Publications by authors named "Yu Ai-Ping"

Background: Incomplete immune recovery in people living with HIV/AIDS (PLWHA) remains an important clinical challenge with the lack of an effective strategy currently available to restore their T-cell immune response. This study aimed to evaluate the effect of Albuvirtide (ABT) on immune recovery in immunological non-responders (INRs) and attempted to explore potential mechanisms of ABT on the functionality of immune cells.

Methods: In this prospective, open-label, controlled clinical study, participants with incomplete immune reconstitution (continuous ART over 5 years and CD4T lymphocyte absolute count of <500 cells/µl or ART for 2-5 years and CD4T cell count of <200 cells/µl with undetectable viral load) were received intensive treatment with ABT or maintained on the original ART regimen at a ratio of 1:1.

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Purpose: The prespinal route of contralateral cervical 7 nerve transfer developed by Prof. Wendong Xu helps realize the direct anastomosis of the bilateral cervical 7 nerves. However, 20% of operations still require a nerve graft, which leads to an unfavorable prognosis.

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Objective: To evaluate the effectiveness of preoperative shaving and postoperative shampooing on the infection rate in neurosurgery.

Design: Meta-analysis.

Data Source: We conducted a search of the Embase, CINAHL, Scopus and PubMed databases up until February 1, 2022.

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Background: Contralateral seventh cervical nerve transfer (contralateral C7 transfer) is a novel treatment for patients with spastic paralysis, including stroke and traumatic brain injury. However, little is known on changes in plasticity that occur in the intact hemisphere after C7 transfer. An appropriate surgical model is required.

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Objective: Spastic arm paralysis after central neurological injury has a long-term effect on the patient's quality of life. Effective neurosurgical treatment for this dysfunction has been described in our previous studies. It is of great significance to determine a set of unified and concise clinical standards for motor function grading in the neurosurgical treatment and management.

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Article Synopsis
  • The study aimed to evaluate the use of CUBE-SITR MRI and high-frequency ultrasound for imaging the brachial plexus, specifically to identify issues like neoplastic brachial plexopathy and to measure the C7 nerve's anterior and posterior divisions before surgery.
  • Involving 50 patients with central nervous system and brachial plexus injuries, the study found a strong correlation between the lengths of the C7 nerve divisions measured via MRI and those measured during surgery.
  • The findings suggest that CUBE-STIR MRI effectively images the brachial plexus and provides accurate measurements, while ultrasound offers a simpler method to assess the C7 nerve's condition for surgical planning.
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Contralateral C7 nerve root transfer surgery has been successfully applied to rescue motor function of a hemiplegic upper extremity in patients with central neurological injury. This surgical technique is challenging, and limited anatomical space makes it difficult to manipulate tissues and may lead to higher complication rates. The authors hypothesis a new surgical route in which cervical nerve roots of both donor and recipient sides are exposed from a posterior intradural approach and neurorrhaphy is performed easily and clearly.

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Background/aims: This study aims to predict the pro-angiogenic functions of monocytic-type myeloid-derived suppressor cells (M-MDSCs) derived from mice infected with Echinococcus granulosus.

Methods: M-MDSCs were collected from Balb/c mice infected with E. granulosus and normal mice (control) and cultured in vitro.

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Electrical stimulation could enhance nerve regeneration and functional recovery. The objective of this study was to evaluate the regenerative effects of implanted electrodes with different contacts in resected sciatic nerve. Sciatic nerve resection and microsurgical repair models were established and randomly divided into four groups (point contact, 1/4 circle contact; whole-circle contact; no electrodes as control).

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OBJECTIVEContralateral C7 (CC7) nerve root has been used as a donor nerve for targeted neurotization in the treatment of total brachial plexus palsy (TBPP). The authors aimed to study the contribution of C7 to the innervation of specific upper-limb muscles and to explore the utility of C7 nerve root as a recipient nerve in the management of TBPP.METHODSThis was a 2-part investigation.

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Objective: To preliminarily study the pro-angiogenic activity of hydatid cysts against human umbilical vein endothelial cells and the transcriptional level of potential pro-angiogenic factors.

Methods: The hydatid cysts and protoscolex derived from experimentally infected mice were collected and cultured , then the human umbilical vein endothelial cells were stimulated by the supernatant and cyst fluid respectively, and the angiogenesis was observed and analyzed through a microscope and the angiogenesis mode of the software NIH Image J. Meanwhile, the mouse homologous proteins of matrix metalloproteinase-9 (MMP-9) and high mobility group box B1 (HMGB1) were identified in genome through sequence alignment, and their transcriptional levels in the cyst wall and protoscolex were analyzed.

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We introduce a more flexible optogenetics-based mapping system attached on a stereo microscope, which offers automatic light stimulation to individual regions of interest in the cortex that expresses light-activated channelrhodopsin-2 . Combining simultaneous recording of electromyography from specific forelimb muscles, we demonstrate that this system offers much better efficiency and precision in mapping distinct domains for controlling limb muscles in the mouse motor cortex. Furthermore, the compact and modular design of the system also yields a simple and flexible implementation to different commercial stereo microscopes, and thus could be widely used among laboratories.

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Objective: To investigate the effect and mechanism of Factor Xa on the differentiation of Meg-01 cells into platelet-like particles.

Methods: The Meg-01 cells were used as experimental object, Factor Xa was used as agonist. Cell proliferation was detected by CCK-8 assay.

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Objectives: After development and differentiation, megakaryocytes (MKs) can produce platelets. As is well known, thrombopoietin (TPO) can induce MKs to differentiate. The effect of thrombin on MKs differentiation is not clear.

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Purpose: The purpose of this study was to observe the treatment response of anti-neutrophil cytoplasmic antibody (ANCA)-associated pulmonary interstitial fibrosis in 8 patients before and after glucocorticoid or immunosuppressive therapy.

Methods: The clinical features and computed tomography imaging findings of the 8 patients in our hospital from October 2011 to October 2013, were retrospectively analyzed.

Findings: Mean age of the 8 patients was 72.

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Natural hirudin extracted from the secretion of medical leech salivary gland is a single-chain peptide containing 65 aminoacid residues with molecular weight of 7000 D, and exists in three isomers of HV1, HV2 and HV3. Hirudin possesses three disulfide bridges forming the structure of core cyclic peptides, which binds to the catalytic site of thrombin so as to inhibit the catalysis of thrombin. Its c-terminus rich in acidic aminoacid residues possesses hydrophilicity, and is free on the molecular surface, and can bind with fibrin recognition site of hirudin.

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To combine the fibrinolytic with anticoagulant activities for therapy of thrombotic deseases, a fusion protein made of tissue-type plasminogen activator (t-PA) and hirudin was constructed and expressed in chia pastoris. To improve thrombolytic properties of t-PA and reduce bleeding side effect of hirudin, FXa-recognition sequence was introduced between t-PA and hirudin molecules.The anticoagulant activity of hirudin can be target-released through cleavage of FXa at thrombus site.

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