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1.
Urol Int ; 2024 Apr 24.
Artículo en Inglés | MEDLINE | ID: mdl-38657590

RESUMEN

Urine storage and excretion require a network of interactions in the urinary tract and the central nervous system (CNS), which is mediated by a reservoir of water in the bladder and the outlet to the bladder neck, urethra and external urethral sphincter. Through communicating and coordinating each other, micturition system eventually showed a switch-like activity pattern. At cervicothoracic and lumbosacral spine, the spinal reflex pathway of the lower urinary tract (LUT) received mechanosensory input from the urothelium to regulate the bladder contraction activity, thereby controlled urination voluntarily. Impairment of above-mentioned any level could result in lower urinary tract dysfunction (LUTD), placed a huge burden on patients and society. Specific expression of purinergic receptors and transient receptor potential (TRP) channels are thought to play an important role in urinary excretion in the lower urinary tract. This article reviewed the knowledge about the voiding reflex and described the role and function of TRP channels during voiding.

2.
J Nanobiotechnology ; 21(1): 399, 2023 Oct 31.
Artículo en Inglés | MEDLINE | ID: mdl-37904235

RESUMEN

BACKGROUNDS: The novel concept of microwave dynamic therapy (MDT) solves the problem of incomplete tumor eradication caused by non-selective heating and uneven temperature distribution of microwave thermal therapy (MWTT) in clinic, but the poor delivery of microwave sensitizer and the obstacle of tumor hypoxic microenvironment limit the effectiveness of MDT. RESULTS: Herein, we engineer a liquid metal-based nanozyme LM@ZIF@HA (LZH) with eutectic Gallium Indium (EGaIn) as the core, which is coated with CoNi-bimetallic zeolite imidazole framework (ZIF) and hyaluronic acid (HA). The flexibility of the liquid metal and the targeting of HA enable the nanozyme to be effectively endocytosed by tumor cells, solving the problem of poor delivery of microwave sensitizers. Due to the catalase-like activity, the nanozyme catalyze excess H2O2 in the tumor microenvironment to generate O2, alleviating the restriction of the tumor hypoxic microenvironment and promoting the production of ROS under microwave irradiation. In vitro cell experiments, the nanozyme has remarkable targeting effect, oxygen production capacity, and microwave dynamic effect, which effectively solves the defects of MDT. In the constructed patient-derived xenograft (PDX) model, the nanozyme achieves excellent MDT effect, despite the heterogeneity and complexity of the tumor model that is similar to the histological and pathological features of the patient. The tumor volume in the LZH + MW group is only about 1/20 of that in the control group, and the tumor inhibition rate is as high as 95%. CONCLUSION: The synthesized nanozyme effectively solves the defects of MDT, improves the targeted delivery of microwave sensitizers while regulating the hypoxic microenvironment of tumors, and achieves excellent MDT effect in the constructed PDX model, providing a new strategy for clinical cancer treatment.


Asunto(s)
Neoplasias de la Mama , Neoplasias , Humanos , Femenino , Neoplasias de la Mama/tratamiento farmacológico , Microondas , Peróxido de Hidrógeno , Neoplasias/tratamiento farmacológico , Metales/uso terapéutico , Línea Celular Tumoral , Microambiente Tumoral
3.
Medicine (Baltimore) ; 102(18): e33710, 2023 May 05.
Artículo en Inglés | MEDLINE | ID: mdl-37144993

