Selective depletion of cultured macrophages by magnetite nanoparticles modified with gelatin.

Abstract:

:Previous studies have indicated pro-tumor functions of macrophages in tumor progression in different types of malignant tumors. The detailed mechanisms of cell-cell interaction between macrophages and tumor cells have been investigated by means of in vitro co-culture experiments. The present study developed magnetite nanoparticles modified with gelatin that are specifically engulfed by macrophages and investigated methods to deplete these macrophages in co-culture experiments using a magnet. T98G glioma cell line and human monocyte-derived macrophages were mixed and co-cultured for 2 days. The T98G cells were isolated by depletion of the macrophages using the magnetite nanoparticles. mRNA expression of a number of pro-tumor molecules in the isolated T98G cells, with or without co-culture with macrophages, was then evaluated. The mRNA expression levels of chemokine (CC motif) ligand 2, interleukin-6 and macrophage-colony stimulating factor receptor (M-CSFR) were significantly upregulated in T98G cells by co-culture with macrophages (P<0.01). M-CSFR protein expression was also increased by co-culture with macrophages. The conditioned medium of co-cultured cells increased M-CSFR expression in T98G cells. Magnetite nanoparticles may be a novel tool not only for investigating the unique activation status of tumor cells in co-culture conditions, but also for targeting pro-tumor macrophages in tumor tissues.

journal_name

Exp Ther Med

authors

Komohara Y,Kawauchi R,Makiyama E,Mikami K,Horlad H,Fujiwara Y,Kida T,Takeya M,Niidome T

doi

10.3892/etm.2017.4640

subject

Has Abstract

pub_date

2017-08-01 00:00:00

pages

1640-1646

issue

2

eissn

1792-0981

issn

1792-1015

pii

ETM-0-0-4640

journal_volume

14

pub_type

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