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Characterization of distinct microbiota associated with androgenetic alopecia patients treated and untreated with platelet-rich plasma(PRP)
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作者 Qian Zhang Yanan Wang +5 位作者 Cheng Ran Yingmei Zhou Zigang Zhao tianhua xu Hongwei Hou Yuan Lu 《Animal Models and Experimental Medicine》 CAS CSCD 2024年第2期106-113,共8页
Background:Androgenic alopecia(AGA)is the most common type of hair loss in men,and there are many studies on the treatment of hair loss by platelet-rich plasma(PRP).The human scalp contains a huge microbiome,but its r... Background:Androgenic alopecia(AGA)is the most common type of hair loss in men,and there are many studies on the treatment of hair loss by platelet-rich plasma(PRP).The human scalp contains a huge microbiome,but its role in the process of hair loss remains unclear,and the relationship between PRP and the microbiome needs further study.Therefore,the purpose of this study was to investigate the effect of PRP treatment on scalp microbiota composition.Methods:We performed PRP treatment on 14 patients with AGA,observed their clinical efficacy,and collected scalp swab samples before and after treatment.The scalp microflora of AGA patients before and after treatment was characterized by amplifying the V3-V4 region of the 16 s RNA gene and sequencing for bacterial identification.Results:The results showed that PRP was effective in the treatment of AGA patients,and the hair growth increased significantly.The results of relative abundance analysis of microbiota showed that after treatment,g_Cutibacterium increased and g_Staphylococcus decreased,which played a stable role in scalp microbiota.In addition,g_Lawsonella decreased,indicating that the scalp oil production decreased after treatment.Conclusions:The findings suggest that PRP may play a role in treating AGA through scalp microbiome rebalancing. 展开更多
关键词 androgenic alopecia MICROBIOME platelet-rich plasma SCALP
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Highly sensitive and stable probe refractometer based on configurable plasmonic resonance with nano-modified fiber core 被引量:1
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作者 Jianying Jing Kun Liu +3 位作者 Junfeng Jiang tianhua xu Shuang Wang Tiegen Liu 《Opto-Electronic Advances》 SCIE EI CAS CSCD 2023年第6期38-51,共14页
A dispersion model is developed to provide a generic tool for configuring plasmonic resonance spectral characteristics.The customized design of the resonance curve aiming at specific detection requirements can be achi... A dispersion model is developed to provide a generic tool for configuring plasmonic resonance spectral characteristics.The customized design of the resonance curve aiming at specific detection requirements can be achieved.According to the model,a probe-type nano-modified fiber optic configurable plasmonic resonance(NMF-CPR)sensor with tip hot spot enhancement is demonstrated for the measurement of the refractive index in the range of 1.3332-1.3432 corresponding to the low-concentration biomarker solution.The new-type sensing structure avoids excessive broadening and redshift of the resonance dip,which provides more possibilities for the surface modification of other functional nanomaterials.The tip hot spots in nanogaps between the Au layer and Au nanostars(AuNSs),the tip electric field enhancement of AuNSs,and the high carrier mobility of the WSe_(2)layer synergistically and significantly enhance the sensitivity of the sensor.Ex-perimental results show that the sensitivity and the figure of merit of the tip hot spot enhanced fiber NMF-CPR sensor can achieve up to 2995.70 nm/RIU and 25.04 RIU^(−1),respectively,which are 1.68 times and 1.29 times higher than those of the conventional fiber plasmonic resonance sensor.The results achieve good agreements with numerical simulations,demonstrate a better level compared to similar reported studies,and verify the correctness of the dispersion model.The detection resolution of the sensor reaches up to 2.00×10^(−5)RIU,which is obviously higher than that of the conventional side-polished fiber plasmonic resonance sensor.This indicates a high detection accuracy of the sensor.The dense Au layer effectively prevents the intermediate nanomaterials from shedding and chemical degradation,which enables the sensor with high stability.Furthermore,the terminal reflective sensing structure can be used as a practical probe and can allow a more convenient operation. 展开更多
关键词 fiber photonics sensor customized plasmonic resonance curve nano-modified fiber core tip hot spot effect high sensitivity and stability