RESUMEN

Obesity is associated with cervicalgia and low back pain (LBP), but the specific role and how to reduce the risk of neck pain and low back pain are not clear. The Mendelian randomization analysis was used to investigate the causal relationship between obesity and cervicalgia and LBP, as well as the effect of possible mediating factors. Then, causal associations were estimated using sensitivity analysis. Educational level (odds ratio (OR) = 0.30, 0.23) was negatively associated with cervicalgia and LBP; Heavy physical work (HPW) (OR = 3.24, 2.18), major depression (MD) (OR = 1.47, 1.32), body mass index (BMI) (OR = 1.36, 1.32), and waist circumference (WC) (OR = 1.32, 1.35) were positively associated with cervicalgia and LBP; Leisure sedentary behavior (LSB) (OR = 1.96), smoking (OR = 1.32), and alcohol intake frequency (OR = 1.34) were positively associated only with LBP, but not with cervicalgia. Ranked by mediated proportions of selected mediators, the largest causal mediator from BMI and WC to cervicalgia was educational level (38.20%, 38.20%), followed by HPW (22.90%, 24.70%), and MD (9.20%, 17.90%); However, the largest causal mediator from BMI and WC to LBP was LSB (55.10%, 50.10%), followed by educational level (46.40%, 40.20%), HPW (28.30%, 20.90%), smoking initiation (26.60%, 32.30%), alcohol intake frequency (20.40%, 6.90%), and MD (10.00%, 11.40%). For obese individuals, avoiding HPW and maintaining a stable mood may be an effective approach to prevent cervicalgia; Additionally, reducing LSB, avoiding HPW, quitting smoking and drinking, and maintaining a stable mood may be an effective approach to prevent LBP.


Asunto(s)
Dolor de la Región Lumbar , Humanos , Dolor de la Región Lumbar/etiología , Dolor de la Región Lumbar/complicaciones , Dolor de Cuello/epidemiología , Dolor de Cuello/etiología , Factores de Riesgo , Análisis de la Aleatorización Mendeliana , Obesidad/complicaciones , Obesidad/epidemiología , Índice de Masa Corporal
4.
Kaohsiung J Med Sci ; 39(5): 468-477, 2023 May.
Artículo en Inglés | MEDLINE | ID: mdl-36912344

RESUMEN

Human chorionic gonadotropin (hCG) might affect endometrial receptivity, exerting integral roles in embryo implantation. This study explored the action of hCG in endometrial receptivity via the miR-126-3p/PIK3R2/PI3K/Akt/eNOS axis. The embryo implantation dysfunction (EID) mouse models were established by administrating mifepristone and human endometrial epithelial cells (EECs) were used for in vivo experiments, both followed by hCG treatment. Expression level of CD105 and protein levels of cadherin CD144 and CD146 in mice were determined by immunohistochemistry and Western blot. The levels of miR-126-3p and PIK3R2 mRNA and PIK3R2, p-PI3K p85 α, PI3K p110 α, p-Akt, Akt, p-eNOS, and eNOS protein levels were measured. Cell proliferation was evaluated by CCK-8 and EdU assays. The binding sites of miR-126-3p and PIK3R2 were predicted and verified. hCG-treated EECs were further transfected with miR-126-inhibitor for functional rescue experiments. hCG ameliorated endometrial receptivity in EID mice. Moreover, hCG promoted miR-126-3p and suppressed PIK3R2 in EID mice and EECs. miR-126-3p targeted PIK3R2. EEC proliferation was enhanced after hCG treatment but inhibited by miR-126-3p downregulation. Both in vivo and in vitro experiments validated that hCG activated the PI3K/Akt/eNOS pathway through the miR-126-3p/PIK3R2 axis. Collectively, hCG improves endometrial receptivity by activating the PI3K/Akt/eNOS pathway via regulating miR-126-3p/PIK3R2.


Asunto(s)
MicroARNs , Proteínas Proto-Oncogénicas c-akt , Femenino , Humanos , Animales , Ratones , Proteínas Proto-Oncogénicas c-akt/genética , Proteínas Proto-Oncogénicas c-akt/metabolismo , MicroARNs/genética , MicroARNs/metabolismo , Fosfatidilinositol 3-Quinasas/genética , Fosfatidilinositol 3-Quinasas/metabolismo , Transducción de Señal/genética , Proliferación Celular/genética , Gonadotropina Coriónica/farmacología
5.
World J Clin Cases ; 11(3): 556-565, 2023 Jan 26.
Artículo en Inglés | MEDLINE | ID: mdl-36793635

