Xi Tao Yan

ORCID: 0000-0001-8439-9087
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About
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Research Areas
  • Natural product bioactivities and synthesis
  • Phytochemistry and Biological Activities
  • Natural Compound Pharmacology Studies
  • Lung Cancer Treatments and Mutations
  • Bioactive natural compounds
  • Crystallization and Solubility Studies
  • Phytochemicals and Antioxidant Activities
  • Neurological Disease Mechanisms and Treatments
  • Sesquiterpenes and Asteraceae Studies
  • X-ray Diffraction in Crystallography
  • Essential Oils and Antimicrobial Activity
  • Genomics, phytochemicals, and oxidative stress
  • Eicosanoids and Hypertension Pharmacology
  • Cancer Treatment and Pharmacology
  • NF-κB Signaling Pathways
  • Phytochemical Studies and Bioactivities
  • HER2/EGFR in Cancer Research
  • Synthesis of Organic Compounds
  • Biological Activity of Diterpenoids and Biflavonoids
  • Lung Cancer Research Studies
  • Biological and pharmacological studies of plants
  • Plant chemical constituents analysis
  • Free Radicals and Antioxidants
  • Cancer-related molecular mechanisms research
  • Phase Equilibria and Thermodynamics

Chengdu University of Traditional Chinese Medicine
2025

Northwest A&F University
2015-2024

Xiamen University
2024

Sichuan University
2003-2024

West China Hospital of Sichuan University
2018-2022

Xiangya Hospital Central South University
2021

Central South University
2021

Zhengzhou University
2020

Korea University
2016-2018

Henan Cancer Hospital
2017

Abstract The search for lead compounds with anti-neuroinflammatory activity from structurally ‘optimized’ natural products is a crucial and promising strategy in the quest to discover safe efficacious agents treating neurodegenerative diseases. A phytochemical investigation on aerial portions of Hypericum elatoides led isolation five nitrogenous polycyclic polyprenylated acylphloroglucinols (PPAPs), hyperelanitriles A–D ( 1 – 4 ) hyperelamine 5 ). Their structures were determined by...

10.1038/s42004-023-01091-1 article EN cc-by Communications Chemistry 2024-01-02

Zanthoxylum schinifolium is an aromatic shrub, and its pericarp leaves are widely used in culinary applications East Asian countries. It has also long been traditional Oriental medicine for treating the common cold, stomach ache, diarrhea, jaundice. In this study, we identified two new compounds, zanthoxyloside (1) schinifolisatin A (13), along with 23 known coumarins (2-12) lignans (14-25), from a methanol extract of stems Z. . The chemical structures compounds were determined by mass, 1D-,...

10.1021/jf403479c article EN Journal of Agricultural and Food Chemistry 2013-10-21

Hericium erinaceus is a culinary-medicinal mushroom used traditionally in Eastern Asia to improve memory. In this work, we investigated the neuroprotective and neuritogenic effects of secondary metabolites isolated from MeOH extract cultured mycelium H. primary mechanisms involved. One new dihydropyridine compound (6) one natural product (2) together with five known compounds (1,3-5,7) were obtained their structures elucidated by spectroscopic analysis, including 2D NMR HRMS. The cell-based...

10.3390/ijms18081659 article EN International Journal of Molecular Sciences 2017-07-30

Artemisia iwayomogi has been used as a folk medicine for treating various diseases including inflammatory and immune-related diseases. Scopoletin (1) scopolin (2) were isolated from this species. showed more potent peroxyl radical-scavenging capacity, reducing cellular antioxidant capacity compared to (2). The inhibitory effect of 1 on the receptor activator nuclear factor κB ligand-induced osteoclastic differentiation RAW 264.7 macrophage cells was also than that 2. production general...

10.1021/np300824h article EN Journal of Natural Products 2013-03-19

HIV is still an incurable disease, causing many problems in the daily lives of patients and affecting their overall quality life. Previous studies have shown that advanced AIDS more serious physical, psychological, social, economic than unmet needs at this time. The main objective study to better understand late-stage develop targeted palliative care services for them. Descriptive phenomenological methods were used. Advanced selected using purposive sampling a tertiary infectious disease...

