Parviflorene F (1), a novel sesquiterpenoid dimer isolated from Curcuma parviflora Wall, is a cytotoxic compound. In this study, we examined the mechanism of its cytotoxic effect in HeLa cells. Treatment with 1 enhanced the mRNA and protein expression of TRAIL-R2 (tumor necrosis factor alpha-related apoptosis inducing ligand receptor 2). Apoptosis was induced by 1 as revealed by the distribution of DNA and Annexin V/PI staining using flow cytometry. In addition, 1-induced apoptosis was inhibited by human recombinant TRAIL-R2/Fc chimera protein, TRAIL-neutralizing fusion protein. Also, we found that 1 induced the activation of caspase-8, caspase-9, and caspase-3, indicating that the cytotoxic effect of 1 is correlated with apoptosis by a caspase-dependent mechanism through TRAIL-R2. In addition, 1 enhanced TRAIL-induced cell death against HeLa and TRAIL-resistant DLD1 cells. Taken together, up-regulation of TRAIL-R2 by 1 may contribute to sensitization of TRAIL-induced cell death.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.bmc.2007.11.022 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Isolation and spectroscopic characterization of anticancer phytochemicals from : a combined experimental and theoretical investigation using ADMET analysis and in silico molecular docking simulation against key cancer targets.
Nat Prod Res
January 2025
Department of Chemistry, Islamic University of Science and Technology, Awantipora, JK, India.
, a high-altitude medicinal herb, possesses diverse therapeutic properties. This study conducted a comprehensive phytochemical analysis of the whole plant, leading to the isolation of 15 secondary metabolites (1-15) across various classes: flavonoids (), triterpenoids (, ), sesquiterpenoid lactones (, ) and furanocoumarins (, ) along with three steroids (). These compounds were characterized using NMR (HNMR,C NMR, 2D NMR), IR, HRMS and UV-VIS.
View Article and Find Full Text PDFLycopodiaceae herb from Vietnam as a promising medicinal source of natural hupezine and novel huperzine-producing endophytic fungi.
Biotechnol Lett
January 2025
Institute of Biotechnology, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay, Hanoi, 100000, Vietnam.
Objectives: (1) To evaluate the potential of producing huperzine (Hup) and anticholinesterase (AChE) activities of nine native Lycopodiaceae species collected in Vietnam; (2) Isolation, identification and characterization of a novel fungus producing both HupA and HupB isolated from Lycopodium casuarinoides Spring.
Results: All methanolic extracts of nine plants showed AChE inhibition from 8.55 to 71.
The First Large Identification of 3ANX and NX Producing Isolates of in Manitoba, Western Canada.
Toxins (Basel)
January 2025
Manitoba Agriculture, 65-3rd Avenue NE, Carman, MB R1N 1Y7, Canada.
Fusarium head blight, caused by , continues to be one of the most important and devastating fungal diseases on cereal grains including wheat, barley, and oat crops. produces toxic secondary metabolites that include trichothecene type A and type B mycotoxins. There are many variants of these toxins that are produced, and in the early 2010s, a novel type A trichothecene mycotoxin known as 3ANX (7-α hydroxy,15-deacetylcalonectrin) and its deacetylated product NX (7-α hydroxy, 3,15-dideacetylcalonectrin) were identified in Minnesota, USA.
View Article and Find Full Text PDFAnthoteibinenes F-Q: New Sesquiterpenes from the Irish Deep-Sea Coral .
Mar Drugs
January 2025
Department of Chemistry, University of South Florida, 4202 E. Fowler Avenue, CHE205, Tampa, FL 33620, USA.
New technology has opened opportunities for research and exploration of deep-water ecosystems, highlighting deep-sea coral reefs as a rich source of novel bioactive natural products. During our ongoing investigation of the chemodiversity of the Irish deep sea and the soft coral we report 12 unreported cadinene-like functionalized sesquiterpenes, anthoteibinenes F-Q. The metabolites were isolated using both bioassay- and H NMR-guided approaches.
View Article and Find Full Text PDFDetection of low frequency artemisinin resistance mutations, C469Y, P553L and A675V, and fixed antifolate resistance mutations in asymptomatic primary school children in Kenya.
BMC Infect Dis
January 2025
Centre for Geographic Medicine Research (Coast), Kenya Medical Research Institute-Wellcome Trust Research Programme, Kilifi, Kenya.
Background: To understand the emergence and spread of drug-resistant parasites in malaria-endemic areas, accurate assessment and monitoring of antimalarial drug resistance markers is critical. Recent advances in next-generation sequencing (NGS) technologies have enabled the tracking of drug-resistant malaria parasites.
Methods: In this study, we used Targeted Amplicon Deep Sequencing (TADS) to characterise the genetic diversity of the Pfk13, Pfdhfr, Pfdhps, and Pfmdr1 genes among primary school-going children in 15 counties in Kenya (Bungoma, Busia, Homa Bay, Migori, Kakamega, Kilifi, Kirinyaga, Kisii, Kisumu, Kwale, Siaya, Tana River, Turkana, Vihiga and West Pokot).
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!