RESUMEN

BACKGROUND: Stroke is a common and frequently occurring disease of the nervous system and one of the three major diseases leading to human death. The incidence and mortality of stroke in China increase with age. Overall, 70 % of patients with stroke have serious disability, which results in heavy burden to their families and the society. AIM: To analyze the effects of Qixue Shuangbu decoction and acupuncture combined with Western medicine on immune indexes and digestive tract function in patients with acute severe stroke. METHODS: A total of 68 patients with acute severe stroke admitted to Lanzhou Second People's Hospital between March 2018 and September 2021 were selected and divided into the control and observation groups according to a random number table method. The control group was administered routine Western medicine treatment, such as dehydration, lowering intracranial pressure, anticoagulation, improving cerebral blood circulation and cerebral nerve protection according to the "Guidelines for the Diagnosis and Treatment of Acute Ischemic Stroke in China." The observation group was administered Qixue Shuangbu decoction via nasal feeding tube on the basis of the routine Western medicine treatment with simultaneous acupuncture. The two groups were compared. RESULTS: The acute physiology and chronic health evaluation II, organ dysfunction syndrome score, National Institutes of Health Stroke Scale, and traditional Chinese medicine syndrome scores of the two groups were significantly decreased compared with those measured before treatment, and the complements C3 and C4, and immunoglobulins (Ig) M and G were significantly increased compared with those observed before treatment (P < 0.05). After treatment, the scores of the observation group were lower than those of the control group, and the complement and Ig levels were higher than those of the control group (P < 0.05). The levels of diamine oxidase (DAO), D-lactic acid (D-LA), and calcitonin gene-related peptide (CGRP) in the two groups were significantly higher than those before treatment, while the levels of lipopolysaccharide, ubiquitin carboxyl-terminal hydrolase 1 (UCH-L1), tumor necrosis factor-α (TNF-α), interleukin (IL) -2, and IL-8 were significantly lower than those before treatment (P < 0.05). After treatment, DAO, D-LA, and CGRP were higher in the observation group than in the control group, while lipopolysaccharide, UCH-L1, TNF-α, IL-2, and IL-8 were lower than in the control group (P < 0.05). The hospitalization time of individuals in the observation group was shorter than that of the control group (P < 0.05). CONCLUSION: Qixue Shuangbu decoction and acupuncture combined with Western medicine for the treatment of acute severe stroke can regulate intestinal flora, reduce inflammation, improve intestinal mucosal barrier function and immune function related indicators, and promote recovery.

6.
Biomater Sci ; 10(13): 3503-3513, 2022 Jun 28.
Artículo en Inglés | MEDLINE | ID: mdl-35593298

RESUMEN

The presence of high content glutathione (GSH) provides an effective "protective shield" for tumor cells, which undoubtedly is a huge impediment to reactive oxygen species (ROS)-based treatment. Fortunately, divalent copper (Cu2+) can not only consume GSH, destroying the protection mechanism of GSH, but also can be reduced to Cu+ with excellent Fenton-like reaction activity. Hence, capitalizing on the properties of liquid metals, we introduced Cu with three different valances via an in situ replacement reaction. A stable core-shell liquid-metal based "Cu storage pool" was obtained. It can effectively deplete GSH within the cells, and simultaneously produce ·OH through a Fenton-like reaction, further improving the effect of chemodynamic therapy (CDT). Under microwave irradiation, it is also capable of producing a large amount of ROS to promote tumor treatment. In addition, the loading of ionic liquid endows LZC@IL nanoparticles with certain microwave heating performance, which is able to augment microwave thermal therapy (MWTT). With the combination of CDT, microwave dynamic therapy (MDT) and MWTT, LZC@IL has an excellent effect on tumor elimination. This work offers a new idea for the application of liquid metals and the combined treatment of tumors, which has potential application value.


