastic change in response to intrinsic/chemical stimuli (pH, redox and enzyme) and extrinsic/physical stimuli (ultrasound, Near-infrared (NIR) light, magnetic field and electric current). In addition, they can be developed using different strategies, such as functionalization with signaling molecules, leading to several advantages, such as (a) improved pharmaceutical properties of liposoluble drugs, (b) selectivity with the tumor tissue decreasing systemic toxic effects, (c) controlled release upon different stimuli, which are all fundamental to improving the therapeutic effectiveness of breast cancer treatment. Therefore, this review summarizes the use of stimuli-responsive DDNs in the treatment of breast cancer. We have divided the discussions into intrinsic and extrinsic stimuli and have separately detailed them regarding their definitions and applications. Finally, we aim to address the ability of these stimuli-responsive DDNs to control the drug release in vitro and the influence on breast cancer therapy, evaluated in vivo in breast cancer models.

scholarly journals Hyaluronic acid Hydrogels Hybridized with Au-Triptolide Nanoparticle for Intra-articular targeted multi-therapy of Rheumatoid Arthritis

2022 ◽  
Author(s):  
Chenxi Li ◽  
Rui Liu ◽  
Yurong Song ◽  
Dongjie Zhu ◽  
Liuchunyang Yu ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Gold Nanoparticles ◽  
Hyaluronic Acid ◽  
Near Infrared ◽  
Mtor Pathway ◽  
Collagen Induced Arthritis ◽  
Hybrid Hydrogels ◽  
Low Dosage

Abstract Triptolide (TP) is a DMARD highly effective in patients with RA. Hyaluronic acid (HA) hydrogels loaded RGD-attached gold nanoparticles containing TP were synthesized to alleviate the toxicity and increase therapeutic specificity. The hydrogels can be applied for targeted photothermal-chemo therapy, and in vivo imaging of RA. Heat was locally generated at the inflammation site after degradation of HA chains due to near-infrared resonance (NIR) irradiation of gold nanoparticles (AuNPs), and TP was released. Administration of the hybrid hydrogels containing low dosage of TP combined with NIR irradiation alleviated arthritic conditions and improved the inflamed joint in collagen-induced arthritis (CIA) mice. In vitro effect of the hydrogel was mediated through decrease of phosphorylation of mTOR and its substrate, p70S6K1, thus inhibiting mTOR pathway.

scholarly journals αvβ3-Specific Gold Nanoparticles for Fluorescence Imaging of Tumor Angiogenesis

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 138
Author(s):  
Marc Pretze ◽  
Valeska von Kiedrowski ◽  
Roswitha Runge ◽  
Robert Freudenberg ◽  
René Hübner ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Imaging ◽  
Tumor Angiogenesis ◽  
Near Infrared ◽  
Αvβ3 Integrin ◽  
A431 Cells ◽  
Rgd Peptides ◽  
Therapeutic Concepts

This paper reports on the development of tumor-specific gold nanoparticles (AuNPs) as theranostic tools intended for target accumulation and the detection of tumor angiogenesis via optical imaging (OI) before therapy is performed, being initiated via an external X-ray irradiation source. The AuNPs were decorated with a near-infrared dye, and RGD peptides as the tumor targeting vector for αvβ3-integrin, which is overexpressed in tissue with high tumor angiogenesis. The AuNPs were evaluated in an optical imaging setting in vitro and in vivo exhibiting favorable diagnostic properties with regards to tumor cell accumulation, biodistribution, and clearance. Furthermore, the therapeutic properties of the AuNPs were evaluated in vitro on pUC19 DNA and on A431 cells concerning acute and long-term toxicity, indicating that these AuNPs could be useful as radiosensitizers in therapeutic concepts in the future.

Gold Nanoparticles; Potential Nanotheranostic Agent in Breast Cancer: A Comprehensive Review with Systematic Search Strategy

2020 ◽  
Vol 21 (8) ◽  
pp. 579-598
Author(s):  
Shahad Saif Khandker ◽  
Md. Salman Shakil ◽  
Md. Sakib Hossen
Keyword(s):  
Breast Cancer ◽  
Gold Nanoparticles ◽  
Systematic Search ◽  
Diagnostic Strategies ◽  
Cancer Management ◽  
Breast Cancer Management ◽  
Therapeutic Tools ◽  
Surface Modified

