Tianjin Medical Journal ›› 2023, Vol. 51 ›› Issue (11): 1158-1163.doi: 10.11958/20230438

• Cell and Molecular Biology • Previous Articles     Next Articles

Investigation on the determination of tumor-associated macrophages inducing the drug resistance of albumin-bound paclitaxel in triple-negative breast cancer cells by activating IGF-1R signaling pathway

LIU Shujuan1,2(), LIU Mengying1, SU Wuyun3, DOU Jia3, WANG Wei3,△()   

  1. 1. The First Clinical College of Inner Mongolia Medical University, Hohhot 010059, China
    2. Department of Internal Medicine, Inner Mongolia A Rong Qi People's Hospital
    3. Department of Oncology, Affiliated Hospital of Inner Mongolia Medical University
  • Received:2023-03-27 Revised:2023-05-23 Published:2023-11-15 Online:2023-11-07
  • Contact: △E-mail:656225284@qq.com

Abstract:

Objective To investigate the effect of tumor-associated macrophages (TAM) on the chemosensitivity of triple-negative breast cancer (TNBC) cells to albumin-bound paclitaxel (Nab-PTX). Methods TAM model was constructed and identified. TNBC cell line MDA-MB-231 was established by Transwell cell co-culture method. They were divided into the control group (MDA-MB-231 cells and blank chamber), the Nab-PTX group (MDA-MB-231 cells, blank chamber and 0.5 nmol/L Nab-PTX), the TAM group (MDA-MB-231 cells, containing M2-type macrophages), the TAM+Nab-PTX group (MDA-MB-231 cells, cells containing M2-type macrophages and 0.5 nmol/L Nab-PTX) and the insulin-like growth factor 1 receptor (IGF-1R) inhibitor group (MD-MB-231 cells, macrophage compartment containing M2-type, 0.5 nmol/L Nab-PTX and 4 nmol/L IGF-1R inhibitor Linsitinib). The cell survival rate of each group was determined by CCK-8 method. Flow cytometry was used to detect cell apoptosis. The mRNA levels of multidrug resistant protein (MDR) 1 and Caspase-3 were detected by real-time quantitative PCR (qPCR). The key proteins of IGF-1R signaling pathway were detected by Western blot assay. Results THP-1 cells were induced to differentiate into M2 macrophages. Compared with the Nab-PTX group, the cell proliferation rate was increased and apoptosis rate was decreased in the TAM+Nab-PTX group (P<0.01). The mRNA expression of MDR1was increased and Caspase-3 mRNA was decreased (P<0.05). The key protein of IGF-1R signaling pathway was activated (P<0.01). Compared with the TAM+Nab-PTX group, the proliferation rate was decreased and apoptosis rate of cells was increased in the IGF-1R inhibitor group. The mRNA expression of MDR1 was decreased, the mRNA expression of Caspase3 was increased, and the expression of key proteins in IGF-1R signaling pathway was decreased (P<0.01). Conclusion TAM may induce resistance of TNBC cells to Nab-PTX by activating IGF-1R signaling pathway.

Key words: tumor-associated macrophages, triple negative breast neoplasms, albumin-bound paclitaxel, drug tolerance, receptor, IGF type 1

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