Asunto(s)
Nanopartículas del Metal , Nanopartículas , Neoplasias , Línea Celular Tumoral , Glutatión , Humanos , Peróxido de Hidrógeno , Microondas , Neoplasias/tratamiento farmacológico , Especies Reactivas de Oxígeno
7.
J Biomed Nanotechnol ; 18(2): 369-380, 2022 Feb 01.
Artículo en Inglés | MEDLINE | ID: mdl-35484737

RESUMEN

Microwave (MW) hyperthermia has been widely studied in tumor therapy, while the lack of specificity, and the potential toxicity induced by instability or difficulty in degradation of existed MW thermal sensitizers still limits the application. Herein, a new biocompatible Poly(lactic-co-glycolic acid) (PLGA)-based nanosensitizer of Dtxl-Gd@PLGA-PEG-TPP (DGPPT) with capacities of magnetic resonance (MR) imaging and mitochondrial targeting for MW hyperthermia combined with chemotherapy was constructed via a double emulsion solvent evaporation method. The modified TPP significantly enhanced the specificity of sensitizer for targeting mitochondria, a heat-sensitive energy supply plant in cells. Thus the MW thermal damage induced by the loaded Gd in PLGA nanospheres was also strengthened. Together, the system could also achieve MR imaging due to the existence of Gd. In addition, the encapsulated Dtxl performed the chemotherapy of inhibiting mitochondrial function for assisting with MW hyperthermia. In vivo experiments demonstrated that PLGA had high biocompatibility that no obvious damage occurred even the dose was up to 200 mg/kg. Meanwhile, DGPPT+MW representing the combination of mitochondrial targeting and MW hyperthermia-chemotherapy has also been proved to shrink tumor size effectively. This study provides a new direction for building biosafe and multifunctional MW sensitizer with active targeting ability to impede tumor growth.


Asunto(s)
Hipertermia Inducida , Neoplasias , Humanos , Ácido Láctico , Imagen por Resonancia Magnética/métodos , Microondas , Neoplasias/diagnóstico por imagen , Neoplasias/tratamiento farmacológico , Polietilenglicoles , Ácido Poliglicólico , Copolímero de Ácido Poliláctico-Ácido Poliglicólico
8.
Psychol Health Med ; 27(7): 1596-1601, 2022 08.
Artículo en Inglés | MEDLINE | ID: mdl-33784891

RESUMEN

This study aimed to elaborate on the mechanism by which workplace ostracism influences turnover intention through exploring the sequential mediation effects of emotional labour and nurse-patient relationship. Using a sample of 379 nurses collected from a time-lag survey in a tertiary public hospital in China, we applied structural equation modelling techniques to test our hypothesized model. Our findings revealed that workplace ostracism positively influenced surface acting and deep acting. Workplace ostracism influenced turnover intention through the sequential mediation of surface acting and nurse-patient relationship. The findings of this study imply that nurses should receive education and training in emotional management skills to deal with workplace ostracism. Besides, fostering positive nurse-patient relationships may help reduce nurses' turnover intention.


Asunto(s)
Enfermeras y Enfermeros , Personal de Enfermería en Hospital , Estudios Transversales , Femenino , Humanos , Intención , Satisfacción en el Trabajo , Personal de Enfermería en Hospital/psicología , Ostracismo , Reorganización del Personal , Encuestas y Cuestionarios , Lugar de Trabajo/psicología
9.
Colloids Surf B Biointerfaces ; 207: 112023, 2021 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-34403983

RESUMEN

The maximized therapeutic efficacy in tumor treatment can be achieved with combination therapy. Herein, a metronidazole (MN) and RGD peptides were linked with the copolymer chains of polyacrylic acid (PAA) and polyethylene glycol (PEG) by condensation and Michael addition reactions, respectively, named as RGD-PEG-PAA-MN. Subsequently, liquid-metal (LM) nanoparticles broken by ultrasonication were coated with modified copolymer, forming RGD-PEG-PAA-MN@LM nanoparticles. These nanoparticles with the degradation under an acidic condition could target to tumor cells, and LM of these composited nanoparticles could not only efficiently convert the photoenergy of near infrared (NIR) into thermal energy, but also produce more reactive oxygen species under NIR or X ray irradiation. Furthermore, MN in the composited nanoparticles could enhance their radiation sensitivity of tumor tissues with hypoxia condition. The synergic effect of these nanoparticles on cancer limitation after the sequential radiations of NIR and X ray was significantly higher than the single radiation. In the experiments of tumor bearing mice, the volume of the tumor in RGD-PEG-PAA-MN@LM group at 14th day after two radiations of NIR and X-ray were significantly smaller than LM group, and the tumor of RGD-PEG-PAA-MN@LM group at 14th day after two radiations almost disappeared, suggesting better synergistic effect of RGD-PEG-PAA-MN@LM nanoparticles on photothermal conversion, photodynamics under two irradiations and their enhanced sensitization of X-ray radiation. Our results indicated that the prepared nanoparticles would be applied in the combinational therapy of liver tumor by the photothermal, photodynamic and sensitized radiation.


