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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