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Ipecac root extracts and isolated circular peptides differentially suppress inflammatory immune response characterised by proliferation, activation and degranulation capacity of human lymphocytes in vitro

Falanga, Chiara Madlen and Steinborn, Carmen and Muratspahić, Edin and Zimmermann-Klemd, Amy Marisa and Winker, Moritz and Krenn, Liselotte and Huber, Roman and Gruber, Christian W. and Gründemann, Carsten. (2022) Ipecac root extracts and isolated circular peptides differentially suppress inflammatory immune response characterised by proliferation, activation and degranulation capacity of human lymphocytes in vitro. Biomedicine and Pharmacotherapy, 152. p. 113120.

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Abstract

Circular peptides are attractive lead compounds for drug development; this study investigates the immunomodulatory effects of defined root powder extracts and isolated peptides (called cyclotides) from Carapichea ipecacuanha (Brot.) L. Andersson ('ipecac'). Changes in the viability, proliferation and function of activated human primary T cells were analysed using flow cytometry-based assays. Three distinct peptide-enriched extracts of pulverised ipecac root material were prepared via C; 18; solid-phase extraction and analysed by reversed-phase HPLC and mass spectrometry. These extracts induced caspase 3/7 dependent apoptosis, thus leading to a suppressed proliferation of activated T cells and a reduction of the number of cells in the G2 phase. Furthermore, the stimulated T cells had a lower activation potential and a reduced degranulation capacity after treatment with ipecac extracts. Six different cyclotides were isolated from C. ipecacuanha and an T cell proliferation inhibiting effect was determined. Furthermore, the degranulation capacity of the T cells was diminished specifically by some cyclotides. In contrast to kalata B1 and its analog T20K, secretion of IL-2 and IFN- γ was not affected by any of the caripe cyclotides. The findings add to our increased understanding of the immunomodulating effects of cyclotides, and may provide a basis for the use of ipecac extracts for immunomodulation in conditions associated with an exessive immune responses.
Faculties and Departments:05 Faculty of Science > Departement Pharmazeutische Wissenschaften > Pharmazie > Translationale Komplementärmedizin (Gründemann)
UniBasel Contributors:Gründemann, Carsten and Winker, Moritz and Zimmermann-Klemd, Amy Marisa
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Elsevier
ISSN:0753-3322
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
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Last Modified:10 Jun 2022 12:00
Deposited On:10 Jun 2022 12:00

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