Publications by authors named "Wenjuan Guan"

The efficient recovery of nickel from chloride systems has long presented a challenge in the field. While solvent extraction is a viable approach, conventional extractants have been associated with drawbacks such as a high requirement for chloride ions and substantial consumption of acids and alkalis. In response to these challenges, this investigation developed and synthesized a novel thiazole-based extractant, N, N-Bis(4-thiazolylmethyl)octylamine (NNBT), tailored for the selective extraction of nickel from chloride systems.

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The recovery of valuable metals from spent lithium-ion batteries (LIBs) is crucial for environmental protection and resource optimization. In the traditional recovery process of spent LIBs, the leaching of high-valence metals has the problems of high cost and limited reagent utilization, and some valuable metals are lost in the subsequent purification process of the leaching solution. To reduce the cost of reagents, this study proposes the use of low-cost SO as a reagent combined with pressure leaching to efficiently recover high-valence metals from delithiated materials of spent LIBs, while selective solvent extraction is used to remove trace impurities in the leaching solution to avoid the loss of valuable metals.

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Article Synopsis
  • This study examined the clinical features of patients with dermatomyositis (DM) who have anti-MDA5 antibodies and suffered from macrophage activation syndrome (MAS).
  • It compared the characteristics of 11 MAS patients to 33 similar patients without MAS, revealing that MAS patients showed more severe symptoms, including higher infection rates and specific skin manifestations.
  • The study found a high mortality rate (36.4%) among MAS patients, particularly in older individuals who received extensive treatments, and those with rapid progressive interstitial lung disease, infections, heart failure, and kidney issues.
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Objective: Dermatomyositis (DM) positive with anti-melanoma differentiation-associated gene 5 (anti-MDA5-DM) is a systemic autoimmune disease with high mortality. This study aimed to explore the risk factors of death in anti-MDA5-DM and validate a prediction model for all-cause mortality in anti-MDA5-DM.

Method: We conducted a retrospective study using a single-centre cohort of patients with newly onset anti-MDA5-DM from June 1, 2018 to August 31, 2021.

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Objectives: To explore the risk factors of early death in dermatomyositis patients positive with anti-melanoma differentiation-related gene 5 antibody (anti-MDA5-DM). To explore the optimal treatment regimen for patients with anti-MDA5-DM.

Methods: Patients with newly onset anti-MDA5-DM from June 2018 to October 2021 in our centre were retrospectively reviewed for 6 months.

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Objectives: To investigate the correlation of Behçet's disease (BD) with myelodysplastic syndrome (MDS) and identify the predictive risk factors in Chinese patients.

Methods: A retrospective study of BD associated with MDS (BD-MDS) patients from the First Affiliated Hospital of Zhengzhou University was conducted.

Results: Among 15 BD-MDS patients, 10 were females and 5 males.

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Objectives: Mortality of dermatomyositis patients positive with anti-melanoma differentiation-related gene 5 antibody (anti-MDA5-DM) is alarming, especially during the first several months. Infection is an important cause of early death. As there are no reports regarding the effect of prophylactic use of compounded sulfamethoxazole (coSMZ; each tablet contains 400 mg of sulfamethoxazole and 80 mg of trimethoprim) in anti-MDA5-DM patients, we conducted this study to evaluate the efficacy of coSMZ in reducing the incidence of Pneumocystis jirovecii pneumonia (PJP).

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Tungsten residue waste (TRW), considered an environmental burden due to high content and excessive leaching toxicity of arsenic (As), are also secondary tungsten (W) resources. A novel method for simultaneous extraction of arsenic and tungsten from TRW via alkaline pressure oxidative leaching was proposed. The results show that As in the TRW mainly exists in the form of As coprecipitated with Mn(Ⅱ) oxides and FeAsS.

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Background: The coexistence of neuromyelitis optica spectrum disorder (NMOSD) and connective tissue disease (CTD) is well recognized. The purpose of this study was to investigate and compare the characteristics of first attack NMOSD with and without CTD.

Methods: A total of 113 Patients with NMOSD were included and were divided into two groups based on the presence of co-occurring CTD.

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Objectives: We aimed to identify different subtypes of dermatomyositis (DM) patients positive with anti-melanoma differentiation-associated gene 5 antibody (DM-MDA5+) for customised treatments to improve the outcomes.

Methods: Among 96 DM-MDA5+ patients, subgroups with similar phenotypes were delineated using hierarchical clustering analysis of the clinico-biological characteristics. Classification and regression trees were used to build a classification model and survival analysis was used to evaluate the prognoses of subgroups.

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Increasing evidences indicate that circular RNAs (circRNAs) play important roles in regulating gene expressions in various diseases. However, the role of circRNAs in inflammatory response of gouty arthritis remains unknown. This study aims to investigate the role and underlying mechanism of circHIPK3 in inflammatory response of gouty arthritis.

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An efficient method for constructing 2-acyl-3-aminoindoles from methyl ketones and 2-aminobenzonitriles is described, in which NaHS·nH2O is used as a novel umpolung reagent for the first time in organic synthesis. Mechanistic studies revealed that the key step involved an Eschenmoser sulfide contraction reaction.

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Objective: To review the evidence for benefits and harms of folate (folic acid or folinic acid) supplementation on methotrexate (MTX) treatment for rheumatoid arthritis (RA), to assess whether or not folate supplementation would reduce MTX toxicity or reduce MTX benefits, and to decide whether a higher MTX dosage is essential.