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An Application of Canny Edge Detection Algorithm to Rail Thermal Image Fault Detection
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作者 Libo Cai Yu Ma +2 位作者 Tangming Yuan Haifeng Wang tianhua xu 《Journal of Computer and Communications》 2015年第11期19-24,共6页
The paper discusses an application for rail track thermal image fault detection. In order to get better results from the Canny edge detection algorithm, the image needs to be processed in advance. The histogram equali... The paper discusses an application for rail track thermal image fault detection. In order to get better results from the Canny edge detection algorithm, the image needs to be processed in advance. The histogram equalization method is proposed to enhance the contrast of the image. Since a thermal image contains multiple parallel rail tracks, an algorithm has been developed to locate and separate the tracks that we are interested in. This is accomplished by applying the least squares linear fitting technique to represent the surface of a track. The performance of the application is evaluated by using a number of images provided by a specialised company and the results are essentially favourable. 展开更多
关键词 FAULT DETECTION RAIL Thermal Image CANNY Edge DETECTION Linear Least SQUARES
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Achievable information rate optimization in C‑band optical fber communication system
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作者 Zheng Liu tianhua xu +3 位作者 Ji Qi Joshua Uduagbomen Jian Zhao Tiegen Liu 《Frontiers of Optoelectronics》 EI CSCD 2023年第2期123-128,共6页
Optical fber communication networks play an important role in the global telecommunication network.However,nonlinear efects in the optical fber and transceiver noise greatly limit the performance of fber communication... Optical fber communication networks play an important role in the global telecommunication network.However,nonlinear efects in the optical fber and transceiver noise greatly limit the performance of fber communication systems.In this paper,the product of mutual information(MI)and communication bandwidth is used as the metric of the achievable information rate(AIR).The MI loss caused by the transceiver is also considered in this work,and the bit-wise MI,generalized mutual information(GMI),is used to calculate the AIR.This loss is more signifcant in the use of higher-order modulation formats.The AIR analysis is carried out in the QPSK,16QAM,64QAM and 256QAM modulation formats for the communication systems with diferent communication bandwidths and transmission distances based on the enhanced Gaussian noise(EGN)model.The paper provides suggestions for the selection of the optimal modulation format in diferent transmission scenarios. 展开更多
关键词 Optical fber communication Achievable information rate Mutual information Generalized mutual information
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Obesity-related glomerulopathy: pathogenesis, pathologic, clinical characteristics and treatment 被引量:26
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作者 tianhua xu Zitong Sheng Li Yao 《Frontiers of Medicine》 SCIE CAS CSCD 2017年第3期340-348,共9页
n light of the rapid increase in the number of obesity incidences worldwide, obesity has become an independent risk factor for chronic kidney disease. Obesity-related giomerulopathy (ORG) is characterized by glomeru... n light of the rapid increase in the number of obesity incidences worldwide, obesity has become an independent risk factor for chronic kidney disease. Obesity-related giomerulopathy (ORG) is characterized by glomerulomegaly in the presence or absence of focal and segmental glomerulosclerosis lesions. IgM and complement 3 (C3) nonspeciflcally deposit in lesions without immune-complex-type deposits during ORG immunofluorescence. ORG-associated glomerulomegaly and focal and segmental glomerulosclerosis can superimpose on other renal pathologies. The mechanisms under ORG are complex, especially hemodynamic changes, inflammation, oxidative stress, apoptosis, and reduced functioning nephrons. These mechanisms synergize with obesity to induce end-stage renal disease. A slow increase of subnephrotic proteinuria ( 〈 3.5 g/d) is the most common clinical manifestation of ORG. Several treatment methods for ORG have been developed. Of these methods, renin-angiotensin-aldosterone system blockade and weight loss are proven effective. Targeting mitochondria may offer a novel strategy for ORG therapy. Nevertheless, more research is needed to further understand ORG. 展开更多
