February 2025
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14 Reads
Analytical Chemistry
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February 2025
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14 Reads
Analytical Chemistry
January 2025
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6 Reads
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1 Citation
Analytical Chemistry
January 2025
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4 Reads
Analytical Chemistry
Accompanying with the occurrence of inflammatory reaction to release cytokine, pyroptosis can activate immune response for resistance against cancer. Consequently, elevated levels of cytokine released by cancer cells are highly correlated with the effectiveness of cancer treatment. Herein, a non-invasive surface-enhanced Raman spectroscopy (SERS) immunosensor was developed to sensitively and specifically measure the tumor necrosis factor-α (TNF-α), a proinflammatory cytokine, during cell pyroptosis process. The sandwiched structure of the sensor is functionalized with TNF-α binding antibody for detecting TNF-α at concentrations as low as 1 pg/mL. Importantly, electrical stimulation (ES) can fleetly trigger cancer cell pyroptosis to induce overexpression of receptor interacting protein 3 (RIP3), which is a significant protein that regulates the inflammatory response. The overexpression RIP3 can activate caspase-1 to promote the up-regulation of cytokine levels. Notably, the cytokine levels of TNF-α released from cancer cells (MCF-7 cells) were apparently higher than normal cell (MCF-10A cells) during pyroptosis detected by the SERS immunosensors. Due to its obvious superiorities of simple fabrication and fast readout without sample pretreatment, the developed SERS platform has the potential application value for diagnosis and treatment of cancer.
November 2024
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14 Reads
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2 Citations
Analytical Chemistry
November 2024
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20 Reads
Nanofluidic devices have turned out to be exemplary systems for investigating fluidic transport properties in a highly restricted area, where the electrostatic interactions or chemical reactions between nanochannel and flowing species strongly dominate the ions and flow transport. Numerous nanofluidic devices have recently been explored to manipulate ion currents and construct electronic devices. Enlightened by electronic field effect transistors, utilizing the electric field effect of nanopore nanochannels has also been adopted to develop versatile nanofluidic devices. Here, we report a nanopore-based nanofluidic unijunction transistor composed of a conical glass nanopipette with the biomaterial polydopamine (PDA) coated at its outer surface. The as-fabricated nanofluidic device exhibited negative differential resistance (NDR) and ion current oscillation (ICO) in ionic transport. The pre-doped copper ions in the PDA moved toward the tip as increasing the potential, having a robust shielding effect on the charge of the tip, thus affecting the surface charge density of the nanopore in the working zone. Finite element simulation based on a continuum model coupled with Stokes–Brinkman and Poisson–Nernst–Planck (PNP) equations revealed that the fluctuations in charge density remarkably affect the transport of ionic current in the nanofluidic device. The as-prepared nanofluidic semiconductor device was a ready-to-use equipment that required no additional external conditions. Our work provides a versatile and convenient way to construct nanofluidic electronic components; we believe by taking advantage of advanced surface modification methods, the oscillation frequency of the unijunction transistors could be controlled on demand, and more nanofluidic devices with resourceful functions would be exploited.
August 2024
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20 Reads
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4 Citations
Analytical Chemistry
Pyroptosis of programmed cell death has been recognized as a more effective way to inhibit the occurrence and development of tumors than the better-studied apoptosis. However, it is still challenging to quickly and effectively trigger pyroptosis of cancer cells for high-efficacy cancer treatment. Here, we report on the first use of mild constant-potential electrostimulation (cp-ES) to quickly trigger cancer-cell pyroptosis with a probability up to 11 ∼91.4% and significantly shortened time (within 1 h), ∼3−6 times faster than typical drug stimulation to induce pyroptosis. We find that the ES-induced cancer-cell pyroptosis is through the activated caspase-3 (pathway) cleavage of gasdermin E (GSDME) to form an N-terminal fragment (GSDME-N) and observe nuclear shrinkage and reduction of the number of nucleoli as well as down-/up regulated expression of two important nucleoproteins of nucleolin and nucleophosmin (NPM1). The study enriches the basic understanding of pyroptosis and provides a new avenue for potential effective treatment of cancer.
May 2024
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75 Reads
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2 Citations
Analytical Chemistry
March 2024
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19 Reads
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5 Citations
Analytica Chimica Acta
January 2024
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10 Reads
Analytical Chemistry
January 2024
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78 Reads
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31 Citations
A wearable biological patch capable of producing multiple responses to light and electricity without interfering with daily activities is highly desired for skin cancer treatment, but remains a key challenge. Herein, the skin-mountable electrostimulation-augmented photothermal patch (eT-patch) comprising transparent ionic gel with MXene (Ti3C2Tx) doping is developed and applied for the treatment of melanoma under photostimulation at 0.5 W/cm². The eT-patch designed has superior photothermal and electrical characteristics owing to ionic gels doped with MXene which provides high photothermal conversion efficiency and electrical conductivity as a medium. Simultaneously, the ionic gel-based eT-patch having excellent optical transparency actualizes real-time observation of skin response and melanoma treatment process under photothermal and electrical stimulation (PES) co-therapy. Systematical cellular study on anti-tumor mechanism of the eT-patch under PES treatment revealed that eT-patch under PES treatment can synergically trigger cancer cell apoptosis and pyroptosis, which together lead to the death of melanoma cells. Due to the obvious advantages of relatively safe and less side effects in healthy organs, the developed eT-patch provides a promising cost-effective therapeutic strategy for skin tumors and will open a new avenue for biomedical applications of ionic gels.