Asunto(s)
Neoplasias Hepáticas , Nanopartículas del Metal , Nanopartículas , Fotoquimioterapia , Animales , Línea Celular Tumoral , Neoplasias Hepáticas/tratamiento farmacológico , Ratones , Polietilenglicoles , Polímeros
10.
Sichuan Da Xue Xue Bao Yi Xue Ban ; 52(4): 566-569, 2021 Jul.
Artículo en Chino | MEDLINE | ID: mdl-34323032

RESUMEN

Biomedical engineering (BME) (biomedical materials track) is a typical field of interdisciplinary integration. Its specialty education simultaneously undertakes the duo reformation responsibilities for the new engineering education and the new medical education due to its unique strengths in interdisciplinary nature, comprehensive scope of knowledge, and status of being on the cutting edge of technology. We made an analysis, in this paper, of the opportunities and challenges faced by BME (biomedical materials track) specialty education on the basis of the trends and frontiers of development in biomedical materials in the world. From the perspective of new requirements raised by major national strategies and industrial development for the qualifications and competence of professionals specializing in biomedical materials, thorough reflections were made on the specialized education of BME (biomedical materials track) under the background of the new engineering education and the new medical education. Furthermore, we proposed herein to reconstruct the specialized core knowledge system according to the main line of the reactions and the responses between the biomedical materials and human bodies at different levels and set up a series of courses of biomedical materials science centered on Materiobiology as the core. We also proposed to establish a diversified integrated reform model of the training system incorporating production, learning, research and application for highly competent BME (biomedical materials track) professionals. This paper attempts to contribute to the solution of the major issue of how to train the innovative talents and leaders who will pioneer a new round of diagnosis and treatment technology revolution and the development of the medical device industry.


Asunto(s)
Ingeniería Biomédica , Universidades , Ingeniería Biomédica/educación , Curriculum , Humanos , Aprendizaje
11.
Nanotechnology ; 32(41)2021 Jul 20.
Artículo en Inglés | MEDLINE | ID: mdl-34157685

RESUMEN

As a new member in two-dimensional (2D) transition metal dichalcogenides (TMDCs) family, platinum diselenium (PtSe2) has many excellent properties, such as the layer-dependent band gap, high carrier mobility, high photoelectrical coupling, broadband response, etc, thus it shows good promising application in room temperature photodetectors, broadband photodetectors, transistors and other fields. Furthermore, compared with other TMDCs, PtSe2is chemical inert in ambient, showing nano-devices potential with higher performance and stability. However, up to now, the synthesis and its device applications are in its early stage. This review systematically summarized the state of the art of PtSe2from its structure, property, synthesis and potential application. Finally, the current challenges and future perspectives are outlined for the applications of 2D PtSe2.

12.
Biosensors (Basel) ; 11(4)2021 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-33915714

RESUMEN

The electrocardiogram (ECG) electrode, as a sensor, is an important part of the wearable ECG monitoring device. Natural leather is rarely used as the electrode substrate. In this paper, wearable flexible silver electrodes based on cowhide were prepared by sputtering and brush-painting. A signal generator, oscilloscope, impedance test instrument, and ECG monitor were used to build the test platform evaluating the performance of electrodes with six subjects. The lossless waveform transmission can be achieved with our electrodes. Therefore, the Pearson's correlation coefficient calculated with input waveform and output waveform of the electrodes based on the top grain layer (GLE) and the split layer (SLE) of cowhide were 0.997 and 0.998 at 0.1 Hz respectively. The skin electrode impedance (Z) was tested, and the parameters of the equivalent circuit model of the skin electrode interface were calculated by a fitting method, indicating that the Z of the prepared electrodes was comparable with the standard gel electrode when the skin is moist enough. The signal-to-noise ratio of the ECG of the GLE and the SLE were 1.148 and 1.205 times that of the standard electrode in the standing posture, which meant the ECG measured by our electrodes was basically consistent with that measured by the standard electrode.


