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1.
Nano Lett ; 24(19): 5774-5782, 2024 May 15.
Artículo en Inglés | MEDLINE | ID: mdl-38709116

RESUMEN

Flexible shortwave infrared detectors play a crucial role in wearable devices, bioimaging, automatic control, etc. Commercial shortwave infrared detectors face challenges in achieving flexibility due to the high fabrication temperature and rigid material properties. Herein, we develop a high-performance flexible Te0.7Se0.3 photodetector, resulting from the unique 1D crystal structure and small elastic modulus of Te-Se alloying. The flexible photodetector exhibits a broad-spectrum response ranging from 365 to 1650 nm, a fast response time of 6 µs, a broad linear dynamic range of 76 dB, and a specific detectivity of 4.8 × 1010 Jones at room temperature. The responsivity of the flexible detector remains at 93% of its initial value after bending with a small curvature of 3 mm. Based on the optimized flexible detector, we demonstrate its application in shortwave infrared imaging. These results showcase the great potential of Te0.7Se0.3 photodetectors for flexible electronics.

2.
Small ; 20(9): e2308070, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-37849040

RESUMEN

Short-wavelength infrared photodetectors play a significant role in various fields such as autonomous driving, military security, and biological medicine. However, state-of-the-art short-wavelength infrared photodetectors, such as InGaAs, require high-temperature fabrication and heterogenous integration with complementary metal-oxide-semiconductor (CMOS) readout circuits (ROIC), resulting in a high cost and low imaging resolution. Herein, for the first time, a low-cost, high-performance, high-stable, and thin-film transistor (TFT) ROIC monolithic-integrated (Bi,Sb)2 Se3 alloy thin-film short-wavelength infrared photodetector is reported. The (Bi,Sb)2 Se3 alloy thin-film short-wavelength infrared photodetectors demonstrate a high external quantum efficiency (EQE) of 21.1% (light intensity of 0.76 µW cm-2 ) and a fast response time (3.24 µs). The highest EQE is about two magnitudes than that of the extrinsic photoconduction of Sb2 Se3 (0.051%). In addition, the unpackaged devices demonstrate high electric and thermal stability (almost no attenuation at 120 °C for 312 h), showing potential for in-vehicle applications that may experient such a high temperature. Finally, both the (Bi,Sb)2 Se3 alloy thin film and n-type CdSe buffer layer are directly deposited on the TFT ROIC (with a 64 × 64-pixel array) with a low-temperature process and the material identification and imaging applications are presented. This work is a significant breakthrough in ROIC monolithic-integrated short-wavelength infrared imaging chips.

3.
Cancer Sci ; 114(5): 2109-2122, 2023 May.
Artículo en Inglés | MEDLINE | ID: mdl-36625184

RESUMEN

Non-small-cell lung cancer (NSCLC) is one of the deadliest cancers worldwide, and metastasis is considered one of the leading causes of treatment failure in NSCLC. Wnt/ß-catenin signaling is crucially involved in epithelial-mesenchymal transition (EMT), a crucial factor in promoting metastasis, and also contributes to resistance developed by NSCLC to targeted agents. Frizzled-7 (Fzd7), a critical receptor of Wnt/ß-catenin signaling, is aberrantly expressed in NSCLC and has been confirmed to be positively correlated with poor clinical outcomes. SHH002-hu1, a humanized antibody targeting Fzd7, was previously successfully generated by our group. Here, we studied the anti-tumor effects of SHH002-hu1 against NSCLC and revealed the underlying mechanism. First, immunofluorescence (IF) and near-infrared (NIR) imaging assays showed that SHH002-hu1 specifically binds Fzd7+ NSCLC cells and targets NSCLC tissues. Wound healing and transwell invasion assays indicated that SHH002-hu1 significantly inhibits the migration and invasion of NSCLC cells. Subsequently, TOP-FLASH/FOP-FLASH luciferase reporter, IF, and western blot assays validated that SHH002-hu1 effectively suppresses the activation of Wnt/ß-catenin signaling, and further attenuates the EMT of NSCLC cells. Finally, the subcutaneous xenotransplanted tumor model of A549/H1975, as well as the popliteal lymph node (LN) metastasis model, was established, and SHH002-hu1 was demonstrated to inhibit the growth of NSCLC xenografts and suppress LN metastasis of NSCLC. Above all, SHH002-hu1 with selectivity toward Fzd7+ NSCLC and the potential of inhibiting invasion and metastasis of NSCLC via disrupting Wnt/ß-catenin signaling, is indicated as a good candidate for the targeted therapy of NSCLC.