Methods: We performed a sensitive search strategy and searched systematically the Medline, Embase, Web of Science and Cochrane Library databases from inception to 2 June 2016. Abstracts from major rheumatology meetings and major trial registers were also searched to retrieve all randomized controlled trials that interested us.

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Relapsing polychondritis (RP) rarely affected the central nervous system (CNS). If the CNS is involved, it can result in psychiatric manifestations. Patients with RP always respond well to glucocorticoids and immunosuppressants.

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Eighty-eight ischemic stroke patients with massive cerebral infarction (MCI) who met our selection criteria were included in this study. MCI was assessed using the Glasgow Coma Scale (GCS) at hospital admission and at 2 weeks. The sera of all patients and controls were sampled at 48 h after the patients' attacks, and the sera of patients with MCI who had no severe cardiopulmonary complications, including those with hemorrhagic transformation (HT), were sampled again at 2 weeks.

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Objective: To investigate the effect of p65 gene inhibited by siRNA on neuronic differentiation in the marrow mesenchymal stem cells (MSCs).

Methods: The MSCs were transfected with Rn-p65-siRNA. Fasudil hydrochloride induced MSCs differentiating into neurons.

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Background: Few studies have examined the relationship between mircroRNAs and moyamoya disease (MMD). We performed a study of the significance of let-7c expression in the serum of MMD patients.

Methods: The experimental group includes 49 MMD patients, and the control group consists of 30 normal people, 20 cerebral hemorrhage patients, 20 massive cerebral infarction patients, 20 nonmassive cerebral infarction patients, and 20 neurological autoimmune disease patients.

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Anti-N-methyl-d-aspartate (NMDA) receptor encephalitis is a new category of autoimmune encephalitis associated with anti-NMDA receptor antibodies. The disease was first described in 2007, and it predominantly affects young women with or without ovarian teratomas. Most patients typically present with seizures, a decreased consciousness level, dyskinesia, autonomic dysfunction, and psychiatric symptoms.

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The study aimed to investigate the expression and significance of the plasma let-7 family in anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis. Blood samples from 5 anti-NMDAR encephalitis patients and 5 negative controls were collected for microarray analysis. Blood samples from10 anti-NMDAR encephalitis patients, 10 anti-NMDAR encephalitis patients whose physical conditions have improved after 3 months of immunotherapy, 20 virus (meningitis) encephalitis patients, 20 tuberculosis (meningitis) encephalitis patients, 10 purulent (meningitis) encephalitis patients, 20 cerebral cysticercosis patients, 20 ischemic stroke patients, 20 intracerebral hemorrhage patients, 15 neuromyelitis optica patients, 15 multiple sclerosis patients, 15 moyamoya disease patients, and 20 negative controls were collected for real-time quantitative PCR (qRT-PCR) analysis.

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Methylmalonic acidemia (MMA) is an autosomal-recessive inborn metabolic disorder that results from a deficiency in methylmalonyl-coenzyme A mutase or its cofactor, adenosylcobalamin. Currently, neurological manifestations in MMA are thought to be associated with neural apoptosis. BCL2L11, which is a proapoptotic Bcl-2 family member, is resident in the outer mitochondrial membrane, where this protein acts as a central regulator of the intrinsic apoptotic cascade and mediates excitotoxic apoptosis.

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Methylmalonic acidemia (MMA) is a metabolic disorder, which is caused by a deficiency of the mitochondrial enzyme methylmalonyl-CoA mutase. MMA diagnosis is dependent on the method of gas chromatography-mass spectrometry, which is expensive, complicated, and time consuming. Currently, microRNAs (miRNAs) have gained considerable interest for its function as a novel class of non-invasive and sensitive biomarkers for the diagnosis of diseases.

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Autosomal recessive cerebellar ataxias are a group of neurodegenerative disorders that are characterized by complex clinical and genetic heterogeneity. Although more than 20 disease-causing genes have been identified, many patients are still currently without a molecular diagnosis. In a two-generation autosomal recessive cerebellar ataxia family, we mapped a linkage to a minimal candidate region on chromosome 16p13.

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Background: Gluten sensitivity (GS) is a spectrum of disorders with diverse manifestations. Recent evidence suggests that ataxia may be the only manifestation of GS and that it may be one of the causes of sporadic ataxia.

Aim: To investigate the prevalence of gluten ataxia among patients with ataxia in China.

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Our previous study identified a new form of spinocerebellar ataxia (SCA), in which mutations in the gene coding for transglutaminase 6 (TG6) were suggested to be causative. However, the data concerning cellular distribution of TG6 in the brain is still fragmentary. Therefore, we now report a comprehensive immunohistochemical examination of the expression profile of TG6 in adult mouse brain.

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A common feature of polyglutamine (polyQ) diseases is the presence of aggregates in neuronal cells caused by expanded polyglutamine tracts. PolyQ proteins are the substrates of transglutaminase 2, and the increased activity of transglutaminase in polyQ diseases suggests that transglutaminase may be directly involved in the formation of the aggregates. We previously identified the transglutaminase 6 gene to be causative of spinocerebellar ataxia type 35 (SCA35), and we found that SCA35-associated mutants exhibited reduced transglutaminase activity.

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