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He Q, Kong L, Shi W, Ma D, Liu K, Yang S, Xin Q, Jiang C, Wu J. Ezetimibe inhibits triple-negative breast cancer proliferation and promotes cell cycle arrest by targeting the PDGFR/AKT pathway. Heliyon 2023; 9:e21343. [PMID: 38027998 PMCID: PMC10651468 DOI: 10.1016/j.heliyon.2023.e21343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 10/17/2023] [Accepted: 10/19/2023] [Indexed: 12/01/2023] Open
Abstract
Cholesterol levels were strongly associated with tumor progression and metastasis. Targeted cholesterol metabolism has broad prospects in tumor treatment. Ezetimibe, the only FDA-approved inhibitor of cholesterol absorption, has been reported to be able to inhibit angiogenesis in liver cancer. However, the efficacy and specific mechanisms of Ezetimibe in the treatment of Triple-Negative Breast Cancer (TNBC)have not been reported. Our research shows Ezetimibe inhibits TNBC cell proliferation and blocks the cell cycle in the G1 phase. Mechanistically, Ezetimibe inhibits the activation of PDGFRβ/AKT pathway, thereby promoting cell cycle arrest and inhibiting cell proliferation. By overexpressing PDGFRβ in TNBC cells, we found that PDGFRβ significantly reduced the inhibitory effect of Ezetimibe on TNBC cell proliferation and the cell cycle. Similarly, SC79, an AKT agonist, can reduce the proliferation inhibitory and cycle-blocking effects of Ezetimibe on TNBC cells. Furthermore, the AKT inhibitor MK2206 enhanced the inhibitory effect of Ezetimibe on the cell cycle and proliferation ability of TNBC cells overexpressing PDGFRβ. In xenograft tumor models, we also found that Ezetimibe inhibited TNBC growth, an effect that can be blocked by overexpression of PDGFR or activation of AKT. In summary, we have demonstrated that EZ inhibits the PDGFR/AKT pathway, thereby halting TNBC cycle progression and tumor growth.
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Affiliation(s)
- Qinyu He
- State Key Laboratory of Pharmaceutical Biotechnology, National Institute of Healthcare Data Science at Nanjing University, Jiangsu Key Laboratory of Molecular Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Medical School, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu, 210093 China
| | - Lingkai Kong
- State Key Laboratory of Pharmaceutical Biotechnology, National Institute of Healthcare Data Science at Nanjing University, Jiangsu Key Laboratory of Molecular Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Medical School, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu, 210093 China
| | - Weiwei Shi
- State Key Laboratory of Pharmaceutical Biotechnology, National Institute of Healthcare Data Science at Nanjing University, Jiangsu Key Laboratory of Molecular Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Medical School, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu, 210093 China
| | - Ding Ma
- State Key Laboratory of Pharmaceutical Biotechnology, National Institute of Healthcare Data Science at Nanjing University, Jiangsu Key Laboratory of Molecular Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Medical School, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu, 210093 China
- Department of Gastroenterology, Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Kua Liu
- State Key Laboratory of Pharmaceutical Biotechnology, National Institute of Healthcare Data Science at Nanjing University, Jiangsu Key Laboratory of Molecular Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Medical School, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu, 210093 China
| | - Shuwei Yang
- State Key Laboratory of Pharmaceutical Biotechnology, National Institute of Healthcare Data Science at Nanjing University, Jiangsu Key Laboratory of Molecular Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Medical School, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu, 210093 China
| | - Qilei Xin
- Jinan Microecological Biomedicine Shandong Laboratory, Shounuo City Light West Block, Qingdao Road 3716#, Huaiyin District, Jinan City, Shandong Province, China
| | - Chunping Jiang
- Jinan Microecological Biomedicine Shandong Laboratory, Shounuo City Light West Block, Qingdao Road 3716#, Huaiyin District, Jinan City, Shandong Province, China
- State Key Laboratory of Pharmaceutical Biotechnology, National Institute of Healthcare Data Science at Nanjing University, Jiangsu Key Laboratory of Molecular Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Medical School, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu, 210093 China
| | - Junhua Wu
- Jinan Microecological Biomedicine Shandong Laboratory, Shounuo City Light West Block, Qingdao Road 3716#, Huaiyin District, Jinan City, Shandong Province, China
- State Key Laboratory of Pharmaceutical Biotechnology, National Institute of Healthcare Data Science at Nanjing University, Jiangsu Key Laboratory of Molecular Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Medical School, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu, 210093 China
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Rasi G, Silecchia G, Sinibaldi-Vallebona P, Spaziani E, Pierimarchi P, Sivilia M, Tremiterra S, Garaci E. Anti-tumor effect of combined treatment with thymosin alpha 1 and interleukin-2 after 5-fluorouracil in liver metastases from colorectal cancer in rats. Int J Cancer 1994; 57:701-5. [PMID: 8194879 DOI: 10.1002/ijc.2910570516] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
We studied the effect of combined chemo-immunotherapy, 5-FU followed by thymosin alpha 1 (T alpha 1) and interleukin-2 (IL-2) at low doses, on liver metastases from colorectal cancer, induced by splenic injection of DHD/K12 cells (1,2-dimethylhydrazine-induced colon adenocarcinoma) in syngeneic BDIX rats. The presence of liver metastases was checked by laparotomy 14 days after tumor-cell injection. Evaluable rats were assigned randomly to 5 experimental groups designated as control, 5-FU, IL-2, 5-FU/IL-2 and 5-FU/T alpha 1/IL-2. 5-FU was administered i.v. as a continuous infusion for 7 days by an osmotic device implanted surgically. T alpha 1 and IL-2 were administered for 4 days and repeated after 11 days. Combined chemo-immunotherapy was shown both to significantly reduce the growth of liver metastases and to prevent extra-hepatic spread. 5-FU/T alpha 1/IL-2 also improved survival rate. Combined immunotherapy after 5-FU restored NK activity of the peripheral-blood-mononuclear-cell (PBMC) in tumor and/or 5-FU immunodepressed rats and enhanced PBMC cytotoxic activity against the DHD/K12 autologous cell line. This model was devised to mimic the clinical situation of unresectable liver metastases.
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Affiliation(s)
- G Rasi
- Istituto di Medicina Sperimentale, Consiglio Nazionale delle Ricerche (CNR), Rome, Italy
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Vértesi C. Immune response developing in tumorous organism as a result of immunotherapy. Chance of recovery? Med Hypotheses 1993; 40:335-41. [PMID: 8377670 DOI: 10.1016/0306-9877(93)90214-b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
S-allylgutimine has immunostimulant and tumor cell inhibitory activities. This complex action may be a result of the stimulation of IL-2 production. The effectiveness of immunotherapy depends on the uncoupling of IL-2 downregulation. This principle can be widely used with those immunological diseases where IL-2 level is decreased through downregulation. The Kokonov reaction, which was used originally to indicate tumors, is presumably a marker of immunoreactivity. According to one hypothesis no specific antigen can be found on the surface of neoplastic cells but another type, 'weak antigen' appears, which originates from the alteration of a cell surface glycoprotein beta 1-6 saccharide chain branching that is directly related to the increased immune reactivity. The inhibition of downregulation enhances the elimination of neoplastic cells whose membrane surface glycoproteins are altered.
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Affiliation(s)
- C Vértesi
- Pharmacological Laboratory of CHINOIN Pharmaceutical and Chemical Works Co. Ltd, Budapest, Hungary
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