Asunto(s)
Antineoplásicos , Carcinoma de Pulmón de Células no Pequeñas , Neoplasias Pulmonares , Humanos , Anticuerpos/farmacología , Antineoplásicos/farmacología , beta Catenina/genética , Carcinoma de Pulmón de Células no Pequeñas/genética , Línea Celular Tumoral , Movimiento Celular , Proliferación Celular , Transición Epitelial-Mesenquimal , Regulación Neoplásica de la Expresión Génica , Neoplasias Pulmonares/genética , Vía de Señalización Wnt
4.
Small ; 18(2): e2102340, 2022 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-34561947

RESUMEN

Solution-processed colloidal quantum dots (CQDs) are promising candidates for the third-generation photovoltaics due to their low cost and spectral tunability. The development of CQD solar cells mainly relies on high-quality CQD ink, smooth and dense film, and charge-extraction-favored device architectures. In particular, advances in the processing of CQDs are essential for high-quality QD solids. The phase transfer exchange (PTE), in contrast with traditional solid-state ligand exchange, has demonstrated to be the most promising approach for high-quality QD solids in terms of charge transport and defect passivation. As a result, the efficiencies of Pb chalcogenide CQD solar cells have been rapidly improved to 14.0%. In this review, the development of the PTE method is briefly reviewed for lead chalcogenide CQD ink preparation, film assembly, and device construction. Particularly, the key roles of lead halides and additional additives are emphasized for defect passivation and charge transport improvement. In the end, several potential directions for future research are proposed.

5.
Small ; 18(48): e2205356, 2022 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-36251788

RESUMEN

Lead selenide (PbSe) colloidal quantum dots (CQDs) are promising candidates for optoelectronic applications. To date, PbSe CQDs capped by halide ligands exhibit improved stability and solar cells using these CQDs as active layers have reported a remarkable power conversion efficiency (PCE) up to 10%. However, PbSe CQDs are more prone to oxidation, requiring delicate control over their processability and compromising their applications. Herein, an efficient strategy that addresses this issue by an in situ cation-exchange process is reported. This is achieved by a two-phase ligand exchange process where PbI2 serves as both a passivating ligand and cation-source inducing transformation of CdSe to PbSe. The defect density and carrier lifetime of PbSe CQD films are improved to 1.05 × 1016  cm-3 and 12.2 ns, whereas the traditional PbSe CQD films possess 1.9 × 1016  cm-3 defect density and 10.2 ns carrier lifetime. These improvements are translated into an enhancement of photovoltaic performance of PbSe solar cells, with a PCE of up to 11.6%, ≈10% higher than the previous record. Notably, the approach enables greatly improved stability and a two-month stability is successfully demonstrated. This strategy is expected to promote the fast development of PbSe CQD applications in low-cost and high-performance optoelectronic devices.

6.
Faraday Discuss ; 239(0): 317-327, 2022 Oct 28.
Artículo en Inglés | MEDLINE | ID: mdl-35822658

RESUMEN

Recently, selenium (Se) has regained interest as a possible wide-bandgap photovoltaic material for silicon-based tandem applications. However, the easy sublimation of Se below the melting point (220 °C) brings challenges for high-quality Se thin films. Herein, we design a rapid thermal annealing (RTA) method to balance the contradiction between the sublimation and crystallization of Se thin films. Through optimizing the annealing temperature, a high-quality Se thin film is obtained with a large grain size (∼1 µm) and preferred [003] orientation during the RTA process. Then, an optimized efficiency of 3.22% is achieved in a ZnO/Se heterojunction solar cell. This study provides a new guide to obtain high-quality Se thin film by RTA and the method can be extended to other materials with high saturated vapor pressure.

