In the preliminary screening, falcarinol and falcarindiol, C polyacetylenes from the roots of Glehnia littoralis F. Schmidt ex Miq (Umbelliferae), displayed cytotoxic activity both against oxaliplatin-sensitive/resistant colorectal cancer (CRC) and gefitinib-sensitive/resistant non-small cell lung cancer (NSCLC) cells. In this study, 13 polyacetylenes including a new (3R,11R)-11-hyroxy-isofalcarinolone (1) were isolated from G. littoralis, and the chemical structures were elucidated through NMR, HRMS, and optical rotation analysis as well as DP4 plus calculation. (3S,8S)-Oplopandiol (5) showed cytotoxic activities against oxaliplatin-sensitive and -resistant CRC (HCT116 and HCT116-OxR) cells. Unexpectedly, (3R,8S)-falcarindiol (3) and (3S)-falcarinol (12), newly purified from G. littoralis, did not show cytotoxic activity. It was confirmed that both falcarinol and falcarindiol, previously evaluated, were decomposed, which seems to be the cause of inconsistent biological results. These findings indicated that C polyacetylene could be a good starting compound for the development of anticancer leads against drug-resistant CRC and NSCLC cells, however, the stability of C polyacetylens should be considered for further studies.
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http://dx.doi.org/10.1007/s11418-024-01870-7 | DOI Listing |
Front Pharmacol
December 2024
Department of Radiology, Tianjin Key Laboratory of Functional Imaging and Tianjin Institute of Radiology, Tianjin Medical University General Hospital, Tianjin, China.
Introduction: Although photodynamic therapy (PDT) shows considerable potential for cancer treatment due to its precise spatial control and reduced toxicity, effectively eliminating residual cells under hypoxic conditions remains challenging because of the resistance conferred by these cells.
Methods: Herein, we synthesize an amphiphilic PEGylated polyphosphoester and present a nanocarrier (NP) specifically designed for the codelivery of hydrophobic photosensitizer (chlorin e6, Ce6) and hypoxia-activated prodrugs (tirapazamine, TPZ). We investigate the antitumor effect of NP on both cellular and animal level.
Front Microbiol
December 2024
Department of Medical Microbiology and Immunology, Medical School, University of Pecs, Pecs, Hungary.
Introduction: The COVID-19 pandemic has become a global health crisis, eliciting varying severity in infected individuals. This study aimed to explore the immune profiles between moderate and severe COVID-19 patients experiencing a cytokine storm and their association with mortality. This study highlights the role of PD-1/PD-L1 and the TIGIT/CD226/CD155/CD112 pathways in COVID-19 patients.
View Article and Find Full Text PDFCytotechnology
February 2025
Department of Microbiology, Dr. Ikram-Ul-Haq Institute of Industrial Biotechnology (IIIB), Government College University, Lahore, 54000 Pakistan.
Homeostasis of tissues requires a complex balance between cell proliferation and cell death. The disruption of this balance leads to tumors. Cancer is a mortal disease that spreads all over the body, it is an irregular cell growth.
View Article and Find Full Text PDFExplor Target Antitumor Ther
December 2024
Center for Natural Products Discovery (CNPD), School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Liverpool L3 3AF, UK.
Despite the fact that life expectancies are increasing and the burden of infectious diseases is decreasing, global cancer incidence rates are on the rise. Cancer outcome metrics are dismal for low- and middle-income countries (LMICs), including sub-Saharan Africa, where adequate resources and infrastructure for cancer care and control are lacking. Nigeria, the most populous country in Africa, exemplifies the miserable situation.
View Article and Find Full Text PDFFront Endocrinol (Lausanne)
January 2025
Department of Psychology, University of Miami, Coral Gables, FL, United States.
The neuropeptide oxytocin (OXT) and its receptor (OXTR) have been shown to play an important role in glucose metabolism, and pancreatic islets express this ligand and receptor. In the current study, OXTR expression was identified in α-, β-, and δ-cells of the pancreatic islet by RNA hybridization, and OXT protein expression was observed only in β-cells. In order to examine the contribution of islet OXT/OXTR in glycemic control and islet β-cell heath, we developed a β-cell specific OXTR knock-out (β-KO) mouse.
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