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Song B, Wang J, Ren Y, Su Y, Geng X, Yang F, Wang H, Zhang J. Butein inhibits cancer cell growth by rescuing the wild-type thermal stability of mutant p53. Biomed Pharmacother 2023; 163:114773. [PMID: 37156116 DOI: 10.1016/j.biopha.2023.114773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 04/15/2023] [Accepted: 04/22/2023] [Indexed: 05/10/2023] Open
Abstract
p53 is a transcription factor that activates the expression of various genes involved in the maintenance of genomic stability, and more than 50% of cancers harbor inactivating p53 mutations, which are indicative of highly aggressive cancer and poor prognosis. Pharmacological targeting of mutant p53 to restore the wild-type p53 tumor-suppressing function is a promising strategy for cancer therapy. In this study, we identified a small molecule, Butein, that reactivates mutant p53 activity in tumor cells harboring the R175H or R273H mutation. Butein restored wild-type-like conformation and DNA-binding ability in HT29 and SK-BR-3 cells harboring mutant p53-R175H and mutant p53-R273H, respectively. Moreover, Butein enabled the transactivation of p53 target genes and decreased the interactions of Hsp90 with mutant p53-R175H and mutant p53-R273H proteins, while Hsp90 overexpression reversed targeted p53 gene activation. In addition, Butein induced thermal stabilization of wild-type p53, mutant p53-R273H and mutant p53-R175H, as determined via CETSA. From docking study, we further proved that Butein binding to p53 stabilized the DNA-binding loop-sheet-helix motif of mutant p53-R175H and regulated its DNA-binding activity via an allosteric mechanism, conferring wild-type-like the DNA-binding activity of mutant p53. Collectively, the data suggest that Butein is a potential antitumor agent that restores p53 function in cancers harboring mutant p53-R273H or mutant p53-R175H. SIGNIFICANCE: Butein restores the ability of mutant p53 to bind DNA by reversing its transition to the Loop3 (L3) state, endows p53 mutants with thermal stability and re-establishes their transcriptional activity to induce cancer cell death.
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Affiliation(s)
- Bin Song
- Lab of Molecular Pharmacology, Medical School, Kunming University of Science and Technology, Kunming 650500, China; Laboratory of Radiation Medicine, West China Second University Hospital, Sichuan University, Chengdu 610041, China
| | - Jiajian Wang
- Lab of Molecular Pharmacology, Medical School, Kunming University of Science and Technology, Kunming 650500, China
| | - Yixin Ren
- School of Pharmacy, Minzu University of China, Beijing 100081, China
| | - Yongnan Su
- Lab of Molecular Pharmacology, Medical School, Kunming University of Science and Technology, Kunming 650500, China
| | - Xueye Geng
- Lab of Molecular Pharmacology, Medical School, Kunming University of Science and Technology, Kunming 650500, China
| | - Fan Yang
- Lab of Molecular Pharmacology, Medical School, Kunming University of Science and Technology, Kunming 650500, China
| | - Hao Wang
- School of Pharmacy, Minzu University of China, Beijing 100081, China
| | - Jihong Zhang
- Lab of Molecular Pharmacology, Medical School, Kunming University of Science and Technology, Kunming 650500, China; Yunnan Province Clinical Research Center for Hematologic Disease, Kunming 650032, China.
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Bae WB, Kim HJ, Jhee KH. Selective Homocysteine Assay with Cucurbit[7]uril by pH Regulation. J Microbiol Biotechnol 2022; 32:514-521. [PMID: 35131958 PMCID: PMC9628864 DOI: 10.4014/jmb.2201.01016] [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: 01/14/2022] [Accepted: 01/21/2022] [Indexed: 12/15/2022]
Abstract
We report the effect of pH on the supramolecular complexation of two biothiols, viz., homocysteine (Hcy) and cysteine (Cys), with cucurbit[7]uril (CB[7]). Under basic pH conditions, Cys did not complex with CB[7], whereas Hcy efficiently complexed with CB[7], as confirmed by 1H NMR spectroscopy and Ellman's reagent (5,5'-dithio-bis(2-nitrobenzoic acid), DTNB) assay. 1H NMR and Raman spectroscopic studies revealed that, in the absence of CB[7], Hcy auto-oxidized slowly (~36 h) to homocystine (HSSH) under basic pH conditions. However, the rate of Hcy oxidation increased by up to 150 fold in the presence of CB[7], as suggested by the DTNB assay. Thus, supramolecular complexation under basic pH conditions led to the formation of a HSSH-CB[7] complex, and not Hcy-CB[7]. The results indicate that Hcy is rapidly oxidized to HSSH under the catalysis of CB[7], which acts as a reaction chamber, in basic pH conditions. Our studies suggest that Hcy concentration, a risk factor for cardiovascular disease, can be selectively and more easily quantified by supramolecular complexation with CB [7].