7.
Molecules ; 26(21)2021 Oct 29.
Artículo en Inglés | MEDLINE | ID: mdl-34770975

RESUMEN

Acyclovir (ACV) is an effective and selective antiviral drug, and the study of its toxicology and the use of appropriate detection techniques to control its toxicity at safe levels are extremely important for medicine efforts and human health. This review discusses the mechanism driving ACV's ability to inhibit viral coding, starting from its development and pharmacology. A comprehensive summary of the existing preparation methods and synthetic materials, such as 5-aminoimidazole-4-carboxamide, guanine and its derivatives, and other purine derivatives, is presented to elucidate the preparation of ACV in detail. In addition, it presents valuable analytical procedures for the toxicological studies of ACV, which are essential for human use and dosing. Analytical methods, including spectrophotometry, high performance liquid chromatography (HPLC), liquid chromatography/tandem mass spectrometry (LC-MS/MS), electrochemical sensors, molecularly imprinted polymers (MIPs), and flow injection-chemiluminescence (FI-CL) are also highlighted. A brief description of the characteristics of each of these methods is also presented. Finally, insight is provided for the development of ACV to drive further innovation of ACV in pharmaceutical applications. This review provides a comprehensive summary of the past life and future challenges of ACV.


Asunto(s)
Aciclovir/efectos adversos , Aciclovir/análisis , Antivirales/efectos adversos , Antivirales/análisis , Aciclovir/síntesis química , Antivirales/síntesis química , Humanos , Estructura Molecular
8.
Orthopade ; 48(10): 862-867, 2019 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-31119305

RESUMEN

BACKGROUND: To explore the clinical effects of 3D printing techniques on the correction of complex malformation. METHOD: A computed tomography (CT) scan was used to collect data on malformations of patients and the orthopedic plan was made by virtual manipulation of the reality before surgery. The results of the virtual orthopedics were compared with the expected results. A guide plate for osteotomy was also utilized when necessary. The actual operation was carried out according to the plan. RESULTS: The average age of the 11 patients was 19.09 years (19.09 ± 6.93 years) and the average follow-up was 16 months (16 ± 15.11 months). The symptoms were obviously improved. The preoperative World Health Organization Disability Assessment Schedule (WHODAS 2.0) score, modified Barthel index and Functional Independence Measure (FIM) score in patients were 70.45 ± 15.75, 96.55 ± 3.78 and 121.36 ± 4.15, respectively and correspondingly 53 ± 12.75, 98.82 ± 1.66 and 123.82 ± 4.60 after surgery, respectively. There were significant differences before and after surgery (P < 0.05). CONCLUSION: The use of 3D printing technology can provide intuitive and accurate help for the correction of complex limb malformations and greatly facilitates the communication between doctors and patients. The FIM score is suitable for the evaluation of the curative effect before and after the treatment of patients with complex malformations.


Asunto(s)
Placas Óseas , Extremidad Inferior/cirugía , Osteotomía/métodos , Impresión Tridimensional , Tomografía Computarizada por Rayos X , Extremidad Superior/cirugía , Adulto , Evaluación de la Discapacidad , Humanos , Deformidades Congénitas de las Extremidades , Extremidad Inferior/lesiones , Evaluación del Resultado de la Atención al Paciente , Resultado del Tratamiento , Extremidad Superior/lesiones , Adulto Joven
9.
Med Sci Monit ; 24: 2294-2301, 2018 Apr 16.
Artículo en Inglés | MEDLINE | ID: mdl-29659560

RESUMEN

BACKGROUND Bladder cancer caused by exposure to aniline dyes, chronic cystitis, and smoking is detected in approximately 70 000 new cases annually. In the USA alone, it leads to 15 000 deaths every year. In the present study, we investigated the role of 3-((4'-amino-[1,1'-biphenyl]-4-yl)amino)-4-bromo-5-oxo-2,5-dihydrofuran-2-yl acetate (ABDHFA) in the inhibition of bladder cancer cell viability. MATERIAL AND METHODS Viability of cells was examined using MTT assay and distribution of cell cycle was assessed by flow cytometry. Expression of cyclin D1, androgen, prostate-specific antigen (PSA), and miR-449a was analyzed using Western blot and quantitative real-time polymerase chain reaction assays. RESULTS The results demonstrated that ABDHFA treatment inhibited viability of UMUC3 and TCCSUP AR-positive bladder cancer cells. ABDHFA treatment led to break-down of AR in UMUC3 and TCCSUP cells after 48 h in a dose-dependent manner. Up-regulation of miR-449a by lentivirus transfection down-regulated the AR signalling pathway. In UMUC3 and TCCSUP cells, ABDHFA treatment led to inhibition of mRNA and protein expression corresponding to AR. CONCLUSIONS In summary, the present study demonstrates that proliferation of AR-positive bladder carcinoma cells is markedly reduced by ABDHFA treatment through arrest of cell cycle and degradation of AR protein. Thus, ABDHFA, a novel compound, can be used for the treatment of bladder cancer.


