Publications by authors named "Guowei Cai"

Importance: Sciatica is commonly caused by herniated lumbar disc and contributes to severe pain and prolonged disability. Although acupuncture is widely used by patients with chronic sciatica, the evidence of its efficacy is scarce.

Objective: To investigate the efficacy and safety of acupuncture compared with sham acupuncture in patients with chronic sciatica from herniated disk.

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Background: Chemotherapy is an important treatment for children with cancer, and chemotherapy-induced pain is an important role in affecting patients' quality of life. In our study, bibliometric analysis was used to identify current research hotspots and future research trends of chemotherapy and pain in children over the last decade. Our findings can provide a reference for the research in the field of chemotherapy and pain in children.

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Subplenones A-J (-), 10 new xanthone dimers, have been isolated and characterized from the endophytic fungus sp. CPCC 401465, which resides within the Chinese medicinal plant . The isolation process was guided by antibacterial assays and molecular-networking-based analyses.

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There are six new phthalide derivatives Verbalide A ~ F (1-6) together with another known derivative (7) isolated from the endophytic fungus Preussia sp. CPCC 400972. Their structures were established by comprehensive spectroscopic analyses, including NMR and HRESIMS.

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Article Synopsis
  • Oxalicine B is a complex compound with a unique structure called a bispirocyclic ring, but its biosynthesis was not well understood until this study, which focuses on key enzymes involved in its production.
  • The researchers identified and characterized three important oxygenases (OxaL, OxaK, and OxaB) that play crucial roles in the biosynthetic pathway, with OxaK showing versatility in processing various intermediates.
  • They also discovered new metabolites with strong anti-influenza A virus activity and provided insights into the late-stage biosynthesis of oxalicine B, suggesting potential for further enzyme-based modifications.
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Background: Genomic analysis indicated that the genomes of ascomycetes might carry dozens of biosynthetic gene clusters (BGCs), yet many clusters have remained enigmatic. The ascomycete genus Epicoccum, belonging to the family Didymellaceae, is ubiquitous that colonizes different types of substrates and is associated with phyllosphere or decaying vegetation. Species of this genus are prolific producers of bioactive substances.

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The ideal wind turbine power curve provided by the manufacturer cannot monitor the practical performance of wind turbines accurately in the engineering stage; in this paper, a modified approach of the wind turbine power curve is proposed based on improved Bins and K-means++ clustering. By analyzing the wind speed-power data collected by the supervisory control and data acquisition system (SCADA), the relationship between wind speed and output is compared and elaborated on. On the basis of data preprocessing, an improved Bins method for equal frequency division of data is proposed, and the results are clustered through K-means++.

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Genome mining revealed that the genomes of basidiomycetes may include a considerable number of biosynthetic gene clusters (BGCs), yet numerous clusters remain unidentified. Herein, we report a combination of genome mining with an OSMAC (one strain, many compounds) approach to characterize the spectrum of melleolides produced by CPCC 401429. Using F1 fermentation medium, the metabolic pathway of the gene cluster was successfully upregulated.

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Twenty-two metabolites were isolated from sp. CPCC 401423 cultured on rice. The structures of all compounds were elucidated mainly by MS and NMR analysis as well as the necessary CD experimental evidence, of which penicillidione A (), penicillidione B (), ()-4-[(4-acetoxy-3-methyl-2-butenyl)oxy]phenylacetic acid (), ()-2-hydroxy-2-{4-[(3-methyl-2-butenyl)oxy]phenyl} (), ()-4-(2,3-dihydroxy-3-methyl-butoxy)phenylacetic acid (), ()-4-[(3-carboxy-2-butenyl)oxy]benzoic acid (), ()-4-[(4-hydroxy-3-methyl-2-butenyl)oxy]benzoic acid (), open-cycled N-demethylmelearoride A (), and penostatin M () were identified as new compounds.

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Postgenomic analysis manifested that filamentous fungi contain numerous natural product biosynthetic gene clusters in their genome, yet most clusters remain cryptic or down-regulated. Herein, we report the successful manipulation of strain sp. CPCC 400735 that enables its genetic engineering via targeted overexpression of pathway-specific transcriptional regulator AspE.

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Article Synopsis
  • Chronic Sciatica is a painful condition with significant impacts on health and quality of life, and current treatments are ineffective long-term, prompting this study on acupuncture's potential benefits.
  • The study involves 216 patients, randomly assigned to receive either real or sham acupuncture, with treatment over 4 weeks and follow-ups extending to 52 weeks to evaluate pain and disability outcomes.
  • The trial is ethically approved, will gather informed consent from participants, and aims to publish its findings in peer-reviewed journals to share results with the medical community.
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Objective: To observe the effect of warm needling on the expression of oxidative stress related factors and pro-inflammatory factors in cartilage of mono sodium iodoacetate (MIA) induced knee osteoarthritis (KOA) model rats, so as to explore its mechanisms underlying improvement of KOA.

Methods: Sixty male Sprague Dawley rats were randomly divided into 5 groups: control, model, acupuncture, moxibustion,warm needling, with 12 rats in each group. Rats of the acupuncture, moxibustion,warm needling groups received manual acupuncture or moxibustion or both stimulation of "Zusanli" (ST36) for 15 minutes, once a day for 21 days beginning from the third day after modeling.

