1
|
Li XY, Cui X, Xie CQ, Wu Y, Song T, He JD, Feng J, Cui QR, Bin JL, Li QY, Xiao C, Deng JH, Lu GD, Zhou J. Andrographolide causes p53-independent HCC cell death through p62 accumulation and impaired DNA damage repair. Phytomedicine 2023; 121:155089. [PMID: 37738908 DOI: 10.1016/j.phymed.2023.155089] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 08/28/2023] [Accepted: 09/11/2023] [Indexed: 09/24/2023]
Abstract
BACKGROUND Hepatocellular carcinoma (HCC) is a highly lethal cancer characterized by dominant driver mutations, including p53. Consequently, there is an urgent need to search for novel therapeutic agents to treat HCC. Andrographolide (Andro), a clinically available anti-inflammatory phytochemical agent, has shown inhibitory effects against various types of cancer, including HCC. However, the underlying molecular mechanisms of its action remain poorly understood. PURPOSE This study aims to investigate the molecular mechanisms by which p53 and p62 collectively affect Andro-induced HCC cell death, using both in vitro and in vivo models. METHODS In vitro cellular experiments were conducted to examine the effects of Andro on cell viability and elucidate its mechanisms of action. In vivo xenograft experiments further validated the anti-cancer effects of Andro. RESULTS Andro induced dose- and time-dependent HCC cell death while sparing normal HL-7702 hepatocytes. Furthermore, Andro caused DNA damage through the generation of reactive oxygen species (ROS), a critical event leading to cell death. Notably, HCC cells expressing p53 exhibited greater resistance to Andro-induced cell death compared to p53-deficient cells, likely due to the ability of p53 to induce G2/M cell cycle arrest. Additionally, Andro-induced p62 aggregation led to the proteasomal degradation of RAD51 and 53BP1, two key proteins involved in DNA damage repair. Consequently, silencing or knocking out p62 facilitated DNA damage repair and protected HCC cells. Importantly, disruption of either p53 or p62 did not affect the expression of the other protein. These findings were further supported by the observation that xenograft tumors formed by p62-knockout HCC cells displayed increased resistance to Andro treatment. CONCLUSION This study elucidates the mechanistic basis of Andro-induced HCC cell death. It provides valuable insights for repurposing Andro for the treatment of HCC, regardless of the presence of functional p53.
Collapse
Affiliation(s)
- Xin-Yu Li
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, Guangxi, China, 530021
| | - Xuan Cui
- Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning, Guangxi, China, 530021
| | - Chang-Quan Xie
- Department of Guangxi Medical University Cancer Hospital & Guangxi Cancer Institute, Nanning, Guangxi, China, 530021
| | - Yong Wu
- Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning, Guangxi, China, 530021
| | - Tang Song
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, Guangxi, China, 530021
| | - Jin-Di He
- Department of Guangxi Medical University Cancer Hospital & Guangxi Cancer Institute, Nanning, Guangxi, China, 530021
| | - Ji Feng
- Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning, Guangxi, China, 530021
| | - Qian-Ru Cui
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, Guangxi, China, 530021
| | - Jin-Lian Bin
- Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning, Guangxi, China, 530021
| | - Qiu-Yun Li
- Department of Guangxi Medical University Cancer Hospital & Guangxi Cancer Institute, Nanning, Guangxi, China, 530021
| | - Cheng Xiao
- Institute of Clinical Medicine, China-Japan Friendship Hospital, Beijing, China, 100029
| | - Jing-Huan Deng
- Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning, Guangxi, China, 530021
| | - Guo-Dong Lu
- Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning, Guangxi, China, 530021; Department of Toxicology, School of the Public Health, Fudan University, Shanghai, China, 200032; Key Laboratory of Early Prevention and Treatment for Regional High Frequency Tumor (Guangxi Medical University), Ministry of Education, Guangxi Key laboratory of High-Incidence-Tumor Prevention & Treatment (Guangxi Medical University), Nanning, Guangxi, China, 530021.
| | - Jing Zhou
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, Guangxi, China, 530021; Key Laboratory of Basic Research on Regional Diseases (Guangxi Medical University), Ministry of Education, Nanning, Guangxi, China, 530021.