Asunto(s)
Electrocardiografía/instrumentación , Dispositivos Electrónicos Vestibles , Impedancia Eléctrica , Electrodos , Humanos , Relación Señal-Ruido
13.
J Nurs Manag ; 29(2): 342-350, 2021 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-32955749

RESUMEN

AIM: To explore the cross-level relationships between group organisational citizenship behaviour, emotional intelligence, work engagement and nurse-patient relationship. BACKGROUND: Group-level factors influencing nurse-patient relationship are seldom studied. METHOD: A cross-sectional questionnaire survey was conducted among 1,246 nurses from 55 nursing groups in a 3A hospital in China, and the data were analysed by multilevel analysis. RESULTS: Group organisational citizenship behaviour is positively related to nurse-patient relationship with work engagement as a mediator. Emotional intelligence moderates the relationship between group organisational citizenship behaviour and nurse-patient relationship. Specifically, high emotional intelligence reduces the positive impact of group organisational citizenship behaviour on nurse-patient relationship. CONCLUSIONS: This study provides new insights into the influencing factors of nurse-patient relationship based on the social information processing theory. In groups with high group organisational citizenship, positive work engagement and emotional intelligence, nurses are more likely to deliver better performance in patient care, leading to better nurse-patient relationships. IMPLICATIONS FOR NURSING MANAGEMENT: This study suggests that influencing factors at both group and individual levels should be considered while establishing nurse-patient relationships. A positive group climate and personal ability development significantly improve patient care quality.


Asunto(s)
Inteligencia Emocional , Compromiso Laboral , China , Estudios Transversales , Humanos , Análisis Multinivel , Encuestas y Cuestionarios
14.
Open Forum Infect Dis ; 7(5): ofaa118, 2020 May.
Artículo en Inglés | MEDLINE | ID: mdl-32405510

RESUMEN

BACKGROUND: Hydatid disease is a severe health problem in endemic areas. In recent years, the incidence of this disease in China has been increasing. As the imaging characteristics of pancreatic echinococcosis (PE) are similar to those of cystic diseases, such as cysts, tuberculosis, and tumors, PE is often misdiagnosed and mistreated. METHODS: The clinical manifestations, laboratory tests, radiological findings, and treatment of 19 patients with PE between January 2006 and December 2018 in 2 hospitals were retrospectively analyzed. RESULTS: The mean age of the patients was 38 years, and the ratio of women to men was 2. All patients came from rural areas. Clinical manifestations included cholestatic jaundice, mass, nausea, pain, and swelling. Hemagglutination inhibition test results were positive for all patients. Enzyme-linked immunosorbent assay test results were positive in 17 cases (89.5%). Foci in the pancreas were head in 52.6%, body in 26.3%, body and tail in 15.8%, tail in 5.3%. The size of lesions' diameter ranged from 1 to 12 cm (mean, 6.5 cm). The imaging features of PE included the presence of (a) daughter cysts on abdominal computed tomography (CT) and/or magnetic resonance imaging (MRI); (b) internal cyst wall dissection and ribbon sign on abdominal CT and/or MRI; (c) typical eggshell cyst wall calcification on abdominal CT. CONCLUSIONS: For patients with cystic lesions on CT and/or MRI combined with epidemiological history and positive echinococcosis serology, doctors can correctly diagnose PE earlier. Surgical treatment combined with drugs can reduce the mortality of PE, leading to a better prognosis.

15.
Hua Xi Kou Qiang Yi Xue Za Zhi ; 38(2): 228-232, 2020 Apr 01.
Artículo en Chino | MEDLINE | ID: mdl-32314900

RESUMEN

Branching morphology is important to ensure that the organ can obtain the efficient functional morphology in a limited volume. The submandibular gland is a crucial model for studying the morphological processes of organ branches. Harvesting the submandibular gland from mouse embryo is also an essential research technique. In this paper, a modified method for obtaining the submandibular glands of mouse embryo was introduced, and the whole process of obtaining and establishing in vitro organ culture was briefly introduced to accurately simulate branch morphogenesis for vivo development and related research.