Asunto(s)
Glucosamina/farmacología , MicroARNs/biosíntesis , Receptores Androgénicos/metabolismo , Neoplasias de la Vejiga Urinaria/tratamiento farmacológico , Neoplasias de la Vejiga Urinaria/metabolismo , Acetatos/farmacología , Apoptosis/efectos de los fármacos , Ciclo Celular/efectos de los fármacos , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Supervivencia Celular/efectos de los fármacos , Ciclina D1/biosíntesis , Ciclina D1/genética , Furanos/farmacología , Humanos , Calicreínas/biosíntesis , Calicreínas/genética , MicroARNs/genética , Antígeno Prostático Específico/biosíntesis , Antígeno Prostático Específico/genética , ARN Mensajero/biosíntesis , ARN Mensajero/genética , Receptores Androgénicos/genética , Transducción de Señal , Regulación hacia Arriba , Neoplasias de la Vejiga Urinaria/genética , Neoplasias de la Vejiga Urinaria/patología
10.
BMC Musculoskelet Disord ; 18(1): 297, 2017 Jul 11.
Artículo en Inglés | MEDLINE | ID: mdl-28697792

RESUMEN

BACKGROUND: To explore the association between the rupture of posterior cruciate ligament (PCL) and the radial displacement of medial meniscus under the conditions of different flexion and various axial loads. METHODS: The radial displacement value of medial meniscus was measured for the specimens of normal adult knee joints, including 12 intact PCLs, 6 ruptures of the anterolateral bundle (ALB), 6 ruptures of the postmedial bundle (PMB), and 12 complete ruptures. The measurement was conducted at 0°, 30°, 60°, and 90° of knee flexion angles under 200 N, 400 N, 600 N, 800 N and 1000 N of axial loads respectively. RESULTS: The displacement values of medial meniscus of the ALB rupture group increased at 0° flexion under 800 N and 1000 N, and at 30°, 60° and 90° flexion under all loads in comparison with the PCL intact group. The displacement values of the PMB rupture group was higher at 0° and 90° flexion under all loads, and at 30° and 60° flexion under 800 N and 1000 N loads. The displacement of the PCL complete rupture group increased at all flexion angles under all loads. CONCLUSIONS: Either partial or complete rupture of the PCL can increase in the radial displacement of the medial meniscus, which may explain the degenerative changes that occuring in the medial meniscus due to PCL injury. Therefore, early reestablishment of the PCL is necessarily required in order to maintain stability of the knee joint after PCL injury.


Asunto(s)
Ligamento Cruzado Posterior/lesiones , Ligamento Cruzado Posterior/patología , Lesiones de Menisco Tibial/patología , Adulto , Fenómenos Biomecánicos/fisiología , Femenino , Humanos , Masculino , Meniscos Tibiales/patología , Meniscos Tibiales/fisiología , Ligamento Cruzado Posterior/fisiología , Rotura/patología , Lesiones de Menisco Tibial/fisiopatología
11.
BMC Musculoskelet Disord ; 18(1): 533, 2017 Dec 16.
Artículo en Inglés | MEDLINE | ID: mdl-29246142

