Volume 193, Issue 5 pp. 928-940
Research Paper

Bone marrow mesenchymal stromal cells in chronic myelomonocytic leukaemia: overactivated WNT/β-catenin signalling by parallel RNA sequencing and dysfunctional phenotypes

Ruohao Xu

Ruohao Xu

Department of Hematology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510080 P.R. China

Ruohao Xu and Xin Huang contributed equally to this article.

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Xin Huang

Xin Huang

Department of Hematology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510080 P.R. China

Ruohao Xu and Xin Huang contributed equally to this article.

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Chao Li

Chao Li

Department of Hematology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510080 P.R. China

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Chengxin Deng

Chengxin Deng

Department of Hematology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510080 P.R. China

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Minming Li

Minming Li

Department of Hematology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510080 P.R. China

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Ping Wu

Ping Wu

Department of Hematology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510080 P.R. China

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Suxia Geng

Suxia Geng

Department of Hematology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510080 P.R. China

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Peilong Lai

Peilong Lai

Department of Hematology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510080 P.R. China

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Zesheng Lu

Zesheng Lu

Department of Hematology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510080 P.R. China

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Jianyu Weng

Corresponding Author

Jianyu Weng

Department of Hematology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510080 P.R. China

Correspondence: Jianyu Weng M.D., Ph.D. and Xin Du M.D., Ph.D., Department of Hematology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510080, P.R. China.

E-mail: [email protected]; [email protected]; [email protected]

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Xin Du

Corresponding Author

Xin Du

Department of Hematology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510080 P.R. China

Correspondence: Jianyu Weng M.D., Ph.D. and Xin Du M.D., Ph.D., Department of Hematology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510080, P.R. China.

E-mail: [email protected]; [email protected]; [email protected]

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First published: 06 May 2021
Citations: 4

Summary

Sophisticated cross-talk between bone marrow mesenchymal stromal cells (BM MSCs) and haematopoietic/leukaemic stem cells in patients with myelodysplastic syndromes (MDS) and myeloid leukaemia have been emphasized in previous reports. However, mesenchymal elements in patients with chronic myelomonocytic leukaemia (CMML) were poorly investigated. By utilizing a parallel RNA-sequencing method, we investigated the transcriptional profile and functional defects of primary BM MSCs from patients with CMML for the first time. Within a 24-patient cohort, transcriptional and functional analysis reveals a prominent enrichment of WNT/β-catenin signalling and multiple biology processes. Deregulated expression of WNT/β-catnin factors CTNNB1, CMYC, LEF1, and FRZB is associated with impaired proliferation, senescence phenotype, and abnormal secretion in CMML MSCs. The impaired ability to support healthy CD34+ haematopoietic stem and progenitor cells (HSPCs) correlates with activation of WNT/β-catenin signalling in CMML MSCs. Furthermore, we observed an association between WNT/β-catenin factors and treatment response to hypomethylating agents (HMAs) in a cohort of patients with MDS/myeloproliferative neoplasms (MPNs). Taken together, our study provides evidence for transcriptional and functional abnormalities in CMML MSCs, and suggests potential prognostic value of evaluating WNT/β-catenin signalling in patients with CMML.

Conflicts of interest

The authors declare no conflicts of interest.

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