... When exosomal miRNAs of cancer cells and normal cells were analyzed, exosomes derived from cancer cells were richer in miRNAs. In addition, exosomal miRNA levels were found to increase when cells were subjected to electrical stimulation [81]. miRNA-seq was performed on urinary exosomes from renal-cell carcinoma patients and healthy controls, and an increased expression of miR-542-5p and decreased expression of miR-320a were observed in cancer patients [82]. ...
November 2024
Analytical Chemistry
... Additionally, MX's large surface area and tunable chemistry allow for facile functionalization and loading of therapeutic agents [ 21 ] as a platform for dual-mode cancer therapy [ 22 , 23 ]. For examples, MX was used for the photothermal and electrical stimulation co-therapy [ 24 ], PTT and enzymatic dynamic therapy accompanied by photoacoustic imaging [ 25 ], and synergistic sonodynamic/chemo dynamic therapy [ 26 ]. However, the direct use of MX in cancer therapy has been limited by challenges such as the aggregation in the physiological environment, the reduced stability, and the difficulty in combining its photothermal properties with long termcontrolled drug delivery [ 27 ]. ...
January 2024
... Traditional studies of this kind mostly focused on the modification of the inner channel wall of the nanopores, since they come into contact with the transported ions directly and are easily manipulated to regulate the transmission behaviors. Although the deposition of a layer of metal such as gold on the outer surface of solid-state nanopores followed by grafting nucleic acids or metal-organic framework on the metal layer has been implemented in some studies to improve detection sensitivity [36−38], the contribution of the elements on the outer surface of glass nanopipette was always ignored [39] and has not been exploited for the design of potential new nanofluidic devices. So far, most nanofluidic devices with complex functions and modification steps were concentrated on polyethylene terephthalate (PET) nanopores or carbon nanotubes, while for the glass nanopipettes, they function only by simply changing the solution conditions [17]. ...
March 2024
Analytica Chimica Acta
... There was an urgent need to develop new candidate drugs for the treatment of esophageal cancer. NCL was a multifunctional nuclear protein that was overexpressed in the cell membrane, cytoplasm, and nucleus of cancer cells and played an important role in regulating the physiological activities of cells [26]. Considering the key role of NCL in cancer development, some studies have studied NCL as a key receptor for therapeutic agents and imaging probes. ...
December 2023
Analytical Chemistry
... 75 Concerning the combination of NIR and ES, a Ti 3 C 2 T x acid acrylic ionic gel enhanced skin wound healing due to combined NIR antibacterial effects on E. coli and S. aureus and increased cell migration due to ES in infected mice. 74 In this study, while the inflammation and necrotic tissue were evident in the wounds in the control, only the combined ES and PTT, decreased the margins of the wound with enhanced collagen deposition, lower expression of TNF-α and upregulation of FGF-2. ...
December 2023
eScience
... [37,38] Previous studies have shown that the concentration of miRNA-21 is rising during the apoptosis process of tumor cells. [39] Therefore, we designed DNA probe (MB-21) with miRNA-21 dectection ability to verify the capability of USD to induce apoptosis ( Figure S22 and S23), and the results were validated using standard RT-qPCR test (Figure S24). The results confirmed a significant upregulation of miRNA content in HeLa cells treated with USD plus NIR, demonstrating the ability of USD to promote apoptosis. ...
October 2023
Analytical Chemistry
... Metal-organic frameworks (MOFs) offer significant advantages over other nanocarriers used for cancer treatment. They possess a highly porous structure, allowing for high drug loading capacity and controlled release, which is crucial for targeted therapy [14]. Our platform utilizes the photodynamic and photothermal properties of this composite MOFs, which then enhanced by copper doping and gold nanoparticle decoration [15,16]. ...
July 2023
... Monitoring the dynamic changes of active components within a biological system is crucial in drug development. SERS technology, with its high temporal resolution, is particularly suited for real-time monitoring of molecular dynamics [71,72]. This includes processes such as absorption, distribution, metabolism, and excretion (ADME) of drugs [73]. ...
May 2023
Analytical Chemistry
... Table S1 (in Supplementary Materials) summarizes the comparison between Trolox detection performance using different methods [12,19,[52][53][54]. The LOD obtained using the fabricated sensor is lower than that obtained by differential pulse voltammetry (DPV) detection using a copper-neocuproine complex ([Cu(Nc) 2 ] 2+ ) probe [52], or a square-wave voltammetry (SWV) detection using a 2,2-diphenyl-1-picrylhydrazyl (DPPH) probe [19], or electrochemiluminescence (ECL) detection based on luminol emitter [53,54], or colorimetric detection using Fe(III)(phen) 3 probe [12]. Thus, the fabricated sensor also has advantages of convenient fabrication, simple detection, and high sensitivity, demonstrating great potential for TAC determination. to measure the electrochemical oxidation current of Fe(II)(phen)3 using chronoamperometry. ...
March 2023
ACS Applied Nano Materials
... Based on the literature, it has been observed that tumor cells exhibit a comparatively higher susceptibility to external stimulation than normal cells, particularly with regards to their cytoskeletal structure [197]. For instance, Jin's group from State Key Laboratory of Electroanalytical Chemistry of Chinese Academy of Sciences [198] demonstrated that electrostimulation (ES) significantly inhibits glucose and energy metabolism in cancer cells, resulting in rapid cell death (Figure 8A-C). From a mechanical perspective, ES leads to cytoskeletal disruption (Figure 8D), which reduces the Young's modulus of MCF-7 cell membranes ( Figure 8E) due to the depolymerization of F-actin and the down regulation and irregular distribution of glucose transporter 1 (GLUT1) (Figure 8F). ...
April 2023