An in vitro model mimicking the complement system to favor directed phagocytosis of unwanted cells

Autor: Ivonne M. Bartsch, Karen Perelmuter, Mariela Bollati-Fogolín, Angelo Bartsch J., Fanny Guzmán, Sergio H. Marshall
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Electronic Journal of Biotechnology, Vol 49, Iss , Pp 5-13 (2021)
Druh dokumentu: article
ISSN: 0717-3458
DOI: 10.1016/j.ejbt.2020.09.010
Popis: Background: Opsonization, is the molecular mechanism by which target molecules promote interactions with phagocyte cell surface receptors to remove unwanted cells by induced phagocytosis. We designed an in vitro system to demonstrate that this procedure could be driven to eliminate adipocytes, using peptides mimicking regions of the complement protein C3b to promote opsonization and enhance phagocytosis. Two cell lines were used: (1) THP-1 monocytes differentiated to macrophages, expressing the C3b opsonin receptor CR1 in charge of the removal of unwanted coated complexes; (2) 3T3-L1 fibroblasts differentiated to adipocytes, expressing AQP7, to evaluate the potential of peptides to stimulate opsonization. (3) A co-culture of the two cell lines to demonstrate that phagocytosis could be driven to cell withdrawal with high efficiency and specificity. Results: An array of peptides were designed and chemically synthesized p3691 and p3931 joined bound to the CR1 receptor activating phagocytosis (p
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