Asunto(s)
Embrión de Mamíferos , Glándula Submandibular , Animales , Ratones , Morfogénesis , Técnicas de Cultivo de Órganos
16.
Nanotechnology ; 31(18): 185602, 2020 May 01.
Artículo en Inglés | MEDLINE | ID: mdl-31958786

RESUMEN

Large capacitance energy storage materials have a great application prospect due to the development of portable devices. An electrochemical deposition method was used to combine amorphous CuCo2S4 with NiMoS4, which was prepared by a two-step hydrothermal method. The resulting grass-like nanowire array structure greatly promotes the utilization rate of active materials. By the addition of two variable valence metal ions, there is an increase in electrolyte touchable active sites and a decrease in the impedance of the electrode materials. Compared with bare NiMoS4, the binder-free composite electrode has a significantly better capacitance characteristic. In particular, the NiMoS4@CuCo2S4-8 has excellent capacity performance with a specific capacitance of 13.14 F cm-2 at the current density of 5 mA cm-2. The electrode shows 73% capacitance retention after 2000 charge-discharge cycles. It is shown that the combined effect of the nanowires and the several variable valence metal ions is effective to increase the specific capacitance of bimetallic sulfides.

17.
CNS Oncol ; 8(3): CNS43, 2019 11 01.
Artículo en Inglés | MEDLINE | ID: mdl-31769726

RESUMEN

Glioblastoma (GBM) is the most common primary malignant brain tumor in adults and carries a dismal prognosis. The EGFR gene is among the most commonly deranged genes in GBM and thus an important therapeutic target. We report the case of a young female with heavily pretreated EGFR-mutated GBM, for whom we initiated osimertinib, an oral, third-generation tyrosine kinase inhibitor that irreversibly inhibits EGFR and has significant brain penetration. We then review some of the main challenges in targeting EGFR, including lack of central nervous system penetration with most tyrosine kinase inhibitors, molecular heterogeneity of GBM and the need for enhanced specificity for the EGFR mutations relevant in GBM.


Asunto(s)
Acrilamidas/uso terapéutico , Compuestos de Anilina/uso terapéutico , Neoplasias Encefálicas/tratamiento farmacológico , Glioblastoma/tratamiento farmacológico , Mutación , Inhibidores de Proteínas Quinasas/uso terapéutico , Adulto , Neoplasias Encefálicas/enzimología , Neoplasias Encefálicas/genética , Neoplasias Encefálicas/patología , Receptores ErbB/antagonistas & inhibidores , Receptores ErbB/genética , Femenino , Glioblastoma/enzimología , Glioblastoma/genética , Glioblastoma/patología , Humanos , Pronóstico
18.
Nano Lett ; 19(8): 5277-5286, 2019 08 14.
Artículo en Inglés | MEDLINE | ID: mdl-31331173

RESUMEN

The cytotoxic reactive oxygen species (ROS) generated by photoactivated sensitizers have been well explored in tumor therapy for nearly half a century, which is known as photodynamic therapy (PDT). The poor light penetration depth severely hinders PDT as a primary or adjuvant therapy for clinical indication. Whereas microwaves (MWs) are advantageous for deep penetration depth, the MW energy is considerably lower than that required for the activation of any species to induce ROS generation. Herein we find that liquid metal (LM) supernanoparticles activated by MW irradiation can generate ROS, such as ·OH and ·O2. On this basis, we design dual-functional supernanoparticles by loading LMs and an MW heating sensitizer ionic liquid (IL) into mesoporous ZrO2 nanoparticles, which can be activated by MW as the sole energy source for dynamic and thermal therapy concomitantly. The microwave sensitizer opens the door to an entirely novel dynamic treatment for tumors.


