Publications by authors named "Xiaoping Ren"

White adipocytes serve as primary energy reservoirs and their malfunction is linked to different metabolic disorders, yet the mechanisms underlying cellular specialization, a critical step during adipogenesis remain unknown. Here, we reveal the indispensable role of cutaneous T-cell lymphoma-associated antigen 5 (cTAGE5) in adipocyte differentiation and maturation. Conditional deletion of cTAGE5 in adipocyte precursor cells (APCs), rather than mature adipocytes, results in progressive loss of white adipose tissue and death of mice.

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Background: Osseous structures have been recognized as an endocrine organ that bidirectionally interacts with the brain. Osteoporosis (OP) is a systemic endocrine disorder linked to neurodegenerative disorders. This bone-brain axis interdependence highlights the necessity of cognitive monitoring in OP management to detect early neurodegeneration markers, particularly given individual variability in brain reserve that may predispose patients to accelerated cognitive decline.

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Background: Airway mucus hypersecretion is a key pathophysiological feature in many respiratory diseases and could lead to airway obstruction and repeated infections, consequently accelerating disease progression, which impacts on pulmonary function and quality of life (QoL), highlighting the importance of mucolytic therapy targeting airway mucus hypersecretion.

Objectives: To investigate the safety and efficacy of inhalable ambroxol hydrochloride aerosol for adult patients with respiratory diseases.

Design: An open-label, single-arm, multicentre postmarketing surveillance study.

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The continuous outbreak of various viruses reminds us to prepare broad-spectrum antiviral drugs. Human dihydroorotate dehydrogenase (hDHODH) inhibitor exhibits broad-spectrum antiviral effects. In order to explore the novel type of human dihydroorotate dehydrogenase inhibitor (hDHODHi), we have optimized, designed, and synthesized 17 compounds and conducted biological activity evaluation, molecular docking, and molecular dynamics studies.

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Objectives: To assess the effectiveness of HTS in lowering elevated ICP in TBI patients with TBI.

Material And Methods: A systematic search was conducted using 4 electronic databases (PubMed, Embase, Scopus, and Cochrane Library) to select relevant articles published in peer-reviewed journals. The risk ratio (RR) and mean difference (MD) were calculated, along with their 95% confidence intervals (95% CIs).

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Article Synopsis
  • The research challenges the belief that complete spinal cord transection leads to irreversible loss of motor function and sensation, demonstrating significant recovery in animal models using polyethylene glycol (PEG) applied directly to the injury site.
  • Two Macaca fascicularis monkeys underwent complete dorsal cord transection and were studied for motor recovery, with one receiving PEG treatment showing near-complete recovery at 18 months, while the control without PEG remained paralyzed.
  • Findings indicate that PEG can facilitate neural repair and functional recovery in primates, suggesting potential for future applications in human spinal cord injury treatment.
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Article Synopsis
  • Intracerebral haemorrhage (ICH) triggers a strong inflammatory response that contributes to further brain damage, with extracellular vesicles (EVs) playing a critical role in communication between cells through immune-regulatory proteins.
  • Researchers identified dysregulated proteins in EVs, focusing on Serum amyloid A 1 (SAA1), to understand its impact on neuroinflammation after ICH.
  • Their study found that SAA1 levels increased in ICH patients, and neutralizing it improved brain function and reduced inflammation in an ICH mouse model, suggesting SAA1 could be a target for future therapies.
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Aims: Spinal cord injuries (SCI) pose persistent challenges in clinical practice due to the secondary injury. Drawing from our experience in spinal cord fusion (SCF), we propose vascularized allogeneic spinal cord transplantation (vASCT) as a novel approach for SCI, much like organ transplantation has revolutionized organ failure treatment and vascularized composite-tissue allotransplantation has addressed limb defects.

Materials And Methods: In this study, 24 dogs were paired and underwent vASCT, with donor spinal cord grafts and polyethylene glycol (PEG) application for SCF.

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Background: Spinal cord injury (SCI) is a severe impairment of the central nervous system, leading to motor, sensory, and autonomic dysfunction. The present study investigates the efficacy of the polyethylene glycol (PEG)-mediated spinal cord fusion (SCF) techniques, demonstrating efficacious in various animal models with complete spinal cord transection at the T10 level. This research focuses on a comparative analysis of three SCF treatment models in beagles: spinal cord transection (SCT), vascular pedicle hemisected spinal cord transplantation (vSCT), and vascularized allograft spinal cord transplantation (vASCT) surgical model.

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Spinal cord injury (SCI) is a severely disabling and catastrophic condition that poses significant global clinical challenges. The difficulty of SCI repair results from the distinctive pathophysiological mechanisms, which are characterised by limited regenerative capacity and inadequate neuroplasticity of the spinal cord. Additionally, the formation of cystic cavities and astrocytic scars after SCI further obstructs both the ascending and descending neural conduction pathways.

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The material undergoes high temperature and high strain rate deformation process during the cutting process, which may induce the dynamic recrystallization behavior and result in the evolution of dynamic mechanical properties of the material to be machined. In this paper, the modified Johnson-Cook (J-C) model for nickel-based powder metallurgy superalloy considering dynamic recrystallization behavior in high strain rate and temperature is proposed. The dynamic mechanical properties of the material under different strain rates and temperature conditions are obtained by quasi-static compression test and split Hopkinson pressure bar (SHPB) test.

