Publications by authors named "Juan Pan"

Introduction: Carbapenem-resistant gram-negative bacteria (CR-GNB) pose a significant threat to public health and require immediate attention. The development of novel antibacterial agents against CR-GNB has become an urgent priority, and nanomaterials offer promising solutions due to their unique properties. This study introduces 5-amino-2-mercaptobenzimidazole (5-A-2MBI) functionalized gold nanoparticles (5-A-2MBI_Au NPs) and evaluates their antibacterial activity against CR-GNB.

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The Gegen-Danshen (GD) herb pair is extensively employed in the treatment of cardiovascular diseases, attributed to its wide spectrum of bioactive constituents. This study presented a comprehensive chemical analysis of GD using an advanced analytical platform, which integrated online two-dimensional liquid chromatography (LC × LC) coupled with diode array detector (DAD) and hybrid linear ion trap orbitrap mass spectrometry (LTQ-orbitrap). In this setup, a Hypersil GOLD CN column (150 mm × 2.

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As an active constituent in the extract of dried fruits of , Schisandrin B exhibits diverse pharmacological effects, including liver protection, anti-inflammatory and anti-oxidant. Numerous studies have demonstrated that Schisandrin B exhibits significant antitumor activity against various malignant tumors in preclinical studies, which is achieved by inhibiting cell proliferation and metastasis and promoting apoptosis. As a potential antitumor agent, Schisandrin B holds broad application prospects.

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Twenty constituents, three new terpenes named Paeoniterpene A-C (1-3), and three new fatty glycosides named Paeoniglycoside A-C (4-6) were isolated from the leaves of Paeonia lactiflora Pall. The structures of compounds 1-6 were identified using extensive spectroscopic methods, such as NMR, MS, CD, IR, and UV. Compounds 4-6 were characterized through quantum chemical calculations and DP4 probability analysis, and ECD definitively confirmed their structures.

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Ethnopharmacological Relevance: Rheumatoid Arthritis (RA), a chronic inflammatory autoimmune condition, presents a substantial challenge to public health. Dictamnus dasycarpus Turcz. (D.

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Two new compounds (-), together with six known ones (), were isolated from the roots of Pall. The structures of two new compounds were elucidated based on HR-ESI-MS, UV, and NMR spectroscopic data analysis. Moreover, the anti-inflammatory activities of compounds were determined using LPS-induced RAW 264.

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Objective: Mesalazine is a widely used medication for treating mild to moderate inflammatory bowel disease (IBD). First identified as a potential cause of acute pancreatitis (AP) in 1989, the link between mesalazine and AP has primarily been established through case reports and a limited number of retrospective studies. This study aims to explore the characteristics of mesalazine-induced AP.

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Nine previously undescribed chromones, named sadivamones O-W (1-9), and five known analogues (10-14), were isolated from the roots of Saposhnikovia divaricata (Turcz.) Schischk. The detailed structural analysis of each compound was finalized by a variety of methods including NMR (1D and 2D), mass spectrometry (HR-ESI-MS) spectroscopic data, and sugar hydrolysis.

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Two-dimensional liquid chromatography (2D-LC) separation systems, based on two independent columns with different separation mechanisms, have exhibited strong resolving power for complex samples. Therefore, in recent years, the exceptional resolution of 2D-LC has significantly advanced the chemical separation of natural products, such as complex herbs, greatly facilitating their qualitative and quantitative analysis. This paper aims to review the latest strategies of 2D-LC in the quantitative analysis of complex chemical compositions in natural products.

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Twenty-one compounds were isolated and identified from the ethanol extract of (Kom.) Nakai, including two new compounds ( and ), a new artificial product () and eighteen known compounds (). Compounds and were isolated from for the first time.

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Alzheimer's disease (AD) is a neurodegenerative disorder characterized by the deposition of beta-amyloid (Aβ) peptides. Microglia-mediated neuroinflammation is one of the primary contributors to the pathogenesis of AD. Withanolides, the main constituents in the leaves of Datura stramonium L.

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Introduction: Protein A immunoadsorption (IA) is proving to be an effective treatment method for autoimmune diseases and other disorders. Regional citrate anticoagulation (RCA) prevents clotting in extracorporeal circuits without increasing hemorrhage risk in high bleeding risk patients, but there are no specific guidelines for its application in IA. We aimed to evaluate the safety and adverse effects of RCA used in IA therapy.

