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10 results on '"Shen, W S"'

1. Exact solution for high harmonic generation and the response to an ac driving field for a charge density wave insulator

Author

Shen, W. S., Devereaux, T. P., and Freericks, J. K.

Subjects
Condensed Matter - Strongly Correlated Electrons, Physics - Optics
Abstract

We develop and exactly solve a model for electrons driven by pulsed or continuous ac fields. The theory includes both the photoexcitation process as well as the subsequent acceleration of the electrons. In the case of an ac response, we examine both the nonequilibrium density of states and the current. In the case of pulsed light for high harmonic generation, we find the radiated light assumes a nearly universal behavior, with only limited dependence on the parameters of the system, except for the amplitude of the driving field, which determines the range of high harmonics generated and a tendency toward a narrowing of the peaks in a charge density wave versus a metal. This type of high harmonic generation can potentially be used for the creation of solid-state-based ultrafast light sources., Comment: (11 pages, 11 figures, ReVTeX)

Published
2013
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8. Potential mechanisms of microRNA-141-3p to alleviate chronic inflammatory pain by downregulation of downstream target gene HMGB1: in vitroand in vivostudies

Author

Shen, W-S, Xu, X-Q, Zhai, N-N, Zhou, Z-S, Shao, J, and Yu, Y-H

Abstract

The present study aimed to investigate the potential role of microRNA-141-3p (miR-141-3p) in chronic inflammatory pain (CIP) by targeting the high-mobility group box1 (HMGB1) gene. In the in vitrostudy, BV2 microglial cells were selected and assigned into blank, lipopolysaccharide (LPS), miR-141-3p mimics, mimics control, miR-141-3p inhibitor, inhibitor control, miR-141-3p mimics+LPS, mimics control+ LPS, miR-141-3p inhibitor+LPS and inhibitor control+LPS groups. Ninety-six rats were randomly divided into 8 groups (12 rats in each group): blank control, model control, negative control (NC), miR-141-3p mimics+ complete Freund’s adjuvant (CFA), mimics control+CFA, HMGB1 short hairpin RNA (shRNA)+CFA, HMGB1 NC+CFA and miR-141-3p mimics+HMGB1 shRNA+CFA groups. The quantitative real-time PCR, western blotting, enzyme-linked immunosorbent assay and pain behavioral test were used to measure the miR-141-3p and HMGB1 mRNA expressions, HMGB1 protein expression, inflammatory cytokines levels, and thermal and mechanical pain thresholds, respectively. Compared with the blank, mimics control, inhibitor control and miR-141-3p mimics+LPS groups, the miR-141-3p mimics group had increased miR-141-3p expression and interleukin (IL)-10 levels, and had decreased mRNA and protein expressions of HMGB1 and the levels of IL-1β, tumor necrosis factor-α (TNF-α) and IL-6, whereas the opposite trend were found in the LPS, miR-141-3p inhibitor, mimics control+LPS and inhibitor control+LPS groups. Compared with the LPS, miR-141-3p inhibitor, mimics control+LPS and inhibitor control+LPS groups, the miR141-3p+LPS group had an obviously decreased expression of miR-141-3p and IL-10, increased mRNA and protein expressions of HMGB1 and the levels of IL-1β, TNF-α and IL-6. Compared with the rats in the blank control group, the miR-141-3p expression, IL-10 level, and thermal and mechanical pain thresholds decreased significantly, whereas the mRNA and protein expressions of HMGB1, IL-1β, TNF-α and IL-6 increased significantly in rats in the NC, mimics control+CFA and HMGB1 NC+ CFA groups. The miR-141-3p expression was increased in rats in the miR-141-3p mimics+HMGB1 shRNA+CFA group. Our study demonstrated that miR-141-3p can alleviate the CIP by downregulating the downstream target gene HMGB1.

Published
2017
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