Asunto(s)
Hipertermia Inducida/métodos , Nanopartículas/uso terapéutico , Neoplasias/terapia , Especies Reactivas de Oxígeno/metabolismo , Circonio/uso terapéutico , Animales , Células Hep G2 , Humanos , Líquidos Iónicos/uso terapéutico , Ratones , Microondas , Nanopartículas/ultraestructura , Neoplasias/metabolismo
19.
Nanoscale ; 11(21): 10183-10189, 2019 May 30.
Artículo en Inglés | MEDLINE | ID: mdl-31112189

RESUMEN

With extensive investigations involving liquid metals (LMs), Ga-based LMs have attracted increasing attention from biomedical researchers because of their good biocompatibility, ideal fluidity, and high thermal conductivity. LMs employed in cancer treatment suffer from high surface tension, thereby yielding unstable nanoparticles (NPs). Here, ZrO2 is coated onto LM NPs to form a stable core-shell nanostructure. In particular, LM NPs coated with ZrO2 and modified by PEG (LM@pZrO2 NPs) still maintain favorable flexibility, which is beneficial for cellular uptake. With regard to the photothermal properties of LM, LM@pZrO2 NPs rapidly warm up and emit the requisite amount of heat under NIR laser radiation. It is confirmed that LM@pZrO2 NPs are more effectively internalized by cells and are beneficial for tumor photothermal therapy. This research provides a coating strategy to fabricate a stable and flexible core-shell LM nanostructure, making it a promising vehicle for nanotheranostics.


Asunto(s)
Materiales Biocompatibles Revestidos , Gadolinio , Hipertermia Inducida , Nanopartículas del Metal , Neoplasias Experimentales , Fotoquimioterapia , Polietilenglicoles , Animales , Gadolinio/química , Gadolinio/farmacología , Células Hep G2 , Humanos , Nanopartículas del Metal/química , Nanopartículas del Metal/uso terapéutico , Ratones , Neoplasias Experimentales/metabolismo , Neoplasias Experimentales/patología , Neoplasias Experimentales/terapia , Polietilenglicoles/química , Polietilenglicoles/farmacología , Circonio/química , Circonio/farmacología
20.
Zhongguo Zhong Yao Za Zhi ; 43(18): 3715-3721, 2018 Sep.
Artículo en Chino | MEDLINE | ID: mdl-30384538

RESUMEN

Taraxaci Herba was derived from the dried Herba of Taraxacum mongolicum, T. borealisinense and several species from the Taraxacum genus. Taraxaci Herba has been widely used in traditional Chinese and folk medicines. According to the different growth and cultivation pattern, Taraxaci Herba could be divided into two species, wild Taraxaci Herba and cultivated Taraxaci Herba. In the present study, an accurate and reliable fingerprint approach was developed using high performance liquid chromatography(HPLC) for quality control of Taraxaci Herba. A total of 9 common peaks were marked, and the similarity of all the Taraxaci Herba samples was above 0.960. The established fingerprint method could be used for quality control of Taraxaci Herba. Furthermore, an HPLC method was established for simultaneous determination of six bioactive compounds, including monocaffeoyl tartaric acid, chlorogenic acid, caffeic acid, cichoric acid, 4,5-dicaffeoylquinic acid and luteolin in wild Taraxaci Herba and cultivated Taraxaci Herba. Moreover,chemometrics analysis such as principal component analysis and orthogonal partial least squares discriminant analysis were performed to compare and discriminate the wild samples and cultivated samples based on the quantitative data. The chemometrics results indicated that 4,5-dicaffeoylquinic acid and luteolin were significant to effectively discriminate the wild Taraxaci Herba and cultivated Taraxaci Herba samples, and these two compounds could be recognized as chemical markers for quality evaluation of wild Taraxaci Herba and cultivated Taraxaci Herba. The fingerprint analysis and quantitative analysis of multi-components could be a well-acceptable strategy for evaluation the quality of Taraxaci Herba.


Asunto(s)
Medicamentos Herbarios Chinos/química , Fitoquímicos/química , Taraxacum/química , Cromatografía Líquida de Alta Presión , Análisis de los Mínimos Cuadrados , Fitoquímicos/aislamiento & purificación , Análisis de Componente Principal , Control de Calidad
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