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species are systemic, often seed-transmissible symbionts (endophytes) of cool-season grasses (Poaceae subfam. Poöideae) that produce up to four classes of bioprotective alkaloids. Whereas haploid species may reproduce sexually and transmit between host plants (horizontally), many species are polyploid hybrids that are exclusively transmitted via seeds (vertically).

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Background: The major depressive disorder (MDD) is a heterogeneous condition and characterized by a high recurrence rate, with neuroinflammation playing a significant role in its various potential pathologies. In recent years, neuronal pyroptosis induced by neuroinflammation has garnered increasing attention in depression research. Bupleurum scorzonerifolium Willd.

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Reactivation of endogenous retroviruses (ERVs) has been proposed to be involved in aging. However, the mechanism of reactivation and contribution to aging and age-associated diseases is largely unexplored. In this study, we identified a subclass of ERVs reactivated in senescent cells (termed senescence-associated ERVs (SA-ERVs)).

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Article Synopsis
  • Two new compounds and a new artificial product, along with fifteen known compounds, were isolated from (Kom.) Nakai.
  • Their structures were determined using spectroscopic techniques like mass spectrometry and NMR, and compared with existing literature for validation.
  • The cytotoxic activity of all compounds was tested against 4T1 and LN229 cancer cells, showing that certain compounds were more effective against LN229 cells compared to 4T1, with cisplatin used as a positive control.
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Background: Schisandra chinensis (Turcz.) Baill (S. chinensis), a member of the Magnoliaceae family, is renowned for its distinctive medicinal attributes and is commonly employed in the treatment of disorders affecting the CNS.

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Three undescribed isosteroidal alkaloids (1-3), along with two known ones (4, 5) were isolated from the bulbs of Fritillaria ussuriensis Maxim, their structures were established by comprehensive analyses of the 1D, 2D-NMR and HR-ESI-MS data. Meanwhile, LPS-activated RAW 264.7 macrophages were used to determine the potential anti-inflammatory activity of all the alkaloids in vitro.

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Article Synopsis
  • * Natural products have a wide range of biological activities but pose challenges in drug discovery, including complications in separation and low effectiveness.
  • * The paper discusses 127 synthetic analogs of natural products, classifying them by disease treatment efficacy and exploring their structure-activity relationships to guide future pharmaceutical development for neurodegenerative diseases.
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Objectives: Gefitinib (GEF) is a targeted medicine used to treat locally advanced or metastatic non-small cell lung cancer (NSCLC). However, GEF's hepatotoxicity limits its clinical use. This study aims to investigate the protective effect of naringin (NG) against GEF-induced hepatotoxicity.

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Article Synopsis
  • SBP-1, a purified neutral polysaccharide from Schisandra chinensis, shows promise in preventing and treating Parkinson's disease (PD) through both in vivo and in vitro studies.
  • The compound enhances behavioral function, protects dopaminergic neurons, and reduces cell death in PD mouse models by targeting the MCL-1 protein to promote autophagy.
  • Overall, findings suggest SBP-1 could be a viable candidate for future PD therapies due to its ability to modulate apoptotic responses and improve neuron health.
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Background: As synthesis technology advances, novel and efficient derivatives of tetracyclines are found. Three new antibiotics were approved within the past 18 years, and represent a new era in the use of tetracyclines. To gain further insight into adverse events linked to tetracyclines and better protect pediatric patients, ongoing monitoring of safety data is crucial.

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Background: Multiple myeloma is a malignant tumour of the blood in which abnormal proliferation of plasma cells leads to bone destruction, renal impairment, anaemia, and hypercalcaemia. Renal impairment caused by multiple myeloma is a common and serious condition; however, the prognosis of multiple myeloma at the time of diagnosis remains unclear.

Method: We conducted searches for literature in PubMed, Web of Science, Cochrane, Embase, CNKI, Wanfang, and VIP databases up to 30 April 2023.

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Three new compounds 1-glyceryl 9(), 10(), 11()-trihydroxy-12()-octadecenoate, 2'-20---hydroxyphenylpropionyloxy-20-hyd-roxyarachidic acid glycerol ester (), 3---l-arabinopyranosyl-(1→6)--d-glucopyranoside of ethyl (3)-hydroxybutanoate (), as well as a new natural product () were isolated from the fruits of L. The structures of 26 compounds were determined by comprehensive spectroscopic analyses, NMR calculation, chemical methods, and comparisons of spectroscopic data. Compounds and exhibited good anti-inflammatory activity in the LPS-induced RAW 264.

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