LSD1 Modulates the Bone Metastasis of Breast Cancer Cells Through HnRNPA2B1-mediated Sorting of Exosomal MiRNAs

Overview

Journal Cell Death Discov

Date 2024 Mar 6

PMID 38448424

Authors

Ziyu Liu

Benkai Xin

Nan Zhang

Peipei An

Yueru Shi

Jingtong Yang

Youzhong Wan

Yuquan He

Xin Hu

Affiliations

Soon will be listed here.

Abstract

Bone metastasis is a key contributor to morbidity and mortality of breast cancer patients. We have previously shown that exosomal miRNAs derived from LSD1 knockdown (KD) breast cancer cells inhibit osteoblast differentiation and promote osteoclast differentiation. However, how LSD1 regulates exosomal miRNAs and whether miRNAs promote bone metastasis through the formation of pre-metastatic niches remains unclear. In vivo experiments demonstrates that exosomes derived from LSD1 KD breast cancer cells significantly promoted bone metastasis. To explore the mechanism underlying the effect of LSD1 on exosomes in breast cancer cells, exosomal and cellular miRNAs from control, LSD1 KD, and rescue cells were sequenced. Interestingly, approximately 80% of LSD1-associated miRNAs were downregulated in exosomes from LSD1 KD cells. The consensus sequence UAGGGC, was identified in many miRNAs downregulated in LSD1 KD exosomes. We found that hnRNPA2B1 regulated the exosomal sorting of miR-6881-3p and some other miRNAs. LSD1 deficiency reduced hnRNPA2B1 expression in breast cancer cells by decreasing the level of H3K9me2 demethylation in the promoter region of the hnRNPA2B1 gene. Our study revealed that LSD1 plays a crucial role in the regulation of exosomal sorting of miRNA.

Citing Articles

LSD1 deficiency in breast cancer cells promotes the formation of pre-metastatic niches.

Yao Y, Qian R, Gao H, Dai Y, Shi Y, An P NPJ Precis Oncol. 2024; 8(1):260.

PMID: 39528717 PMC: 11555121. DOI: 10.1038/s41698-024-00751-2.

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