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The pneumonia outbreak caused by Severe Acute Respiratory Syndrome 2 (SARS-CoV-2) infection poses a serious threat to people worldwide. Although vaccines have been developed, antiviral drugs are still needed to combat SARS-CoV-2 infection due to the high mutability of the virus. SARS-CoV-2 main protein (M ) is a special cysteine protease that is a key enzyme for SARS-CoV-2 replication.

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Human dihydroorotate dehydrogenase (hDHODH) is a key enzyme that catalyzes the de novo synthesis of pyrimidine. In recent years, various studies have shown that inhibiting this enzyme can treat autoimmune diseases such as rheumatoid arthritis (RA) and cancer. This study designed and synthesized a series of novel thiazolidone hDHODH inhibitors.

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Objective: To explore method and clinical effect of microsurgical thinned anterolateral thigh perforator flap to repair soft tissue defects of foot and ankle.

Methods: From March 2017 to January 2022, totally 20 patients with soft tissue defects of ankle joint were treated with micro-thinning anterolateral perforator flap for free transplantation, included 13 males and 7 females, aged from 22 to 58 years old with an average of (36.45±12.

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Our paper investigates the association of renewable energy, financial development, urbanization, and growth in China along with technology. The newly developed econometric techniques (asymmetries) have been applied to explore short and long-run nonlinear relation among variables by utilizing annual data for the period of 1965-2021. In nonlinear cointegration, findings highlight the importance of renewable energy consumption for growth and development.

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Originating from slow irreversible and progressive loss and dysfunction of neurons and synapses in the nervous system, neurodegenerative diseases (NDDs) affect millions of people worldwide. Common NDDs include Parkinson's disease, Alzheimer's disease multiple sclerosis, Huntington's disease, and amyotrophic lateral sclerosis. Currently, no sensitive biomarkers are available to monitor the progression and treatment response of NDDs or to predict their prognosis.

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Introduction: Coating-thickness-dependent physical properties can induce different cutting temperatures with physical vapor deposition (PVD) titanium aluminum nitride (TiAlN) ceramic-coated tools. The determination of the optimal TiAlN coating thickness is important to obtain superior coating physical properties and decrease the cutting temperature of Inconel 718 alloy.

Objectives: The present study investigates the effects of coating thickness on the physical properties of TiAlN coatings and the cutting temperature during the machining of Inconel 718 alloy.

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Aims: Our team tested spinal cord fusion (SCF) using the neuroprotective agent polyethylene glycol (PEG) in different animal (mice, rats, and beagles) models with complete spinal cord transection. To further explore the application of SCF for the treatment of paraplegic patients, we developed a new clinical procedure for SCF called vascular pedicle hemisected spinal cord transplantation (vSCT) and tested this procedure in eight paraplegic participants.

Methods: Eight paraplegic participants (American Spinal Injury Association, ASIA: A) were enrolled and treated with vSCT (PEG was applied to the sites of spinal cord transplantation).

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Background: lncRNAs have been indicated to involve in cell invasion, proliferation, and metastasis. However, function of DARS-AS1 in osteosarcoma remains poorly explored.

Methods: DARS-AS1 and miR-532-3p level were measured using qRT-PCR.

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Background: Stroke is a common clinical brain disease, and swallowing dysfunction is one of the most common complications in stroke patients. Despite multiple treatments for swallowing dysfunction, it often leads to a series of complications. Interventions such as systematic voice training and swallowing function exercises have emerged in recent years, but their effectiveness remains unclear.

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Article Synopsis
  • The study presents a new surgical method called sural nerve transplantation (SNT) designed to improve conditions for paraplegic patients suffering from spinal cord injuries (SCI) between T1 and T12.
  • In a clinical trial involving 12 patients, results showed improvements in autonomic nerve functions and relief from central pain in several participants, along with some recovery of sensory and motor functions.
  • While SNT did not fully restore spinal cord continuity, it successfully established some nerve connections and improved certain functions in most patients, suggesting its potential as a treatment option for SCI.
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Introduction: Glial scar formation impedes nerve regeneration/reinnervation after spinal cord injury (SCI); therefore, removal of scar tissue is essential for SCI treatment.

Aims: To investigate whether removing a spinal cord and transplanting a vascularized pedicle of hemisected spinal cord from the spinal cord caudal to the transection can restore motor function, to aid in the treatment of future clinical spinal cord injuries. We developed a canine model.

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Non‑small cell lung cancer (NSCLC), a leading cause of cancer‑associated mortality, has resulted in low survival rates and a high mortality worldwide. Accumulating evidence has suggested that microRNAs (miRs) play critical roles in the regulation of cancer progression and the present study aimed to explore the underlying mechanism of miR‑205 in NSCLC. Reverse transcription‑quantitative PCR was performed, which determined that miR‑205 expression was upregulated in NSCLC, and the present study detected the upregulation of miR‑205‑3p in a number of NSCLC cell lines and NSCLC tissues.

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Machined surface integrity characteristics, including surface stresses, physical-mechanical properties and metallographic structures, play important roles in the fatigue performance of machined components. This work aimed at investigating the effects of machined surface integrity on high-temperature low-cycle fatigue life. The process parameters were optimized to obtain required surface integrity and fatigue life of the turning superalloy Inconel 718.

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