关键词 obesity-related glomerulopathy PATHOGENESIS PATHOLOGIC clinical characteristics
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Phase demodulation method based on a dual-identical-chirped-pulse and weak fiber Bragg gratings for quasi-distributed acoustic sensing 被引量:6
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作者 Guanhua Liang Junfeng Jiang +8 位作者 Kun Liu Shuang Wang tianhua xu Wenjie Chen Zhe Ma Zhenyang Ding xuezhi Zhang Yongning Zhang Tiegen Liu 《Photonics Research》 SCIE EI CSCD 2020年第7期1093-1099,共7页
A phase demodulation method for quasi-distributed acoustic sensing(DAS)systems based on a dual-identicalchirped-pulse and weak fiber Bragg gratings(WFBGs)is proposed.Compared to the use of Rayleigh backscattering ligh... A phase demodulation method for quasi-distributed acoustic sensing(DAS)systems based on a dual-identicalchirped-pulse and weak fiber Bragg gratings(WFBGs)is proposed.Compared to the use of Rayleigh backscattering light in optical fibers,the implementation of WFBGs can contribute to obtaining an optical signal with a higher signal-to-noise ratio(SNR).The dual-identical-chirped-pulse is generated by a time-delay fiber,and the sinusoidal carrier is generated by the interference between the two chirped pulses reflected by adjacent WFBGs.The phase of the sinusoidal carrier represents the dynamic strain change posed on the sensing fiber.Discrete Fourier transform is used to directly retrieve the phase information.The performance of the phase demodulation from interference signals under different sinusoidal carrier frequencies and SNRs is numerically investigated.The piezoelectric transducer is employed to emulate the sound in the experiment to verify the effectiveness of our method.It is shown that the dynamic strain can be well reconstructed at the end of a 101.64 km fiber when the signal SNR is down to 3.234 d B.Our proposed method enables the application of the long-distance sensing in quasi-DAS systems. 展开更多
关键词 fiber PULSE identical
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Low‐intensity pulsed ultrasound ameliorates angiotensin II-induced cardiac fibrosis by alleviating inflammation via a caveolin-1-dependent pathway 被引量:3
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作者 Kun ZHAO Jing ZHANG +11 位作者 tianhua xu Chuanxi YANG LiqingWENG TingtingWU XiaoguangWU Jiaming MIAO Xiasheng GUO Juan TU Dong ZHANG Bin ZHOU Wei SUN Xiangqing KONG 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2021年第10期818-838,共21页
Objective:Cardiac hypertrophy and fibrosis are major pathological manifestations observed in left ventricular remodeling induced by angiotensin II(AngII).Low-intensity pulsed ultrasound(LIPUS)has been reported to amel... Objective:Cardiac hypertrophy and fibrosis are major pathological manifestations observed in left ventricular remodeling induced by angiotensin II(AngII).Low-intensity pulsed ultrasound(LIPUS)has been reported to ameliorate cardiac dysfunction and myocardial fibrosis in myocardial infarction(MI)through mechano-transduction and its downstream pathways.In this study,we aimed to investigate whether LIPUS could exert a protective effect by ameliorating AngII-induced cardiac hypertrophy and fibrosis and if so,to further elucidate the underlying molecular mechanisms.Methods:We used AngII to mimic animal and cell culture models of cardiac hypertrophy and fibrosis.LIPUS irradiation was applied in vivo for 20 min every 2 d from one week before mini-pump implantation to four weeks after mini-pump implantation,and in vitro for 20 min on each of two occasions 6 h apart.Cardiac hypertrophy and fibrosis levels were then evaluated by echocardiographic,histopathological,and molecular biological methods.Results:Our results showed that LIPUS could ameliorate left ventricular remodeling in vivo and cardiac fibrosis in vitro by reducing AngII-induced release of inflammatory cytokines,but the protective effects on cardiac hypertrophy were limited in vitro.Given that LIPUS increased the expression of caveolin-1 in response to mechanical stimulation,we inhibited caveolin-1 activity with pyrazolopyrimidine 2(pp2)in vivo and in vitro.LIPUS-induced downregulation of inflammation was reversed and the anti-fibrotic effects of LIPUS were absent.Conclusions:These results indicated that LIPUS could ameliorate AngII-induced cardiac fibrosis by alleviating inflammation via a caveolin-1-dependent pathway,providing new insights for the development of novel therapeutic apparatus in clinical practice. 展开更多
关键词 Low-intensity pulsed ultrasound(LIPUS) CAVEOLIN-1 Cardiac fibrosis INFLAMMATION Angiotensin II(AngII)