| |
Collapse
|
2
|
He JD, Kong C, Gao RY, Yin F, Zhang Y, Qin HL. [Effects of probiotics on the intestinal microecological abnormalities and colorectal cancer of mice induced by high-fat diet]. Zhonghua Wei Chang Wai Ke Za Zhi 2020; 23:77-85. [PMID: 32594730 DOI: 10.3760/cma.j.cn.441530-20200417-00223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To establish the mice colorectal cancer (CRC) model induced by AOM/DSS with the intervention of high fat diet and probiotics, and to explore the potential mechanism of probiotics intervention in regulating intestinal flora disturbance and antitumor efficiency. Methods: Forty 8-week-old male C57BL/6J mice were randomly divided into 4 groups with 10 mice in each group: HFD group, HDF with probiotics intervention (HFD+P) group, normal diet (ND) group, normal diet with probiotics intervention (ND+P) group. The probiotic groups were administered with probiotics preparation by gavage. During the experiment, AOM/DSS was used to induce mouse colorectal cancer model. The mouse body weight was regularly recorded and the body status was evaluated weekly. High-throughput 16S rDNA sequencing was used to analyze the changes of fecal flora in bacterial structure before and after cancer induction. At the end of the experiment, intestinal tissues of mice were collected and the epididymis adipose mass (EAM) and tumor burden were recorded. The Alpha diversity index was used to analyze the abundance and diversity of the intestinal flora (higher chaol index means higher abundance of bacteria and greater Simpson index means lower diversity in flora structure). The Beta diversity index was used to analyze the significance of the difference in the distribution of intestinal flora among the four groups (When R>0, the difference in the distribution of bacteria among the groups is greater than the difference within the group). Results: After 15 weeks of experiment, the body weight of mice in HFD group, HFD+P group, ND group and ND+P group was (33.70±0.52) g, (28.70±0.32) g, (25.90±0.34) g and (25.60±0.40) g, whose difference was statistically significant (F=700.89, P<0.01). The body weight of HFD group was higher than that of ND group and HFD+P group while the body weight of HFD+P group was still higher than that of ND group, and the differences were statistically significant (all P<0.017). The average EAM of HFD group, HFD+P group, ND group and ND+P group was (1.36±0.15) g, (0.67±0.08) g, (0.58±0.10) g and (0.54±0.05) g, whose difference was statistically significant (F=114.03, P<0.01). Pairwise comparisons showed that EAM in HFD group was higher than that in ND group and HFD+P group respectively, with statistically significant difference (both P<0.01), while average EAM of HFD+P group was similar to ND group (P=0.09). Under the diet intervention, the Chao1 index of HFD group, HFD+P group, ND group and ND+P group was 217.62, 235.32, 301.51 and 305.71 respectively, and the Simpson index was 0.93, 0.89, 0.91 and 0.90. At the same time, the Anosim analysis of Beta diversity analysis showed that the difference in the flora distribution among four groups was greater than the difference with in each group with statistically significant difference (R=0.655, P=0.001). Species abundance analysis revealed that, compared with ND group, at phylum level, HFD group had a higher proportion of Bacteroides phylum and Firmicutes phylum in the intestinal flora and lower proportion of Verrucomicrobia; at genus level, the proportion of Bacteroides and Oscillibacter in HFD group was higher while the proportion of Akkermansia and Alloprevotella was lower. After the intervention of probiotics, the flora mentioned above was improved significantly except for Alloprevotella. The average number of tumor in HFD group, HFD+P group, ND group and ND+P group was 4.63±1.19, 2.33±0.52, 2.56±0.73 and 2.38±0.52 with statistically significant difference (F=14.92, P<0.01). Conclusion: Probiotics therapy can reduce obesity and flora imbalance caused by HFD and reduce the incidence of CRC by regulating intestinal flora disturbance.