RESUMEN

BACKGROUND: Osteoarthritis (OA) is the most prevalent chronic joint disease in China. The aim of this study was to examine the association between metabolic syndrome (MetS) and knee OA in a population-based Chinese study. METHODS: Data included in this analysis is from a cross-sectional study, i.e., the Xiangya Hospital Health Management Center Study. MetS was diagnosed according to the criteria defined by the Chinese Diabetes Society. Radiographic knee OA was defined as changes equivalent to Kellgren-Lawrence (K-L) grade 2 or above at least one side. Associations between MetS and its components with OA were evaluated by conducting multivariable adjusted logistic regression. RESULTS: A total of 5764 participants were included in the present study. The unadjusted OR (1.27, 95%CI: 1.10-1.47, P = 0.001), age-sex adjusted OR (1.17, 95%CI: 1.01-1.36, P = 0.041) and multivariable adjusted OR (1.17, 95%CI: 1.01-1.36, P = 0.043) all suggested a positive association between MetS and knee OA. Besides, its components (e.g., overweight, hypertension and dyslipidemia) were also associated with the prevalence of radiographic knee OA respectively, after adjusting for some confounding factors. In addition, with the accumulation of MetS components, the prevalence of knee OA increased. Furthermore, MetS as a whole was associated with the prevalence of knee osteophyte (OSP) (OR = 1.72, 95%CI: 1.42-2.09, P < 0.001), but not joint space narrowing (JSN) (OR = 1.06, 95%CI: 0.91-1.23, P = 0.449). CONCLUSIONS: The findings of the present study indicated that there was a positive association between the prevalence of MetS and knee OA. However, MetS as a whole was associated with the higher prevalence of knee OSP, but not JSN, which should shed light on our understanding the association between MetS and OA.


Asunto(s)
Glucemia/metabolismo , Síndrome Metabólico/sangre , Síndrome Metabólico/epidemiología , Osteoartritis de la Rodilla/sangre , Osteoartritis de la Rodilla/epidemiología , Estudios Transversales , Femenino , Humanos , Masculino , Síndrome Metabólico/diagnóstico , Persona de Mediana Edad , Osteoartritis de la Rodilla/diagnóstico
12.
J Foot Ankle Surg ; 56(2): 319-326, 2017.
Artículo en Inglés | MEDLINE | ID: mdl-28231965

RESUMEN

A better understanding of displaced intra-articular calcaneal fractures, their effect on joint mechanics, and the relationship between altered mechanics and osteoarthritis could aid in the development or refinement of treatment methods. Finite element modeling is accepted as the reference standard for evaluating joint contact stresses. The objective of the present study was to analyze the in vivo joint mechanical data from finite element modeling for normal and injured subtalar joints. A 3-dimensional model of the ankle-hindfoot was developed and validated. Both height loss and width increases in the calcaneus were simulated. Next, they were used to investigate the relationship between calcaneal height or width and the contact mechanics of the posterior facet of the subtalar joint. The contact area/joint area ratio increased in the subtalar joint with injury when the calcaneal width increased. Moreover, the peak contact pressure and the proportion of the area under high contact pressure (>6 MPa) increased. The contact area/joint area ratio decreased with reduced calcaneal height, but the peak contact pressure remained almost constant. The width increases of the calcaneus somewhat limited the subtalar joint motion, especially for eversion; however, the height loss mostly resulted in subtalar rotatory instability. The height loss diminished the subtalar joint's stability in eversion, internal rotation, and external rotation. The results of the present study support the advisability of surgery for these complex injuries. Reestablishing the calcaneal height and width could restore the normal kinematics and contact stress distribution in the subtalar joint, improve the tibiotalar position, and diminish long-term degeneration in the ankle.


Asunto(s)
Calcáneo/fisiopatología , Simulación por Computador , Análisis de Elementos Finitos , Fracturas Óseas/fisiopatología , Adulto , Articulación del Tobillo/diagnóstico por imagen , Fenómenos Biomecánicos/fisiología , Calcáneo/diagnóstico por imagen , Calcáneo/lesiones , Fracturas Óseas/diagnóstico por imagen , Humanos , Imagenología Tridimensional , Masculino , Articulación Talocalcánea/diagnóstico por imagen , Articulación Talocalcánea/fisiopatología , Articulaciones Tarsianas/diagnóstico por imagen , Tomografía Computarizada por Rayos X
13.
Zhong Nan Da Xue Xue Bao Yi Xue Ban ; 42(4): 445-450, 2017 Apr 28.
Artículo en Zh | MEDLINE | ID: mdl-28490704