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Performance improvement approaches for optical fiber SPR sensors and their sensing applications 被引量:4
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作者 JIANYING JING KUN LIU +6 位作者 JUNFENG JIANG tianhua xu SHUANG WANG JINYING MA ZHAO ZHANG WENLIN ZHANG TIEGEN LIU 《Photonics Research》 SCIE EI CAS CSCD 2022年第1期126-147,共22页
Optical fiber surface plasmon resonance(SPR) sensors point toward promising application potential in the fields of biomarker detection,food allergen screening,and environmental monitoring due to their unique advantage... Optical fiber surface plasmon resonance(SPR) sensors point toward promising application potential in the fields of biomarker detection,food allergen screening,and environmental monitoring due to their unique advantages.This review outlines approaches in improving the fiber SPR sensing performance,e.g.,sensitivity,detection accuracy,reliability,cross-sensitivity,selectivity,convenience and efficiency,and corresponding sensing applications.The sensing principles of SPR sensors,especially the performance indicators and their influencing factors,have been introduced.Current technologies for improving the fiber SPR performance and their application scenarios are then reviewed from the aspects of fiber substrate,intrinsic layer(metal layer),and surface nanomaterial modification.Reasonable design of the substrate can strengthen the evanescent electromagnetic field and realize the multi-parameter sensing,and can introduce the in situ sensing self-compensation,which allows corrections for errors induced by temperature fluctuation,non-specific binding,and external disturbances.The change of the intrinsic layer can adjust the column number,the penetration depth,and the propagation distance of surface plasmon polaritons.This can thereby promote the capability of sensors to detect the large-size analytes and can reduce the full width at half-maximum of SPR curves.The modification of various-dimensionality nanomaterials on the sensor surfaces can heighten the overlap integral of the electromagnetic field intensity in the analyte region and can strengthen interactions between plasmons and excitons as well as interactions between analyte molecules and metal surfaces.Moreover,future directions of fiber SPR sensors are prospected based on the important and challenging problems in the development of fiber SPR sensors. 展开更多
关键词 FIBER thereby CORRECTION
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Self-copy-shift-based differential phase extracting method for fiber distributed acoustic sensing 被引量:1
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作者 Wenjie Chen Junfeng Jiang +6 位作者 Kun Liu Shuang Wang Zhe Ma Guanhua Liang Zhenyang Ding tianhua xu Tiegen Liu 《Chinese Optics Letters》 SCIE EI CAS CSCD 2020年第8期49-53,共5页
A differential phase extracting method based on self-copy-shift for distributed acoustic sensing is proposed.Heterodyne and optical hybrids are used to realize high signal-to-noise ratio in-phase and quadrature-phase(... A differential phase extracting method based on self-copy-shift for distributed acoustic sensing is proposed.Heterodyne and optical hybrids are used to realize high signal-to-noise ratio in-phase and quadrature-phase(IQ)signal measurement.The measured signals are self-copied and shifted for certain data points,and then they are digitally mixed with the original signals to construct the differential phase.The four produced signals are then combined to carry out IQ demodulation.An experiment with strain having an amplitude modulation waveform is carried out.The results showed that waveform information can be recovered well,and the signal-tonoise ratio achieves 32.8 dB. 展开更多
关键词 optical fiber sensing phase extraction coherent OTDR distributed sensing
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Erratum to: Low-intensity pulsed ultrasound ameliorates angiotensin II-induced cardiac fibrosis by alleviating inflammation via a caveolin-1-dependent pathway
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作者 Kun ZHAO Jing ZHANG +11 位作者 tianhua xu Chuanxi YANG Liqing WENG Tingting WU Xiaoguang WU Jiaming MIAO Xiasheng GUO Juan TU Dong ZHANG Bin ZHOU Wei SUN Xiangqing KONG 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS 2024年第9期800-800,共1页
The original version of this article(Zhao et al.,2021)unfortunately contained two mistakes.(1)In p.826,the hematoxylin eosin(HE)staining figure of the fourth panel(the Ang Ⅱ+LIPUS group)in Fig.3a was incorrect.
关键词 inflammation al. cardiac
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