Collapse
Affiliation(s)
- J D He
- Department of General Surgery, the Tenth People's Hospital, Tongji University, Shanghai 200072, China; Research Institute of Intestinal Diseases, Tongji University School of Medicine, Shanghai 200072, China
| | - C Kong
- Department of General Surgery, the Tenth People's Hospital, Tongji University, Shanghai 200072, China; Research Institute of Intestinal Diseases, Tongji University School of Medicine, Shanghai 200072, China
| | - R Y Gao
- Research Institute of Intestinal Diseases, Tongji University School of Medicine, Shanghai 200072, China; Department of Difficult Diagnosis and Treatment Center of Abdominal Surgery, The Tenth People's Hospital, Tongji University, Shanghai 200072, China
| | - F Yin
- Research Institute of Intestinal Diseases, Tongji University School of Medicine, Shanghai 200072, China
| | - Y Zhang
- Research Institute of Intestinal Diseases, Tongji University School of Medicine, Shanghai 200072, China
| | - H L Qin
- Department of General Surgery, the Tenth People's Hospital, Tongji University, Shanghai 200072, China; Research Institute of Intestinal Diseases, Tongji University School of Medicine, Shanghai 200072, China; Department of Difficult Diagnosis and Treatment Center of Abdominal Surgery, The Tenth People's Hospital, Tongji University, Shanghai 200072, China
| |
Collapse
|
3
|
Abstract
High exchange-coupled Nd2Fe14B/Fe3B nanocomposites were synthesized by an integrative procedure of thermal decomposition and reductive annealing processes. The molar ratio of the resulting products of Nd/Fe/B can be tuned by adjusting the raw material proportion. The as-prepared nanocomposites exhibited an exchanged coupled effect with a large coercivity of 11 100 Gs, enhanced remanence Mr of 42.0 emu g(-1), and Mr/M3T of 0.59.
Collapse
Affiliation(s)
- L Q Yu
- College of Science, China University of Petroleum, Qingdao 266580, China.
| | | | | | | | | | | |
Collapse
|
4
|
He JD, Dereniak EL. Error-free image compression algorithm using classifying-sequencing techniques. Appl Opt 1992; 31:2554-2559. [PMID: 20725182 DOI: 10.1364/ao.31.002554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The development of a new error-free digital image compression algorithm is discussed. Without the help of any statistics information of the images being processed, this algorithm achieves average bits-per-word ratios near the entropy of the neighboring pixel differences. Because this algorithm does not involve statistical modeling, generation of a code book, or long integer-floating point arithmetics, it is simpler and, therefore, faster than the studied statistics codes, such as the Huffman code or the arithmetic code.
Collapse
|
5
|
Voelker MA, Hameroff SR, He JD, Dereniak EL, McCuskey RS, Schneiker CW, Chvapil TA, Bell LS, Weiss LB. STM imaging of molecular collagen and phospholipid membranes. J Microsc 1988; 152:557-66. [PMID: 3253448 DOI: 10.1111/j.1365-2818.1988.tb01421.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The application of STM to biological materials has been limited by poor conductivity, sample geometry and stability of biological materials. In this paper we describe an STM study of the monomeric helical forms of collagen, a stable, conductive and widely prevalent structural protein. We have also used STM to image artificial Langmuir DPE (dipalmitoyl phosphatidyl ethanolamine) phospholipid membranes. Both molecular collagen and the phospholipid membranes were dried in air on highly oriented pyrolytic graphite (HOPG). Our STM images of collagen dried on HOPG reveal strands 15 A in diameter with a periodicity of about 30 A which correlates with that known to occur in collagen. Spikes which periodically protrude from strands in our STM images of collagen appear to represent pyrrolidine ring structures in the amino acids proline and hydroxyproline. Thus, we report the first STM imaging of native biomolecules revealing intramolecular details and what appear to be specific amino acids. STM imaging of phospholipid membranes show a lattice pattern with densities spaced approximately 4.5 A apart. These are thought to represent individual phospholipid molecules in an artificial membrane formed on the HOPG. We believe STM and its related technologies will have great future utility in biomolecular studies.
Collapse
Affiliation(s)
- M A Voelker
- Optical Sciences Center, University of Arizona, Tucson 85724
| | | | | | | | | | | | | | | | | |
Collapse
|