RESUMEN

OBJECTIVE: To establish a database for pelvic trauma in Hunan Province, and to start the work of multicenter pelvic trauma registry.
 Methods: To establish the database, literatures relevant to pelvic trauma were screened, the experiences from the established trauma database in China and abroad were learned, and the actual situations for pelvic trauma rescue in Hunan Province were considered. The database for pelvic trauma was established based on the PostgreSQL and the advanced programming language Java 1.6.
 Results: The complex procedure for pelvic trauma rescue was described structurally. The contents for the database included general patient information, injurious condition, prehospital rescue, conditions in admission, treatment in hospital, status on discharge, diagnosis, classification, complication, trauma scoring and therapeutic effect. The database can be accessed through the internet by browser/servicer. The functions for the database include patient information management, data export, history query, progress report, video-image management and personal information management.
 Conclusion: The database with whole life cycle pelvic trauma is successfully established for the first time in China. It is scientific, functional, practical, and user-friendly.


Asunto(s)
Pelvis/lesiones , Sistema de Registros , China , Humanos
14.
Med Sci Monit ; 22: 4369-4379, 2016 Nov 15.
Artículo en Inglés | MEDLINE | ID: mdl-27843134

RESUMEN

BACKGROUND The aim of this study was to investigate bone mineral density (BMD) and the biomechanical and histological effects of posterior cruciate ligament (PCL) rupture on the lateral femoral condyle. MATERIAL AND METHODS Strain on different parts of the lateral femoral condyle from specimens of normal adult knee joints, including 12 intact PCLs, 6 ruptures of the anterolateral bundle, 6 ruptures of the postmedial bundle, and 12 complete ruptures, was tested when loaded with different loads on the knee at various flexion angles. Lateral femoral condyles were also collected randomly from both the experimental side in which the PCLs were transected and the control side from 4 sets of 12 matched-mode pairs of rabbits at 4, 8, 16, and 24 weeks after surgery, and their BMD and morphological and histological changes were observed. RESULTS Partial and complete rupture of the PCL may cause an abnormal load on all parts of the lateral femoral condyle with any axial loading at all positions. Noticeable time-dependent degenerative histological changes of the lateral femoral condyle were observed in the rabbit model of PCL rupture. All of the PCL rupture groups had a higher expression of matrix metalloproteinase-7 (MMP-7) and collagen type II than the control group at all time points (P<0.05), but no significant difference in BMD (P>0.05). CONCLUSIONS Rupture of the PCL may trigger a coordinated response of lateral femoral condyle degeneration in a time-dependent manner, to which the high level of expression of MMP-7 and collagen type II could contribute.


Asunto(s)
Fémur/fisiología , Ligamento Cruzado Posterior/lesiones , Ligamento Cruzado Posterior/fisiología , Adulto , Animales , Cadáver , Humanos , Inestabilidad de la Articulación , Articulación de la Rodilla/patología , Ligamentos/patología , Masculino , Modelos Animales , Ligamento Cruzado Posterior/anatomía & histología , Conejos , Rango del Movimiento Articular , Rotura
15.
Angew Chem Int Ed Engl ; 55(48): 15012-15016, 2016 11 21.
Artículo en Inglés | MEDLINE | ID: mdl-27791304

RESUMEN

Lead halide perovskite quantum dots (QDs) are promising candidates for future lighting applications, due to their high quantum yield, narrow full width at half maximum (FWHM), and wide color gamut. However, the toxicity of lead represents a potential obstacle to their utilization. Although tin(II) has been used to replace lead in films and QDs, the high intrinsic defect density and oxidation vulnerability typically leads to unsatisfactory material properties. Bismuth, with much lower toxicity than lead, is promising to constitute lead-free perovskite materials because Bi3+ is isoelectronic to Pb2+ and more stable than Sn2+ . Herein we report, for the first time, the synthesis and optical characterization of MA3 Bi2 Br9 perovskite QDs with photoluminescence quantum yield (PLQY) up to 12 %, which is much higher than Sn-based perovskite nanocrystals. Furthermore, the photoluminescence (PL) peaks of MA3 Bi2 X9 QDs could be easily tuned from 360 to 540 nm through anion exchange.

