Volume 190, Issue 1 pp. 52-66
Research Paper

Phosphoglycerate dehydrogenase promotes proliferation and bortezomib resistance through increasing reduced glutathione synthesis in multiple myeloma

Xuan Wu

Xuan Wu

Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan, China

Key Laboratory of Carcinogenesis of the Chinese Ministry of Health and the Key Laboratory of Carcinogenesis and Cancer Invasion of Chinese Ministry of Education, Cancer Research Institute, School of Basic Medical Sciences, Central South University, Changsha, Hunan, China

These authors contributed equally to this work.Search for more papers by this author
Jiliang Xia

Jiliang Xia

Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan, China

Key Laboratory of Carcinogenesis of the Chinese Ministry of Health and the Key Laboratory of Carcinogenesis and Cancer Invasion of Chinese Ministry of Education, Cancer Research Institute, School of Basic Medical Sciences, Central South University, Changsha, Hunan, China

These authors contributed equally to this work.Search for more papers by this author
Jingyu Zhang

Jingyu Zhang

Key Laboratory of Carcinogenesis of the Chinese Ministry of Health and the Key Laboratory of Carcinogenesis and Cancer Invasion of Chinese Ministry of Education, Cancer Research Institute, School of Basic Medical Sciences, Central South University, Changsha, Hunan, China

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Yinghong Zhu

Yinghong Zhu

Key Laboratory of Carcinogenesis of the Chinese Ministry of Health and the Key Laboratory of Carcinogenesis and Cancer Invasion of Chinese Ministry of Education, Cancer Research Institute, School of Basic Medical Sciences, Central South University, Changsha, Hunan, China

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Yangbowen Wu

Yangbowen Wu

Xiangya School of Public Health, Central South University, Changsha, Hunan, China

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Jiaojiao Guo

Jiaojiao Guo

Key Laboratory of Carcinogenesis of the Chinese Ministry of Health and the Key Laboratory of Carcinogenesis and Cancer Invasion of Chinese Ministry of Education, Cancer Research Institute, School of Basic Medical Sciences, Central South University, Changsha, Hunan, China

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Shilian Chen

Shilian Chen

Key Laboratory of Carcinogenesis of the Chinese Ministry of Health and the Key Laboratory of Carcinogenesis and Cancer Invasion of Chinese Ministry of Education, Cancer Research Institute, School of Basic Medical Sciences, Central South University, Changsha, Hunan, China

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Qian Lei

Qian Lei

Key Laboratory of Carcinogenesis of the Chinese Ministry of Health and the Key Laboratory of Carcinogenesis and Cancer Invasion of Chinese Ministry of Education, Cancer Research Institute, School of Basic Medical Sciences, Central South University, Changsha, Hunan, China

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Bin Meng

Bin Meng

Key Laboratory of Carcinogenesis of the Chinese Ministry of Health and the Key Laboratory of Carcinogenesis and Cancer Invasion of Chinese Ministry of Education, Cancer Research Institute, School of Basic Medical Sciences, Central South University, Changsha, Hunan, China

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Chunmei Kuang

Chunmei Kuang

Key Laboratory of Carcinogenesis of the Chinese Ministry of Health and the Key Laboratory of Carcinogenesis and Cancer Invasion of Chinese Ministry of Education, Cancer Research Institute, School of Basic Medical Sciences, Central South University, Changsha, Hunan, China

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Xiangling Feng

Xiangling Feng

Xiangya School of Public Health, Central South University, Changsha, Hunan, China

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Yanjuan He

Yanjuan He

Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan, China

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Yi Shen

Yi Shen

Department of Orthopaedic Surgery, Second Xiangya Hospital, Central South University, Changsha, Hunan, China

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Xin Li

Xin Li

Department of Hematology, Third Xiangya Hospital, Central South University, Changsha, Hunan, China

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Lugui Qiu

Lugui Qiu

State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin, China

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Guancheng Li

Corresponding Author

Guancheng Li

Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan, China

Key Laboratory of Carcinogenesis of the Chinese Ministry of Health and the Key Laboratory of Carcinogenesis and Cancer Invasion of Chinese Ministry of Education, Cancer Research Institute, School of Basic Medical Sciences, Central South University, Changsha, Hunan, China

Correspondence: Wen Zhou and Guancheng Li, Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan, China.

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

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Wen Zhou

Corresponding Author

Wen Zhou

Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan, China

Key Laboratory of Carcinogenesis of the Chinese Ministry of Health and the Key Laboratory of Carcinogenesis and Cancer Invasion of Chinese Ministry of Education, Cancer Research Institute, School of Basic Medical Sciences, Central South University, Changsha, Hunan, China

Correspondence: Wen Zhou and Guancheng Li, Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan, China.

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

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First published: 10 February 2020
Citations: 48

Summary

The serine synthesis pathway (SSP) is active in multiple cancers. Previous study has shown that bortezomib (BTZ) resistance is associated with an increase in the SSP in multiple myeloma (MM) cells; however, the underlying mechanisms of SSP-induced BTZ resistance remain unclear. In this study, we found that phosphoglycerate dehydrogenase (PHGDH), the first rate-limiting enzyme in the SSP, was significantly elevated in CD138+ cells derived from patients with relapsed MM. Moreover, high PHGDH conferred inferior survival in MM. We also found that overexpression of PHDGH in MM cells led to increased cell growth, tumour formation, and resistance to BTZ in vitro and in vivo, while inhibition of PHGDH by short hairpin RNA or NCT-503, a specific inhibitor of PHGDH, inhibited cell growth and BTZ resistance in MM cells. Subsequent mechanistic studies demonstrated PHGDH decreased reactive oxygen species (ROS) through increasing reduced glutathione (GSH) synthesis, thereby promoting cell growth and BTZ resistance in MM cells. Furthermore, adding GSH to PHGDH silenced MM cells reversed S phase arrest and BTZ-induced cell death. These findings support a mechanism in which PHGDH promotes proliferation and BTZ resistance through increasing GSH synthesis in MM cells. Therefore, targeting PHGDH is a promising strategy for MM therapy.

Conflict of interest

The authors have no conflicts of interest to disclose.

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