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Chemical investigation of coastal saline soil-derived fungus Aspergillus flavipes RD-13 led to the isolation of two new seco-cytochalasins (1) and (2) along with nine known analogs. Their structures were elucidated by comprehensive spectral analysis, and the absolute configurations of these two new ones were determined through Rh(OCOCF)-induced CD experiment and chemical interconversions. Moreover, the absolute configuration of a known compound named cytochalasins Z (3) was also determined for the first time.

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Objective: We aim to explore whether acupuncture inhibits inflammation and bone destruction in rat model monosodium iodoacetate (MIA)-induced knee osteoarthritis (KOA) by 18F-fluorodeoxyglucose (18F-FDG) small-animal positron emission tomography (PET) and micro-computed tomography (CT) imaging.

Methods: KOA was induced in rats by intra-articular injection MIA (2 mg/50 μL) through the right knee of the rats. Forty male Sprague Dawley rats weighing 280 to 340 g (12 weeks old) were randomly divided into four groups including Control group, KOA group, KOA plus manual acupuncture group (KOA+MA), KOA plus sham acupuncture group (KOA+SA).

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The purpose of this study was to explore the current status and trends of acupuncture for depression in the last decade and provide new insights for researchers in future studies. The articles regarding acupuncture treatment for depression published between 2011 and 2020 were extracted from the Web of Science Core Collection. We used CiteSpace to analyze data on publications, countries, institutions, cited journals, cited authors, cited references, keywords, and citation bursts about acupuncture and depression.

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Background: Knee osteoarthritis (KOA) is a common disabling condition and a heavy financial burden to the society. Platelet-rich plasma (PRP) is considered to be an effective method in the repair and regeneration of cartilage and alleviate pain in KOA. But the utilising of PRP to treat KOA in clinical has shown variable results from many studies.

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Background: Acupuncture is widely used for pain diseases while evidence of its efficacy for sciatica is insufficient. We aim to explore the feasibility and efficacy of acupuncture with different acupoint selecting strategies for sciatica induced by lumbar disc herniation.

Methods: This is a multicenter, three-arm, patient-assessor-blinded randomized controlled pilot trial.

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Two new cyclopentenone derivatives, daldispones A (1) and B (2) were isolated from the fungus Daldinia sp. CPCC 400770. Their structures and absolute configurations were elucidated by extensive spectroscopic analyses and calculated electronic circular dichroism (ECD).

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Acupuncture is an emerging alternative therapy that has been beneficial for the pain of osteoarthritis (OA). However, the underlying mechanism of protective effect remains unclear. MCP1/CCR2 axis can be stimulated in various periods of OA, and we hypothesize that acupuncture may treat OA by regulating the MCP1/CCR2 axis.

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The impact of progestins (i.e. synthetic forms of progesterone) on aquatic organisms has drawn increasing attention due to their widespread occurrence in the aquatic environments and potential effects on the endocrine system of fish.

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Three-phase PWM rectifiers are adopted extensively in industry because of their excellent properties and potential advantages. However, while the IGBT has an open-circuit fault, the system does not crash suddenly, the performance will be reduced for instance voltages fluctuation and current harmonics. A fault diagnosis method based on deep feedforward network with transient synthetic features is proposed to reduce the dependence on the fault mathematical models in this paper, which mainly uses the transient phase current to train the deep feedforward network classifier.

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The present study was designed to elucidate the beneficial effects of XJEK on myocardial infarction (MI) in rats, especially through the amelioration of endothelial dysfunction (ED). 136 Sprague-Dawley rats were randomized into 13 groups: control group for 0wk ( = 8); sham groups for 2, 4, and 6 weeks (wk); MI groups for 2, 4, and 6 wk; MI+XJEK groups for 2, 4, and 6w k; MI+Fosinopril groups for 2, 4, and 6 wk ( = 8~10). In addition, 8 rats were treated for Evans blue staining and Tetrazolium chloride (TTC) staining to determine the infarct size.

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Background: Xin-Ji-Er-Kang (XJEK) is a Chinese herbal formula, which has been reported to exert effective protection against cardiovascular diseases, including hypertension and myocarditis.

Methods: Cultured human umbilical vascular endothelial cells (HUVECs) were treated with angiotensin II (Ang II) and different concentrations of aqueous layer extracts (AqE). Subsequently nitric oxide (NO) and endothelial nitric oxide synthase (eNOS) expression levels were detected.

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The aim of the present study was to investigate the effects of Xin-Ji-Er-Kang (XJEK) on high salt-induced hypertensive mice. Mice with high-salt diet-induced hypertension were divided into four groups: Control (standard diet alone for 8 weeks), model (diet containing 8% NaCl for 8 weeks and intragastric administration of distilled water for the last 4 weeks), XJEK + high-salt-treated (diet containing 8% NaCl for 8 weeks and intragastric administration of XJEK for the last 4 weeks) and irbesartan + high-salt-treated (diet containing 8% NaCl for 8 weeks with intragastric administration of irbesartan for the last 4 weeks). The hemodynamic index and cardiac pathological changes in the hypertensive mice were then examined.

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