16.
Biochem Biophys Res Commun ; 466(4): 615-21, 2015 Oct 30.
Artículo en Inglés | MEDLINE | ID: mdl-26392312

RESUMEN

Tenuigenin, a major active component of polygala tenuifolia root, has been used to treat patients with insomnia, dementia, and neurosis. In this study, we aimed to investigate the effects of tenuigenin on osteoclastogenesis and clarify the possible mechanism. We showed that tenuigenin inhibited receptor activator of nuclear factor-κB ligand (RANKL)-induced osteoclast differentiation and bone resorption without cytotoxicity, which was further demonstrated by reduced osteoclast specific gene expression such as TRAP, c-Src, ATP6v0d2, etc. Moreover, the inhibitory effect of tenuigenin was associated with impaired NF-κB activity owing to delayed degradation/regeneration of IkBa and inhibition of p65 nuclear translocation. Consistent with the in vitro results, micro-ct scanning and analysis data showed that tenuigenin suppressed RANKL-induced bone loss in an animal model. Taken together, our data demonstrate that tenuigenin inhibit osteoclast formation and bone resorption both in vitro and in vivo, and comprise a potential therapeutic alternative for osteoclast-related disorders such as osteoporosis and cancer-induced bone destruction.


Asunto(s)
Conservadores de la Densidad Ósea/farmacología , Medicamentos Herbarios Chinos/farmacología , FN-kappa B/metabolismo , Osteoclastos/efectos de los fármacos , Osteoclastos/metabolismo , Ligando RANK/antagonistas & inhibidores , Animales , Resorción Ósea/tratamiento farmacológico , Resorción Ósea/metabolismo , Resorción Ósea/patología , Diferenciación Celular/efectos de los fármacos , Supervivencia Celular/efectos de los fármacos , Células Cultivadas , Regulación hacia Abajo/efectos de los fármacos , Ratones , Ratones Endogámicos C57BL , Osteoclastos/citología
17.
Tumour Biol ; 36(10): 7891-5, 2015 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-25953260

RESUMEN

miRNA-22 (miR-22) has been showed to involve in a variety of cancers; however, the association between miR-22 expression level and the prognosis of osteosarcoma is also poorly unknown. Fifty-two patients with surgically resected paired osteosarcoma and non-neoplastic disease between 2008 and 2014 were involved in this study. Real-time PCR was performed to examine the expression level of miR-22 in osteosarcoma tissues and noncancerous bone tissues. Then the association between miR-22 expression and clinical-pathological parameters were further evaluated. Kaplan-Meier analysis and Cox proportional hazards regression models were explored to reveal the correlations of miR-22 expression with survival of patients. The results indicated that miR-22 was downregulated in osteosarcoma tissues in comparison with noncancerous bone tissues. In addition, there is statistically significance between miR-22 expression level and recurrence, metastasis, and chemotherapy response. The patients with lower miR-22 expression level had both poorer overall survival and disease-free survival. The multivariant analysis revealed that the miR-22 expression level and metastasis status are independent prognosis factors for osteosarcoma. In conclusion, miR-22 was downregulated in osteosarcoma and its expression level was correlated with a variety of important clinical-pathological parameters. Moreover, miR-22 may serve as a promising biomarker for predicting the prognosis of osteosarcoma.


Asunto(s)
Biomarcadores de Tumor/genética , Neoplasias Óseas/genética , Huesos/metabolismo , Regulación Neoplásica de la Expresión Génica , MicroARNs/genética , Recurrencia Local de Neoplasia/genética , Osteosarcoma/genética , Adulto , Neoplasias Óseas/mortalidad , Neoplasias Óseas/patología , Estudios de Casos y Controles , Femenino , Estudios de Seguimiento , Humanos , Metástasis Linfática , Masculino , Clasificación del Tumor , Recurrencia Local de Neoplasia/mortalidad , Recurrencia Local de Neoplasia/patología , Estadificación de Neoplasias , Osteosarcoma/mortalidad , Osteosarcoma/secundario , Pronóstico , ARN Mensajero/genética , Reacción en Cadena en Tiempo Real de la Polimerasa , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Tasa de Supervivencia
18.
Tumour Biol ; 36(2): 495-501, 2015 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-25618600