10.1186/s12904-025-01675-9 article EN cc-by-nc-nd BMC Palliative Care 2025-02-13

Four new δ- and γ-lactone derivatives, hyperelatolides A-D (1-4, respectively), were discovered from the aerial portions of Hypericum elatoides R. Keller. Their structures elucidated by analysis NMR spectra, HRESIMS, quantum chemical calculations ECD X-ray crystallographic data. Hyperelatolides A (1) B (2) represent first examples δ-lactone derivatives characterized a (Z)-(5,5-dimethyl-2-(2-oxopropyl)cyclohexylidene)methyl moiety benzoyloxy group attached to β- γ-positions core,...

10.1021/acs.jnatprod.3c00226 article EN Journal of Natural Products 2023-08-02

The anti-tumor activity and acceptable tolerability of pyrotinib plus chemotherapy have been demonstrated in phase III trials human epidermal growth factor receptor 2-positive metastatic breast cancer (BC). In this study, we assessed the efficacy safety neoadjuvant trastuzumab albumin-bound paclitaxel women with early or locally advanced BC.In single-arm exploratory II trial, patients untreated BC (stage IIA-IIIC) received 400 mg once daily, 4 mg/kg loading dose, followed by 2 a week, 125...

10.21037/gs-21-911 article EN Gland Surgery 2022-01-01

Pulsatilla koreana, a species endemic to Korea, is an important herb used in traditional medicine treat amoebic dysentery and malaria. In the present study, 23 oleanane-type triterpenoid saponins 1-23 eight lupane-type 24-31 were isolated from roots of P. koreana. Their structures elucidated on basis spectroscopic data. The methanol extract compounds next assessed for nematicidal activity against root-knot nematode (Meloidogyne incognita). showed strong after 48 h, with LC₅₀ value 92.8...

10.3390/molecules18055306 article EN cc-by Molecules 2013-05-08

Continuous efforts to identify sEH inhibitors using activity-guided fractionation have revealed 12 known compounds, 2-13, from Rheum undulatum. Compounds 2-13 and 1, which was obtained the in-house library, were tested for inhibitory activity against sEH. 1-9, 11, shown activity, with IC50 values ranging 2.5 ± 0.5 53.2 4.4 μM. They subjected enzyme kinetic studies explore binding mode between ligand receptor. Based on our results, compounds 2, 5-9, 11 (mixed type) 3 (noncompetitive had a...

10.1080/14756366.2016.1189421 article EN Journal of Enzyme Inhibition and Medicinal Chemistry 2016-08-23

Nine new sesquiterpenes, hyperhubeins A–I (1–9), and 14 known analogues (10–23) were isolated from the aerial portions of Hypericum hubeiense. Their structures absolute configurations determined unambiguously via spectroscopic analysis, single-crystal X-ray diffraction, electronic circular dichroism calculations. Compounds 1–3 possess an unprecedented sesquiterpene carbon skeleton. Further, a plausible biosynthetic pathway farnesyl diphosphate (FPP) is proposed. The phytochemicals evaluated...

10.1021/acs.jnatprod.2c00810 article EN Journal of Natural Products 2022-12-29

Background: Pyrotinib, a novel irreversible EGFR/HER2 dual tyrosine kinase inhibitor, shows encouraging anticancer activity and acceptable tolerability in multiple phase II III randomized clinical trials, but the real-world data of pyrotinib, especially outcomes HER2-positive metastatic breast cancer, have been rarely reported. Here, we evaluated treatment pyrotinib practice patients with cancer (MBC). Methods: This was prospective, real-world, observational cohort study. Through Breast...

10.3389/fphar.2023.1100556 article EN cc-by Frontiers in Pharmacology 2023-03-21

We sought to investigate attitudes toward breast-conserving therapy (BCS) in early-stage breast cancer (EBC) patients from P. R. China and assess the factors influencing their decision.There exists geographical difference decision perform mastectomy or BCS for EBC patients. To date, there has been no report on surgical choice mainland China.A structured questionnaire was delivered 1800 The elicited information about general patients' characteristics, BCS, roles of doctors spouses, levels...

10.1002/pon.1922 article EN Psycho-Oncology 2011-02-14

Zanthoxylum schinifolium is an aromatic shrub, the pericarp and leaves of which are widely used in culinary applications East Asian countries. In present study, one new neolignan glycoside, zanthoxyloside A (1) together with 16 known glycosides (2–12) alkaloids (13–17), were isolated from methanol extract stems Z. schinifolium. The absolute configuration monoterpenoid glycoside (2) was determined. structures compounds established by dimensional (1D), 2D NMR mass spectrometry. nuclear...

10.1248/cpb.c13-00759 article EN Chemical and Pharmaceutical Bulletin 2014-01-01
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