Background: Breast cancer is a heterogeneous disease typically prevalent among women and is the second-largest cause of death worldwide. Early diagnosis is the key to minimize the cancer-induced complication, however, the conventional diagnostic strategies have been sluggish, complex, and, to some extent, non-specific. Therapeutic tools are not so convenient and side effects of current therapies offer the development of novel theranostic tool to combat this deadly disease. Objective: This article aims to summarize the advances in the diagnosis and treatment of breast cancer with gold nanoparticles (GNP or AuNP). Methods: A systematic search was conducted in the three popular electronic online databases including PubMed, Google Scholar, and Web of Science, regarding GNP as breast cancer theranostics. Results: Published literature demonstrated that GNPs tuned with photosensitive moieties, nanomaterials, drugs, peptides, nucleotide, peptides, antibodies, aptamer, and other biomolecules improve the conventional diagnostic and therapeutic strategies of breast cancer management with minimum cytotoxic effect. GNP derived diagnosis system assures reproducibility, reliability, and accuracy cost-effectively. Additionally, surface-modified GNP displayed theranostic potential even in the metastatic stage of breast cancer. Conclusion: Divergent strategies have shown the theranostic potential of surface tuned GNPs against breast cancer even in the metastatic stage with minimum cytotoxic effects both in vitro and in vivo.

scholarly journals ICAM-1 Targeted Drug Combination Nanoparticles Enhanced Gemcitabine-Paclitaxel Exposure and Breast Cancer Suppression in Mouse Models

Pharmaceutics ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 89
Author(s):  
Linxi Zhu ◽  
Qingxin Mu ◽  
Jesse Yu ◽  
James I. Griffin ◽  
Xiaolin Xu ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Cancer Cell ◽  
Drug Combination ◽  
Near Infrared ◽  
Metastatic Breast ◽  
Intercellular Adhesion Molecule ◽  
Intercellular Adhesion Molecule 1 ◽  
Targeted Drug

Despite the availability of molecularly targeted treatments such as antibodies and small molecules for human epidermal growth factor receptor 2 (HER2), hormone receptor (HR), and programmed death-ligand 1 (PD-L1), limited treatment options are available for advanced metastatic breast cancer (MBC), which constitutes ~90% mortality. Many of these monotherapies often lead to drug resistance. Novel MBC-targeted drug-combination therapeutic approaches that may reduce resistance are urgently needed. We investigated intercellular adhesion molecule-1 (ICAM-1), which is abundant in MBC, as a potential target to co-localize two current drug combinations, gemcitabine (G) and paclitaxel (T), assembled in a novel drug-combination nanoparticle (GT DcNP) form. With an ICAM-1-binding peptide (referred to as LFA1-P) coated on GT DcNPs, we evaluated the role of the LFA1-P density in breast cancer cell localization in vitro and in vivo. We found that 1–2% LFA1-P peptide incorporated on GT DcNPs provided optimal cancer cell binding in vitro with ~4× enhancement compared to non-peptide GT DcNPs. The in vivo probing of GT DcNPs labeled with a near-infrared marker, indocyanine green, in mice by bio-imaging and G and T analyses indicated LFA1-P enhanced drug and GT DcNP localization in breast cancer cells. The target/healthy tissue (lung/gastrointestinal (GI)) ratio of particles increased by ~60× compared to the non-ligand control. Collectively, these data indicated that LFA1 on GT DcNPs may provide ICAM-1-targeted G and T drug combination delivery to advancing MBC cells found in lung tissues. As ICAM-1 is generally expressed even in breast cancers that are triple-negative phenotypes, which are unresponsive to inhibitors of nuclear receptors or HER2/estrogen receptor (ER) agents, ICAM-1-targeted LFA1-P-coated GT DcNPs should be considered for clinical development to improve therapeutic outcomes of MBCs.

Comparison of Gold Nanospheres, Nanorods, Nanocages and Nanoflowers for Combined Photothermal-Radiotherapy of Cancer

NANO ◽  
2021 ◽  
pp. 2150037
Author(s):  
Lijie Yang ◽  
Jinhua Wang ◽  
Liying Sun ◽  
Yisi Zhang ◽  
Peng Huang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Conversion Efficiency ◽  
Near Infrared ◽  
Enhancement Effect ◽  
Gold Nanospheres ◽  
Photothermal Conversion ◽  
Uptake Efficiency ◽  
Gold Nanoflowers

Gold nanoparticles are promising dual agents for combined photothermal-radiotherapy of cancer. Nevertheless, the shape effects of gold nanoparticles on photothermal conversion efficiency and radiosensitization have not been completely revealed. To address this knowledge gap, different shapes of gold nanoparticles including gold nanospheres (GNSs), gold nanorods (GNRs), gold nanocages (GNCs) and gold nanoflowers (GNFs) were synthesized. Despite being subjected to the same modification with poly (ethylene glycol) (PEG), these gold nanoparticles showed different cellular uptake efficiencies: GNFs[Formula: see text][Formula: see text][Formula: see text]GNSs[Formula: see text][Formula: see text][Formula: see text]GNCs[Formula: see text][Formula: see text][Formula: see text]GNRs. Moreover, GNRs, GNCs and GNFs could convert near-infrared (NIR) light to heat and GNFs displayed the highest photothermal conversion efficiency, whereas GNSs showed poor photothermal effects due to the weak NIR absorption. The highest uptake efficiency as well as the best photothermal conversion ability led to GNFs to exhibit the best photothermal therapeutic effect. Furthermore, all the gold nanoparticles could be used as radiosensitizers to improve radiotherapeutic effect. Among these nanoparticles, GNFs showed the best radiation enhancement effect because of their highest uptake efficiency. Furthermore, a higher accumulation of GNFs in tumor tissues was observed than those of other shaped gold nanoparticles. Importantly, our in vitro and in vivo comparative studies revealed that GNFs possessed the strongest anticancer effect in combined photothermal-radiotherapy. Hence, compared to gold nanoparticles with other shapes, the GNFs might be more desirable dual agents for highly efficient combined photothermal-radiotherapy.