RESUMEN

Giant cell tumor is a relatively uncommon but painful tumor of bone, which can metastasize to the lungs. The RANK pathway is often reported to be involved in the pathogenesis of giant cell tumor of bone (GCTB). This pathway is a key signaling pathway of bone remodeling that plays a critical role in differentiation of precursors into multinucleated osteoclasts, and activation of osteoclasts leading to bone resorption. Dysregulation of RANK ligand (RANKL)-RANK-osteoprotegerin (OPG) signaling cascade induces the imbalance between bone formation and bone resorption, which leads to the changes in bone mass, increases osteoclast-mediated bone destruction, bone metastasis, and the progression of existing skeletal tumors. Recent evidences have shown that targeting the components of RANKL-RANK-OPG signaling pathway is a promising approach in the treatment of GCTB. This review study has focused on the association of RANKL-RANK-OPG pathway in the pathogenesis and progression of GCTB as well as discussed the possible therapeutic strategies by targeting this pathway.


Asunto(s)
Tumor Óseo de Células Gigantes/genética , Osteoprotegerina/genética , Ligando RANK/genética , Transducción de Señal , Resorción Ósea/genética , Diferenciación Celular/genética , Regulación Neoplásica de la Expresión Génica , Tumor Óseo de Células Gigantes/patología , Humanos , Neoplasias Pulmonares/genética , Neoplasias Pulmonares/patología , Neoplasias Pulmonares/secundario , Osteoclastos/metabolismo , Osteoclastos/patología , Osteogénesis/genética , Osteoprotegerina/metabolismo , Ligando RANK/biosíntesis
19.
Zhong Nan Da Xue Xue Bao Yi Xue Ban ; 39(3): 301-6, 2014 Mar.
Artículo en Zh | MEDLINE | ID: mdl-24748195

RESUMEN

OBJECTIVE: To analyze the epidemiological characteristics and treatment situation of pelvic fractures in 5 cities in Hunan, improve the treatment and provide epidemiological data for policymakers. METHODS: The clinical data of 65 patients with pelvic fractures were collected from 9 third-tier hospitals in Hunan from October 2012 to March 2013. The gender, age, cause, volume of blood transfusion, and prognosis were analyzed with SPSS 13.0. RESULTS: There were 44 male and 21 female patients (2.10:1.00). The age ranged from11 to 86 years and 74.6% of the patients were between 20 and 59. The main cause was traffic injury (30 cases, 46.2%) and fall injury (22 cases, 33.8%). About 73.8% patients suffered associated injuries all over the body. By Tile's classification of pelvic fractures, the average blood transfusion of type A was 483.33 mL, that of type B was 1 026.92 mL and type C was 1 905.56 mL. Compared with type A, the treatment outcome of type C patients was worse. CONCLUSION: Pelvic fractures are mostly caused in young and middle-aged males by high-energy. Tile C pelvic fractures need more blood transfusion and have poor prognosis. Patients had better be taken straight to municipal hospitals by expertise. Safety education for high-risk groups should be enhanced to reduce the incidence of pelvic fractures.


Asunto(s)
Fracturas Óseas/epidemiología , Huesos Pélvicos/patología , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Niño , China/epidemiología , Ciudades , Femenino , Humanos , Incidencia , Masculino , Persona de Mediana Edad , Centros de Atención Terciaria , Resultado del Tratamiento , Adulto Joven
20.
Innovation (Camb) ; 4(6): 100518, 2023 Nov 13.
Artículo en Inglés | MEDLINE | ID: mdl-37841885

RESUMEN

Carbon neutrality calls for renewable energies, and the efficient use of renewable energies requires energy storage mediums that enable the storage of excess energy and reuse after spatiotemporal reallocation. Compared with traditional energy storage technologies, mobile energy storage technologies have the merits of low cost and high energy conversion efficiency, can be flexibly located, and cover a large range from miniature to large systems and from high energy density to high power density, although most of them still face challenges or technical bottlenecks. In this review, we provide an overview of the opportunities and challenges of these emerging energy storage technologies (including rechargeable batteries, fuel cells, and electrochemical and dielectric capacitors). Innovative materials, strategies, and technologies are highlighted. Finally, the future directions are envisioned. We hope this review will advance the development of mobile energy storage technologies and boost carbon neutrality.

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