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Affiliation(s)
- Won-Bin Bae
- Department of Applied Chemistry, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea
| | - Hee-Joon Kim
- Department of Applied Chemistry, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea,
H.-J. Kim Phone: +82-54-478-7822 E-mail:
| | - Kwang-Hwan Jhee
- Department of Applied Chemistry, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea,Corresponding authors K.-H. Jhee Phone: +82-54-478-7837 Fax: +82-54-478-7710 E-mail:
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3
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Jiang C, Xiao D, Yang P, Tao W, Song Z, He H. Simple and fast detection of homocysteine by cucurbit[7]uril fluorescent probe based on competitive strategy. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Chen J, Gao T, Chang Y, Wei Y, Wang Y. Supramolecular complexation between cucurbit[7]uril and folate and analytical applications. JOURNAL OF CHEMICAL RESEARCH 2021. [DOI: 10.1177/17475198211066489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Folate (FA) plays a key role in the biosynthesis of amino acids, purines, and pyrimidines in the human body, and intracellular folate metabolism has become an attractive target of tumor chemotherapy. In this work, an inclusion interaction was found between FA and cucurbit[7]uril (CB[7]), and the formation of a CB[7]-FA 2:1 supramolecular inclusion complex was confirmed by fluorescence spectra, UV-Vis absorption spectroscopy, 1H NMR, and molecular modeling calculations. In addition, FA is generally determined through the indirect fluorescent method because it shows weak fluorescence in aqueous solution. Therefore, a simple, direct fluorescence probe method for rapidly measuring FA was investigated, and the linear equation of FA was ΔF = 14.691C + 37.366 within the concentration ranges of 0.82 ~ 18.31 µg mL–1. The proposed direct fluorescence method was applied to the determination of spiked plasma. We demonstrated that this method could provide an experimental basis for the targeted administration of the CB[7]-FA complex, and it could be extended as a promising fluorescence detection method for drugs in vivo.
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Affiliation(s)
- Jue Chen
- Shanxi University of Chinese Medicine, Taiyuan, P.R. China
| | - Tengmei Gao
- Shanxi University of Chinese Medicine, Taiyuan, P.R. China
| | - Yinxia Chang
- Shanxi University of Chinese Medicine, Taiyuan, P.R. China
| | - Yanming Wei
- Shanxi University of Chinese Medicine, Taiyuan, P.R. China
| | - Yonghui Wang
- Shanxi University of Chinese Medicine, Taiyuan, P.R. China
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Lee MJ, Shee NK, Son JI, Karthikeyan S, Jhee KH, Lee JY, Kim HJ. Supramolecular complexation of homocysteine and cysteine with cucurbit[7]uril. Supramol Chem 2019. [DOI: 10.1080/10610278.2019.1593414] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Min Jung Lee
- Department of Applied Chemistry, Kumoh National Institute of Technology, Gumi, Republic of Korea
| | - Nirmal K. Shee
- Department of Applied Chemistry, Kumoh National Institute of Technology, Gumi, Republic of Korea
| | - Jung-In Son
- Department of Applied Chemistry, Kumoh National Institute of Technology, Gumi, Republic of Korea
| | | | - Kwang-Hwan Jhee
- Department of Applied Chemistry, Kumoh National Institute of Technology, Gumi, Republic of Korea
| | - Jin Yong Lee
- Department of Chemistry, Sungkyunkwan University, Suwon, Republic of Korea
| | - Hee-Joon Kim
- Department of Applied Chemistry, Kumoh National Institute of Technology, Gumi, Republic of Korea
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