Polymer anchored gold nanoparticles: Synthesis, characterization and antimicrobial activities

2020 ◽  
Vol 10 ◽  
Author(s):  
Pranesh Chowdhury ◽  
Bishnupada Roy ◽  
Suprabhat Mukherjee ◽  
Niladri Mukherjee ◽  
Nikhilesh Joardar ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Near Infrared ◽  
Wistar Rat ◽  
Antimicrobial Activities ◽  
X Rays ◽  
Photothermal Treatment ◽  
Surface Enhanced Raman ◽  
Polymer Anchored

Abstract : Gold nanoparticles (GNPs) have diverse optical and photo-thermal properties. It is used for diagnostic imaging because of their ability to absorb near infrared (NIR) and X-rays, and their surface enhanced Raman scattering properties. Recently they are used for drug delivery and more particularly photothermal treatment. Their ability to absorb NIR energy and convert it to heat by a Surface Plasmon Resonance mechanism has made these materials promising for the treatment of tumors. GNPs having diameter higher than 1.4–1.5 nm is found nontoxic to the environment. In the present work, polymer anchored GNPs are synthesized by reducing AuIII to Au0 in presence of either chitosan or polyvinyl alcohol, which act as in situ reducers cum stabilizers. Microscopic techniques (TEM, SEM and DLS) are used to analyse the size, surface morphology and size distribution respectively. The unique mucoadhesive properties of chitosan particularly make the system promising with respect to antimicrobial (anti-bacteria as well as anti-fungus) activities. An attempt has been made to understand the mechanistic path involved in antimicrobial activities. Antimicrobial potential of chitosan anchored gold nanoparticles (GNPc) are noticed even at very low dose. The results of bio-chemical analysis (MDA, NBT, DNA fragmentation and over-expression of heat shock protein) clearly explain antimicrobial activities. Additionally, gold chitosan systems interact with microbial DNA and inhibit the action of DNA repair enzyme. Interestingly, in vitro (rat peritoneal MФ) or in vivo (Wistar rat) analysis exhibits negligible cytotoxicy. Thus the synthesized material (particularly GNPc) is promising as an effective nano therapeutic agent.

scholarly journals A Step Forward in Breast Cancer Research: From a Natural-Like Experimental Model to a Preliminary Photothermal Approach

2020 ◽  
Vol 21 (24) ◽  
pp. 9681
Author(s):  
Eduardo Costa ◽  
Tânia Ferreira-Gonçalves ◽  
Miguel Cardoso ◽  
João M. P. Coelho ◽  
Maria Manuela Gaspar ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Gold Nanoparticles ◽  
Experimental Model ◽  
Near Infrared ◽  
Experimental Models ◽  
Female Rats ◽  
Breast Cancer Surgery ◽  
Preliminary Treatment ◽  
Sprague Dawley

Breast cancer is one of the most frequently diagnosed malignancies and common causes of cancer death in women. Recent studies suggest that environmental exposures to certain chemicals, such as 7,12-Dimethylbenzanthracene (DMBA), a chemical present in tobacco, may increase the risk of developing breast cancer later in life. The first-line treatments for breast cancer (surgery, chemotherapy or a combination of both) are generally invasive and frequently associated with severe side effects and high comorbidity. Consequently, novel approaches are strongly required to find more natural-like experimental models that better reflect the tumors’ etiology, physiopathology and response to treatments, as well as to find more targeted, efficient and minimally invasive treatments. This study proposes the development and an in deep biological characterization of an experimental model using DMBA-tumor-induction in Sprague-Dawley female rats. Moreover, a photothermal therapy approach using a near-infrared laser coupled with gold nanoparticles was preliminarily assessed. The gold nanoparticles were functionalized with Epidermal Growth Factor, and their physicochemical properties and in vitro effects were characterized. DMBA proved to be a very good and selective inductor of breast cancer, with 100% incidence and inducing an average of 4.7 tumors per animal. Epigenetic analysis showed that tumors classified with worst prognosis were hypomethylated. The tumor-induced rats were then subjected to a preliminary treatment using functionalized gold nanoparticles and its activation by laser (650–900 nm). The treatment outcomes presented very promising alterations in terms of tumor histology, confirming the presence of necrosis in most of the cases. Although this study revealed encouraging results as a breast cancer therapy, it is important to define tumor eligibility and specific efficiency criteria to further assess its application in breast cancer treatment on other species.

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