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Micro/nano-manipulation is the fabrication of particular constructs on devices at the micro/nano-scale. Precise manipulation of microparticles is one of the key technological difficulties in manufacturing micro/nano-scale components. Based on scanning electron microscopy and nanomanipulator, this paper adopts a direct push method to operate randomly distributed microparticles into ordered structures. A two-probe interaction strategy is proposed to enable microparticle movements in all directions efficiently and avoid scratching the substrate surface. To overcome the uncertainties in micromanipulation, a virtual nano-hand strategy was also implemented: long-range advance of each microparticle is realized by multiple single-step pushes, whose trajectory is theoretically analyzed. The pushes are well programmed to imitate effects of a more powerful and determined hand. Experimental results show that the theoretical single-step motion trajectory is in line with actual operation, and the proposed strategy can ensure precise operation of the microparticles in all directions and improve reliability and effectiveness of operation. [ABSTRACT FROM AUTHOR]

Residual intravenous foreign bodies following hand trauma are relatively rare; only a few previous reports of this situation are available. It has been reported that foreign bodies often migrate to the heart and atrium dextrum. Herein, we report a recent case of needle breakage in the dorsal vein of the hand that was removed with lignification using an intraoperative C-arm fluoroscopy machine and tape tourniquet to avoid proximal movement during removal. The mandate should be to remove within the capacity allowed so that rare cases and terrible complications can be avoided. The case was seen at The Yanji City, Jilin Province, China at the Yanbian University Hospital emergency at February 20, 2023.

Pediatric acute myeloid leukemia (AML) is a complex and heterogeneous disease. Several studies have shown the regulatory functions of microRNAs (miRNAs) in pediatric AML progression, and in this study, we aimed to evaluate the biological role of miR-206 in pediatric AML. The results demonstrated that miR-206 expression levels in the bone marrow and serum of pediatric AML patients were remarkably decreased than those in normal controls, and low serum miR-206 expression was closely associated with the unfavorable clinicopathological characteristics and prognosis of pediatric AML patients. In addition, in vitro functional experiments revealed that overexpression of miR-206 significantly inhibited AML cell proliferation partly through induction of cell cycle arrest. Further studies showed that Cyclin D1 might be a direct target of miR-206 in AML cells, and the impaired proliferation ability of miR-206-overexpressing AML cells was notably rescued by Cyclin D1 restoration. Accordingly, the findings of our study suggested that miR-206 might serve as a promising prognostic marker and a potential therapy target for patients with pediatric AML., (Copyright © 2019 Elsevier GmbH. All rights reserved.)

Pancreatic cancer (PCa) is one of the most fatal cancers worldwide. Recently, many studies have confirmed that long non-coding RNAs (lncRNAs) play crucial roles in the development of many human cancers, including PCa. The purpose of the present study was to investigate the biological role and underlying mechanisms of lncRNA small nucleolar RNA host gene 1 (SNHG1) in PCa progression. The results demonstrated that the expression levels of SNHG1 were increased in PCa cell lines and human tissue samples. High SNHG1 expression was notably correlated with adverse characteristics and poor survival of PCa patients. Knockdown of SNHG1 suppressed PCa cell proliferation in vitro and PCa tumor growth in vivo, and these effects might be associated with the induction of cell cycle arrest. We further confirmed that, in PCa cells, SNHG1 can negatively regulate miR-195 expression by acting as a ceRNA, and Cyclin D1 is a direct target of miR-195. Overexpression of miR-195 abrogated the oncogenic role of SNHG1 in PCa cells. Collectively, our results identified SNHG1 as a novel oncogenic lncRNA in PCa, and indicated that SNHG1/miR-195/Cyclin D1 axis might be a potential therapeutic target for PCa patients., Competing Interests: None., (IJCEP Copyright © 2019.)