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Li J, Wang Y, Shen W, Zhang Z, Su Z, Guo X, Pei P, Hu L, Liu T, Yang K, Guo L. Mitochondria-Modulating Liposomes Reverse Radio-Resistance for Colorectal Cancer. Adv Sci (Weinh) 2024:e2400845. [PMID: 38520732 DOI: 10.1002/advs.202400845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 02/28/2024] [Indexed: 03/25/2024]
Abstract
Complete remission of colorectal cancer (CRC) is still unachievable in the majority of patients by common fractionated radiotherapy, leaving risks of tumor metastasis and recurrence. Herein, clinical CRC samples demonstrated a difference in the phosphorylation of translation initiation factor eIF2α (p-eIF2α) and the activating transcription factor 4 (ATF4), whose increased expression by initial X-ray irradiation led to the resistance to subsequent radiotherapy. The underlying mechanism is studied in radio-resistant CT26 cells, revealing that the incomplete mitochondrial outer membrane permeabilization (iMOMP) triggered by X-ray irradiation is key for the elevated expression of p-eIF2α and ATF4, and therefore radio-resistance. This finding guided to discover that metformin and 2-DG are synergistic in reversing radio resistance by inhibiting p-eIF2α and ATF4. Liposomes loaded with metformin and 2-DG (M/D-Lipo) are thus prepared for enhancing fractionated radiotherapy of CRC, which achieved satisfactory therapeutic efficacy in both local and metastatic CRC tumors by reversing radio-resistance and preventing T lymphocyte exhaustion.
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Affiliation(s)
- Junmei Li
- Department of Pathology, the First Affiliated Hospital of Soochow University, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Yuhong Wang
- Department of Pathology, the First Affiliated Hospital of Soochow University, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Wenhao Shen
- Department of Oncology, Taizhou People's Hospital Affiliated to Nanjing Medical University, Taizhou, 225300, China
| | - Ziyu Zhang
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection & School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou Medical College, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Zhiyue Su
- Department of Pathology, the First Affiliated Hospital of Soochow University, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Xia Guo
- Department of Pathology, the First Affiliated Hospital of Soochow University, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Pei Pei
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection & School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou Medical College, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Lin Hu
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection & School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou Medical College, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Teng Liu
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection & School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou Medical College, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Kai Yang
- Department of Pathology, the First Affiliated Hospital of Soochow University, Soochow University, Suzhou, Jiangsu, 215123, China
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection & School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou Medical College, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Lingchuan Guo
- Department of Pathology, the First Affiliated Hospital of Soochow University, Soochow University, Suzhou, Jiangsu, 215123, China
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